Friction disc and damping device

Abstract

The invention relates to a friction disc and a vibration damping device, and provides a friction disc capable of realizing low cost. The supporting plate is provided with a first clamping convex part, a through hole, a second clamping convex part and a concave part. The first engagement protrusion protrudes from the first side surface toward a first side in the axial direction. The through hole extends in the axial direction within the first engagement protrusion. The second engagement protrusion protrudes from the second side surface toward a second side in the axial direction. The recessed portion is disposed at a position overlapping the second engagement protruding portion when viewed from the axial direction. The recess is recessed from the first side surface to a second side in the axial direction. The first friction member has a first engagement recess that engages with the first engagement protrusion. The second friction member has a second engagement recess that engages with the second engagement protrusion.

Description

Technical Field

[0001] The present invention relates to a friction disk and a vibration damping device. Background Art

[0002] A vibration damping device or the like has a friction disk for frictional engagement. The friction disk has a support plate and a pair of friction members. The pair of friction members is fixed to the support plate by rivets so as to rotate integrally with the support plate.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2020-169683 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] Cost reduction of the friction disk is desired. Therefore, the technical problem of the present invention is to provide a friction member capable of achieving cost reduction.

[0008] Technical Solution for Solving the Problem

[0009] The friction disk according to the first aspect has a support plate, a first friction member, and a second friction member. The support plate has a first side surface and a second side surface. The first side surface faces the first side in the axial direction. The second side surface faces the second side in the axial direction. The first friction member is mounted on the first side surface of the support plate. The second friction member is mounted on the second side surface of the support plate. The support plate has a first engaging convex portion, a through hole, a second engaging convex portion, and a concave portion. The first engaging convex portion projects from the first side surface toward the first side in the axial direction. The through hole extends in the axial direction within the first engaging convex portion. The second engaging convex portion projects from the second side surface toward the second side in the axial direction. The concave portion is disposed at a position overlapping the second engaging convex portion when viewed from the axial direction. The concave portion is recessed from the first side surface toward the second side in the axial direction. The first friction member has a first engaging concave portion that engages with the first engaging convex portion. The second friction member has a second engaging concave portion that engages with the second engaging convex portion.

[0010] According to this configuration, since the first engaging convex portion engages with the first engaging concave portion, the first friction member can rotate integrally with the support plate. Similarly, since the second engaging convex portion engages with the second engaging concave portion, the second friction member can rotate integrally with the support plate. As a result, the rivets for rotating the first friction member and the second friction member integrally with the support plate can be omitted, thereby achieving cost reduction. In addition, since there is no need to form holes for riveting on the first friction member and the second friction member, the widths of the first friction member and the second friction member can be reduced, and cost reduction can also be achieved thereby.

[0011] The friction disk related to the second mode is configured as follows in the friction disk related to the first mode. The first engaging convex portion has a first main body portion and a first pressing portion. The first main body portion extends in the axial direction. The first pressing portion extends outward from the outer peripheral surface of the front end portion of the first main body portion and presses the first friction member.

[0012] The friction disk related to the third mode is configured as follows in the friction disk related to the first or second mode. At least one of the first engaging convex portion and the second engaging convex portion has an elliptical shape when viewed from the axial direction.

[0013] The friction disk related to the fourth mode is configured as follows in the friction disk related to any one of the first to third modes. The support plate has a slit and an anchoring portion. The slit extends from the outer peripheral surface radially inward. The anchoring portion projects from the edge portion of the slit toward the second side in the axial direction. The anchoring portion bites into the second friction member.

[0014] The friction disk related to the fifth mode is configured as follows in the friction disk related to any one of the first to fourth modes. The support plate has a plurality of first slits, a plurality of second slits, a plurality of first anchoring portions, and a plurality of second anchoring portions. Each first slit extends from the outer peripheral surface radially inward. Each first slit is arranged at intervals in the circumferential direction. Each second slit extends from the outer peripheral surface radially inward. Each second slit is arranged at intervals in the circumferential direction. Each first anchoring portion projects from the edge portion of each first slit toward the first side in the axial direction. Each first anchoring portion bites into the first friction member. Each second anchoring portion projects from the edge portion of each second slit toward the second side in the axial direction. Each second anchoring portion bites into the second friction member.

[0015] The friction disk related to the sixth mode is configured as follows in the friction disk related to the fifth mode. The first slits and the second slits are alternately arranged in the circumferential direction.

[0016] The friction disk related to the seventh mode is configured as follows in the friction disk related to the fifth or sixth mode. At least one of the first engaging convex portion and the second engaging convex portion is arranged between the first slit and the second slit in the circumferential direction.

[0017] The friction disk related to the eighth mode is configured as follows in the friction disk related to any one of the first to seventh modes. The first engaging concave portion has a small-diameter portion and a large-diameter portion. The small-diameter portion opens toward the support plate in the axial direction. The small-diameter portion houses the first engaging convex portion. The large-diameter portion communicates with the small-diameter portion in the axial direction. The large-diameter portion opens toward the opposite side of the support plate. The large-diameter portion is larger than the small-diameter portion when viewed from the axial direction.

[0018] The friction disk according to the ninth embodiment is configured as follows in any one of the friction disks according to the first to eighth embodiments. The second engaging recess has a large-diameter portion and a small-diameter portion. The large-diameter portion opens toward the support plate in the axial direction. The large-diameter portion houses the second engaging projection. The small-diameter portion communicates with the large-diameter portion in the axial direction. The small-diameter portion opens toward the side opposite to the support plate. The small-diameter portion is smaller than the large-diameter portion when viewed from the axial direction. The small-diameter portion is smaller than the second engaging projection when viewed from the axial direction.

[0019] The friction disk according to the tenth embodiment is configured as follows in any one of the friction disks according to the first to ninth embodiments. The support plate has a plurality of first engaging projections and a plurality of second engaging projections. The plurality of first engaging projections and the plurality of second engaging projections are alternately arranged in the circumferential direction.

[0020] The friction disk according to the eleventh embodiment is configured as follows in any one of the friction disks according to the first to tenth embodiments. The first friction member has a first sliding surface and a first mounting surface. The first sliding surface faces the first side in the axial direction. The first mounting surface faces the second side in the axial direction. The first mounting surface abuts against the support plate. The surface roughness of the first mounting surface is larger than that of the first sliding surface.

[0021] The vibration damping device according to the twelfth embodiment includes a vibration damping unit and a torque limiter unit. The vibration damping unit has an input rotating member, an output rotating member, an elastic member, and a friction disk according to any one of the first to eleventh embodiments. The elastic member is configured to elastically connect the input rotating member and the output rotating member. The friction disk is mounted on the input rotating member or the output rotating member. The torque limiter unit is configured to frictionally engage with the friction disk. The torque limiter unit clamps the friction disk in the axial direction.

[0022] The vibration damping device according to the thirteenth embodiment is configured as follows in the vibration damping device according to the twelfth embodiment. The torque limiter unit has a pressure plate and a biasing member. The biasing member biases the pressure plate toward the friction disk. The biasing member has an abutting portion that abuts against the pressure plate. The abutting portion overlaps with the first engaging projection when viewed from the axial direction.

[0023] Advantages of the Invention

[0024] According to the present invention, cost reduction can be achieved. Description of the Drawings

[0025] Figure 1 is a front view of the vibration damping device.

[0026] Figure 2 is Figure 1 a cross-sectional view taken along line II-II of

[0027] Figure 3 is a cross-sectional view of the friction disk.

[0028] Figure 4 is a perspective view of the support plate.

[0029] Figure 5 It is a cross-sectional view of the friction disk.

[0030] Figure 6 It is a cross-sectional view of the friction disk.

[0031] Figure 7 It is Figure 3 a cross-sectional view taken along line VII-VII of

[0032] Figure 8 It is a view showing the first or second engagement protrusion when viewed axially.

[0033] Figure 9 It is an enlarged cross-sectional view of the first engagement protrusion.

[0034] Figure 10 It is a front view of the first engagement protrusion.

[0035] Figure 11 It is a cross-sectional view of the torque limiter unit and the friction disk.

[0036] Figure 12 It is a front view of the friction disk according to the modified example.

[0037] Figure 13 It is Figure 12 a cross-sectional view taken along line XIII-XIII of

[0038] Explanation of reference numerals

[0039] 3: Torque limiter unit

[0040] 4: Vibration damping unit

[0041] 41: Input rotating member

[0042] 42: Output rotating member

[0043] 43: Elastic member

[0044] 5: Friction disk

[0045] 51: Support plate

[0046] 511: First side

[0047] 512: Second side

[0048] 513: Slit

[0049] 513a: First slit

[0050] 513b: Second slit

[0051] 514: Anchoring portion

[0052] 514a: First anchoring part

[0053] 514b: Second anchoring part

[0054] 515: First engaging convex part

[0055] 516: Through hole

[0056] 517: Second engaging convex part

[0057] 518: Concave part

[0058] 52: First friction member

[0059] 521: First engaging concave part

[0060] 522: Small-diameter part

[0061] 523: Large-diameter part

[0062] 53: Second friction member

[0063] 531: Second engaging concave part

[0064] 532: Large-diameter part

[0065] 533: Small-diameter part

[0066] 100: Vibration damping device. Detailed implementation mode

[0067] Hereinafter, the friction disk 5 and the vibration damping device 100 according to the present embodiment will be described with reference to the drawings. In addition, in the following description, the axial direction is the direction in which the rotation axis O of the friction disk 5 and the vibration damping device 100 extends. In addition, the circumferential direction is the circumferential direction of a circle centered on the rotation axis O, and the radial direction is the radial direction of a circle centered on the rotation axis O. In addition, the first axial side refers to Figure 2 the left side, and the second axial side refers to Figure 2 the right side.

[0068] Figure 1 is the front view of the vibration damping device, Figure 2 is Figure 1 the sectional view taken along line II-II of Figure 1 and Figure 2 As shown, the vibration damping device 100 has a torque limiter unit 3 and a vibration damping unit 4. The torque limiter unit 3 and the vibration damping unit 4 rotate substantially integrally with each other. The vibration damping device 100 is provided between an internal combustion engine (not shown) and an output side component (not shown). In addition, the output side component is, for example, an electric motor or a transmission. The vibration damping device 100 is mounted on a flywheel (not shown). For example, in Figure 2In this case, the internal combustion engine is disposed on the left side of the vibration damping device 100, and the output side component is disposed on the right side of the vibration damping device 100. The vibration damping device 100 is configured to limit the torque transmitted between the internal combustion engine and the output side component and to attenuate torque fluctuations.

[0069] [Vibration damping unit]

[0070] The vibration damping unit 4 is mounted on the torque limiter unit 3. The vibration damping unit 4 is configured to attenuate rotational fluctuations. The vibration damping unit 4 includes an input rotating member 41, an output rotating member 42, an elastic member 43, and a friction disk 5.

[0071] <Input rotating member>

[0072] The input rotating member 41 has a first plate 41a and a second plate 41b. Both the first plate 41a and the second plate 41b are annular members having a central hole. The first plate 41a and the second plate 41b rotate integrally with each other. Further, the first plate 41a and the second plate 41b cannot move relative to each other in the axial direction.

[0073] The first plate 41a and the second plate 41b are arranged at intervals in the axial direction. The second plate 41b is disposed on the second side in the axial direction with respect to the first plate 41a.

[0074] The first plate 41a and the second plate 41b each have a plurality of window portions 411a, 411b. In addition, in the present embodiment, the first plate 41a and the second plate 41b each have four window portions 411a, 411b, but their numbers are not limited thereto.

[0075] The respective window portions 411a, 411b are arranged at intervals in the circumferential direction. The respective window portions 411a, 411b are configured to receive the elastic member 43.

[0076] <Output rotating member>

[0077] The output rotating member 42 is configured to transmit the torque from the input rotating member 41 to the output side component. The output rotating member 42 is arranged between the first plate 41a and the second plate 41b in the axial direction. The output rotating member 42 is configured to be rotatable relative to the first plate 41a and the second plate 41b.

[0078] The output rotating member 42 has a hub 421 and a flange plate 422. The hub 421 and the flange plate 422 are integrally formed as one member, but may also be configured as separate members.

[0079] The hub 421 is cylindrical and is disposed in the central holes of the first plate 41a and the second plate 41b. A spline hole extending in the axial direction is formed in the inner peripheral portion of the hub 421. The input shaft of the output side component can be spline-fitted with the spline hole.

[0080] The flange plate 422 extends radially from the outer peripheral surface of the hub 421. The flange plate 422 is formed in a ring shape. The flange plate 422 is configured to be rotatable relative to the first plate 41a and the second plate 41b. The flange plate 422 is axially disposed between the first plate 41a and the second plate 41b.

[0081] The flange plate 422 has a plurality of receiving holes 423. In addition, in the present embodiment, the flange plate 422 has four receiving holes 423, but the number thereof is not limited thereto. The respective receiving holes 423 are circumferentially spaced apart from each other. Each receiving hole 423 is configured to receive the elastic member 43. Each receiving hole 423 is disposed at a position overlapping with the respective window portions 411a, 411b when viewed axially.

[0082] <Elastic member>

[0083] The elastic member 43 is configured to elastically connect the input rotating member 41 and the output rotating member 42 in the rotational direction. The elastic member 43 is, for example, a helical spring.

[0084] The elastic member 43 is received in the receiving hole 423 of the output rotating member 42. In addition, the elastic member 43 is received in the window portion 411a of the first plate 41a and is also received in the window portion 411b of the second plate 41b.

[0085] <Friction disk>

[0086] The friction disk 5 is mounted on the outer peripheral end portion of the input rotating member 41. Specifically, the friction disk 5 is mounted on the first plate 41a by the fastening member 37. In addition, the friction disk 5 may be mounted on the second plate 41b. The friction disk 5 rotates integrally with the input rotating member 41. In addition, as the fastening member 37, a rivet can be exemplified.

[0087] Figure 3 is an enlarged cross-sectional view of the friction disk 5. As Figure 2 and Figure 3 shown, the friction disk 5 is rotatable about the rotation axis O. The friction disk 5 is in a ring shape. The friction disk 5 has a support plate 51, a first friction member 52, and a second friction member 53. The support plate 51, the first friction member 52, and the second friction member 53 rotate integrally with each other.

[0088] <Support plate>

[0089] Figure 4 is a perspective view of the support plate 51, Figure 5 and Figure 6 is an enlarged cross-sectional view of the friction disk 5 for showing the engaging portion, Figure 7 is Figure 3 the cross-sectional view taken along line VII-VII of Figures 3 to 7As shown, the support plate 51 is an annular plate. The support plate 51 is configured to be rotatable about the rotation axis O.

[0090] The support plate 51 is mounted on the first plate 41a. For example, the support plate 51 is mounted on the first plate 41a by the fastening member 37. In addition, although the support plate 51 is a separate member from the first plate 41a, the support plate 51 may also be integrally formed with the first plate 41a as one member.

[0091] The support plate 51 has a first side surface 511, a second side surface 512, a plurality of slits 513, a plurality of anchoring portions 514, a plurality of first engaging convex portions 515, a plurality of through holes 516, a plurality of second engaging convex portions 517, and a plurality of concave portions 518. In addition, the support plate 51 has a plurality of insertion holes 519 into which a jig for positioning is inserted.

[0092] The first side surface 511 is the surface of the two side surfaces of the support plate 51 that faces the first side in the axial direction. The first side surface 511 is annular when viewed from the axial direction. The first side surface 511 has no stepped layers and its axial position is fixed. That is, the entire first side surface 511 is located on the same plane.

[0093] The second side surface 512 is the surface of the two side surfaces of the support plate 51 that faces the second side in the axial direction. The second side in the axial direction is the opposite side of the first side in the axial direction. The second side surface 512 is annular when viewed from the axial direction. The second side surface 512 has no stepped layers and its axial position is fixed. That is, the entire second side surface 512 is located on the same plane.

[0094] Each slit 513 extends from the outer peripheral surface of the support plate 51 radially inward. The respective receiving holes 513 are arranged at intervals from each other in the circumferential direction. Each slit 513 penetrates the support plate 51 in the thickness direction.

[0095] As Figure 7 shown, the anchoring portion 514 projects toward the second side in the axial direction from the edge of the slit 513. In addition, in the present embodiment, the anchoring portion 514 only projects toward the second side in the axial direction, but the anchoring portion 514 may also project toward the first side in the axial direction. The amount of projection of the anchoring portion 514 is not particularly limited, for example, it is about 0.1 to 0.5 mm.

[0096] The anchoring portion 514 is formed along the edge portion of the slit 513. In addition, the anchoring portion 514 can be formed continuously or intermittently along the edge portion of the slit 513. The anchoring portion 514 protrudes from the second side surface 512 of the support plate 51 toward the second side in the axial direction. The anchoring portion 514 bites into the second friction member 53. Through this anchoring portion 514, the support plate 51 and the second friction member 53 can be rotated integrally more reliably. In addition, the anchoring portion 514 can be formed on the edge portions of all the slits 513 or on the edge portions of some of the slits 513. When the anchoring portion 514 protrudes toward the first side in the axial direction, the anchoring portion 514 bites into the first friction member 52.

[0097] As Figure 4 and Figure 5 shown, the first engaging convex portion 515 protrudes from the first side surface 511 toward the first side in the axial direction. The first engaging convex portion 515 is disposed between a pair of circumferentially adjacent slits 513. The first engaging convex portion 515 has a circular shape when viewed from the axial direction. In addition, the first engaging convex portion 515 can be formed in an elliptical shape (see Figure 8 ).

[0098] The through hole 516 extends in the axial direction within the first engaging convex portion 515. Therefore, the first engaging convex portion 515 becomes a cylindrical shape extending in the axial direction. In addition, the through hole 516 has a circular shape when viewed from the axial direction. The through hole 516 penetrates the support plate 51 in the axial direction. The first engaging convex portion 515 and the through hole 516 can be formed, for example, by hole flanging.

[0099] Figure 9 is an enlarged cross-sectional view of the first engaging convex portion 515, Figure 10 is a view showing the first engaging convex portion 515 when viewed from the axial direction. As Figure 9 and Figure 10 shown, the first engaging convex portion 515 has a first main body portion 515a and a first pressing portion 515b. The first main body portion 515a extends in the axial direction. The first main body portion 515a has a cylindrical shape. That is, the through hole 516 penetrates the first main body portion 515a in the axial direction.

[0100] The first pressing portion 515b extends outward from the outer peripheral surface of the front end portion (the first side end portion in the axial direction) of the first main body portion 515a. The first pressing portion 515b presses the first friction member 52. Specifically, the first pressing portion 515b is formed by riveting the front end portion of the first engaging convex portion 515. The first friction member 52 is fixed to the support plate 51 by sandwiching the first friction member 52 between the first pressing portion 515b and the first side surface 511 of the support plate 51. The first pressing portion 515b is composed of a plurality of pressing pieces 515c. In addition, the first pressing portion 515b may also be an annular shape. The first pressing portion 515b presses the stepped portion formed at the boundary between the small-diameter portion 522 and the large-diameter portion 523 described later.

[0101] As Figure 6 shown, the second engaging convex portion 517 protrudes from the second side surface 512 toward the second side in the axial direction. The second engaging convex portion 517 has a solid cylindrical shape. The second engaging convex portion 517 is circular when viewed from the axial direction. In addition, the second engaging convex portion 517 may be formed in an elliptical shape (refer to Figure 8 ).

[0102] The second engaging convex portion 517 is disposed between a pair of slits 513 adjacent in the circumferential direction. Each second engaging convex portion 517 and each first engaging convex portion 515 are alternately arranged in the circumferential direction. That is, on the second side surface 512, the second engaging convex portion 517 and the through hole 516 are alternately arranged in the circumferential direction.

[0103] The concave portion 518 is formed on the first side surface 511 of the support plate 51. The concave portion 518 is recessed from the first side surface 511 toward the second side in the axial direction. That is, the concave portion 518 opens toward the first side in the axial direction. In addition, the concave portion 518 does not penetrate the support plate 51.

[0104] The concave portion 518 is circular when viewed from the axial direction. The concave portion 518 overlaps with the second engaging convex portion 517 when viewed from the axial direction. The concave portion 518 is larger than the second engaging convex portion 517 when viewed from the axial direction. The second engaging convex portion 517 and the concave portion 518 can be formed by, for example, embossing.

[0105] The concave portion 518 and the through hole 516 are alternately arranged in the circumferential direction. That is, on the first side surface 511, the concave portion 518 and the first engaging convex portion 515 are alternately arranged in the circumferential direction.

[0106] <First Friction Member and Second Friction Member>

[0107] As Figure 2 , Figure 3 , Figures 5 to 7As shown, the first friction member 52 is annular. The first friction member 52 is mounted on the first side surface 511 of the support plate 51. The first friction member 52 rotates integrally with the support plate 51. Therefore, the friction disk 5 is configured to be frictionally engaged with the side plate 31 via the first friction member 52.

[0108] The first friction member 52 has a first sliding surface 524 and a first mounting surface 525. The first sliding surface 524 is a surface facing the opposite side of the support plate 51 in the axial direction. That is, the first sliding surface 524 faces the first side in the axial direction. The first sliding surface 524 abuts against the side plate 31. When the friction disk 5 slides relative to the torque limiter unit 3, the first sliding surface 524 slides relative to the side plate 31.

[0109] The first mounting surface 525 is a surface facing the support plate 51 side in the axial direction. That is, the first mounting surface 525 faces the second side in the axial direction. The first mounting surface 525 abuts against the support plate 51.

[0110] The first mounting surface 525 has a surface roughness different from that of the first sliding surface 524. For example, the surface roughness (arithmetic mean roughness) of the first mounting surface 525 is larger than that of the first sliding surface 524. For example, by grinding the first sliding surface 524 without grinding the first mounting surface 525, the surface roughness of the first mounting surface 525 can be relatively increased.

[0111] The second friction member 53 is annular. The second friction member 53 is mounted on the second side surface 512 of the support plate 51. The second friction member 53 rotates integrally with the support plate 51. Therefore, the friction disk 5 is configured to be frictionally engaged with the pressure plate 33 via the second friction member 53.

[0112] The second friction member 53 has a second sliding surface 534 and a second mounting surface 535. The second sliding surface 534 is a surface facing the opposite side of the support plate 51 in the axial direction. That is, the second sliding surface 534 faces the second side in the axial direction. The second sliding surface 534 abuts against the pressure plate 33. When the friction disk 5 slides relative to the torque limiter unit 3, the second sliding surface 534 slides relative to the pressure plate 33.

[0113] The second mounting surface 535 is a surface facing the support plate 51 side in the axial direction. That is, the second mounting surface 535 faces the first side in the axial direction. The second mounting surface 535 abuts against the support plate 51.

[0114] The second mounting surface 535 has a surface roughness different from that of the second sliding surface 534. For example, the surface roughness (arithmetic mean roughness) of the second mounting surface 535 is larger than that of the second sliding surface 534. For example, by grinding the second sliding surface 534 without grinding the second mounting surface 535, the surface roughness of the second mounting surface 535 can be relatively increased.

[0115] AsFigure 5 As shown, the first friction member 52 has a plurality of first engaging recesses 521. The respective first engaging recesses 521 are circumferentially arranged at intervals. When viewed axially, each of the first engaging recesses 521 overlaps with each of the first engaging protrusions 515. Each of the first engaging recesses 521 is formed on the surface of the first friction member 52 on the side of the support plate 51. The first engaging recess 521 is recessed toward the first side in the axial direction. Further, in the present embodiment, the first engaging recess 521 penetrates the first friction member 52 in the axial direction.

[0116] The first engaging recess 521 engages with the first engaging protrusion 515 of the support plate 51. That is, the first engaging protrusion 515 is disposed within the first engaging recess 521. Further, the clearance between the first engaging protrusion 515 and the first engaging recess 521 is about 0.05 to 0.30 mm on one side. Thus, since the first engaging protrusion 515 engages with the first engaging recess 521, the first friction member 52 and the support plate 51 rotate integrally. Further, when viewed axially, the first engaging recess 521 is circular.

[0117] Specifically, the first engaging recess 521 has a small-diameter portion 522 and a large-diameter portion 523. The large-diameter portion 523 is disposed on the first side in the axial direction with respect to the small-diameter portion 522. The small-diameter portion 522 and the large-diameter portion 523 communicate with each other.

[0118] The small-diameter portion 522 opens toward the support plate 51. That is, the small-diameter portion 522 opens toward the second side in the axial direction. The small-diameter portion 522 houses the first engaging protrusion 515.

[0119] The large-diameter portion 523 opens toward the side opposite to the support plate 51. That is, the large-diameter portion 523 opens toward the first side in the axial direction. When viewed axially, the large-diameter portion 523 is larger than the small-diameter portion 522. That is, the diameter of the large-diameter portion 523 is larger than the diameter of the small-diameter portion 522. The first pressing portion 515b of the first engaging protrusion 515 presses the stepped portion between the large-diameter portion 523 and the small-diameter portion 522.

[0120] As Figure 6 shown, the second friction member 53 has a plurality of second engaging recesses 531. The respective second engaging recesses 531 are circumferentially arranged at intervals. When viewed axially, each of the second engaging recesses 531 overlaps with each of the second engaging protrusions 517. Each of the second engaging recesses 531 is formed on the surface of the second friction member 53 on the side of the support plate 51. The second engaging recess 531 is recessed toward the second side in the axial direction. Further, in the present embodiment, the second engaging recess 531 penetrates the second friction member 53 in the axial direction.

[0121] The second engaging recess 531 engages with the second engaging projection 517 of the support plate 51. That is, the second engaging projection 517 is disposed within the second engaging recess 531. In addition, the clearance between the second engaging projection 517 and the second engaging recess 531 is about 0.05 to 0.60 mm on one side. Thus, since the second engaging projection 517 engages with the second engaging recess 531, the second friction member 53 rotates integrally with the support plate 51. In addition, the second engaging recess 531 is circular in shape when viewed from the axial direction.

[0122] Specifically, the second engaging recess 531 has a large-diameter portion 532 and a small-diameter portion 533. The small-diameter portion 533 is disposed on the second side in the axial direction with respect to the large-diameter portion 532. The large-diameter portion 532 and the small-diameter portion 533 communicate with each other.

[0123] The large-diameter portion 532 opens toward the support plate 51. That is, the large-diameter portion 532 opens to the first side in the axial direction. The large-diameter portion 532 houses the second engaging projection 517.

[0124] The small-diameter portion 533 opens to the side opposite to the support plate 51. That is, the small-diameter portion 533 opens to the second side in the axial direction. The small-diameter portion 533 is smaller than the large-diameter portion 532 when viewed from the axial direction. That is, the diameter of the small-diameter portion 533 is smaller than the diameter of the large-diameter portion 532. In addition, the small-diameter portion 533 is smaller than the second engaging projection 517 when viewed from the axial direction.

[0125] According to this configuration, when the front and back surfaces of the second friction member 53 are different, the front and back surfaces of the second friction member 53 can be correctly identified, and the second friction member 53 can be mounted on the support plate 51.

[0126] When a torque equal to or greater than a specified value is input to the vibration damping device 100, the friction disk 5 slides on the side plate 31 and the pressure plate 33 via the first friction member 52 and the second friction member 53 and rotates relative to the side plate 31 and the pressure plate 33. On the other hand, when a torque less than the specified value is input, the friction disk 5 rotates integrally with the side plate 31 and the pressure plate 33.

[0127] [Torque Limiter Unit]

[0128] As Figure 2 shown, the torque limiter unit 3 is configured to be rotatable about the rotation axis O. The torque limiter unit 3 is disposed on the second side in the axial direction with respect to the flywheel. The torque limiter unit 3 is annular. The torque limiter unit 3 is mounted on the flywheel.

[0129] The torque limiter unit 3 is configured to limit the torque transmitted between the flywheel and the vibration damping unit 4. That is, the torque limiter unit 3 is configured to limit the transmission of a torque equal to or greater than a specified value in the vibration damping device 100. The torque limiter unit 3 is configured to frictionally engage with the friction disk 5. In addition, the torque limiter unit 3 clamps the friction disk 5 in the axial direction.

[0130] The torque limiter unit 3 includes a side plate 31, a cover plate 32, a pressure plate 33, and a disc spring 34 (an example of a biasing member).

[0131] The side plate 31 and the cover plate 32 are attached to the flywheel. The side plate 31 and the cover plate 32 rotate integrally with the flywheel. The side plate 31 and the cover plate 32 are annular. The cover plate 32 is disposed on the second axial side with respect to the side plate 31. The thickness of the cover plate 32 is thinner than that of the side plate 31.

[0132] The pressure plate 33 is annular. The pressure plate 33 is disposed between the side plate 31 and the cover plate 32 in the axial direction. Specifically, the pressure plate 33 is disposed between the second friction member 53 and the disc spring 34 in the axial direction. The pressure plate 33 is configured to rotate integrally with the side plate 31. In addition, the pressure plate 33 can move axially with respect to the side plate 31.

[0133] The disc spring 34 is disposed between the cover plate 32 and the pressure plate 33 in the axial direction. The disc spring 34 biases the pressure plate 33 toward the first axial side. That is, the disc spring 34 biases the pressure plate 33 toward the friction disc 5. Thereby, the friction disc 5 is clamped between the pressure plate 33 and the side plate 31.

[0134] Figure 11 is a cross-sectional view showing the arrangement relationship between the friction disc 5 and the torque limiter unit 3. As Figure 11 shown, the disc spring 34 has an abutting portion 341. The abutting portion 341 abuts against the pressure plate 33. The abutting portion 341 is the inner peripheral end portion or the outer peripheral end portion of the disc spring 34. In addition, in the present embodiment, the inner peripheral end portion of the disc spring 34 becomes the abutting portion 341. The abutting portion 341 overlaps with each of the first engaging convex portions 515 when viewed axially. That is, the abutting portion 341 and each of the first engaging convex portions 515 are in the same radial position. In addition, the abutting portion 341 of the disc spring 34 also overlaps with the second engaging convex portion 517 when viewed axially.

[0135] [Modification Example]

[0136] The present invention is not limited to the above-described embodiment, and various deformations or modifications can be made without departing from the scope of the present invention. In addition, the following modification examples can be applied simultaneously.

[0137] (a) In the above-described embodiment, the support plate 51 has the anchoring portion 514 that protrudes only toward the first axial side or only toward the second axial side, but the configuration of the support plate 51 is not limited thereto.

[0138] Figure 12 is a front view of the friction disc 5, Figure 13 is Figure 12 a cross-sectional view taken along line XIII-XIII of Figure 12 and Figure 13As shown, the support plate 51 may also have a plurality of first slits 513a, a plurality of second slits 513b, a plurality of first anchoring portions 514a, and a plurality of second anchoring portions 514b.

[0139] The plurality of first slits 513a and the plurality of second slits 513b are alternately arranged in the circumferential direction. The plurality of first slits 513a and the plurality of second slits 513b are arranged at intervals from each other in the circumferential direction.

[0140] The first anchoring portion 514a protrudes from the edge portion of the first slit 513a toward the first side in the axial direction. The first anchoring portion 514a bites into the first friction member 52.

[0141] The second anchoring portion 514b protrudes from the edge portion of the second slit 513b toward the second side in the axial direction. That is, the second anchoring portion 514b protrudes toward the opposite side of the first anchoring portion 514a. The second anchoring portion 514b bites into the second friction member 53. The first fixing portion 514a and the second fixing portion 514b are alternately arranged in the circumferential direction.

[0142] The first engaging convex portion 515 is arranged between the first slit 513a and the second slit 513b in the circumferential direction. That is, the first engaging convex portion 515 is arranged between the first anchoring portion 514a and the second anchoring portion 514b in the circumferential direction. In addition, the second engaging convex portion 517 is also arranged between the first slit 513a and the second slit 513b in the circumferential direction.

[0143] (b) In the above-described embodiment, the support plate 51 has the anchoring portion 514, but it may not have the anchoring portion 514.

[0144] (c) In the above-described embodiment, the first engaging convex portion 515 and the second engaging convex portion 517 are formed in a circular shape or an elliptical shape when viewed from the axial direction, but the shapes of the first engaging convex portion 515 and the second engaging convex portion 517 are not limited thereto. For example, the first engaging convex portion 515 and the second engaging convex portion 517 may be rectangular when viewed from the axial direction, or may have other shapes.

[0145] (d) In the above-described embodiment, the side plate 31 is arranged on the first side in the axial direction with respect to the friction disk 5, and the pressure plate 33 is arranged on the second side in the axial direction, but the configuration is not limited thereto. For example, the side plate 31 may be arranged on the second side in the axial direction with respect to the friction disk 5, and the pressure plate 33 may be arranged on the first side in the axial direction.

[0146] (e) In the above-described embodiment, the internal combustion engine is arranged on the first side in the axial direction with respect to the vibration damping device 100, and the output side component is arranged on the second side in the axial direction, but the arrangement of the vibration damping device 100 is not limited thereto. For example, the internal combustion engine may be arranged on the second side in the axial direction with respect to the vibration damping device 100, and the output side component may be arranged on the first side in the axial direction.

Claims

1. A friction disc having: The support plate has a first side surface and a second side surface, wherein the first side surface faces the first side in the axial direction, and the second side surface faces the second side in the axial direction; a first friction member, mounted on the first side surface of the support plate; as well as a second friction member, mounted on the second side surface of the support plate, The support plate has: A first engaging protrusion protrudes from the first side surface toward a first side in the axial direction; A through hole extending axially in the first engaging protrusion; A second engaging protrusion protrudes from the second side surface toward a second side in the axial direction; as well as The concave portion is arranged at a position overlapping with the second engaging convex portion when viewed from the axial direction, and is recessed from the first side surface toward the second side in the axial direction, The first friction member has a first engaging recessed portion engaged with the first engaging convex portion. The second friction member has a second engaging recessed portion engaged with the second engaging protruding portion.

2. The friction disc according to claim 1, wherein: The first engaging protrusion has: A first main body portion extending in the axial direction; and The first pressing portion extends outward from the outer peripheral surface of the front end portion of the first main body portion and presses the first friction member.

3. The friction disc according to claim 1, wherein: At least one of the first engaging protrusion and the second engaging protrusion has an elliptical shape when viewed from the axial direction.

4. The friction disc according to claim 1, wherein: The support plate has: A slit extending radially inward from the outer peripheral surface; as well as The anchor portion protrudes from the edge of the slit toward the second side in the axial direction and bites into the second friction member.

5. The friction disc according to claim 1, wherein: The support plate has: A plurality of first slits extend radially inward from the outer peripheral surface and are arranged at intervals from each other in the circumferential direction; A plurality of second slits extending radially inward from the outer peripheral surface and arranged at intervals from each other in the circumferential direction; a plurality of first anchoring portions, protruding from the edge of each of the first slits toward the first side in the axial direction and biting into the first friction member; as well as A plurality of second anchor portions protrude from the edge of each of the second slits toward the second side in the axial direction and bite into the second friction material.

6. The friction disc according to claim 5, wherein: The first slits and the second slits are alternately arranged in the circumferential direction.

7. The friction disc according to claim 5, wherein: At least one of the first engaging protrusion and the second engaging protrusion is arranged between the first slit and the second slit in the circumferential direction.

8. The friction disc according to claim 1, wherein: The first engaging recess has: a small diameter portion, which opens toward the support plate in the axial direction and receives the first engaging protrusion; and The large diameter portion communicates with the small diameter portion in the axial direction and opens toward the opposite side of the support plate, and is larger than the small diameter portion when viewed in the axial direction.

9. The friction disc according to claim 1, wherein: The second engaging recess has: a large diameter portion, which opens toward the support plate in the axial direction and receives the second engaging protrusion; and The small diameter portion communicates with the large diameter portion in the axial direction and opens toward the opposite side of the support plate. The small diameter portion is smaller than the large diameter portion when viewed in the axial direction and is smaller than the second engagement protrusion when viewed in the axial direction.

10. The friction disc according to claim 1, wherein: The support plate has a plurality of the first engaging protrusions and a plurality of the second engaging protrusions. The plurality of first engaging protrusions and the plurality of second engaging protrusions are alternately arranged in the circumferential direction.

11. The friction disc according to claim 1, wherein: The first friction member has a first sliding surface and a first mounting surface, the first sliding surface faces the first axial side, the first mounting surface faces the second axial side and abuts against the support plate, The surface roughness of the first mounting surface is greater than that of the first sliding surface.

12. A vibration reduction device comprising: A vibration reduction unit comprising an input rotating member, an output rotating member, an elastic member, and a friction disc as claimed in any one of claims 1 to 11, wherein the elastic member is configured to elastically connect the input rotating member and the output rotating member, and the friction disc is mounted on the input rotating member or the output rotating member; and The torque limiter unit is configured to frictionally engage with the friction disk and to clamp the friction disk in the axial direction.

13. The vibration reduction device according to claim 12, wherein: The torque limiter unit includes a pressure plate and a force applying member, wherein the force applying member applies force to the pressure plate toward the friction disk. The force applying member has a contact portion that contacts the pressure plate. The abutment portion overlaps with the first engagement projection when viewed from the axial direction.

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