Damper Device

Abstract

To suppress the wear of an input rotary body and an output rotary body.SOLUTION: A damper device includes an input rotary body 2, an output rotary body 3, and an elastic member 4. The elastic member 4 elastically connects the input rotary body 2 and the output rotary body 3. A first storage part has a first opposite face and a first support face 242. The first opposite face is directed to the radial inside. The first opposite face is arranged at a space from the first end of the elastic member. The first support face 242 supports a second end 42 of the elastic member 4 from the radial outside. A second storage part has a second support face and second opposite faces 321a, 321b. The second support face supports the first end of the elastic member 4 from the radial outside. The second opposite faces 321a, 321b are arranged at a space from the second end 42 of the elastic member 4.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a bicycle equipped with a damper device. The damper device mounted on this bicycle rotates only in a first rotational direction and does not rotate in a second rotational direction. The damper device has an input plate, an output plate, and an elastic member. The input plate has an input window, and the output plate has an output window. Elastic members are arranged within the input and output windows.

[0003] In the damper device configured in this manner, rotation is transmitted from the input plate to the output plate via the elastic member, so that the rotation of the drive wheels can be stabilized. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-59347 Summary of the Invention [Problem to be solved by the invention]

[0005] When the damper device rotates, the elastic members move radially outward due to centrifugal force, and the elastic members slide against the input plate and the output plate, causing wear on the input plate and the output plate.

[0006] An object of the present invention is to suppress wear of the input rotor and the output rotor. [Means for solving the problem]

[0007] A damper device according to a first aspect is configured to rotate in a first rotational direction. The damper device includes an input rotor, an output rotor, and an elastic member. The input rotor has a first housing portion. The output rotor is arranged to be rotatable relative to the input rotor. The output rotor has a second housing portion. The second housing portion is arranged to overlap the first housing portion in an axial view. The elastic member is housed in the first and second housing portions. The elastic member elastically connects the input rotor and the output rotor. The elastic member has a first end and a second end. The first end is an end arranged on the first rotational direction side. The second end is an end arranged on the second rotational direction side. The second rotational direction refers to a rotational direction opposite to the first rotational direction. The first housing portion has a first opposing surface and a first support surface. The first opposing surface faces radially inward. The first opposing surface is arranged at a distance from the first end of the elastic member. The first support surface is configured to support the second end of the elastic member from the radially outer side. The second accommodating portion has a second support surface and a second opposing surface. The second support surface is configured to support the first end of the elastic member from the radially outer side. The second opposing surface faces radially inward. The second opposing surface is disposed at a distance from the second end of the elastic member.

[0008] According to this configuration, when the damper device rotates in a first rotational direction, the first end of the elastic member is supported by the second support surface of the output rotor, and the second end is supported by the first support surface of the input rotor. Therefore, the first end of the elastic member rotates relative to the input rotor, and the second end of the elastic member rotates relative to the output rotor. Here, the first end of the elastic member faces the first opposing surface of the input rotor, which rotates relative to the input rotor, but the first opposing surface is spaced apart from the first end. Therefore, the first end of the elastic member does not slide against the input rotor. Therefore, wear on the input rotor can be suppressed. Furthermore, the second end of the elastic member faces the second opposing surface of the output rotor, which rotates relative to the input rotor, but the second opposing surface is spaced apart from the second end. Therefore, the second end of the elastic member does not slide against the output rotor. Therefore, wear on the output rotor can be suppressed.

[0009] A damper device according to a second aspect is the damper device according to the first aspect, further comprising a restricting mechanism. The restricting mechanism is configured to restrict axial movement of the second end of the elastic member. The output rotor has a pair of output plates spaced apart in the axial direction. The input rotor is disposed between the pair of output plates.

[0010] A damper device according to a third aspect is the damper device according to the second aspect, wherein the restriction mechanism has a third support surface and a fourth support surface. The third support surface faces the input rotor in the axial direction and is configured to support the elastic member in the axial direction. The fourth support surface is disposed on the opposite side of the third support surface with respect to the input rotor in the axial direction. The fourth support surface faces the input rotor in the axial direction and is configured to support the elastic member in the axial direction.

[0011] A damper device according to a fourth aspect is the damper device according to the second or third aspect, wherein the regulating mechanism includes a pair of regulating plates. The pair of regulating plates are disposed between the pair of output plates and the input rotor. The pair of regulating plates are configured to rotate integrally with the input rotor.

[0012] A damper device according to a fifth aspect is the damper device according to the second or third aspect, wherein the input rotor has a support portion including a third support surface and a fourth support surface.

[0013] A damper device according to a sixth aspect is the damper device according to any one of the second to fifth aspects, wherein the output plate has a cut-and-raised portion. The cut-and-raised portion is disposed radially outward of the elastic member and configured to restrict axial movement of the elastic member.

[0014] A damper device according to a seventh aspect is the damper device according to the first aspect, further comprising a restricting mechanism. The restricting mechanism is configured to restrict axial movement of the first end of the elastic member. The input rotor has a pair of input plates. The pair of input plates are arranged with a gap in the axial direction. The output rotor is arranged between the pair of input plates.

[0015] In an eighth aspect of the damper device, in the damper device of the seventh aspect, the restriction mechanism has a third support surface and a fourth support surface. The third support surface faces the output rotor in the axial direction and is configured to support the elastic member in the axial direction. The fourth support surface is disposed on the opposite side of the third support surface with respect to the output rotor in the axial direction, and is configured to face the output rotor in the axial direction and support the elastic member in the axial direction.

[0016] A damper device according to a ninth aspect is the damper device according to the seventh or eighth aspect, wherein the regulating mechanism includes a pair of regulating plates. The pair of regulating plates is disposed between the pair of input plates and the output rotor. The pair of regulating plates is configured to rotate integrally with the output rotor.

[0017] A damper device according to a tenth aspect is the damper device according to the seventh or eighth aspect, wherein the output rotor has a support portion including a third support surface and a fourth support surface.

[0018] A damper device according to an eleventh aspect is the damper device according to any one of the seventh to tenth aspects, wherein the input plate has a cut-and-raised portion. The cut-and-raised portion is disposed radially outward of the elastic member and configured to restrict axial movement of the elastic member. [Effects of the Invention]

[0019] According to the present invention, wear on the input rotor and the output rotor can be suppressed. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. [Figure 2] Cross-sectional view of line II-II in Figure 1. [Figure 3] FIG. 4 is a front view of the damper device with the first output plate removed. [Figure 4] FIG. [Figure 5] Cross-sectional view of line VV in Figure 1. [Figure 6] FIG. [Figure 7] Cross-sectional view taken along line VII-VII in Figure 1. [Figure 8] FIG. 2 is a front view of the damper device with the first output plate, the first restricting plate, and the input rotor removed. [Figure 9] FIG. 10 is a front view showing the relative positions of the first housing portion, the second housing portion, and the elastic member in a rotated state. [Figure 10] 6 is a cross-sectional view corresponding to FIG. 5 of a damper device according to a modified example. [Figure 11] 8 is a cross-sectional view corresponding to FIG. 7 of a damper device according to a modified example. [Figure 12] 6 is a cross-sectional view corresponding to FIG. 5 of a damper device according to a modified example. [Figure 13] 6 is a cross-sectional view corresponding to FIG. 5 of a damper device according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0021] The damper device according to this embodiment will be described below with reference to the drawings. In the following description, the axial direction refers to the direction in which the rotation axis of the damper device extends. The circumferential direction refers to the circumferential direction of a circle centered on the rotation axis, and the radial direction refers to the radial direction of a circle centered on the rotation axis. The first rotation direction R1 refers to the direction in which the damper device rotates, and the second rotation direction R2 refers to the rotation direction opposite to the first rotation direction.

[0022] Fig. 1 is a front view of the damper device, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. As shown in Figs. 1 and 2, the damper device 100 has an input rotor 2, an output rotor 3, a plurality of elastic members 4, and a restriction mechanism 5. The damper device 100 also has a plurality of stop pins 6.

[0023] The damper device 100 is mounted on, for example, a bicycle. The damper device 100 is configured to transmit torque from a crankshaft (not shown) to a drive wheel (not shown). The damper device 100 is configured to rotate in a first rotational direction R1. The damper device 100 does not rotate in a second rotational direction R2. In this embodiment, the clockwise direction in FIG. 1 is the first rotational direction R1, and the counterclockwise direction in FIG. 1 is the second rotational direction R2.

[0024] Input Rotor Fig. 3 is a front view of the damper device 100 with a first output plate 31a (described later) removed. As shown in Fig. 3, the input rotor 2 is arranged to be rotatable in a first rotation direction R1. The input rotor 2 does not rotate in a second rotation direction R2.

[0025] Torque is input to the input rotor 2 from the crankshaft. The input rotor 2 is configured to rotate integrally with the crankshaft. For example, the input rotor 2 is disk-shaped and has a spline hole 21 in the center. The crankshaft is spline-fitted into this spline hole 21.

[0026] The input rotor 2 has a hub portion 22 and a flange portion 23. The hub portion 22 is cylindrical and extends in the axial direction. The hub portion 22 has a spline hole 21. The flange portion 23 extends radially outward from the hub portion 22.

[0027] The input rotor 2 has a plurality of first accommodating portions 24. In this embodiment, the input rotor 2 has three first accommodating portions 24. The first accommodating portions 24 are arranged at intervals in the circumferential direction. The first accommodating portions 24 are arranged at equal intervals. The first accommodating portions 24 are formed in the flange portion 23.

[0028] The input rotor 2 has stopper surfaces 25. In this embodiment, the input rotor 2 has three stopper surfaces 25. The stopper surfaces 25 face in the second rotation direction R2.

[0029] The input rotor 2 can be made of, for example, iron, stainless steel, carbon fiber reinforced plastic (CFRP), or the like.

[0030] [Output rotor] 1 and 2, the output rotor 3 is arranged to be rotatable in a first rotation direction R1. The output rotor 3 is arranged to be rotatable relative to the input rotor 2. The output rotor 3 does not rotate in a second rotation direction R2.

[0031] The output rotor 3 has first and second output plates 31a, 31b. In the following description, the first and second output plates 31a, 31b are collectively referred to as a pair of output plates 31a, 31b. Since the first and second output plates 31a, 31b have substantially the same configuration, the following description will focus on the first output plate 31a, and a detailed description of the second output plate 31b will be omitted. In order to distinguish between the first output plate 31a and the second output plate 31b, the reference numerals for the first output plate 31a will have the suffix "a" added, and the reference numerals for the second output plate 31b will have the suffix "b".

[0032] The pair of output plates 31a, 31b are spaced apart from each other in the axial direction. The input rotor 2 is disposed between the pair of output plates 31a, 31b. Specifically, the flange portion 23 of the input rotor 2 is disposed between the pair of output plates 31a, 31b in the axial direction.

[0033] The pair of output plates 31a, 31b are fixed to each other by a plurality of stop pins 6. Therefore, the pair of output plates 31a, 31b rotate integrally with each other. The stop pins 6 extend in the axial direction through cutouts in the input rotor 2. When the stop pins 6 abut against the stopper surfaces 25, the input rotor 2 is restricted from rotating relative to the output rotor 3 in the second rotation direction R2 from the neutral position. The neutral position refers to the position of each component when no torque is input to the damper device 100.

[0034] The first output plate 31a is disk-shaped and has a through-hole in the center, through which the hub portion 22 of the input rotor 2 extends in the axial direction.

[0035] The first output plate 31a has a plurality of second accommodating portions 32a. In this embodiment, the first output plate 31a has three second accommodating portions 32a. The second accommodating portions 32a are arranged on the outer periphery of the first output plate 31a.

[0036] The second housing portions 32a penetrate the first output plate 31a in the axial direction. The second housing portions 32a extend in the circumferential direction. The second housing portions 32a are arranged on substantially the same circumference. The second housing portions 32a are arranged to face the first housing portions 24. In other words, the second housing portions 32a are arranged to overlap the first housing portions 24 when viewed in the axial direction.

[0037] The first output plate 31a has a first cut-and-raised portion 33a and a second cut-and-raised portion 34a. The first cut-and-raised portion 33a and the second cut-and-raised portion 34a are formed by cutting and raising a part of the first output plate 31a.

[0038] The first cut-and-raised portion 33a is disposed radially outward from the elastic member 4. The first cut-and-raised portion 33a is configured to restrict axial movement of the elastic member 4. Specifically, the first cut-and-raised portion 33a is disposed so as to overlap with the elastic member 4 when viewed in the axial direction. The first cut-and-raised portion 33a is disposed at a distance from the elastic member 4, except for a partial region, and is not in contact with the elastic member 4.

[0039] When viewed in the axial direction, the first cut-and-raised portion 33a overlaps with the outer peripheral end portion of the first accommodating portion 24. The outer peripheral end portion of the first accommodating portion 24 means the radially outer end portion of the first accommodating portion 24.

[0040] The first cut-and-raised portion 33a extends in the circumferential direction. The first cut-and-raised portion 33a extends from the radially outer side toward the radially inner side. The first cut-and-raised portion 33a extends in a direction away from the input rotor 2 as it moves radially inward.

[0041] The second cut-and-raised portion 34a is disposed radially inward relative to the elastic member 4. The second cut-and-raised portion 34a is configured to restrict axial movement of the elastic member 4. Specifically, the second cut-and-raised portion 34a is disposed so as to overlap with the elastic member 4 when viewed in the axial direction. The second cut-and-raised portion 34a is disposed at a distance from the elastic member 4, except for a partial region, and is not in contact with the elastic member 4.

[0042] When viewed in the axial direction, the second cut-and-raised portion 34a overlaps with the inner peripheral end portion of the first accommodating portion 24. The inner peripheral end portion of the first accommodating portion 24 refers to the radially inner end portion of the first accommodating portion 24.

[0043] The second raised portion 34a extends in the circumferential direction. The second raised portion 34a extends from the radially inner side to the radially outer side. The second raised portion 34a extends in a direction away from the input rotor 2 as it extends radially outward.

[0044] The first output plate 31a can be made of, for example, iron, stainless steel, carbon fiber reinforced plastic (CFRP), or the like.

[0045] A sprocket (not shown) is attached to the output rotor 3. For example, the sprocket is attached to the first output plate 31a or the second output plate 31b. The sprocket has a plurality of teeth on its outer circumferential edge. A chain is hung on this sprocket, and torque is transmitted from the sprocket to a drive wheel (not shown) via the chain or the like.

[0046] [Elastic member] As shown in FIGS. 1 to 3, the elastic member 4 is accommodated in the first accommodation portion 24 and the second accommodation portions 32a and 32b. The elastic member 4 is, for example, a coil spring. The elastic member 4 has a first end portion 41 and a second end portion 42 in the circumferential direction. The first end portion 41 is the end portion of the elastic member 4 on the side of the first rotation direction R1. The second end portion 42 is the end portion of the elastic member 4 on the side of the second rotation direction R2.

[0047] The elastic member 4 elastically connects the input rotor 2 and the output rotor 3. That is, torque from the input rotor 2 is transmitted to the output rotor 3 via the elastic member 4. The elastic member 4 also rotates together with the input rotor 2 and the output rotor 3.

[0048] [Details of each storage compartment] Fig. 4 is an enlarged front view of the first accommodating portion 24. As shown in Fig. 4, the first accommodating portion 24 extends in the circumferential direction. The first accommodating portion 24 penetrates the input rotor 2 in the thickness direction. The first accommodating portion 24 has a substantially rectangular shape when viewed from the front.

[0049] The first accommodating portion 24 has a first opposing surface 241 and a first supporting surface 242. The first opposing surface 241 and the first supporting surface 242 are part of a first inner wall surface 243. The first inner wall surface 243 is part of a surface that defines the first accommodating portion 24. The first inner wall surface 243 faces radially inward.

[0050] The first opposing surface 241 is disposed at an end of the first inner wall surface 243 on the first rotation direction R1 side. The first opposing surface 241 faces radially inward. The first opposing surface 241 is disposed at a distance from the first end 41 of the elastic member 4 in the radial direction.

[0051] The first support surface 242 is disposed at the end of the first inner wall surface 243 on the second rotation direction R2 side. The first support surface 242 faces radially inward. That is, the first support surface 242 faces the second end 42 of the elastic member 4 in the radial direction.

[0052] Fig. 5 is a cross-sectional view taken along line VV in Fig. 1. As shown in Fig. 4 and Fig. 5, the first support surface 242 is configured to support the second end 42 of the elastic member 4 from the radially outer side. Specifically, the first support surface 242 supports the second end 42 of the elastic member 4 when the second end 42 of the elastic member 4 moves radially outward due to centrifugal force.

[0053] When the damper device 100 is not rotating and is at a standstill, the first support surface 242 may or may not be in contact with the second end 42 of the elastic member 4. When the first support surface 242 is not in contact with the second end 42, the distance between the first support surface 242 and the second end 42 is smaller than the distance between second opposing surfaces 321a, 321b (described later) and the second end 42. Therefore, when the damper device 100 rotates and the second end 42 of the elastic member 4 moves radially outward, the second end 42 comes into contact with the first support surface 242 but does not come into contact with the second opposing surfaces 321a, 321b.

[0054] 6 is an enlarged front view of the second housing portion 32b. The other second housing portion 32a has the same configuration, so a detailed description thereof will be omitted.

[0055] 6, the second accommodating portion 32b extends in the circumferential direction. The second accommodating portion 32b penetrates the output plate 31b in the thickness direction. The second accommodating portion 32b has a substantially rectangular shape when viewed from the front.

[0056] The second housing portion 32b has a second opposing surface 321b and a second support surface 322b. The second opposing surface 321b and the second support surface 322b are part of a second inner wall surface 323b. The second inner wall surface 323b is part of a surface that defines the second housing portion 32b. The second inner wall surface 323b faces radially inward.

[0057] The second opposing surface 321b is disposed at the end of the second inner wall surface 323b on the second rotation direction R2 side. The second opposing surface 321b faces radially inward. The second opposing surface 321b is disposed at a distance from the second end 42 of the elastic member 4 in the radial direction.

[0058] The second support surface 322b is disposed at the end of the second inner wall surface 323b on the first rotation direction R1 side. The second support surface 322b faces radially inward. That is, the second support surface 322b faces the first end 41 of the elastic member 4 in the radial direction.

[0059] Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 1. As shown in Fig. 6 and Fig. 7, the second support surfaces 322a and 322b are configured to support the first end 41 of the elastic member 4 from the radially outer side. Specifically, the second support surface 322a of the first output plate 31a and the second support surface 322b of the second output plate 31b support the first end 41 of the elastic member 4 when the first end 41 of the elastic member 4 moves radially outward due to centrifugal force.

[0060] The second support surfaces 322a, 322b may or may not be in contact with the first end 41 of the elastic member 4. When the second support surfaces 322a, 322b are not in contact with the first end 41, the distance between the second support surfaces 322a, 322b and the first end 41 is smaller than the distance between the first opposing surface 241 and the first end 41. Therefore, when the damper device 100 rotates and the first end 41 of the elastic member 4 moves radially outward, the first end 41 comes into contact with the second support surfaces 322a, 322b, but does not come into contact with the first opposing surface 241.

[0061] [Regulatory Organization] 8 is a front view of the damper device 100 with the first output plate 31a, the first restricting plate 51a, and the input rotor 2 removed. As shown in FIGS. 3, 5, and 8, the restricting mechanism 5 is configured to restrict axial movement of the second end 42 of the elastic member 4.

[0062] The restriction mechanism 5 has first and second restriction plates 51a, 51b. In the following description, the first and second restriction plates 51a, 51b are collectively referred to as a pair of restriction plates 51a, 51b. Since the first and second restriction plates 51a, 51b have substantially the same configuration, the following description will focus on the first restriction plate 51a, and a detailed description of the second restriction plate 51b will be omitted. In order to distinguish between the first restriction plate 51a and the second restriction plate 51b, the reference numerals for the first restriction plate 51a will have an "a" suffix, and the reference numerals for the second restriction plate 51b will have an "b" suffix.

[0063] The input rotor 2 is disposed axially between a pair of regulating plates 51a, 51b. The pair of regulating plates 51a, 51b are configured to rotate integrally with the input rotor 2. More specifically, a plurality of insertion holes are formed in the input rotor 2. The pair of regulating plates 51a, 51b are formed with protrusions 52a, 52b that fit into the insertion holes.

[0064] The pair of regulating plates 51a, 51b are disposed between the pair of output plates 31a, 31b and the input rotor 2. Specifically, the first regulating plate 51a is disposed between the first output plate 31a and the input rotor 2. The second regulating plate 51b is disposed between the second output plate 31b and the input rotor 2.

[0065] The first regulating plate 51a has an annular shape. The first regulating plate 51a has a plurality of regulating portions 53a. Each regulating portion 53a is disposed at a position facing the second end portion 42 of the elastic member 4. Each regulating portion 53a is a portion of the first regulating plate 51a that protrudes radially outward.

[0066] Each restricting portion 53a has a third support surface 54a. The third support surface 54a is configured to support the second end 42 of the elastic member 4 in the axial direction. More specifically, the third support surface 54a faces the input rotor 2 in the axial direction. The third support surface 54a also faces radially outward. Because of this configuration, the third support surface 54a can restrict the second end 42 of the elastic member 4 from moving axially relative to the input rotor 2 toward the first output plate 31a.

[0067] Each of the restricting portions 53b of the second restricting plate 51b has a fourth support surface 54b. The fourth support surface 54b is configured to support the second end 42 of the elastic member 4 in the axial direction. The fourth support surface 54b is configured to support the second end 42 from the side opposite to the third support surface 54a in the axial direction.

[0068] More specifically, the fourth support surface 54b is disposed on the opposite side of the third support surface 54a in the axial direction with the input rotor 2 as the reference. The fourth support surface 54b faces the input rotor 2 in the axial direction. The fourth support surface 54b also faces radially outward. With this configuration, the fourth support surface 54b can restrict the second end 42 of the elastic member 4 from moving axially with the input rotor 2 as the reference toward the second output plate 31b.

[0069] As described above, the second end 42 of the elastic member 4 is configured to be supported at three points: the first support surface 242, the third support surface 54a, and the fourth support surface 54b.

[0070] [Operation] The operation of the damper device 100 configured as described above will be described. First, when torque is input to the input rotor 2 by, for example, the driver pedaling, the input rotor 2 rotates in a first rotational direction R1. Then, the torque is transmitted from the input rotor 2 to the output rotor 3 via the elastic member 4. As a result, the output rotor 3 rotates in the first rotational direction R1, and the torque is transmitted to the drive wheels.

[0071] When the damper device 100 rotates in the first rotational direction R1 in this manner, the input rotor 2 rotates in the first rotational direction R1 relative to the output rotor 3. Figure 9 is a diagram showing the positional relationship between the first housing portion 24, the second housing portions 32a and 32b, and the elastic member 4 when the damper device 100 rotates in the first rotational direction R1. The first housing portion 24 is indicated by a solid line, and the second housing portions 32a and 32b are indicated by a two-dot chain line.

[0072] 9, when the damper device 100 rotates in the first rotational direction R1, the first end 41 of the elastic member 4 is supported by the output rotor 3, and the second end 42 of the elastic member 4 is supported by the input rotor 2. Here, because the elastic member 4 moves radially outward due to centrifugal force, the first end 41 of the elastic member 4 is supported mainly by the second support surfaces 322a, 322b. On the other hand, the second end 42 of the elastic member 4 is supported mainly by the first support surface 242.

[0073] Here, the first opposing surface 241 is disposed at a distance from the first end 41 of the elastic member 4, and therefore the first opposing surface 241 does not slide against the elastic member 4. This prevents the input rotor 2 from wearing out. Furthermore, the second opposing surfaces 321a, 321b are disposed at a distance from the second end 42 of the elastic member 4, and therefore the second opposing surfaces 321a, 321b do not slide against the elastic member 4. This prevents the output rotor 3 from wearing out.

[0074] [Variations] Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications are possible without departing from the spirit of the present invention. Note that the following modifications can basically be applied simultaneously.

[0075] (a) In the above embodiment, the output rotor 3 has a pair of output plates 31a, 31b, and the input rotor 2 is disposed between the pair of output plates 31a, 31b. However, the configuration of the damper device 100 is not limited to this. For example, as shown in FIGS. 10 and 11, the input rotor 2 may have a pair of input plates 21a, 21b, and the output rotor 3 may be disposed between the pair of input plates 21a, 21b. In other words, the input rotor and the output rotor in the above embodiment may be interchanged. Note that FIG. 10 is a view corresponding to FIG. 5 of the above embodiment, and FIG. 11 is a view corresponding to FIG. 7 of the above embodiment.

[0076] In this modification, the input rotor 2 has first support surfaces 222a and 222b for supporting the second end 42 of the elastic member 4. The output rotor 3 has a second support surface 342 for supporting the first end 41 of the elastic member 4. The input rotor 2 also has first opposing surfaces 221a and 221b that are spaced apart from the first end 41 of the elastic member 4. The output rotor 3 has a second opposing surface 341 that is spaced apart from the second end 42 of the elastic member 4.

[0077] 11, in this modification, the pair of regulating plates 51a, 51b are disposed between the pair of input plates 21a, 21b and the output rotor 3. The pair of regulating plates 51a, 51b are configured to rotate integrally with the output rotor 3.

[0078] The restricting mechanism 5 is configured to restrict axial movement of the first end 41 of the elastic member 4. The third support surface 54a is configured to support the first end 41 of the elastic member 4 in the axial direction. Specifically, the third support surface 54a faces the output rotor 3 in the axial direction. The third support surface 54a also faces radially outward. Because of this configuration, the third support surface 54a can restrict movement of the first end 41 of the elastic member 4 toward the first input plate 21a in the axial direction relative to the output rotor 3.

[0079] The fourth support surface 54b is configured to support, in the axial direction, the first end 41 of the elastic member 4. The fourth support surface 54b is configured to support, in the axial direction, the first end 41 from the side opposite to the third support surface 54a.

[0080] More specifically, the fourth support surface 54b is disposed on the opposite side of the third support surface 54a in the axial direction with the output rotor 3 as the reference. The fourth support surface 54b faces the output rotor 3 in the axial direction. The fourth support surface 54b also faces radially outward. With this configuration, the fourth support surface 54b can restrict the first end 41 of the elastic member 4 from moving axially with the output rotor 3 as the reference toward the second input plate 21b.

[0081] As described above, in this modified example, the first end 41 of the elastic member 4 is configured to be supported at three points: the second support surface 342, the third support surface 54a, and the fourth support surface 54b.

[0082] The input plates 21a and 21b also have first cut-and-raised portions 23a and 23b, which are configured to restrict the movement of the elastic member 4 in the axial direction.

[0083] (b) In the above embodiment, the restriction mechanism 5 is configured by a pair of restriction plates 51a, 51b, but the configuration of the restriction mechanism 5 is not limited to this. For example, as shown in FIG. 12 , the input rotor 2 has a support portion 26. The support portion 26 has a Y-shaped cross section. The support portion 26 has a third support surface 54a and a fourth support surface 54b. Note that spacers 7a, 7b are disposed axially between the input rotor 2 and the pair of output plates 31a, 31b instead of restriction plates.

[0084] Although the support portion 26 is configured to support the elastic member 4 from the radially inner side, as shown in Fig. 13, the support portion 26 may be configured to support the elastic member 4 from the radially outer side. In this case, the first support surface 242, the third support surface 54a, and the fourth support surface 54b may be continuously and smoothly connected. [Explanation of symbols]

[0085] 2: Input rotor 24: First storage section 241: First opposing surface 242: 1st support surface 26: Support part 3: Output rotor 31a: First output plate 31b: Second output plate 32a, 32b: Second storage section 321a, 321b: Second facing surface 322a, 322b: Second support surface 33a, 33b: First cut-up section 4: Elastic material 41:First end 42:Second end 5: Regulatory mechanisms 51a: First Restriction Plate 51b: Second regulation plate 54a: 3rd support surface 54b: 4th support surface 100: Damper device

Claims

1. 1. A damper device configured to rotate in a first rotational direction, an input rotor having a first housing portion; an output rotor having a second housing portion arranged to overlap the first housing portion when viewed in the axial direction, the output rotor being arranged to be rotatable relative to the input rotor; an elastic member accommodated in the first accommodation portion and the second accommodation portion and elastically connecting the input rotor and the output rotor; Equipped with the elastic member has a first end portion disposed on the first rotation direction side and a second end portion disposed on the second rotation direction side opposite to the first rotation direction, The first accommodating portion has a first opposing surface facing radially inward and disposed at a distance from the first end of the elastic member, and a first support surface configured to support the second end of the elastic member from the radially outer side, The second accommodating portion has a second support surface configured to support the first end of the elastic member from the radially outer side, and a second opposing surface facing radially inward and disposed at a distance from the second end of the elastic member. Damper device.

2. a restricting mechanism configured to restrict axial movement of the second end of the elastic member; the output rotor has a pair of output plates spaced apart in the axial direction, The input rotor is disposed between the pair of output plates. The damper device according to claim 1 .

3. the regulating mechanism has a third support surface that faces the input rotor in the axial direction and is configured to support the elastic member in the axial direction, and a fourth support surface that is disposed on the opposite side of the third support surface with the input rotor as a reference in the axial direction, faces the input rotor in the axial direction, and is configured to support the elastic member in the axial direction. The damper device according to claim 2 .

4. the restriction mechanism includes a pair of restriction plates disposed between the pair of output plates and the input rotor and configured to rotate integrally with the input rotor; The damper device according to claim 2 .

5. the input rotor has a support portion including the third support surface and the fourth support surface. The damper device according to claim 3 .

6. the output plate has a cut-and-raised portion disposed radially outward of the elastic member and configured to restrict axial movement of the elastic member. The damper device according to any one of claims 2 to 5.

7. a restricting mechanism configured to restrict axial movement of the first end of the elastic member; the input rotor has a pair of input plates spaced apart in the axial direction; The output rotor is disposed between the pair of input plates. The damper device according to claim 1 .

8. the regulating mechanism has a third support surface that faces the output rotor in the axial direction and is configured to support the elastic member in the axial direction, and a fourth support surface that is disposed on the opposite side of the third support surface with the output rotor as a reference in the axial direction, faces the output rotor in the axial direction, and is configured to support the elastic member in the axial direction. The damper device according to claim 7.

9. the restriction mechanism includes a pair of restriction plates disposed between the pair of input plates and the output rotor and configured to rotate integrally with the output rotor; The damper device according to claim 7.

10. the output rotor has a support portion including the third support surface and the fourth support surface. The damper device according to claim 8.

11. the input plate has a cut-and-raised portion disposed radially outward of the elastic member and configured to restrict axial movement of the elastic member. The damper device according to any one of claims 7 to 10.

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