JP2011179610A - Thrust roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thrust roller bearing, preventing damage of a cage by restraining eccentricity of the thrust roller bearing even in the stop state of a rotating shaft. <P>SOLUTION: A columnar roller bearing 11 disposed and held to roll in the circumferential direction by the cage 20 is held by one thrust race 50 and the other thrust race 60 from both sides in the axial direction, the one thrust race 50 is provided with an annular inside diameter flange part 51 disposed in the axial direction at a position on the inside diameter end side of the cage 20, and the other thrust race 60 is provided with an annular outside diameter flange part 61 disposed in the axial direction at a position on the outline end side of the cage 20. A spring part 56, which can be elastically deformed when the compressive load is applied in the radial direction thereto, is disposed at the inner peripheral position in the radial direction of the inside diameter side flange part 51 of the one thrust race 50. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a thrust roller bearing. More specifically, a columnar rolling roller disposed and held by a cage so as to be able to roll in the circumferential direction is sandwiched between two thrust traces from both sides in the axial direction, and the two thrusts One of the races has an annular inner flange on the inner diameter end side of the cage at the position on the inner diameter end side of the cage, and the other thrust trace has an outer edge of the cage. The present invention relates to a thrust roller bearing provided with an annular outer diameter side flange disposed in the axial direction at a position on the side.

  Conventionally, for example, automatic transmissions, air conditioning compressors, and the like are arranged between a housing and a rotating shaft of an automatic transmission, an air conditioning compressor, etc., and have a force (thrust, thrust) acting in the axial direction of the rotating shaft. A thrust roller bearing is assembled as a bearing to be received. This thrust bearing is constituted by a cylindrical rolling roller which is disposed and held by a cage so as to be able to roll in the circumferential direction, and is sandwiched between two thrust traces from both sides in the axial direction. Of the two thrust traces, one thrust trace has an annular inner diameter side flange disposed in the axial direction at a position on the inner diameter end side of the cage, and the other thrust trace has a cage The outer peripheral side flange portion is provided in the axial direction at a position on the outer shape end side.

  In this type of thrust roller bearing, if the amount of eccentricity when the housing and the rotating shaft are eccentric and relatively rotated is large, the distance between the outer diameter side collar part and the inner diameter side collar part of both thrust races becomes narrower and narrower. The part which becomes becomes. And, in the part where the distance between the outer diameter side collar part and the inner diameter side collar part becomes narrow, the cage of the thrust roller bearing is sandwiched between both inner side surfaces of the outer diameter side collar part and the inner diameter side collar part In addition, a radial compressive load acts on the cage, and the cage may be damaged by this compressive load. Here, in order to prevent an excessive radial load (radial compressive load) from acting on the cage, for example, a thrust roller bearing having a structure disclosed in Patent Document 1 is known. In this disclosed thrust roller bearing, the cage is made of a material having elasticity, and a plurality of elastic protrusions are integrated with an outer diameter side end surface and / or an inner diameter side end surface of the cage at intervals in the circumferential direction. Is provided. Thereby, it is the structure which absorbs the compressive load of the radial direction concerning a holder | retainer by elastically deforming an elastic protrusion.

JP 2008-169966 A

  However, since the centrifugal force accompanying the rotation does not act in a state where the rotating shaft is stopped, the two thrust traces and the cage constituting the thrust roller bearing are likely to have large eccentricity with respect to the rotating shaft. Therefore, the possibility that the cage is damaged at the initial stage of rotation of the rotating shaft is further increased. By the way, one of the thrust racer bearings provided with the inner diameter side flange is the most configured among the respective configurations of the thrust roller bearing. As a result of intensive studies, the inventors of the present invention paid attention to the fact that the eccentricity of this one thrust trace and the rotating shaft greatly affects the eccentricity of the entire thrust roller bearing. By suppressing the eccentricity of this one thrust trace and the rotating shaft, it is possible to suppress the eccentricity of the two thrust traces and the cage of the thrust roller bearing even when the rotating shaft is stopped. Generation of a compressive load in the direction can be suppressed, and damage to the cage due to the compressive load can be prevented.

  Thus, the present invention was devised in view of such points, and the problem to be solved by the present invention is to suppress the eccentricity of the thrust roller bearing even in a state where the rotating shaft is stopped. This is to prevent damage.

In order to solve the above problems, the thrust roller bearing of the present invention takes the following means.
First, a thrust roller bearing according to a first aspect of the present invention includes a cylindrical roller that is disposed and held by a cage so as to be able to roll in the circumferential direction, and is sandwiched between two thrust traces from both sides in the axial direction. One of the two lath traces is provided with an annular inner diameter side flange disposed in the axial direction at a position on the inner diameter end side of the cage, The thrust trace is a thrust roller bearing provided with an annular outer diameter side flange disposed in the axial direction at a position on the outer end side of the cage, and the inner diameter side flange of the one thrust trace An elastic deformation means that can be elastically deformed when a compressive load is applied in the radial direction is disposed at the radially inner circumferential position.

  According to the first aspect of the present invention, the elastic deformation that can be elastically deformed when a compressive load is applied in the radial direction to the radially inner peripheral position of the inner diameter side flange of one of the thrust roller bearings in the configuration of the thrust roller bearing. Means are provided. According to this configuration, for example, one of the two thrust traces is disposed on the rotating shaft side, and the other thrust trace is disposed on the housing side of an automatic transmission, an air conditioning compressor, or the like. A state in which an elastic force is applied toward the inner diameter side (rotating shaft) is maintained by the elastic deformation means configured on one thrust trace of the thrust roller bearing, so that the entire thrust roller bearing can be elastically biased outward. it can. For this reason, even when the rotating shaft is stopped, the eccentricity of the thrust roller bearing can be suppressed and damage to the cage can be prevented.

  Next, a thrust roller bearing according to a second invention is the thrust roller bearing according to the first invention, and is an elastic deformation means disposed at the radially inner peripheral position of the inner diameter side flange of the one thrust race. Is a spring structure integrally formed as a form having a spring action from the inner diameter side flange.

  According to the second aspect of the invention, the elastic deformation means is a spring structure that is integrally extended from the inner diameter side flange as a form having a spring action. With this very simple structure of the spring structure, the eccentricity of the thrust roller bearing can be suppressed even when the rotating shaft is stopped, and the cage can be prevented from being damaged. The spring structure is formed together with the production of one of the thrust traces. Therefore, the material cost can be reduced without requiring other components. Further, since the spring structure is integrally extended, the workability of assembling to the rotating shaft is easy, and the work cost of assembling can be reduced.

  In the present invention, by taking the measures of the above inventions, the eccentricity of the thrust roller bearing can be suppressed even when the rotating shaft is stopped, and the cage can be prevented from being damaged.

It is a longitudinal cross-sectional view which shows the thrust roller bearing which concerns on Example 1 of this invention. It is a longitudinal cross-sectional view which shows the relationship between the two thrust traces of the thrust roller bearing which concerns on Example 1 of this invention, a roller, and a holder | retainer. It is a perspective view which shows the elastic deformation means arrange | positioned in the radial direction inner peripheral position of the inner diameter side collar part of one thrust trace of the thrust roller bearing which concerns on Example 1 of this invention. It is a longitudinal cross-sectional view which shows the thrust roller bearing which concerns on Example 2 of this invention. It is a longitudinal cross-sectional view which shows the modification 1 of the thrust roller bearing which concerns on Example 2 of this invention.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

  A first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a thrust roller bearing 10 is disposed between a housing 1 such as an automatic transmission or an air conditioning compressor and a rotary shaft 5 and acts in the axial direction of the rotary shaft 5 (thrust, This is a bearing that receives thrust). The thrust roller bearing 10 is generally composed of a plurality of rollers 11, a cage 20, and two thrust traces including one thrust trace 50 and the other thrust trace 60. In the thrust roller bearing 10, a plurality of columnar rollers 11 arranged and held by a cage 20 so as to be able to roll in the circumferential direction are divided into two thrust traces 50 and 60 of the other thrust trace 60 from both sides in the axial direction. It is configured to be sandwiched by one thrust trace. One thrust trace 50 of the two thrust traces is provided with an annular inner diameter side flange 51 disposed in the axial direction at a position on the inner diameter end side of the cage 20. Further, the other thrust trace 60 is provided with an annular outer diameter side flange 61 disposed in the axial direction at a position on the outer end side of the cage 20.

The roller 11 will be described.
As shown in FIG. 2, the roller 11 is formed in a metal column shape, and is arranged and held so as to be able to roll in the circumferential direction by a cage 20 described later. The roller 11 has a columnar diameter that is set according to a portion to be mounted, and includes a cylindrical roller having a relatively large diameter and a needle roller having a small diameter.

The cage 20 will be described.
As shown in FIG. 2, the retainer 20 connects the inner and outer diameter side annular portions 21, 22 spaced apart from each other by a predetermined distance in the radial direction, and connects both the annular portions 21, 22 and a plurality of rollers. And a plurality of pillars 30 that define a pocket 23 that holds the roll 11 in a rollable manner. The plurality of column portions 30 have a substantially M-shaped vertical cross section, and a radial intermediate portion 31 that protrudes close to the track surface 64 of the other thrust trace 60 (or the track surface 54 of the one thrust trace 50). The radial side portions 33 projecting close to the raceway surface 54 of one thrust race 50 (or the raceway surface 64 of the other thrust race 60), and the radial intermediate portion 31 and the radial side portions 33 are connected. And an inclined connecting portion 34. Note that retaining claws (not shown) for retaining the rollers 11 are formed on opposing surfaces of the radial intermediate portions 31 and the radial side portions 33 of the plurality of column portions 30.

Two thrust traces will be described.
As shown in FIG. 1, this thrust trace has a two-sheet configuration, and a plurality of columnar rollers 11 that are arranged and held by a cage 20 so as to be able to roll in the circumferential direction are arranged on both sides in the axial direction. It is comprised between. In the first embodiment, one thrust trace 50 is disposed on the rotating shaft 5 side of an automatic transmission, an air conditioning compressor, and the like, and the other thrust trace 60 is disposed on the housing 1 side.

As shown in FIGS. 1 and 2, one thrust trace 50 and the other thrust trace 60 are formed by punching a carbon steel plate such as press working, plastic working, or the like.
One thrust trace 50 arranged on the rotating shaft 5 side is formed in an annular shape having an opening through which the rotating shaft 5 can be inserted by punching the inside of the disk-shaped member. The roller 11 is configured as a raceway surface 54 on which the roller 11 can roll by arranging the portion parallel to the axial direction of the roller 11. An annular inner diameter side flange 51 bent in the axial direction is formed at the inner diameter end (position on the inner diameter end side of the cage) of the raceway surface 54. The raceway surface 54 and the inner diameter side flange 51 are formed in a substantially L shape in a cross-sectional view.
The other thrust trace 60 arranged on the housing 1 side is formed in an annular shape having an opening through which the rotary shaft 5 can be inserted by punching the inside of the disk-shaped member. However, the roller 11 is configured as a raceway surface 64 on which the roller 11 can roll. Further, an annular outer diameter side flange 61 bent in the axial direction is formed at the outer diameter end (position on the outer end side of the cage) of the raceway surface 64. The raceway surface 64 and the outer diameter side flange 61 are formed in a substantially L shape in a sectional view.
In addition, as shown in FIG. 2, the outer diameter side flange 61 of the other thrust race 60 and the inner end side flange 51 of the first thrust trace 50 are held at a plurality of circumferential positions. A plurality of retaining claws 52 and 62 for retaining are formed on the inner and outer diameter side end surfaces of the vessel 20 with a predetermined overlap margin as required by caulking or the like.

As shown in FIG. 3, an elastic deformation means that can be elastically deformed when a compressive load is applied in the radial direction is formed at the radially inner peripheral position of the inner diameter side flange 51 of one of the thrust traces 50. ing. In the elastic deformation means in the first embodiment, a spring portion 56 having a spring action is integrally extended from the inner diameter side flange 51. The spring portion 56 is formed by bending a plurality of tongue pieces further extending from the axial end of the inner diameter side flange 51 into a substantially V-shaped cross section (see FIG. 2). This tongue piece is configured by forming incision grooves 57 substantially parallel to the axial direction at equal intervals in the circumferential direction with respect to an annular member extending from the inner diameter side flange 51. Thereby, the tongue pieces are equally arranged and configured in the circumferential direction of the inner diameter side flange portion 51 of one thrust race 50.
As shown in FIG. 2, the spring portion 56 is formed thinner than the plate thickness of one thrust race 50. Preferably, the retainer 20 is bent to be thinner than the plate thickness of the column portion 30. As a result, the spring portion 56 is configured to be elastically deformed before the first thrust trace 50 and the column portion 30.

  According to the thrust roller bearing 10 according to the first embodiment, when a compressive load is applied in the radial direction to the radially inner peripheral position of the inner diameter side flange portion 51 of one thrust race 50 in the configuration of the thrust roller bearing 10. A spring portion 56 is provided as an elastic deformation means capable of elastic deformation. In the state where one of the two thrust traces is disposed on the rotating shaft 5 side and the other thrust trace 60 is disposed on the housing 1 side of an automatic transmission, an air conditioning compressor or the like, the thrust roller bearing 10 A state in which an elastic force is applied toward the inner diameter side (rotating shaft 5) is maintained by the spring portion 56 formed in one of the thrust traces 50. For this reason, the entire thrust roller bearing 10 can be elastically biased outward. Therefore, even when the rotating shaft 5 is stopped, the eccentricity of the thrust roller bearing 10 can be suppressed and damage to the cage 20 can be prevented.

  The elastic deformation means is a spring part 56 that is integrally extended from the inner diameter side flange 51 as a form having a spring action. Therefore, the eccentricity of the thrust roller bearing 10 can be suppressed and damage to the cage 20 can be prevented with an extremely simple structure even when the rotary shaft 5 is stopped. The spring portion 56 is formed together with the manufacturing of one of the thrust traces 50. Therefore, the material cost can be reduced without requiring other components. Moreover, since the spring part 56 is integrally extended, the workability of assembling to the rotating shaft 5 is easy, and the work cost of assembling can be reduced.

Next, a thrust roller bearing 110 according to Embodiment 2 of the present invention will be described with reference to FIG. In addition, the same code | symbol may be attached | subjected to the same component as the said Example 1, and description may be abbreviate | omitted. The same applies to the following embodiments.
As shown in FIG. 4, in the second embodiment, instead of the configuration of the spring portion 56 of the first embodiment, as a separate body at the radially inner peripheral position of the inner diameter side flange 151 of one thrust race 150. A rubber annular member 156 is configured. Further, as illustrated in FIG. 5, Modification 1 constitutes an annular member 156 a made of synthetic resin. Since other configurations of the second embodiment and the first modification are configured in the same manner as the first embodiment, description thereof is omitted.

  In the thrust roller bearing 110 according to the second embodiment (and the first modification) of the present invention configured as described above, a rubber-made gap is formed between the inner diameter side flange portion 151 of one thrust trace 150 and the rotary shaft 5. This is a separate configuration in which an annular member 156 or an annular member 156a made of synthetic resin is interposed. Thereby, it is easy to change the elastic force in accordance with the specifications of the automatic transmission, the air conditioning compressor, and the like. Moreover, since it can be applied to the same configuration as the thrust roller bearing of the conventional configuration, it is convenient.

The present invention is not limited to the first embodiment but can be implemented in various other embodiments.
For example, in the first embodiment, in the configuration of the thrust roller bearing 10, the radial inner peripheral position of the inner diameter side flange portion 51 of one thrust trace 50 can be elastically deformed when a compressive load is applied in the radial direction. The configuration in which the spring portion 56 is provided as the elastic deformation means has been shown. In the second embodiment, the annular member 156 made of rubber has been described. Further, in the first modification, the annular member 156a made of synthetic resin has been described. However, the present invention is not limited to this, and various configurations can be used as long as they can be elastically deformed when a compressive load is applied in the radial direction at the radially inner peripheral position of the inner diameter side flange of one of the thrust traces. Can be applied.
Further, in the first embodiment, the spring portion 56 has a circumferential direction as long as the spring portion 56 is disposed at a position facing the axial center at the radially inner peripheral position of the inner diameter side flange 51 of one thrust race 50. A plurality of them may be formed. Moreover, the thing of the structure formed in the perimeter may be sufficient.

DESCRIPTION OF SYMBOLS 10 Thrust roller bearing 11 Roller 20 Cage 21 Inner diameter side annular part 22 Outer diameter side annular part 23 Pocket 30 Column part 50 One thrust trace 51 Inner diameter side collar part 52 Locking claw 54 Track surface 56 Spring part 57 Cut groove 60 The other Thrust trace 61 Outer diameter side flange 62 Locking claw 64 Track surface

Claims (2)

Column-shaped rolling rollers arranged and held by a cage so as to be able to roll in the circumferential direction are sandwiched between two thrust traces from both sides in the axial direction. Of the two thrust traces, One thrust trace is provided with an annular inner diameter side flange disposed in the axial direction at a position on the inner diameter end side of the cage, and the other thrust trace has a position on the outer end side of the cage. A thrust roller bearing having an annular outer diameter side flange disposed in the axial direction at
A thrust roller bearing characterized in that an elastic deformation means capable of elastic deformation when a compressive load is applied in a radial direction is disposed at a radially inner peripheral position of the inner diameter side flange of the one thrust trace. . The thrust roller bearing according to claim 1,
The elastic deformation means disposed at the radially inner peripheral position of the inner diameter side flange of the one thrust race has a spring structure integrally extending as a form having a spring action from the inner diameter side flange. Thrust roller bearing characterized by that.

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