JP2019143758A - Cylindrical rolling bearing and manufacturing method of cage - Google Patents

Abstract

To provide a cylindrical rolling bearing which can increase the number of pieces of rollers without enlarging a bearing size, is high in the stiffness of a cage, and can prevent the damage of a raceway surface and the shortage of an oil film, and a manufacturing method of the cage.SOLUTION: A cylindrical rolling bearing 1 comprises an inner ring 2, a plurality of cylindrical rollers 3 and a cage 4, and assembled into an internal periphery of an outside-diameter side member 5. The inner ring 2 has inside-diameter side collars 2b protruding to an outside-diameter side at both sides of an inner raceway surface 2a in an axial line. The cage 4 has a roller holding part 6 located at an inside-diameter side rather than a pitch circle in an alignment row of the cylindrical rollers 3, and a flange part 7 extending to an outside-diameter side from an axial end of the roller holding part 6. In the roller holding part 6, two cylindrical guided parts 6b located at both sides in the axial direction are connected to each other by a plurality of column parts 6c which are aligned in a circumferential direction. The guided parts 6b at both the sides in the axial direction are guided by external peripheral faces of the inside-diameter side collars 2b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cylindrical roller bearing of a type having no outer ring, for example, a cylindrical roller bearing used for a speed increaser of a wind power generator, and a method of manufacturing a cage for the cylindrical roller bearing.

  Generally, a planetary gear device is used for a speed increaser of a wind power generator. As a bearing for supporting the planetary gear of the planetary gear device, a cylindrical roller bearing having a high load capacity for radial load is mainly used.

  FIG. 13 shows an example of a planetary gear support using a cylindrical roller bearing. In order to reduce the size of the planetary gear support, a cylindrical roller bearing 100 having an outer ring-less structure without an outer ring is used. Specifically, the cylindrical roller bearing 100 includes an inner ring 101, a plurality of cylindrical rollers 102, and a cage 103 that holds the cylindrical rollers 102, and the planetary gear 105 serves as an outer ring. In this example, the two cylindrical roller bearings 100 having the outer ring-less structure are incorporated in the inner periphery of one planetary gear 105.

  By the way, even if the wind turbine generator is increasing in size, the speed increaser is required to be compact and lightweight. The size of the cylindrical roller bearing for the planetary gear device is greatly related as a factor for determining the size of the speed increaser. For this reason, by increasing the load capacity of the cylindrical roller bearing, it is possible to reduce the size of the cylindrical roller bearing, and it is possible to achieve a reduction in the size and weight of the speed increaser.

  However, as shown in the example of FIG. 13, when the column portion 103a of the cage 103 is positioned on the pitch circle (diameter PCD) of the arrangement of the cylindrical rollers 102, a cylinder corresponding to the space in which the column portion 103a is disposed. Space for disposing the rollers 102 is reduced. Therefore, it is difficult to increase the diameter of the cylindrical roller 102 or increase the number of the cylindrical rollers 102, and it is difficult to achieve a high load capacity.

  Therefore, for the purpose of increasing the load capacity of cylindrical roller bearings and rollers with cages, the roller diameter is increased by shifting the radial position of the cage pillars from the pitch circle of the roller arrangement to the inner diameter side or outer diameter side. The number of rollers has been increased (for example, Patent Documents 1 to 4).

JP 2005-98365 A JP 2006-38088 A JP 2009-41642 A JP 2013-185640 A

  In a configuration in which the radial position of the column portion is shifted from the pitch circle of the roller arrangement, generally, when the shift amount is large, the cage is guided to the raceway surface of the raceway (Patent Documents 1, 2, and 4). However, when the cage is guided to the raceway surface of the raceway, there is a concern that the raceway surface is damaged or the oil film is cut.

  In addition, the configuration in which the radial position of the column part is shifted from the pitch circle of the roller arrangement tends to reduce the rigidity of the column part itself and the entire cage because the sectional area of the column part of the cage is relatively narrow. . In particular, in the case of a cage composed of only a cylindrical portion having a pocket (Patent Documents 2 and 3), the rigidity is likely to be further lowered. If the rigidity of the column portion is low, skew of the cylindrical roller is likely to occur, and there is a possibility that the column portion cannot maintain a normal shape due to the stress generated at the base of the column portion.

  FIG. 1 of Patent Document 4 shows a cage in which a flange-shaped ring portion is provided on one side in the axial direction of the column portion in order to improve the strength of the column portion. However, this retainer has a cantilever shape in which the column portion extends in the axial direction from the ring portion, so that it is difficult to increase the rigidity of the column portion, and the force for suppressing the skew of the cylindrical roller is considered to be small.

An object of the present invention is to provide a cylindrical roller bearing which can increase the number of rollers without increasing the bearing size, has high cage rigidity, and can prevent raceway surface damage and oil film breakage.
Another object of the present invention is to provide a manufacturing method capable of efficiently and inexpensively manufacturing a cage used in the cylindrical roller bearing.

A cylindrical roller bearing according to the present invention includes an inner ring having an inner ring raceway surface formed on an outer peripheral surface, a plurality of cylindrical rollers that roll on the inner ring raceway surface, and a cage that holds the plurality of cylindrical rollers.
An outer diameter side raceway surface is formed on the inner circumference surface, and the outer diameter side raceway surface is formed on the inner circumference of an outer diameter side member having an outer diameter side collar protruding from one axial side of the outer diameter side raceway surface to the inner diameter side. The plurality of cylindrical rollers are rolled so that the axial position of the cylindrical rollers is regulated by the outer diameter side collar.
In this cylindrical roller bearing,
Each of the inner rings has an inner diameter side collar that protrudes to the outer diameter side on both axial sides of the inner ring raceway surface,
The cage has a roller holding portion located on the inner diameter side of the pitch circle of the arrangement of the cylindrical rollers, and a flange portion extending from the axial end of the roller holding portion to the outer diameter side,
In the roller holding portion, two cylindrical guided portions located on both sides in the axial direction are connected to each other by a plurality of columns arranged in the circumferential direction, and the plurality of cylindrical rollers are accommodated between the columns. It is a shape that becomes a pocket,
The guided portions on both sides in the axial direction are respectively guided by the outer peripheral surfaces of the inner diameter side collars.

  This cylindrical roller bearing is composed of an inner ring, a cylindrical roller, and a cage, and does not have an independent outer ring as a bearing component. Therefore, the outer diameter of the cylindrical roller bearing is smaller than that of a cylindrical roller bearing having an outer ring. For this reason, the outer diameter side member in which the cylindrical roller bearing is incorporated, for example, a planetary gear can be reduced in size. In addition, since the roller holding portion of the cage is positioned on the inner diameter side of the pitch circle of the cylindrical roller arrangement, the number of rollers can be reduced by reducing the distance between the rollers as compared with the case where the roller holding portion is positioned on the pitch circle. Can be increased. Thereby, the bearing size can be reduced while increasing the load capacity.

  In the cage of this cylindrical roller bearing, during operation, guided portions on both axial sides of the pocket in the roller holding portion are respectively guided by the outer peripheral surface of each inner diameter side collar of the inner ring that is separated from the inner diameter side raceway surface. . That is, the column portion does not contact the inner race side raceway surface of the inner ring. For this reason, damage to the inner diameter side raceway surface and oil film breakage can be prevented.

  In this cage, both ends of the column part are connected to the guided part, and the column part is not cantilevered. Moreover, the flange part extended in the outer-diameter side is provided in the axial direction end of the roller holding | maintenance part. For these reasons, the overall rigidity of the cage is high.

In the cylindrical roller bearing of the present invention, the flange portion of the cage may be provided at axial ends on both sides of the roller holding portion.
In this case, the rigidity of the entire cage is further increased, and the rigidity of the column portion is also increased. Thereby, the skew of a cylindrical roller can be suppressed.

The cylindrical roller bearing of this invention WHEREIN: The notch opened to the outer-diameter side may be formed in the circumferential direction position between the said pockets in the said flange part of the said holder | retainer.
In this case, the oil on the outer side in the axial direction of the cage enters between two adjacent cylindrical rollers through the notch, and spreads well to the contact portion between the inner ring side raceway surface of the inner ring and the cylindrical roller.

In the cylindrical roller bearing according to the present invention, the guided portion of the cage may be inclined so that a clearance between the inner ring side flange of the inner ring and the outer peripheral surface becomes wider as going outward in the axial direction.
In this case, the oil on the outer side in the axial direction of the cage is likely to enter the inner side in the axial direction of the inner brim from the inner ring side collar of the inner ring and the guided portion of the cage. The lubrication performance of the contact portion can be improved.

In the cylindrical roller bearing according to the present invention, the column portion may have a trapezoidal shape in which a cross-section cut by a plane perpendicular to the axial direction has an outer diameter surface as an upper side and an inner diameter surface as a lower side.
In this case, since the cylindrical roller and the column portion are in contact with each other on the surface, the stress at the contact portion is reduced and wear is suppressed.

The cage manufacturing method according to the present invention includes a cylindrical roller holding portion in which a plurality of pockets arranged in the circumferential direction are formed, and a flange portion that extends from the axial end of the roller holding portion to the outer diameter side. Applied to the vessel
The process of forming a plate material as a material into a cylindrical body,
A process of forming an end portion in the axial direction that becomes the flange portion in the cylindrical body on the outer diameter side by a spatula drawing process and forming a flange shape,
A process of machining the pocket by laser machining at a predetermined position in the axial central portion that becomes the roller holding portion in the cylindrical body;
including.

  According to this cage manufacturing method, a spatula drawing process is employed in the process of forming the end of the cylindrical body in the axial direction into a flange shape, thus eliminating the need for a mold. For this reason, if the design is not greatly changed, the design of the cage can be changed without a special manufacturing jig. In addition, since no mold is required, cost can be reduced. In particular, it is advantageous when the cage is produced in small quantities. Furthermore, by processing the pocket by laser processing, the shape of the pocket can be processed freely and easily. Although the cage can be manufactured by shaving, the amount of shaving is large and both material cost and processing cost are high.

The method for manufacturing a cage according to the present invention may include a step of processing the axial end portion of the cylindrical body, on which the spatula drawing is performed, so that the thickness is thinner than others.
If the axial end portion of the cylindrical body is thin, the force for pressing the roller during spatula drawing may be small, and spatula drawing can be performed easily.

  A cylindrical roller bearing of the present invention includes an inner ring having an inner ring raceway surface formed on an outer peripheral surface, a plurality of cylindrical rollers that roll on the inner ring raceway surface, and a cage that holds the plurality of cylindrical rollers. An outer diameter side raceway surface is formed on the peripheral surface, and the outer diameter side raceway surface is disposed on the inner circumference of an outer diameter side member having an outer diameter side collar protruding from one axial side of the outer diameter side raceway surface to the inner diameter side. The plurality of cylindrical rollers are incorporated so that the cylindrical rollers roll and the axial positions of the cylindrical rollers are regulated by the outer diameter side collars, and the inner rings are moved to the outer diameter sides on both axial sides of the inner ring raceway surface. Each of the cages has a protruding inner diameter side collar, and the cage includes a roller holding portion positioned on the inner diameter side of the pitch circle of the arrangement of the cylindrical rollers, and a flange extending from the axial end of the roller holding portion to the outer diameter side. And the roller holding part has two cylindrical shapes located on both sides in the axial direction. The guided portions are connected to each other by a plurality of column portions arranged in the circumferential direction, and the shape between each of the column portions is a pocket for accommodating the plurality of cylindrical rollers, and the guided portions on both sides in the axial direction. Are guided by the outer peripheral surface of each of the inner diameter side collars, the number of rollers can be increased without increasing the bearing size, the rigidity of the cage is high, and damage to the raceway surface and oil film breakage can be prevented. .

  The cage manufacturing method according to the present invention includes a cylindrical roller holding portion in which a plurality of pockets arranged in the circumferential direction are formed, and a flange portion that extends from the axial end of the roller holding portion to the outer diameter side. A process of forming a plate material used as a material into a cylindrical body, and a process of forming an axial end portion serving as the flange portion of the cylindrical body on the outer diameter side by a spatula drawing to form a flange shape; And a process of machining the pockets by laser machining at a predetermined position in the axial central portion that becomes the roller holding portion in the cylindrical body, and thus the cage used for the cylindrical roller bearing is efficiently and inexpensively manufactured. be able to.

It is sectional drawing which shows the use condition of the cylindrical roller bearing which concerns on 1st Embodiment of this invention. It is a perspective view of the cylindrical roller bearing. (A) is sectional drawing of the holder | retainer of the cylindrical roller bearing, (B) is the IIIB-IIIB sectional drawing. FIG. 4 is a partially enlarged view of FIG. It is a perspective view of the retainer. It is explanatory drawing which shows an example of the manufacturing method of a holder | retainer. It is a figure which shows the cross-sectional shape of a part of cylindrical body in one manufacture process of a holder | retainer. It is explanatory drawing of a spatula drawing process. (A) is sectional drawing of the holder | retainer of the cylindrical roller bearing which concerns on 2nd Embodiment of this invention, (B) is the IXB-IXB sectional drawing. It is sectional drawing which shows the use condition of the cylindrical roller bearing which concerns on 3rd Embodiment of this invention. It is sectional drawing of the step-up gear of the wind power generator using the cylindrical roller bearing. It is XII-XII sectional drawing of FIG. It is sectional drawing of the planetary gear support part using a general cylindrical roller bearing.

An embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a sectional view showing a use state of a cylindrical roller bearing according to an embodiment of the present invention, and FIG. 2 is a perspective view of the cylindrical roller bearing. The cylindrical roller bearing 1 holds an inner ring 2 having an inner ring raceway surface 2a (FIG. 1) formed on the outer peripheral surface, a plurality of cylindrical rollers 3 that roll on the inner ring raceway surface 2a, and the plurality of cylindrical rollers 3. The retainer 4 is provided. The inner ring 2 has inner diameter side collars 2b (FIG. 1) projecting to the outer diameter side on both sides in the axial direction of the inner ring raceway surface 2a.

  As shown in FIG. 1, the cylindrical roller bearing 1 is incorporated in the inner periphery of the outer diameter side member 5. The outer diameter side member 5 is a planetary gear used for a speed increaser of a wind power generator, for example. An outer diameter side raceway surface 5a is formed on the inner peripheral surface of the outer diameter side member 5, and each cylindrical roller 3 of the cylindrical roller bearing 1 rolls on the outer diameter side raceway surface 5a. A flange 5b is provided on one side in the axial direction of the outer diameter side member 5 so as to protrude from the inner peripheral surface to the inner diameter side. The collar 5 b abuts on one end face of the cylindrical roller 3, thereby regulating the axial position of the cylindrical roller 3.

3A is a cross-sectional view of the cage 4, FIG. 3B is a IIIB-IIIB cross-sectional view thereof, and FIG. 4 is a partially enlarged view of FIG. 3B. 3A shows a cross section taken along the line IIIA-IIIA of FIG. FIG. 5 is a perspective view of the cage.
The cage 4 includes a cylindrical roller holding portion 6 having a plurality of pockets 6a for accommodating the cylindrical rollers 3, and a pair of annular flange portions 7 extending from both axial ends of the roller holding portion 6 to the outer diameter side. Have Each flange portion 7 extends from the axial end of the roller holding portion 6 to the outer diameter side beyond the pitch circle PC (pitch circle diameter PCD) of the arrangement of the cylindrical rollers 3.

As shown in FIG. 3A, the roller holding portion 6 includes two guided portions 6b facing each other in the axial direction and a plurality of locations in the circumferential direction so as to connect the guided portions 6b. It consists of the provided column part 6c. An opening surrounded by the adjacent column part 6c and both guided parts 6b becomes the pocket 6a. The shape of the pocket 6a is a rectangle. The roller holding portion 6 is entirely located on the inner diameter side of the pitch circle PC.
As shown in FIG. 4, the pillar portion 6c has a trapezoidal shape in which a cross-sectional shape cut by a plane perpendicular to the axial direction has an outer diameter surface as an upper side and an inner diameter surface as a lower side.

[Manufacturing method of cage]
Next, an example of a method for manufacturing the cage 4 will be described with reference to FIGS.
As a material of the cage 4, a circular plate material 10 having a hole 10 a at the center shown in FIG. 6A is used. The plate material 10 is, for example, a steel plate. The steel plate is preferably made of a steel material having a small amount of carbon (0.3% or less).

  First, as shown in FIG. 6B, the plate member 10 is formed from the cylindrical body 11 by, for example, deep drawing.

  Next, as shown in FIG. 6C, the cylindrical body 11 is stepped by a lathe or the like so that the thickness of the axial end portions 11b on both sides is thinner than the axial central portion 11a. In the example of FIG. 6C, the tip portion 11ba of the axial end portion 11b is further thinned. FIG. 7 is a cross-sectional view of a part of the cylindrical body 11 that has been stepped. The axial end portion 11b is a portion that becomes the flange portion 7 when the cage 4 is completed.

  The flange portion 7 is formed as shown in FIG. 6D by bending the axial end portion 11b of the cylindrical body 11 processed as described above toward the outer diameter side by a spatula drawing process. As shown in FIG. 8, the spatula drawing process is performed by pressing a roller R against the axial end portion 11 b of the rotated cylindrical body 11. Since the axial end portion 11b is thin, the force for pressing the roller R is small, and the spatula drawing process can be easily performed. If the thickness of the tip end portion 11ba of the axial end portion 11b is further reduced as in this example, the spatula drawing process can be performed more easily.

  Thereafter, a plurality of pockets 6a aligned in the circumferential direction are processed by laser processing in the axial center portion 11a of the cylindrical body 11. In that case, it processes so that the cross section of the column part 6c may become the said trapezoid shape. Thereby, the retainer 4 is completed. Since the steel material is low in carbon content, laser processing does not cause burning. The processing of the pocket 6a by this laser processing may be performed in a stage before the process of spatula drawing (state shown in FIG. 6C).

  According to the method for manufacturing the cage 4, a spatula drawing process is employed in the process of forming the axial side portion 11b of the cylindrical body 11 into a flange shape, so that a mold is not necessary. Therefore, if the design is not greatly changed, the design of the cage 4 can be changed without a special manufacturing jig. In addition, since no mold is required, cost can be reduced. In particular, it is advantageous when the cage 4 is produced in a small quantity as in the case of a cylindrical roller bearing used in a speed increaser of a wind power generator. Furthermore, by processing the pocket 6a by laser processing, the shape of the pocket 6a can be processed freely and easily. It is possible to manufacture the cage 4 by shaving, but in the shaving, the amount of shaving is large, and both the material cost and the processing cost are high.

[Action / Effect]
The cylindrical roller bearing 1 includes an inner ring 2, a cylindrical roller 3, and a cage 4, and does not have an independent outer ring as a bearing part. Therefore, the outer diameter of the cylindrical roller bearing 1 is smaller than that of a cylindrical roller bearing having an outer ring. For this reason, the outer diameter side member in which the cylindrical roller bearing 1 is incorporated, for example, the planetary gear 5 can be reduced in size. Further, since the roller holding portion 6 of the cage 4 is positioned on the inner diameter side with respect to the pitch circle PC of the arrangement of the cylindrical rollers 3, the distance between the rollers is smaller than when the roller holding portion 6 is positioned on the pitch circle PC. The number of rollers can be increased by narrowing. Thereby, the bearing size can be reduced while increasing the load capacity.

  When the cage 4 of the cylindrical roller bearing 1 is in operation, the guided portions 6b on both sides in the axial direction of the pocket 6a in the roller holding portion 6 have inner diameter side ribs 2b separated from the inner diameter side raceway surface 2a. Are respectively guided by the outer peripheral surface of the. That is, the column portion 6 c does not contact the inner diameter side raceway surface 2 a of the inner ring 2. For this reason, damage to the inner diameter side raceway surface 2a and oil film breakage can be prevented. Moreover, the cylindrical roller 3 and the pillar part 6c contact on the surface by making the cross-sectional shape of the pillar part 6c into the said trapezoid shape. For this reason, the contact stress between the cylindrical roller 3 and the column part 6c is reduced, and wear of the column part 6c can be suppressed.

  In the retainer 4, both ends of the column portion 6c are connected to the guided portion 6b, and the column portion 6c is not cantilevered. Further, flange portions 7 extending to the outer diameter side are provided at axial ends on both sides of the roller holding portion 6. From these things, the rigidity of the whole holder | retainer 4 is high, and the rigidity of the pillar part 6c is also high. Thereby, the skew of the cylindrical roller 3 can be suppressed.

[Second Embodiment]
FIG. 9 shows a second embodiment of the present invention. In this embodiment, the cage 4 is different from that in the first embodiment. In the retainer 4 of this embodiment, a plurality of notches 7 a that open to the outer diameter side are formed at circumferential positions between the pockets 6 a in the flange portion 7. When the notch 7a is formed in this way, the oil on the outside in the axial direction of the cage 4 enters between the two adjacent cylindrical rollers 3 through the notch 7a, and the inner ring raceway surface 2a of the inner ring 2 is obtained. And reaches the contact portion between the cylindrical roller 3 well.

[Third Embodiment]
FIG. 10 shows a third embodiment of the present invention. In this embodiment, unlike the first embodiment, the guided portion 6b of the retainer 4 is inclined in a tapered shape in which the outer diameter dimension increases toward the outer side in the axial direction. That is, the clearance S between the outer peripheral surface of the inner diameter side collar 2b and the guided portion 6b of the cage 4 becomes wider as it goes outward in the axial direction. Thereby, the oil on the axially outer side of the cage 4 easily enters the axially inner side of the inner diameter side collar 2b through the clearance S, and the lubricating performance of the cylindrical roller 3 can be improved.

Although each said embodiment shows the cylindrical roller bearing 1 in which the cylindrical roller 3 is a single row, this invention is applicable also to the double row cylindrical roller bearing in which the cylindrical roller 3 arranges 2 rows or 3 rows or more.
Further, in the cage 4 of each of the above embodiments, the flange portions 7 are provided on both sides in the axial direction of the roller holding portion 6, but in some cases, the flange portion 7 is provided only on one axial side of the roller holding portion 6. It is good also as a structure currently provided.

Next, the speed increaser of the wind power generator in which the cylindrical roller bearing 1 according to any one of the above embodiments is used will be described.
As shown in FIG. 11, the speed increaser 30 of the wind turbine generator increases the rotation of the input shaft 31 and transmits it to the low-speed shaft 32, and increases the rotation of the low-speed shaft 32 and outputs it. And a secondary speed increasing device 35 that transmits to the shaft 34. The input shaft 31 is connected to the main shaft of the windmill, and the output shaft 34 is connected to the generator.

  As shown in FIGS. 11 and 12, the planetary gear device 33 is provided with support shafts 38 at a plurality of locations in the circumferential direction of a rotatable carrier 37, and the planetary gears 39 of the support shafts 38 are interposed via the cylindrical roller bearing 1. It is supported rotatably. The planetary gear 39 is the outer diameter side member 5 in FIGS. 1 and 10. The carrier 37 is provided so as to rotate integrally with the input shaft 31 and is rotatably supported by the casing 43 via bearings 41 and 42 (FIG. 11). Each planetary gear 39 supported by the carrier 37 meshes with an internal ring gear 44 provided in the casing 43 and meshes with an external sun gear 45 provided concentrically with the ring gear 44. The sun gear 45 is provided on the low speed shaft 32. The low speed shaft 32 is rotatably supported by the casing 43 through bearings 47 and 48 (FIG. 11).

  As shown in FIG. 11, the secondary speed increasing device 35 is constituted by a gear train. In the example of FIG. 11, in the secondary speed increasing device 35, the gear 50 fixed to the low speed shaft 32 meshes with the small diameter side gear 52 of the intermediate shaft 51, and the large diameter side gear 53 provided on the intermediate shaft 51 is the output shaft. The gear train meshes with the 34 gears 54. The intermediate shaft 51 and the output shaft 34 are rotatably supported by the casing 43 by bearings 55 and 56 and bearings 57 and 58, respectively.

  The operation of the speed increaser 30 configured as described above will be described. When the input shaft 31 rotates, the carrier 37 integral with the input shaft 31 rotates, and the planetary gears 39 supported at a plurality of locations of the carrier 37 revolve. At this time, the planetary gear 39 revolves while revolving while meshing with the fixed ring gear 44 to cause rotation. The sun gear 45 that meshes with the planetary gear 39 that rotates while revolving rotates at an increased speed relative to the input shaft 31. The rotation of the sun gear 45 is accelerated by the secondary speed increasing device 35 and transmitted to the output shaft 34.

  Although the example which uses the cylindrical roller bearing 1 for the step-up gear 30 of a wind power generator was shown in the above description, this cylindrical roller bearing 1 can be used also for another machine. In that case, the outer diameter side member 5 is a rotating member or a non-rotating member other than the planetary gear 39.

  As mentioned above, although the form for implementing this invention based on embodiment was demonstrated, embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 ... Cylindrical roller bearing 2 ... Inner ring 2a ... Inner diameter side raceway surface 2b ... Inner diameter side collar 3 ... Cylindrical roller 4 ... Cage 5 ... Outer diameter side member 5a ... Outer diameter side raceway surface 5b ... Outer diameter side collar 6 ... Roller holding Part 6a ... Pocket 6b ... Guided part 6c ... Column 7 ... Flange 7a ... Notch 10 ... Plate material 11 ... Cylindrical body 11b ... Axial end PC ... Pitch circle S ... Clearance

Claims (7)

An inner ring having an inner ring raceway surface formed on the outer peripheral surface, a plurality of cylindrical rollers that roll on the inner ring raceway surface, and a cage that holds the plurality of cylindrical rollers,
An outer diameter side raceway surface is formed on the inner circumference surface, and the outer diameter side raceway surface is formed on the inner circumference of an outer diameter side member having an outer diameter side collar protruding from one axial side of the outer diameter side raceway surface to the inner diameter side. In the cylindrical roller bearing incorporated so that the plurality of cylindrical rollers roll and the axial position of the cylindrical rollers is regulated by the outer diameter side collar,
Each of the inner rings has an inner diameter side collar that protrudes to the outer diameter side on both axial sides of the inner ring raceway surface,
The cage has a roller holding portion located on the inner diameter side of the pitch circle of the arrangement of the cylindrical rollers, and a flange portion extending from the axial end of the roller holding portion to the outer diameter side,
In the roller holding portion, two cylindrical guided portions located on both sides in the axial direction are connected to each other by a plurality of columns arranged in the circumferential direction, and the plurality of cylindrical rollers are accommodated between the columns. It is a shape that becomes a pocket,
A cylindrical roller bearing characterized in that guided portions on both sides in the axial direction are respectively guided by outer peripheral surfaces of the inner diameter side collars.   The cylindrical roller bearing according to claim 1, wherein the flange portion of the cage is provided at axial ends on both sides of the roller holding portion.   3. The cylindrical roller bearing according to claim 1, wherein a notch that opens to an outer diameter side is formed at a circumferential position between the pockets in the flange portion of the retainer.   The cylindrical roller bearing according to any one of claims 1 to 3, wherein the guided portion of the cage is a clearance with the outer peripheral surface of the inner diameter side collar of the inner ring as it goes outward in the axial direction. Cylindrical roller bearing that is inclined so that it becomes wider.   5. The cylindrical roller bearing according to claim 1, wherein the pillar portion has a cross-sectional shape cut along a plane perpendicular to the axial direction, the outer diameter surface being an upper side and the inner diameter surface being a lower side. A cylindrical roller bearing with a trapezoidal shape. A method of manufacturing a cage having a cylindrical roller holding portion formed with a plurality of pockets arranged in the circumferential direction, and a flange portion extending from the axial end of the roller holding portion to the outer diameter side,
The process of forming a plate material as a material into a cylindrical body,
A process of forming an end portion in the axial direction that becomes the flange portion in the cylindrical body on the outer diameter side by a spatula drawing process and forming a flange shape,
A process of machining the pocket by laser machining at a predetermined position in the axial central portion that becomes the roller holding portion in the cylindrical body;
A method for manufacturing a cage.   The method for manufacturing a cage according to claim 6, comprising a step of processing the axial end portion of the cylindrical body on which the spatula drawing is performed so that the thickness thereof is thinner than others. Method.

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