JP2014015960A - Pulley device - Google Patents

Abstract

Provided is a pulley device capable of suppressing rotation of an inner ring when attached to a member to be attached.
An inner ring (12) includes a clamping surface (121) made of a material harder than an abutting surface (411) of a bracket (40) with which an axial end surface abuts, and a first inclined surface (123) and the second inclined surface (413) are inclined. The inclination angle at which the first inclined surface 123 is inclined with respect to the first flat surface 122 is the first inclination angle, and the inclination angle at which the second inclined surface 413 is inclined with respect to the second flat surface 412 is the first inclination angle. The inclination angle is set to 2 and the relationship of “first inclination angle <second inclination angle” is established. The contact surface 411 includes a corner portion 414 formed by the inner peripheral edge of the second inclination surface 413, and The corner portion 414 is disposed at a position closer to the inner diameter side than the outer diameter side in the radial direction, and when the pulley device 1 is attached to the bracket 40, the corner portion 414 comes into contact with the first inclined surface 123 in advance.
[Selection] Figure 2

Description

  The present invention relates to a pulley apparatus.

  A pulley device used as an idler pulley that accurately guides a belt that transmits the rotation of an automobile engine to an engine accessory such as an alternator is a bearing comprising an inner ring and an outer ring, and an outer ring fitted to the outer ring so that the belt transfer section And a pulley body formed on the surface. Since this pulley device is provided on a bracket in an automobile engine room with a fastening member (bolt) inserted through the inner ring, the pulley device is attached to the bracket while sandwiching the inner ring by being screwed into a threaded portion. In order to prevent water and the like from entering the inside of the bearing, the pulley device is fitted with a sealing device at both ends of the bearing to seal between the outside and the inside of the bearing. Since this sealing device is press-fitted with the end face of the inner ring as a reference, the end face of the inner ring is polished and finished to a predetermined surface roughness. (Patent Document 1)

JP 2000-74189 A

  The pulley apparatus is quickly attached to a bracket of an automobile by giving a hammering (impact) in a rotating direction to a bolt by rotation of a motor called an impact wrench. And in the pulley device, when the end face of the inner ring that is a contact surface with the bracket is polished, and when a lot of rust preventive oil or the like adheres, the frictional resistance becomes small, and when attaching to the bracket, In some cases, the inner ring cannot be attached to the bolt. In addition, rotation occurs, and if it is attached with a tightening torque more than necessary, the bolt or the female thread may be destroyed. Therefore, when the pulley device is attached to the attached member, it has been a problem to suppress the accompanying rotation of the inner ring.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a pulley device that can suppress the rotation of the inner ring when it is attached to a member to be attached.

  In order to solve the above-described problem, the structural feature of the pulley device according to claim 1 is provided with a rolling bearing having an inner ring and an outer ring, and a pulley body provided outside the outer ring, and is inserted through the inner ring. In the pulley device that clamps the inner ring to the attached member by fastening the inner ring to the attached member and attaches the inner ring to the attached member, the inner ring is at least one end face of both axial end faces, and the end face is It has a disc-shaped sandwiching surface made of a material harder than the abutting member, and the sandwiching surface is radially inward from the first flat surface perpendicular to the axis and the inner periphery of the first flat surface. A first inclined surface extending inward or outward in the axial direction, and the counterpart member includes a disk-shaped contact surface that contacts the clamping surface, and the contact surface is , Opposed to the first flat surface perpendicular to the axis of the bearing 2 flat surfaces and a second inclined surface extending radially inward from the inner peripheral edge of the second flat surface and inclined in the axial direction opposite to the first inclined surface, the first inclined surface The inclination angle at which the second inclined surface is inclined is defined as a first inclination angle at which the first inclined surface is inclined with respect to the first flat surface, and the second inclination with respect to the second flat surface. An inclination angle at which the surface is inclined is defined as a second inclination angle, and a relationship of “first inclination angle <second inclination angle” is set, and the contact surface is an inner peripheral edge or an outer peripheral edge of the second inclined surface. A corner portion formed by an edge on the innermost ring side in the axial direction, and the corner portion is disposed at a position closer to the inner diameter side than the outer diameter side in the radial direction, and the pulley device is attached to the attached member When attaching to, it is that the said corner | angular part contacts the said 1st inclined surface ahead.

  According to the pulley device of the first aspect, the corner portion formed on the contact surface of the mating member is disposed at a position close to the inner diameter side and contacts the first inclined surface in advance, so the peripheral speed at the contact position is small. . In addition, since the corner portion is formed of a softer material than the inner ring, it is elastically deformed when contacted, and the reaction force increases in this elastic region. In addition, when the sandwiching surface and the contact surface are in contact with each other, the inclined surface is in contact with the flat surface, so that the contact area is increased and the frictional force is increased. As a result, according to this pulley device, a resistance force that stops the rotation of the inner ring acts, and the rotation of the inner ring can be suppressed.

  In order to solve the above problem, a structural feature of the pulley device according to claim 2 is that the mating member is composed of the mounted member.

  According to the pulley device of the second aspect, the same effect as that of the first aspect can be obtained even when the mating member is a mounted member.

  In order to solve the above problem, a structural feature of the pulley device according to claim 3 is that the mating member is composed of the fastening member.

  According to the pulley device of the third aspect, even when the counterpart member is a fastening member, the same effect as that of the first aspect is obtained.

  In order to solve the above problem, a structural feature of the pulley device according to claim 4 is that the mating member is composed of the fastening member and the attached member.

  According to the pulley device of the fourth aspect, even when the mating member is the fastening member and the attached member, the same effect as that of the first aspect is obtained.

  In order to solve the above-mentioned problem, a structural feature of the pulley device according to claim 5 is that a slinger is provided that is sandwiched between the clamping surface, the fastening member, and the attached member, and covers an opening in the axial direction. The mating member is made of the slinger.

  According to the pulley device of the fifth aspect, even when the mating member is a slinger that is clamped between the clamping surface, the fastening member, and the attached member, the same effect as that of the first aspect is obtained.

  In order to solve the above-described problem, a structural feature of the pulley device according to claim 6 is that a slinger is provided between the clamping surface and the fastening member and covers an axial opening, and the mating member is provided. Is made of the above slinger.

  According to the pulley device of the sixth aspect, even when the counterpart member is a slinger clamped between the clamping surface and the fastening member, the same operational effects as in the first and second aspects are exhibited.

  In order to solve the above-described problem, a structural feature of the pulley device according to claim 7 is that a slinger is provided between the clamping surface and the attached member and covers an opening in the axial direction. The member is made of the slinger.

  According to the pulley device of the seventh aspect, even when the counterpart member is a slinger that is sandwiched between the clamping surface and the attached member, the same effects as those of the first and third aspects are exhibited.

  ADVANTAGE OF THE INVENTION According to this invention, when attaching to a to-be-attached member, the pulley apparatus which can suppress the accompanying rotation of an inner ring can be provided.

1st Embodiment: It is a fragmentary sectional view of the axial direction of a pulley apparatus. 1st Embodiment: It is the C section enlarged view of FIG. 2nd Embodiment: It is a fragmentary sectional view of the axial direction of a pulley apparatus. 2nd Embodiment: It is the D section enlarged view of FIG. 3rd Embodiment: It is principal part sectional drawing of the axial direction of a pulley apparatus. 4th Embodiment: It is principal part sectional drawing of the axial direction of a pulley apparatus. FIGS. 7 (a), 7 (b), and 7 (c) are diagrams for explaining modifications of FIG. 1, FIG. 3, FIG. 5, and FIG.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments of a pulley device according to the invention will be described below with reference to the drawings. In the following description, the attachment side indicates the right side in each drawing, and the anti-attachment side indicates the left side in each drawing.
<First Embodiment>
FIG. 1 is a partial cross-sectional view in the axial direction of a pulley apparatus 1 according to an embodiment of the present invention. FIG. 2 is an enlarged view of a portion C in FIG. This will be described with reference to FIGS.

  A pulley apparatus 1 used as an idler pulley that accurately guides a belt that transmits the rotation of an automobile engine to an engine auxiliary machine such as an alternator includes a rolling bearing 10 and a pulley body that is externally fitted to an outer ring 11 of the rolling bearing 10. 20

  The rolling bearing 10 includes a pair of outer rings 11 serving as rotating wheels, an inner ring 12 serving as a fixed ring, a single row of balls 13, a cage 14 that holds a plurality of balls 13, and both end surfaces between the inner and outer rings. And a slinger 16 (a mating member) that covers the seal 15 on the non-attachment side.

  The seal 15 includes a metal core 15a and an elastic member made of rubber or the like, and a seal member 15b that is integrally fixed to the core 15a. The seal 15 is configured such that the outer periphery of the seal member 15 b is fitted into the outer ring 11, extends radially inward from the seal member 15 b, forms a lip 15 c, and slides on the outer peripheral surface of the inner ring 12.

  The pulley body 20 includes an outer cylindrical portion 21 serving as a belt transfer portion, an inner cylindrical portion 23 that is externally fitted to the outer ring 11, and an annular disk portion that connects one end of the outer cylindrical portion 21 and one end of the inner cylindrical portion 23. 22 and a bent portion 24 that extends from the other end of the inner cylindrical portion 23, is bent in the axial direction, and abuts against the attachment-side end surface of the outer ring 11 with a pressing force.

  The pulley main body 20 is formed by pressing a single sheet (sheet metal) made of a steel plate having an outer cylindrical portion 21, an annular disc portion 22, an inner cylindrical portion 23, and a bent portion 24 having a certain thickness. It is formed by plastic working.

  The pulley device 1 inserts a bolt 30 (fastening member) into the inner ring 12 from the side opposite to the mounting side, and clamps the inner ring 12 by tightening from the direction of the arrow E to the bracket 40 (partner member, mounted member) of the automobile. It is attached. The slinger 16 is sandwiched between the bolt 30 and the inner ring 12.

  On the attachment side of the pulley device 1, the bent portion 24 of the pulley main body 20 covers the seal 15, and on the opposite side, a slinger 16 that covers the seal 15 is provided, thereby improving the sealing performance of the bearing.

  The inner ring 12 is attached to the bracket 40 by a clamping surface 121 that is an end surface on the attachment side abutting on a contact surface 411 that is an end surface of the bracket 40 and is tightened by a bolt 30. As shown in FIG. 2, the clamping surface 121 extends radially inward from the first flat surface 122 orthogonal to the axis F of the rolling bearing 10 and the inner peripheral edge of the first flat surface 122 and is axially opposite. A first inclined surface 123 that is inclined toward the mounting side. The first inclined surface 123 is inclined with respect to the first flat surface 122 at a first inclination angle A1.

  The inner ring 12 is made of, for example, a high carbon chrome bearing steel “SUJ2”, and is hardened and tempered to have a surface hardness of HRC 60 to 64, so that the inner ring 12 can withstand a large load as a race. have. Further, the sandwiching surface 121 of the inner ring 12 is polished to have a surface roughness Ra0.4, for example, because it is used as a reference for press-fitting the seal 15.

  The contact surface 411 is a second flat surface 412 that is orthogonal to the axis F and faces the first flat surface 122, extends radially inward from the inner periphery of the second flat surface 412, and the first inclined surface 123. 2nd inclined surface 413 which inclines to the non-attachment side of an axial direction, and the 4th flat surface 415 extended inward in the diameter direction from the inner periphery of the 2nd inclined surface 413. The second inclined surface 413 is inclined with respect to the second flat surface 412 at the second inclination angle B1. The first inclination angle A1 and the second inclination angle B1 are set to have a relationship of “first inclination angle A1 <second inclination angle B1”. The contact surface 411 has a corner portion 414 where the inner peripheral edge of the second inclined surface 413 is connected to the fourth flat surface 415. Thus, the corner portion 414 is closer to the inner diameter side than the outer diameter side in the radial direction, and is an edge arranged on the most anti-attachment side of both edges of the second inclined surface 413 in the axial direction. Formed. The bracket 40 is made of an aluminum alloy and is made of a softer material than the inner ring 12.

  In the pulley apparatus 1, when the inner ring 12 is attached to the bracket 40 with the bolt 30, the corner portion 414 formed on the contact surface 411 of the bracket 40 is disposed at a position close to the inner diameter side and precedes the first inclined surface 123. The peripheral speed at the contact position is small. Moreover, in the pulley apparatus 1, since the corner | angular part 414 is formed with a softer material than the inner ring | wheel 12, when it contacts, it will elastically deform and reaction force will increase in this elastic region. Moreover, in the pulley apparatus 1, when the clamping surface 121 and the contact surface 411 contact | abut, the 1st flat surface 122 and the 2nd flat surface 412 contact | abut, and in addition to this, the 1st inclined surface 123 and the 2nd inclined surface Since 413 contacts, the contact area increases and the frictional force increases. Accordingly, according to the pulley device 1, a resistance force that stops the accompanying rotation of the inner ring 12 acts, and the accompanying rotation of the inner ring 12 can be suppressed.

  As described above, according to the pulley device 1 according to the present embodiment, the accompanying rotation of the inner ring 12 can be suppressed when the pulley device 1 is attached to the bracket 40.

Second Embodiment
In the pulley device 1 according to the first embodiment, the second embodiment is an embodiment having a configuration in which the inclination directions of the inclined surfaces on the surface where the inner ring 12 and the bracket 40 abut are opposite to each other in the axial direction. In the second embodiment, the description of the same configuration as that of the first embodiment is omitted for the sake of brevity.

  FIG. 3 is a partial cross-sectional view of the pulley device 1a in the axial direction. FIG. 4 is an enlarged view of a portion D in FIG. This will be described with reference to FIGS.

  The inner ring 12a is attached to the bracket 40a by a clamping surface 12a1 which is an end surface on the attachment side abutting on an abutment surface 40a1 which is an end surface of the bracket 40a and is fastened by a bolt 30. As shown in FIG. 4, the clamping surface 12a1 extends from the inner periphery of the first flat surface 12a2 perpendicular to the axis F of the rolling bearing 10a and the first flat surface 12a2 in the radial direction and is attached in the axial direction. A first inclined surface 12a3 inclined to the side, and a third flat surface 12a4 extending radially inward from the inner peripheral edge of the first inclined surface 12a3. The first inclined surface 12a3 is inclined at the first inclination angle A2 with respect to the first flat surface 12a2.

  The contact surface 40a1 extends inward in the radial direction from the second flat surface 40a2 orthogonal to the axis F and opposed to the first flat surface 12a2, and the inner peripheral edge of the second flat surface 40a2, and the first inclined surface 12a3. And a second inclined surface 40a3 that is inclined toward the axial mounting side. The second inclined surface 40a3 is inclined at a second inclination angle B2 with respect to the second flat surface 40a2. The first inclination angle A2 and the second inclination angle B2 are set to have a relationship of “first inclination angle A2 <second inclination angle B2”. The contact surface 40a1 has a corner portion 40a4 where the outer peripheral edge of the second inclined surface 40a3 is connected to the second flat surface 40a2. As described above, the corner portion 40a4 is closer to the inner diameter side than the outer diameter side in the radial direction, and is an edge arranged on the most anti-attachment side of both edges of the second inclined surface 40a3 in the axial direction. Formed.

  In the pulley apparatus 1a, when the inner ring 12a is attached to the bracket 40a with the bolt 30, the corner portion 40a4 formed on the contact surface 40a1 of the bracket 40a is disposed at a position close to the inner diameter side and precedes the first inclined surface 12a3. The peripheral speed at the contact position is small. Moreover, in the pulley apparatus 1a, since the corner | angular part 40a4 is formed with a softer material than the inner ring | wheel 12a, when it contacts, it will elastically deform and reaction force will increase in this elastic region. Moreover, in the pulley apparatus 1a, when the clamping surface 12a1 and the contact surface 40a1 contact each other, the first flat surface 12a2 and the second flat surface 40a2 contact each other, and in addition to this, the first inclined surface 12a3 and the second inclined surface. Since 40a3 abuts, the contact area increases and the frictional force increases. Thus, according to the pulley device 1a, a resistance force that stops the accompanying rotation of the inner ring 12a acts, and the accompanying rotation of the inner ring 12a can be suppressed.

  As described above, according to the pulley device 1a according to the present embodiment, the rotation of the inner ring 12a can be suppressed when the pulley device 1a is attached to the bracket 40a as in the first embodiment.

<Third Embodiment>
The third embodiment is an embodiment in which the slinger 17 (a mating member) is provided on the attachment side in the pulley apparatus 1 in the first embodiment. In the third embodiment, the description of the same configuration as that of the first embodiment is omitted for the sake of brevity.

  FIG. 5 is a cross-sectional view of the main part in the axial direction of the pulley device 1b. This will be described with reference to FIG. The slinger 17 is sandwiched between the inner ring 12 and the bracket 40b to cover the seal 15. The slinger 17 is made of, for example, a cold-rolled steel plate “SPCC” and is made of a material softer than the inner ring 12.

  The inner ring 12 is attached to the bracket 40b by a clamping surface 121 that is an end surface on the attachment side abutting on a contact surface 171 that is an end surface of the slinger 17, and is tightened by a bolt 30.

  The contact surface 171 is a second flat surface 172 that is orthogonal to the axis F and faces the first flat surface 122, and extends radially inward from the inner peripheral edge of the second flat surface 172, and the first inclined surface 123. And a fourth inclined surface 175 extending inward in the radial direction from the inner peripheral edge of the second inclined surface 173. The contact surface 171 has a corner portion 174 where the inner peripheral edge of the second inclined surface 173 is connected to the fourth flat surface 175. Thus, the corner portion 174 is closer to the inner diameter side than the outer diameter side in the radial direction, and is an edge arranged on the most anti-attachment side of both edges of the second inclined surface 173 in the axial direction. Formed.

  In the pulley device 1b, when the inner ring 12 is attached to the bracket 40b with the bolt 30, the corner portion 174 formed on the contact surface 171 of the bracket 40b is disposed at a position close to the inner diameter side and precedes the first inclined surface 123. The peripheral speed at the contact position is small. Moreover, in the pulley apparatus 1b, since the corner | angular part 174 is formed with a softer material than the inner ring | wheel 12, when it contacts, it will elastically deform and reaction force will increase in this elastic region. Moreover, in the pulley apparatus 1b, when the clamping surface 121 and the contact surface 171 contact, the 1st flat surface 122 and the 2nd flat surface 172 contact | abut, and in addition to this, the 1st inclined surface 123 and the 2nd inclined surface 173 are contacted. , The contact area increases and the frictional force increases. Thus, according to the pulley device 1b, a resistance force that stops the accompanying rotation of the inner ring 12 acts, and the accompanying rotation of the inner ring 12 can be suppressed.

  As mentioned above, according to the pulley apparatus 1b which concerns on this Embodiment, when attaching to the bracket 40b similarly to 1st Embodiment, the accompanying rotation of the inner ring | wheel 12 can be suppressed.

  In the pulley device 1b of the present embodiment, the clamping surface 121 having the first inclined surface 123 and the contact surface 171 having the second inclined surface 173 are formed only on the attachment side end surface of the inner ring 12 and the end surface of the slinger 17. However, the present invention is not limited to this, and a configuration in which the inner ring 12 is also formed on the opposite end surface of the inner ring 12 and the end surface of the slinger 16 may be used.

<Fourth embodiment>
In the pulley device 1 according to the first embodiment, the fourth embodiment includes the inner ring 12 having a clamping surface on the non-attaching side end surface as well as the mounting side end surface, and the slinger that contacts the clamping surface has the contacting surface. It is an embodiment. In the fourth embodiment, the description of the same configuration as in the first embodiment is omitted for the sake of brevity.

  FIG. 6 is a cross-sectional view of the main part in the axial direction of the pulley device 1c. This will be described with reference to FIG. The inner ring 12b is attached to the bracket 40b by a clamping surface 12b1 which is an end surface on the side opposite to the attachment side abutting on a contact surface 16a1 which is an end surface of the slinger 16a, and which is tightened by a bolt 30. The clamping surface 12b1 includes a first flat surface 12b2 orthogonal to the axis F, and a first inclined surface 12b3 extending radially inward from the inner peripheral edge of the first flat surface 12b2 and inclined toward the axial mounting side. Have.

  The slinger 16a is sandwiched between the bolt 30 and the inner ring 12b and covers the seal 15. The slinger 16a is made of, for example, a cold-rolled steel plate “SPCC” and is made of a material softer than the inner ring 12b.

  The contact surface 16a1 extends inward in the radial direction from the second flat surface 16a2 orthogonal to the axis F and opposed to the first flat surface 12b2, and from the inner peripheral edge of the second flat surface 16a2, and the first inclined surface 12b3. And a second inclined surface 16a3 inclined to the axial mounting side, and a fourth flat surface 16a5 extending radially inward from the inner peripheral edge of the second inclined surface 16a3. The contact surface 16a1 has a corner portion 16a4 in which the inner peripheral edge of the second inclined surface 16a3 is connected to the fourth flat surface 16a5. As described above, the corner portion 16a4 is closer to the inner diameter side than the outer diameter side in the radial direction, and is the edge arranged closest to the mounting side among the two edges of the second inclined surface 16a3 in the axial direction. It is formed.

  In the pulley device 1c, when the inner ring 12b is attached to the bracket 40 with the bolt 30, the corner portion 16a4 formed on the contact surface 16a1 of the slinger 16a is disposed at a position close to the inner diameter side and precedes the first inclined surface 12b3. The peripheral speed at the contact position is small. Further, in the pulley device 1c, the corner portion 16a4 is formed of a softer material than the inner ring 12b, and therefore elastically deforms when contacted, and the reaction force increases in this elastic region. In the pulley device 1c, when the clamping surface 12b1 and the contact surface 16a1 are in contact, the first flat surface 12b2 and the second flat surface 16a2 are in contact, and in addition, the first inclined surface 12b3 and the second inclined surface 16a3. , The contact area increases and the frictional force increases. Thus, according to the pulley device 1c, a resistance force that stops the accompanying rotation of the inner ring 12b acts, and the accompanying rotation of the inner ring 12b can be suppressed.

  As described above, according to the pulley device 1c according to the present embodiment, the rotation of the inner ring 12b can be suppressed when the pulley device 1c is attached to the bracket 40, similarly to the first embodiment.

  In the pulley device 1c of the present embodiment, the first inclined surface 12b3 and the second inclined surface 16a3 are inclined toward the axial mounting side, but are not limited thereto, and are inclined toward the axially opposite mounting side. It may be configured.

  In the pulley device of the present invention, a configuration may be adopted in which a clamping surface having a first inclined surface is formed on the end surface on the opposite side of the inner ring 12 and a contact surface having a second inclined surface is formed on the bolt 30. .

  Further, in the pulley device of the present invention, a clamping surface having a first inclined surface is formed on the end surface on the opposite side of the inner ring 12 and the end surface on the mounting side, and a contact surface having a second inclined surface is formed on the bolt 30 and the bracket. The structure formed may be sufficient.

  In the pulley devices 1, 1a, 1b, and 1c of the above embodiment, the rolling bearing is a single-row ball bearing. However, the invention is not limited to this, and for example, a double-row ball bearing may be used.

In the pulley devices 1, 1a, 1b, and 1c of the above-described embodiment, the pulley main body 20 is plastically processed by pressing a single plate material or the like so that the axial sectional shape is substantially U-shaped. Instead, for example, the present invention may be applied to configurations of various shapes as shown in FIGS.
FIGS. 7 (a), 7 (b), and 7 (c) are diagrams for explaining modifications of FIG. 1, FIG. 3, FIG. 5, and FIG.
As shown in FIG. 7A, in the pulley apparatus 1d, the pulley main body 20a is fitted on the outer side of the outer ring 11a, the axial cross-sectional shape is substantially E-shaped, and a V-groove is formed on the outer periphery. .
Moreover, as shown in FIG.7 (b), as for the pulley apparatus 1e, the pulley main body 20b is fitted by the outer side of the outer ring | wheel 11a, and the axial cross-sectional shape is formed in the substantially letter E shape.
Moreover, as shown in FIG.7 (c), as for the pulley apparatus 1f, the pulley main body 20c is integrally formed in the outer side of the outer ring | wheel 11b.

1, 1a, 1b, 1c, 1d, 1e, 1f: Pulley device, 10, 10a: Rolling bearing, 11, 11a, 11b: Outer ring, 12, 12a, 12b: Inner ring, 12a1, 12b1, 121: Clamping surface, 12a2 , 12b2, 122: First flat surface, 12a3, 12b3, 123: First inclined surface, 12a4: Third flat surface, 13: Ball, 14: Cage, 15: Seal, 15a: Core metal, 15b: Seal member 15c: Lip, 16, 16a, 17: Slinger (mating member), 16a1, 40a1, 40c1, 171, 411: Contact surface, 16a2, 40a2, 172, 412: Second flat surface, 16a3, 40a3, 173 413: second inclined surface, 16a4, 40a4, 174, 414: corner portion, 16a5, 175, 415: fourth flat surface, 20, 20a, 0b, 20c: pulley main body, 21: outer cylindrical portion, 22: annular disk portion, 23: inner cylindrical portion, 24: bent portion, 30: bolt (fastening member, mating member), 40, 40a, 40b: bracket ( Mating member, attached member), A1, A2: first inclination angle, B1, B2: second inclination angle

Claims (7)

A rolling bearing having an inner ring and an outer ring, and a pulley body provided outside the outer ring, and the attached member to clamp the inner ring by fastening the inner ring to the attached member with a fastening member inserted through the inner ring. In the pulley device attached to
The inner ring is at least one end surface of both end surfaces in the axial direction, and includes a disc-shaped sandwiching surface formed of a material harder than a mating member with which the end surface abuts.
The sandwiching surface includes a first flat surface orthogonal to the axis and a first inclined surface extending radially inward from an inner peripheral edge of the first flat surface and inclined inward or outward in the axial direction. Have
The counterpart member includes a disk-shaped contact surface that contacts the clamping surface,
The contact surface includes a second flat surface that is orthogonal to the axis of the bearing and faces the first flat surface, and extends radially inward from an inner peripheral edge of the second flat surface and is formed on the first inclined surface. A second inclined surface that faces and is inclined in the axial direction,
An inclination angle at which the first inclined surface and the second inclined surface are inclined is defined as an inclination angle at which the first inclined surface is inclined with respect to the first flat surface, with respect to the second flat surface. The inclination angle at which the second inclined surface is inclined is the second inclination angle, and is set to have a relationship of “first inclination angle <second inclination angle”,
The contact surface has a corner formed by an innermost ring side edge in the axial direction of the inner peripheral edge or the outer peripheral edge of the second inclined surface,
The corner is disposed at a position closer to the inner diameter side than the outer diameter side in the radial direction,
When the pulley apparatus is attached to the member to be attached, the corner portion precedes and contacts the first inclined surface.   The pulley apparatus according to claim 1, wherein the mating member includes the attached member.   The pulley apparatus according to claim 1, wherein the mating member includes the fastening member.   The pulley apparatus according to claim 1, wherein the counterpart member includes the fastening member and the attached member. A slinger that is sandwiched between the clamping surface and the fastening member and the attached member and covers an opening in the axial direction is provided,
The pulley apparatus according to claim 1, wherein the mating member is made of the slinger. A slinger is provided between the clamping surface and the fastening member to cover the axial opening,
The pulley apparatus according to claim 1, wherein the mating member is made of the slinger. A slinger is provided between the clamping surface and the attached member and covers an axial opening,
The pulley apparatus according to claim 1, wherein the mating member is made of the slinger.

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