Damper device

Abstract

To provide a damper device comprising a stopper having improved performance.SOLUTION: A damper device comprises: a first rotor (100) including a first plate (100A) which is rotated around a rotation axis (O) and a second plate (100B) which faces the first plate and is rotated around the rotation axis integrally with the first plate; and a second rotor (200) rotated around the rotation axis in relative to the first rotor by elongating / contracting an elastic mechanism part (300), which is disposed between the second rotor and the first rotor, and including an engage part (208) protruding at an outer peripheral edge. The first plate includes a first contraction part (120) which is recessed from a first principal surface (140) of the first plate toward the second plate. The second plate includes a second contraction part (150) which is recessed from a second principal surface (170) of the second plate toward the first contraction part and fixed to the first contraction part by a fastening member. At least one contraction part is abutted to an engage part of the second rotor, which is rotated in relative to the first rotor, thereby regulating rotations of the second rotor which reduce the elastic mechanism part.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The technology disclosed in this application relates to a damper device.

Background Art

[0002] In a vehicle or the like, a damper device for absorbing the vibration of torque transmitted from a drive source such as an engine toward a transmission is provided on the torque transmission path between the drive source and the transmission.

[0003] As an example of such a damper device, the damper device disclosed in Patent Document 1 is known. The damper device disclosed in Patent Document 1 includes a lining plate (reference numeral 100 in Patent Document 1) to which power is transmitted from a flywheel, a first plate (reference numeral 201 in Patent Document 1) to which power is transmitted from the lining plate and rotates around a rotation axis, and a second plate (reference numeral 202 in Patent Document 1) that is disposed opposite to the first plate and rotates integrally with the first plate, a disk plate (reference numeral 200 in Patent Document 1), and a hub (reference numeral 300 in Patent Document 1) that is elastically connected to the disk plate with an elastic mechanism portion (reference numeral 400 in Patent Document 1) sandwiched therebetween and rotates relative to the disk plate.

[0004] In the damper device disclosed in Patent Document 1, a protrusion (reference numeral 306 in Patent Document 1) provided on the outer peripheral edge of the hub abuts against a regulating portion (reference numeral 210 in Patent Document 1) which is the outer edge of a notch provided in the first plate and is formed by bending this plate, thereby functioning as a stopper for regulating relative rotation of the hub with respect to the disk plate by a predetermined angle or more (see FIG. 4 of Patent Document 1).

[0005] As another example of a damper device, a damper device disclosed in Patent Document 2 is known. The damper device disclosed in Patent Document 2 includes a drive disk (reference numeral 2 in Patent Document 2) to which power is transmitted from an engine, a flange portion (reference numeral 15 in Patent Document 2) coupled to the drive disk via a spring, and a hub portion (reference numeral 16 in Patent Document 2) fixed to the flange portion.

[0006] In the damper device disclosed in Patent Document 2, the flange portion fixed to the hub portion functions as a stopper for restricting relative rotation of the hub portion with respect to the drive disk by more than a predetermined angle by abutting against rivets (reference numerals 23, 24, etc. in Patent Document 2) fixed to the drive disk (see FIG. 1 of Patent Document 2).

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, in the damper device disclosed in Patent Document 1, since the restricting portion is formed by bending the first plate, the size of the portion that abuts against the protruding portion of the hub in the restricting portion cannot be made larger than the plate thickness of the first plate. Therefore, the pressure (surface pressure) applied by the protruding portion of the hub becomes large with respect to the portion that abuts against the protruding portion of the hub in the restricting portion, and stress is locally concentrated. Therefore, it is considered necessary to take some measures to reinforce the strength of the restricting portion.

[0009] On the other hand, in the damper device disclosed in Patent Document 2, since the flange portion repeatedly abuts against the rivet fixed to the drive disk, that is, torque is repeatedly input, the rivet that needs to be formed of a soft material loosens or deforms with respect to the drive disk. As a result, there is a problem that the rivet loses its function as a stopper.

[0010] Therefore, the technology disclosed in the present application provides a damper device provided with a stopper having improved performance.

Means for Solving the Problems

[0011] The damper device according to one aspect includes "a first plate to which power is transmitted from a flywheel and which rotates around a rotating shaft, and a second plate that is disposed opposite to the first plate with a distance therebetween and that rotates integrally with the first plate around the rotating shaft, a first rotating body including the second plate, and an elastic mechanism portion disposed between the first rotating body along the circumferential direction to expand or contract, and rotates relative to the first rotating body around the rotating shaft, and a second rotating body including an engaging portion that protrudes radially outward at the outer peripheral edge, and the first plate includes a first throttle portion that is recessed from the first main surface of the first plate in a direction approaching the second plate, and the second plate is provided opposite to the first throttle portion, is recessed from the second main surface of the second plate in a direction approaching the first throttle portion, and includes a second throttle portion fixed to the first throttle portion using a fastening member, and the first throttle portion and the second throttle portion abut against the engaging portion of the second rotating body that is in a state of rotating relative to the first rotating body, and further rotation of the second rotating body in a direction to contract the elastic mechanism portion is restricted." The configuration can be adopted.

Advantages of the Invention

[0012] According to the technology disclosed in the present application, a damper device provided with a stopper having improved performance can be provided.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 7C

Figure 8A

Figure 8B

Figure 8C

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0014] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are given to common components. Also, note that components shown in one drawing may be omitted in another drawing for convenience of explanation. Furthermore, note that the attached drawings are not necessarily drawn to an exact scale.

[0015] 1. Configuration of the damper device Regarding the outline of the configuration of the damper device according to an embodiment, FIGS. 1 to 4 will be referred to for explanation. FIG. 1 is a perspective view schematically showing an example of the configuration of the damper device according to an embodiment. FIG. 2 is a top view schematically showing the configuration of the damper device shown in FIG. 1. FIG. 3 is a perspective view schematically showing a part of the configuration of the damper device shown in FIG. 1. FIG. 4 is a top view schematically showing the configuration of the damper device shown in FIG. 3.

[0016] Note that FIG. 3 shows the damper device in a state where the second disk plate 100B of the disk plate 100 described later is removed from FIG. 1. Similarly, FIG. 4 shows the damper device in a state where the second disk plate 100B described later is removed from FIG. 2.

[0017] The damper device 10 according to one embodiment can transmit the driving force from a driving source such as an engine or a motor to a transmission by being sandwiched between, for example, a flywheel (not shown) and a pressure plate (not shown). Since the structure for sandwiching the damper device 10 between the flywheel and the pressure plate is well-known, a detailed description thereof will be omitted.

[0018] The damper device 10 can absorb and attenuate vibrations in the torsional direction. As shown in FIGS. 1 to 4, this damper device 10 includes a disk plate 100 as a first rotating body to which power is directly transmitted from a flywheel (not shown) or indirectly transmitted via another member, a hub 200 as a second rotating body coupled to the input shaft of a transmission (not shown), and at least one elastic mechanism portion 300 disposed so as to extend along the circumferential direction between the disk plate 100 and the hub 200.

[0019] 1-1. Hub 200 The hub 200 can be disposed on the output side in the power transmission path. The hub 200 is formed of, for example, a metal material, has a shape extending in a substantially annular shape as a whole, and can be rotatably provided around the rotation axis O. As best shown in FIG. 4, the hub 200 can insert the input shaft (not shown) of a transmission (not shown) into a through hole 204 formed in a substantially annular cylindrical portion 202 and spline-couple it to this input shaft.

[0020] Further, the hub 200 can have a plurality of flanges 206 extending radially from the cylindrical portion 202. As an example, as will be described later, corresponding to the disk plate 100 having four accommodation regions 102 (102A, 102B, 102C, 102D), the hub 200 can have a total of four flanges 206 (206A, 206B, 206C, 206D) so that a total of two flanges 206 are positioned at both ends of each accommodation region.

[0021] Focusing on the accommodation region 102A of the disk plate 100, as shown in FIG. 4, a notch 206A1 can be formed on one side of the flange 206A (the right side on the paper surface centered on the flange 206A). This notch 206A1 can support the first sheet member 330 in the elastic mechanism portion 300 accommodated in the accommodation region 102A from the outer circumferential side.

[0022] On the other hand, a notch 206D2 can be formed on the other side of the flange 206D (the left side on the paper surface centered on the flange 206D). This notch 206D2 can support the second sheet member 332 in the elastic mechanism portion 300 accommodated in the accommodation region 102A from the outer circumferential side.

[0023] Focusing on the accommodation region 102B of the disk plate 100, as shown in FIG. 4, a notch 206B1 can be formed on one side of the flange 206B (the upper side on the paper surface centered on the flange 206B). This notch 206B1 can support the first sheet member 330 in the elastic mechanism portion 300 accommodated in the accommodation region 102B from the outer circumferential side.

[0024] On the other hand, a notch 206A2 can be formed on the other side of the flange 206A (the left side on the paper surface centered on the flange 206A). This notch 206A2 can support the second sheet member 332 in the elastic mechanism portion 300 accommodated in the accommodation region 102B from the outer circumferential side.

[0025] Focusing on the accommodation region 102C of the disk plate 100, as shown in FIG. 4, a notch 206C1 can be formed on one side of the flange 206C (the lower side on the paper surface centered on the flange 206C). This notch 206C1 can support the first sheet member 330 in the elastic mechanism portion 300 accommodated in the accommodation region 102C from the outer circumferential side.

[0026] On the other side of the flange 206B (the lower side centered on the flange 206B on the paper surface), a notch 206B2 can be formed. This notch 206B2 can support the second sheet member 332 in the elastic mechanism portion 300 accommodated in the accommodation region 102C from the outer circumferential side.

[0027] Focusing on the accommodation region 102D of the disk plate 100, as shown in FIG. 4, on one side of the flange 206D (the right side centered on the flange 206D on the paper surface), a notch 206D1 can be formed. This notch 206D1 can support the first sheet member 330 in the elastic mechanism portion 300 accommodated in the accommodation region 102D from the outer circumferential side.

[0028] On the other side of the flange 206C (the upper side centered on the flange 206C on the paper surface), a notch 206C2 can be formed. This notch 206C2 can support the second sheet member 332 in the elastic mechanism portion 300 accommodated in the accommodation region 102D from the outer circumferential side.

[0029] Furthermore, the hub 200 can include an engaging portion 208 that protrudes radially outward at the outer peripheral edge of at least one of these flanges 206A to 206D. FIG. 4 shows an example in which the hub 200 includes engaging portions 208A to 208D at the outer peripheral edges of the flanges 206A to 206D, respectively.

[0030] Each engaging portion 208 can have any shape as long as it protrudes radially outward from the outer peripheral edge of the flange 206. For example, as illustrated in FIG. 4, each engaging portion 208 can have a substantially trapezoidal shape in a top view. In another example, each engaging portion 208 can also have a rectangular shape, a circular shape, and / or a combination of these shapes. Also, when a plurality of engaging portions 208 are provided, these plurality of engaging portions 208 can have substantially the same shape as each other or can have different shapes from each other.

[0031] 1-2. Disk plate 100 (1) Basic configuration The disk plate 100 can be arranged on the input side in the power transmission path. The disk plate 100 can be formed of, for example, a metallic material.

[0032] As shown in FIGS. 1 and 2, the disk plate 100 can include a first disk plate 100A and a second disk plate 100B as a pair of members provided on both axial sides of the hub 200. The first disk plate 100A and the second disk plate 100B can each have a generally annular shape as a whole. The first disk plate 100A and the second disk plate 100B are arranged at a distance from each other, and between them, with the hub 200 and the elastic mechanism portion 300 interposed therebetween, they can be provided rotatably with respect to the hub 200 around the central axis O. The first disk plate 100A can be coupled directly to a flywheel (not shown) or to a lining plate fixed to a flywheel (not shown) via a friction material or the like. Thereby, the first disk rate 100A and the second disk plate 100B coupled to the first disk plate 100A can be transmitted power from the flywheel and can rotate around the rotation axis O.

[0033] The first disk plate 100A and the second disk plate 100B can cooperate with each other to form at least one accommodation region 102, here, as an example, four accommodation regions 102A, 102B, 102C, 102D. Each of these accommodation regions 102 can partially accommodate a set of elastic mechanism portions 300 (exposing a part of a set of elastic mechanism portions 300 to the outside). In order to form such an accommodation region 102, the first disk plate 100A and the second disk plate 100B can have openings in portions corresponding to each accommodation region as shown in FIGS. 1 to 4.

[0034] The disk plate 100 can accommodate the elastic mechanism portion 300 in each accommodation area 102. Specifically, as shown in FIGS. 1 to 4, the disk plate 100 can accommodate a set of elastic mechanism portions 300, that is, an elastic body (elastic member) 310 and a first sheet member 330 and a second sheet member 332 disposed on both sides of the elastic body 310, in the accommodation area 102A.

[0035] Similarly, the disk plate 100 can also accommodate the above-described set of elastic mechanism portions 300 (elastic body 310, first sheet member 330, and second sheet member 332) in each of the accommodation areas 102B, 102C, and 102D.

[0036] Furthermore, the disk plate 100 can support the two sheets included in the elastic mechanism portion 300 accommodated in each accommodation area 102. First, focusing on the accommodation area 102A. As shown in FIG. 4, a first end face 104A1 surrounding one end of the accommodation area 102A (opening) in the first disk plate 100A can contact the first sheet member 330 from the outer side in the circumferential direction to support the first sheet member 330. Similarly, as shown in FIG. 2, a first end face 104B1 surrounding one end of the accommodation area 102A (opening) in the second disk plate 100B can contact the first sheet member 330 from the outer side in the circumferential direction to support the first sheet member 330.

[0037] Also, a second end face 104A2 surrounding the other end of the accommodation area 102A (opening) in the first disk plate 100A can contact the second sheet member 332 from the outer side in the circumferential direction to support the second sheet member 332. Similarly, as shown in FIG. 2, a second end face 104B2 surrounding the other end of the accommodation area 102A (opening) in the second disk plate 100B can contact the second sheet member 332 from the outer side in the circumferential direction to support the second sheet member 332.

[0038] Next, focus on the accommodation area 102B. As shown in FIG. 4, the first end face 106A1 surrounding one end of the accommodation area 102B (opening) in the first disk plate 100A can contact the first sheet member 330 from the outer side in the circumferential direction to support the first sheet member 330. Similarly, as shown in FIG. 2, the first end face 106B1 surrounding one end of the accommodation area 102B (opening) in the second disk plate 100B can contact the first sheet member 330 from the outer side in the circumferential direction to support the first sheet member 330.

[0039] Also, as shown in FIG. 4, the second end face 106A2 surrounding the other end of the accommodation area 102B (opening) in the first disk plate 100A can contact the second sheet member 332 from the outer side in the circumferential direction to support the second sheet member 332. Similarly, as shown in FIG. 2, the second end face 106B2 surrounding the other end of the accommodation area 102B (opening) in the second disk plate 100B can contact the second sheet member 332 from the outer side in the circumferential direction to support the second sheet member 332.

[0040] Next, focus on the accommodation area 102C. As shown in FIG. 4, the first end face 108A1 surrounding one end of the accommodation area 102C (opening) in the first disk plate 100A can contact the first sheet member 330 from the outer side in the circumferential direction to support the first sheet member 330. Similarly, as shown in FIG. 2, the first end face 108B1 surrounding one end of the accommodation area 102C (opening) in the second disk plate 100B can contact the first sheet member 330 from the outer side in the circumferential direction to support the first sheet member 330.

[0041] Also, as shown in FIG. 4, the second end face 108A2 surrounding the other end of the accommodation area 102C (opening) in the first disk plate 100A can contact the second sheet member 332 from the outer side in the circumferential direction to support the second sheet member 332. Similarly, as shown in FIG. 2, the second end face 108B2 surrounding the other end of the accommodation area 102C (opening) in the second disk plate 100B can contact the second sheet member 332 from the outer side in the circumferential direction to support the second sheet member 332.

[0042] Next, focus on the accommodation area 102D. As shown in FIG. 4, the first end face 110A1 surrounding one end of the accommodation area 102D (opening) in the first disk plate 100A can contact the first sheet member 330 from the outer side in the circumferential direction and support the first sheet member 330. Similarly, as shown in FIG. 2, the first end face 110B1 surrounding one end of the accommodation area 102A (opening) in the second disk plate 100B can contact the first sheet member 330 from the outer side in the circumferential direction and support the first sheet member 330.

[0043] Also, as shown in FIG. 4, the second end face 110A2 surrounding the other end of the accommodation area 102D (opening) in the first disk plate 100A can contact the second sheet member 332 from the outer side in the circumferential direction and support the second sheet member 332. Similarly, as shown in FIG. 2, the second end face 110B2 surrounding the other end of the accommodation area 102D (opening) in the second disk plate 100B can contact the second sheet member 332 from the outer side in the circumferential direction and support the second sheet member 332.

[0044] (2) Throttle portion Furthermore, the disk plate 100 can include a plurality of throttle portions that function as stoppers for restricting relative rotation of the hub 200 with respect to the disk plate 100 by a predetermined angle or more.

[0045] Hereinafter, the configuration of the throttle portion that functions as such a stopper will be described. Regarding one engaging portion 208 of the hub 200, a total of two throttle portions can be arranged on both sides in the circumferential direction of this engaging portion. One of these two throttle portions contacts the one engaging portion 208 and can restrict rotation by a predetermined angle or more in one direction (clockwise direction or counterclockwise direction) of the hub 200 with respect to the disk plate 100. Similarly, the other of these two throttle portions contacts the one engaging portion 208 and can restrict rotation by a predetermined angle or more in the other direction (counterclockwise direction or clockwise direction).

[0046] As illustrated in FIG. 3, here, since four engaging portions 208 (208A to 208D) are provided, a total of four throttle portions can be formed such that one throttle portion is located between two adjacent engaging portions 208.

[0047] (2A) First throttle portion Referring to FIG. 3 in which the second disk plate 100B is omitted, here, a total of four first throttle portions 120 (120A, 120B, 120C, 120D) can be formed on the first disk plate 100A. The first throttle portions 120A, 120B, 120C, and 120D can be respectively arranged adjacent to the accommodation regions 102A, 102B, 102C, and 102D. In one example, each first throttle portion 120 can be arranged adjacent to the outer diameter side of the corresponding accommodation region 102. By adopting this configuration, compared with a configuration in which each first throttle portion 120 is arranged adjacent to the inner diameter side of the corresponding accommodation region 102, the diameter of the first disk plate 100A can be reduced, and thus the diameter of the disk plate 100 can be reduced.

[0048] Since each first throttle portion 120 can have the same shape as each other, here, focusing on the first throttle portion 120A, in addition to FIGS. 3 and 4, it will be described with reference to FIG. 5. FIG. 5 is a perspective view schematically showing an enlarged view of a part of the configuration of the damper device shown in FIG. 3 from a perspective different from FIG. 3.

[0049] The first throttle portion 120A can have a shape recessed in a direction approaching the second disk plate 100B (upward in the drawing) from the flat first main surface 140 of the first disk plate 100A. The first main surface 140 can extend in a substantially annular shape in the first disk plate 100A, for example.

[0050] Specifically, the first throttle portion 120A can include a first fixing surface 122 extending substantially parallel to the first main surface 140, and a first wall surface 124 surrounding the periphery of the first fixing surface 122 and continuously connecting the first main surface 140 and the first fixing surface 122.

[0051] Substantially the entire first fixing surface 122 can be formed as a plane. The first fixing surface 122 can extend in an arc shape along the circumferential direction of the first disk plate 100A. The first fixing surface 122 can be fixed to a second fixing surface 152 of a second throttling portion 150A (described later) formed on the second disk plate 100B using at least one (a total of three in FIGS. 3 and 4) fastening member (for example, a rivet) R. Thereby, the first disk plate 100A and the second disk plate 100B can be coupled to each other by at least one fastening member R.

[0052] The first wall surface 124 can be formed, for example, by a combination of a plane and a curved surface. Among the first wall surfaces 124, a surface (first contact surface) 126 facing the engaging portion 208A can function as a stopper that contacts the engaging portion 208A and restricts further rotation of the hub 200 in the clockwise direction with respect to the disk plate 100. Also, among the first wall surfaces 124, a surface (first contact surface) 128 facing the engaging portion 208D can function as a stopper that contacts the engaging portion 208D and restricts further rotation of the hub 200 in the counterclockwise direction with respect to the disk plate 100.

[0053] As an example, the first contact surfaces 126 and 128 can be arranged on a circumference extending with the distance between the rotation center O of the damper device 10 and the fastening member R as the radius, that is, at a position overlapping the circumference. According to such a configuration, compared with a configuration in which the first contact surfaces 126 and 128 are arranged at a position not on the circumference, that is, not overlapping the circumference, the diameter of the first disk plate 100A can be made smaller, that is, the first disk plate 100A can be formed more compactly.

[0054] Also, as an example, among the first wall surfaces 124, the surface (first support surface) 130 facing the elastic mechanism portion 300 can be provided so as to surround the accommodation region 102A. Thereby, the first support surface 130 can support the first sheet member 330 and the second sheet member 332 from the radially outer side of the first disk plate 100A. According to such a configuration, compared with a configuration in which the first support surface 130 is arranged at a distance from the elastic mechanism portion 300, the diameter of the first disk plate 100A can be made smaller, that is, the first disk plate 100A can be formed more compactly.

[0055] Each first throttle portion 120 including such a first throttle portion 120A can be formed, for example, by performing press molding on the flat first main surface 140 of the first disk plate 100A.

[0056] (2B) Second throttle portion Referring to FIGS. 1 and 2, a total of four second throttle portions 150 (150A, 150B, 150C, 150D) can be formed on the second disk plate 100B here. The second throttle portions 150A, 150B, 150C, and 150D can be respectively arranged adjacent to the accommodation regions 102A, 102B, 102C, and 102D. In one example, each second throttle portion 150 can be arranged so as to be adjacent to the outer diameter side of the corresponding accommodation region 102. By adopting this configuration, in particular, compared with a configuration in which each second throttle portion 150 is arranged adjacent to the inner diameter side of the corresponding accommodation region 102, the diameter of the second disk plate 100B can be reduced, and thus the diameter of the disk plate 100 can be reduced.

[0057] Since each second throttle portion 150 can have the same shape as each other, here, focusing on the second throttle portion 150A, in addition to FIGS. 1 and 2, it will be described with reference to FIG. 6. FIG. 6 is a perspective view schematically showing an enlarged view of a part of the configuration of the damper device shown in FIG. 1 from a perspective different from FIG. 1.

[0058] The second throttle portion 150A can have a shape that is recessed in a direction (vertical direction in the drawing) approaching the corresponding first throttle portion 120 (here, the first throttle portion 120A) formed in the first disk plate 100A from the flat second main surface 170 of the second disk plate 100B. Note that the second main surface 170 can extend in a substantially annular shape, for example, in the second disk plate 100B.

[0059] Specifically, the second throttle portion 150A can include a second fixing surface 152 that extends substantially parallel to the second main surface 170, and a second wall surface 154 that surrounds the periphery of the first fixing surface 152 and continuously connects the second main surface 170 and the second fixing surface 152.

[0060] Substantially the entire second fixing surface 152 can be formed as a plane. The second fixing surface 152 can extend in an arc shape along the circumferential direction of the second disk plate 100B. The second fixing surface 152 can be fixed to the first throttle portion 120A formed in the first disk plate 100A using at least one (a total of three in FIGS. 1 and 2) fastening member (for example, a rivet) R.

[0061] The second wall surface 154 can be formed, for example, by a combination of a plane and a curved surface. Among the second wall surface 154, the surface (second contact surface) 156 facing the engaging portion 208A can function as a stopper that contacts the engaging portion 208A and restricts further rotation of the hub 200 in the clockwise direction with respect to the disk plate 100. Also, among the second wall surface 154, the surface (second contact surface) 158 facing the engaging portion 208D can function as a stopper that contacts the engaging portion 208D and restricts further rotation of the hub 200 in the counterclockwise direction with respect to the disk plate 100.

[0062] As an example, the second abutting surfaces 156 and 158 can be arranged on a circumference extending with the distance between the rotation center O of the damper device 10 and the fastening member R as the radius, that is, at a position overlapping the circumference. According to such a configuration, compared with a configuration in which the second abutting surfaces 156 and 158 are not on the circumference, that is, at a position not overlapping the circumference, the diameter of the second disk plate 100B can be made smaller, that is, the second disk plate 100B can be formed more compactly.

[0063] Also, as an example, among the second wall surfaces 154, the surface (second support surface) 160 facing the elastic mechanism portion 300 can be provided so as to surround the accommodation region 102A. Thereby, the second support surface 160 can support the first sheet member 330 and the second sheet member 332 from the radially outer side of the second disk plate 100B. According to such a configuration, compared with a configuration in which the second support surface 160 is arranged at a distance from the elastic mechanism portion 300, the diameter of the second disk plate 100B can be made smaller, that is, the second disk plate 100B can be formed more compactly.

[0064] Each second throttle portion 150 including such a second throttle portion 150A can be formed, for example, by performing press molding on the flat second main surface 170 of the second disk plate 100B.

[0065] 2. Operation of the damper device 10 Next, the operation of the damper device 10 having the above configuration will be described. FIGS. 1 to 6 show an initial state in which no driving force from a driving source such as an engine or a motor is transmitted to the damper device 10, or a state in which no phase difference occurs between the disk plate 100 and the hub 200.

[0066] Power from a driving source such as an engine or a motor can be transmitted in the order of the disk plate 100, the second sheet 332, the elastic body 310, the first sheet 330, and the hub 200. Focusing on the accommodation region 102A, the power is first transmitted from the second end face 104A2 (104B2) of the disk plate 100 to the second sheet 332. The second sheet 332 transmits such power to the first sheet 330 while deflecting the elastic body 310. The first sheet 330 can transmit such power to the hub 200 via the notch 206A1 of the hub 200.

[0067] Similarly, for the accommodation region 102B, it can be transmitted from the second end face 106A2 (106B2) of the disk plate 100 to the notch 206B1 of the hub 200 via the elastic mechanism portion 300 disposed in the accommodation region 102B.

[0068] Similarly, for the accommodation region 102C, it can be transmitted from the second end face 108A2 (108B2) of the disk plate 100 to the notch 206C1 of the hub 200 via the elastic mechanism portion 300 disposed in the accommodation region 102C.

[0069] Similarly, for the accommodation region 102D, it can be transmitted from the second end face 110A2 (110B2) of the disk plate 100 to the notch 206D1 of the hub 200 via the elastic mechanism portion 300 disposed in the accommodation region 102D.

[0070] On one hand, when the torque transmitted to the disk plate 100 is positive (for example, in the case of acceleration), although not shown in FIGS. 1 to 6, the disk plate 100 can rotate counterclockwise relative to the hub 200 on the paper surface. As a result, the second sheet 332 is pressed toward the first sheet 330 by the second end face 104A2 (104B2), and thus moves away from the notch 206D2 of the hub 200 and approaches the first sheet 330 against the elastic body 310. Since the hub 200 is relatively stationary, the first sheet 330 supported by the notch 206A1 of the hub 200 does not slide. Therefore, the elastic body 310 contracts, and the first end face 104A1 (104B1) of the disk plate 100 releases the support for the first sheet 330 and separates from the first sheet 330.

[0071] After that, as the elastic body 310 expands to return to its original shape, the first sheet 330 biased by the elastic body 310 presses the notch 206A1 of the hub 200 in the counterclockwise direction on the paper surface. As a result, the hub 200 rotates counterclockwise, and thus the input shaft of the transmission (not shown) rotates.

[0072] Such an operation is similarly performed for the elastic mechanism portions 300 disposed in each of the accommodation regions 102B, 102C, and 102D.

[0073] Here, consider the case where the disk plate 100 rotates counterclockwise by a predetermined angle relative to the hub 200 on the paper surface, that is, the case where the hub 200 rotates clockwise by a predetermined angle relative to the disk plate 100 on the paper surface. In this case, the first contact surface 126 of each first throttle portion 120 and the second contact surface 156 of each second throttle portion 150 formed on the disk plate 100 come into contact with the engaging portion 208 formed on the hub 200.

[0074] For example, the first contact surface 126 of the first throttle portion 120A and the second contact surface 156 of the second throttle portion 150A provided in association with the accommodation region 102A abut against the engaging portion 208A formed on the hub 200. Similarly, the first contact surface 126 of the first throttle portion 120A and the second contact surface 156 of the second throttle portion 150A provided in association with the accommodation region 102B abut against the engaging portion 208B formed on the hub 200. Further similarly, the first contact surface 126 of the first throttle portion 120A and the second contact surface 156 of the second throttle portion 150A provided in association with the accommodation region 102C (102D) abut against the engaging portion 208C (208D) formed on the hub 200.

[0075] Thereby, the first contact surface 126 of each first throttle portion 120 and the second contact surface 156 of each second throttle portion 150 cooperate with the corresponding engaging portion 208 formed on the hub 200 to restrict the disk plate 100 from further rotating counterclockwise on the paper surface with respect to the hub 200, that is, it is possible to restrict the hub 200 from further rotating clockwise on the paper surface with respect to the disk plate 100.

[0076] On the other hand, when the torque transmitted to the disk plate 100 is negative (for example, in a state during deceleration by engine braking), although not shown in FIGS. 1 to 6, the disk plate 100 can rotate relative to the hub 200 clockwise on the paper surface. Thereby, the first sheet 330 is pressed toward the second sheet 332 by the first end surface 104A1 (104B1), and thus moves away from the notch 206A1 of the hub 200 and approaches the second sheet 332 against the elastic body 310. Since the hub 200 is relatively stationary, the second sheet 332 supported by the notch 206D2 of the hub 200 does not slide. Therefore, the elastic body 310 contracts, and the second end surface 104A2 (104B2) of the disk plate 100 releases the support for the second sheet 332 and separates from the second sheet 332.

[0077] Thereafter, as the elastic body 310 stretches to return to its original shape, the second sheet 332 biased by the elastic body 310 presses against the notch 206D2 of the hub 200 in the clockwise direction on the paper surface. As a result, the hub 200 rotating counterclockwise decelerates, and consequently, the input shaft of a transmission (not shown) decelerates.

[0078] Such an operation is similarly performed for the elastic mechanism portions 300 disposed in each of the accommodation regions 102B, 102C, and 102D.

[0079] Here, consider the case where the disk plate 100 rotates a predetermined angle clockwise on the paper surface with respect to the hub 200, that is, the case where the hub 200 rotates a predetermined angle counterclockwise on the paper surface with respect to the disk plate 100. In this case, the first contact surfaces 128 of the respective first throttle portions 120 and the second contact surfaces 158 of the respective second throttle portions 150 formed on the disk plate 100 come into contact with the engaging portion 208 formed on the hub 200.

[0080] For example, the first contact surface 128 of the first throttle portion 120A and the second contact surface 158 of the second throttle portion 150A provided in association with the accommodation region 102A come into contact with the engaging portion 208D formed on the hub 200. Similarly, the first contact surface 128 of the first throttle portion 120A and the second contact surface 158 of the second throttle portion 150A provided in association with the accommodation region 102B come into contact with the engaging portion 208A formed on the hub 200. Further similarly, the first contact surface 128 of the first throttle portion 120A and the second contact surface 158 of the second throttle portion 150A provided in association with the accommodation region 102C (102D) come into contact with the engaging portion 208B (208C) formed on the hub 200.

[0081] Thereby, the first contact surfaces 128 of the respective first throttle portions 120 and the second contact surfaces 158 of the respective second throttle portions 150 cooperate with the corresponding engaging portions 208 formed on the hub 200 to restrict the disk plate 100 from further rotating clockwise on the paper surface with respect to the hub 200, that is, to restrict the hub 200 from further rotating counterclockwise on the paper surface with respect to the disk plate 100.

[0082] 3. Modification example 3-1. Regarding the ribs provided on the throttle portion At least one of the throttle portions (the first throttle portion 120 and / or the second throttle portion 150) described above can include ribs extending in the circumferential direction of the disk plate 100. The throttle portion including such ribs disperses the load or stress received from the engaging portion 208 of the hub 200 that abuts against this throttle portion in the circumferential direction of the disk plate 100, thereby preventing the phenomenon of the rivet R loosening and / or the phenomenon of one of the first disk plate 100A and the second disk plate 100B peeling off from the other.

[0083] FIG. 7A is an enlarged perspective view schematically showing a partial configuration of the damper device shown in FIG. 3 in which ribs are provided on the first throttle portion 120. As illustrated in FIG. 7A, the first throttle portion 120 can include a first rib 180 that is adjacent to at least one of the two first contact surfaces 126, 128 (the first contact surface 128 in FIG. 7A) and extends along the circumferential direction of the first disk plate 100A.

[0084] The first rib 180 can include a base surface 182 extending from the first fixing surface 122 of the first throttle portion 120, and a third wall surface 184 that surrounds the periphery of the base surface 182 and continuously connects the base surface 182 and the first main surface 140 of the first disk plate 100A.

[0085] The third wall surface 184 can be formed, for example, by a combination of a flat surface and a curved surface.

[0086] The base surface 182 can extend in an arc shape along the circumferential direction of the first disk plate 100A. In one example, substantially the entire base surface 182 can be formed as a flat surface. In another example, the base surface 182 can be formed by a combination of a flat surface and a curved surface.

[0087] In the first example, substantially the entire base surface 182 can extend substantially parallel to both the first fixing surface 122 and the first main surface 140 of the first disk plate 100A.

[0088] In the second example, as illustrated in FIG. 7A, the base surface 182 can be inclined so as to connect the first fixed surface 122 and the first main surface 140. That is, it can be said that the base surface 182 can include at least one point (inflection point) where the inclination angle changes.

[0089] In the first example described above, the load or stress applied to the first constriction portion 120 by the engaging portion 208 of the hub 200 may propagate to the base of the tip portion (the portion farthest from the first fixed surface 122) of the first rib 180 without a significant decrease. On the other hand, in the second example, since the base surface 182 is inclined in a direction approaching the first main surface 140 of the first disk plate 100A, the load or stress applied to the first constriction portion 120 by the engaging portion 208 of the hub 200 is more likely to be dispersed and propagated to the first main surface 140 before propagating to the base of the tip portion (the portion farthest from the first fixed surface 122) of the first rib 180. As a result, the load or stress propagating to the base of the tip portion can be smaller than in the first example.

[0090] Such a second example is advantageous in the following respects. In the vicinity of an intermediate position between one rivet R and an adjacent rivet R, for example, in the vicinity of an intermediate position of an arc connecting one first constriction portion 120 and another adjacent first constriction portion 120 in FIG. 4 (in the vicinity of an intermediate position of an arc connecting one second constriction portion 150 and another adjacent second constriction portion 150 in FIG. 2), the force for connecting and fixing the first disk plate 100A and the second disk plate 100B is weakest. In the case of the first example, compared to the second example to the fullest extent, a relatively large load or stress propagates to the base of the tip of the first rib 180 (the portion farthest from the first fixing surface 122), and thus to the vicinity of the above intermediate position, which may contribute to the force for separating the first disk plate 100A and the second disk plate 100B. In contrast, in the case of the second example, compared to the first example, only a relatively small load or stress propagates to the base of the tip of the first rib 180 (the portion farthest from the first fixing surface 122), and thus to the vicinity of the above intermediate position. Thereby, the first disk plate 100A and the second disk plate 100B can be continuously connected more firmly.

[0091] Although not shown in FIG. 7A, the first constriction portion 120 may include a first rib 180 extending adjacent to the first contact surface 126 instead of, or in addition to, the first rib 180 extending adjacent to the first contact surface 128. The first rib 180 extending adjacent to the first contact surface 126 may have a configuration similar to that of the first rib 180 extending adjacent to the first contact surface 128 described above.

[0092] The first constriction portion 120 including such a first rib 180 can also be formed, for example, by performing press molding on the flat first main surface 140 of the first disk plate 100A, in the same manner as the first constriction portion 120 described above with reference to FIGS. 1 to 6.

[0093] Also, although not shown in FIG. 7A, the second throttle portion 150 may include a second rib that is adjacent to at least one of the two second abutting surfaces 156 and 158 and extends along the circumferential direction of the second disk plate 100B. Such a second rib can have the same configuration as the first rib 180 described above. For example, the second rib can include a base surface extending from the second fixing surface 152 of the second throttle portion 150, and a fourth wall surface surrounding the periphery of the base surface and continuously connecting the base surface and the second main surface 170 of the second disk plate 100B. The base surface and the fourth wall surface included in the second rib can each have the same configuration as the base surface 182 and the third wall surface 184 included in the first rib 180.

[0094] The second throttle portion 150 including such a second rib can also be formed, for example, by performing press molding on the flat second main surface 170 of the second disk plate 100B in the same manner as the second throttle portion 150 described above with reference to FIGS. 1 to 6.

[0095] Next, experimental data regarding a damper device provided with a throttle portion including such first and second ribs will be briefly described.

[0096] FIG. 7B is a diagram schematically showing the distribution of stress applied to the first throttle portion 120 and its periphery when the engaging portion 208 of the hub 200 abuts on the first throttle portion 120 in the damper device shown in FIG. 7A. FIG. 7C is a diagram schematically showing the amount of displacement in the axial direction that occurs between the first disk plate 100A and the second disk plate B when each engaging portion 208 of the hub 200 abuts on the corresponding first throttle portion and each second throttle portion in a damper device including each first throttle portion 120 having the first ribs shown in FIG. 7A at both ends and each second throttle portion 150 (each second throttle portion 150 lacking the second ribs) shown in FIG. 2. Here, FIG. 7C is premised on a damper device in which each engaging portion 208 of the hub 200 abuts on both the first throttle portion and the second throttle portion as an example. However, the damper device disclosed in the present application may adopt a configuration in which at least one engaging portion 208 abuts on at least one of the first throttle portion and the second throttle portion (that is, a configuration in which at least one engaging portion 208 abuts on only the first throttle portion, only the second throttle portion, or both the first throttle portion and the second throttle portion).

[0097] FIG. 8A is a perspective view schematically showing an enlarged part of the configuration in the damper device shown in FIGS. 1 to 6 as a comparative example for the damper device shown in FIG. 7A. FIG. 8B is a diagram schematically showing the distribution of stress applied to the first throttle portion 120 and its periphery when the engaging portion 208 of the hub 200 abuts on the first throttle portion 120 in the damper device shown in FIG. 8A. FIG. 8C is a diagram schematically showing the amount of displacement in the axial direction that occurs between the first disk plate 100A and the second disk plate B when each engaging portion 208 of the hub 200 abuts on the corresponding first throttle portion and each second throttle portion in the damper device shown in FIGS. 1 to 6. Here, FIG. 8C is premised on a damper device in which each engaging portion 208 of the hub 200 abuts on both the first throttle portion and the second throttle portion as an example. However, the damper device disclosed in the present application may adopt the above-described configuration in which at least one engaging portion 208 abuts on at least one of the first throttle portion and the second throttle portion (that is, a configuration in which at least one engaging portion 208 abuts on only the first throttle portion, only the second throttle portion, or both the first throttle portion and the second throttle portion).

[0098] Focusing on FIGS. 7B and 8B showing the stress distribution, it shows that the higher the density of the hatched area, the greater the stress applied to that area, and the lower the density of the hatched area, the smaller the stress applied to that area.

[0099] As is clear from comparing FIG. 7B and FIG. 8B, according to FIG. 8B, in a partial region 500 of the first wall surface 124 adjacent to the first contact surface 128, a large stress (specifically, a stress of about several hundred MPa) is generated. On the other hand, according to FIG. 7B, such a large stress is not generated not only in the same region 500 but also in other regions. Instead, it is understood that the stress is generated dispersively in the circumferential direction along the first rib 180. Thus, compared with FIG. 8B, in the case of FIG. 7B, the phenomenon in which a large stress (for example, a stress of about several hundred MPa) is concentrated in a specific region is suppressed by providing the first rib 180.

[0100] Also, focusing on FIGS. 7C and 8C showing the amount of displacement in the axial direction generated between the first disk plate 100A and the second disk plate B (that is, the amount of the distance by which one disk plate is peeled off from the other disk plate), it shows that the higher the density of the hatched area, the greater the amount of displacement generated in that area, and the lower the density of the hatched area, the smaller the amount of displacement related to that area.

[0101] As is clear from comparing FIG. 7C and FIG. 8C, it is understood that the amount of displacement in the vicinity of the intermediate position between one rivet R and the adjacent rivet R, that is, in the vicinity of the intermediate position of the arc connecting one first throttle portion 120 and another adjacent first throttle portion 120, is approximately halved in the case of FIG. 7C compared with FIG. 8C. Thus, compared with FIG. 8C, in the case of FIG. 7C, the first disk plate 100A and the second disk plate 100B are less likely to be peeled off by providing the first rib 180.

[0102] Note that, as described above, FIG. 7C shows the amount of displacement in the axial direction that occurs between the first disk plate 100A and the second disk plate 100B in a damper device including each first throttle portion 120 having the first ribs illustrated in FIG. 7A at both ends and each second throttle portion 150 (i.e., each second throttle portion 150 lacking the second ribs) illustrated in FIG. 2. However, even in a damper device including each first throttle portion 120 lacking the first ribs and each second throttle portion 150 having the second ribs with the same configuration as the first ribs illustrated in FIG. 7A at both ends, an effect equivalent to that shown in FIG. 7C can be obtained. Furthermore, even in a damper device including each first throttle portion 120 having the first ribs illustrated in FIG. 7A at both ends and each second throttle portion 150 having the second ribs at both ends, an effect equal to or greater than that shown in FIG. 7C can be obtained.

[0103] 3-2. Regarding the inclination angles of the first contact surface and the second contact surface in the throttle portion Referring to FIG. 4, in the first example, each of the first contact surfaces 126 and 128 of the first throttle portion 120 may be formed to extend parallel to a line connecting this first contact surface and the rotation center O of the damper device 10. In this case, the engaging portion 208 of the hub 200 can be formed to extend parallel to such a first contact surface (so as to be in surface contact with the first contact surface). This is similarly applicable to each of the second contact surfaces 156 and 158 of the second throttle portion 150 shown in FIG. 6 and the like.

[0104] Referring to FIG. 4, in the second example, each of the first contact surfaces 126 and 128 of the first throttle portion 120 may be formed to be inclined at an arbitrary angle with respect to a virtual line connecting this first contact surface and the rotation center O of the damper device 10. Thereby, by reducing the stress generated at the root portion of the engaging portion 208 of the hub 200 that abuts against such a first contact surface, the phenomenon in which the engaging portion 208 breaks at the root portion can be suppressed.

[0105] Also in this case, the engaging portion 208 of the hub 200 can be formed to extend parallel to such a first contact surface (so as to be in surface contact with the first contact surface). This is similarly applicable to each of the second contact surfaces 156 and 158 of the second throttle portion 150 shown in FIG. 6 and the like.

[0106] 3-3. Others In the various examples described above, the case where at least one first throttle portion 120 is provided in the first disk plate 100A and the second throttle portion 150 is provided at a position corresponding to each first throttle portion 120 in the second disk plate 100B has been described.

[0107] However, in another example, it is also possible to adopt a configuration in which at least one first throttle portion 120 is provided only in the first disk plate 100A and the second throttle portion 150 is not provided in the second disk plate 100B. In this case, the first fixing portion 122 of the first throttle portion 120 can be fixed to the second main surface 170 of the second disk plate 100B by a fastening member (for example, a rivet R).

[0108] Furthermore, in yet another example, it is also possible to adopt a configuration in which at least one second throttle portion 150 is provided only in the second disk plate 100B and the first throttle portion 120 is not provided in the first disk plate 100A. In this case, the second fixing portion 152 of the second throttle portion 150 can be fixed to the first main surface 140 of the first disk plate 100A by a fastening member (for example, a rivet R).

[0109] Furthermore, the damper device disclosed in the present application is based on the premise that at least one first throttle portion 120 is provided in the first disk plate 100A and the second throttle portion 150 is provided at a position corresponding to each first throttle portion 120 in the second disk plate 100B. It is also possible to adopt a configuration in which a stopper is provided on at least one of the first throttle portion 120 and the second throttle portion 150 (that is, only the first throttle portion 120, only the second throttle portion 150, or both the first throttle portion 120 and the second throttle portion 150).

[0110] Here, providing a stopper to the first throttle portion 120 means providing first contact surfaces 126 and 128 that face the engaging portion 208 of the hub 200 and contact this engaging portion 208 on at least one first throttle portion 120. Also, providing a stopper to the second throttle portion 150 means providing second contact surfaces 156 and 158 that face the engaging portion 208 of the hub 200 and contact this engaging portion 208 on at least one second throttle portion 150.

[0111] In the above-described embodiment, the case where the hub 200 has a shape as illustrated in FIG. 4 has been described. However, the technology disclosed in the present application is applicable also when using a hub having an arbitrary shape as long as it has a basic configuration including an elastic mechanism portion disposed between it and a disk plate or the like along the circumferential direction, which expands or contracts to rotate relative to the disk plate or the like around the rotation axis and includes an engaging portion protruding radially outward at the outer peripheral edge.

[0112] Another example of such a hub is shown in FIGS. 9 and 10. FIG. 9 is a perspective view schematically showing the configuration of another hub used in the damper device shown in FIG. 1. FIG. 10 is a top view schematically showing the configuration of the hub shown in FIG. 9.

[0113] Hereinafter, the configuration of the hub 200Y illustrated in FIGS. 9 and 10 will be described focusing only on the points different from the configuration of the above-described hub 200.

[0114] Referring to FIGS. 9 and 10, the hub 800 can include four openings 802 (openings 802A, 802B, 802C, 802D) corresponding to the accommodation regions 102A, 102B, 102C, 102D formed in the disk plate 100, respectively. In each opening 802, the above-described set of elastic mechanism portions 300 is accommodated.

[0115] The radially outer side of each opening 802 is not formed as an open end as in the hub 200 illustrated in FIG. 3. An outer peripheral portion 804 that is continuous along the circumferential direction extends radially outside each opening 802.

[0116] Furthermore, the hub 800 can include engaging portions 808 (engaging portions 808A, 808B, 808C, 808D) at the outer peripheral portion 804 that extends radially outside each opening 802. Each engaging portion 808 protrudes radially outward.

[0117] Note that the hub 800 shown in FIGS. 9 and 10 is sometimes referred to as a "bridge type" hub.

[0118] Referring to FIG. 10, for example, on the arc connecting the engaging portion 808B and the engaging portion 808C, the first contact surfaces 126, 128 (see FIG. 4) of the first throttling portion 120C and / or the second contact surfaces 156, 158 (see FIG. 2) of the second throttling portion 150C may be located. Thereby, when the hub 800 rotates a predetermined angle counterclockwise on the paper surface with respect to the disk plate 100, the engaging portion 808B can contact the first contact surface 128 and / or the second contact surface 158. Conversely, when the hub 800 rotates a predetermined angle clockwise on the paper surface with respect to the disk plate 100, the engaging portion 808C can contact the first contact surface 126 and / or the second contact surface 156. Note that in FIG. 10, the first throttling portion 120C and / or the second throttling portion 150C are described as having a rectangular shape for simplicity, but actually have the configuration as described above with reference to FIG. 4 and the like.

[0119] In FIG. 10, although illustration is omitted, on the arc connecting the engaging portion 808C and the engaging portion 808D, the first abutting surfaces 126 and 128 (see FIG. 4) of the first restricting portion 120D, and / or the second abutting surfaces 156 and 158 (see FIG. 2) of the second restricting portion 150D may be located. Similarly, on the arc connecting the engaging portion 808D and the engaging portion 808A, the first abutting surfaces 126 and 128 (see FIG. 4) of the first restricting portion 120A, and / or the second abutting surfaces 156 and 158 (see FIG. 2) of the second restricting portion 150A may be located. Further similarly, on the arc connecting the engaging portion 808A and the engaging portion 808B, the first abutting surfaces 126 and 128 (see FIG. 4) of the first restricting portion 120B, and / or the second abutting surfaces 156 and 158 (see FIG. 2) of the second restricting portion 150B may be located.

[0120] When such a hub 800 is adopted, compared with the case of adopting the above-described hub 200, the degree of freedom regarding the arrangement of the elastic mechanism portion 300 and the stoppers (the first abutting surfaces 126 and 128 of the first restricting portion 120 and / or the second abutting surfaces 156 and 158 of the second restricting portion 150) can be improved.

[0121] Also, as can be easily understood by those skilled in the art having the benefits of the present disclosure, the various examples described above can be appropriately combined and used in various patterns with each other as long as no contradiction occurs.

[0122] As described above, according to the technology disclosed in the present application, at least one restricting portion having a shape recessed toward the other plate in at least one of the first disk plate and the second disk plate constituting the disk plate (the first rotating body) is formed so as to face an engaging portion protruding radially outward at the outer peripheral edge of the hub (the second rotating body). This restricting portion functions as a "stopper" that abuts against the engaging portion of the hub and prevents the hub from rotating relative to the disk plate by a predetermined angle or more.

[0123] In this throttle portion, the contact surface that abuts against the engaging portion is formed by the wall surface of the plate rather than the cross-section of the plate (thereby increasing the contact area with the engaging portion), so that the value of the stress (surface pressure) received per unit area from the engaging portion can be reduced. As a result, the contact surface of the throttle portion can maintain higher strength.

[0124] Also, the contact surface of this throttle portion is formed by the disk plate itself rather than a soft material such as a bendable rivet, so that the possibility of deformation due to contact with the engaging portion can be reduced.

[0125] Furthermore, the fastening member (such as a rivet) for connecting the first disk plate and the second disk plate constituting the disk plate does not directly contact the engaging portion. Therefore, it is possible to avoid the phenomenon that the fastening member loosens or deforms due to contact with the engaging portion.

[0126] Thus, according to the technology disclosed in the present application, it is possible to provide a damper device provided with a stopper having improved performance.

[0127] 4. Various aspects The damper device according to the first aspect includes "a first plate to which power is transmitted from a flywheel and which rotates around a rotating shaft, and a second plate that is disposed opposite to the first plate with a distance therebetween and that rotates integrally with the first plate around the rotating shaft, a first rotating body including the second plate, and an elastic mechanism portion disposed between the first rotating body along the circumferential direction, which expands or contracts to rotate relative to the first rotating body around the rotating shaft, and a second rotating body including an engaging portion that protrudes radially outward at the outer peripheral edge. The first plate includes a first throttling portion that is recessed from the first main surface of the first plate in a direction approaching the second plate, and the second plate is provided opposite to the first throttling portion, is recessed from the second main surface of the second plate in a direction approaching the first throttling portion, and includes a second throttling portion fixed to the first throttling portion using a fastening member. The first throttling portion and / or the second throttling portion abuts against the engaging portion of the second rotating body that is in a state of rotating relative to the first rotating body, and restricts further rotation of the second rotating body in a direction to contract the elastic mechanism portion."

[0128] The damper device according to the second aspect, in the first aspect, "the first throttling portion extends substantially parallel to the first main surface of the first plate, and includes a first fixing surface fixed to the second throttling portion using the fastening member, and a first wall surface surrounding the first fixing surface and connecting the first main surface and the first fixing surface. A first contact surface of the first wall surface facing the engaging portion abuts against the engaging portion and restricts rotation of the second rotating body in a direction to contract the elastic mechanism portion."

[0129] The damper device according to the third aspect, in the first aspect, "the second throttling portion extends substantially parallel to the second main surface of the second plate, and includes a second fixing surface fixed to the first throttling portion by the fastening member, and a second wall surface surrounding the second fixing surface and connecting the second main surface and the second fixing surface. A second contact surface of the second wall surface facing the engaging portion abuts against the engaging portion and restricts rotation of the second rotating body in a direction to contract the elastic mechanism portion."

[0130] In the damper device according to the fourth aspect, in the above-described second aspect or the above-described third aspect, "when assuming the second aspect, the first contact surface is disposed on a circumference extending with a radius being the distance between the rotation center of the damper device and the fastening member, and when assuming the third aspect, the second contact surface is disposed on a circumference extending with a radius being the distance between the rotation center of the damper device and the fastening member", this configuration can be adopted.

[0131] In the damper device according to the fifth aspect, in the above-described second aspect or the above-described third aspect, "the elastic mechanism portion includes an elastic member, a first sheet member provided in contact with one end of the elastic member, and a second sheet member provided in contact with the other end of the elastic member. When assuming the second aspect, the first support surface of the first wall surface facing the elastic mechanism portion supports the first sheet member and the second sheet member. When assuming the third aspect, the second support surface of the second wall surface facing the elastic mechanism portion supports the first sheet member and the second sheet member", this configuration can be adopted.

[0132] In the damper device according to the sixth aspect, in the above-described second aspect or the above-described third aspect, "when assuming the second aspect, the first throttle portion includes a first rib adjacent to the first contact surface and extending along the circumferential direction of the first plate. When assuming the third aspect, the second throttle portion includes a second rib adjacent to the second contact surface and extending along the circumferential direction of the second plate", this configuration can be adopted.

[0133] In the damper device according to the seventh aspect, in the above-described sixth aspect, "the first rib is inclined so as to connect the first fixed surface and the first main surface of the first plate, and the second rib is inclined so as to connect the second fixed surface and the second main surface of the second plate", this configuration can be adopted.

Explanation of Reference Numerals

[0134] O Rotation axis (rotation center) R fastening member (rivet, etc.) 10 damper device 100 disk plate (first rotating body) 100A first disk plate (first plate) 120, 120A, 120B, 120C, 120D first throttle part 122 first fixing surface 124 first wall surface 126, 128 first contact surface 130 first support surface 140 first main surface 100B second disk plate (second plate) 150, 150A, 150B, 150C, 150D second throttle part 152 second fixing surface 154 second wall surface 156, 158 second contact surface 160 second support surface 170 second main surface 180 first rib 200 hub (second rotating body) 208, 208A, 208B, 208C, 208D engaging part 300 elastic mechanism part 310 elastic body (elastic member) 330 first sheet member 332 second sheet member

Claims

1. A first rotating body including a first plate to which power is transmitted from a flywheel and that rotates around a rotating shaft, and a second plate that is disposed opposite to the first plate with a distance therebetween and that rotates integrally with the first plate around the rotating shaft. A second rotating body that extends or contracts an elastic mechanism portion disposed between the second rotating body and the first rotating body along the circumferential direction, rotates relative to the first rotating body around the rotating shaft, and includes an engaging portion that protrudes radially outward at an outer peripheral edge. Comprising: The first plate includes a first throttling portion that is recessed in a direction approaching the second plate from a first main surface of the first plate. The second plate includes a second throttling portion that is provided opposite to the first throttling portion, is recessed in a direction approaching the first throttling portion from a second main surface of the second plate, and is fixed to the first throttling portion using a fastening member. The first throttling portion and / or the second throttling portion abuts against the engaging portion of the second rotating body that is in a state of rotating relative to the first rotating body, and restricts further rotation of the second rotating body in a direction to contract the elastic mechanism portion, where The first throttling portion includes a first fixing surface that extends substantially parallel to the first main surface of the first plate and is fixed to the second throttling portion using the fastening member, and a first wall surface that connects the first main surface and the first fixing surface. A first contact surface of the first wall surface that faces the engaging portion abuts against the engaging portion and restricts rotation of the second rotating body in a direction to contract the elastic mechanism portion. The first throttling portion includes a first rib that is adjacent to the first contact surface and extends along the circumferential direction of the first plate. A damper device characterized by this.

2. A first plate to which power is transmitted from a flywheel and that rotates around a rotating shaft, and a second plate that is disposed opposite to the first plate with a distance therebetween and that rotates integrally with the first plate around the rotating shaft, a first rotating body including the second plate. A second rotating body that extends or contracts an elastic mechanism portion disposed between the second rotating body and the first rotating body along the circumferential direction, rotates relative to the first rotating body around the rotating shaft, and includes an engaging portion that protrudes radially outward at an outer peripheral edge. Comprising: The first plate includes a first throttling portion that is recessed in a direction approaching the second plate from a first main surface of the first plate. The second plate is provided opposite to the first throttle portion, is recessed from the second main surface of the second plate in a direction approaching the first throttle portion, and includes a second throttle portion fixed to the first throttle portion using a fastening member. The first throttle portion and / or the second throttle portion abuts against the engaging portion of the second rotating body that is in a state of rotating relative to the first rotating body, restricting further rotation of the second rotating body in a direction of reducing the elastic mechanism portion. Here, The second throttle portion extends substantially parallel to the second main surface of the second plate and includes a second fixing surface fixed to the first throttle portion by the fastening member, and a second wall surface connecting the second main surface and the second fixing surface. A second contact surface of the second wall surface facing the engaging portion abuts against the engaging portion, restricting rotation of the second rotating body in a direction of reducing the elastic mechanism portion. The second throttle portion includes a second rib adjacent to the second contact surface and extending along the circumferential direction of the second plate. The damper device is characterized by this.

3. When citing Claim 1, the first wall surface surrounds the first fixing surface. When citing Claim 2, the second wall surface surrounds the second fixing surface. The damper device according to Claim 1 or Claim 2.

4. When citing Claim 1, the first contact surface is arranged on a circumference extending with the distance between the rotation center of the damper device and the fastening member as the radius. When citing Claim 2, the second contact surface is arranged on a circumference extending with the distance between the rotation center of the damper device and the fastening member as the radius. The damper device according to Claim 1 or Claim 2.

5. The elastic mechanism portion includes an elastic member, a first sheet member provided in contact with one end of the elastic member, and a second sheet member provided in contact with the other end of the elastic member. When citing Claim 1, a first support surface of the first wall surface facing the elastic mechanism portion supports the first sheet member and the second sheet member. When citing Claim 2, a second support surface of the second wall surface facing the elastic mechanism portion supports the first sheet member and the second sheet member. The damper device according to Claim 1 or Claim 2.

6. When citing Claim 1, the first rib is inclined so as to connect the first fixing surface and the first main surface of the first plate. When citing claim 2, the damper device according to claim 1 or claim 2, wherein the second rib is inclined so as to connect the second fixing surface and the second main surface of the second plate.

Images