JP2017009083A - Rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit circumferential misalignment (creep) of a rolling bearing relative to a housing inner peripheral surface and make vibrations caused by bearing rotation less likely to be transmitted to the housing in the rolling bearing.SOLUTION: A rolling bearing 7 includes: an inner ring 11 fitted onto a rotary shaft 4 and attached thereto; an outer ring 12 attached to a housing inner peripheral surface 3; a plurality of balls 13 disposed between the inner ring 11 and the outer ring 12; and a cylindrical elastic member 20 which is provided along a circumferential direction at one portion of an outer peripheral surface 30 of the outer ring 12 and has an axial dimension larger than a radial thickness dimension. A bearing outer peripheral surface 40 fitted in the housing inner peripheral surface 3 comprises the elastic member 20 and the other portion of the outer peripheral surface of the outer ring 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rolling bearing.

  Many rolling bearings are used in various industrial equipment. The rolling bearing includes an inner ring, an outer ring, and a plurality of rolling elements interposed between the inner ring and the outer ring. As shown in FIG. 5, in the rolling bearing 90 that supports the rotating shaft 95 in the housing 97, an inner ring 91 is fitted on the rotating shaft 95 and attached, and an outer ring 92 is attached to the housing inner peripheral surface 98. Yes. In a preload imparting type rolling bearing for a motor or the like, there is a gap fit between the outer ring 92 and the housing inner peripheral surface 98.

  Therefore, in order to prevent circumferential displacement (hereinafter also referred to as creep) of the rolling bearing 90 (outer ring 92) with respect to the housing inner peripheral surface 98, there is a technique for fixing the outer ring 92 to the housing inner peripheral surface 98 with an adhesive. It is known (see, for example, Patent Document 1).

  In the case of the prior art shown in FIG. 5, the adhesive is fitted between the outer ring 92 and the housing inner peripheral surface 98 through the hole 96 provided in the housing 97 with the rolling bearing 90 attached to the housing inner peripheral surface 98. The outer ring 92 is fixed to the housing 97 with this adhesive.

JP 2010-216580 A

  However, when the outer ring 92 is fixed to the housing 97 with an adhesive, creep is prevented, but the rotational vibration of the shaft / bearing system is easily transmitted to the housing 97, and the housing 97 vibrates and generates noise. There is. In other words, vibration (noise) of the housing 97 becomes a problem when trying to prevent creep.

  Accordingly, an object of the present invention is to suppress a shift (creep) in the circumferential direction of the rolling bearing with respect to the inner peripheral surface of the housing and to make it difficult to transmit vibration due to bearing rotation to the housing.

  In order to achieve the above object, a rolling bearing according to the present invention includes an inner ring that is externally fitted to a shaft, an outer ring that is attached to an inner peripheral surface of a housing, and a plurality of rollers that are interposed between the inner ring and the outer ring. A rolling element, and a cylindrical elastic member that is provided along a circumferential direction in a part of the outer peripheral surface of the outer ring and has a larger axial dimension than a radial thickness dimension, and the elastic member and the outer ring A bearing outer peripheral surface that fits into the inner peripheral surface of the housing is constituted by the other part of the outer peripheral surface.

  According to the present invention, the frictional resistance of the elastic member can suppress the circumferential displacement (creep) of the rolling bearing (outer ring) relative to the inner peripheral surface of the housing, and the elastic member functions as a damper. Thus, it is possible to make it difficult for vibration due to bearing rotation to be transmitted to the housing. Further, when a load is applied to the rolling bearing, the load can be transmitted to the housing on the other part of the outer peripheral surface of the outer ring where no elastic member is provided, and the rigidity of the bearing is maintained.

Further, the outer peripheral surface of the outer ring is a first outer peripheral surface portion that is the part and provided with the elastic member, and a second outer peripheral surface portion that is the other portion and has a diameter larger than that of the first outer peripheral surface portion. It is preferable to have.
In this case, the outer peripheral surface of the outer ring has a stepped shape having a first outer peripheral surface portion with a small diameter and a second outer peripheral surface portion with a large diameter, an elastic member is provided on the first outer peripheral surface portion, and the second outer peripheral surface portion is in the housing. It becomes possible to contact the peripheral surface. Thereby, the elastic member has a thickness dimension, and it becomes easy to secure a predetermined crushing allowance in the radial direction, and the function of suppressing the creep can be enhanced. Furthermore, the outer ring can be fitted to the inner peripheral surface of the housing at the second outer peripheral surface portion, which is the other portion of the outer peripheral surface, thereby obtaining a configuration that maintains the rigidity of the bearing.

Moreover, it is preferable that a diameter-reduced surface having a diameter that decreases toward the end in the axial direction is provided on the outer peripheral side of at least one of both axial ends of the elastic member.
When the outer ring is moved in the axial direction and attached to the inner peripheral surface of the housing, the reduced diameter surface is provided when the reduced diameter surface is provided on the outer peripheral side of the edge of the elastic member which is the front side in the moving direction. Since it functions as a guide surface, the outer ring can be easily attached. Further, the space on the radially outer side of the reduced diameter surface can function as a space for releasing a part of the elastic member that is pushed by the inner peripheral surface of the housing and elastically deforms.

  The rolling element is a ball, and the elastic member is on a virtual extension line passing through a contact point between the raceway surface of the inner ring and the ball and a contact point between the ball and the raceway surface of the outer ring. It can be set as the structure provided. In this case, it is possible to enhance the function of making it difficult for vibration due to bearing rotation to be transmitted to the housing.

  Alternatively, the rolling element is a ball, exposed on a virtual extension line that passes through a contact point between the raceway surface of the inner ring and the ball and a contact point between the ball and the raceway surface of the outer ring. It can be set as the structure by which the said other part of the said outer peripheral surface is provided. In this case, when a load is applied to the rolling bearing, the load can be transmitted to the housing on the other outer peripheral surface of the exposed outer ring, and the rigidity of the bearing can be further increased.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to suppress the shift | offset | difference (creep) of the rolling bearing with respect to the housing internal peripheral surface to the circumferential direction, it can make it difficult to transmit the vibration by bearing rotation to a housing.

It is a longitudinal cross-sectional view which shows one Embodiment of the rotating apparatus containing the rolling bearing of this invention. It is sectional drawing of the rolling bearing shown on the right side of FIG. It is sectional drawing of the elastic member currently fixed to a part of outer ring and an outer ring. It is sectional drawing which shows the modification of the rolling bearing shown in FIG. It is a longitudinal cross-sectional view which shows the conventional rotating apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a rotating device 1 including a rolling bearing 7 of the present invention. The rotating device 1 includes a housing 2 and a rotating shaft 4, and the rotating shaft 4 is rotatably supported by the housing 2 by a pair of rolling bearings 7 and 7. The housing 2 and the rotating shaft 4 are both made of steel, and can be made of, for example, ordinary steel or carbon steel. The rotating shaft 4 is interposed between the small-diameter shaft portions 4a and 4a to which the rolling bearings 7 and 7 are attached and the rolling bearings 7 and 7 (inner rings 11 and 11), and has a larger outer diameter than the small-diameter shaft portion 4a. And a radial shaft portion 4b.

  Annular portions 5a and 5b are provided on both axial sides of the inner peripheral surface 3 of the housing 2 (hereinafter also referred to as the housing inner peripheral surface 3). A rolling bearing 7 shown in FIG. 1 is a preload imparting bearing for a motor, and a preload spring 6 is provided between the annular portion 5b and the outer ring 12 of the rolling bearing 7 on one axial side (right side in FIG. 1). Is provided. By this preload spring 6, the rolling bearings 7, 7 are in a state where an axial preload is applied.

  The rolling bearing 7 on one side in the axial direction (right side in FIG. 1) and the rolling bearing 7 on the other side in the axial direction (left side in FIG. 1) have the same configuration, but the mounting directions are opposite. In the following, a detailed configuration will be described with the rolling bearing 7 on one axial side (right side in FIG. 1) as a representative.

  FIG. 2 is a cross-sectional view of the rolling bearing 7. The rolling bearing 7 is interposed between an inner ring 11 fitted and attached to the rotary shaft 4, an outer ring 12 fitted and attached to the inner peripheral surface 3 of the housing, and the inner ring 11 and the outer ring 12. And a plurality of rolling elements. The rolling element of this embodiment is a ball 13, and the rolling bearing 7 shown in FIG. 2 is a deep groove ball bearing. The rolling bearing 7 includes an annular cage 14 that holds a plurality of balls 13, and sealing members 16 that are provided on both axial sides of an annular space 15 formed between the inner ring 11 and the outer ring 12. 17.

  The inner ring 11 is fitted in close contact with the rotary shaft 4 and can rotate integrally with the rotary shaft 4. The outer ring 12 is attached to the housing 2 in a fixed state, and the outer ring 12 is attached to the inner peripheral surface 3 of the housing with a clearance fit. An inner ring raceway groove (track surface) 11 a on which the balls 13 roll is provided on the outer peripheral surface of the inner ring 11, and an outer ring raceway groove (track) on which the balls 13 roll on the inner peripheral surface of the outer ring 12. Surface) 12a is provided.

The plurality of balls 13 are provided in the annular space 15 between the inner ring 11 and the outer ring 12, and when the rolling bearing 7 rotates (when the inner ring 11 rotates), these balls 13 are held by the cage 14. In this state, the inner ring raceway groove 11a and the outer ring raceway groove 12a roll.
The inner ring 11, outer ring 12, and ball 13 of the present embodiment are made of steel such as bearing steel.

  The cage 14 can hold a plurality of balls 13 at predetermined intervals (equal intervals) along the circumferential direction. For this purpose, the cage 14 has pockets 18 for accommodating the balls 13. A plurality are formed along the circumferential direction. The cage 14 of the present embodiment includes an annular portion 14a provided on one axial side of the ball 13 and a plurality of column portions 14b extending from the annular portion 14a to the other axial side. Have. A pocket 18 is formed between the pair of column portions 14b, 14b adjacent to each other in the circumferential direction on the other axial side of the annular portion 14a (left side in FIG. 2). The cage 14 of the present embodiment is made of resin, but may be made of metal. In addition, the cage 14 may be in other forms, for example, can be configured to have an annular portion on the other side in the axial direction.

  The sealing members 16 and 17 are made of shield plates that are not in contact with the inner ring 11. The radially outer portions 16a and 17a of the sealing members 16 and 17 are attached to the outer ring 12, and the radially inner portions 16b and 17b are opposed to the inner ring 11 with a gap. The sealing members 16 and 17 may be seals having rubber lips.

  The rolling bearing 7 of the present embodiment further includes an elastic member 20 attached to the outer ring 12. The elastic member 20 has a cylindrical shape, and is provided along the circumferential direction in the first outer peripheral surface portion 31 that is a part of the outer peripheral surface 30 of the outer ring 12. That is, the cylindrical elastic member 20 is provided so as to cover the first outer peripheral surface portion 31 along the circumferential direction. The elastic member 20 is made of rubber (for example, nitrile rubber), is vulcanized and bonded to the first outer peripheral surface portion 31, and is integrated with the outer ring 12.

  FIG. 3 is a sectional view of a part of the outer ring 12 and the elastic member 20 fixed to the outer ring 12. 3 (and FIG. 2) shows the elastic member 20 in a natural state before elastic deformation, and the housing inner peripheral surface 3 is indicated by an imaginary line (two-dot chain line). As shown in FIG. 3, the elastic member 20 is a cylindrical rubber member having an axial dimension Y larger (t <Y) than a radial thickness dimension t.

  The elastic member 20 of the present embodiment extends inward in the radial direction from the axial end of the elastic main body 29 in addition to the cylindrical elastic main body 29 covering the first outer peripheral surface 31. An annular elastic portion 28 is provided. The annular elastic portion 28 covers a part of the side surface 12 b of the outer ring 12. The thickness dimension t in the radial direction of the elastic member 20 is the thickness dimension in the elastic main body 29. Further, the thickness dimension t of the elastic member 20 is constant in the axial direction, and is also constant in the circumferential direction. The axial dimension Y of the elastic member 20 is a constant value in the circumferential direction.

  The shape of the outer peripheral surface 30 of the outer ring 12 will be described. The outer peripheral surface 30 includes a first outer peripheral surface portion 31 in which the elastic member 20 is provided, and a second outer peripheral surface portion 32 that is not provided with the elastic member 20 and is exposed radially outward. That is, the elastic member 20 is provided only on a part of the outer peripheral surface 30 (first outer peripheral surface portion 31), and the other portion (second outer peripheral surface portion 32) of the outer peripheral surface 30 is the outer peripheral surface of the material of the outer ring 12, that is, It is a metal surface. In the form shown in FIG. 2, the first outer peripheral surface portion 31 is wider than the second outer peripheral surface portion 32.

The outer peripheral surface 30 of the outer ring 12 is a stepped surface, and the second outer peripheral surface portion 32 is larger in diameter than the first outer peripheral surface portion 31. An inclined surface 33 is interposed between the first outer peripheral surface portion 31 and the second outer peripheral surface portion 32. The elastic member 20 is provided over the entire range from the intermediate portion 33 a in the axial direction of the inclined surface 33 to the first outer peripheral surface portion 31.
Thus, the outer peripheral surface 30 of the outer ring 12 is a part of the outer peripheral surface 30 and the first outer peripheral surface portion 31 provided with the elastic member 20, and the other outer peripheral surface 30 and the first outer peripheral surface portion. The second outer peripheral surface portion 32 is larger in diameter than 31.

  As shown in FIG. 2, the second outer peripheral surface portion 32 occupies substantially half of the outer peripheral surface 30 and is continuous with the side surface 12 c on one axial side. The first outer peripheral surface portion 31 occupies the remaining portion of the outer peripheral surface 30 and is continuous with the side surface 12b on the other side in the axial direction. As a result, the elastic member 20 is configured to cover the remaining range (first outer peripheral surface portion 31) except for one axial side (second outer peripheral surface portion 32) of the outer peripheral surface 30, and as shown in FIG. The outer ring 12 has a left-right asymmetric configuration.

  In a state where the rolling bearing 7 is attached to the housing 2, the elastic member 20 fixed to the first outer peripheral surface portion 31 contacts the housing inner peripheral surface 3, and the elastic member 20 is elastically compressed and deformed in the radial direction. It is in. That is, as shown in FIG. 3, the elastic member 20 has a crushing margin (tightening margin) G. The crushing allowance G can be set in the range of 0.05 to 0.1 mm, for example.

On the other hand, the second outer peripheral surface portion 32 is fitted to the housing inner peripheral surface 3 with a gap K. The gap K is set in a range of zero to several tens of μm, and the second outer peripheral surface portion 32 is in a state of being fitted to the housing inner peripheral surface 3.
As described above, in the rolling bearing 7 of the present embodiment, the elastic member 20 provided on a part of the outer peripheral surface 30 (first outer peripheral surface portion 31) of the outer ring 12 and the other portion (second outer peripheral surface portion) of the outer peripheral surface 30. 32) constitutes a bearing outer peripheral surface 40 that fits into the inner peripheral surface 3 of the housing.

According to this rolling bearing 7, the frictional resistance of the elastic member 20 can suppress the circumferential displacement (hereinafter also referred to as creep) of the rolling bearing 7 (outer ring 12) with respect to the inner peripheral surface 3 of the housing. Since the elastic member 20 functions as a damper, it is possible to make it difficult for vibration due to bearing rotation to be transmitted to the housing 2 (that is, vibration can be attenuated). By making it difficult for vibration to be transmitted to the housing 2, it is possible to suppress noise generated from the housing 2. In particular, since the elastic member 20 has a cylindrical shape having an axial dimension Y larger than the radial thickness dimension t (t <Y), the elastic member 20 has a wide range of friction against the inner peripheral surface 3 of the housing. Resistance can be given, creep can be effectively suppressed, and a configuration in which vibration is hardly transmitted to the housing 2 can be obtained.
Further, when a load (particularly having a radial component) is applied to the rolling bearing 7, the load can be transmitted to the housing 2 at the second outer peripheral surface portion 32 where the elastic member 20 is not provided. The rigidity of is maintained.

  As described above, the outer peripheral surface 30 of the outer ring 12 has a stepped shape having the first outer peripheral surface portion 31 having a small diameter and the second outer peripheral surface portion 32 having a large diameter. Then, the elastic member 20 is provided on the first outer peripheral surface portion 31 having a small diameter, and the second outer peripheral surface portion 32 having a large diameter can be brought into direct contact with the inner peripheral surface 3 of the housing (that is, the second outer peripheral surface portion 32 is made of metal. Surface contact).

According to this configuration, the elastic member 20 has the thickness dimension t, and it becomes easy to secure a predetermined crushing allowance G in the radial direction, and the function of suppressing creep can be enhanced.
If the outer diameters of the first outer peripheral surface portion 31 and the second outer peripheral surface portion 32 are equal, the thickness t of the elastic member 20 is determined by the value of the fastening margin G, the second outer peripheral surface portion 32, and the housing inner peripheral surface 3. Since these values are the sum of the values of the gap K and both of these values are small as described above, the thickness (t) of the elastic member 20 becomes very thin. However, as described above, by providing the elastic member 20 on the first outer peripheral surface portion 31 having a small diameter, the thickness dimension t of the elastic member 20 is made larger than the sum of the value of the fastening allowance G and the value of the gap K. be able to. As a result, the elastic member 20 can be easily vulcanized and bonded to the outer ring 12 and molded, and the elastic member 20 can have strength (particularly peeling strength), and the mounting operation of the rolling bearing 7 can be facilitated. .
The outer ring 12 of the present embodiment is fitted to the housing inner peripheral surface 3 with a gap fit in the second outer peripheral surface portion 32 having a large diameter. The second outer peripheral surface portion 32 is connected to the housing inner peripheral surface 3. Since direct contact is possible, a configuration that maintains the rigidity of the bearing can be obtained.

  In the case of the prior art shown in FIG. 5, it is necessary to form the hole 96 in the housing 97. However, according to the rolling bearing 7 of the present embodiment, such a hole need not be formed. Further, in the prior art, a process of pouring the adhesive through the hole 96 and drying it is necessary, but according to the rolling bearing 7 of the present embodiment, such a process is unnecessary.

  Further, in the rolling bearing 7 of the present embodiment, the diameter of the elastic member 20 on the outer peripheral side of the edge 21 on one axial side (the right side in FIG. 3) decreases toward the end 22 on the one axial side. A first reduced diameter surface (inclined surface) 23 is provided. Further, on the outer peripheral side of the edge 25 on the other axial side of the elastic member 20 (left side in FIG. 3), a second reduced-diameter surface whose diameter decreases toward the end 26 on the other axial side ( (Inclined surface) 24 is provided.

The axial one side (right side) of the rotating device 1 shown in FIG. 1 will be described. As described above, the annular portion 5b is provided on the inner peripheral surface 3 of the housing, and between the annular portion 5b and the outer ring 12 is provided. Includes a preload spring 6. The preload spring 6 needs to push the side surface 12c of the outer ring 12 in the axial direction. Therefore, in the present embodiment, the surface with which the preload spring 6 is brought into contact is the side surface 12 c that is continuous with the second outer peripheral surface portion 32.
This is because the elastic member 20 has an annular elastic portion 28 that covers a part of the side surface 12 b continuous with the first outer peripheral surface portion 31. That is, if the preload spring 6 presses the side surface 12b of the outer ring 12 covered by the annular elastic portion 28, it becomes difficult to set a predetermined preload due to the presence of the annular elastic portion 28. is there.

Further, the other side in the axial direction (left side in FIG. 1) will be described. By the action of the preload spring 6, the side surface 12c continuous with the second outer peripheral surface portion 32 contacts the annular portion 5a. If the annular elastic portion 28 of the elastic member 20 is interposed between the annular portion 5a and the outer ring 12, it is difficult to set the preload. Therefore, the side surface 12c continuous with the second outer peripheral surface portion 32 is not the side surface 12b continuous with the first outer peripheral surface portion 31 to which the elastic member 20 is fixed, but is a surface that contacts the annular portion 5a.
Thus, the surface which makes the outer ring 12 contact from the axial direction with respect to the members used for applying the axial preload such as the preload spring 6 and the annular portion 5a is continuous with the second outer peripheral surface portion 32 and the metal surface. This is the side surface 12c. Thereby, the setting of the axial preload with respect to the rolling bearing 7 becomes easy.

Further, in FIG. 1, for example, when the rolling bearing 7 on one side (right side) in the axial direction is attached to the inner peripheral surface 3 of the housing by moving in the axial direction along the inner peripheral surface 3 of the housing, it is indicated by an arrow G <b> 1. The direction becomes the moving direction. In this case, since the first reduced diameter surface 23 is provided on the front side in the moving direction indicated by the arrow G1 among the elastic members 20 in the rolling bearing 7, the outer ring to which the elastic members 20 are fixed. When the shaft 12 is moved in the axial direction with respect to the housing inner peripheral surface 3, the first reduced diameter surface 23 functions as a guide surface, so that the outer ring 12 can be easily attached.
Furthermore, when the attachment is completed, the space radially outside the first diameter-reduced surface 23 functions as a space for releasing a part of the elastic member 20 that is pushed by the housing inner peripheral surface 3 and elastically deforms. The elastic member 20 can be deformed without difficulty.

  In the form shown in FIG. 1, the direction in which the rolling bearing 7 is moved in the axial direction for assembly is the direction indicated by the arrow G <b> 1, but it may be the opposite direction, and in this case, the elastic member 20 is provided. The second reduced diameter surface 24 is the front side in the movement direction. Also in this case, the second reduced diameter surface 24 can function as a guide surface, and the outer ring 12 can be easily attached. The second reduced diameter surface 24 can function as a space for releasing a part of the elastic member 20 that is elastically deformed.

  In addition, as described above (see FIG. 3), the inclined surface 33 is interposed between the first outer peripheral surface portion 31 and the second outer peripheral surface portion 32. Therefore, the space on the radially outer side of the inclined surface 33 can function as a space for releasing a part of the elastic member 20 that is pushed and elastically deformed by the inner peripheral surface 3 of the housing. Can be deformed.

  In the form shown in FIG. 2, the elastic member 20 is provided on the virtual extension line L1 passing through the contact point P1 between the inner ring raceway groove 11a and the ball 13 and the contact point Q1 between the ball 13 and the outer ring raceway groove 12a. It has been. That is, the axial dimension Y of the elastic member 20 is set so that the virtual extension line L1 passes through the elastic member 20. Since the rolling bearing 7 is attached between the housing 2 and the rotating shaft 4, an axial preload is set. Therefore, the virtual extension line L <b> 1 is the center line of the rolling bearing 7. Although inclined with respect to the orthogonal line, the inclined virtual extension line L <b> 1 passes through the elastic member 20. With this configuration, it is possible to enhance the function of making it difficult to transmit vibration due to bearing rotation, that is, rotational vibration of the shaft / bearing system to the housing 2.

FIG. 4 is a sectional view showing a modification of the rolling bearing 7 shown in FIG. In the rolling bearing 7 shown in FIG. 4, the first outer peripheral surface portion 31 is narrower than the second outer peripheral surface portion 32, and the axial dimension Y of the elastic member 20 is shorter than the form shown in FIG. 2. Yes. The other is the same.
Then, as shown in FIG. 4, on the virtual extension line L2 passing through the contact point P2 between the inner ring raceway groove 11a and the ball 13 and the contact point Q2 between the ball 13 and the outer ring raceway groove 12a, the elastic member 20 The 2nd outer peripheral surface part 32 which does not exist but is exposed is provided. In the case of this configuration, when a load (particularly including a radial component) is applied to the rolling bearing 7, the load can be transmitted to the housing 2 on the exposed second outer peripheral surface portion 32. The rigidity can be further increased.

The embodiments disclosed above are illustrative in all respects and not restrictive. That is, the rolling bearing of the present invention is not limited to the illustrated form, but may be of another form within the scope of the present invention. For example, the rolling bearing may be an angular ball bearing, and the rolling element may be other than a ball, and may be a cylindrical roller or a tapered roller.
In FIG. 1, the rolling bearing 7 has been described as a preload imparting type bearing for a motor. However, the rolling bearing 7 may be other than for a motor, and the rolling bearing of the present invention has both problems of creep and vibration (noise). It can be applied to a rotating device.

  Furthermore, although the said embodiment (refer FIG. 3) demonstrated the case where the diameter-reduced surface (in this embodiment inclined surface) 23 and 24 was provided in the outer peripheral side of each axial direction both edges of the elastic member 20, respectively. In addition, a diameter-reduced surface may be provided on only one of both axial edges of the elastic member 20. That is, it is only necessary to provide a reduced diameter surface (inclined surface) whose diameter decreases toward the end surface in the axial direction on at least one of the peripheral edges of the elastic member 20 in the axial direction.

1: Rotating device 2: Housing 3: Housing inner peripheral surface (inner peripheral surface)
4: Rotating shaft (shaft) 11: Inner ring 12: Outer ring 13: Ball (rolling element) 20: Elastic member 21 Edge on one side in axial direction 22: End on one side in axial direction 23, 24: Reduced diameter surface 25: Edge 26 on the other side in the axial direction 26: End on the other side in the axial direction 30: Outer peripheral surface 31: First outer peripheral surface 32: Second outer peripheral surface 40: Bearing outer peripheral surface t: Thickness dimension Y: Axial dimension P1, P2 : Contact point Q1, Q2: Contact point L1, L2: Virtual extension line

Claims (5)

An inner ring that is externally fitted to the shaft, an outer ring that is attached to the inner peripheral surface of the housing, a plurality of rolling elements interposed between the inner ring and the outer ring, and a part of the outer peripheral surface of the outer ring. A cylindrical elastic member provided along the direction and having a larger axial dimension than a radial thickness dimension,
A rolling bearing in which a bearing outer peripheral surface that fits into the inner peripheral surface of the housing is constituted by the elastic member and the other part of the outer peripheral surface of the outer ring.   The outer peripheral surface of the outer ring includes the first outer peripheral surface portion that is the part and provided with the elastic member, and the second outer peripheral surface portion that is the other portion and has a diameter larger than that of the first outer peripheral surface portion. The rolling bearing according to claim 1.   3. The rolling bearing according to claim 1, wherein a diameter-reduced surface having a diameter that decreases toward an axial end is provided on an outer peripheral side of at least one of both axial edges of the elastic member. The rolling element is a ball,
The elastic member is provided on a virtual extension line that passes through a contact point between the raceway surface of the inner ring and the ball and a contact point between the ball and the raceway surface of the outer ring. A rolling bearing according to any one of the above. The rolling element is a ball,
The other part of the exposed outer peripheral surface is provided on a virtual extension line passing through a contact point between the raceway surface of the inner ring and the ball and a contact point between the ball and the raceway surface of the outer ring. The rolling bearing according to any one of claims 1 to 3.

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