JP2000081041A - Thrust cylindrical roller bearing and holder thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thrust cylindrical roller bearing capable of the smooth housing guide of a holder in which the rattling of the thrust direction of the holder is less even if it is used by a lateral axis. SOLUTION: In this holder 1, plural pockets 9 for holding a roller 7 are arranged in a circumferential direction on a ring shape holder main body 8. A guide projection 11 having a roller guide surface 11a and a claw 12 for stopping the roller drop are provided on the opening edge of the front/back of each pocket 9. The guide projection 11 and claw 12 for stopping the roller drop are provided reversely and altenately per the pocket on the front/back side. The rollers 7 held on the holder 1 are interposed between a pair of track races facing to the facing axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust cylindrical roller bearing which is used for a horizontal shaft and whose retainer serves as a housing guide, and a retainer thereof.

[0002]

2. Description of the Related Art Conventionally, in a thrust cylindrical roller bearing,
A retainer 51 with an outer ring lid shown in FIG. 6 and a lattice type retainer 61 shown in FIG. 7 are used. The retainer 51 with an outer ring lid shown in FIG. 6 includes a retainer body 52 having a pocket 56 for holding a roller 55, an outer ring lid 53 covering the outer periphery thereof, and a rivet 54 for fixing the outer ring lid 53. It is composed of three parts. The lattice type retainer 61 shown in FIG. 7 is an integral type that is milled radially or is end milled into a pocket square hole, and the roller (not shown) accommodated in the pocket 62 is a pillar 63. It is possible to freely enter and exit the cage surface side opposite to the above.

[0003]

As shown in FIG. 8, when a retainer 51 with an outer ring lid is used as a retainer for a bearing 50 provided between a shaft 71 and a step portion of a housing 72 for guiding the housing, The outer ring cover 53 has a hole for the stud 54, and a projection 54a is formed by caulking the hole so that the stud 54 does not come off. For this reason, the uneven portion 54a interferes with the inner diameter surface of the housing 72, so that the cage 51 cannot rotate smoothly, and this type of cage 51 is not suitable for housing guidance. Further, as shown in FIG. 9, when the lattice type cage 61 is used on the horizontal axis, the cage 61
Is not restricted to one side with respect to
The backlash in the thrust direction indicated by arrow a in FIG. Therefore, the lattice type retainer 61 is not suitable for use on the horizontal axis.

SUMMARY OF THE INVENTION An object of the present invention is to provide a thrust cylindrical roller bearing capable of smoothly guiding a cage to a housing and having little play in the thrust direction of the cage even when used on a horizontal axis, and a cage for the thrust. That is. Another object of the present invention is to enable smooth rotation of the rollers.

[0005]

According to a thrust cylindrical roller bearing of the present invention, a roller held by a retainer is interposed between a pair of races facing in the axial direction, and is used for a horizontal shaft. The container is a housing guide, and the retainer has the following configuration. In this cage, a plurality of pockets for holding rollers are provided in a ring-shaped cage body in a circumferential direction. A guide projection having a roller guide surface is provided at one of the opening edges on both sides of the retainer of each pocket, and a roller stopper claw is provided at the other. The guide projections and the stopper nails are provided at opening edges opposite to each other for each pocket at a predetermined arrangement interval. The front side of the cage is any one of the two side surfaces of the cage. According to this configuration, the cage can be formed as an integral type, and uneven portions such as tack holes are not formed on the outer diameter surface, so that smooth housing guidance can be performed. Further, a guide projection having a roller guide surface and a retaining claw are provided at opening edges opposite to each other for each pocket at a predetermined arrangement interval, and the guide projection is provided on both surfaces of the entire retainer. Since it is provided, even if it is used on the horizontal axis, rattling in the thrust direction of the retainer is suppressed. The guide projections have only one side for each pocket, and the other one side has a roller stopper claw. Incorporation is possible, and the rollers are prevented from falling off in the state of the assembled parts of the rollers and the retainer. The roller guide surface is a surface that comes into contact with the rollers and suppresses the rattling of the cage.The roller stopper pawls prevent the rollers from rolling when the assembly part at the cage is not assembled to the raceway. A claw that simply prevents it from falling out of your pocket. `` On the opening edges opposite to each other at the predetermined arrangement interval pockets '' means that the pockets provided with the guide projections on the front side and the pockets provided on the back side are arranged in a circumferential direction with regularity. Means that For example, an arrangement portion in which two pockets provided with the guide projections on the front surface side and two or one pockets provided with the guide projections on the rear surface side are arranged next may be repeated.

In the present invention, the guide projection of the retainer and the stopper may be provided at the opening edges opposite to each other for each pocket. In this way, by providing the guide projections in reverse for each pocket, the contact in the thrust direction between the rollers and the cage is evenly distributed over the entire circumference, and the rattling in the thrust direction is more effectively prevented. I can do it. Further, in the present invention, the roller guide surface of the guide projection of the retainer may be a surface having a shape that comes into contact with the rollers. With such a surface contact, the rollers rotate smoothly.

A cage for a thrust cylindrical roller bearing according to the present invention is a cage for guiding a housing in a thrust cylindrical roller bearing used for a horizontal axis, wherein each ring for holding the rollers is provided in a ring-shaped cage main body. It is provided in the circumferential direction, and has the following configuration. A guide projection having a roller guide surface is provided at one of the opening edges on both sides of the retainer of each pocket, and a roller stopper claw is provided at the other. The guide projections and the stopper nails are provided at opening edges opposite to each other for each pocket at a predetermined arrangement interval. The front side of the cage is any one of the two side surfaces of the cage.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a shaft support structure in which a thrust cylindrical roller bearing 2 according to this embodiment is disposed between a shaft 3 and a housing 4. Thrust cylindrical roller bearing 2
Is a roller in which a roller 7 held by a retainer 1 is interposed between a pair of races 5, 6 facing in the axial direction. One of the bearing rings 5 is disposed in contact with a step surface 3c between the small diameter portion 3a and the large diameter portion 3b of the shaft 3, and the other bearing ring 6 is provided with a step of the housing 4 facing the step surface 3c. It is arranged in contact with the surface 4c. The housing 4 has a small-diameter inner surface 4a and a large-diameter inner surface 4b via a step surface 4c.
Are guided by the large-diameter inner surface 4b.

As shown in FIGS. 2 and 3, the cage 1 is provided with a plurality of pockets 9 for holding rollers 7 arranged in a ring-shaped and flat cage body 8 in a circumferential direction. . The cage body 8 is made of metal such as bearing steel, but may be made of resin. Each pocket 9 is provided at equal intervals. The planar shape of each pocket 9 is formed in a rectangular shape large enough to fit the roller 7, and polishing steals 10 are processed at four corners. A guide projection 11 is formed on the opening edge on one side of the retainer of each pocket 9 from both sides of the pocket, and a roller stopper claw 12 is opposed on both sides of the pocket on the opening edge on the other side. It is formed.

[0010] The guide projections 11 and the stopper claws 12
Is provided on the opposite side of the holder 1 for each pocket. The guide projection 11 serves as a roller guide surface 11a whose surface on the inner side of the pocket is inclined, and the roller guide surface 11a contacts the rollers 7 to prevent rattling of the retainer 1. The roller guide surface 11 a has a shape that comes into contact with the rollers 7. FIG. 5 shows the surface contact portion p. The roller guide surface 11a may be an inclined flat surface or a curved surface such as a concave arc-shaped cross section. The roller stopper claws 12 are attached to the cage 1
However, the pawls prevent the rollers 7 from dropping out of the pockets 9 when the assembled parts 7 are not assembled with the races 5 and 6.

The roller guide projection 11 includes a roller stopper claw 12.
The projecting height is formed higher than the
The interval between the rollers 1 and 11 is smaller than the interval between the roller stopper claws 12 and 12. For this reason, as shown in FIG. 4, when assembling the roller 7 into the pocket 9 of the cage 1, the roller 7 is pushed in from the roller stopper claw 12 side.

According to the thrust cylindrical roller bearing 2 of this construction, the retainer 1 can be formed as an integral type, no studs are required, and the outer diameter surface has no irregularities, so that the guide by the housing 4 can be smoothly performed. Roller guide surface 1 for rattling prevention
Since the pockets 1a are provided alternately upside down for each pocket 9, rattling of the retainer 1 in the thrust direction is suppressed. The roller guide surface 11a rotates smoothly because it comes into surface contact with the rollers 7. Each pocket 9 has a roller guide surface 1
Since the roller stopper claws 12 are provided on the side opposite to the side 1a, the rollers 7 are prevented from falling off from the retainer 1 in a state where the rollers 7 are assembled in the retainer 1, The handling of the assembled parts and the assembling work for the races 5 and 6 are easy.

In the above-described embodiment, only one guide projection 11 and one roller stopper claw 12 of the cage 1 are provided on one side surface of the pocket 9a. The nail 12 may be a plurality of nails divided from each other in the length direction of the pocket 9.

[0014]

The thrust cylindrical roller bearing and its retainer of the present invention are provided with guide projections and stoppers having roller guide surfaces in each pocket of the retainer. , For each pocket at a predetermined arrangement interval,
Since the provision on the front side and the provision on the back side are reversed, smooth guidance of the housing of the cage is possible, and rattling in the thrust direction of the cage can be reduced even when used on the horizontal axis. In the case where the guide projections of the retainer and the stoppers are arranged in reverse for each pocket, rattling can be more reliably prevented. In addition, when the roller guide surface of the cage is formed into a shape that comes into contact with the rollers, smooth rotation of the rollers can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a shaft support structure using a thrust cylindrical roller bearing according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a retainer of the thrust cylindrical roller bearing.

FIG. 3 is a partial sectional view taken along the line III-III in FIG. 1;

FIG. 4 is an explanatory diagram of a method of assembling rollers into a cage.

FIG. 5 is a sectional view showing surface contact at a roller guide surface of a cage.

FIG. 6 is a partial cross-sectional view and a partial side view of a conventional cage with an outer ring lid.

FIG. 7 is a perspective view of a conventional lattice type cage.

FIG. 8 is a cross-sectional view of a shaft support structure using a bearing using a conventional cage with an outer ring lid.

FIG. 9 is a cross-sectional view of a shaft support structure using a bearing using a conventional lattice type cage.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cage 8 ... Cage body 2 ... Thrust cylindrical roller bearing 9 ... Pocket 3 ... Shaft 11 ... Guiding protrusion 4 ... Housing 11a ... Roller guiding surface 5,6 ... Rolling ring 12 ... Roller stopper claw 7 ... Roller

Claims (4)

[Claims] Claims: 1. A pair of races facing in the axial direction,
In a thrust cylindrical roller bearing in which rollers held by a retainer are interposed and used for a horizontal axis and the retainer is used as a housing guide, the retainer is provided on a ring-shaped retainer body,
A plurality of pockets for holding the rollers are arranged in the circumferential direction, a guide projection having a roller guide surface is provided on one of the opening edges on both sides of the cage of each pocket, and a roller stopper claw is provided on the other, and these guides are provided. A thrust cylindrical roller bearing in which projections and retaining pawls are provided at opening edges opposite to each other for each pocket at a predetermined arrangement interval. 2. The thrust cylindrical roller bearing according to claim 1, wherein the guide projections and the roller stopper pawls of the cage are provided at opening edges that are opposite to each other for each pocket. 3. The thrust cylindrical roller bearing according to claim 1, wherein a roller guide surface of the guide projection of the cage has a shape that comes into contact with a roller. 4. A cage for guiding a housing in a thrust cylindrical roller bearing used for a horizontal shaft, wherein a plurality of pockets for holding rollers are provided in a ring-shaped cage main body in a circumferential direction. A guide projection having a roller guide surface is provided on one of the opening edges on both sides of the retainer, and a roller stopper claw is provided on the other side.These guide projections and stoppers are provided for each pocket at a predetermined arrangement interval, A thrust cylindrical roller bearing retainer provided on opening edges that are opposite to each other.