Torque limiter and power transmission device

Abstract

The present application relates to a torque limiter and a power transmission device. A torque limiter capable of being low-cost is provided. The torque limiter is provided with a first side plate, a friction plate, a pressure plate, and a force applying member. The first side plate has a ring-shaped portion and a cylindrical portion. The ring-shaped portion extends in the circumferential direction. The cylindrical portion extends in the axial direction from the outer peripheral end portion of the ring-shaped portion. The friction plate is configured to be able to rotate in opposition to the first side plate. The pressure plate sandwiches the friction plate in cooperation with the first side plate. The force applying member applies force to the pressure plate in the axial direction toward the first side plate.

Description

Technical Field

[0001] This invention relates to torque limiters and power transmission devices. Background Technology

[0002] The power transmission device disclosed in Patent Document 1 includes a flywheel, a torque limiter, and a vibration damping unit. The flywheel has an inertia ring. The torque limiter is mounted on the inertia ring.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2024-030506 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] The technical problem of this invention is to provide a torque limiter that can be cost-effective.

[0008] Technical solutions for solving technical problems

[0009] The torque limiter according to the first embodiment includes a first side plate, a friction plate, a pressure plate, and a force-applying member. The first side plate has an annular portion and a cylindrical portion. The annular portion extends circumferentially. The cylindrical portion extends axially from the outer peripheral end of the annular portion. The friction plate is configured to rotate relative to the first side plate. The pressure plate cooperates with the first side plate to clamp the friction plate. The force-applying member applies force to the pressure plate axially toward the first side plate.

[0010] According to this structure, since the first side plate has a cylindrical portion extending axially, this cylindrical portion can function as at least a part of the inertia ring. Therefore, at least a part of the inertia ring can be omitted. It should be noted that the inertia ring is usually formed by casting, while the first side plate is usually formed by sheet metal processing or stamping of a metal sheet. Here, the first side plate formed by sheet metal processing or stamping is cheaper than the inertia ring formed by casting. Therefore, the torque limiter can be reduced in cost.

[0011] The torque limiter in the second embodiment, compared to the torque limiter in the first embodiment, further includes an inertial component. The inertial component is configured to overlap with the cylindrical portion when viewed radially and with the annular portion when viewed axially.

[0012] The torque limiter involved in the third approach is configured in the manner described in the torque limiter involved in the second approach, as follows: The inertial component has a threaded hole extending axially.

[0013] The torque limiter involved in the fourth embodiment is configured in the manner described in the torque limiter involved in the second or third embodiment, as follows: The inertial component is a ring extending circumferentially. The thickness of the inertial component is greater than the thickness of the first side plate.

[0014] The torque limiter involved in the fifth method, as in the torque limiters involved in any of the second to fourth methods, is configured as follows: The inertial component is a nut that is thicker than the plate of the first side plate.

[0015] The torque limiter according to the sixth embodiment, in any of the torque limiters according to the second to fifth embodiments, is configured as follows: The annular portion has a bulge that bulges out in the same direction as the cylindrical portion. An inertial member is radially disposed between the cylindrical portion and the bulge.

[0016] The torque limiter in the seventh embodiment, as in the torque limiters of any of the first to sixth embodiments, further includes a second side plate. A friction plate, a pressure plate, and a force-applying component are axially disposed between the first and second side plates.

[0017] The power transmission device according to the eighth method includes a torque limiter and a vibration damping unit as described in any of the first to seventh methods. The vibration damping unit includes a first rotating component, a second rotating component, and an elastic component. The first rotating component is configured to rotate integrally with the friction plate. The second rotating component is configured to rotate relative to the first rotating component. The elastic component elastically connects the first and second rotating components.

[0018] The power transmission device according to the ninth embodiment is configured in the same way as the power transmission device according to the eighth embodiment. The first rotating member has an outer peripheral surface that abuts against the inner peripheral surface of the cylindrical portion.

[0019] The power transmission device according to the tenth embodiment is configured as follows, in contrast to the power transmission device according to the ninth embodiment: The outer peripheral surface of the first rotating member has an abutting portion and a non-abutting portion. The abutting portion extends in an arc shape when viewed axially. The abutting portion abuts against the inner peripheral surface of the cylindrical portion. The non-abutting portion extends in a straight line when viewed axially. The non-abutting portion does not abut against the inner peripheral surface of the cylindrical portion.

[0020] The power transmission device according to the eleventh embodiment, in any of the power transmission devices according to the eighth to tenth embodiments, further includes a drive plate. The drive plate is configured to receive torque from the prime mover. The first side plate is configured to rotate integrally with the drive plate.

[0021] The power transmission device according to the twelfth embodiment is configured as follows, in the power transmission device according to the eleventh embodiment: The cylindrical portion extends axially from the outer peripheral end of the annular portion away from the drive plate.

[0022] The power transmission device according to the thirteenth embodiment is configured as follows, in the power transmission device according to the eleventh embodiment: The cylindrical portion extends axially from the outer peripheral end of the annular portion toward the drive plate.

[0023] Invention Effects

[0024] According to the present invention, the torque limiter can be made cheaper. Attached Figure Description

[0025] Figure 1 This is the front view of the power transmission device.

[0026] Figure 2 yes Figure 1 Sectional view along line II-II.

[0027] Figure 3 This is an enlarged sectional view of the power transmission device.

[0028] Figure 4 This is the front view of the power transmission device involved in the modified example.

[0029] Figure 5 yes Figure 4 VV-line sectional view.

[0030] Figure 6 This is a cross-sectional view of the power transmission device involved in the modified example.

[0031] Figure 7 This is a cross-sectional view of the power transmission device involved in the modified example.

[0032] Explanation of reference numerals in the attached figures

[0033] 3: Torque limiter; 31: First side plate; 311: Annular part; 311a: First bulge part; 312: Cylindrical part; 32: Second side plate; 324: Outer peripheral surface; 324a: Abutting part; 324b: Non-abutting part; 33: Friction plate; 34: Pressure plate; 35: Force-applying component; 36: Inertial component; 361: Threaded hole; 4: Vibration damping unit; 41: First rotating component; 42: Second rotating component; 43: Elastic component; 100: Power transmission device; 110: Drive plate; 112: Bolt. Detailed Implementation

[0034] Hereinafter, the torque limiter 3 and the power transmission device 100 according to this embodiment will be described with reference to the accompanying drawings. It should be noted that in the following description, axial direction refers to the direction in which the rotation axis O of the torque limiter 3 and the power transmission device 100 extends. Furthermore, circumferential direction refers to the circumferential direction of the circle centered on the rotation axis O, and radial direction refers to the radial direction of the circle centered on the rotation axis O. Additionally, axial first side means... Figure 2The right side, the second side of the axis, means Figure 2 On the left side.

[0035] Figure 1 This is the front view of the power transmission device 100. Figure 2 yes Figure 1 Sectional view along line II-II. (See also...) Figure 1 as well as Figure 2 As shown, the power transmission device 100 includes a drive plate 110, a torque limiter 3, and a vibration damping unit 4. The drive plate 110 and the torque limiter 3 are configured to rotate as a single unit. The torque limiter 3 and the vibration damping unit 4 can rotate relative to each other, but they are essentially rotating as a single unit. When the torque transmitted to the power transmission device 100 exceeds a predetermined value, the torque limiter 3 and the vibration damping unit 4 rotate relative to each other.

[0036] The power transmission device 100 is disposed between the prime mover (not shown) and the output-side component (not shown). It should be noted that the prime mover refers to, for example, an internal combustion engine. Furthermore, the output-side component refers to, for example, an electric motor or a transmission. The internal combustion engine is positioned on the second axial side relative to the power transmission device 100. Figure 2 (on the left side), the output side component is arranged on the first side of the axial direction relative to the power transmission device 100 ( Figure 2 (Right side). The power transmission device 100 is configured to limit the torque transmitted between the internal combustion engine and the output-side components, and to attenuate torque fluctuations.

[0037] [Driver Board]

[0038] The drive plate 110 is configured to receive torque from the prime mover. Specifically, the drive plate 110 is mounted to the crankshaft (not shown) for example by a plurality of bolts 111. The drive plate 110 has a plurality of through holes 110a. The through holes 110a are spaced apart in the circumferential direction. The drive plate 110 is circular.

[0039] [Vibration Damping Unit]

[0040] The vibration damping unit 4 is mounted on the torque limiter 3. The vibration damping unit 4 is configured to attenuate rotational fluctuations. The vibration damping unit 4 has a first rotating component 41, a second rotating component 42, and a plurality of elastic components 43.

[0041] <First Rotating Component>

[0042] The first rotating component 41 rotates integrally with the friction plate 33 of the torque limiter 3 (described later). The first rotating component 41 has a first plate 41a and a second plate 41b. Both the first plate 41a and the second plate 41b are annular components with a central hole. The first plate 41a and the second plate 41b rotate integrally with each other. Furthermore, the first plate 41a and the second plate 41b cannot move relative to each other in the axial direction.

[0043] The first plate 41a and the second plate 41b are spaced apart from each other in the axial direction. The second plate 41b is disposed on the second side in the axial direction relative to the first plate 41a.

[0044] The first plate 41a and the second plate 41b each have a plurality of windows 411a and 411b. It should be noted that in this embodiment, the first plate 41a and the second plate 41b each have four windows 411a and 411b, but their number is not limited to this.

[0045] The windows 411a and 411b are spaced apart from each other in the circumferential direction. Each window 411a and 411b constitutes a retractable elastic component 43.

[0046] The outer peripheral surface 412 of the first rotating component 41 abuts against the inner peripheral surface of the cylindrical portion 312, which will be described later. It should be noted that the outer peripheral surface 412 of the first rotating component 41 is formed by the outer peripheral surface of at least one of the first plate 41a and the second plate 41b. The outer peripheral surface 412 of the first rotating component 41 has a plurality of abutting portions 412a and a plurality of non-abutting portions 412b. Furthermore, in this embodiment, the outer peripheral surface 412 of the first rotating component 41 has four abutting portions 412a and four non-abutting portions 412b.

[0047] The contact portion 412a extends in an arc shape when viewed axially. The contact portion 412a abuts against the inner circumferential surface of the cylindrical portion 312. The non-contact portion 412b extends in a straight line when viewed axially. The non-contact portion 412b does not abut against the inner circumferential surface of the cylindrical portion 312.

[0048] The outer periphery of the first rotating component 41 is disposed radially outward relative to the outer periphery of the friction plate 33. The outer periphery of the first rotating component 41 overlaps with the fastening component 37 (described later) when viewed axially. Furthermore, the outer periphery of the first rotating component 41 overlaps with the inertial component 36 (described later) when viewed axially. The outer periphery of the first rotating component 41 is disposed on a first side relative to the torque limiter 3 in the axial direction.

[0049] <Second Rotating Component>

[0050] The second rotating member 42 is configured to transmit torque from the first rotating member 41 to the output-side member. The second rotating member 42 is axially disposed between the first plate 41a and the second plate 41b. The second rotating member 42 is configured to be able to rotate relative to the first plate 41a and the second plate 41b.

[0051] The second rotating component 42 has a hub 421 and a flange plate 422. The hub 421 and the flange plate 422 are constructed as different components, but they can also be formed as a single component.

[0052] The hub 421 is cylindrical and extends axially. The hub 421 is disposed within the central holes of the first plate 41a and the second plate 41b. An axially extending spline hole is formed on the inner circumference of the hub 421. The input shaft of the output-side component can be splined into this spline hole.

[0053] Flange 422 extends radially from the outer peripheral surface of hub 421. Flange 422 is formed in an annular shape. Flange 422 is configured to rotate relative to the first plate 41a and the second plate 41b. Flange 422 is axially disposed between the first plate 41a and the second plate 41b.

[0054] The flange plate 422 has a plurality of receiving holes 423. It should be noted that in this embodiment, the flange plate 422 has four receiving holes 423, but this number is not limited to this. The receiving holes 423 are spaced apart from each other in the circumferential direction. Each receiving hole 423 is configured to receive an elastic member 43. When viewed axially, each receiving hole 423 is positioned to overlap with each of the windows 411a, 411b.

[0055] <Elastic Components>

[0056] The elastic member 43 is configured to elastically connect the first rotating member 41 and the second rotating member 42 in the rotational direction. The elastic member 43 is, for example, a helical spring.

[0057] The elastic member 43 is housed in the receiving hole 423 of the second rotating member 42. In addition, the elastic member 43 is housed in the window portion 411a of the first plate 41a and also in the window portion 411b of the second plate 41b.

[0058] [Torque Limiter]

[0059] The torque limiter 3 is configured to rotate about the rotation axis O. The torque limiter 3 is positioned on the first axial side relative to the drive plate 110. The torque limiter 3 is annular. The torque limiter 3 is configured to be mounted on the drive plate 110.

[0060] The torque limiter 3 is configured to limit the torque transmitted between the drive plate 110 and the damping unit 4. That is, the torque limiter 3 is configured to limit the transmission of torque exceeding a predetermined value in the power transmission device 100.

[0061] The torque limiter 3 has a first side plate 31, a second side plate 32, a friction plate 33, a pressure plate 34, a force-applying component 35, and an inertial component 36.

[0062] <First Side Panel>

[0063] A first side plate 31 is disposed on a first side in the axial direction relative to the drive plate 110. The first side plate 31 is mounted on the drive plate 110. Specifically, the first side plate 31 has a plurality of through holes 310. The through holes 310 are spaced apart in the circumferential direction. The through holes 310 open to a second side in the axial direction. Each through hole 310 is configured to communicate with a corresponding through hole 110a of the drive plate 110.

[0064] Multiple bolts 112 fasten the drive plate 110, the first side plate 31, and the inertial component 36. The bolts 112 pass through the through hole 110a in the drive plate 110 and the through hole 310 in the first side plate 31. The first side plate 31 rotates integrally with the drive plate 110. The first side plate 31 is annular. The thickness of the first side plate 31 is greater than that of the drive plate 110.

[0065] Figure 3 This is an enlarged sectional view of the power transmission device 100. (For example...) Figure 3 As shown, the first side plate 31 has an annular portion 311 and a cylindrical portion 312. The annular portion 311 and the cylindrical portion 312 are integrally formed from a single component.

[0066] The annular portion 311 is annular, extending circumferentially. The annular portion 311 has a first bulge 311a, a first inner circumferential portion 311b, and a first outer circumferential portion 311c. The first bulge 311a bulges axially. The first bulge 311a bulges in the same direction as the cylindrical portion 312. That is, the first bulge 311a bulges axially to a first side. Compared to the other portions of the annular portion 311, the first bulge 311a bulges axially to a first side. The first bulge 311a extends circumferentially.

[0067] The first inner peripheral portion 311b is disposed radially inward relative to the first bulge portion 311a. The first inner peripheral portion 311b is in contact with the friction plate 33.

[0068] The first outer peripheral portion 311c is disposed radially outward relative to the first bulge 311a. The first outer peripheral portion 311c abuts against the inertial member 36. Furthermore, the first outer peripheral portion 311c abuts against the drive plate 110. That is, the first outer peripheral portion 311c is held between the drive plate 110 and the inertial member 36.

[0069] The cylindrical portion 312 extends axially from the outer peripheral end of the annular portion 311. More specifically, the cylindrical portion 312 extends axially from a first side of the outer peripheral end of the annular portion 311. That is, the cylindrical portion 312 extends axially from the outer peripheral end of the annular portion 311 away from the drive plate 110. Furthermore, the cylindrical portion 312 can be formed by bending the outer peripheral portion of the first side plate 31 axially. The first side plate 31 can be formed by sheet metal processing or stamping.

[0070] <Second Side Panel>

[0071] The second side plate 32 is disposed on the first side of the axial direction relative to the first side plate 31. A friction plate 33, a pressure plate 34, and a force-applying component 35 are disposed between the first side plate 31 and the second side plate 32 in the axial direction. The thickness of the second side plate 32 is thinner than that of the first side plate 31.

[0072] The second side plate 32 is configured to rotate integrally with the first side plate 31. The second side plate 32 is fastened to the first side plate 31 by a plurality of fastening members 37. The fastening members 37 are spaced apart in the circumferential direction. The fastening members 37 are, for example, rivets.

[0073] The second side plate 32 has a second bulge 321, a second inner peripheral portion 322, and a second outer peripheral portion 323. The second bulge 321 bulges axially. The second bulge 321 bulges in the opposite direction to the first bulge 311a. That is, the second bulge 321 bulges towards a second side axially. That is, the second bulge 321 bulges toward the first bulge 311a.

[0074] The second bulge 321 extends circumferentially. The second bulge 321 abuts against the first bulge 311a in the axial direction. The fastening member 37 fastens the first bulge 311a and the second bulge 321.

[0075] The second inner circumferential portion 322 is disposed radially inward relative to the second bulge portion 321. The second inner circumferential portion 322 supports the force-applying member 35. The second inner circumferential portion 322 is axially spaced from the first inner circumferential portion 311b. A friction plate 33, a pressure plate 34, and the force-applying member 35 are disposed axially between the first inner circumferential portion 311b and the second inner circumferential portion 322.

[0076] The second outer peripheral portion 323 is disposed radially outward relative to the second bulge 321. The second outer peripheral portion 323 is axially spaced from the first outer peripheral portion 311c. An inertial member 36 is disposed between the first outer peripheral portion 311c and the second outer peripheral portion 323 in the axial direction. The second outer peripheral portion 323 abuts against the inertial member 36.

[0077] The outer peripheral surface 324 of the second side plate 32 abuts against the inner peripheral surface of the cylindrical portion 312. For example... Figure 1 As shown, the outer peripheral surface 324 of the second side plate 32 has a plurality of abutting portions 324a and a plurality of non-abutting portions 324b. It should be noted that, in this embodiment, the outer peripheral surface 324 of the second side plate 32 has four abutting portions 324a and four non-abutting portions 324b.

[0078] The abutting portion 324a extends in an arc shape when viewed axially. The abutting portion 324a abuts against the inner circumferential surface of the cylindrical portion 312. The non-abutting portion 324b extends in a straight line when viewed axially. The non-abutting portion 324b does not abut against the inner circumferential surface of the cylindrical portion 312.

[0079] <Friction Plate>

[0080] like Figure 2 as well as Figure 3 As shown, the friction plate 33 is an annular plate extending circumferentially. The friction plate 33 is configured to rotate about the rotation axis O. The friction plate 33 is configured to rotate relative to the first side plate 31.

[0081] The friction plate 33 abuts against the first side plate 31 in the axial direction. More specifically, the friction plate 33 abuts against the first inner peripheral portion 311b of the annular portion 311 in the axial direction. The friction plate 33 is configured to engage with the first side plate 31 through friction.

[0082] Friction plate 33 is mounted on the first rotating component 41. More specifically, friction plate 33 is mounted on the second plate 41b. For example, friction plate 33 is mounted on the second plate 41b by fastening component 113. Friction plate 33 rotates integrally with the first rotating component 41. It should be noted that friction plate 33 and second plate 41b are different components, but friction plate 33 can also be integrally formed with second plate 41b as a single component.

[0083] The friction plate 33 has a main body 331, a first friction member 332, and a second friction member 333. The main body 331 is annular, extending circumferentially. The first friction member 332 is mounted on a first axial side of the main body 331. The second friction member 333 is mounted on a second axial side of the main body 331. The first friction member 332 and the second friction member 333 rotate integrally with the main body 331. The first friction member 332 and the second friction member 333 are annular. The first friction member 332 and the second friction member 333 are mounted on the outer periphery of the main body 331.

[0084] <Pressure plate>

[0085] The pressure plate 34 is annular. The pressure plate 34 is axially positioned between the force-applying component 35 and the friction plate 33. The pressure plate 34 cooperates with the first side plate 31 to clamp the friction plate 33. The first side plate 31 and the pressure plate 34 abut against the first friction member 332 and the second friction member 333.

[0086] The pressure plate 34 is configured to rotate integrally with the first side plate 31. Furthermore, the pressure plate 34 is axially movable relative to the first side plate 31. Specifically, the pressure plate 34 has a plurality of protrusions 341 projecting radially outward (see reference). Figure 2 The protrusion 341 engages with the engagement hole 313 formed on the first side plate 31, so that the pressure plate 34 can rotate integrally with the first side plate 31 in a state in which it can move axially relative to the first side plate 31.

[0087] <Force-applying component>

[0088] The force-applying member 35 is axially disposed between the second side plate 32 and the pressure plate 34. The force-applying member 35 applies force to the pressure plate 34 towards the second axial side. That is, the force-applying member 35 applies force to the pressure plate 34 towards the first side plate 31. As a result, the friction plate 33 is clamped between the pressure plate 34 and the first side plate 31. The force-applying member 35 is an annular shape extending circumferentially. The force-applying member 35 is, for example, a coil spring. The force-applying member 35 abuts against the second inner circumferential portion 322 at its outer circumferential end and against the pressure plate 34 at its inner circumferential end.

[0089] <Inertial Components>

[0090] The inertial component 36 is annular, extending circumferentially. The thickness of the inertial component 36 is greater than that of the first side plate 31. It should be noted that the thickness of the inertial component 36 refers to its axial dimension. The inertial component 36 is disposed on a first axial side relative to the first side plate 31. The inertial component 36 has a plurality of threaded holes 361. The threaded holes 361 open towards a second axial side. It should be noted that in this embodiment, since the threaded holes 361 axially penetrate the inertial component 36, they also open towards the first axial side. Each threaded hole 361 communicates with a corresponding through hole 310. A bolt 112 is threadedly engaged with the threaded hole 361 of the inertial component 36. Thus, the torque limiter 3 is mounted on the drive plate 110.

[0091] The inertial component 36 is configured to rotate integrally with the first side plate 31. Specifically, the inertial component 36 is mounted to the first side plate 31 by a plurality of pins 38. In addition, the inertial component 36 is also mounted to the first side plate 31 by a plurality of bolts 112.

[0092] The inertial component 36 overlaps with the cylindrical portion 312 when viewed radially. Specifically, the outer peripheral surface of the inertial component 36 faces the inner peripheral surface of the cylindrical portion 312. The inertial component 36 overlaps with the annular portion 311 when viewed axially. Specifically, the inertial component 36 overlaps with the first outer peripheral portion 311c when viewed axially. The inertial component 36 is opposite to the annular portion 311. It should be noted that other components may also be inserted between the inertial component 36 and the annular portion 311.

[0093] The inertial component 36 overlaps with the second side plate 32 when viewed axially. More specifically, the inertial component 36 overlaps with the second outer periphery 323 when viewed axially. The inertial component 36 and the second outer periphery 323 are opposite each other. It should be noted that other components may also be installed between the inertial component 36 and the second outer periphery 323.

[0094] The inertial component 36 is held axially by the annular portion 311 of the first side plate 31 and the second side plate 32. More specifically, the inertial component 36 is held axially by the first outer peripheral portion 311c and the second outer peripheral portion 323.

[0095] The inertial member 36 is disposed radially outward relative to the first bulge 311a. The inertial member 36 is also disposed radially outward relative to the second bulge 321. The inertial member 36 is radially disposed between the cylindrical portion 312 and the first bulge 311a. Furthermore, the inertial member 36 is radially disposed between the cylindrical portion 312 and the second bulge 321. Thus, the inertial member 36 is disposed within the space defined by the cylindrical portion 312, the first outer peripheral portion 311c, the first bulge 311a, the second outer peripheral portion 323, and the second bulge 321.

[0096] [Variation Example]

[0097] The embodiments of the present invention have been described above, but the present invention is not limited thereto. Various modifications can be made as long as they do not depart from the spirit of the present invention. In addition, the following variations can be applied simultaneously.

[0098] (a) The inertial component 36 may also not be ring-shaped. For example, such as Figure 4 as well as Figure 5 As shown, the inertial component 36 can also be composed of multiple nuts. The nuts 36 are spaced apart circumferentially. Each nut 36 is thicker than the first side plate 31. It should be noted that... Figure 4 This is the front view of the power transmission device in this modified example. Figure 5 yes Figure 4 VV-line sectional view.

[0099] (b) such as Figure 6 As shown, the cylindrical portion 312 may also extend axially to a second side from the outer peripheral end of the annular portion 311. That is, the cylindrical portion 312 may also extend axially toward the drive plate 110 from the outer peripheral end of the annular portion 311. In this case, the first bulge 311a bulges axially to a second side. That is, the first bulge 311a bulges in the same direction as the direction in which the cylindrical portion 312 extends.

[0100] The inertial component 36 can be configured on a second side in the axial direction relative to the first side plate 31. The inertial component 36 is clamped by the drive plate 110 and the first side plate 31. In this case, the inertial component 36 is fixed to the first side plate 31 by bolts 114. It should be noted that bolts 112 fasten the drive plate 110 and the inertial component 36.

[0101] (c) In the above embodiment, the torque limiter 3 has an inertial component 36, but the torque limiter 3 may also not have an inertial component 36.

[0102] (d) In the above embodiment, the inertial component 36 and the drive plate 110 are composed of different components, but the structure of the inertial component 36 is not limited thereto. For example, as Figure 7As shown, the inertial component 36 can also be integrally formed with the drive plate 110. In addition, the second side plate 32 can also be disposed on the second side in the axial direction relative to the first side plate 31.

Claims

1. A torque limiter, comprising: The first side plate has an annular portion and a cylindrical portion, the annular portion extending circumferentially, and the cylindrical portion extending axially from the outer peripheral end of the annular portion; The friction plate is configured to rotate relative to the first side plate; A pressure plate, which cooperates with the first side plate to clamp the friction plate; and The force-applying component applies force to the pressure plate axially toward the first side plate.

2. The torque limiter according to claim 1, wherein, The torque limiter also includes an inertial component configured to overlap with the cylindrical portion when viewed radially and with the annular portion when viewed axially.

3. The torque limiter according to claim 2, wherein, The inertial component has a threaded hole extending axially.

4. The torque limiter according to claim 2, wherein, The inertial component is a ring extending circumferentially. The thickness of the inertial component is greater than that of the first side plate.

5. The torque limiter according to claim 2, wherein, The inertial component is a nut that is thicker than the plate of the first side plate.

6. The torque limiter according to claim 2, wherein, The annular portion has a bulge that protrudes in the same direction as the cylindrical portion. The inertial component is radially disposed between the cylindrical portion and the bulge portion.

7. The torque limiter according to claim 1, wherein, The torque limiter also has a second side plate. The friction plate, the pressure plate, and the force-applying component are axially disposed between the first side plate and the second side plate.

8. A power transmission device, comprising: The torque limiter according to any one of claims 1 to 7; and The vibration damping unit has a first rotating component, a second rotating component, and an elastic component. The first rotating component is configured to rotate integrally with the friction plate, the second rotating component is configured to rotate relative to the first rotating component, and the elastic component elastically connects the first rotating component and the second rotating component.

9. The power transmission device according to claim 8, wherein, The first rotating component has an outer peripheral surface that abuts against the inner peripheral surface of the cylindrical portion.

10. The power transmission device according to claim 9, wherein, The outer peripheral surface of the first rotating component has: The abutting portion, when viewed axially, extends in an arc shape and abuts against the inner circumferential surface of the cylindrical portion; and The non-abutting portion extends in a straight line when viewed axially and does not abut against the inner circumferential surface of the cylindrical portion.

11. The power transmission device according to claim 8, wherein, The power transmission device also includes a drive plate configured to receive torque from the prime mover. The first side plate is configured to rotate integrally with the drive plate.

12. The power transmission device according to claim 11, wherein, The cylindrical portion extends axially from the outer peripheral end of the annular portion away from the drive plate.

13. The power transmission device according to claim 11, wherein, The cylindrical portion extends axially from the outer peripheral end of the annular portion toward the drive plate.

Images