WO2011080961A1 - Divided retainer for tapered roller bearing - Google Patents

Abstract

A low cost divided retainer for a tapered roller bearing, free from various problems associated with conventional retainers adapted for use in tapered roller bearings and manufactured by press forming, the problems being those which occur in the manufacture and mounting of the retainers and resulting in high cost. A divided retainer for a tapered roller bearing, formed by combining a large number of segments (21) into an annular shape. A row (33) of the segments is formed by inserting common wires (27, 28) through all the segments (21), the wires (27, 28) are tightened, and both ends of each of the wires (27, 28) are directly or indirectly connected together. As a result, the row (33) of the segments is formed into an annular shape.

Description

Tapered roller bearing split cage

The present invention relates to a roller cage in a tapered roller bearing, particularly to a split type cage.

The tapered roller bearing includes an inner ring, an outer ring arranged concentrically on the outer periphery thereof, a tapered roller interposed between the inner ring and the outer ring, and a cage that holds the rollers at regular intervals in the circumferential direction. (Patent Document 1).

The retainer is provided with a large number of axial pillars between the large-diameter side edge and the small-diameter side edge arranged coaxially, and pockets are formed between the pillars. This cage is generally formed of an iron plate press-molded product, a machined product, or a resin molded product.

Japanese Patent Laid-Open No. 2008-121744 (FIGS. 3 and 4)

Conventional press-molded products require a pressing die when they are manufactured, and when assembling the bearing, the assembly die is used to expand the bottom for assembling the rollers and the caulking process after assembling the rollers. Need to run. Furthermore, it is necessary to manage the contact condition between the rollers and the cage, and to manage the amount by which the rollers and the cage are forcibly fitted to the inner ring, that is, the so-called biting amount. From such a point, in the case of a small lot product, there is a problem that the cost of the retainer for the press-molded product is high.

Therefore, an object of the present invention is to provide a split-type cage that is useful for cost reduction without causing the above-described problems when the cage is manufactured or assembled.

In order to solve the above problems, in a split type cage of tapered roller bearings formed by combining a plurality of cage segments in a ring shape, a segment row is formed by inserting a common wire into all the cage segments. The segment row is formed in an annular shape by directly or indirectly connecting the ends of the wire to the wire.

As a configuration for indirectly connecting the both ends of the wire, there is a configuration in which the ends of the wire are connected to the cage segments at both ends of the segment row, and the cage segments at the both ends are connected.

According to the present invention, the cage segments constituting the split cage are coupled by the wires inserted through all the cage segments, so that the cage segments are dispersed, so-called “unevenness” is prevented. Can do.

In addition, in the case of this invention, the stress concentration normally generated in the pocket portion of the cage is distributed to the wire. For this reason, the number of pockets of the cage can be increased and a large number of rollers can be arranged on the inner ring, so that a high load capacity can be achieved.

Furthermore, there is no need for a bottom expansion process and a caulking process when processing a conventional press-processed product, and material loss is reduced, so that cost can be reduced.

1 is a cross-sectional view of Embodiment 1. FIG. It is a partially-omission perspective view of the same segment row. It is a partially expanded plan view of a segment same as the above. It is sectional drawing of the X1-X1 line | wire of FIG. 3A. It is a top view of the modification 1 of a connection part same as the above. FIG. 4B is a sectional view taken along line bb in FIG. 4A. It is sectional drawing of the state before the crimping of the modification 2 of the connection part same as the above. It is a top view after caulking. It is a top view of the modification 3 of the connection part same as the above. It is a top view of the modification 4 of the connection part same as the above. It is a top view of the modification 5 of the connection part same as the above. FIG. 8B is a partial perspective view of the segment of FIG. 8A. It is sectional drawing of the modification of the butt | matching part same as the above. It is sectional drawing of the modification of the butt | matching part same as the above. It is sectional drawing of the modification of the butt | matching part same as the above. FIG. 6 is a partial plan view before connection of Embodiment 2. It is sectional drawing of the X2-X2 line | wire of FIG. It is a partial cross section figure after a connection same as the above. FIG. 12 is a cross-sectional view taken along line 3-X3 of FIG. FIG. 13B is an arrow view taken along line X4-X4 in FIG. 13A. 6 is a partial plan view of Embodiment 3. FIG. It is sectional drawing of the X5-X5 line | wire of FIG. 14A. It is a top view of a connection member. It is sectional drawing of a connection state same as the above. It is a cross-sectional top view before the connection of the modification 1 of a connection part same as the above. It is the cross-sectional top view after the connection of the modification 1 of a connection part same as the above. FIG. 17B is a cross-sectional view taken along line X6-X6 of FIG. 17A.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[Embodiment 1]
The first embodiment shown in FIGS. 1 to 4 relates to a split-type cage 11 and a tapered roller bearing 12 using the split-type cage 11.

In the tapered roller bearing 12, the outer ring 14, which is the other race ring, is arranged concentrically on the outer periphery of the inner ring 13, which is one of the race rings, and is axially disposed on the outer diameter surface of the inner ring 13 in the axial direction. An inclined inner ring raceway 15 is formed. A small collar portion 16 is formed on the small diameter side of the inner ring raceway 15, and a large collar portion 17 is formed on the large diameter side. An outer ring raceway 18 that is opposed to the inner ring raceway 15 and is inclined in the axial direction is formed on the inner surface of the outer ring 14.

A large number of tapered rollers 19 held by the split cage 11 are interposed between the inner ring raceway 15 and the outer ring raceway 18.

As shown in FIG. 2, the cage segment 21 (hereinafter referred to as “segment 21”) that constitutes the split cage 11 has an annular large-diameter side edge and small-diameter side edge of the split cage 11. A segment large-diameter side edge 22 (hereinafter simply referred to as “large-diameter side edge 22”), a segment small-diameter side edge 23 (hereinafter simply referred to as “small-diameter side edge 23”), and the like. The segment pillar part 24 (henceforth a "pillar part 24" only) formed between the large diameter side edge part 22 and the small diameter side edge part 23 is comprised. The shape of each segment 21 is generally I-shaped, and the material thereof is resin or carbon steel.

Among the segments 21, the two segments 21 sandwiching a wire connecting portion 30 described later are particularly referred to as connecting segments 21-a and 21-b. In these connection segments 21-a and 21-b, the dimensions of the opposing portions of the large-diameter side edge portion 22 and the small-diameter side edge portion 23 are shortened by one half of the interval between the wire connection portions 30 ( 2 and 3).

The large-diameter side edge portion 22 and the small-diameter side edge portion 23 are respectively provided with through holes 25 and 26 in a direction orthogonal to the column portion 24 (see FIGS. 3A and 3B). In a state where the edge 22 and the small-diameter side edge 23 are abutted in the circumferential direction, the through holes 25 and 26 are in communication with each other in the circumferential direction. In this state, pockets 29 are formed between the pillars 24.

Terminal crimping portions 31 and 32 formed by covering a soft metal cylinder are formed at both ends of the wires 27 and 28. As the wires 27 and 28, steel wires such as piano wires and resin wires such as nylon are used.

The diameters of the terminal crimping portions 31 and 32 are formed smaller than the diameters of the through holes 25 and 26, and can pass through the through holes 25 and 26 freely.

When inserting the wires 27 and 28 into the through holes 25 and 26, the segments 21 are previously arranged in an annular shape with a finishing dimension using an appropriate jig. The wires 27 and 28 are formed in a finished length including the terminal crimping portions 31 and 32 at both ends thereof.

The wires 27 and 28 are inserted in order from the one connecting segment 21-a with the terminal caulking portion 31 at the head and through to the other connecting segment 21-b, thereby connecting the connecting segments 21-a and 21-b. All the segments 21 including are penetrated. In this way, the entire segment 21 in the temporarily assembled state in which the wires 27 and 28 are inserted into all the segments 21 is referred to as a segment row 33 (see FIG. 2).

In the segment row 33, the terminal caulking portions 31 and 32 of the wires 27 and 28 are tightened to eliminate the gap between the segments 21, and a pocket 29 is formed between the column portions 24 of the segments 21. Further, the gap of the wire connecting portion 30 generated between the connecting segments 21-a and 21-b is 1 between the column portions 24 of the connecting segments 21-a and 21-b.
The two pockets 29 are drawn to the size that forms them.

As shown in FIG. 2, in the wire connecting portion 30, one end of one wire 27 protrudes from the end face of the connecting segment 21-a, and a terminal caulking portion 32 provided at the tip thereof is connected to the other connecting segment 21-a. It approaches or abuts against the end face of b. Further, the other end portion of the wire 27 protrudes from the end surface of the connection segment 21-b, and a terminal caulking portion 31 provided at the tip thereof approaches or abuts on the end surface of the connection segment 21-a. The same applies to the end of the other wire 28.

The exposed portions of the wires 27 and 28 that support the terminal crimping portions 31 and 32 have portions that overlap when viewed in the axial direction. The overlapping portions are in contact with the terminal crimping portions 31 and 32 and are of a soft cylindrical shape. The connection crimping part 34 is formed by pinching a member and crimping this (refer FIG. 3A). Thereby, each wire 27 and 28 is connected cyclically.

Since the terminal caulking portions 31 and 32 exist on both sides of the connecting caulking portion 34, the wires 27 and 28 are prevented from coming out of the connecting caulking portion 34. Thereby, one pocket 29 is formed even in the portion where the wire connecting portion 30 exists, and the split type retainer 11 in which all the segments 21 are combined in an annular shape is obtained.

In the above description, it has been described that the diameters of the terminal crimping portions 31 and 32 are smaller than the diameters of the through holes 25 and 26. On the contrary, the diameters of the terminal crimping portions 31 and 32 are smaller. It can be great. In that case, only one terminal crimping portion 32 is provided in advance, the other end of the wire on which the terminal crimping portion is not formed is inserted into the through holes 25, 26, and all the segments 21 are inserted. The terminal crimping portion 31 is formed at the end of the tightening.

The divided cage of the first embodiment is as described above, and various examples in which a part thereof is modified will be described below.

Modification 1
As a modified example of the connection structure of the wires 27 and 28, there are those shown in FIGS. 4A and 4B. That is, in this case, the terminal caulking portions 31 and 32 are provided with the arc-shaped concave portion 20, and a part of the wire 27 belonging to the opposite terminal caulking portions 31 and 32 is fitted into the concave portion 20. (See FIG. 4B). According to this structure, it becomes compact with respect to the axial direction of the wire connection part 30 by putting the wire 27 along the recessed part 20. FIG.

Although illustration of the wire 28 is omitted, the connection structure in the wire 27 is the same. Also in the following modified examples, illustration of the wire 28 is omitted, but all are the same as the case of the wire 27.

Modification 2
In the case of FIG. 5A and FIG. 5B, a concave caulking portion 35 is provided at one end portion of the wire 27, and a convex caulking portion 36 is provided at the other end portion. The connection crimping part 37 is formed by caulking the part, and the wire connection part 30 is configured.

Modification 3
In the case of FIG. 6, connecting plates 38 and 39 with holes are attached to both ends of the wire 27 by caulking, and both connecting plates 38 and 39 are connected by bolts and nuts 40 to constitute the wire connecting portion 30. It is.

Modification 4
In the case of FIG. 7, both ends of the wire 27 are connected by inserting loops 41 and 42 provided at both ends of the wire 27 to constitute the wire connecting portion 30.

Modification 5
According to each of the above examples, the wire connecting portion 30 between the segments 21-a and 21-b is exposed to the outside, and if the connection of the wire 27 is loosened, it may protrude to the outer diameter portion of the cage. There is. For this reason, as in Modification 5 shown in FIGS. 8A and 8B, a connecting portion accommodating recess 43 is formed across the abutting portions of the segments 21-a and 21-b. The connecting portion receiving recess 43 is opened in two directions, ie, the other segment 21-a, 21-b side to be abutted and the small diameter side edge portion 23 side, and the wire connecting portion 30 is stored therein. To do.

Modification 6
As shown in FIG. 9A, FIG. 9B, and FIG. 9C, interposing the cushion material 44 such as rubber between the butted end surfaces of the segments 21 is effective for reducing the collision noise between the segments 21. . FIG. 9C shows an example in which a ring-shaped cushion material 44 is used.

[Embodiment 2]
In the split type retainer of the first embodiment described above, the segment rows 33 are formed in an annular shape by directly connecting both ends of the wires 27 and 28. However, the embodiment shown in FIGS. In the case of 2, the segments 27 are formed in an annular shape by indirectly connecting the wires 27 and 28.

As in the case of the first embodiment, a segment row 33 is formed by a large number of I-shaped segments 21, but in this second embodiment, U-shaped connecting segments 45a and 45b are formed at both ends of the segment row 33. Be placed. Among these, one connection segment 45a is provided with a dovetail-shaped connection groove 46 in the length direction on the surface facing the other connection segment 45b. On the opposing surface of the other connection segment 45b, an ant-shaped connection protrusion 47 is provided.

Two recesses 48 are provided in the groove bottom of the connecting groove 46. The terminal caulking portion 49 of the wire 27 is accommodated in one concave portion 48, and the terminal caulking portion 50 of the other wire 28 is accommodated in the other concave portion 48.

In addition, the concave portions 51 are also provided at two locations on the side portion of the connecting ridge 47. The other terminal crimping portion 52 of the wire 27 is accommodated in one recess 51, and the other terminal crimping portion 53 of the wire 28 is accommodated in the other recess 51.

As shown in FIG. 12, both the connecting segments 45a and 45b are connected by fitting the connecting groove 46 and the connecting protrusion 47 in the length direction. At this time, the terminal caulking portions 49, 50, 52, 53 accommodated in the recesses 48, 51 are in a state of being immersed in the recesses 48, 51, respectively, which hinders the connection between the connection groove 46 and the connection protrusion 47. Never come. In addition, since the concave portions 48 and 51 are closed by these couplings, the terminal crimping portion 49 and the like are not pulled out and are fixed in the concave portions 48 and 51.

It should be noted that it is desirable to add an integrated means such as applying an adhesive to the connecting portion between the connecting groove 46 and the connecting protrusion 47 or welding them together.

As described above, the ends of the wires 27 and 28 are connected and fixed to the connecting segments 45a and 45b, respectively, and the connecting segments 45a and 45b are connected to each other, so that both ends of the wires 27 and 28 are connected to the connecting segment 45a. , 45b. As a result, the segment row 33 is formed in an annular shape, and the split type retainer 11 is formed.

As shown in FIGS. 13A and 13B, when the crowning 47a is formed on the end surface of the connecting protrusion 47 in the protruding direction and the crowning 47b is formed on both side surfaces of the connecting protrusion 47 in the length direction, the connecting groove 46 and the connecting protrusion are formed. It is possible to eliminate the backlash between the strip 47.

[Embodiment 3]
Next, in the third embodiment shown in FIGS. 14 and 15, the segment row 33 is formed in an annular shape by indirectly connecting the wires 27 and 28 as in the case of the second embodiment. .

Also in this case, the U-shaped connecting segments 54 a and 54 b are arranged symmetrically at both ends of the segment row 33. A dovetail-like connecting groove 56 is formed in parallel to the width direction of the segment row 33 at the opposing portion of each connecting segment 54a, 54b. Concave portions 48 and 51 are provided in the bottoms of these grooves in the same manner as in the second embodiment (see FIGS. 10 and 11), and terminal crimping portions 49, 50, 52, and 53 are accommodated.

The connecting member 57 interposed between the connecting segments 54a and 54b is formed with ant-like connecting ridges 58 fitted in the connecting grooves 56 on both side edges.

The connecting member 57 is connected to the connecting segments 54a and 54b by inserting connecting ridges 58 on both sides of the connecting member 57 in the width direction of the segment row 33 from one end of the connecting groove 56 (see FIG. 15). A segment row 33 is formed. In this case as well, it is desirable to add an integrated means such as applying an adhesive to the connecting portion between the connecting groove 56 and the connecting protrusion 58 or welding them together.

Modification 1
In the connection structure, the connection protrusions 58 on both sides of the connection member 57 are parallel, and the connection grooves 56 of both connection segments 54a and 54b are also formed in parallel. For this reason, even if the connecting member 57 is inserted, no force is applied to the connecting segments 54a and 54b.

On the other hand, in the case of the first modification shown in FIGS. 16 and 17, a taper gradually approaching the connecting groove 56 of the connecting segments 54a and 54b in the insertion direction of the connecting member 57 is provided. Further, the width of the connection groove 56 is formed larger than the width of the connection protrusion 58. At the beginning of inserting the connecting member 57, the outer side of the connecting protrusion 58 contacts the outer inner surface of the connecting groove 56 as shown in FIG. 17A. At this time, there is a gap between the connecting protrusion 58 and the inner inner surface of the connecting groove 56.

When the connection member 57 is inserted from the above state to the end, as shown in FIG. 17B, the outer inner surface of the connection groove 56 is applied at the tip of the connection protrusion 58 in the direction perpendicular to the insertion direction to connect both sides. The segments 54a and 54b are displaced outward by a fixed amount a. As a result, there is no gap between the segments 21 constituting the segment row 33.

Further, since both end portions of the connecting protrusion 58 are engaged with the outer inner surface and the inner inner surface at both end portions of the connecting groove 56, the connection is performed even when a force in the direction of separating both the connecting segments 54 a and 54 b is applied. It will not come off. Therefore, the segment row 33 can maintain a stable annular shape.

DESCRIPTION OF SYMBOLS 11 Split type retainer 12 Tapered roller bearing 13 Inner ring 14 Outer ring 15 Inner ring raceway 16 Small brim part 17 Large brim part 18 Outer ring raceway 19 Tapered roller 20 Recess 21 Cage segment (segment)
21-a, 21-b Connecting segment 22 Segment large-diameter side edge (large-diameter side edge)
23 Segment small diameter side edge (small diameter side edge)
24 Columns 25, 26 Through-holes 27, 28 Wire 29 Pocket 30 Wire connecting part 31, 32 Terminal crimping part 33 Segment row 34 Connecting crimping part 35 Concave crimping part 36 Convex crimping part 37 Connecting crimping part 38, 39 Connecting plate 40 Bolts / Nuts 41, 42 Loop 43 Connecting portion storing recess 44 Cushion material 45a, 45b Connecting segment 46 Connecting groove 47 Connecting protrusions 47a, 47b Crowning 48 Recess 49 Terminal crimping portion 50 Terminal crimping portion 51 Concavity portion 52 Terminal crimping portion 53 Terminal Caulking portions 54a and 54b Connection segment 56 Connection groove 57 Connection member 58 Connection protrusion

Claims (11)

In the split type cage of tapered roller bearings formed by combining a plurality of cage segments in an annular shape, a segment row is formed by inserting a common wire through all the cage segments, and both ends of the wires are directly connected to each other. A segmented retainer for a tapered roller bearing, wherein the segment row is formed in an annular shape by being connected together or indirectly. The cage segment is a cage in which a required number of axial columns are provided between a large-diameter side edge and a small-diameter side edge arranged on the same axis, and pockets are formed between the columns. 2. The split type retainer for a tapered roller bearing according to claim 1, wherein the split type cage is a shape divided by a plane including a central axis. The cage segment spans the segment large diameter side edge and the segment small diameter side edge constituting the large diameter side edge and the small diameter side edge, and spans between the segment large diameter side edge and the segment small diameter side edge. 3. A cone according to claim 2, comprising a segment post portion, wherein said wires are inserted one by one across the large-diameter side edge and the small-diameter side edge of all the cage segments. Split type cage for roller bearings. The means for directly connecting both ends of the wire is configured to connect the ends of the wires drawn out from the segments at both ends of the segment row. Tapered roller bearing split cage. 5. The storage recess extending between both the cage segments is provided in the cage segments at both ends of the segment row, and the connecting portion of the wire is stored in the storage recess. Split type cage for rolling bearings. The means for indirectly connecting both ends of the wire connects the ends of the wire to the cage segments at both ends of the segment row, and connects the wires by connecting the cage segments at the both ends. The tapered cage of the tapered roller bearing according to claim 2, wherein the cage is indirectly connected via cage segments at both ends. The means for connecting the cage segments at both ends to each other includes a connection concave portion and a connection convex portion that fit into the connection segments at both ends of the segment row. Tapered roller bearing split cage. The means for connecting each end of the wire to the connecting segment is, for the connecting segment having the connecting recess, a terminal caulking portion at one end of the wire in a storage recess provided on the bottom surface of the connecting recess. For the connecting segment having the connecting convex portion, the terminal crimping portion at the other end of the wire is stored in a storing recess provided outside the connecting convex portion. The split type cage for a rolling bearing according to claim 7. 9. The split type cage for a rolling bearing according to claim 7 or 8, wherein the connecting convex portions are crowned to swell in the length direction and width direction of the segment row. The means for connecting the cage segments at both ends includes a connecting member between connecting segments at both ends of the segment row, each connecting segment having an ant-shaped connecting groove facing each other, The connecting member has dovetail-shaped ridges that fit into both of the connecting grooves, and the connecting member is fitted to one end of the connecting groove so that the connecting member extends in the length direction of the connecting groove. 7. The split type cage for a rolling bearing according to claim 6, wherein the connecting segments are connected to each other by being pushed in. 11. The split type cage for a rolling bearing according to claim 10, wherein a taper angle is provided at the groove bottoms of the connecting grooves on both sides so that the interval gradually becomes narrower in the pushing direction of the connecting member.

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