JP2016176546A - Rolling bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing device which can reassemble a rolling bearing suitable for rotatably supporting a rotary shaft in a housing, and a fixed plate clipping and fixing an outer ring configured on the rolling bearing between a housing inner surface and the rolling bearing device.SOLUTION: A rolling bearing device is equipped with a rolling bearing 11, and a fixed plate 30. An outer ring 14 has a first outer peripheral surface 15, a second outer peripheral surface 16, and a stepped surface 17. The fixed plate 30 has a through-hole 32 inserted in the second outer peripheral surface 16, and an abutting surface 42 abutting on the stepped surface 17. Between an inner peripheral surface 34 of the through-hole 32 and the second outer peripheral surface 16, an elastic body 50 compressed in a diametrical direction between the inner peripheral surface 34 and the second outer peripheral surface 16 is arranged on at least a part in a circumferential direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rolling bearing device.

  2. Description of the Related Art Conventionally, as a rolling bearing device including a rolling bearing that rotatably supports a rotating shaft in a housing and a fixing plate that sandwiches and fixes an outer ring configured as a rolling bearing between the inner surface of the housing, for example, Patent Literature Techniques such as 1 are known. The technique of Patent Document 1 discloses a technique related to a structure in which an outer ring constituting a radial rolling bearing and a fixing plate for holding the outer ring against a holding recess of a housing are combined. Specifically, the fixing plate is formed on the inner peripheral surface of the engagement ring provided on the fixing plate and the engagement ring provided on the fixing plate, in a state of being externally fitted to the small diameter step portion configured on the outer ring. By engaging with the engaging protrusion, the small-diameter stepped portion is prevented from coming off from the fitting hole. By the way, when one of the rolling bearing devices needs to be replaced after assembling the fixed plate and the rolling bearing, it is preferable that the fixed plate and the rolling bearing can be separated and replaced to be reassembled.

JP 2009-30794 A

  However, it is difficult to remove the above-described locking ring after it is fitted on the small-diameter step portion of the outer ring. For this reason, the fixed plate and the rolling bearing are difficult to separate after being assembled. That is, the above configuration has a concern that it is difficult to reassemble the rolling bearing and the fixed plate.

  The present invention was devised in view of the above points, and the problem to be solved by the present invention is between a rolling bearing suitable for rotatably supporting a rotating shaft in a housing and the inner surface of the housing. Thus, a rolling bearing device that can be reassembled with a fixed plate that pinches and fixes an outer ring configured in the rolling bearing is provided.

  In order to solve the above problems, the rolling bearing device of the present invention takes the following means. First, a rolling bearing device according to a first aspect of the present invention sandwiches and fixes an outer ring configured as a rolling bearing between a rolling bearing that rotatably supports a rotating shaft in a housing and an inner surface of the housing. And an outer peripheral surface of the outer ring is formed with a diameter smaller than that of the first outer peripheral surface fitted to the housing, and from the side surface on one axial side of the first outer peripheral surface. A second outer peripheral surface protruding in a direction, and a step surface formed by the first outer peripheral surface and the second outer peripheral surface, and the fixing plate includes a through-hole inserted into the second outer peripheral surface. A contact surface that contacts the step surface, and at least partly in the circumferential direction between the inner peripheral surface and the second outer peripheral surface of the through hole. An elastic body that is radially compressed between the surfaces is disposed.

  According to this, between the inner peripheral surface of the through hole and the second outer peripheral surface, an elastic body that is compressed in the radial direction between the inner peripheral surface and the second outer peripheral surface is disposed at least partially in the circumferential direction. Is done. Thereby, the rolling bearing is assembled to the fixed plate in a state where the elastic body is compressed. Therefore, the rolling bearing device has an interference between the inner peripheral surface and the second outer peripheral surface due to compression of the elastic body. For this reason, the rolling bearing has a configuration that prevents the fixed plate from coming off. The rolling bearing can be detached from the through hole of the fixed plate. Therefore, it can be set as the rolling bearing apparatus which can reassemble a rolling bearing and a fixed plate. Moreover, the vibration of the rotating shaft can be suppressed by disposing the elastic body between the inner peripheral surface and the second outer peripheral surface of the through hole.

  Next, the rolling bearing device according to a second aspect of the present invention is the first aspect, wherein the inner peripheral surface of the through hole includes a facing portion facing the second outer peripheral surface in close proximity, and the elastic body. A compression site for compression is disposed adjacent to the compression site.

  According to this, the inner peripheral surface of the through hole has a facing portion that faces and opposes the second outer peripheral surface separately from the compression portion that compresses the elastic body. Therefore, it is possible to secure a larger contact surface that contacts the step surface of the outer ring. Therefore, in the rolling bearing device, the fixing of the rolling bearing by the fixed plate can be stabilized.

  Next, a rolling bearing device according to a third aspect of the present invention is the first aspect or the second aspect, wherein the elastic body is formed between the inner peripheral surface of the through hole and the second outer peripheral surface. Arranged around the circumference.

  According to this, the elastic body is disposed on the entire circumference between the inner circumferential surface of the through hole and the second outer circumferential surface. Therefore, since the compressive force of the elastic body extends over the entire circumference of the outer ring, it is possible to improve the retaining of the rolling bearing with respect to the fixed plate.

  Next, a rolling bearing device according to a fourth aspect of the present invention is any one of the first to third aspects, wherein the elastic body is an inner peripheral surface side or the second outer peripheral surface side of the through hole. It is comprised integrally with.

  According to this, since the elastic body is configured integrally with the fixed plate or the outer ring, it is possible to suppress an increase in the number of components, reduce component management, and suppress manufacturing costs.

  Next, the rolling bearing device according to a fifth aspect of the present invention is the second aspect, wherein the fixing plate has a triangular plate and the through hole is formed in three locations radially outward of the through hole. A screw hole for fastening and fixing to the housing is formed in the inner peripheral surface of the through hole, and an elastic body is integrally formed between the screw hole and the center of the through hole, respectively. It is comprised as a compression site | part and the said opposing site | part is comprised between each said compression site | part.

  According to this, the compression site | part which compresses an elastic body is arrange | positioned between the screw hole and the center of a through-hole. In other words, the rotation shaft can be stably supported by disposing the compression portion between the rotation shaft supported by the rolling bearing and the screw hole.

  In the present invention, by taking the measures of the above inventions, the outer ring configured as the rolling bearing is sandwiched and fixed between the rolling bearing suitable for rotatably supporting the rotating shaft in the housing and the inner surface of the housing. A rolling bearing device that can be reassembled with the fixed plate can be obtained.

It is a partial cross section figure of the rolling bearing apparatus which supports the edge part of the rotating shaft in Embodiment 1. FIG. It is the expanded sectional view which expanded the II section of FIG. It is a top view of the stationary plate comprised in the rolling bearing apparatus of Embodiment 1. It is the IV-IV sectional view taken on the line of FIG. It is a partial cross section figure of the rolling bearing apparatus which supports the edge part of the rotating shaft in Embodiment 2. FIG. It is a top view of the stationary plate comprised in the rolling bearing apparatus of Embodiment 2. It is the VIIA-VIIA sectional view taken on the line of FIG. 6, and the VIIB-VIIB sectional view. It is a partial cross section figure of the rolling bearing apparatus which supports the edge part of the rotating shaft in Embodiment 3. It is the expanded sectional view which expanded the IX part of FIG.

  Below, Embodiment 1 of the rolling bearing apparatus of this invention is demonstrated using FIGS. The rolling bearing device in the present embodiment will be described by exemplifying a structure that supports an end portion of a rotating shaft of a vehicle transmission.

  As shown in FIG. 1, a housing 2 of a vehicle transmission houses a rotating shaft 6 such as an output shaft, and components of the transmission such as a gear (not shown). The end of the rotating shaft 6 is supported by a rolling bearing unit 10 (rolling bearing device). The rolling bearing unit 10 includes a rolling bearing 11 and a fixed plate 30. A circular holding recess 4 is provided on the inner surface of the housing 2. The end of the rotating shaft 6 is rotatably supported by a rolling bearing 11 such as a deep groove ball bearing in the holding recess 4 (inner surface of the housing 2). The outer ring 14 of the rolling bearing 11 is fitted in the holding recess 4. The outer ring 14 is fixed while being pressed toward the holding recess 4 by the fixing plate 30 (the outer ring 14 is held between the holding recess 4 and the fixing plate 30). Thereby, the rolling bearing 11 is prevented from coming out of the holding recess 4. Further, the end of the rotating shaft 6 is fitted into an inner ring 12 configured in the rolling bearing 11.

  The rolling bearing 11 is a deep groove ball bearing as a so-called radial rolling bearing. The rolling bearing 11 includes an inner ring 12, an outer ring 14, a plurality of rolling elements 18, and a cage 20.

  As shown in FIGS. 1 and 2, the inner ring 12 has an inner ring raceway surface 12 a on the outer peripheral surface. A rotating shaft 6 is fitted on the inner peripheral surface of the inner ring 12. The outer ring 14 has an outer ring raceway surface 14a on the inner peripheral surface. The outer peripheral surface of the outer ring 14 has a first outer peripheral surface 15, a second outer peripheral surface 16, and a step surface 17. The first outer peripheral surface 15 is fitted into the holding recess 4 of the housing 2. The second outer peripheral surface 16 is formed with a smaller diameter than the first outer peripheral surface 15 and protrudes in the same direction from the side surface on one axial side of the first outer peripheral surface 15. The step surface 17 is formed by a difference in diameter between the first outer peripheral surface 15 and the second outer peripheral surface 16. The plurality of rolling elements 18 are disposed between the inner ring raceway surface 12a and the outer ring raceway surface 14a so as to be freely rollable. The rolling element 18 is a ball. The cage 20 is a crown-shaped cage 20 that holds the intervals between the plurality of rolling elements 18. The cage 20 includes a main part 21 and a plurality of pillar parts 24. The main part 21 is formed in an annular shape. The plurality of column portions 24 protrude in the same direction from the side surface on one side in the axial direction of the main portion 21. The plurality of column parts 24 are formed at predetermined intervals in the circumferential direction. Thereby, a pocket (not shown) for accommodating the rolling elements 18 is formed between the column portions 24 adjacent in the circumferential direction. The cage 20 holds a plurality of rolling elements 18 so as to be able to roll from both sides in the axial direction in a state of being spaced apart in the circumferential direction of the inner ring 12, and a plurality of pockets surrounding and holding the rolling elements 18. And a pillar portion formed by combining the portions between the plurality of pockets.

  2 to 4, the fixing plate 30 is a member that holds and fixes the outer ring 14 that constitutes the rolling bearing 11 between the holding recess 4 (housing inner surface). The fixed plate 30 is a triangular flat plate made of a metal plate such as a steel plate. A through-hole 32 that is inserted through the second outer peripheral surface 16 is formed at the center of the fixed plate 30. Screw holes 40 for fastening and fixing to the housing 2 are formed at three locations radially outward of the through holes 32.

  An elastic body 50 that is compressed in the radial direction is disposed between the inner peripheral surface 34 of the through hole 32 and the second outer peripheral surface 16. The rolling bearing unit 10 has a tightening margin 52 between the inner peripheral surface 34 and the second outer peripheral surface 16 by compression of the elastic body 50. The elastic body 50 in the present embodiment has an interference 52 with respect to the outer diameter 16D of the second outer peripheral surface 16. The elastic body 50 is integrally configured by being bonded to the inner peripheral surface 34 side of the through hole 32. The elastic body 50 is disposed on the entire circumference between the inner circumferential surface 34 of the through hole 32 and the second outer circumferential surface 16. For the elastic body 50, for example, synthetic rubber such as nitrile rubber and acrylic rubber, natural rubber, soft synthetic resin, and the like can be appropriately selected. The elastic body 50 is configured to increase the fixing force after fitting the second outer peripheral surface 16 of the outer ring 14 into the through hole 32. That is, the fastening allowance 52 refers to a portion where the inner diameter 50D of the elastic body 50 in the free state and the outer diameter 16D of the second outer peripheral surface 16 overlap. The elastic body 50 is compressed in the radial direction when the second outer peripheral surface 16 of the outer ring 14 is fitted into the through hole 32 of the fixing plate 30. Here, the tightening allowance 52 is set so that the rolling bearing 11 has a fixing force that does not come off the fixing plate 30 due to its own weight. The fixing plate 30 has a contact surface 42 that comes into surface contact with the stepped surface 17 in a state where the elastic body 50 is compressed.

  As shown in FIGS. 1, 2, and 4, the outer ring 14 of the rolling bearing unit 10 is in contact with the stepped surface 17 by inserting the second outer peripheral surface 16 into the through hole 32 of the fixed plate 30 while compressing the elastic body 50. It is inserted to the position. The outer ring 14 and the fixing plate 30 of the rolling bearing unit 10 are fitted to the position where the first outer peripheral surface 15 is inserted into the holding recess 4 of the housing 2 and the contact surface 42 contacts the edge 5 of the holding recess 4. Then, a fixing component 7 such as a bolt is fastened to the screw hole 40 of the fixing plate 30 and fixed to the housing 2. The outer ring 14 and the fixed plate 30 in the state of the rolling bearing unit 10 have a degree of freedom in the rotation direction. This is because the rolling bearing unit 10 allows the screw hole 40 to be aligned with the mounting hole 3 of the housing 2 by rotating the fixing plate 30 when the outer ring 14 and the fixing plate 30 are assembled to the holding recess 4 of the housing 2. Because.

  Thus, according to the rolling bearing unit 10 of the first embodiment, at least part of the inner circumferential surface 34 and the second outer circumferential surface are disposed between the inner circumferential surface 34 and the second outer circumferential surface 16 of the through hole 32. An elastic body 50 that is radially compressed between the surfaces 16 is disposed. Thereby, the rolling bearing 11 is assembled to the fixed plate 30 in a state where the elastic body 50 is compressed. Therefore, the rolling bearing unit 10 has the interference 52 between the inner peripheral surface 34 and the second outer peripheral surface 16 due to the compression of the elastic body 50. That is, the elastic body 50 according to the first embodiment has a fastening allowance 52 for the outer diameter 16D of the second outer peripheral surface 16. Therefore, the rolling bearing 11 has a configuration that prevents the fixed plate 30 from coming off. Further, the rolling bearing 11 can be detached from the through hole 32 of the fixed plate 30. Therefore, the rolling bearing unit 10 in which the rolling bearing 11 and the fixed plate 30 can be reassembled can be obtained. In addition, since the elastic body 50 is disposed between the inner peripheral surface 34 of the through hole 32 and the second outer peripheral surface 16, vibration of the rotating shaft 6 can be suppressed.

  The elastic body 50 is disposed on the entire circumference between the inner circumferential surface 34 of the through hole 32 and the second outer circumferential surface 16. Therefore, since the compressive force of the elastic body 50 extends over the entire circumference of the outer ring 14, it is possible to improve the prevention of the rolling bearing 11 from coming off from the fixed plate 30.

  In addition, the elastic body 50 is configured integrally with the fixed plate 30 or the outer ring 14, thereby suppressing an increase in the number of components, reducing component management, and suppressing manufacturing costs.

  Next, Embodiment 2 will be described with reference to FIGS. In addition, about the structure substantially the same as the above-mentioned embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. The following embodiments are also the same. In the above-described first embodiment, the elastic body 50 configured in the fixed plate 30 is an aspect that is disposed on the entire circumference of the inner peripheral surface 34 of the through hole 32. The rolling bearing unit 210 (rolling bearing device) in the second embodiment is an aspect in which the elastic body 250 of the fixed plate 230 is formed in a part of the circumferential direction.

  The fixing plate 230 has a through hole 232 formed in a triangular flat plate. Screw holes 240 for fastening and fixing to the mounting holes 3 of the housing 2 are formed at three locations radially outward of the through holes 232. On the inner peripheral surface 234 of the through hole 232, an elastic body 250 is integrally formed between the screw hole 240 and the center 232C of the through hole 232, respectively. That is, the elastic body 250 is disposed at three locations in the circumferential direction on the inner peripheral surface 234 of the through hole 232. Here, the inner peripheral surface 234 of the through-hole 232 is partially cut away radially outward from the portion where the elastic body 250 is disposed. Such a part is configured as a compression part 238 that compresses the elastic body 250. Further, between the respective compression sites 238 in the circumferential direction of the through hole 232, an opposing site 236 that is opposed to the second outer peripheral surface 16 is formed. An inner diameter 236 </ b> D of the facing portion 236 is a diameter at which the contact surface 242 contacts the stepped surface 17 of the outer ring 14 and is larger than the outer diameter 16 </ b> D of the second outer peripheral surface 16. That is, the facing portion 236 is closer to the second outer peripheral surface 16 than the compression portion 238. The inner diameter 236D of the facing portion 236 and the outer diameter 16D of the second outer peripheral surface 16 may be substantially the same diameter. Therefore, the inner peripheral surface 234 of the through-hole 232 is alternately arranged with opposing portions 236 that face each other close to the second outer peripheral surface 16 and compression portions 238 that compress the elastic body 250 adjacent to each other in the circumferential direction. Is done. Here, the elastic body 250 in the second embodiment has an interference 252 with respect to the outer diameter 16D of the second outer peripheral surface 16. That is, the rolling bearing unit 210 has a tightening margin 252 between the compression portion 238 that compresses the elastic body 250 and the second outer peripheral surface 16. The fastening allowance 252 indicates a portion where the inner diameter 250D of the elastic body 250 in the free state and the outer diameter 16D of the second outer peripheral surface 16 overlap.

  Thus, according to the rolling bearing unit 210 of the second embodiment, the same function and effect as those of the first embodiment described above are obtained. Furthermore, the inner peripheral surface 234 of the through-hole 232 has a facing portion 236 that faces and opposes the second outer peripheral surface 16 separately from the compression portion 238 that compresses the elastic body 250. Therefore, a larger contact surface 42 that contacts the step surface 17 of the outer ring 14 can be secured. Therefore, in the rolling bearing unit 210, the fixing of the rolling bearing 11 by the fixed plate 230 can be stabilized.

  The compression portion 238 that compresses the elastic body 250 is disposed between the screw hole 240 and the center 232 </ b> C of the through hole 232. That is, the rotation shaft 6 can be stably supported by disposing the compression portion 238 between the rotation shaft 6 supported by the rolling bearing 11 and the screw hole 240. In addition, the vibration of the rotating shaft 6 can be further suppressed. In addition, the elastic body 250 is disposed at three locations in the circumferential direction on the inner peripheral surface 234 of the through hole 232. Therefore, the consumption of the elastic body can be suppressed as compared with the aspect in which the elastic body is disposed on the entire circumference of the inner peripheral surface 234 of the through hole 232.

  Next, Embodiment 3 will be described with reference to FIGS. The rolling bearing unit (rolling bearing device) 310 according to the third embodiment is configured such that the elastic body 350 is disposed between the inner peripheral surface 334 of the through hole 332 and the second outer peripheral surface 316, and the outer ring 314 of the rolling bearing 311. It is constructed integrally on the side. The second outer peripheral surface 316 of the outer ring 314 has an annular groove 319 in which a concave groove is notched on the second outer peripheral surface 316. The elastic body 350 is configured as an annular O-ring. The elastic body 350 is fitted in the annular groove 319. Thereby, the elastic body 350 is configured such that movement in the axial direction is restricted on the second outer peripheral surface 316 and does not come out. An inner peripheral surface 334 of the through hole 332 in the fixed plate 330 is a compression portion 338 in which the central portion in the axial direction compresses the elastic body 350. In addition, the surfaces on both sides in the axial direction of the compression portion 338 are opposing portions 336 that face the second outer peripheral surface 316 and face each other. That is, on the inner peripheral surface 334 of the through hole 332, the facing portion 336 and the compression portion 338 are disposed adjacent to each other in the axial direction. The inner peripheral surface 334 of the through hole 332 is preferably substantially the same diameter as the outer diameter 16D of the second outer peripheral surface 16. This is because the inner peripheral surface 334 of the through hole 332 fulfills the functions of the facing portion 336 and the compression portion 338, so that the function is more efficiently applied. Here, the elastic body 350 in the third embodiment has an interference 352 with respect to the inner diameter 338D of the compression portion 338. In other words, the rolling bearing unit 310 has the interference 352 between the compression portion 338 that compresses the elastic body 350 and the second outer peripheral surface 16. The interference 352 indicates a portion where the outer diameter 350D of the elastic body 350 in the free state and the inner diameter 338D of the compression portion 338 overlap each other. Thus, according to the rolling bearing unit (rolling bearing device) 310 of the third embodiment, the same effects as those of the first and second embodiments described above are obtained.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment, It can implement in other various embodiment. For example, the aspect arrange | positioned adjacent to the opposing site | part and compression site | part in the internal peripheral surface of a through-hole may be either an axial direction or the circumferential direction, and is adjacent to both the axial direction and the circumferential direction. Embodiments can also be included. Further, the elastic body may be at least partly in the circumferential direction between the inner peripheral surface of the through hole and the second outer peripheral surface. In addition, the elastic body is not limited to adhesion when integrally formed on the inner peripheral surface side or the second outer peripheral surface side of the through hole. Further, the fixing plate is not limited to a triangular shape, and various shapes can be applied.

2 Housing 3 Mounting hole 4 Retention recess (inner side of housing)
5 Edge 6 Rotating shaft 7 Fixed part 10 Rolling bearing unit (rolling bearing device)
DESCRIPTION OF SYMBOLS 11 Rolling bearing 12 Inner ring 12a Inner ring raceway surface 14 Outer ring 14a Outer ring raceway surface 15 1st outer peripheral surface 16 2nd outer peripheral surface 16D Outer diameter 17 of 2nd outer peripheral surface Step surface 18 Rolling body 20 Cage 21 Main part 24 Column 30 Fixing Plate 32 Through-hole 32D Through-hole inner diameter 34 Through-hole inner peripheral surface 40 Screw hole 42 Contact surface 50 Elastic body 50D Elastic body free-state inner diameter 52 Tightening allowance 210 Rolling bearing unit (rolling bearing device)
230 Fixing plate 232 Through-hole 232C Through-hole center 234 Through-hole inner peripheral surface 236 Opposed portion 238 Compression portion 240 Screw hole 242 Abutment surface 250 Elastic body 252 Tightening allowance 310 Rolling bearing unit (rolling bearing device)
311 Rolling bearing 314 Outer ring 316 Second outer peripheral surface 319 Annular groove 332 Through hole 334 Through hole inner peripheral surface 330 Fixed plate 336 Opposed part 338 Compression part 350 Elastic body 352 Tightening allowance

Claims (5)

A rolling bearing that rotatably supports a rotating shaft in the housing;
A fixing plate that sandwiches and fixes an outer ring configured in the rolling bearing with the inner surface of the housing,
The outer peripheral surface of the outer ring has a first outer peripheral surface that fits into the housing, and a second outer peripheral surface that has a smaller diameter than the first outer peripheral surface and protrudes in the same direction from a side surface on one axial side of the first outer peripheral surface. And a step surface formed by the first outer peripheral surface and the second outer peripheral surface,
The fixing plate has a through hole that is inserted through the second outer peripheral surface, and a contact surface that contacts the step surface,
Between the inner peripheral surface of the through hole and the second outer peripheral surface, an elastic body that is compressed in the radial direction between the inner peripheral surface and the second outer peripheral surface is disposed at least partially in the circumferential direction. Rolling bearing device. The rolling bearing device according to claim 1,
A rolling bearing device in which an inner peripheral surface of the through hole is disposed adjacent to an opposing portion that is close to and opposed to the second outer peripheral surface and a compression portion that compresses the elastic body. The rolling bearing device according to claim 1 or 2,
The said elastic body is a rolling bearing apparatus arrange | positioned in the perimeter between the internal peripheral surface of the said through-hole, and the said 2nd outer peripheral surface. A rolling bearing device according to any one of claims 1 to 3,
The said elastic body is a rolling bearing apparatus comprised integrally in the inner peripheral surface side or the said 2nd outer peripheral surface side of the said through-hole. The rolling bearing device according to claim 2,
The fixing plate is formed by penetrating the through hole in a triangular flat plate, and screw holes for fastening and fixing to the housing at three locations radially outward of the through hole are formed,
The inner peripheral surface of the through hole is configured as an elastic part by integrally forming an elastic body between the screw hole and the center of the through hole, and the opposing part is provided between the compression parts. Rolling bearing device composed.

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