Damper device

Abstract

To suppress the flow of rust water to a friction material.SOLUTION: A damper device 100 includes a damper unit 2 and a torque limiter unit 5. The damper unit 2 has a first input plate 21, a second input plate 22, a fastening part 26, an output part 23, and an elastic member 24. The torque limiter unit 5 has a first side plate 51, a second side plate 52, a friction plate 56, and a first friction material 55a. An outer peripheral end of the first input plate 21 is arranged in a first side in an axial direction with respect to an inner peripheral end of the first side plate 51. An outside diameter of the first input plate 21 is larger than an inside diameter of the first side plate 51. The fastening part 26 is disposed in the first side in the axial direction with respect to the first side plate 51.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a damper device. [Background technology]

[0002] For example, in a hybrid vehicle equipped with an engine and an electric motor, a damper device having a torque limiter function such as that shown in Patent Document 1 is used to prevent excessive torque from being transmitted from the output side to the engine side when starting the engine, etc.

[0003] The damper device of Patent Document 1 includes a damper unit and a torque limiter unit disposed radially outward of the damper unit. The torque limiter unit includes a friction disc with friction material fixed to both sides. The torque limiter unit also sandwiches the friction disc between a cover plate and a pressure plate. When excessive torque exceeding a predetermined value is input, slippage occurs between the friction disc and the cover plate and pressure plate, preventing the excessive torque from being transmitted. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-226572 Summary of the Invention [Problem to be solved by the invention]

[0005] In a damper device configured as described above, water adheres to the components that make up the damper unit, generating rusty water. If this rusty water is transferred to the friction material, the friction disc, cover plate, and pressure plate may become stuck together, causing the torque limiter unit to not operate as designed.

[0006] An object of the present invention is to provide a damper device that can prevent rust water from being transmitted to a friction material. [Means for solving the problem]

[0007] A damper device according to one aspect of the present invention is configured to be attached to a power source-side member on a first axial side. The damper device includes a damper unit and a torque limiter unit. The torque limiter unit is configured to be attached to a power source-side member. The damper unit has a first input plate, a second input plate, a fastening portion, an output portion, and an elastic member. The second input plate is disposed on a second axial side of the first input plate. The second input plate rotates integrally with the first input plate. The fastening portion fastens the first input plate to the second input plate. The elastic member elastically connects the output plate to the first and second input plates. The torque limiter unit has an annular first side plate, an annular second side plate, a friction plate, and a first friction material. The second side plate is disposed on a second axial side of the first side plate. The second side plate is disposed axially spaced from the first side plate. The friction plate rotates integrally with the first and second input plates. The first friction material is disposed between the friction plate and the first side plate. The outer peripheral end of the first input plate is disposed on a first axial side relative to the inner peripheral end of the first side plate. The outer diameter of the first input plate is larger than the inner diameter of the first side plate. The fastening portion is disposed on the first axial side relative to the first side plate.

[0008] In the damper device, water tends to adhere to the side opposite the power source-side component, i.e., the first axial side, and rusty water tends to form. That is, rusty water tends to form on the first side surface (the surface facing the first axial side) of the first input plate. Therefore, in the damper device of the present invention, the outer peripheral end of the first input plate is positioned on the first axial side relative to the inner peripheral end of the first side plate, and the outer diameter of the first input plate is larger than the inner diameter of the first side plate. Therefore, rusty water formed on the first side surface of the first input plate does not flow into the space between the first side plate and the second side plate. As a result, it is possible to prevent rusty water from flowing to the first friction material.

[0009] Preferably, the fastening portion is arranged so as to overlap with the first side plate when viewed in the axial direction.

[0010] Preferably, the output plate is arranged on the first side in the axial direction relative to the first side plate.

[0011] Preferably, the friction plate is arranged on the second axial side relative to the second input plate.

[0012] Preferably, the first input plate has a first plate body and a first mounting portion. The first mounting portion protrudes radially outward from the first plate body. The fastening portion fastens the first mounting portion to the second input plate.

[0013] Preferably, the second input plate has a second plate body, an extension portion, and a second mounting portion. The extension portion extends from the second plate body to a first side in the axial direction. The second mounting portion extends radially outward from the extension portion. The fastening portion fastens the first mounting portion to the second mounting portion. [Effects of the Invention]

[0014] According to the present invention, it is possible to suppress the transmission of rust water to the friction material. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. [Figure 2] Cross-sectional view of line II-II in Figure 1. [Figure 3] FIG. [Figure 4] Front view of the hub flange. [Figure 5] FIG. 10 is a front view of a second input plate according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0016] [Overall configuration] Fig. 1 is a front view of the damper device 100 according to this embodiment, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. In Fig. 2, line OO is the rotation axis of the damper device 100. In Fig. 2, an engine (an example of a power source) is disposed on the left side of the damper device 100, and a drive unit including an electric motor, a transmission, etc. is disposed on the right side.

[0017] In the following description, the axial direction refers to the direction in which the rotation axis O of the damper device 100 extends. The first axial side refers to the right side in FIG. 2, and the second axial side refers to the left side in FIG. 2. In other words, the first axial side refers to the output side, and the second axial side refers to the input side. The circumferential direction refers to the circumferential direction of a circle centered on the rotation axis O, and the radial direction refers to the radial direction of the circle centered on the rotation axis O. The circumferential direction does not need to completely coincide with the circumferential direction of the circle centered on the rotation axis O, and the radial direction does not need to completely coincide with the radial direction of the circle centered on the rotation axis O.

[0018] As shown in FIGS. 1 and 2, the damper device 100 is provided between a flywheel 110 (an example of a power source-side component) and an input shaft 111 of a drive unit. The damper device 100 is disposed on a first axial side of the flywheel 110. The damper device 100 is attached to the flywheel 110. That is, a second axial side surface of the damper device 100 is covered by the flywheel 110. The damper device 100 is configured to limit torque transmitted between the engine and the drive unit and to damp rotation fluctuations. The damper device 100 includes a damper unit 2 and a torque limiter unit 5.

[0019] [Torque limiter unit 5] The torque limiter unit 5 is configured to be attached to the flywheel 110. The torque limiter unit 5 is disposed radially outward from the damper unit 2. The torque limiter unit 5 is configured to limit the torque transmitted between the flywheel 110 and the damper unit 2.

[0020] The torque limiter unit 5 includes a first side plate 51, a second side plate 52, a pressure plate 53, a cone spring 54, a first friction material 55a, a second friction material 55b, and a friction plate 56.

[0021] <First side plate> The first side plate 51 is annular. The first side plate 51 is attached to the flywheel 110. That is, torque is transmitted to the first side plate 51 from the flywheel 110. The first side plate 51 has an outer circumferential portion 511 and an inner circumferential portion 512.

[0022] The outer peripheral portion 511 is attached to the flywheel 110. The inner peripheral portion 512 is disposed on a first axial side relative to the outer peripheral portion 511. The first side plate 51 receives a biasing force from the cone spring 54 at the inner peripheral portion 512.

[0023] <Second side plate> The second side plate 52 is annular. The second side plate 52 is disposed on a second axial side relative to the first side plate 51. The second side plate 52 is fixed to the first side plate 51 by rivets (not shown) or the like. Therefore, the second side plate 52 rotates integrally with the first side plate 51.

[0024] The second side plate 52 is disposed axially apart from the first side plate 51. Specifically, the second side plate 52 has an outer circumferential portion 521 and an inner circumferential portion 522. The inner circumferential portion 522 of the second side plate 52 is disposed axially apart from the inner circumferential portion 512 of the first side plate 51. The outer circumferential portion 521 of the second side plate 52 is in contact with the outer circumferential portion 511 of the first side plate 51.

[0025] The outer diameter of the second side plate 52 is smaller than the outer diameter of the first side plate 51. The outer diameter of the second side plate 52 may be the same as or larger than the outer diameter of the first side plate 51. The inner diameter of the second side plate 52 is larger than the inner diameter of the first side plate 51. The plate thickness of the second side plate 52 is thinner than the plate thickness of the first side plate 51.

[0026] <Friction plate> The friction plate 56 is annular. The friction plate 56 is configured to rotate integrally with the first and second input plates 21, 22. Specifically, the friction plate 56 is attached to the outer peripheral end of the second input plate 22 with a rivet 101 or the like. The friction plate 56 is disposed on a second axial side relative to the second input plate 22. The friction plate 56 is thinner than the second input plate 22. The friction plate 56 is disposed between the first side plate 51 and the second side plate 52 in the axial direction.

[0027] <Friction material> The first and second friction materials 55a, 55b are annular. The first friction material 55a is disposed axially between the friction plate 56 and the first side plate 51. The second friction material 55b is disposed axially between the friction plate 56 and the second side plate 52. Specifically, the second friction material 55b is disposed axially between the friction plate 56 and the pressure plate 53.

[0028] The first and second friction materials 55a, 55b are attached to a friction plate 56. The first friction material 55a is in frictional engagement with the first side plate 51. The second friction material 55b is in frictional engagement with the pressure plate 53. When a torque equal to or greater than a predetermined value is input, the first friction material 55a slides against the first side plate 51, and the second friction material 55b slides against the pressure plate 53. As a result, the first side plate 51 and the friction plate 56 rotate relative to each other. The first friction material 55a may be fixed to the first side plate 51 and in frictional engagement with the friction plate 56. The second friction material 55b may be fixed to the pressure plate 53 and in frictional engagement with the friction plate 56.

[0029] <Pressure plate> The pressure plate 53 is annular and is disposed axially between the first side plate 51 and the second side plate 52. More specifically, the pressure plate 53 is disposed axially between the second friction material 55b and the cone spring 54.

[0030] <Cone spring> The cone spring 54 is disposed axially between the second side plate 52 and the pressure plate 53. The cone spring 54 urges the pressure plate 53 toward the first side in the axial direction. As a result, the pressure plate 53 and the first side plate 51 sandwich the friction plate 56 and the first and second friction materials 55a, 55b.

[0031] [Damper unit 2] The damper unit 2 has a first input plate 21, a second input plate 22, a hub flange 23, a plurality of elastic members 24, and a plurality of fastening portions 26. The damper unit 2 also has a hysteresis generating mechanism 25. The damper unit 2 is configured to damp rotation fluctuations.

[0032] <First and second input plates> The first input plate 21 and the second input plate 22 are both annular members having a center hole. The first input plate 21 has a larger outer diameter than the second input plate 22.

[0033] The first input plate 21 and the second input plate 22 are arranged at an interval from each other in the axial direction. The second input plate 22 is arranged on a second side in the axial direction relative to the first input plate 21. The first input plate 21 and the second input plate 22 rotate integrally with each other. Furthermore, the first input plate 21 and the second input plate 22 are immovable relative to each other in the axial direction.

[0034] The first input plate 21 has a plurality of first window portions 211. In this embodiment, the first input plate 21 has four first window portions 211. The first window portions 211 are arranged at intervals in the circumferential direction.

[0035] The second input plate 22 has a plurality of second window portions 221. In this embodiment, the second input plate 22 has four second window portions 221. The second window portions 221 are arranged at intervals in the circumferential direction. Each second window portion 221 is disposed at a position overlapping with a corresponding first window portion 211 when viewed in the axial direction.

[0036] The first input plate 21 has a first plate main body 212 and a plurality of first mounting portions 213. In this embodiment, the first input plate 21 has four first mounting portions 213.

[0037] The first plate main body 212 is annular. The first mounting portions 213 protrude radially outward from the outer circumferential surface of the first plate main body 212. The first mounting portions 213 are arranged at intervals in the circumferential direction.

[0038] The outer peripheral end of the first input plate 21 is disposed on a first axial side relative to the inner peripheral end of the first side plate 51. When viewed in the axial direction, the outer peripheral end of the first input plate 21 overlaps with the inner peripheral end of the first side plate 51. Note that the outer peripheral end of the first input plate 21 refers to the outer peripheral end of the first plate main body 212.

[0039] The outer diameter of the first input plate 21 is larger than the inner diameter of the first side plate 51. Therefore, when viewed from the first axial side, the inner peripheral edge of the first side plate 51 is covered by the first input plate 21 and is not visible. Note that the outer diameter of the first input plate 21 means the outer diameter of the first plate main body 212.

[0040] 2 and 3, the second input plate 22 has a second plate main body 222, a plurality of extending portions 223, and a plurality of second mounting portions 224. In this embodiment, the second input plate 22 has four extending portions 223 and four second mounting portions 224.

[0041] The second plate body 222 is annular. The extension portions 223 extend from the outer periphery of the second plate body 222 to the first side in the axial direction. The extension portions 223 are arranged at intervals in the circumferential direction.

[0042] The second mounting portions 224 extend radially outward from the extending portion 223. Specifically, the second mounting portions 224 extend radially outward from the first axial side end portion of the extending portion 223. The second mounting portions 224 are arranged at intervals in the circumferential direction.

[0043] The outer diameter of the second input plate 22 is smaller than the inner diameter of the first side plate 51. The outer diameter of the second input plate 22 is also smaller than the outer diameter of the first input plate 21. The outer diameter of the second input plate 22 refers to the outer diameter of the second plate main body 222.

[0044] <Fastening part> The fastening portion 26 fastens the first input plate 21 and the second input plate 22. In detail, the fastening portion 26 fastens the first mounting portion 213 of the first input plate 21 and the second mounting portion 224 of the second input plate 22. The fastening portion 26 is, for example, a rivet.

[0045] The fastening portion 26 is disposed on a first axial side with respect to the first side plate 51. In addition, the fastening portion 26 is disposed so as to overlap with the first side plate 51 when viewed in the axial direction.

[0046] <Hub flange 23> 2 and 4, the hub flange 23 is configured to transmit torque from the first and second input plates 21, 22 to an output device. The hub flange 23 has a hub portion 231, a flange portion 232 (an example of an output plate), and a plurality of housing holes 233. The hub portion 231 and the flange portion 232 are integrally configured as a single member, but may also be configured as separate members.

[0047] The hub portion 231 is cylindrical and is disposed within the central holes of the first input plate 21 and the second input plate 22. A spline hole extending in the axial direction is formed in the inner periphery of the hub portion 231. The input shaft 111, which is an output-side member, can be spline-engaged with this spline hole.

[0048] The flange portion 232 extends radially from the outer peripheral surface of the hub portion 231. The flange portion 232 is formed in an annular shape. The flange portion 232 is disposed between the first input plate 21 and the second input plate 22 in the axial direction. The flange portion 232 is disposed on a first axial side with respect to the first side plate 51.

[0049] The accommodating holes 233 are formed in the flange portion 232. In this embodiment, there are four accommodating holes 233. The accommodating holes 233 are arranged in the circumferential direction. When viewed in the axial direction, each accommodating hole 233 is disposed at a position overlapping with each first window portion 211 and each second window portion 221.

[0050] The hub flange 23 has multiple stopper portions 234. In this embodiment, the hub flange 23 has four stopper portions 234. The stopper portions 234 protrude radially outward from the outer peripheral surface of the flange portion 232. The extension portion 223 of the second input plate 22 abuts against these stopper portions 234, thereby restricting relative rotation of the first and second input plates 21, 22 with respect to the hub flange 23.

[0051] <Elastic material> 1 and 2, the elastic member 24 is configured to elastically connect the first and second input plates 21, 22 and the flange portion 232 in the rotational direction. The elastic member 24 is, for example, a coil spring.

[0052] The elastic member 24 is housed in the housing hole 233 of the flange portion 232. The elastic member 24 is housed in the first window portion 211 of the first input plate 21, and also in the second window portion 221 of the second input plate 22.

[0053] <Hiss generation mechanism> The hysteresis generating mechanism 25 is configured to generate hysteresis torque when the first and second input plates 21, 22 and the hub flange 23 rotate relative to each other.

[0054] [Operation] Torque transmitted from the engine to the flywheel 110 is input to the damper unit 2 via the torque limiter unit 5. In the damper unit 2, the torque is input to the first and second input plates 21, 22, and this torque is transmitted to the hub flange 23 via the elastic member 24. Power is then transmitted from the hub flange 23 via the input shaft 111 to the electric motor, generator, transmission, etc. on the output side.

[0055] Furthermore, for example, when starting the engine, excessive torque may be transmitted from the output side to the engine. In such a case, the torque limiter unit 5 limits the torque transmitted to the engine side to a predetermined value or less.

[0056] [Variations] The present invention is not limited to the above-described embodiments, and various modifications and alterations are possible without departing from the scope of the present invention. In addition, the following modifications can also be applied at the same time.

[0057] (a) In the above embodiment, the first input plate 21 has the first mounting portion 213, but the first input plate 21 does not have to have the first mounting portion 213. In this case, the fastening portion 26 fastens the second mounting portion 224 of the second input plate 22 and the first plate main body 212 of the first input plate 21.

[0058] (b) In the above embodiment, the second input plate 22 has a plurality of extending portions 223 and a plurality of second mounting portions 224. However, the second input plate 22 does not necessarily have to have the extending portions 223 and the second mounting portions 224. In this case, as shown in FIG. 5 , the second input plate 22 may have a cylindrical portion 225 and a flange portion 226. The cylindrical portion 225 extends from the outer peripheral end of the second plate main body 222 toward the first axial side. The flange portion 226 extends radially outward from the first axial side end of the cylindrical portion 225.

[0059] In this modified example, the outer peripheral end of the second input plate 22 is disposed on a first axial side relative to the inner peripheral end of the first side plate 51. When viewed in the axial direction, the outer peripheral end of the second input plate 22 overlaps with the inner peripheral end of the first side plate 51. Note that the outer peripheral end of the second input plate 22 refers to the flange portion 226.

[0060] The outer diameter of the second input plate 22 is larger than the inner diameter of the first side plate 51. The outer diameter of the second input plate 22 is substantially the same as the outer diameter of the first input plate 21. Note that the outer diameter of the second input plate 22 in this modified example refers to the outer diameter of the flange portion 226.

[0061] (c) In the above embodiment, the friction plate 56 is configured as a separate member from the second input plate 22, but it may be configured as a single member together with the second input plate 22. [Explanation of symbols]

[0062] 2: Damper unit 21: First input plate 212: First plate body 213: First mounting part 22: Second input plate 222: Second plate body 223: Extension part 224: Second mounting part 23: Hub flange 24: Elastic member 26: Fastening part 5: Torque limiter unit 51: First side plate 52: Second side plate 55a: 1st friction material 56: Friction plate 100: Damper device

Claims

1. A damper device configured to be attached to a power source-side member on a first axial side, A damper unit; a torque limiter unit configured to be attached to a member on the power source side; Equipped with The damper unit is a first input plate; a second input plate disposed on a second axial side of the first input plate and rotating integrally with the first input plate; a fastening portion that fastens the first input plate and the second input plate; An output plate; an elastic member that elastically connects the output plate to the first and second input plates; and The torque limiter unit is an annular first side plate; an annular second side plate disposed on a second axial side of the first side plate and spaced apart from the first side plate in the axial direction; a friction plate that rotates integrally with the first and second input plates; a first friction material disposed between the friction plate and the first side plate; and an outer peripheral end of the first input plate is disposed on a first axial side relative to an inner peripheral end of the first side plate; an outer diameter of the first input plate is larger than an inner diameter of the first side plate; The fastening portion is disposed on a first axial side of the first side plate. Damper device.

2. The fastening portion is disposed so as to overlap with the first side plate when viewed in the axial direction. The damper device according to claim 1 .

3. the output plate is disposed on a first axial side with respect to the first side plate; The damper device according to claim 1 or 2.

4. the friction plate is disposed on a second axial side relative to the second input plate; The damper device according to any one of claims 1 to 3.

5. the first input plate has a first plate body and a first mounting portion protruding radially outward from the first plate body, the fastening portion fastens the first mounting portion and the second input plate together; The damper device according to any one of claims 1 to 4.

6. the second input plate has a second plate body, an extension portion extending from the second plate body toward a first side in the axial direction, and a second mounting portion extending radially outward from the extension portion, The fastening portion fastens the first mounting portion and the second mounting portion together. The damper device according to claim 5 .

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