CN101166916A - Cage for radial needle roller bearing, method of manufacturing cage, and radial needle roller bearing - Google Patents

Abstract

A retainer for a radial needle bearing, a method of manufacturing the radial needle bearing, and the radial needle bearing. In the method, retainer elements (18) having elementary column parts (17) and (17) projected from rim parts (11) are manufactured by punching and bending a sheet metal. The rim parts (11) and (11) of the pair of retainer elements (18) and (18) are disposed concentrically to each other, and with the circumferential phases of the elementary column parts (17) and (17) aligned with each other, the tips of these elementary column parts (17) and (17) are abutted on and welded to each other to form column parts. Thus, the roundness of the rim parts (11) and (11) and the shape accuracy and the interval accuracy of the column parts can be improved without performing troublesome machining.

Description

Cage for radial needle roller bearing, method of manufacturing cage, and radial needle roller bearing

technical field

The present invention relates to an improvement of a cage for radial needle bearings and a manufacturing method of the cage, and realizes a cage capable of stably obtaining a cage of excellent quality and manufactures such a cage. method of cage.

Background technique

Radial needle roller bearings are installed on the rotating support part of the automobile transmission or the rotating supporting part of various types of mechanical devices that apply large radial loads. For example, in a planetary gear type transmission constituting an automatic transmission for automobiles known through the specification of Patent Document 1 and the like, the planetary gears are rotatably supported by radial needle bearings with respect to the carrier. FIG. 33 shows an example of a rotation support for a planetary gear, which supports the planetary gear in a rotatable manner with respect to this type of carrier or the like. In the case of the structure shown in FIG. 33, both end portions of the support shaft 3 are supported and fixed at a plurality of positions along the circumferential direction of a pair of support plates 2a, 2b constituting the bracket 1 parallel to each other. In the claims is the part corresponding to the counterpart of the inner ring. Further, a planetary gear 4 , which is a member corresponding to the outer ring counterpart, is rotatably supported on the circumference of the middle portion of the support shaft 3 through a needle bearing 5 .

In this needle roller bearing 5, a plurality of needle rollers 6, 6 are held so as to freely roll by a cage 7, which is a cage for radial needle roller bearings, and since it is formed as a cylindrical surface The outer peripheral surface of the middle portion of the supporting shaft 3 is made to function as an inner raceway (raceway) 8, and the inner peripheral surface of the planetary gear 4 forming a cylindrical surface is manufactured to function as an outer raceway 9, so each The rolling surfaces of the needle rollers 6 , 6 are in contact with these inner ring raceways 8 and outer ring raceways 9 . In addition, floating washers 10a, 10b are provided between the two axial end faces of the planetary gear 4 and the inner surfaces of the two support plates 2a, 2b, respectively, in order to try to reduce the force acting on the two axial end faces of the planetary gear 4 and the two support plates. Friction between the inner surfaces of 2a, 2b.

The cage 7 constituting the radial needle roller bearing 5 includes a pair of ring-shaped rim portions 11, 11, and a plurality of cylindrical portions 12, 12, as shown in detail in FIGS. 34 to 35, the rim The parts are arranged so as to be spaced apart from each other in the axial direction (in the left-right direction of FIGS. 33 to 35 and vice versa). Each cylindrical portion 12, 12 is discontinuously arranged above the circumferential direction, and is respectively connected at its two ends to the mutually facing inner surface portions of the two rim portions 11, 11, the inner surface portions abutting against the inner surface the outer diameter side. In addition, the cylindrical portions 12, 12 each have a shape bent toward the inner diameter direction in a trapezoidal configuration at an axially intermediate portion thereof. Then, the space portion surrounded by the circumferential side edges of the respective cylindrical parts 12, 12 adjacent to each other in the circumferential direction and the mutually facing inner surfaces of the rim parts 11, 11 is made to form the cavities 13, 13, And each needle roller 6, 6 is held in each cavity 13, 13 so as to roll freely therein.

As conventionally known through Patent Document 2 and the like, the cage 7 constituted in this manner is manufactured in a cylindrical shape from a rounded strip-shaped metal plate (in general, a steel plate or a stainless steel plate). That is, although its description is omitted, the first-stage intermediate material having a basic cross-sectional shape as a cage is used to hold the respective needle rollers 6, 6 so as to hold the respective needle rollers 6, 6 in their The inner free-rotating cavities 13, 13 are punched out by shearing the first-stage material, which then forms the second-stage intermediate material. Also, this second-level intermediate material is cut into a predetermined length, thereby forming a third-level intermediate material 14, as shown in FIG. 36 .

Then, this tertiary intermediate material 14 is wound into a cylindrical shape, and both ends are butt-welded together to form the cage 7 as shown in FIG. 34 . It should be noted that, in the case of the example described, in order to limit the radial position of the cage 7, the outer peripheral surface of the cage 7 is made to lie close to and face the outer ring raceway (cf. FIG. 33). Then, in operation, by making the outer ring raceway 9 guide in such a way (outer ring guider) that the cage 7 is made to be located close to and facing the outer circumferential surface of the outer ring raceway, the relative radial direction of the cage is achieved. positioning to prevent vibration and noise.

In addition, on the cage, locking protruding portions 15, 15 are provided at the positions of both ends, and along the side edges of the respective cylindrical portions 12, 12 aligned with each other in the circumferential direction, so that from the respective side edges thereof Protrude along the circumference. These respective locking projections 15 , 15 are intended to prevent the respective needle rollers 6 , 6 held in the respective recesses 13 , 13 so as to rotate freely therein, from radially dislodging from the respective recesses 13 , 13 . That is, when the respective needle rollers 6, 6 are inserted between the inner ring raceway 8 and the outer ring raceway 9 together with the cage 7 (refer to FIG. 33), these respective needle rollers 6, 6 need to be in such a state Retained in each cavity 13, 13, so that its radial deviation from its original position is prevented.

Accordingly, each locking protrusion portion 15, 15 is disposed in the opening of each recess 13, 13 at a portion located more radially outward than the pitch circle of each needle roller 6, 6 in such a state that the engaging protrusion facing each other, and the space D15 between the distal edges of the respective locking protruding portions 15, 15 is made smaller than the outer diameter D6 of the respective needle rollers 6, 6 (D6>D15) (refer to FIG. 33 ). Together with these, in the middle part of each cylindrical part 12, 12, between the mutually facing side edges of the inner diameter side locking parts 16, 16 located further radially inward than the pitch circle of the respective needle roller 6, 6 The space D16 (refer to FIG. 33 ) is also made smaller than the outer diameter D6 (D6>D16).

To hold the respective needle roller 6 , 6 in the respective pocket 13 , 13 , the respective needle roller 6 , 6 is pushed into the respective pocket 13 , 13 from the inner diameter side of the cage 7 . When this occurs, the space D16 between the side edges of the inner diameter side locking portions 16, 16 is elastically expanded by the respective needle rollers 6, 6 so as to allow the respective respective needle rollers 6, 6 to pass between these side edges. Since the respective needle rollers 6, 6 are held in the respective recesses 13, 13 in this manner, the respective locking portions 15, 15 prevent the respective needle rollers 6, 6 from moving radially outwards from the original position of the cage, and The retainer is prevented radially inwardly from its original position by the side edges of the inner diameter locking portions 16 , 16 of the respective cylindrical portions 12 , 12 . In addition, although description is omitted, there may be a case where each needle roller is pushed into each pocket from the outer diameter side of the cage. Furthermore, there may be a cage without such respective locking protrusion portions 15 , 15 and respective inner diameter side locking protrusions 16 , 16 .

In the cage for needle rollers made of sheet metal having the above-mentioned structure, it is difficult to achieve good shape accuracy, so good performance cannot necessarily be easily obtained. This is because since the intermediate material 14 shown in FIG. 36 is surrounded into a cylindrical shape, and both ends are butt-welded together to form the cage shown in FIGS. 33 to 35, this is due to the following reasons (1) to (5). The shape got worse.

(1) The radius of curvature of the portion where the two ends of the intermediate material 14 in a cylindrical shape are butt-welded together is difficult to match with the radius of curvature of another intermediate material, so that the roundness of the pair of rims 11, 11 get worse.

(2) And, with respect to the longitudinal axis (the vertical direction of Fig. 36), the middle part of the middle material 14, because the rigidity of the part connected to the cylindrical parts 12, 12 is different from the rigidity between the respective connecting parts, it is very It is difficult to form the two rim portions into correct circles. Specifically, the substantially polygonal shape causes the respective connection portions in the polygonal shape to become linear shapes, and the portions between the respective connection portions to become arcuate shapes.

(3) The intermediate material is round, but the cross-sectional shape of the portion constituting each columnar portion 12, 12 remains a linear shape.

(4) The spaces between the cylindrical portions 12 , 12 adjacent to each other in the circumferential direction are easily made to be slightly different from each other, and when they become different, the width dimensions of the cavities 13 , 13 become unequal.

(5) When the cross-sectional shape of the cage 7 is substantially formed into an M-shape as shown in FIGS. The influence of the edge portions 11, 11 easily deforms finely.

In conventionally known cages for radial needle roller bearings and methods of manufacturing the cages, there may be cases where the shape changes due to the above-mentioned reasons (1) to (5). Worse, as a result there is the possibility that the needle rollers 6, 6 are made to be difficult to fit in the respective cavities 13, 13, or on the contrary, the needle rollers 6, 6 installed in this way suddenly break away from their original position. Location. Of course, the foregoing disadvantages can be prevented by subjecting the cage 7 manufactured in the manner shown in FIG. 34 to the shape correction process, but its cost increases, so this is not preferable. Furthermore, since the retainer 7 is obtained to have the above-described substantially M-shaped cross section, it is troublesome to produce an intermediate material as shown in FIG. 36 from a strip material plate, which causes an increase in production cost.

Furthermore, although the invention described in Patent Document 3 relates to a cage for a needle roller bearing divided into two, the structure is such that the divided cage is so separated and not joined together, and the structure is basically different from the target structure of the present invention.

Patent Document 1: JP-A-2002-235841

Patent Document 2: JP-A-8-270658

Patent Document 3: JP-A-2004-28134

Contents of the invention

The present invention has been made in view of the circumstances described above, with the object of realizing a cage for radial needle roller bearings and a method of manufacturing such a cage, which enable a cage of good quality to be obtained in a stable manner.

In the cage for radial needle roller bearings of the present invention and the method of manufacturing such a cage, the cage for radial needle roller bearings proposed in the first aspect of the present invention, as in the above-mentioned Patent Document 1 Like the conventionally known cages for radial needle roller bearings described, they are of the type manufactured from sheet metal. In addition, a cage for a radial bearing includes a pair of ring-shaped rim portions disposed at both end portions so as to face each other, and a plurality of rim portions disposed so as to extend between the two rim portions. The cylindrical portion, in which the portion whose four sides are surrounded by the cylindrical portion and the two rim portions adjacent to each other in the circumferential direction, is made as a concave cavity.

Specifically, in the cage for radial needle roller bearings proposed according to the first aspect of the present invention, by engaging the distal end portion of the cylindrical element portion with the other rim portion, the cylindrical element portion The proximal portion is made continuous with one of the two rim portions, constructing the respective cylindrical portions, or by making the distal portion of the cylindrical element portion and its proximal portion with the other The distal end portions of successive cylindrical element portions of the rim portion join to construct the respective cylindrical portion.

When carrying out the invention set forth in the first aspect of the invention, as described, for example according to the second aspect of the invention, it is preferred to form respectively on two said rim portions and connect together at their distal end portions. One of the distal ends of the cylindrical portion is manufactured as a concavely curved edge and the other distal edge is manufactured as a convexly curved edge engaging the concavely curved edge. Furthermore, with the phases of the respective cylindrical element portions aligned with each other with respect to the circumferential direction of the annular rim portion, the distal edges of the respective cylindrical element portions are made to abut each other, and the respective Butt sections of the cylindrical element sections are welded together.

Optionally, as proposed in the third aspect of the present invention, the distal edges of the respective cylindrical element portions respectively formed on the two rim portions are aligned with the circumferential direction of the rim portion The same angle is alternately tilted in opposite directions. Furthermore, by abutting the distal end edges inclined in the same direction with each other, as the phases of the respective cylindrical element portions are mutually aligned with respect to the circumferential direction of the rim portion, the distal ends of the respective cylindrical element portions are mutually aligned. The butt sections of the end edges are welded together.

By constructing the cage in the above-described manner, since the phases of the respective cylindrical element portions are correctly aligned with each other, a cage of good quality can be easily obtained.

Also, as proposed in the fourth aspect of the present invention, by connecting the distal end portions of the respective cylindrical member portions respectively formed on the two rim portions to each other by making the male-female engagement portion male-female engagement, the The male and female engaging portions are respectively provided on the inner peripheral surface of the distal end portion of the cylindrical member portion on the one rim portion and the distal end of the cylindrical material portion on the other rim portion. Part of the outer peripheral surface.

By adopting such a structure, welding of the distal end portion of each cylindrical element portion can also be omitted, for example, where the rotational speed is low in use and the centrifugal force exerted on the respective cylindrical element portion is limited.

Furthermore, as proposed in the fifth aspect of the present invention, the joining portion at which the distal end portions of the respective cylindrical member portions are joined together is provided in a position where the needle rollers are held in the respective cavities without contacting the joining portion. In this case, it is possible to prevent the rolling surface of the needle roller from being damaged by the engaging portion.

Furthermore, in order to obtain a structure in which the distal end portion of each cylindrical element portion is joined to another rim portion, as proposed in the sixth aspect of the present invention, each of the cylindrical elements formed on the one rim portion The distal end face of the element portion is welded or bonded to the other rim portion in such a state that the distal end face is made to abut against one of the other rim portions closer to its outer diameter side. portion on the axial side surface.

Optionally, as proposed in the seventh aspect of the present invention, the distal end portion of each of the cylindrical element portions formed on the one rim portion fits on the outer peripheral edge formed on the other rim portion part of the cutout. Furthermore, adjoining surface portions between the distal end portions of the respective cylindrical member portions and the inner surfaces of the respective cutouts are welded or bonded together.

Optionally, as proposed in the eighth aspect of the present invention, a radially outwardly recessed stepped concave portion is formed in the inner portion of the distal end portion of each of the cylindrical element portions on the one rim portion on the circumferential surface. In addition, part of the distal end portion of each cylindrical element portion located in a position on the periphery of the stepped concave portion fits in a cutout formed on an outer peripheral edge portion of the other rim portion. , and the raised surface at the end of the stepped concave portion is made to abut the axial one side surface of the other rim portion. And, at least part of the abutment surface between the distal end portion of each cylindrical element portion and the inner surface of each cutout is welded or bonded together.

In addition, the radial needle roller bearing proposed in the ninth aspect of the present invention includes an inner ring counterpart in which a cylindrical inner ring raceway is provided on its outer peripheral surface; an outer ring counterpart in which a cylindrical outer ring raceway is provided in on its inner peripheral surface; a plurality of needle rollers rotatably provided between the inner ring raceway and the outer ring raceway; and an outer ring track so as to be freely rotatable, and a cage for holding The individual needles are rolled so as to allow free rolling.

Specifically, in the radial needle roller bearing of the ninth aspect of the present invention, the cage includes a cage for the radial needle roller bearing of any one of the first to eighth aspects of the present invention.

Also, in the method of manufacturing a cage for a radial needle roller bearing proposed in the tenth aspect of the present invention, firstly, a cage member is formed by bending and punching a metal plate, which includes a ring-shaped The rim portion, and its proximal portion are manufactured as a plurality of cylindrical element portions respectively connected to the rim portion. Afterwards, the rim portion of the cage member, and the individually processed rim portions are arranged concentrically with each other, and the distal end portions of the respective cylindrical elements are connected to the individually processed rim portion or the plurality of cylindrical element portions. A distal portion and a proximal portion thereof are respectively manufactured to be connected to the separately machined rim portion.

On the other hand, in carrying out the manufacturing method for the cage of the radial needle roller bearing proposed in the tenth aspect of the present invention, preferably, as proposed in the eleventh aspect of the present invention, first, by The plate portion is punched to obtain a ring portion constituting the rim portion and a tongue-shaped member constituting the cylindrical element portion, which is radially spaced from a plurality of positions located on the outer peripheral edge of the ring portion at equal intervals. Extend outward. Then, the annular portion is bent in the axial direction together with the respective tongues at a portion located closer to the outer diameter side with respect to the tongues, so that the respective tongues are manufactured as cylindrical element portions.

Alternatively, as proposed in the twelfth aspect of the present invention, first, by punching a circular material plate portion, a circular hole located on the inner diameter side of the portion constituting the rim portion and a circular hole along the circular hole are formed. A plurality of prefabricated hole portions are arranged at equal intervals on the periphery of the hole with respect to the circumferential direction. Afterwards, the circular material plate is bent in one direction along the entire circumference of the part between the circular hole and the prefabricated hole so as to form a proximal part thereof which is made to be connected to the part constituting the rim part. part of the cylindrical part. Next, by removing a portion constituting the cylindrical portion and having a phase matching that of each pre-hole portion with respect to the circumferential direction from each pre-hole portion to the cylindrical distal end portion, between the removed portion with respect to the circumferential direction The intervening sections are fabricated as individual cylindrical element sections.

In the case of the cage constructed in the above manner, it is possible to manufacture easily and at low cost a part including the rim portion and the cylindrical member portion with excellent shape accuracy.

Furthermore, in carrying out the manufacturing method for the cage of the radial needle roller bearing set forth in the tenth aspect of the present invention, preferably, as set forth in the thirteenth aspect of the present invention, first, by punching the material plate portion Hole processing, manufacturing the first intermediate material. The first intermediate material is such that a non-circular prefabricated hole is formed in a radially central portion, the inner diameter of which is smaller than that of the portion constituting the rim portion, at a pad portion in the portion constituting the rim portion and the space portion between the approximate half portions constituting the respective cylindrical element portions is formed at the radially intermediate portion, and the far half portion of the tongue constituting the respective cylindrical element portion is formed circumferentially on the radially outer end portion in multiple locations.

Thereafter, the radially intermediate portion of the first intermediate material is further bent at its radially intermediate portion along its entire circumference, so that the relevant portion is formed into an L-shape in the section constituting the annular portion and the cylindrical portion, thus This first intermediate material is manufactured into a second intermediate material.

Next, the respective base portions which are portions of the cylindrical portion disposed on the second intermediate material and located at portions constituting spaces between approximately half portions of the respective cylindrical element portions are forced radially outwardly. Then, a plurality of tongue-shaped pieces constituting each cylindrical element portion are formed by cutting to separate both end edge portions of each base portion from nearly half portions of each cylindrical element portion in the circumferential direction, This second intermediate material is thus produced as a third intermediate material.

Next, surface stamping is applied to the portion exposed between the respective tongues at the end edges of the cylindrical portion while forcibly extending the respective base portion of the third intermediate material radially outward, the cylindrical portion and the The radius of curvature of the continuous portion between the circular ring portions is made small, so that the third intermediate material is manufactured as a fourth intermediate material.

Next, the respective base portions are cut from the distal edge of the cylindrical portion, and a circular hole matching the inner diameter of the portion constituting the rim portion is punched in the center portion, whereby the fourth intermediate material is fabricated into a fifth intermediate portion. Material.

Also, the individual tongues of the fifth intermediate material are bent, whereby the fifth intermediate material is produced as a cage element.

By constructing in this way, the properties of the surface of the cage in contact with the rolling surface of the needle roller or the axial end surface can be improved, and in addition, the difference between the cylindrical portion and the ring portion constituting the rim portion The radius of curvature of the continuous portion between them can be made very small. Therefore, damage such as harmful scratches hardly occurs on the surface of the needle roller, and furthermore, the axial dimension of the cage can be controlled to be small.

In the case of carrying out the present invention proposed by the thirteenth aspect of the present invention, more preferably, as proposed by the fourteenth aspect of the present invention, when the first intermediate material is manufactured into the second intermediate material, the rise in the relative circumferential direction The tall portion is partially formed along the circumferential direction of the cylindrical portion substantially at a position where both circumferential end edges of each cylindrical member extend. Then, by the existence of the raised portion, the outer peripheral surface of the portion of the outer peripheral surface portion of the cylindrical portion extending approximately half of each cylindrical element portion is made to be located outside the other portion of the cylindrical portion. The circumferential surface is further radially inward.

By constructing the cage in this way, at both axial ends of each cylindrical portion constituting each cylindrical member portion, portions adjacent to the annular portion of the rim portion can be located closer (slidingly) contact) the rolling surface of each needle roller. In addition, the attitude of each needle roller is stabilized (deflection thereof is prevented), thus making it possible to improve the performance of the radial needle roller bearing.

In the case of carrying out the present invention proposed in the thirteenth aspect of the present invention, it is more preferable, as proposed in the fifteenth aspect of the present invention, to expose the The part between each tongue-shaped piece is carried out surface stamping work, thereby, the 3rd intermediate material is manufactured into the 4th intermediate material, and, in such state, promptly each seat part is cut to remove from the far edge of this cylindrical part , Thus, the fourth intermediate material is manufactured into a fifth intermediate material, the cylindrical portion being removed at the portion exposed between the respective tongue-shaped pieces. Then, the portion of the axial end surface of each needle roller abutting with it is made to lie in the same plane as the inner surface of the annular portion.

By configuring the cage in this other way, the axial end faces of the respective needle rollers can be moved as far as the position of the inner surface of the annular portion. In other words, it is possible to prevent the setting of a residual space between the axial end surface of each needle roller and the inner surface of the ring portion, and it is possible to reduce the axial dimension of the radial needle roller bearing, thereby enabling downsizing and weight.

Furthermore, as proposed in the sixteenth aspect of the present invention, in the case of the method of manufacturing the cage used for the radial needle roller bearing of the present invention, first, the portion constituting the rim is formed by performing punching work on a metal plate. An annular portion and a plurality of tongues extending radially from the outer peripheral edge of the annular portion. Thereafter, rectilinear cylindrical intermediate elements parallel to each other are formed by bending these respective tongues at right angles to said circular ring portion. Next, on the distal end portion of the inner diameter side receiving mold on the outer peripheral surface on which the inner diameter The distal end portions of the side molds are inserted into the inner halves of the respective cylindrical intermediate elements in such a state that the phases of the respective convex portions and the phases of the respective cylindrical intermediate elements are relative to the circular ring The circumferential directions of the parts are made to coincide with each other, and then, the outer circumferential surface of each cylindrical intermediate member is pressed against the outer circumferential surface of the inner diameter side receiving mold by the inner circumferential surface of a mold, so that the respective columns The shape intermediate element is manufactured as each second cylindrical intermediate element, wherein the proximal end portion located in the portion substantially matched with the outer peripheral edge of the annular portion relative to the radial direction of the annular portion is manufactured by being located The more proximal curved portion connects the intermediate portion to the distal portion which is located on the inner diameter side than the proximal portion with respect to the radial direction of the annular portion. Thereafter, the inner diameter side receiving die is rotated relative to the annular portion until the phases of the respective concave portions and the phases of the respective second intermediate elements match each other with respect to the circumferential direction of the annular portion, and then , the distal end portion of the inner diameter side receiving mold exits from the inside of each second cylindrical intermediate element.

In addition, more preferably, as proposed in the seventeenth aspect of the present invention, after the distal end portion of the receiving mold on the inner diameter side withdraws from the inside of each second cylindrical intermediate element, the receiving mold on the outer diameter side is arranged on each second cylindrical intermediate member. On the periphery of the intermediate element, and a second inner diameter side receiving die is disposed inwardly of the longitudinal end of the respective second cylindrical intermediate element closer to the annular portion. In these receiving molds, the outer diameter side receiving mold is such that the concave portion and the convex portion are arranged in the inner portion of the axially intermediate portion of the longitudinally intermediate portion outer peripheral surface thereof facing the second cylindrical intermediate member. on the circumferential surface. In addition, the second inner diameter side receiving die is, for example, has a structure similar to the distal end portion of the inner diameter side receiving die. The second mold is forced into the inside of the longitudinal distal end portion of each second cylindrical intermediate member in such a state that the second inner diameter side receiving mold and the outer diameter side receiving mold are arranged at the above-mentioned predetermined positions, Such that each second cylindrical intermediate element is held between the second mold, the outer diameter side receiving mold and the second inner diameter side receiving mold. A curved portion located closer to the distal end portion in a direction opposite to a curved portion closer to the proximal end portion is formed between the intermediate portion and the distal end portion of each second cylindrical intermediate member by providing a process, thus, the Each second cylindrical intermediate element is manufactured as a cylindrical element part and as a cage element. Thereafter, the outer diameter side receiving die and the retainer member are rotated relative to each other until the phases of the respective concave portions on the inner peripheral surface of the outer diameter side receiving die and the cylindrical member portion coincide with each other, so that the retainer member The perimeter moves the outer diameter side to receive the mold. In addition, the second inner diameter side receiving die is rotated relative to the annular portion until the phases of the respective concave portions and the phases of the columnar element portion coincide with each other in the circumferential direction of the annular portion, and then the second inner diameter side receiving die is held from the holding die. The inside of the shelf element exits.

Advantages of the invention

According to the cage for the radial needle roller bearing of the present invention constructed as described above, the manufacturing method for the cage and the radial needle roller bearing, it is possible to control the shape of a pair of rim portions and each cylinder without a correction process or the like. Part shape accuracy, specifically, without any troublesome machining. Furthermore, the installation of the needle rollers in the respective cavities is facilitated and the prevention of dislocation of the needle rollers once installed is sufficiently achieved.

Description of drawings

Fig. 1 is a perspective view of a first embodiment of the present invention, showing a state before a pair of cage elements are connected together;

Figure 2 is a plan view and a cross-sectional view showing the manufacturing method of the cage element in the order of steps;

3 is a partial perspective view showing Embodiment 2 of the present invention;

4 is a partial perspective view showing Embodiment 3 of the present invention;

5 is a partial perspective view showing Embodiment 4 of the present invention;

Fig. 6 is a view viewed along the direction indicated by the arrow in Fig. 5;

Fig. 7 is a plan view and a cross-sectional view, showing the manufacturing method of the cage element of Embodiment 5 of the present invention in the order of steps;

Fig. 8 is a plan view and a cross-sectional view showing the manufacturing method of the cage element of Embodiment 6 of the present invention in sequence of steps;

9 is a plan view and a cross-sectional view showing the first half of the manufacturing method of the cage member of Embodiment 7 of the present invention in order of steps;

Fig. 10 is a plan view and a cross-sectional view showing the second half of the manufacturing method of the cage member of Embodiment 7 of the present invention in order of steps;

Fig. 11 is a part showing a cage element manufactured by the manufacturing method of Embodiment 7, wherein (a) and (b) are perspective views viewed from the radially inner and radially outer sides of the cage element, and (c ) is a sectional view taken along the line B-B of (a);

Fig. 12 is a sectional view showing Embodiment 10 of the present invention;

Figure 13 is a view viewed from the right side of Figure 12;

Fig. 14 is a perspective view of the cage, showing the state before the cage element is connected to another edge portion;

Fig. 15 is a plan view and a cross-sectional view showing the processing method of the cage element in the order of steps;

16 is a cross-sectional view showing a second intermediate material of Embodiment 11 of the present invention;

Fig. 17 is a cross-sectional view showing a process for processing the second intermediate material into a third intermediate material in steps;

18 is a perspective view showing the structure of the distal portion of the inner diameter side receiving mold;

Fig. 19 is a cross-sectional view showing, in steps, a process for processing the third intermediate material into a cage element;

Fig. 20 is a cross-sectional view showing another edge portion fitted to the cage member;

Fig. 21 is a cross-sectional view showing a state in which a cage member and another edge portion are assembled together;

Fig. 22 is a sectional view showing Embodiment 12 of the present invention;

Figure 23 is a view viewed from the right side of Figure 22;

Fig. 24 is a partial sectional view showing a state before the cage member and another edge portion are assembled together;

Fig. 25 is a partial perspective view showing a state before the cage member and another edge portion are assembled together;

Fig. 26 is a sectional view showing Embodiment 13 of the present invention;

Figure 27 is a view viewed from the right side of Figure 26;

Fig. 28 is a partial sectional view showing a state before the cage member and another edge portion are assembled together;

Fig. 29 is a partial perspective view showing a state before the cage member and another edge portion are assembled together;

30 is a plan view and a cross-sectional view illustrating a method for forming a stepped concave portion at a distal end portion of a tongue;

FIG. 31 is a plan view and a sectional view showing the state of a trimming process for modifying the configuration and size of the concave portion of the step;

Fig. 32 is a perspective view showing a modified example of Embodiment 10 of the present invention;

33 is a partial sectional view showing an example of a conventionally known rotation support device for a planetary gear;

Fig. 34 is a perspective view showing an example of a cage for a radial needle roller bearing which is the object of the present invention;

Figure 35 is a cross-sectional view taken along line C-C of Figure 34; and

Fig. 36 is a view of the intermediate material viewed from the side before being formed into a cylindrical shape, which will form the outer circumferential surface of the intermediate material when it is formed into a cylindrical shape.

Explanation of reference signs

1 bracket

2a, 2b support plate

3 support shafts

4 planetary gear

5 Radial Needle Roller Bearings

6 needles

7 cage

8 inner ring raceway

9 outer ring raceway

10a, 10b Floating washers

11 rim part

12 column parts

13 cavity (pocket)

14 intermediate material

15 locking protrusion

16 inner diameter side locking part

17, 17a, 117b, 17c, 17d, 17e, 17f, 17g, 125, 125a, 125b, 125c, 125d cylindrical element part

18, 126 cage element

19, 119a material plate

10. 120a first intermediate material

21, 121a ring part

22, 122a Tongue piece (tongue piece)

23, 123a, 124a second intermediate material

24 concave curved sides

25 convex curved sides

26a, 26b Sloped sides

27 Engage the concave part

28 to engage the male part

29 Second intermediate material

30 round holes

31 prefabricated hole part (preparation hole portion)

32 first intermediate material

35 material plates

36 first intermediate material

37 prefabricated holes

38 edge part

39 base (pad) part

40 first half

41 ring part

42 cylindrical sections

43 Second intermediate material

44 third intermediate material

45 Tongue pieces

46 Fourth intermediate material

47 round holes

48 fifth intermediate material

49a, 49b raised part

50a, 50b Inclined surfaces

128 cylindrical intermediate elements

129 punching machine

130 base (pad)

131 inner diameter side receiving mold

132 mold (die)

133 Third intermediate material

134 proximal part

135 middle part

136 distal part

137 nearer to the curved portion of the proximal portion

138 second cylindrical intermediate element

139 positioning concave part

140 base part

141 convex part

142 cylindrical sections

143 center hole

144 putters

145 guide plate

146 spring housing (spring housing)

147 spring seat

148 push spring

150 clearance part

151 outer diameter side receiving mold

152 second inner diameter side seat

153 convex part

154 concave part

155 second mold

156 more distal bend

157a, 157b incision (notch)

158 Narrowed part

159 steps concave part

Detailed ways

(Example 1)

1 to 2 show Embodiment 1 of the present invention. The cage for the radial needle roller bearing in the completed state in this embodiment becomes a cage of a conventional structure substantially similar to that of FIGS. 33 to 35 described above. The shape of the finished state differs only in the cross-sectional shape of each cylindrical portion 12 , 12 with respect to a mirror plane intersecting the center line at right angles (cf. FIGS. 33 to 35 ). This embodiment is characterized in that each cylindrical member 12, 12 is constructed by butting the distal end edges of pairs of cylindrical element portions 17, 17 to each other and welding the butted portions. Furthermore, by adopting a structure like this, not only the roundness of the pair of rim portions 11, 11 but also the shape accuracy and dimensional accuracy of each portion are improved, and the cross-section of each cylindrical portion 12, 12 with respect to the mirror image The shape is formed into a circular arc shape.

Thus, in the case of this embodiment, a pair of cage elements 18, 18 are produced by bending and punching a sheet metal. The cage elements 18, 18 each comprise a ring-shaped rim portion 11 and a plurality of cylindrical element portions 17, 17, the proximal end portions of which are made to extend to the rim portion 11, respectively. In the case of this embodiment, a cage element 18 like this is manufactured in the manner shown in FIG. 2 . It should be noted that in above-mentioned Fig. 2 (and Fig. 7, 8 which will be described later), with respect to the circumferential direction of each cylindrical element 17, 17 and the tongue-shaped piece 22, 22 constituting the respective cylindrical element 17, 17 The spacing shown is smaller than the actual spacing.

Initially, a circular material plate 19 as shown in FIG. 2(A) is obtained by punching a steel plate or a stainless steel plate formed into a coil.

Next, the first intermediate material 20 as shown in FIG. 2(B) is obtained by punching the material plate member. That is, by punching out the center portion of the material plate 19 in a circular shape and punching out the portion from the radially middle portion to the outer peripheral edge portion in a slit-like form, the ring portion 21 constituting the rim portion is formed at the center. Part, and the tongue portion 22 constituting each cylindrical portion 17, 17 is formed so as to extend radially outward from a plurality of positions located at equal intervals along the outer diameter edge of the annular portion. A convex portion (see FIGS. 13 to 35 ) constituting the locking protrusion portion 15 , 15 is formed on each tongue portion 22 , 22 when each cylindrical portion 12 , 12 is formed.

Next, the first intermediate material 20 is manufactured into a second intermediate material 23 by performing a step providing process as shown in FIG. 2(C) on the first intermediate material 20 . This second intermediate material 23 is formed, for example, by cranking the middle part of each tongue 22 , 22 over part of the first intermediate material 20 . Processing like this is achieved in connection with the fact that the shape of the holder 7 of the finished product is formed substantially in an M-shape as shown in FIGS. 33 to 35 . When this occurs, press work is also performed on each tongue piece 22, 22 so that the cross-sectional shape of each tongue portion 11, 11 is formed into a circular arc shape. The radius of curvature of this arcuate shape is controlled in such a way that, upon forming each cylindrical portion 12, 12 from each tongue 22, 22, each cylindrical portion 12, 12 exists within a single mirrored cylindrical space. In this way, processing for obtaining the second intermediate material from the first intermediate material 20 can be performed easily and very accurately by press-working the first intermediate material 20 between a pair of upper and lower molds provided on a press bed.

Then, the cage member 18 is manufactured by performing drawing and bending work on the second intermediate material 23 as shown in FIG. 2(D) . This drawing and bending process realizes like this: along its entire circumference at right angles by bending together with each tongue-shaped member 22,22 in the axial direction (in the lower figure of Fig. 2) of annular portion 21. At the portion of the ring portion 21 located closer to the outer diameter side thereof, until the respective tongues 22 , 22 become parallel to each other. The second intermediate material 23 is produced as the respective cage element 18 and the respective tongue 22 , 22 is produced as the respective cylindrical element part 17 , 17 by such drawing and bending.

In order to manufacture the cage of this embodiment, the cages obtained in the manner described above are each arranged in such a way that their rim portions 11, 11 are arranged opposite each other and their cylindrical element portions 17, 17 along the circumference The phases of are made to coincide with each other. This processing is performed in such a state that the two cage elements 18, 18 are clamped by a pair of clamping portions (fingers) provided on the fitting device. Due to the mutual concentric arrangement of the two clamping parts and the free adjustment of the phase with respect to the direction of rotation, the rim parts 11 , 11 for the mutual concentric arrangement of the two cage elements 18 , 18 and the cylindrical element parts 17 , 17 The operation in which the phases of the phases coincide with each other can be realized easily and with high precision.

When the cage elements 18, 18 have been arranged in the manner described above, the two cage elements 18, 18 are approached to each other so that the distal end portions of the respective cylindrical element portions 17, 17 are abutted against each other and the abutment portions are welded together , so that the two cage elements 18 , 18 are fixedly connected to each other. Due to this welding process, grooves (bevels) are formed between the distal edges (sides) of the respective cylindrical element portions 17 , 17 . The respective cylindrical intercloud portions 17 , 17 , whose distal edges are butted and then welded together, then constitute the respective cylindrical portion 12 , 12 . Further, portions surrounded by the respective cylindrical portions 12, 12 and the two rim portions 11 adjacent to each other in the circumferential direction become recessed cavities 13, 13, respectively (refer to FIGS. 33 to 35).

Due to the possibility of micro-bulges at the butt and welded parts of the respective cylindrical element parts 17, 17, finishing is required in order to make the central part of the two side edges completely smooth along the circumferential direction of the respective cylindrical part 12, 12 processing. However, when such a finishing process is performed, the production cost of the cage increases, which is not preferable. On the other hand, the circumferentially opposite sides of each cylindrical portion 12, 12 do not have to engage (contact) the rolling surfaces of the needle rollers 6, 6 held in the respective pockets 13, 13 along their entire lengths. Then, it is preferable to prevent butt jointing and welding by making the distal end portion of each cylindrical element portion 17, 17 narrower than its proximal end and middle portion and performing welding on the outer circumferential surface side of each cylindrical element portion 17, 17 Parts of the rolling surfaces of the needle rollers 6, 6 are in contact with each. By constructing the cylindrical member portions 17, 17 in this way, even without finishing the welded surfaces, it is possible to prevent the rolling surfaces of the respective needle rollers 6, 6 from being damaged due to the partial rolling surface pair existing at the butted and welded portion. The friction of the raised part is damaged.

In the case of the cage for a radial needle roller bearing of the present invention constructed and manufactured in the above-described manner, the shape accuracy can be easily improved, and the performance of the radial needle roller bearing in which such a cage is installed can be improved. The following (1) to (5) are the reasons for this.

(1) Since the annular portion 21 of the cage member 18, 18 constituting the two rim portions 11, 11 is manufactured by punching out the plate-like material plate 19, the rim manufactured by the annular portion 21 can be improved. Roundness of parts 11, 11.

(2) processing for bending the annular portion 21 at a right angle along its entire circumference at a portion of the radially intermediate portion located closer to its outer diameter side, so as to produce the cage member 18 from the second intermediate material 23, This is performed with a large force by using a press or the like. Accordingly, the two rim portions 11, 11 can be easily formed into a correct circular shape, and the entirety of the cage member 18 thus obtained can be formed into a precise circular shape without polygonal shapes.

(3) Since the cross-sectional shape of each cylindrical member portion 17 , 17 constituting each cylindrical portion 12 , 12 can be bent in advance, the cross-sectional shape of these respective cylindrical portions 12 , 12 can be formed in an arc shape.

(4) The spacing between the cylindrical portions 12, 12 adjacent to each other in the circumferential direction can be made to match each other in a strict manner, so that the cavities 13, 13 formed between the respective cylindrical portions 12, 12 can Manufactured to match each other exactly.

(5) Since, even in the case where the cross-sectional shape of the retainer 7 is formed into a substantially M-shape, the shapes of the respective columnar element portions 17, 17 are never deformed when the rim portion 11 is processed, the use of each column The shapes of the respective cylindrical parts 12, 12 made of the shaped element parts 17, 17 are also never deformed.

In the case of this embodiment, excellent shape accuracy and dimensional accuracy can be obtained for the reasons described in (1) to (5) above, regardless of whether the cage can be manufactured at low cost, thereby preventing the individual rollers from It happens that the needles 6, 6 are difficult to manufacture to be installed in the respective recesses 13, 13, or the respective needle rollers 6, 6 so installed suddenly come out of their original positions.

(Example 2)

Fig. 3 is Embodiment 2 of the present invention. In the case of this embodiment, one of the distal edges of the respective cylindrical element parts 17a, 17b whose ends are connected to each other is made as a concavely curved edge 24, while the other is made as a convexly curved edge 25. , which engages the concavely curved edge 24 . The radii of curvature of both the concavely curved edge 24 and the convexly curved edge 25 are made identical to each other, so that both curved edges 24, 25 achieve a tight engagement with each other. Furthermore, as the phases of the respective cylindrical member portions 17a, 17b with respect to the circumferential direction of the rim portions 11, 11 (refer to FIG. 1) of a pair of cage members 18, 18 are made to match each other, the respective cylindrical The distal edges of the parts 17a, 17b are made to abut each other and the abutting parts of the respective cylindrical element parts 17a, 17b are made to be welded together.

In the case of this embodiment, by configuring the cylindrical element portions in the above-described manner, the phases of the respective cylindrical element portions 17a, 17b are made to match each other correctly, and thus a cage of good quality can be facilitated. Other structures and functions are similar to Embodiment 1 already described above.

(Example 3)

Fig. 4 is embodiment 3 of the present invention. In the case of this embodiment, the distal edge of the respective cylindrical element part 17c, 17d which constitutes the respective cage element 18, 18 is manufactured as a beveled edge 26a, 26b which is respectively relative to the wheel. The peripheral portions of the rim portions 11, 11 (refer to FIG. 1) are inclined. The respective inclined edges 26a, 26b are alternately inclined in opposite directions with respect to the circumferential direction of the rim portion 11, 11 and at the same angle. Then, by butting the distal edges inclined in the same direction with each other, the butt portions of the distal edges of the respective cylindrical element parts 17c, 17d are welded in such a state that the respective cylindrical element parts 17c, 17d are welded with respect to the circumferential direction. phases are made to match each other.

Also in the case of this embodiment, by constructing the cylindrical element portions 17c, 17d in the above-described manner, the phases of the respective cylindrical element portions 17c, 17d are made to match each other correctly, thus making it possible to facilitate holding with good quality. shelf. Other structures and functions are similar to Embodiment 1 already described above.

(Example 4)

5 and 6 are Embodiment 4 of the present invention. In the case of this embodiment, the respective cylindrical member portions 17e, 17f constituting the respective cage members 18, 18 are connected together by making the distal edges of the respective cylindrical member portions 17e, 17f realize male-female engagement. . Therefore, in the case of this embodiment, the engaging concave portion 27 is formed on the distal inner peripheral surface of one cylindrical element portion 17e, and the engaging convex portion is formed on the distal end portion of the other cylindrical element portion 17f. on the outer peripheral surface. The engaging concave portion 27 and the engaging convex portion 28, when forming the respective cage elements 18, 18, are formed by plastic deformation of the partial sheet metal of the raw material (e.g. when manufacturing the second intermediate as shown in FIG. Material 23).

A pair of retainer members 18, 18 including the respective cylindrical member portions 17e, 17f having the engaging concave portion 27 or the engaging convex portion 28 formed on the distal end portion thereof, is brought closer to each other via the engaging concave portion. 27 are interconnected by the male-female engagement of the engaged convex portion 28 . The engaging concave portion 27 and engaging convex portion 28 form a circular arc shape when viewed from the radial direction. Therefore, since the engaging concave portion 27 or the engaging convex portion 28 realizes the male-female engagement with each other, the respective columnar element portions 17e, 17f are connected together in such a manner that they are not separated from each other in the axial direction, and at the same time, prevent the respective columnar elements from being separated from each other. The element parts 17e, 17f slide to move in the circumferential direction.

By adopting such a structure, the welded distal end of each cylindrical element portion 17e, 17f can be saved when the rotational speed is low and the centrifugal force acting on the respective cylindrical element portion 17e, 17f is limited in use. go. Other structures and functions are similar to Embodiment 1 already described above.

(Example 5)

Fig. 7 is Embodiment 5 of the present invention. This embodiment and Embodiments 6, 7 to be described later relate to a method of manufacturing the cage element 18 . As for the shape and structure of the cage member 18 to be manufactured and the connection and fixing method of the cage member 18 thus obtained, any one of Embodiments 1 to 4 can be used.

Still under the situation of this embodiment, at first, by carrying out punching work to the part circular material plate part 19 shown in Figure 7 (A), manufacture the first intermediate material 20 shown in Fig. 7 (B) . The steps taken until the first intermediate material is produced are similar to those described in Example 1.

In the case of this embodiment, the first intermediate material 20 is formed into a shape by subjecting the first intermediate material 20 to a radially intermediate portion closer to its inner diameter side. On the part (the part of the circular ring part 21 that is located in the radial direction closer to its outer diameter side) is bent at right angles along its entire circumference, thus the first intermediate material 20 is manufactured as shown in FIG. 7(C) Second intermediate material 29 . Then, the second intermediate material 29 is subjected to undercut molding processing to form the middle portion of each tongue-shaped member 22, 22 into a crank-shaped bend so as to manufacture the cylindrical element portion 17, 17, so that the second intermediate material 29 is manufactured. A cage member 18 as shown in FIG. 7(D) is formed.

(Example 6)

Fig. 8 is Embodiment 6 of implementing the present invention. In the case of this embodiment, the inner diameter side of the portion constituting the rim portion is formed by performing punching work as shown in FIG. 8(B) on a partially circular material plate 19 as shown in FIG. 8(A). The circular hole 30 and a plurality of prefabricated hole parts 31, 31, thus making the first intermediate material plate 32.

Thereafter, the first intermediate material 32 is bent at right angles along its entire circumference between the circular hole 30 and the prefabricated holes 31 , 31 to form a cylindrical portion 33 by drawing the first intermediate material 32 , the proximal portion thereof is made to extend to the portion constituting the rim portion, thus being made into a second intermediate material 34 as shown in FIG. 8(C).

Next, those parts that are the cylindrical part 33 and whose phase with respect to the circumferential direction coincide with the prefabricated holes 31, 31 are removed along the distal end of the cylindrical part and are located in the middle between the removed parts Portions are bent into a crank shape with respect to the circumferential direction so as to form respective cylindrical member portions 17, 17, thereby producing a cage member 18 as shown in FIG. 8(D).

(Example 7)

9 to 10 show Embodiment 7 of the present invention. Under the situation of this embodiment, at first, the first step, by punching the part material plate 35 shown in Fig. 9 (A) by double dot chain line by pressing machine, manufactures in Fig. 9 (A) A first intermediate material 36 of the same shape as shown in solid line. This first intermediate material 36 has prefabricated holes 37 which are non-circular, for example square, triangular, arcuate or the like. The reason why the preformed hole 37 is formed non-circular is to facilitate positioning (indexing) with respect to the direction of rotation in a subsequent step. The inner diameter (outer longitude defining the limit of the circle) of this preformed hole 37 is smaller than the inner diameter constituting the rim portion 38 (FIG. 10(C)). In addition, base (pad) parts 39, 39 (parts surrounded by two-dot chain lines on three sides in FIG. The part of the portion 38 is also the part constituting the space between the respective cylindrical member parts 17g, 17g (refer to FIG. 10(C)) approximately half parts (half parts located on the sides of the rim part 38). Also, at a plurality of positions along the circumferential direction of the radially outer end portion of the first intermediate material 36, front half portions (half portions opposite to the rim portion 30) constituting the respective columnar element portions 17g, 17g are respectively formed. The front half 40,40 of the tongue-shaped member.

In the second step performed after the first step, the first radial material 36 is also formed into a shape by drawing processing or the like, wherein the radially intermediate portion of the first intermediate material 36 is The entire circumferential direction is bent at right angles. Then, a second intermediate material 43 as shown in FIG. 9(B) is produced by forming the relevant portion into an L shape on the section constituting the annular portion 41 and the cylindrical portion 42 . The front halves 40 , 40 of the respective tongues become parallel to each other in the state manufactured into the second intermediate material 43 .

In the third step performed after the above-mentioned second step, on the partial cylinder 42 provided on the second intermediate material 43, the nearly half of each cylindrical element part 17g, 17g is forcibly stretched radially outward. Each base portion 39, 39 between the two parts, thereby cutting the two end edge portions in the circumferential direction of each base portion 39, 39 and the two ends of the circumferential direction of the approximately half portion of each cylindrical element portion 17g, 17g part for tearing processing. The tearing process is performed by making the outer peripheral surface of the second intermediate material 43 adjoin a mold (receiving mold) having a concave portion corresponding to each base portion 39,39, and by having a concave portion corresponding to each base portion 39,39. This is achieved by strongly pressing the inner peripheral surfaces of the respective base portions 39, 39 radially outwardly by the punch (die) of the convex portion. Both end edge portions along the circumferential direction of the base portion 39, 39, and both end portions along the circumferential direction of approximately half portions of the respective cylindrical member portions 17g, 17g are mutually torn (sheared), thereby making A third intermediate material 44 as shown in FIG. 9(C) is formed. On this third intermediate material 44 are formed mutually parallel tongues 45 , 45 constituting the respective cylindrical element portions 17 g , 17 g .

In a fourth step performed after the above-mentioned third step, a plurality of pressing portions are provided, for example, toothed pressing jigs of a comb are inserted between the tongues 45 , 45 provided on the third intermediate material 44 . Then, a portion adjacent to a portion of the cylindrical portion 42 in the circumferential direction between the respective tongue portions 45 , 45 is pressed toward the annular portion 41 by the respective pressing portions. The respective base portions 39, 39 are forcibly stretched radially outwards by this press working. At the same time, the surface press work is performed on the portion exposed between the respective tongues 45, 45 at the end edge of the cylindrical portion 42, thereby improving the surface accuracy of this portion. Also, by pressing the cylindrical portion 42 toward the annular portion 41 in the axial direction, the radius of curvature of the continuous portion between the cylindrical portion 42 and the annular portion 41 becomes smaller (the curved portion becomes angled) , thus obtaining the fourth intermediate material 46 as shown in FIG. 10(A).

In the fifth step carried out after the above-mentioned fourth step, the respective base portions 39, 39 which remain on the outer peripheral surface of the fourth intermediate material 46 are cut so as to be cut from the distal end of the cylindrical portion 42 by corrective processing. The edges are removed. In addition, before or after (or at the same time) this correcting work, a circular hole 47 at the center of the ring portion 41 which coincides with the inner diameter of the portion constituting the rim portion 38 is punched out by punching work or the like. A fifth intermediate material 48 is obtained as shown in FIG. 10(B), in which a plurality of tongues 45, 45 parallel to each other protrude from the distal edge of the cylindrical portion 42 constituting the rim portion 38.

In the sixth step performed after the above-mentioned fifth step, each tongue-shaped piece 45, 45 of the fifth intermediate material 48 is subjected to bending processing, thus, each tongue-shaped piece 45, 45 is manufactured into each cylindrical element portion 17g, 17g. That is, undercut molding is performed to form each tongue-shaped piece 45, 45 into a shape in which the middle portion is bent in a crank shape, so that each tongue-shaped piece 45, 45 is manufactured into each cylindrical element portion 17g , 17g, thus manufacturing the cage member 18 shown in FIG. 10(C). As in the case of the above-described embodiment, by arranging the rim portions 38 of the pair of retainer members 18 concentrically with each other, and connecting the distal end portions of the respective cylindrical member portions 17g, 17g to each other, the resulting A pair of cage elements 18 are manufactured as cages for radial needle roller bearings.

Specifically, according to the manufacturing method of this embodiment, since the surface of the cage obtained by fitting together the cage elements 18 in contact with the rolling surfaces of the axial end faces of the needle rollers is pressed by the pressing jig in the fourth step Pressurization of the pressurized part (surface pressing) can improve the properties of the surface. Therefore, damage such as scratches hardly occurs on the surface of the needle roller. In addition, since the radius of curvature of the continuous portion between the cylindrical portion 42 and the rim portion 41 constituting the rim portion 38 can be made small in the fourth step, the axial dimension of the cage can be limited to very small level. As a result, not only improvement in performance (durability, low torque) of a radial needle roller bearing equipped with such a cage can be achieved, but also reduction in size and weight of the radial needle roller bearing can be achieved.

(Embodiment 8)

Fig. 11 shows Embodiment 8 of the present invention. In the case of this embodiment, in carrying out the processing of the above-mentioned embodiment 7, when drawing the flat first intermediate material shown in FIG. 9(A) described above, partly along the column The raised portions 49a, 49b are formed in the circumferential direction of the shaped portion 42 so as to form the second intermediate material shown in FIG. 9(B) of the same structure. Of these raised portions 49a, 49b, the raised portions 49a, 49b bent in mutually opposite directions are manufactured as a pair so that the distal end portion of each cylindrical member portion 17 is radially inward of the rim portion 38. displacement. That is, each raised portion 49a, 49b is formed substantially at a position where both circumferential side edges of the cylindrical member portion 17 are extended. Then, the outer peripheral surface of the outer peripheral surface of the cylindrical part 42 and the part where the cylindrical element part 17 extends is set to be more radially inward than the outer peripheral surface of the cylindrical part 42 to substantially equal to the cylindrical part 42 degrees of thickness.

In the case of this embodiment, by so constituting, at both axial end portions of each cylindrical portion constituting the cylindrical member portion 17g, the portion adjacent to the annular portion 41 of the rim portion 38 Each inclined surface 50a, 50b formed on the inner peripheral surface side of the cylindrical portion 42, that is, each raised portion 49a, 49b is made to be located closer to (slidingly contacting) the roller surface of each needle roller. Therefore, the posture of each needle roller is stabilized (deflection prevented), so that improvement in performance of the radial needle roller bearing is achieved.

In addition, although not shown, in the case of carrying out the above-described Embodiment 7 or Embodiment 8, the cylindrical portion 42 can be made in such a way as to disappear in the area exposed between the respective tongue-shaped pieces 45, 45. part, so that the fifth intermediate material 48 shown in FIG. 10(B) is obtained. In the case where the cylindrical portion 42 is made to disappear in this part, the portion abutting the axial end face of each needle roller is located on the same plane as the annular portion 41, which is in contact with the axial end face of each needle roller. The abutment is in such a state that the cage elements are assembled into a cage. Furthermore, in order to make the cylindrical portion 42 disappear in the aforementioned portion, when the surface stamping work is performed on the portion exposed between the respective tongue-shaped pieces 45, 45, the aforementioned portion is collapsed to be collapsed. Cut off, this part is at the end edge of the cylindrical part 42 of the third intermediate material 44 shown in Figure 9 (C), or, when cutting each base ( pad) portions 39, 39, the part of the cylindrical portion 42 between the tongues is cut to remove, so as to manufacture the fifth intermediate material 48 shown in FIG. 10(B).

In the case of configuring the cage member as described above, the axial end faces of the respective needle rollers can be displaced as far as the position of the inner peripheral surface of the annular portion 41 . In other words, the remaining space between the axial end face of each needle roller and the inner surface of the annular portion 41 is inserted, thus enabling reduction in size and weight of the radial needle roller bearing by reducing its axial dimension .

(Example 10)

12 to 15 show a tenth embodiment of the present invention. It should be noted that the shape of the as-built cage for radial needle roller bearings is basically the same as that of the previously described conventional structure shown in Figures 33 to 35, the difference in the shape of the as-built state being only the relative The cross-sectional shape of each cylindrical portion 12, 12 in a mirror plane that intersects the center line at right angles. This embodiment is characterized in that each cylindrical part 12, 12 is constituted like this, by the proximal end of each cylindrical member part 125, 125 that is connected on the outer peripheral edge of a rim part 11a by each far-end part The proximal portion abuts the outer diameter of the other rim portion 11b closer to its axial side surface and welds the abutment portion. Furthermore, by employing such a structure, not only the roundness of the pair of rim portions 11a, 11b is improved, but also the shape accuracy and dimensional accuracy of each portion are improved, and the cross-sectional shape of each columnar portion 12, 12 with respect to the mirror image plane is formed as Arc shape.

Therefore, in the case of this embodiment, the retainer member 126 constituting one rim portion 11a, and the respective cylindrical portions 125, 125 and the other rim portion 11b are formed by bending and punching a metal plate. manufacture. Among them, the retainer member 126 includes a rim portion 11a formed in a ring shape and a plurality of cylindrical members 125, 125 whose proximal end portions are formed to extend to the rim portion 11a. In the case of this embodiment, a cage element 126 like this is manufactured with the method shown in FIG. 15 . First, a manufacturing method for this cage member 126 will be described. It should be noted that in Fig. 15 above, the circumferential spacing with respect to the respective cylindrical elements 125, 125 and the tongues 122a, 122b constituting the respective cylindrical elements 125, 125 is shown to be shorter than actual.

Initially, a circular material plate 119a shown in FIG. 15(A) is obtained by punching a steel plate or a stainless steel plate constituting the raw material.

Next, the first intermediate material 120a shown in FIG. 15(B) is obtained by punching a portion of the material plate 119a. That is, by punching out the central portion of the material plate 119a in a circular shape, and punching out a portion from the radially intermediate portion to the outer peripheral edge in a notch-like form, a ring constituting one rim portion 11a is formed at the central portion. portion 121a, and form the tongues 122a, 122a constituting each cylindrical element portion 125, 125 to extend radially outwardly at equal intervals from a plurality of positions located along the outer circumferential edge of the annular portion 121a. When the respective cylindrical portions 12, 12 are formed, the protruding portions (refer to FIGS. 14, 34 and 35) constituting the locking protruding portions 15, 15 are formed on the respective tongue-shaped pieces 122a, 122a.

Next, by subjecting the first intermediate material 120a to the step of providing the processing shown in FIG. 15(C), the first intermediate material 120a is manufactured into the second intermediate material 123a. This second intermediate material 123a is formed by bending at two positions on the longitudinal middle portion of the respective tongues 122a, 122a in crank-like fashion in mutually opposite directions on a portion of the first intermediate material 120a. Such processing is carried out in engagement with the sectional shape of the cage 7 of the finished product substantially forming the M shape shown in FIG. 12 and FIGS. 33 to 35 . When this working takes place, the respective tongue pieces 122a, 122a are subjected to press working so that the cross-sectional shape of each tongue piece 122a, 122a in the width direction is formed into a circular arc shape. The radius of curvature of the arcuate shape is controlled in such a way that, in the state of each cylindrical portion 12, 12 formed from each tongue 122a, 122a, the respective cylindrical portion 12, 12 is in a single mirrored cylinder within the shape space. In this way, the processing for obtaining the second intermediate material 123a from the first intermediate material 120a can be easily and very accurately performed by pressing the first intermediate material 120a between a pair of upper and lower dies provided on the punching machine. .

Then, the retainer member 126 is produced by subjecting the second intermediate material 123a to the drawing and bending process shown in FIG. 15(D). This drawing and bending process is carried out like this, by being positioned at the part closer to its outer diameter side along its entire circumference in the axial direction of this ring part 121a (upward in the lower figure of Fig. 15) with each tongue 122a, 122a together bend the annular portion 121a at a right angle until the respective tongues 122a, 122a become substantially parallel to each other. Through such drawing and bending processes, the second intermediate material 123a is produced as a cage element 126 and the respective tongues 122a, 122a are produced as respective cylindrical element parts 125,125.

In order to manufacture the cage of this embodiment, the cage member 126 obtained in the above manner and the other rim portion 11b manufactured by punching a separate metal plate in the shape of a ring as shown in FIGS. It is arranged in such a way that the other rim part 11b and the one rim part 11a constituting the cage element 126 are positioned concentrically with each other. Next, the distal end edge of each cylindrical member portion 125, 125 is brought into abutment with a portion of the axial side surface of the other rim portion 11b located closer to the outer diameter side thereof. The abutment portion is then welded such that the other rim portion 11b and the cage element 126 are mutually engaged and secured to each other. The respective cylindrical element portions 125 , 125 , whose distal end portions are butted with the other rim portion 11 b and further welded, are manufactured as respective cylindrical portions 12 , 12 . Further, portions surrounded on four sides by respective cylindrical portions 12, 12 and two rim portions 11a, 11b adjacent in the circumferential direction form recesses 13, 13, respectively (refer to FIG. 12, FIGS. 33 to 35).

In the case of the cages used for the radial needle roller bearings of the embodiments constructed and manufactured in the above manner, as in Embodiments 1 to 9 that have been described above, due to the following reasons (1) to (5), it is difficult to It is easy to improve the shape accuracy, and the performance of the radial needle roller bearing in which this cage is installed.

(1) Since not only the other rim portion 11b, but also the ring portion 121a of the retainer member 126 constituting one rim portion 11a is produced by punching out the plate-like material plate 19, not only the other rim portion 11b can be raised. The rim portion 11b can also improve the roundness of the rim portion 11a manufactured with the ring portion 121a.

(2) processing for bending the annular portion 121a at a right angle along its entire circumference at a portion of the radially intermediate portion located closer to its outer diameter side, so as to produce the cage member 126 from the second intermediate material 123a, It can be performed with a large force by using a press or the like. Therefore, a rim portion 11a made of the circular rim portion 121a can be easily formed into a correct circular shape, and the entirety of the holder member 126 thus obtained can be formed into a precise circular shape without polygonal shape.

(3) Since the respective cylindrical member portions 125 , 125 constituting the respective cylindrical portions 12 , 12 can be bent in advance, the cross-sectional shape of these respective cylindrical portions 12 , 12 can be formed in a circular arc shape.

(4) The intervals between the cylindrical portions 12, 12 adjacent to each other in the circumferential direction can be made to match each other in a strict manner, so that the cavities 13, 13 formed between the respective cylindrical portions 12, 12 can be Manufactured to match each other exactly.

(5) Since, even in the case where the cross-sectional shape of the retainer 7 is formed into a substantially M shape, the shapes of the respective columnar member portions 125, 125 are never deformed when the rim portion 1a1 is processed, the respective The shape of each cylindrical part 12, 12 manufactured by the cylindrical element part 125, 125 is also never deformed.

Also, in the case of this embodiment, when compared with the embodiment of FIGS. 1 to 9 which have been described previously, a further reduction in production cost can be achieved for the following reason.

First, when the other rim portion 11b is assembled into the cage element 126, only the distal edge portions of the respective cylindrical elements 125, 125 abut against the axial sides of the other rim portion 11b located closer to the outside thereof. part of the diameter. As with the previously described embodiment of FIGS. 1 to 9 , the thin and low stiffness half-cylindrical portions 17, 17 ( Labor time at the far end with reference to FIG. 1) becomes unnecessary. Therefore, the positioning operation can be easily performed, which contributes to the reduction of production costs.

In addition, joint portions associated with welding or the like or existing between the distal end portions of the respective cylindrical member portions 125, 125 and the rolling surfaces (refer to FIG. 33 ) of the needle rollers 6, 6 held in the respective concave cavities 13, 13 The interference between the convex parts on the top needn't be considered too much. That is, the beveled portion whose outer diameter is reduced exists on the outer peripheral edge portion of the shaft end portion of each needle roller 6, 6 facing each engagement portion. Therefore, even if a slight (a small amount of protrusion) convex portion is formed at each joint portion, this does not cause interference of the convex portion with the surface of each needle roller 6, 6. Therefore, the necessity of giving too much attention to avoiding the formation of convex portions at the respective engaging portions is eliminated, and the processing of the respective engaging portions is facilitated to a large extent, whereby cost reduction can be achieved.

(Example 11)

Figures 16 to 21 show Embodiment 11, and it should be noted that this embodiment is characterized by a method and apparatus for manufacturing a cage with good precision for radial needle roller bearings, realizing the use of Figures 16 and 21 The second intermediate material 124 shown in FIG. 17(A) is processed into an undercut shape of the cage element 126 shown in FIGS. 19 and 21 . That is, the present invention is characterized in that the punching process is carried out for longitudinally bending the middle portions of the straight columnar intermediate members 128, 128 parallel to each other constituting the second intermediate material 124a in a cantilever shape, so that Make each cylindrical intermediate portion 128, 128 into each cylindrical member portion 25, 125, while supporting the inner and outer peripheral surfaces of the linear cylindrical intermediate member 128, 128 by a receiving die, and the receiving die is manufactured to be punched After machining, it is separated from the cage element 126 . Since other aspects are similar to Embodiment 10 of the present invention, illustrations and descriptions of similar parts are omitted or simplified. The characteristic portion of this embodiment will be described below.

The second intermediate material 124a is made of, for example, a metal plate such as a steel plate or a stainless steel plate, and has an annular portion 121a constituting a rim portion and respective cylindrical intermediate members 128, 128 from which the circular ring portion 121a is formed. The outer peripheral edge of the ring portion 121a is bent at a right angle to the circular ring portion 121a. The cross-sectional shape with respect to the width direction of these respective cylindrical intermediate members 128, 128 is a circular arc shape, and its shape with respect to the axial direction (longitudinal direction) is a linear shape so that they are parallel to each other. Such a second intermediate material 124a is first placed (set) on the upper surface of the base 130 constituting the press 129 shown in FIG. 17 . The press 129 includes an inner diameter side receiving die 131 and a die 132 in addition to a base 130 . Then, by applying pressure to each cylindrical intermediate member 128 between the outer peripheral surface of the inner diameter side receiving mold 131 and the inner peripheral surface of the mold 132, the longitudinal middle portion of each cylindrical intermediate member 128, 128 is bent, thus The second intermediate material 124a is produced as the third intermediate material 133 shown in FIGS. 17(B) to 17(E). That is, processing is performed to make each cylindrical intermediate member 128, 128 into each second cylindrical intermediate member 138, wherein there is a portion substantially coincident with the outer circumferential portion of the annular portion 121a in the radial direction with respect to the annular portion 121a The proximal portion 134 is made to extend to an intermediate portion 135 and a distal portion 136 present also in a portion radially further inward than the proximal portion 134 of the ring 121a.

A positioning convex portion 139 is formed on the upper surface of the base 130, and the ring portion 121a can be mounted thereon without any looseness. Then, the annular portion 121a is mounted on the positioning convex portion 139, and the second intermediate material 124a is set on the press 129 in a normal positional relationship in such a state that the axial side surface of the annular portion 121a is aligned with the The upper surface of the base 130 is contiguous. When the second intermediate material 124a is set on the press 129 in this manner, as shown in FIG. 17(A), the distal end of the inner diameter side receiving die 131 is inserted into the second intermediate material 124a. It should be noted that the height dimension of the positioning convex portion 139 is made equal to or smaller than (preferably, smaller than) the thickness dimension of the annular portion 121a. Therefore, it does not happen that the upper surface of the annular portion 121 a is located lower than the upper surface of the positioning convex portion 139 .

The inner diameter side necking die 131 includes a base portion 140 and a plurality of convex portions 141 , 141 . Among them, the base portion 140 is formed in a cylindrical shape and the shape of its outer peripheral surface substantially matches the inner peripheral surface of the intermediate portion 135 to the distal end portion 136 of each second cylindrical intermediate member 138 , 138 . That is, considering the springback that each second cylindrical intermediate element 138, 138 works, the outer peripheral surface of the base portion 140 is made into a cylindrical surface, with the ability to process the respective second cylindrical intermediate element 138, 138. The inner peripheral surfaces of the intermediate portion 135 to the distal end portion 136 are dimensioned into a desired shape. Specifically, after completion, the outer diameter of the base portion 140 is manufactured to be slightly smaller (by an amount equal to the springback) of the inscribed circle from the intermediate portion 135 to the distal end portion 136 of each second cylindrical intermediate member 138,138. diameter.

Furthermore, each convex portion 141 , 141 is fixedly arranged (eg integrally molded) on the base portion 140 at the same pitch as each cylindrical intermediate element 128 , 128 and each second cylindrical element 138 , 138 with respect to the circumferential direction. on the outer circumferential surface of the distal portion of the Furthermore, the shape of the outer circumferential surface of the respective convex portion 141 , 141 substantially matches the shape of the inner circumferential surface of the curved portion 137 and the proximal portion 134 of the respective second cylindrical intermediate element 138 , 138 . That is, the shape of the outer peripheral surface of the respective convex portions 141, 141 is made to allow the inner circumference of the proximal end portion 134 and the curved portion 137 of the respective second cylindrical intermediate elements 138, 138 to be operated in consideration of springback during operation. surface. Specifically, after machining, the shape of the outer circumferential surface of each convex portion 141, 141 is made slightly smaller (by an amount equal to the springback) of the proximal portion 134 and the curved portion of each second cylindrical intermediate element 138, 138. 137 inner peripheral surface. In addition, with respect to the circumferential direction of the respective convex portions 141, 141, the width W41 (refer to FIG. 18) is made equal to or greater than the width W38 (refer to FIG. 16) of the respective second cylindrical intermediate elements 138, 138 and equal to or smaller than An interval D38 (W38≦W41≦D38) of the respective second cylindrical intermediate elements 138, 138 adjacent in the circumferential direction. The distal end portion of the inner diameter side receiving mold 131 having such convex portions 141, 141 thereon is inserted into the inside of the second intermediate material 124a in such a state that the respective convex portions 141, 141 are manufactured in phase with The phases of the respective cylindrical intermediate elements 128, 128 coincide.

When the distal end portion of the inner diameter side receiving mold 131 has been inserted into the inside of the second intermediate material 124a in this way, thereafter, as shown in FIG. 17(B), the outer peripheral surfaces of the respective cylindrical intermediate members 128, 128 are The inner peripheral surface of the die 132 is pressed against the outer peripheral surface of the inner diameter side receiving die 131 . The lower end portion of the die 132 on an unillustrated punch (hammer) fixed to the press for raising and lowering is made into a cylindrical shape 142 for inserting the cylindrical middle portion 128, 128 of the second middle material 124a. In each second cylindrical intermediate element 138 , 138 . Then, the inner circumferential surface of this cylindrical portion 142 is shaped substantially in conformity with the outer circumferential surface of the second cylindrical intermediate element 138 , 138 . Specifically, the shape of the inner peripheral surface of this cylindrical portion 142 is slightly smaller than (the amount is equal to the rebound) the proximal end portion 134 and the curved portion 137 outer peripheral surface of each second cylindrical intermediate element 138, 138 obtained after completion. shape.

Furthermore, the inner diameter side receiving mold 131 is supported in such a state that it can be raised and lowered and is given downward elasticity. That is, the base portion 140 of the inner diameter side receiving die 131 is fitted without looseness in the center hole 143 formed in the upper half of the die 132 so as to ascend and descend. In addition, by providing an anti-rotation mechanism (the illustration of which is omitted) such as a keyed engagement between the inner peripheral surface of the central hole 143 and the outer peripheral surface of the base portion 140, by rotation of the mold 132 at a predetermined angle, the inner diameter The side receiving die 131 is also made to rotate by the same angle (or the inner diameter side receiving die 131 is made not to rotate relative to the die 132). Further, a push rod 144 whose lower end portion is fixedly connected to the upper end surface of the radial side receiving die 131 passes through a guide plate 145 fixed to an upper end portion of the die 132 so as to be freely raised and lowered. Also, a pressure spring 148 such as a pressure coil spring is provided between a deeper end surface (lower surface) of a spring case 146 fixed to the top of the guide plate 145 and a spring seat 147 fixedly provided at an upper end portion of the push rod 144. space so as to apply downward elastic force to the inner diameter side receiving mold 131 .

In the state that the mold 132 is pressed downward by the punch, so that the outer cylindrical surface of each cylindrical intermediate element 128, 128 is pressed on the outer cylindrical surface of the inner diameter side receiving mold 131 by the inner peripheral surface of the mold 132, as shown in FIG. 17(B), when elastically compressing the pressure spring 148, the receiving mold 131 on the inner diameter side rises relative to the mold 132 (actually, the receiving mold 131 on the inner diameter side stops at the original position, but only the mold 132 descends ). Therefore, the distal end face (one face) of the inner diameter side receiving mold 131 is pressed toward the upper surface of the base 130 to firmly keep the ring portion 121a fit on the positioning concave portion 139, so as to prevent the ring portion from being included. The second intermediate material 124a of 121a moves suddenly. The cylindrical part 142 that is arranged on the lower half of die 132 descends toward the periphery of second intermediate material 124a, as shown in Figure 17 (B), wherein, the second intermediate material 124a of extruding remains on this base 130 On the surface.

Then, each cylindrical intermediate member 128, 128 is pressed against the outer peripheral surface of the inner diameter side receiving mold 131 by the inner peripheral surface of the cylindrical portion 142, so that each cylindrical intermediate member 128, 128 is inserted into each second column Shaped intermediate elements 138 , 138 , thus this second intermediate material 124 a is produced as a third intermediate material 133 . Specifically, each of these respective second cylindrical intermediate members 138, 138 is formed in a crank shape in cross-section in which there is a portion substantially coincident with the outer circumferential edge of the annular portion 121a with respect to the radial direction of the annular portion 121a. The proximal portion 134 is made to extend to an intermediate portion 135 that exists more inwardly than the radial proximal portion 134 also relative to the annular portion 121a, and to the distal portion 136 via a curved portion 137, thus, made The third intermediate material 133 . In this state, the phases of the convex portions 141 , 141 formed on the outer circumferential surface of the distal end portion (lower end portion) of the inner diameter side receiving mold 131 coincide with the phases of the respective second cylindrical intermediate members 138 , 138 .

Next, the punch that has been lowered is raised so that the die 132 fixed to the lower end portion of the punch is raised halfway, as shown in FIG. 17(C). Specifically, the mold 132 is raised to such an extent that the lower end edge of the mold 132 is positioned higher than the upper end edge of the respective second cylindrical intermediate members 138, 138, under the upper surface of the guide plate 145 and the spring seat 147. A gap remains between the surfaces and is at a temporary standstill.

As shown by arrow α in FIG. 17(D), the inner diameter side receiving mold 131 is rotated by a predetermined angle from this state about the center line β in the vertical direction. It should be noted that only the inner diameter side receiving die 131 is rotated by a predetermined angle by rotating the die 132 by a predetermined angle due to difficulty in rotation. The predetermined angle is half the pitch of the respective second cylindrical intermediate elements 138, 138 (equal to half the pitch of the respective convex portions 141, 141). Therefore, the phases of the respective convex portions 141, 141 and the phases of the respective second columnar intermediate members 138, 138 coincident with each other with respect to the circumferential direction of the ring portion 121a are shifted by a half pitch from each other. In other words, the phase of the concave portions 149 , 149 present between the respective convex portions 141 , 141 coincides with the phase of the respective second cylindrical intermediate elements 138 , 138 . Conversely, the phases of the convex portions 141 , 141 coincide with the phases of the respective gap portions 150 constituting the concave cavities located between the respective second cylindrical intermediate elements 138 , 138 . It should be noted that the machining to make the phases of the parts coincide with each other in the manner described above can also be done by rotating the base 130 through an angle equal to the predetermined angle, wherein the mold 132 is made stationary.

In addition, the structure provided when the inner diameter side receives the mold 131 rotates prevents the third intermediate material 133 from rotating. Although it is arbitrary to provide such a structure, a structure may be considered in which the outer peripheral surface of the third intermediate material 133 and a part of the inner peripheral surface of the mold 132 are engaged convexly and concavely so as to prevent a gap between the third intermediate material 133 and the mold 132. The relative rotation between them (for example, in the case that the mold 132 does not rotate, only the inner diameter side receiving mold 131 rotates). Alternatively, a structure may be adopted in which an irregular joint portion is provided between the third intermediate material 133 and the base 130, and rotation of the inner diameter side receiving mold 131 is prevented (for example, the inner diameter side receiving mold 131 does not rotate while the base 130 spins). In either case, the inner diameter receiving mold 131 or base 130 is rotated through a predetermined angle by means of a suitable oscillating mechanism, wherein a cylindrical or spherical thread type actuator is combined with a crank arm in such a way that the third intermediate Material rotation is restricted.

In any case, when the phases of the respective concave portions 149, 149 and the phases of the respective second cylindrical intermediate elements 138, 138 (the phases of the respective convex portions 141, 141 and the respective gap portions 150) as shown in FIG. 17(E) As shown, when mutually coincident in the above-described manner, the distal end portion of the inner diameter side receiving die 131 is moved from the inside of the third intermediate material 133 as a result of a stamping process performed by a lifting punch. As mentioned above, since the width dimension of each second cylindrical intermediate element 138, 138 is smaller than the width dimension of each gap portion 150 constituting the concave cavity, it does not occur that each second cylindrical intermediate element 138, 138 is distorted due to the moving process. damaged (deformed).

When the third intermediate material 133 has been processed (work) and the inner diameter side receiving mold 131 and the mold 132 have been moved respectively from the inside and the periphery of the third intermediate material 133, so as to be processed in the above-described manner, then, as shown in FIG. 19 As shown, a second stage undercut forming process for forming the third intermediate material 133 into the cage element 126 is performed. In this second-stage undercut forming process, the distal end portion of the inner diameter side receiving die 131 is moved from the inside of the third intermediate material 133, and after the die 132 has been moved from the periphery of the third intermediate material 133, the outer The radial side receiving die 151 is provided on the periphery of the third intermediate material 133, and the second inner radial side receiving die 152 is provided inside the distal end portion of the third intermediate material 133, which is located closer to the ring portion constituting the rim portion. 121a. In addition, when prepared in this way at the end of the second stage and in the forming process, the third intermediate material 133 can be moved onto another base 130, or the base 130 can be kept as it is (without moving the third intermediate material 133 to another base 130), each processing mold provided on the base 130 can be converted. In addition, the operation for setting the second inner diameter side receiving die 152 inside the inner diameter of the third intermediate material 133 is the reverse of the operation for moving the inner diameter side receiving die 131 .

In each of the dies as described above, the outer diameter side receiving die 151 is integrally formed in, for example, a cylindrical shape, and the convex portions 53 and the concave portions 54 are alternately provided on the inner peripheral surface at a portion of its axial middle portion. , the inner circumferential surface faces the outer circumferential surface of the longitudinal middle portion of each second cylindrical intermediate member 138 , 138 at the same pitch as the respective second cylindrical intermediate members 138 , 138 . In addition, the second inner diameter side receiving mold 152 has, for example, a structure similar to the distal end portion of the inner diameter side receiving mold 131, and is supported concentrically with the second mold 155 below the second mold 155 so as to be applied downward. The state of the elastic force and is raised and lowered relative to the second mold 155 in a state preventing it from rotating relative to the second mold 155 . In addition, the outer diameter side receiving die 151 is also supported on the periphery of the second die 155 so as to rise relative to the second die 155 in a state where a downward elastic force is applied and in a state where it is prevented from rotating relative to the second die 155. high and low. Since the joint state between the second die 155 and the second inner diameter side die 152 and the outer diameter side die 151 is substantially similar to the joint state between the inner diameter side receiving die 131 and the die 132, and its structure is very different from FIG. clear, and thus its detailed description is omitted.

When performing the second-stage undercut forming process, since the second inner-diameter side mold 152 and the outer-diameter side mold 151 are arranged at predetermined positions as shown in FIG. Inside the other longitudinal end portion of each second cylindrical intermediate element 138 , 138 . Then, these respective second cylindrical intermediate members 138 , 138 are held between the second die 155 , the outer diameter side receiving die 151 and the second inner diameter side receiving die 152 . By this process, a more distally located curved portion 156 is formed between the intermediate portion 135 and the distal portion 136 of each second cylindrical intermediate member 138, 138 so as to be aligned with the more proximally located curved portion 137. Bend in the opposite direction. As a result, the respective second cylindrical intermediate elements 138 , 138 are machined into the respective cylindrical element portions 125 , 125 and the third intermediate material 133 is manufactured into the cage element 126 .

Thereafter, the base 130 or the second mold 155 is rotated by a predetermined angle so that the phases of the respective concave portions 154 and the phases of the respective cylindrical member portions 125, 125 on the inner circumferential surface of the outer diameter side receiving mold 151 coincide with each other , and thus the second inner diameter side receiving mold 152 is removed from the inside of the cage member 126 . Also, when this occurs, rotation of the cage element 126 that would be caused by rotation of the base 130 or second mold 155 is prevented by a suitable male-female engagement. Afterwards, the retainer element 126 is taken out from the upper surface of the base 130 so as to be assembled with another rim portion 11b shown in FIG. They are then joined and fastened together by suitable means such as welding, soldering, adhesive clamping, etc., in order to manufacture the cage 7 .

In the case of this embodiment, after each cylindrical intermediate element 128, 128 has been bent at a right angle with respect to the circular ring portion 121a, the process for bending the intermediate portion of each cylindrical intermediate element 128, 128 into a crank shape for manufacturing into the machining of each cylindrical element portion 125,125. Accordingly, no bending work of the respective cylindrical element portion 125 , 125 takes place after the middle portion of the respective cylindrical intermediate element 128 , 128 has been bent into a crank shape. That is, unlike the case of Embodiment 1 described above, after the bending into the crank shape is performed, no other bending is performed. Accordingly, the shape of each cylindrical element portion 125, 125 is not deformed in connection with the bending work that would otherwise be performed.

Also, in the case of this embodiment, since the bending work of the bent portion 37 located closer to the proximal end portion is performed in such a state that the inner peripheral surface of each cylindrical intermediate member 128, 128 is punched to be received by the inner diameter side The outer peripheral surface portion of the mold 131 is held, and the bending process of the bent portion 156 located closer to the proximal portion is carried out in such a state that the respective second cylindrical intermediate members 138, 138 extending from the proximal portion thereof to the middle portion The inner and outer peripheral surfaces of the part are punched and respectively held by the part of the inner peripheral surface of the receiving die 151 on the outer diameter side and the part of the outer peripheral surface of the second receiving die 152 on the second inner diameter side, so that the shape accuracy of each curved part 137, 156 can be ensured. Also, each of the receiving molds 131, 151 and 152 can be removed from the inside or periphery of the third intermediate material 133 or from the holder member 126 in such a state that the bending process is completed by rotating them until they are formed on the peripheral surfaces of the respective molds. The phases of the upper concave portion and the phases of the respective cylindrical element portions 125, 125 coincide with each other. Therefore, cages with good quality can be stably obtained through industrial processing capable of mass production.

(Example 12)

22 to 25 show Embodiment 12 of the present invention. In the case of this embodiment, the distal end portion of each cylindrical member portion 125a, 125a fits in a cutout 157, 157 formed on the outer circumferential edge portion of the other rim portion 11b. The radial depth dimension of each cutout 157, 157 relative to the other rim portion 11b is made to coincide with the thickness dimension of each cylindrical member portion 125a, 125a. In the case of this embodiment, the side edges of the distal end portions of each cylindrical element portion 125a, 125a are notched by an amount equal to the thickness of the other rim portion 11b, so that each cylindrical element portion 125a, 125a Narrowed width portions 158, 158 are formed on the distal end portion of the body so as to fit in the respective cutouts 157, 157 without any gap. Since these respective narrowed width portions 158, 158 fit in each of the cutouts 157, 157, at least a part of each narrowed width portion 158, 158, or each narrowed width portion 158, 158 sides and each cutout The inner surfaces of 157, 157 are welded or glued together to connect the distal end portion of each cylindrical member portion 125a, 125a to the other rim portion lib.

In the case of the structure of the present invention constructed as described above, the positioning operation of the distal end portion of each cylindrical member portion 125a, 125a and the outer peripheral edge portion of the other rim portion 11b is easily performed in a fixed manner. That is, the positional relationship between the distal end portion of each cylindrical element portion 125a, 125a and the outer peripheral edge portion of the other rim portion 11b is unconditionally determined with respect to any direction of the circumferential direction, the axial direction, and the radial direction, wherein each The narrowed width portion 158,158 fits in each cutout 157,157. Therefore, the positioning operation is facilitated, and thus the retainer 7 with good precision can be obtained in an assured manner, thus making it possible to achieve cost reduction due to increased production. Furthermore, the respective narrowed width portion 158, 158 does not have to be formed at the distal end portion of the respective cylindrical element portion 125a, 125a, in case the relative axial positioning can be independently controlled by the assembly robot. In this case, the width of each cutout 157, 157 is made to coincide with the width of the distal end portion of the respective cylindrical element portion 125a, 125a.

Since the configuration and function of other parts, including the manufacturing method, etc., are similar to Embodiment 1 or Embodiment 2, repeated similar descriptions are omitted.

(Example 13)

26 to 31 show Embodiment 13 of the present invention. In the case of this embodiment, the distal end portion of each cylindrical member portion 125b, 125b fits in a cutout 157a, 157a formed on the outer circumferential edge portion of the other rim portion 11b. Specifically, in the case of this embodiment, stepped concave portions 159, 159 are formed on the inner peripheral surface of the distal end portion of each cylindrical element portion 125b, 125b, wherein each cylindrical element portion 125a, 125a The longitudinal dimension is equal to the thickness of the other rim portion 11b so as to be radially outwardly recessed. In addition, each notch 157a, 157a formed on the outer peripheral edge portion of the other rim portion 11b is made to have a depth dimension corresponding to the distal end of each cylindrical member portion 125a, 125a with respect to the radial depth dimension of the other rim portion 11b. The thickness dimension of the portion is uniform, and the stepped concave portion 159, 159 is formed on a portion of the distal end portion of each cylindrical member portion 125a, 125a. In addition, since the portion of the distal end portion of the respective cylindrical member portion 125a, 125a on which the stepped concave portion 159, 159 is formed is formed to fit in the respective cutout 157a, 157a, the respective cylindrical member portion The abutment surface between the distal end portion of 125a, 125a and the inner surface of each cutout 157a, 157a is welded or glued together so that the distal end portion of each cylindrical member portion 125a, 125a is connected to the other rim portion 11b .

Also, in the case of the structure of the present invention constructed as described above, as in the case of Embodiment 3 described above, the distal end portions of the respective columnar member portions 125b, 125b and the outer portion of the other rim portion 11b The positioning operation between the peripheral edge portions is easily done in a fixed manner. That is, since the portion of the distal end portion of the respective cylindrical member portion 125a, 125a on which the stepped concave portion 159, 159 is formed is formed to fit in the respective cutout 157a, 157a, the respective cylindrical member portion The positional relationship between 125b, the distal end portion of 125b and the outer peripheral edge portion of the other rim portion 11b is unconditionally determined with respect to any of the circumferential direction, the axial direction and the radial direction. Therefore, the positioning operation is facilitated, and thus the retainer 7 with good precision can be obtained in an assured manner, thus making it possible to achieve cost reduction due to increased production.

Since the configuration and function of other parts, including the manufacturing method, etc., are similar to Embodiment 1 or Embodiment 2, repeated similar descriptions are omitted.

The method for forming the stepped concave portion 159, 159 on the distal end portion of the respective cylindrical member portion 125b, 125b so as to obtain the structure of this embodiment may adopt any method. The stepped concave portion 159, 159 can also be formed by pre-forming a grinding process on the distal end portion of the respective cylindrical element portion 125b, 125b. However, in the case where the stepped concave portions 159 , 159 are formed by press work as shown in FIGS. 30 to 31 , the work operation is easy, and thus cost reduction can be achieved. That is, the tongue-shaped member 122a is bent (the state shown in FIG. 15(B) described above) with respect to the annular ring portion of the one rim portion to form a step-shaped recess formed in a state before the cylindrical member portion 125b. A portion of the distal portion of each tongue 122a of the shaped portion 159 is crushed. Next, as shown in FIG. 31, the portion stretched in the surface direction related to the flattening process is removed (trimmed). The shape of the distal end portion of each of the respective cylindrical element portions 125b, 125b can be produced in this operation to a desired shape as shown in FIG. 29 .

Furthermore, as shown in FIG. 32, the cage is constructed of a pair of cage members 126 in which the respective cylindrical member portions 125c, 125d are provided on the two rim portions 11a, 11b. In this case, the phases of the two rim portions 11a, 11b are made to coincide with each other so that the respective columnar element portions 125c, 125d are alternately arranged at even intervals, and the respective columns forming the rim portion 11a Shaped element portion 125c abuts the axial side surface of the other rim portion 11b at a portion located closer to its outer diameter side, so as to be welded, and also, each cylindrical element portion formed on the other rim portion 11b The distal end edge 125d abuts the axial side surface of the one rim portion 11a at a portion located closer to the outer diameter side thereof to be welded, thereby forming a cage.

This patent application is based on Japanese Patent Application (2005-126768) filed on April 25, 2005 and Japanese Patent Application (2005-325104) filed on November 9, 2005, and the entire contents thereof are hereby incorporated by reference.

Claims (17)

1. the retainer that is used for radial needle bearing, it is by the sheet metal manufacturing, and comprises:

Be arranged on axial two end part so that a pair of round-shaped rim section that is parallel to each other; With

Be arranged in a plurality of cylindrical sections that extend between described two rim section,

Wherein, its four limit is manufactured into the cavity that is used for rollably keeping described needle roller by the part that centers on along the mutually adjacent described cylindrical section of circumferencial direction and two described rim section, and

Wherein, engage with another rim section by distal portions the cartridge by diffusion of volatile treating agent part, the proximal part of described cartridge by diffusion of volatile treating agent part is made into one of them rim section of described two rim section continuous, construct described each cylindrical section, or engage by the distal portions of cartridge by diffusion of volatile treating agent part and its proximal part being made with the continuous cartridge by diffusion of volatile treating agent distal portions partly of another rim section, construct described each cylindrical section.

2. the retainer that is used for radial needle bearing according to claim 1, wherein

Be respectively formed on two described rim section and manufacture crooked edge, spill ground at be connected to each other one of the remote edge of described cylindrical section together of its distal portions, and another remote edge manufactures the crooked edge, convex ground with the crooked edge join in described spill ground, thereby along with the phase place of described each cartridge by diffusion of volatile treating agent part is consistent with each other with respect to the circumferencial direction of described annulus rim section, the remote edge of described each cartridge by diffusion of volatile treating agent part is manufactured into mutual butt joint, and the docking part of described each cartridge by diffusion of volatile treating agent part is welded together.

3. the retainer that is used for radial needle bearing according to claim 1, wherein,

The remote edge that is respectively formed at described each cartridge by diffusion of volatile treating agent part on two described rim section alternately tilts along opposite direction with respect to the circumferencial direction of described rim section and with identical angle, thereby make along the remote edge of inclined and dock mutually, along with the phase place of described each cartridge by diffusion of volatile treating agent part is consistent with each other with respect to the circumferencial direction of described rim section, the docking part of the remote edge of described each cartridge by diffusion of volatile treating agent part welds together.

4. the retainer that is used for radial needle bearing according to claim 1, wherein,

The distal portions that is respectively formed at described each cartridge by diffusion of volatile treating agent part on two described rim section interconnects by convex-concave anastomosis part convex-concave is engaged, and described convex-concave anastomosis part is separately positioned on the inner circumferential surface of described distal portions of the described cartridge by diffusion of volatile treating agent part on the described rim section and on the external peripheral surface of the described distal portions of the above cartridge by diffusion of volatile treating agent part of another rim section.

5. according to any one described retainer that is used for radial needle bearing in the claim 1 to 4, wherein,

The anastomosis part that the distal portions of described therein each cartridge by diffusion of volatile treating agent part is bonded together is set at the position that the rolling surface that remains on the needle roller in each cavity does not contact this anastomosis part.

6. the retainer that is used for radial needle bearing according to claim 1, wherein,

The distal face that is formed on described each cartridge by diffusion of volatile treating agent part on the described rim section is with such state welding or bond to described another rim section, and promptly described distal face manufactures the part on the axial side surfaces of described another rim section that is resisted against more close its outside diameter.

7. the retainer that is used for radial needle bearing according to claim 1, wherein,

The distal portions that is formed on described each cartridge by diffusion of volatile treating agent part on the described rim section is engaged in the otch on the outer circumferential edges part that is formed on described another rim section, and the abutment surface part between the internal surface of the distal portions of described each cartridge by diffusion of volatile treating agent part and described each otch is soldered or bond together.

8. the retainer that is used for radial needle bearing according to claim 1, wherein,

The recessed step-like concave portions of radially outward is formed on the inner circumferential surface of described each cartridge by diffusion of volatile treating agent distal portions partly on the described rim section,

Be arranged in the segment distal part of described each cartridge by diffusion of volatile treating agent part of the position on the periphery of this step-like concave portions, be engaged in the otch on the outer circumferential edges part that is formed at described another rim section,

The surface of rising that is positioned at the end of described step-like concave portions manufactures an axial side surface of described another rim section of butt joint, and

Soldered or bond together between the distal portions of described each cartridge by diffusion of volatile treating agent part and the internal surface of described each otch to the small part abutment surface.

9. radial needle bearing comprises:

Interior ring counterpart, wherein cylindrical inner race is arranged on its external peripheral surface,

Outer shroud counterpart, wherein cylindrical outer-race ball track set within it on the circumferential surface,

Can be rotatably set in a plurality of needle rollers between described inner race and the described outer-race ball track, and

Be used for rotatably keeping the retainer of described each needle roller,

Wherein said retainer is each described retainer that is used for radial needle bearing in the claim 1 to 8.

10. manufacture method that is used for the retainer of radial needle bearing comprises:

In enterprising line bend processing of sheet metal and piercing, so that make the retainer element of a plurality of cartridge by diffusion of volatile treating agent parts that comprise that ring wheel rim part and its proximal part and described rim section are continuous;

The described rim section of described retainer element and a rim section of processing separately are set mutually with one heart; With

The distal portions of described each cartridge by diffusion of volatile treating agent part is engaged with the rim section of described independent processing, or engage with a plurality of cartridge by diffusion of volatile treating agent distal portions partly that its proximal part manufactures the rim section that is connected respectively to independent processing.

11. the manufacture method that is used for the retainer of radial needle bearing according to claim 10, wherein,

By the part circular plate of material is carried out piercing, form annulus part that constitutes rim section and the tongue that constitutes the cartridge by diffusion of volatile treating agent part, described tongue extends radially outwardly from being positioned at along a plurality of positions at the interval that equates of the outer circumferential edges of described annulus part, then

Together with described each tongue, described annulus part axially at the part place that is positioned at more close its outer radial side, crooked described annulus part makes these each tongues be manufactured into the cartridge by diffusion of volatile treating agent part.

12. the manufacture method that is used for the retainer of radial needle bearing according to claim 10, wherein,

By the part circular plate of material is carried out piercing, form the circular port on the internal side diameter that is positioned at the part that constitutes rim section and be positioned at a plurality of pre-manufactured hole parts that are provided with the interval that equates along the periphery of described circular hole, then with respect to circumferencial direction

At crooked described rounded material plate on a direction, so that form the cylindrical part that its distal portions manufactures and constitutes the partial continuous of rim section in the whole circumference of the part between described circular port and the described pre-manufactured hole; Then,

Its part each distal portions from described each pre-manufactured hole part to described cylindrical part that is the described cylindrical part of part and its phase place are mated each pre-manufactured hole part with respect to this circumferencial direction is removed, so that the part between the part that is removed with respect to described circumferencial direction manufactures each cartridge by diffusion of volatile treating agent part.

13. the manufacture method that is used for the retainer of radial needle bearing according to claim 10, wherein,

Make first medium material by the part plate of material is carried out piercing, described first medium material comprises:

At the non-circular pre-manufactured hole of radial center part, its internal diameter is less than the internal diameter of the part that constitutes rim section;

Base portion is in the part that constitutes rim section with constitute the part near the space between half part of each cartridge by diffusion of volatile treating agent part at intermediate portion radially; And

A plurality of circumferential positions on the radial outer end part constitute partly half part far away of the tongue of part far away of described each cartridge by diffusion of volatile treating agent part,

Thereafter, this first medium material radially intermediate portion, radially neutral position place further be bent at it along its whole circumference part, make relevant portion form to constitute the cross section of the L shaped shape of annulus part and cylindrical part, thereby manufacture second medium material

Then, each base portion is forced to leading thread to stretching out, described each base portion is a part that is arranged on the part cylindrical part on described second medium material, and in constituting the part near the space between half part of described each cartridge by diffusion of volatile treating agent part, thereby formation constitutes a plurality of tongues of each cartridge by diffusion of volatile treating agent part, by cutting will the edge section, two end part in the circumferencial direction of described each base portion with separate in described each cartridge by diffusion of volatile treating agent two end edge portion partly near the circumferencial direction of half part, thereby make the 3rd medium material

Then, end edge place at described cylindrical part, to the certain applications surface punch process that is exposed between each tongue, each base portion of described the 3rd medium material forcibly extends radially outwardly simultaneously, and the radius of curvature of the continuous part between described cylindrical part and the described annulus part is manufactured into very little, thereby make the 4th medium material

Then, from described each base portion of the remote edge of described cylindrical part cutting, and coupling constitute rim section the circular hole of internal diameter of part at core by punching, thereby make the 5th medium material, and

Each tongue of described the 5th medium material is bent, thereby manufactures the retainer element with described each cartridge by diffusion of volatile treating agent part.

14. the manufacture method that is used for the retainer of radial needle bearing according to claim 13, wherein

When first medium material is manufactured second medium material, the position that the part of the rising of described relatively circumferencial direction is extended at two circumferential ends edges that are located substantially on described each cartridge by diffusion of volatile treating agent part, circumferencial direction along described cylindrical part partly forms, thereby it is more radially inside that the external peripheral surface of the part of the part external peripheral surface of the described cylindrical part that extends near half part of described each cartridge by diffusion of volatile treating agent part is manufactured into the external peripheral surface that is positioned at than other parts of described cylindrical part.

15. according to each described manufacture method that is used for the retainer of radial needle bearing in the claim 13 to 14, wherein

By end edge place the part that is exposed between described each tongue is carried out surperficial punch process at the described cylindrical part of the 3rd medium material, make and make the 4th medium material, and, with such state, be that each base portion is cut with the distal edge from described cylindrical part and removes, thereby make the 5th medium material, described cylindrical part is removed in the part that is exposed between described each tongue, and the part of utilizing the axial end of its described each needle roller to be made into adjacency is manufactured into the internal surface that is positioned at described annulus part on identical plane.

16. the manufacture method that is used for the retainer of radial needle bearing according to claim 10, wherein

By sheet metal is carried out piercing, form annulus part that constitutes rim section and a plurality of tongues that radially extend from the outer circumferential edges of described annulus part, thereafter,

By crooked and rectangular these each tongues of described annulus part, form the straight line cylindricality intermediary element that is parallel to each other,

Then; On the distal portions of the reception of the internal side diameter on external peripheral surface mould, with the spacing that equates for the middle element of described each cylindricality that will process convex part and concave portions are set alternately; The distal portions of the internal side diameter mould on this external peripheral surface inserts the inside of interior half part of the middle element of these each cylindricalitys with such state; Namely; So that the phase place of element manufactures consistent with each other with respect to described annulus circumferencial direction partly in the middle of the phase place of described each convex part and described each cylindricality

Thereafter, the external peripheral surface of described each cylindricality intermediary element is pressed against described internal side diameter by the inner circumferential surface of a mould and receives on the external peripheral surface of mould, make described each cylindricality intermediary element be manufactured into each second cylindricality intermediary element, wherein be manufactured into by the curved section that is positioned at more close near-end and be connected to distal portions with intermediate portion with respect to the described annulus proximal part that radially is arranged in the part of mating substantially partly with the outer circumferential edges of described annulus part, this intermediate portion is positioned at than the more close internal side diameter of proximal part to the radial direction of distal portions with respect to described annulus part

Thereafter, described internal side diameter receives the described relatively annulus partial rotation of mould, mate mutually with respect to described annulus circumferencial direction partly up to the phase place of described each concave portions and the phase place of described each second intermediary element, and

Then, the distal portions of described internal side diameter reception mould withdraws from from the inside of described each second cylindricality intermediary element.

17. the manufacture method that is used for the retainer of radial needle bearing according to claim 16, wherein,

The described distal portions that receives mould at described internal side diameter after the inside of each second cylindricality intermediary element is withdrawed from,

With such state, be that outside diameter reception mould is arranged on the periphery of described each second cylindricality intermediary element, receive on the mould at described outside diameter, concave portions and convex part is arranged alternately on the part of the external peripheral surface of vertical intermediate portion of the described second cylindricality intermediary element with the spacing identical with the spacing of described each second cylindricality intermediary element, the described second cylindricality intermediary element is within it on the axial intermediate portion on the circumferential surface, and second internal side diameter with structure of the distal portions that is similar to described internal side diameter reception mould receives mould and is set in place in the inside of the longitudinal end of more close described annulus described each second cylindricality intermediary element partly, second mould is entered the inside of another longitudinal end of described each second cylindricality intermediary element forcibly, make described each second cylindricality intermediary element be maintained at described second mould, described outside diameter receives mould and described second internal side diameter receives between the mould, and be formed at the curved section that is bent on the opposite direction of the curved section of more close described near-end between the intermediate portion and distal portions of described each second cylindricality intermediary element at more close far-end, thereby, described each second cylindricality intermediary element is manufactured into the cartridge by diffusion of volatile treating agent part, so that manufacture the retainer element, and thereafter

Described outside diameter receives mould and described retainer element rotates relative to each other, each concave portions on the inner circumferential surface of described outside diameter reception mould and the phase place of described cartridge by diffusion of volatile treating agent part are consistent with each other, so that then, remove described outside diameter from the periphery of described retainer element and receive mould, simultaneously, described second internal side diameter receives mould with respect to described annulus partial rotation, phase place and described cartridge by diffusion of volatile treating agent phase place partly up to each concave portions are consistent with each other with respect to the described circumferencial direction of described annulus part, so that then, described second internal side diameter reception mould withdraws from from the inside of described retainer element.

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