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

[0006] , ,

[0005] ,

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

Background Art

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

[0003] The damper device of Patent Document 1 has a damper unit and a torque limiter unit disposed radially outside the damper unit. The torque limiter unit has a friction disk with friction materials fixed on both sides. Further, the torque limiter unit sandwiches the friction disk with a cover plate and a pressure plate. When excessive torque exceeding a predetermined value is input, slippage occurs between the friction disk and the cover plate and the pressure plate, and the excessive torque is configured not to be transmitted.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the damper device configured as described above, when water adheres to each member constituting the damper unit and rusty water is generated, and the rusty water is transmitted to the friction material, the friction disk, the cover plate, and the pressure plate may stick together, and the torque limiter unit may not operate as designed.

[0006] The object of the present invention is to provide a damper device that can suppress the transmission of rust water to the 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 the first axial side. The damper device comprises 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 comprises a first input plate, a second input plate, a fastening part, and an output plate 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 positioned on the second side in the axial direction relative to the first side plate. The second side plate is positioned at an axial distance from the first side plate. The friction plate rotates integrally with the first and second input plates. The first friction material is positioned between the friction plate and the first side plate. The outer peripheral end of the first input plate is positioned on the first side in the axial direction 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 part is positioned on the first side in the axial direction relative to the first side plate.

[0008] In damper devices, water tends to adhere and rust water is easily generated on the side opposite to the power source side, i.e., the first side in the axial direction. Specifically, rust water is easily generated on the first side surface of the first input plate (the surface facing the first side in the axial direction). Therefore, in the damper device of the present invention, the outer peripheral end of the first input plate is positioned on the first side in the axial direction 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. As a result, rust water generated on the first side surface of the first input plate does not spread into the space between the first side plate and the second side plate. As a result, it is possible to suppress the transmission of rust water to the first friction material.

[0009] Preferably, the fastening portion is positioned to overlap with the first side plate in an axial view.

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

[0011] Preferably, the friction plate is positioned on the second axial side with respect 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 extended portion, and a second mounting portion. The extended portion extends axially from the second plate body toward the first side. The second mounting portion extends radially outward from the extended portion. The fastening portion fastens the first mounting portion and 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 drawing]

[0015] [Figure 1] Front view of the damper device. [Figure 2] Cross-sectional view along line II-II in Figure 1. [Figure 3] Front view of the second input plate. [Figure 4] Front view of the hub flange. [Figure 5] Front view of the second input plate in a modified form. [Modes for carrying out the invention]

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

[0017] In the following explanation, "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 Figure 2, and the second axial side refers to the left side in Figure 2. That is, 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 the 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 perfectly coincide with the circumferential direction of the circle centered on the rotation axis O, and the radial direction does not need to perfectly coincide with the diametrical 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 the flywheel 110 (an example of a member on the power source side) and the input shaft 111 of the drive unit. The damper device 100 is arranged on the first side in the axial direction with respect to the flywheel 110. The damper device 100 is attached to the flywheel 110. That is, the surface on the second side in the axial direction of the damper device 100 is covered by the flywheel 110. And the damper device 100 is configured to limit the torque transmitted between the engine and the drive unit and to attenuate rotational fluctuations. The damper device 100 has 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 arranged radially outside with respect to 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 has 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 from the flywheel 110 to the first side plate 51. The first side plate 51 has an outer peripheral portion 511 and an inner peripheral portion 512.

[0022] The outer peripheral portion 511 is attached to the flywheel 110. The inner peripheral portion 512 is arranged on the first side in the axial direction with respect to the outer peripheral portion 511. The first side plate 51 receives the biasing force by the cone spring 54 at the inner peripheral portion 512.

[0023] <Second side plate> The second side plate 52 is annular in shape. The second side plate 52 is positioned on the 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. As a result, the second side plate 52 rotates integrally with the first side plate 51.

[0024] The second side plate 52 is positioned at an axial distance from the first side plate 51. More specifically, the second side plate 52 has an outer circumference 521 and an inner circumference 522. The inner circumference 522 of the second side plate 52 is positioned at an axial distance from the inner circumference 512 of the first side plate 51. The outer circumference 521 of the second side plate 52 is in contact with the outer circumference 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 thickness of the second side plate 52 is thinner than the 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 and 22. In detail, the friction plate 56 is attached to the outer peripheral end of the second input plate 22 by rivets 101 or the like. The friction plate 56 is positioned on the second axial side of the second input plate 22. The friction plate 56 is thinner than the second input plate 22. In the axial direction, the friction plate 56 is positioned between the first side plate 51 and the second side plate 52.

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

[0028] The first and second friction materials 55a and 55b are attached to the friction plate 56. The first friction material 55a frictionally engages with the first side plate 51. The second friction material 55b frictionally engages with the pressure plate 53. When a torque exceeding a predetermined value is applied, 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 frictionally engaged with the friction plate 56. The second friction material 55b may be fixed to the pressure plate 53 and frictionally engaged with the friction plate 56.

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

[0030] <Cornspring> The cone spring 54 is positioned axially between the second side plate 52 and the pressure plate 53. The cone spring 54 biases the pressure plate 53 axially toward the first side. As a result, the friction plate 56 and the first and second friction materials 55a and 55b are sandwiched between the pressure plate 53 and the first side plate 51.

[0031] [Damper Unit 2] The damper unit 2 includes 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 parts 26. The damper unit 2 also includes a hiss generation mechanism 25. The damper unit 2 is configured to dampen rotational fluctuations.

[0032] <First and Second Input Plates> The first input plate 21 and the second input plate 22 are both annular members having a central 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 spaced apart from each other in the axial direction. The second input plate 22 is positioned on the 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. Each first window portion 211 is arranged with spacing 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. Each second window portion 221 is arranged with spacing in the circumferential direction. Each second window portion 221 is positioned to overlap with each first window portion 211 in an axial view.

[0036] The first input plate 21 has a first plate 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 body 212 is annular in shape. The first mounting portion 213 protrudes radially outward from the outer circumferential surface of the first plate body 212. Each of the first mounting portions 213 is spaced apart in the circumferential direction.

[0038] The outer circumferential end of the first input plate 21 is positioned on the first axial side relative to the inner circumferential end of the first side plate 51. In an axial view, the outer circumferential end of the first input plate 21 overlaps with the inner circumferential end of the first side plate 51. Note that the outer circumferential end of the first input plate 21 refers to the outer circumferential end of the first plate 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 side in the axial direction, the inner periphery 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 refers to the outer diameter of the first plate body 212.

[0040] As shown in Figures 2 and 3, the second input plate 22 has a second plate body 222, a plurality of extensions 223, and a plurality of second mounting portions 224. In this embodiment, the second input plate 22 has four extensions 223 and four second mounting portions 224.

[0041] The second plate body 222 is annular. The extensions 223 extend from the outer circumference of the second plate body 222 toward the first axial direction. Each extension 223 is spaced apart in the circumferential direction.

[0042] The second mounting portion 224 extends radially outward from the extended portion 223. More specifically, the second mounting portion 224 extends radially outward from the first axial end of the extended portion 223. Each second mounting portion 224 is spaced apart 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. Furthermore, the outer diameter of the second input plate 22 is smaller than the outer diameter of the first input plate 21. Note that the outer diameter of the second input plate 22 refers to the outer diameter of the second plate body 222.

[0044] <Fastening section> The fastening portion 26 fastens the first input plate 21 and the second input plate 22. More specifically, 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 positioned on the first axial side of the first side plate 51. Furthermore, the fastening portion 26 is positioned so as to overlap with the first side plate 51 in an axial view.

[0046] <Hub flange 23> As shown in Figures 2 and 4, the hub flange 23 is configured to transmit torque from the first and second input plates 21 and 22 to the 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 formed from a single component, but they may be formed from separate components.

[0047] The hub portion 231 is cylindrical and is positioned within the central holes of the first input plate 21 and the second input plate 22. A splined hole extending in the axial direction is formed on the inner circumference of the hub portion 231. The input shaft 111, which is the output component, can be spline-engaged into this splined hole.

[0048] The flange portion 232 extends radially from the outer circumferential surface of the hub portion 231. The flange portion 232 is formed in an annular shape. In the axial direction, the flange portion 232 is positioned between the first input plate 21 and the second input plate 22. The flange portion 232 is positioned on the first axial side of 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. Each accommodating hole 233 is arranged in the circumferential direction. Each accommodating hole 233 is positioned to overlap with each first window portion 211 and each second window portion 221 in an axial view.

[0050] The hub flange 23 has a plurality of 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 circumferential surface of the flange portion 232. The extension portion 223 of the second input plate 22 abuts against these stopper portions 234, thereby restricting the relative rotation of the first and second input plates 21 and 22 with respect to the hub flange 23.

[0051] <Elastic material> As shown in Figures 1 and 2, the elastic member 24 is configured to elastically connect the first and second input plates 21 and 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 also housed in the first window portion 211 of the first input plate 21 and in the second window portion 221 of the second input plate 22.

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

[0054] [Operation] The 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, torque is input to the first and second input plates 21 and 22, and this torque is transmitted to the hub flange 23 via the elastic member 24. From the hub flange 23, power is transmitted via the input shaft 111 to the output side electric motor, generator, transmission, etc.

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

[0056] [Differentiation] The present invention is not limited to the embodiments described above, and various modifications or alterations are possible without departing from the scope of the invention. Furthermore, the following modifications can be applied simultaneously.

[0057] (a) In the above embodiment, the first input plate 21 had a first mounting portion 213, but the first input plate 21 does not have to have a 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 body 212 of the first input plate 21.

[0058] (b) In the above embodiment, the second input plate 22 had a plurality of extensions 223 and a plurality of second mounting portions 224, but the second input plate 22 does not have to have extensions 223 and second mounting portions 224. In this case, as shown in Figure 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 body 222 to 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 positioned on the first axial side relative to the inner peripheral end of the first side plate 51. In an axial view, the outer peripheral end of the second input plate 22 overlaps with the inner peripheral end of the first side plate 51. 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. Also, the outer diameter of the second input plate 22 is approximately the same as the outer diameter of the first input plate 21. In this modified example, the outer diameter of the second input plate 22 refers to the outer diameter of the flange portion 226.

[0061] (c) In the above embodiment, the friction plate 56 was made of a separate component from the second input plate 22, but it may be made of the same component as the second input plate 22. [Explanation of symbols]

[0062] 2: Damper Unit 21: First Input Plate 212: Main body of the first plate 213: First mounting section 22: Second input plate 222: Second plate body 223: Extension part 224: Second mounting section 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 the first axial side, Damper unit and A torque limiter unit configured to be attached to the power source side component, Equipped with, The damper unit is First input plate and A second input plate is positioned on the second axial side of the first input plate and rotates integrally with the first input plate, A fastening portion for fastening the first input plate and the second input plate, Output plate and, An elastic member that elastically connects the output plate and the first and second input plates, It has, The torque limiter unit is The annular first side plate, An annular second side plate is positioned on the second axial side of the first side plate and is 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 is disposed between the friction plate and the first side plate, It has, 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. The outer diameter of the first input plate is larger than the inner diameter of the first side plate. The fastening portion is positioned on the first axial side with respect to the first side plate, The fastening portion is arranged so as to overlap with the first side plate in an axial view. The outer peripheral end of the first input plate is positioned with an axial gap between it and the inner peripheral end of the first side plate. The gap between the outer peripheral end of the first input plate and the inner peripheral end of the first side plate connects the space where the first friction material is arranged with the space on the first axial side of the first input plate. Damper device.

2. The output plate is positioned on the first axial side with respect to the first side plate. The damper device according to claim 1.

3. The friction plate is positioned on the second axial side with respect to the second input plate. The damper device according to claim 1 or 2.

4. The first input plate comprises a first plate body and a first mounting portion that protrudes radially outward from the first plate body. The fastening portion fastens the first mounting portion and the second input plate. A damper device according to any one of claims 1 to 3.

5. The second input plate comprises a second plate body, an extended portion extending axially from the second plate body toward the first side, and a second mounting portion extending radially outward from the extended portion. The fastening portion fastens the first mounting portion and the second mounting portion. The damper device according to claim 4.

6. The outer edge of the first plate body is positioned radially inward with respect to the outer edge of the first mounting portion. The damper device according to claim 4 or 5.

7. The outer diameter of the first input plate is smaller than the outer diameter of the friction plate. A damper device according to any one of claims 1 to 6.

8. The outer diameter of the first input plate is smaller than the outer diameter of the first friction material. A damper device according to any one of claims 1 to 7.

9. The first side plate has an outer circumference and an inner circumference that is positioned on the first axial side with respect to the outer circumference. A damper device according to any one of claims 1 to 8.

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