Damper device

Abstract

To provide a damper device which is compact in axial length and can stably generate hysteresis torque having a variety of variations.SOLUTION: A damper device (1) has a first rotating body (100) rotating around a rotating axis (O), a second rotating body (200) relatively rotating with respect to the first rotating body, an elastic mechanism part (400), a radial-direction extension part (302) abutting on the elastic mechanism part (400), and an axial-direction extension part (303) which is at least partially accommodated in either of the first rotating body and the second rotating body. The damper device also comprises a control plate (300) arranged at only either of a first accommodation space (100) and a second accommodation space (100y) in an axial direction, a first slide part for generating first slide torque, and a second slide part for generating second slide torque. When the first rotating body and the second rotating body are relatively rotated, the damper device generates the first slide torque and the second slide torque.SELECTED DRAWING: Figure 4

Description

Technical Field

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

Background Art

[0002] In vehicles and 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, and the damper device is incorporated in, for example, a clutch device.

[0003] As a general configuration of a damper device, a technique is known in which a coil spring is interposed between a disk plate as an input member and a hub as an output member that are relatively rotatable with respect to each other, and the elastic deformation of the coil spring is utilized to absorb and attenuate torque fluctuations. Further, in addition to the elastic deformation of the coil spring, a technique is known in which a sliding torque (hysteresis torque) based on the relative rotation between the disk plate and the hub is generated to further absorb the torque fluctuations.

[0004] For example, Patent Document 1 discloses a damper device having main components such as a first rotating member (reference numeral 1 in Patent Document 1) as an input side of power transmission, a second rotating member (reference numeral 2 in Patent Document 1) as an output side of power transmission, two control plates (reference numerals 31 and 32 in Patent Document 1), a first sliding member (reference numerals 6 and 7 in Patent Document 1) that generates a first sliding torque, a second sliding member (reference numerals 8 and 9 in Patent Document 1) that generates a second sliding torque larger than the first sliding torque, and an elastic member 57 such as a cone spring.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the damper device described in Patent Document 1, since two control plates are accommodated between the first rotating member and the second rotating member in the axial direction, the number of components is large and the axial length of the damper device becomes large, which poses a problem in mounting on a vehicle or the like.

[0007] Therefore, according to various embodiments, a damper device with a compact axial length is provided. Also provided is a damper device capable of stably generating hysteresis torques of various variations.

Means for Solving the Problems

[0008] A damper device according to one aspect includes a first rotating body having at least a first plate that rotates around a rotation axis and a second plate that is disposed opposite to the first plate and rotates integrally with the first plate around the rotation axis, a second rotating body that rotates relative to the first rotating body around the rotation axis, an elastic mechanism portion that elastically connects the first rotating body and the second rotating body in the rotation direction, a radially extending portion that extends in the radial direction and abuts against the elastic mechanism portion, and an axially extending portion that extends in the axial direction and is at least partially accommodated in either one of the first rotating body and the second rotating body. In the axial direction, a control plate disposed only in either one of a first accommodation space between the first plate and the second rotating body and a second accommodation space between the second plate and the second rotating body, a first sliding portion disposed between the first rotating body and the control plate and sliding against at least one of the first rotating body and the control plate to generate a first sliding torque, and a second sliding portion disposed between the second rotating body and the control plate and sliding against at least one of the second rotating body and the control plate to generate a second sliding torque. When the first rotating body and the second rotating body rotate relative to each other, the first sliding torque and the second sliding torque are generated.

[0009] According to this configuration, by using a single control plate, the number of components can be reduced, and it becomes possible to provide a damper device with a compact axial length.

[0010] Further, in the damper device according to one aspect, one of the first sliding torque and the second sliding torque is a larger torque than the other, and is generated only when the first rotating body and the second rotating body rotate relative to each other in a predetermined direction.

[0011] With this configuration, the damper device according to one aspect always generates a small hysteresis torque (the smaller torque of the first sliding torque and the second sliding torque) when the first rotating body and the second rotating body rotate relative to each other, and in a special case where the first rotating body and the second rotating body rotate relative to each other in a predetermined direction, a large hysteresis torque (the larger torque of the first sliding torque and the second sliding torque) can be generated. At this time, by setting the first sliding torque or the second sliding torque that occurs only in this special case to be larger than the other, it is also possible to further increase the magnitude of the "large hysteresis torque". Thus, the damper device according to one aspect can generate various variations of hysteresis torque. Note that the aforementioned "large hysteresis torque" can be used, for example, to suppress relatively large vibrations and noises that occur when starting the engine of a vehicle or the like (especially a hybrid vehicle).

[0012] Further, in the damper device according to one aspect, the elastic mechanism portion includes a first elastic member and a pair of sheet members that sandwich and support the first elastic member from both sides, and the radially extending portion abuts against either the first elastic member or the pair of sheet members.

[0013] With this configuration, the radially extending portion can surely abut against the elastic mechanism portion, and as a result, the damper device according to one aspect can efficiently generate the first sliding torque and the second sliding torque.

[0014] Further, in the damper device according to one aspect, the first sliding portion includes a first sliding surface that slides with respect to the first rotating body or the radially extending portion, and a second elastic member that biases the first sliding surface in a direction approaching the first rotating body or the radially extending portion.

[0015] With this configuration, the damper device according to one aspect can reliably and efficiently generate the first sliding torque.

[0016] Further, in the damper device according to one aspect, the second sliding portion includes a second sliding surface that slides with respect to the second rotating body or the radially extending portion, and a third elastic member that biases the second sliding surface in a direction approaching the second rotating body or the radially extending portion.

[0017] With this configuration, the damper device according to one aspect can reliably and efficiently generate the second sliding torque.

[0018] Further, in the damper device according to one aspect, the first sliding portion and the second sliding portion are integrally formed with the control plate and function as a part of the control plate, and the radially extending portion slides directly with respect to the first rotating body and directly with respect to the second rotating body.

[0019] With this configuration, the damper device according to one aspect can further reduce the number of components by making the control plate, the first sliding portion, and the second sliding portion into an integral body.

[0020] Further, in the damper device according to one aspect, a thrust member having at least one of a first surface that slides with respect to the first rotating body and a second surface that slides with respect to the second rotating body is further provided in a space on a side different from the space in which the control plate is disposed among the first accommodation space and the second accommodation space.

[0021] By adopting this configuration, the damper device according to one aspect can additionally generate a hysteresis torque based on the first surface and the second surface.

[0022] Further, in the damper device according to one aspect, the thrust member has a fourth elastic member that biases the second surface in a direction approaching the second rotating body.

[0023] By adopting this configuration, the damper device according to one aspect can reliably and efficiently generate the aforementioned additional hysteresis torque.

Advantages of the Invention

[0024] According to various embodiments, it is possible to provide a damper device with a compact axial length. Further, it is also possible to provide a damper device capable of stably generating various variations of hysteresis torque.

Brief Description of the Drawings

[0025]

Figure 1

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Embodiments for Carrying Out the Invention

[0026] Hereinafter, various embodiments will be described with reference to the accompanying drawings. Note that the same reference numerals are assigned to common constituent elements in the drawings. Also, it should be noted that the constituent elements shown in one drawing may be omitted in another drawing for the sake of convenience of explanation. Furthermore, note that the attached drawings are not necessarily drawn to an exact scale.

[0027] 1. Configuration of the damper device An overview of the overall configuration of the damper device according to one embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is a schematic top view schematically showing the configuration of the damper device 1 according to one embodiment. FIG. 2 is a schematic top view schematically showing a configuration in which the description of some constituent elements is omitted from the damper device 1 shown in FIG. 1. FIG. 3 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 shown in FIG. 1 as viewed from the X-X line. FIG. 4 is a schematic perspective view showing the configuration of the damper device 1 according to one embodiment disassembled into each constituent element. FIG. 5 is a schematic perspective view showing an enlarged view of the control plate 300 of the damper device 1 according to one embodiment. FIG. 6 is a schematic view schematically showing only the region surrounded by the dotted line in FIG. 2 in the damper device 1 according to one embodiment. Note that in FIG. 6, for the sake of convenience, the pair of sheet members 420 in the elastic mechanism portion 400 described later are not shown, and also note that the contact relationship of each constituent element (for example, the elastic mechanism portion 400 and the disk plate 100, the elastic mechanism portion 400 and the hub 200) is not accurately shown.

[0028] The damper device 1 according to one embodiment is provided on the power transmission path between a drive source (not shown) such as an engine or a motor and a transmission or the like, and the power from the drive source is transmitted via the flywheel 2 and transmitted (output) to the transmission or the like (see FIG. 3).

[0029] The damper device 1 absorbs and attenuates torque vibration. As shown in FIGS. 1 to 5, this damper device 1 mainly includes a disk plate 100 as a first rotating body to which power is transmitted from the flywheel 2, a hub 200 as a second rotating body, a control plate 300, an elastic mechanism portion 400, a thrust member 500, a first sliding portion 600, and a second sliding portion 700. In this specification, the axial direction means a direction extending parallel to the rotation axis O, the radial direction means a direction orthogonal to the rotation axis O, and the circumferential direction means a direction orbiting around the rotation axis O.

[0030] The flywheel 2 is an annular plate member fixed to the drive shaft Z connected to the drive source by bolts 3.

[0031] Further, as shown in FIG. 3, the power transmitted from the drive shaft Z to the flywheel 2 is transmitted to the disk plate 100 via a cover plate 10 fixed to the flywheel 2 by bolts 4 and integrally rotating with the flywheel 2 and a first friction material 20. A pressure plate 30 is fixed to the cover plate 10, and the cover plate 10 and the pressure plate 30 are configured to rotate integrally. Further, a support plate 11 is fixed to the flywheel 2 by bolts 4 together with the cover plate 10, and the support plate 11 supports the disc spring 40. The disc spring 40 biases the pressure plate 30 to press against a lining plate 101 in the disk plate 100 described later via a second friction material 21, and together with the cover plate 10, transmits the power transmitted to the flywheel 2 to the disk plate 100 (lining plate 101).

[0032] In addition, when the damper device 1 cannot absorb the torsional torque fluctuations in the twisting direction, the support plate 11, the pressure plate 30, and the disc spring 40 can function as limiters that cause slippage (cut off the power transmission from the cover plate 10 and the pressure plate 30 to the disc plate 100). In the limiter, a conventionally known structure may be combined.

[0033] 1-1. Disk plate 100 In the damper device 1, as described above, power from a drive source such as an engine or a motor is transmitted to the disc plate 100 as the first rotating body arranged on the most upstream side in the power transmission path via the flywheel 2. The disc plate 100 is formed of, for example, a metal material, and as shown in FIGS. 1 to 4, it is provided rotatably around the rotation axis O with a hub 200 or the like as a second rotating body described later interposed therebetween. The disc plate 100 includes a first plate 100A and a second plate 100B as a pair of substantially disc-shaped plate members provided on both axial sides of the hub 200 (the second plate 100B is arranged to face the first plate 100A in the axial direction). As shown in FIGS. 3 and 4, the first plate 100A and the second plate 100B have symmetrical shapes in the axial direction, and a substantially annular lining plate 101 whose axial position can be appropriately adjusted is interposed therebetween, and they are connected by a plurality of rivets 120 near the outer periphery and provided to be integrally rotatable.

[0034] In addition, when power from a drive source such as an engine or a motor is transmitted from the cover plate 10 and the pressure plate 30 to the lining plate 101 via the first friction material 20 and the second friction material 21 provided on the lining plate 101, it is transmitted from the lining plate 101 to the first plate 100A and the second plate 100B near the rivet 120.

[0035] The first plate 100A and the second plate 100B cooperate with each other to form accommodation regions (in the example shown in FIG. 1, four accommodation regions are shown) that accommodate the elastic mechanism portion 400 described later, corresponding to regions I to IV respectively, and have a shape that bulges in the axial direction. Each accommodation region extends substantially linearly or substantially in an arc shape along the circumferential direction of the disk plate 100 to accommodate the first elastic member 410 and the pair of sheet members 420 (sheet member 420A and sheet member 420B) in the elastic mechanism portion 400 that extends along the circumferential direction of the disk plate 100. Note that regions I to IV refer to four regions each having a substantially 90-degree sector as shown in FIG. 1 when the damper device 1 is viewed from above.

[0036] Specifically, with reference to FIG. 1, the first plate 100A and the second plate 100B form a first accommodation region 102a, a second accommodation region 102b, a third accommodation region 102c, and a fourth accommodation region 102d that extend along the circumferential direction, corresponding to regions I to IV respectively. Note that, as will be described later, the hub 200 is provided with window holes 206a, 206b, 206c, and 206d corresponding to the first accommodation region 102a, the second accommodation region 102b, the third accommodation region 102c, and the fourth accommodation region 102d in each region.

[0037] Focusing on region IV, as shown in FIG. 1, the first plate 100A and the second plate 100B include an end face (the fourth end face) 104d1 and the other end face (the fourth other end face) 104d2 that faces this as side walls surrounding the fourth accommodation region 102d. These fourth end face 104d1 and fourth other end face 104d2 extend along the axial direction of the disk plate 100 as an example.

[0038] Similarly, focusing on region I, the first plate 100A and the second plate 100B include an end face (the first end face) 104a1 and the other end face (the first other end face) 104a2 opposite thereto as side walls surrounding the first accommodation region 102a. Focusing on region II, the first plate 100A and the second plate 100B include an end face (the second end face) 104b1 and the other end face (the second other end face) 104b2 opposite thereto as side walls surrounding the second accommodation region 102b. Focusing on region III, the first plate 100A and the second plate 100B include an end face (the third end face) 104c1 and the other end face (the third other end face) 104c2 opposite thereto as side walls surrounding the third accommodation region 102c. These side walls are in contact (engagement) with an elastic mechanism portion 400 described later.

[0039] As shown in FIG. 3, the lining plate 101 in the disk plate 100 is arranged at the same axial position (in a straight line in the radial direction) as the hub 200. Therefore, as shown in FIGS. 2 and 4, notches 105 for allowing circumferential movement (relative rotation) of the hub 200 are provided in each of regions I to IV in the lining plate 101. Further, the outer edge portion of the notch 105 functions as a restricting portion 106 for restricting excessive relative rotation of the hub 200.

[0040] Also, the inner surface 110A of the first plate 100A can support a second elastic member 604 that can form a part of a first sliding portion 600 described later. As will be described later, when the first sliding portion 600 is provided between the second plate 100B and the hub 200, the inner surface 110B of the second plate 100B can support the second elastic member 604.

[0041] Regarding other details of the first plate 100A and the second plate 100B, they will be described later as appropriate.

[0042] 1-2. Hub 200 The hub 200 as the second rotating body functions as an output member in the damper device 1, is formed of, for example, a metallic material, has a generally disk-shaped form as a whole, is sandwiched between the first plate 100A and the second plate 100B, and is provided so as to be relatively rotatable with respect to the disk plate 100 (the first plate 100A and the second plate 100B) around the rotation axis O. Further, as shown in FIGS. 3 and 4, the hub 200 can insert an input shaft (not shown) of a transmission through a through hole 203 formed in a generally cylindrical cylindrical portion 202 and spline-couple with the input shaft. Further, the hub 200 is provided with a disk portion 205 extending radially outward from the cylindrical portion 202.

[0043] As described above, window holes 206a, 206b, 206c, and 206d corresponding to the first accommodation region 102a, the second accommodation region 102b, the third accommodation region 102c, and the fourth accommodation region 102d are provided at equal intervals in the disk portion 205. These window holes 206a to 206d provided in the hub 200 are provided corresponding to an elastic mechanism portion 400 described later. That is, the elastic mechanism portion 400 is accommodated in each of the window holes 206a to 206d.

[0044] Further, in association with region I, as shown in FIG. 2, the window hole 206a has an engagement portion (first one-end-side engagement portion) 206a1 on one end side and an engagement portion (first other-end-side engagement portion) 206a2 facing the same, and is in contact (engagement) with the elastic mechanism portion 400. Similarly, in association with region II, the window hole 206b has an engagement portion (second one-end-side engagement portion) 206b1 on one end side and an engagement portion (second other-end-side engagement portion) 206b2 facing the same, and is in contact (engagement) with the elastic mechanism portion 400. Further, in association with region III, the window hole 206c has an engagement portion (third one-end-side engagement portion) 206c1 on one end side and an engagement portion (third other-end-side engagement portion) 206c2 facing the same, and is in contact (engagement) with the elastic mechanism portion 400. Further, in association with region IV, the window hole 206d has an engagement portion (fourth one-end-side engagement portion) 206d1 on one end side and an engagement portion (fourth other-end-side engagement portion) 206d2 facing the same, and is in contact (engagement) with the elastic mechanism portion 400.

[0045] In addition, each of the window holes 206a to 206d "abuts against the elastic mechanism part 400" means that it abuts against the first elastic member 410 or the pair of sheet members 420, which will be described later.

[0046] At the radial end portions of the disc portion 205, corresponding to the regions I to IV, projection portions 207a, 207b, 207c, and 207d are provided. The projection portions 207a to 207d are accommodated in the notch 105 provided in the lining plate 101 so that the hub 200 can rotate relative to the disc plate 100. Further, when the hub 200 rotates relative to a predetermined torsional angle, the projection portions 207a to 207d abut against the restricting portion 106, which is the outer edge portion of the notch 105, and excessive relative rotation of the hub 200 is restricted.

[0047] Also, on the radially inner sides of the above-described window holes 206a, 206b, 206c, and 206d, as shown in FIGS. 2 to 4, groove portions 208a, 208b, 208c, and 208d for receiving the axially extending portions 303a to 303d of the control plate 300, which will be described later, are provided. In the damper device 1 of one embodiment, each of the groove portions 208a to 208d is provided continuously (integrally) with each of the window holes 206a to 206d, but is not limited thereto, and may be provided at any portion of the disc portion 205.

[0048] 1-3. Control plate 300 The control plate 300 is formed of a metal material such as spring steel, for example, and has a generally annular shape as a whole. In the damper device 1 according to one aspect, only one control plate 300 is provided, and in the axial direction, it is arranged only in either the first accommodation space 100x between the first plate 100A and the hub 200 or the second accommodation space 100y between the second plate 100B and the hub 200. In FIG. 3, an example in which the control plate 300 is arranged in the first accommodation space 100x is shown.

[0049] As shown in FIGS. 2 to 5, the control plate 300 mainly includes a main portion 301 provided in a substantially annular shape, a radially extending portion 302 that extends radially from the main portion 301 and abuts against an elastic mechanism portion 400 described later, and an axially extending portion 303 that extends axially and is at least partially accommodated in the hub 200 (the case of being partially accommodated in the first rotating body 100 will be described later). The radially extending portion 302 is provided with a radially extending portion 302a in region I, a radially extending portion 302b in region II, a radially extending portion 302c in region III, and a radially extending portion 302d in region IV so as to correspond to each of the aforementioned regions I to IV. Similarly, the axially extending portion 303 is also provided with an axially extending portion 303a in region I, an axially extending portion 303b in region II, an axially extending portion 303c in region III, and an axially extending portion 303d in region IV so as to correspond to each of the aforementioned regions I to IV.

[0050] As shown in FIG. 2 and the like, the radially extending portions 302a to 302d are provided in association with regions I to IV. The radially extending portion 302a is provided so as to abut against the first elastic member 410 (or either one of the seat members 420A and 420B that constitute the pair of seat members 420) accommodated in the first accommodation region 102a (window hole 206a). The radially extending portion 302b is provided so as to abut against the first elastic member 410 (or either one of the seat members 420A and 420B that constitute the pair of seat members 420) accommodated in the second accommodation region 102b (window hole 206b). The radially extending portion 302c is provided so as to abut against the first elastic member 410 (or either one of the seat members 420A and 420B that constitute the pair of seat members 420) accommodated in the third accommodation region 102c (window hole 206c). The radially extending portion 302d is provided so as to abut against the first elastic member 410 (or either one of the seat members 420A and 420B that constitute the pair of seat members 420) accommodated in the fourth accommodation region 102d (window hole 206d).

[0051] The length extending in the radial direction of the radially extending portions 302a to 302d is not particularly limited as long as a sufficient contact area can be ensured with respect to the elastic mechanism portion 400 (either the first elastic body 400 or one of the sheet members 420A and 420B constituting the pair of sheet members 420).

[0052] When the control plate 300 is disposed in the first accommodation space 100x as shown in FIG. 3, the radially extending portions 302a to 302d face both the first plate 100A and the hub 200 in the axial direction. Accordingly, the radially extending portions 302a to 302d have a surface that slidably contacts a later-described first sliding portion 600 disposed between the first plate 100A and the control plate 300 to generate a first sliding torque.

[0053] As shown in FIGS. 2 to 6, the axially extending portions 303a to 303d are provided in association with regions I to IV. The axially extending portion 303a is accommodated in a groove portion 208a provided radially inside the window hole 206a, the axially extending portion 303b is accommodated in a groove portion 208b provided radially inside the window hole 206b, the axially extending portion 303c is accommodated in a groove portion 208c provided radially inside the window hole 206c, and the axially extending portion 303d is provided so as to be accommodated in a groove portion 208d provided radially inside the window hole 206d.

[0054] As shown in FIG. 6, the axially extending portion 303a is accommodated at a position close to a wall portion 208w defining the groove portion 208a (at least a position deviated from the central position of the groove portion 208a). The axially extending portion 303b, the axially extending portion 303c, and the axially extending portion 303d are also accommodated at positions similar to those of the axially extending portion 303a in the corresponding groove portions 208b, 208c, and 208d.

[0055] Here, the axially extending portions 303a to 303d are not engaged or fitted with the hub 200 by any means in the corresponding groove portions 208a to 208d, and are configured such that the hub 200 and the control plate 300 can rotate integrally only in a predetermined case. Therefore, the control plate 300 and the hub 200 do not always rotate integrally.

[0056] Here, the aforementioned "predetermined case" will be described. For example, when the hub 200 rotates relative to the disk plate 100 in a predetermined direction (in FIGS. 1 and 2, for example, the L direction (counterclockwise direction)) by a predetermined torsional angle or more, the axially extending portions 303a to 303d respectively abut against the wall portion 208w that defines the groove portion 208a. Thereby, only when the hub 200 rotates relative to the disk plate 100 in a predetermined direction (in FIGS. 1 and 2, for example, the L direction (counterclockwise direction)) by a predetermined torsional angle or more, the control plate 300 rotates integrally with the hub 200 relative to the disk plate 100 in a predetermined direction (the L direction in FIGS. 1 and 2). Thereby, the radially extending portion 302a can slidably contact the sliding surface (first sliding surface) 602a of the first sliding portion 600 described later to generate a first sliding torque. Similarly, the radially extending portions 302b to 302d can also slidably contact the first sliding surface 602a of the first sliding portion 600 to generate a first sliding torque. The mechanism by which the control plate 300 and the hub 200 can rotate integrally will be described in detail later.

[0057] On the other hand, in cases other than the above where the aforementioned control plate 300 rotates integrally with the hub 200, basically, the hub 200 rotates relative to the control plate 300. In this case, a second sliding portion 700, which will be described later and is disposed between the hub 200 and the control plate 300, can generate a second sliding torque by sliding relative to the hub 200 or sliding relative to the control plate 300.

[0058] On the surface that slides in contact with the first sliding surface 602a of the first sliding portion 600 in the radially extending portions 302a to 302d, in order to increase (or decrease) the magnitude of the first sliding torque, a generally known friction material is preferably applied separately, or a predetermined surface treatment is performed. Thereby, it becomes possible to adjust the magnitude of the first sliding torque to a desired magnitude.

[0059] Also, when the second sliding portion 700 described later generates a second sliding torque by sliding with respect to the control plate 300, on the surface that slides in contact with the second sliding portion 700 in the radially extending portions 302a to 302d (the surface on the opposite side in the axial direction from the surface that slides in contact with the first sliding surface 602a of the first sliding portion 600), in order to increase (or decrease) the magnitude of the second sliding torque, a generally known friction material is preferably applied separately, or a predetermined surface treatment is performed.

[0060] By the way, in the damper device 1 according to the embodiment shown in FIGS. 1 to 6, the first sliding torque that occurs only in the aforementioned "predetermined case" is appropriately set through the aforementioned friction material, surface treatment, etc. so as to be a torque larger than the second sliding torque.

[0061] 1-4. Elastic mechanism section 400 As shown in FIGS. 1 to 4 and 6, the elastic mechanism portion 400 is mainly composed of a first elastic member 410 and a pair of sheet members 420 (sheet member 420A and sheet member 420B) that sandwich and support the first elastic member 410 from both sides in each of the regions I to IV, but the pair of sheet members 420 may be omitted. As shown in FIGS. 1 to 4, in each of the regions I to IV, one first elastic member 410 may be arranged, or two or more first elastic members 410 may be arranged in series.

[0062] As an example, the first elastic member 410 can use a generally known coil spring. Also, as long as the seat members 420A and 420B can support the first elastic member 410 while sandwiching it from both sides, their forms, structures, etc. are not particularly limited, and for example, known ones can be used.

[0063] In the embodiments shown in FIGS. 1 to 4, as an example, the disk plate 100 has four accommodation regions, that is, a first accommodation region 102a, a second accommodation region 102b, a third accommodation region 102c, and a fourth accommodation region 102d (correspondingly, the hub 200 is also provided with the window holes 206a, 206b, 206c, and 206d as described above). Therefore, one first elastic member 410 and a pair of seat members 420 (seat member 420A and seat member 420B) are accommodated in each of these four accommodation regions, that is, corresponding to each of the regions I to IV.

[0064] Here, focusing on region I, as shown in FIGS. 1 and 2, the seat member 420A engages with the first end surface 104a1 of the disk plate 100 (the first plate 100A and the second plate 100B) and the engaging portion 206a1 on the first one - end side provided on the hub 200, respectively. Also, the seat member 420B engages with the first other - end surface 104a2 of the disk plate 100 (the first plate 100A and the second plate 100B) and the engaging portion 206a2 on the first other - end side provided on the hub 200, respectively. Similarly, in regions II to IV, the seat member 420A and the seat member 420B that constitute the pair of seat members 420 are engaged with the disk plate 100 and the hub 200.

[0065] As described above, the radially extending portions 302a to 302d in the control plate 300 are provided so that each of them abuts against the first elastic member 410 (or either one of the seat member 420A and the seat member 420B that constitute the pair of seat members 420) in each of the regions I to IV, as shown in FIG. 2 and the like.

[0066] With the above configuration, the elastic mechanism portion 400 can elastically connect the disk plate 100 and the hub 200 in the rotational direction. That is, after the power from a drive source such as an engine or a motor is transmitted in the order of the disk plate 100, the elastic mechanism portion 400, and the hub 200, when the disk plate 100 and the hub 200 rotate relative to each other, the first elastic member 410 of the elastic mechanism portion 400 is compressed and deformed to absorb torque fluctuations.

[0067] 1-5. Thrust member 500 The thrust member 500 is disposed in a space different from the space in which the control plate 300 is disposed among the aforementioned first accommodation space 100x and second accommodation space 100y. That is, in one embodiment according to FIGS. 1 to 6, since the control plate 300 is disposed in the first accommodation space 100x, the thrust member 500 is disposed in the second accommodation space 100y instead of the first accommodation space 100x. When the control plate 300 is disposed in the second accommodation space 100y, the thrust member 500 will be disposed in the first accommodation space 100x.

[0068] In one embodiment disposed in the second accommodation space 100y, as shown in FIG. 3, the thrust member 500 is disposed between the second plate 100B and the hub 200. The thrust member 500 is formed of, for example, a resin material and has a substantially cylindrical fitting portion 501 and a substantially annular main portion 502 as a whole.

[0069] As shown in FIG. 3, the fitting portion 501 corresponds to the fitting hole 112 provided in the second plate 100B as an example and can be fitted (engaged) into the second fitting hole 112. Thereby, the thrust member 500 is integrated with the second plate 100B (disk plate 100) and rotates integrally with the disk plate 100 around the rotation axis O. Note that the fitting portion 501 may not be fitted into the fitting hole 112 provided in the second plate 100B, and may be fitted into another fitting hole (not shown) separately provided in the hub 200, for example, and rotate integrally with the hub 200 around the rotation axis O. Alternatively, the fitting portion 501 may be configured not to be fitted into either the second plate 100B or the hub 200.

[0070] As shown in FIG. 3, the main portion 502 has a first surface 502x slidable with respect to the second plate 100B and a second surface 502y slidable with respect to the hub 200. Thereby, the main portion 502 can slide with respect to the second plate 100B and / or with respect to the hub 200 to generate a sliding torque (third sliding torque) different from the first sliding torque and the second sliding torque described above.

[0071] In the damper device 1 according to the embodiment shown in FIGS. 1 to 6, as will be described later, the second elastic member 604 of the first sliding portion 600 biases the plate portion 602 in a direction approaching the control plate 300 (in FIG. 3, the left direction in the paper surface). At this time, the reaction force related to the biasing is transmitted from the second elastic member 604 to the first plate 100A, so that the first plate 100A is slightly biased in a direction away from the control plate 300 (in FIG. 3, the right direction in the paper surface). In conjunction with this, the second plate 100B integrated with the first plate 100A via the rivet 120 is also slightly biased in a direction approaching the control plate 300 (in FIG. 3, the right direction in the paper surface). As a result, the second surface 502y of the thrust member 500 is pressed against the hub 200, and the above-described third sliding torque is generated.

[0072] This third sliding torque always occurs when the disk plate 100 and the hub 200 rotate relative to each other, and can be used in both the formation of the "small hysteresis torque" and the formation of the "large hysteresis torque" in the damper device 1. In the damper device 1 according to an embodiment shown in FIGS. 1 to 6, the "small hysteresis torque" means the combined torque of the second sliding torque and the third sliding torque described above, and the "large hysteresis torque" means the combined torque of the first sliding torque and the third sliding torque described above.

[0073] 1-6. First sliding section 600 In one embodiment, the first sliding portion 600 is disposed between the disk plate 100 (first plate 100A) and the control plate 300, and slides with respect to the radially extending portions 302 (radially extending portions 302a to 302d) of the control plate 300 to generate a first sliding torque.

[0074] As shown in FIGS. 3 and 4, the first sliding portion 600 according to an embodiment has a substantially annular plate portion 602 having a first sliding surface 602a that slides with respect to the radially extending portions 302 (radially extending portions 302a to 302d) of the control plate 300, and a second elastic member 604 that biases the first sliding surface 602a of the plate portion 602 in a direction approaching the radially extending portions 302 of the control plate 300 (in FIG. 3, the left direction of the paper surface). In one embodiment, the first sliding portion 600 is configured such that the second elastic member 604 is supported by the first plate 100A, and the plate portion 602 extends in the axial direction and engages with the first plate 100A. Thereby, the first sliding portion 600 is configured to be able to rotate integrally with the disk plate 100. Thereby, when the control plate 300 rotates relative to the disk plate 100, the first sliding surface 602a of the first sliding portion 600 is pressed against the radially extending portion 302 to generate a first sliding torque.

[0075] The plate portion 602 is formed from, for example, a resin material, a metal material composed of a compound containing a 3d transition metal, or the like. In order to increase (or decrease) the magnitude of the first sliding torque generated by sliding with the radially extending portion 302, a generally known friction material is preferably separately applied to the first sliding surface 602a, or a predetermined surface treatment is performed. Thereby, it becomes possible to adjust the magnitude of the first sliding torque to a desired magnitude.

[0076] As the second elastic member 604, a generally known disc spring can be used, but it is not limited thereto. While being supported by the first plate 100A, the second elastic member 604 biases the first sliding surface 602a of the plate portion 602 in a direction approaching the radially extending portion 302 of the control plate 300 (in FIG. 3, the left direction in the drawing plane) as described above. On the other hand, the reaction force related to the biasing is transmitted from the second elastic member 604 to the first plate 100A.

[0077] 1-7. Second sliding section 700 In one embodiment, the second sliding portion 700 is disposed between the control plate 300 and the hub 200 and slides at least with respect to the hub 200 to generate a second sliding torque.

[0078] In one embodiment, the second sliding portion 700 has a generally annular shape as a whole and has a second sliding surface 702a slidable with respect to the hub 200. Therefore, in cases other than the “predetermined case” described above, the second sliding portion 700 rotates relative to the hub 200, and the second sliding torque is generated by the second sliding surface 702a sliding with respect to the hub 200.

[0079] Incidentally, in conjunction with the plate portion 602 of the first sliding portion 600 being biased in the direction approaching the control plate 300 by the second elastic member 604 of the first sliding portion 600 described above, the control plate 300 is biased in the direction approaching the hub 200. Further, the biased control plate 300 biases the second sliding portion 700 in the direction approaching the hub 200. As a result, the second sliding surface 702a of the second sliding portion 700 is pressed against the hub 200, so that the second sliding torque is surely generated. That is, the biasing force of the second elastic member 604 is sequentially transmitted to the plate portion 602, the control plate 300, and the second sliding portion 700.

[0080] Note that the second sliding portion 700 may have a second sliding surface 702b that can slide relative to the control plate 300 to generate a second sliding torque. If the control plate 300 and the second sliding portion 700 are configured to be relatively rotatable, the second sliding surface 702b and the radially extending portion 302 of the control plate 300 can slide to generate the second sliding torque.

[0081] In one embodiment, the second sliding portion 700 may be configured to engage with the control plate 300 and rotate integrally with the control plate 300, or may be configured not to engage with either the control plate 300 or the hub 200. For example, it may be configured to engage with the first plate 100A.

[0082] Similar to other sliding surfaces, a generally known friction material is preferably separately applied to the second sliding surfaces 702a and 702b, or a predetermined surface treatment is performed.

[0083] 2. Operation of the damper device Next, the operation of the damper device 1 having the above configuration will be described with reference to FIGS. 7A to 7F and FIG. 8. FIG. 7A is a schematic top view schematically showing a state in which the first rotating body (disk plate 100) and the second rotating body (hub 200) are not relatively rotating in the damper device 1 according to one embodiment. FIG. 7B is a schematic top view schematically showing a state in which the second rotating body (hub 200) is relatively rotated by a torsional angle θ1° in the positive direction with respect to the first rotating body (disk plate 100) in the damper device 1 according to one embodiment. FIG. 7C is a schematic top view schematically showing a state in which the second rotating body (hub 200) is relatively rotated by a torsional angle θ2° in the positive direction with respect to the first rotating body (disk plate 100) in the damper device 1 according to one embodiment. FIG. 7D is a schematic top view schematically showing a state in which the second rotating body (hub 200) is relatively rotated by a torsional angle θ3° in the negative direction with respect to the first rotating body (disk plate 100) in the damper device 1 according to one embodiment. FIG. 7E is a schematic top view schematically showing a state in which the second rotating body (hub 200) is relatively rotated by a torsional angle θ4° in the negative direction with respect to the first rotating body (disk plate 100) in the damper device 1 according to one embodiment. FIG. 7F is a schematic top view schematically showing a state in the middle of canceling the relative rotation of the second rotating body (hub 200) with respect to the first rotating body (disk plate 100) from the state of FIG. 7E in the damper device 1 according to one embodiment. FIG. 8 is a schematic characteristic diagram schematically showing the torsional characteristics in the damper device 1 according to one embodiment. In FIGS. 7A to 7F, for the sake of convenience, the description of the pair of sheet members 420 (sheet member 420A and sheet member 420B) in the elastic mechanism portion 400 is omitted.

[0084] FIG. 7A shows a state in which, although power from a drive source such as an engine or a motor is transmitted to the damper device 1, no relative rotation occurs between the disk plate 100 and the hub 200 (torsional angle 0°). In this case, none of the first sliding torque, the second sliding torque, and the third sliding torque described above occur.

[0085] In a state where no relative rotation occurs between the disk plate 100 and the hub 200 shown in FIG. 7A, the axially extending portions 303a to 303d of the control plate 300 are accommodated in the groove portions 208a to 208d of the corresponding hub 200 at positions close to the wall portions 208w defining the groove portions 208a to 208d. That is, the same distance gaps are formed between the axially extending portion 303a and the wall portion 208w, between the axially extending portion 303b and the wall portion 208w, between the axially extending portion 303c and the wall portion 208w, and between the axially extending portion 303d and the wall portion 208w, and the axially extending portions 303a to 303d are not in contact with the wall portions 208w, respectively.

[0086] Next, FIG. 7B shows a case where relative rotation occurs between the disk plate 100 and the hub 200 from the state of FIG. 7A, and a twist of θ1° occurs on the positive side. Here, the positive side refers to a case where the hub 200 rotates (moves) relative to the disk plate 100 in the R direction (clockwise direction in FIG. 7B), for example. In this case, the hub 200 rotates relative to the disk plate 100 while deflecting the first elastic member 410. Also, in the twist angles from 0° to θ1°, since the distances of the gaps between the axially extending portions 303a to 303d and the corresponding wall portions 208w gradually increase, the two (the axially extending portion 303 and the wall portion 208w) are still not in contact. Therefore, the control plate 300 does not rotate relative to the disk plate 100 without being affected by the relative rotation of the hub 200 with respect to the disk plate 100. On the other hand, the control plate 300 rotates relative to the hub 200 (the hub 200 rotates relative to the control plate 300).

[0087] In this case (the state of FIG. 7A to the state of FIG. 7B), as described above with reference to FIG. 3, due to the sliding between the second surface 502y of the thrust member 500 that rotates integrally with the disk plate 100 and the hub 200 (disk portion 205), the above-described third sliding torque is generated. Further, based on the relative rotation between the hub 200 and the control plate 300, the second sliding surface 702a of the second sliding portion 700 slides with respect to the hub 200 (disk portion 205), thereby generating a second sliding torque. As described above, when the second sliding portion 700 is rotatable relative to the control plate 300, the second sliding torque described above may be generated by the sliding between the sliding surface 702b of the second sliding portion 700 and the radially extending portion 302 (radially extending portions 302a to 302d) of the control plate 300.

[0088] As described above, in the state of FIG. 7A to the state of FIG. 7B, the combined torque of the third sliding torque and the second sliding torque is generated as a hysteresis torque, and the hysteresis torque in this case corresponds to a "small hysteresis torque".

[0089] Next, FIG. 7C shows a case where, from the state of FIG. 7B, the relative rotation of the hub 200 with respect to the disk plate 100 further progresses, and a twist of θ2° occurs on the positive side. In this case, the hub 200 rotates relative to the disk plate 100 while further deflecting the first elastic member 410. Also, at the twist angle of θ2°, the protrusions 207a to 207d on the hub 200 come into contact with the restricting portions 106 provided on the lining plate 101, respectively. Thereby, since the hub 200 is restricted from rotating relative to the positive side by θ2° or more, the twist angle of θ2° can be regarded as the maximum twist angle on the positive side.

[0090] Note that in the torsional angles θ1° to θ2°, since the distance of the gap between the axially extending portions 303a to 303d and the corresponding wall portions 208w further widens, the two still do not come into contact with each other. Therefore, the control plate 300 does not rotate relative to the disk plate 100 without being affected by the relative rotation of the hub 200 with respect to the disk plate 100. On the other hand, the control plate 300 rotates relative to the hub 200 (the hub 200 rotates relative to the control plate 300).

[0091] Also in this case (the state of FIG. 7B to the state of FIG. 7C), similar to the case of transitioning from the state of FIG. 7A to the state of FIG. 7B, the third sliding torque and the second sliding torque are generated. Therefore, also in the state of FIG. 7B to the state of FIG. 7C, a "small hysteresis torque" is generated.

[0092] Next, FIG. 7D shows the case where relative rotation occurs between the disk plate 100 and the hub 200 from the state of FIG. 7A, and a torsional angle of θ3° occurs on the negative side. Here, the negative side refers to the case where, for example, the hub 200 rotates (moves) relative to the disk plate 100 in the L direction (counterclockwise direction in FIG. 7D). In this case, the hub 200 rotates relative to the disk plate 100 while deflecting the first elastic member 410. Also, in the torsional angles from 0° to θ3°, the distance of the gap between the axially extending portions 303a to 303d and the corresponding wall portions 208w gradually decreases, and at the torsional angle θ3°, the two come into contact with each other (the gap no longer exists). Therefore, the control plate 300 does not rotate relative to the disk plate 100 without being affected by the relative rotation of the hub 200 with respect to the disk plate 100 in the torsional angles from 0° to θ3°. On the other hand, the control plate 300 rotates relative to the hub 200 (the hub 200 rotates relative to the control plate 300).

[0093] Incidentally, the radially extending portions 302a to 302d of the control plate 300 are basically in contact with the elastic mechanism portion 400 in each of the regions I to IV. For example, when the hub 200 is not rotating relative to the disk plate 100 (the state of FIG. 7A), and when the hub 200 is rotating relative to the disk plate 100 in the positive direction (the states of FIGS. 7B and 7C), the radially extending portions 302a to 302d are always in contact with the elastic mechanism portion 400. However, as the twist angle approaches from 0° to θ3°, this contact relationship is sequentially eliminated. That is, at a twist angle of 0° to θ3°, a gap is formed between the radially extending portions 302a to 302d of the control plate 300 and the first elastic member 410 (elastic mechanism portion 400), and the distance (size) of the gap gradually increases. As described above, this is linked to the disappearance of the gap between the axially extending portions 303a to 303d and the wall portion 208w.

[0094] Even in this case (the states of FIGS. 7A to 7D), similar to the case of transitioning from the state of FIG. 7A to the state of FIG. 7B, the aforementioned third sliding torque and second sliding torque are generated. Therefore, even in the states of FIGS. 7A to 7D, a "small hysteresis torque" is generated.

[0095] Next, FIG. 7E shows a case where, from the state of FIG. 7D, the relative rotation of the hub 200 with respect to the disk plate 100 further progresses and a twist of θ4° occurs on the negative side. In this case, the hub 200 rotates relative to the disk plate 100 while further deflecting the first elastic member 410. Also, at a twist angle of θ4°, the protrusions 207a to 207d on the hub 200 come into contact with the restricting portions 106 provided on the lining plate 101, respectively. As a result, the hub 200 is restricted from rotating relative to the negative side by θ4° or more, so the twist angle of θ4° can be regarded as the maximum twist angle on the negative side. In this case, the gap formed in the state of FIG. 7D remains formed between the radially extending portions 302a to 302d of the control plate 300 and the elastic mechanism portion 400 (first elastic member 410).

[0096] In addition, at the twist angles θ3° to θ4°, the axially extending portions 303a to 303d are in contact with the corresponding wall portions 208w. Therefore, the control plate 300 (axially extending portions 303a to 303d) is guided by the hub 200 and relatively rotates in the L direction together with the hub 200 (integrally with the hub 200) with respect to the disk plate 100.

[0097] Also in this case (the state of FIG. 7D to the state of FIG. 7E), since the disk plate 100 and the hub 200 are relatively rotating, the above-described third sliding torque is generated in the same manner as when transitioning from the state of FIG. 7A to the state of FIG. 7B. In this case, since the control plate 300 also relatively rotates with respect to the disk plate 100, as described above, the first sliding torque is generated between the first sliding surface 602a of the first sliding portion 600 and the radially extending portion 302 (radially extending portions 302a to 302d) of the control plate 300. In this case, since the hub 200 and the control plate 300 rotate integrally, the second sliding torque is not generated. Also, the first sliding torque generated in this case is preset to be a torque larger than the second sliding torque. Regarding such a setting, the friction coefficients of the first sliding surface 602a that generates the first sliding torque and the radially extending portions 302a to 302d are appropriately adjusted by any of the methods described above.

[0098] From the above, in the state of FIG. 7D to the state of FIG. 7E, the combined torque of the third sliding torque and the first sliding torque is generated as the hysteresis torque, and the hysteresis torque in this case corresponds to a "large hysteresis torque".

[0099] Next, FIG. 7F shows a state in the process of transition from the state of FIG. 7E, where the relative rotation of the hub 200 with respect to the disk plate 100 is being eliminated, and the twist angle is changing from the maximum twist angle θ4° to 0° on the negative side. In this case, the hub 200 relatively moves in the R direction toward the twist angle of 0° while gradually eliminating the deflection of the first elastic member 410. That is, the twist angle in the state of FIG. 7F can be, for example, a twist angle between θ3° and θ4°.

[0100] In this case, first, when the hub 200 relatively moves in the R direction from the twist angle θ4° (moves so as to eliminate the relative rotation in the L direction), the contact relationship between the axially extending portions 303a to 303d and the corresponding wall portions 208w is eliminated, and a gap is sequentially formed again between the two. That is, the rotation of the control plate 300 in the R direction (relative rotation with respect to the disk plate 100) cannot be guided by the hub 200. Therefore, there is a slight time difference between the timing of eliminating the relative rotation on the negative side of the hub 200 with respect to the disk plate 100 and the timing of eliminating the relative rotation on the negative side of the control plate 300 with respect to the disk plate 100.

[0101] When the hub 200 relatively moves in the R direction by a predetermined angle (for example, let the predetermined angle be α°) from the twist angle θ4° to eliminate the relative rotation on the negative side (without guiding the control plate 300), the respective gaps between each of the radially extending portions 302a to 302d of the control plate 300 and the elastic mechanism portion 400, which were formed in the state of FIG. 7D (and FIG. 7E), gradually become smaller and finally disappear. As a result, the radially extending portions 302a to 302d of the control plate 300 and the elastic mechanism portion 400 come into contact again. In this state, since the elastic mechanism portion 400 is still in a deflected state, the elastic mechanism portion 400 presses (biases) the control plate 300 in the R direction. Thereby, the control plate 300 relatively rotates in the R direction with respect to the disk plate 100 based on the biasing force due to the deflection of the elastic mechanism portion 400.

[0102] To further explain the above process, from the twist angle θ = 4° to θ = 4 - α°, only the hub 200 rotates relative to the disk plate 100 in the R direction. Therefore, similar to the transition from the state of FIG. 7A to the state of FIG. 7B, the third sliding torque and the second sliding torque are generated. That is, a "small hysteresis torque" is generated. On the other hand, from θ = 4 - α° to 0°, not only the hub 200 but also the control plate 300 rotates relative to the disk plate 100 in the R direction. Therefore, similar to the transition from the state of FIG. 7D to the state of FIG. 7E, the third sliding torque and the first sliding torque are generated. That is, a "large hysteresis torque" is generated.

[0103] Based on the operation process of the damper device 1 described above with reference to FIGS. 7A to 7F, the torsional characteristics of the damper device 1 are shown as in FIG. 8.

[0104] Incidentally, the "large hysteresis torque" that occurs only on the negative side as described above, that is, the hysteresis torque obtained by summing the first sliding torque and the third sliding torque, is preferably used, for example, in a hybrid vehicle to absorb torque fluctuations that occur when the engine starts under certain conditions while the vehicle is being driven only by the motor with the engine stopped. Also, as described above, on the positive side, a "small hysteresis torque", that is, a hysteresis torque obtained by summing the second sliding torque and the third sliding torque, can be generated. In this way, the damper device 1 according to an embodiment can generate a relatively small hysteresis torque on the positive side and a relatively large hysteresis torque on the negative side while making the axial length of the damper device 1 compact by integrating the control plate 300 into one, and can stably generate various variations of hysteresis torque. Further, the damper device 1 according to an embodiment concentrates the generation of the first sliding torque on the radially extending portion 302 of the control plate 300 via the first sliding portion 600, so that the design from the viewpoints of the shape, structure, strength, etc. of the control plate 300 can be made relatively easy.

[0105] 3. Modification 3-1. Second embodiment Next, the configuration of the damper device 1 according to the second embodiment will be described with reference to FIG. 9. FIG. 9 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the second embodiment. Note that FIG. 9 is for simply explaining that the damper device 1 according to the second embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the common components between the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the second embodiment related to FIG. 9, although there are some parts that are expressed as having some differences in FIG. 9 for convenience, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations unless otherwise specified.

[0106] The damper device 1 according to the second embodiment has substantially the same configuration as the damper device 1 according to the above-described one embodiment, but the configurations of the thrust member 500 and the first sliding portion 600 are different from those of the above-described one embodiment. Note that in the damper device 1 according to the second embodiment, the detailed description of the same configuration as the damper device 1 according to one embodiment is omitted.

[0107] The thrust member 500 in the damper device 1 according to the second embodiment further has a fourth elastic member 505 that biases the integral structure including the above-described substantially cylindrical fitting portion 501 and substantially annular main portion 502 in the direction approaching the hub 200 (in FIG. 9, the right direction of the paper surface). As the fourth elastic member 505, a generally known disc spring can be used, but it is not limited thereto.

[0108] On the other hand, the first sliding portion 600 in the damper device 1 according to the second embodiment does not have the second elastic member 604 that was a component in one embodiment, and is composed only of the plate portion 602.

[0109] By adopting the above configuration, in the damper device 1 according to the second embodiment, the second surface 502y of the thrust member 500 is pressed against the hub 200 (disk portion 205) by the biasing force of the fourth elastic member 505. As a result, when the disk plate 100 and the hub 200 rotate relative to each other, it is possible to reliably and efficiently generate the above-described third sliding torque.

[0110] On the other hand, in conjunction with the fourth elastic member 505 biasing the second surface 502y in the direction approaching the hub 200, the reaction force related to this biasing is transmitted from the fourth elastic member 505 to the second plate 100B. As a result, the second plate 100B is slightly biased in the direction away from the hub 200 (in the left direction of the paper surface in FIG. 9). In conjunction with this, the first plate 100A integrated with the second plate 100B via the rivet 120 is also slightly biased in the direction approaching the control plate 300 (in the left direction of the paper surface in FIG. 9). The biasing force transmitted to the first plate 100A can be substituted for the biasing force by the second elastic member 604 according to one embodiment. Therefore, in the damper device 1 according to the second embodiment, even if the second elastic member 604, which was a component in one embodiment, is omitted from the first sliding portion 600, it is possible to generate a first sliding torque between the first sliding surface 602a of the first sliding portion 600 and the radially extending portion 302 of the control plate 300.

[0111] 3-2. Third embodiment Next, the configuration of the damper device 1 according to the third embodiment will be described with reference to FIG. 10. FIG. 10 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the third embodiment. Note that FIG. 10 is for simply explaining that the damper device 1 according to the third embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the components common to the damper device 1 according to one embodiment related to FIG. 3 and the damper device 1 according to the third embodiment related to FIG. 10, although there are some parts that are expressed as having some differences in FIG. 10 for convenience, it should be understood that the shapes and the like of the components according to both embodiments are common unless otherwise specified.

[0112] The damper device 1 according to the third embodiment has substantially the same configuration as the damper device 1 according to the above-described one embodiment, but the configurations of the first sliding portion 600 and the second sliding portion 700 are different from those of the above-described one embodiment. In the damper device 1 according to the third embodiment, the detailed description of the same configuration as that of the damper device 1 according to one embodiment is omitted.

[0113] The second sliding portion 700 in the damper device 1 according to the third embodiment, in addition to an integral structure having a second sliding surface 702a (and 702b) having a substantially annular shape, further has a third elastic member 705 that biases the integral structure in a direction approaching the hub 200 (in FIG. 10, the left direction on the paper surface). As the third elastic member 705, a generally known disc spring can be used, but it is not limited thereto.

[0114] On the other hand, the first sliding portion 600 in the damper device 1 according to the third embodiment does not have the second elastic member 604 that was a component in one embodiment, and is composed only of the plate portion 602.

[0115] The damper device 1 according to the third embodiment, with the above configuration, causes the second sliding surface 702a of the second sliding portion 700 to be pressed against the hub 200 (disk portion 205) by the biasing force of the third elastic member 705. As a result, when the disk plate 100 and the hub 200 rotate relative to each other and the hub 200 rotates relative to the control plate 300 (the control plate 300 rotates relative to the hub 200), it becomes possible to reliably and efficiently generate the above-described second sliding torque.

[0116] On the other hand, in conjunction with the third elastic member 705 biasing the second sliding surface 702a in the direction of pressing it against the hub 200, the reaction force related to this biasing is transmitted from the third elastic member 705 to the control plate 300. As a result, the control plate 300 is slightly biased in the direction approaching the first plate 100A (in FIG. 10, the right direction on the paper surface). Thus, in the damper device 1 according to the third embodiment, the radially extending portion 302 of the control plate 300 is pressed against the first sliding surface 602a of the first sliding portion 600, making it possible to reliably and efficiently generate the first sliding torque. In this configuration, since the control plate 300 is biased in the direction approaching the first plate 100A, even if the second elastic member 604, which was a component in one embodiment, is omitted, it is possible to generate the first sliding torque between the first sliding surface 602a of the first sliding portion 600 and the radially extending portion 302 of the control plate 300.

[0117] 3-3. Fourth embodiment Next, the configuration of the damper device 1 according to the fourth embodiment will be described with reference to FIG. 11. FIG. 11 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the fourth embodiment. Note that FIG. 11 is for simply explaining that the damper device 1 according to the fourth embodiment has the following different configuration with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the components common to the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the fourth embodiment related to FIG. 11, although there are some parts that are expressed as slightly different in FIG. 11 for convenience, basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0118] The damper device 1 according to the fourth embodiment has substantially the same configuration as the damper device 1 according to the above-described one embodiment, but the configuration of the first sliding portion 600 is different from that of the above-described one embodiment. In the damper device 1 according to the fourth embodiment, the detailed description of the same configuration as that of the damper device 1 according to one embodiment will be omitted.

[0119] The first sliding portion 600 in the damper device 1 according to the fourth embodiment is the same as that in one embodiment in that it is composed of the plate portion 602 and the second elastic member 604x (the second elastic member 604 in one embodiment), but the second elastic member 604x biases in the direction approaching the first plate 100A (in FIG. 11, the right direction of the paper surface) instead of the direction approaching the control plate 300 (in FIG. 11, the left direction of the paper surface). Also, the first sliding portion 600 of the damper device 1 according to the fourth embodiment is configured to engage with the control plate 300 (for example, the plate portion 602 engages with the radially extending portion 302 of the control plate 300), which is different from one embodiment. Therefore, the first sliding portion 600 can rotate integrally with the control plate 300. Note that the same second elastic member 604 as the second elastic member 604 according to one embodiment can be used for the second elastic member 604x.

[0120] When the damper device 1 according to the fourth embodiment has the above configuration, when the control plate 300 and the disk plate 100 rotate relative to each other (that is, in the aforementioned "predetermined case"), the first sliding surface 602a of the first sliding portion 600 is pressed against the inner surface 110A of the first plate 100A, so that a first sliding torque can be reliably and efficiently generated between the first sliding surface 602a and the inner surface 110A of the first plate 100A. In one embodiment, as shown in FIG. 3, the surface of the plate portion 602 facing the control plate 300 is referred to as the first sliding surface 602a. On the other hand, in the fourth embodiment, as shown in FIG. 11, the surface of the plate portion 602 facing the first plate 100A is referred to as the first sliding surface 602a. Therefore, the first sliding surface 602a should be understood as the surface that generates the first sliding torque in the first sliding portion 600.

[0121] On the other hand, in conjunction with the second elastic member 604x biasing the first sliding surface 602a in a direction approaching the first plate 100A, the reaction force related to the biasing is transmitted from the second elastic member 604x to the control plate 300. As a result, the control plate 300 is slightly biased in a direction approaching the hub 200 (in FIG. 11, the left direction of the paper surface). Thereby, in the damper device 1 according to the fourth embodiment, the second sliding surface 702a of the second sliding portion 700 is pressed against the hub 200 (disk portion 205) by the reaction force interlocking with the biasing force of the second elastic member 604x. Therefore, when the hub 200 and the control plate 300 rotate relative to each other, it is possible to reliably and efficiently generate a second sliding torque.

[0122] 3-4. Fifth embodiment Next, the configuration of the damper device 1 according to the fifth embodiment will be described with reference to FIG. 12. FIG. 12 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the fifth embodiment. Note that FIG. 12 is for simply explaining that the damper device 1 according to the fifth embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the components common to the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the fifth embodiment related to FIG. 12, although there are some parts that are expressed as having some differences in FIG. 12 for the sake of convenience, basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0123] The damper device 1 according to the fifth embodiment has a configuration substantially the same as that of the damper device 1 according to the above-described one embodiment, but the configurations of the thrust member 500, the first sliding portion 600, and the second sliding portion 700 are different from those of the above-described one embodiment. In the damper device 1 according to the fifth embodiment, the detailed description of the same configuration as that of the damper device 1 according to one embodiment is omitted.

[0124] The thrust member 500 in the damper device 1 according to the fifth embodiment, similar to the second embodiment, in addition to the integral structure composed of the above-described substantially cylindrical fitting portion 501 and the substantially annular main portion 502, further has a fourth elastic member 505 that biases the integral structure in the direction approaching the hub 200 (in FIG. 12, the right direction of the paper surface). As the fourth elastic member 505, a generally known disc spring can be used, but it is not limited thereto.

[0125] Furthermore, in the damper device 1 according to the fifth embodiment, the first sliding portion 600 and the second sliding portion 700 are integrally formed with the control plate 300. That is, the control plate 300, the first sliding portion 600, and the second sliding portion 700 are formed as one integral structure. The integral structure thus formed can be regarded as a control plate 300x (for convenience, the control plate in this fifth embodiment is referred to as "control plate 300x") that combines the functions of the first sliding portion 600 and the second sliding portion 700.

[0126] Therefore, the control plate 300x according to the fifth embodiment can have a first sliding surface 602a that directly slides on the inner surface 110A of the first plate 100A to generate a first sliding torque, and a second sliding surface 702a that directly slides on the hub 200 (disc portion 205) to generate a second sliding torque, on the radially extending portion 302.

[0127] By adopting the above configuration, in the damper device 1 according to the fifth embodiment, the second surface 502y of the thrust member 500 is pressed against the hub 200 (disc portion 205) by the biasing force of the fourth elastic member 505. As a result, when the disk plate 100 and the hub 200 rotate relative to each other, it becomes possible to reliably and efficiently generate the aforementioned third sliding torque.

[0128] When the fourth elastic member 505 biases the second surface 502y in the direction approaching the hub 200, the reaction force associated with this biasing is transmitted from the fourth elastic member 505 to the second plate 100B. As a result, the second plate 100B is slightly biased in the direction away from the hub 200 (in the left direction of the paper surface in FIG. 12). In conjunction with this, the first plate 100A integrated with the second plate 100B via the rivet 120 is also slightly biased in the direction approaching the control plate 300 (in the left direction of the paper surface in FIG. 12). Thereby, the inner surface 110A of the first plate 100A is pressed against the first sliding surface 602a of the control plate 300x. Thus, when the disk plate 100 and the control plate 300x rotate relative to each other, a reliable and efficient first sliding torque can be generated between the first sliding surface 602a of the control plate 300x and the inner surface 110A of the first plate 100A.

[0129] Also, in conjunction with the inner surface 110A of the first plate 100A being pressed against the first sliding surface 602a of the control plate 300x, the second sliding surface 702a of the control plate 300x is pressed against the hub 200 (disk portion 205). Thus, when the control plate 300x and the hub 200 rotate relative to each other, a reliable and efficient second sliding torque can be generated between the second sliding surface 702a of the control plate 300x and the hub 200.

[0130] 3-5. Sixth embodiment Next, the configuration of the damper device 1 according to the sixth embodiment will be described with reference to FIGS. 13 and 14. FIG. 13 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the sixth embodiment. FIG. 14 is a schematic view schematically showing the relationship between the disk plate 100 and the control plate 300 in the damper device 1 according to the sixth embodiment, with an enlarged view. Note that FIG. 13 is for simply explaining that the damper device 1 according to the sixth embodiment has the following different configurations from the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the common components between the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the sixth embodiment related to FIG. 13, although there are some places that are expressed as having some differences in FIG. 13 for convenience, basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0131] The damper device 1 according to the sixth embodiment has a configuration generally similar to that of the damper device 1 according to the above-described one embodiment, but the configurations of the disk plate 100, the hub 200, the control plate 300, the first sliding portion 600, and the second sliding portion 700 are different from those of the above-described one embodiment. In the damper device 1 according to the sixth embodiment, the detailed description of the same configuration as that of the damper device 1 according to one embodiment will be omitted.

[0132] In the damper device 1 according to the sixth embodiment, the control plate 300 is configured such that, unlike one embodiment, each of its axially extending portions 303a to 303d is not accommodated in the groove portions 208a to 208d of the hub 200, but is accommodated in the disk plate 100. Specifically, as shown in FIG. 14, on the first plate 100A of the damper device 1 according to the sixth embodiment, accommodation groove portions 130 (accommodation groove portions 130a to 130d) for accommodating the axially extending portions 303a to 303d are provided in association with the respective regions I to IV. Similar to the groove portions 208a to 208d of one embodiment being continuously provided in the window holes 206a to 206d of the hub 200, the accommodation groove portions 130a to 130d may be integrally provided inside the radial direction of the first accommodation region 102a, the second accommodation region 102b, the third accommodation region 102c, and the fourth accommodation region 102d provided on the first plate 100A, or may be independently provided on the first plate 100A. In FIG. 14, an example in which the accommodation groove portion 130a is provided independently of the first accommodation region 102a is shown.

[0133] In the sixth embodiment, as shown in FIG. 14, the axially extending portions 303a to 303d of the control plate 300 are accommodated with a gap of a predetermined distance formed at a position close to the wall portion 130w that defines the accommodation groove portions 130a to 130d. This corresponds to the axially extending portions 303a to 303d being accommodated at positions close to the wall portion 208w in one embodiment.

[0134] On the other hand, the groove portions 208a to 208d of the hub 200 in the damper device 1 according to the sixth embodiment can be omitted because the function of accommodating the axially extending portions 303a to 303d of the control plate 300 becomes unnecessary. On the other hand, as shown in FIG. 13, an engagement hole 210 with which the second sliding portion 700 engages is separately formed in the hub 200. Thereby, the second sliding portion 700 is engaged with the hub 200, and the second sliding portion 700 is configured to be able to rotate integrally with the hub 200.

[0135] In the damper device 1 according to the sixth embodiment, the first sliding portion 600 has basically the same configuration as in one embodiment, but is arranged at a position close to the rotation axis O.

[0136] The damper device 1 according to the sixth embodiment configured as described above basically operates in the same manner as in one embodiment. However, the relationship between the control plate 300 and the hub 200 according to one embodiment described with reference to FIGS. 7A to 7F is replaced with the relationship between the control plate 300 and the disk plate 100 (the first plate 100A) in the sixth embodiment.

[0137] Specifically, as in the cases of FIGS. 7B and 7C described above, it is assumed that relative rotation occurs between the disk plate 100 and the hub 200, and torsions of 0° to θ1° to θ2° occur on the positive side. In this case, it refers to the case where the hub 200 rotates (moves) in the R direction (clockwise direction in FIG. 7B) relative to the disk plate 100. However, when changing the perspective, it is synonymous with the disk plate 100 rotating (moving) in the L direction relative to the hub 200. In this case, in the sixth embodiment, the distance between the axial extension portions 303a to 303d of the control plate 300 and the wall portions 130w in the corresponding accommodation groove portions 130a to 130d gradually increases and the two do not come into contact. Therefore, the control plate 300 does not rotate relative to the hub 200 without being affected by the relative rotation of the disk plate 100 with respect to the hub 200. On the other hand, the control plate 300 rotates relative to the disk plate 100 (the disk plate 100 rotates relative to the control plate 300). Therefore, a first sliding torque is generated between the radial extension portion 302 of the control plate 300 and the first sliding surface 602a of the first sliding portion 600.

[0138] Next, assume a case where relative rotation occurs between the disk plate 100 and the hub 200, and a twist of 0° to θ3° occurs on the negative side, as in the case of FIG. 7D described above. In this case, it refers to the case where the hub 200 rotates (moves) relative to the disk plate 100 in the L direction (counterclockwise direction in FIG. 7B). However, when changing the perspective, it is synonymous with the disk plate 100 rotating (moving) relative to the hub 200 in the R direction. In this case, in the sixth embodiment, the distance between the axial extension portions 303a to 303d of the control plate 300 and the wall portions 130w in the corresponding accommodation groove portions 130a to 130d gradually decreases, and finally, the two come into contact at the twist angle θ3°. Therefore, even at the twist angles of 0° to θ3°, since there is a gap between the axial extension portions 303a to 303d and the wall portions 130w, the control plate 300 does not rotate relative to the hub 200 without being affected by the relative rotation of the disk plate 100 with respect to the hub 200. On the other hand, the control plate 300 rotates relative to the disk plate 100 (the disk plate 100 rotates relative to the control plate 300). Therefore, a first sliding torque is generated between the radial extension portion 302 of the control plate 300 and the first sliding surface 602a of the first sliding portion 600.

[0139] Next, assume a case where relative rotation occurs between the disk plate 100 and the hub 200, and a twist of θ3° to θ4° occurs on the negative side, as in the case of FIG. 7E described above. In this case, it refers to the case where the hub 200 rotates (moves) relative to the disk plate 100 in the L direction (counterclockwise direction in FIG. 7B). However, when changing the perspective, it is synonymous with the disk plate 100 rotating (moving) relative to the hub 200 in the R direction. In this case, in the sixth embodiment, the axially extending portions 303a to 303d of the control plate 300 come into contact with the wall portions 130w in the corresponding receiving groove portions 130a to 130d. Therefore, the control plate 300 rotates integrally with the disk plate 100. As a result, the control plate 300 rotates relative to the hub 200, and a second sliding torque is generated between the radially extending portions 302a to 302d of the control plate 300 and the second sliding surface 702b of the second sliding member 700.

[0140] In the sixth embodiment, unlike one embodiment, the second sliding torque is set to be larger than the first sliding torque.

[0141] Also, in the sixth embodiment, in the thrust member 500, a third sliding torque is generated in the same manner as in one embodiment. As a result, in the sixth embodiment, the combined torque of the third sliding torque and the first sliding torque is used as the "small hysteresis torque", and the combined torque of the third sliding torque and the second sliding torque is used as the "large hysteresis torque".

[0142] 3-6. Seventh embodiment Next, the configuration of the damper device 1 according to the seventh embodiment will be described with reference to FIG. 15. FIG. 15 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the seventh embodiment. Note that FIG. 15 is for simply explaining that the damper device 1 according to the seventh embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the components common to the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the seventh embodiment related to FIG. 15, for convenience, there are some parts expressed as having some differences in FIG. 15, but basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0143] The damper device 1 according to the seventh embodiment has substantially the same configuration as the damper device 1 according to the above-described one embodiment, but the configurations of the disk plate 100, the hub 200, the control plate 300, the thrust member 500, the first sliding portion 600, and the second sliding portion 700 are different from those of the above-described one embodiment. On the other hand, the damper device 1 according to the seventh embodiment has substantially the same configuration as the damper device 1 according to the above-described sixth embodiment. Therefore, in the damper device 1 according to the seventh embodiment, the description will be centered on the parts that are basically different from the damper device 1 according to the sixth embodiment, and the detailed description of other parts will be omitted.

[0144] In the thrust member 500 in the damper device 1 according to the seventh embodiment, similar to the second embodiment, a fourth elastic member 505 is provided. Thereby, the second surface 502y of the thrust member 500 is pressed against the hub 200 (disk portion 205) by the biasing force of the fourth elastic member 505, so that when the disk plate 100 and the hub 200 rotate relative to each other, it is possible to reliably and efficiently generate the above-described third sliding torque.

[0145] Also, as described in the aforementioned second embodiment, the reaction force of the biasing force of the fourth elastic member 505 is transmitted to the second plate 100B, whereby the first plate 100A is biased in a direction approaching the control plate 300 (in FIG. 15, the left direction in the drawing plane). As a result, the first plate 100A is pressed against the first sliding portion 600, and the control plate 300 is also pressed against the first sliding portion 600. That is, the first sliding portion 600 in the seventh embodiment does not have the second elastic member 604. Thereby, between the first plate 100A and the first sliding portion 600 (the first sliding surface 602a), and between the first sliding portion 600 (the first sliding surface 602a) and the radially extending portion 302 of the control plate 300, when the control plate 300 and the disk plate 100 rotate relative to each other, a first sliding torque can be generated.

[0146] On the other hand, the second sliding portion 700 in the damper device 1 according to the seventh embodiment is configured to be engaged with the control plate 300 and to be integrally rotatable with the control plate 300, which is different from the sixth embodiment. Specifically, in the seventh embodiment, the second sliding portion 700 is configured to be engaged (fitted) with an engagement hole 305 provided on the radially extending portion 302 of the control plate 300. With this configuration, similar to the sixth embodiment, when the control plate 300 and the hub 200 rotate relative to each other, a second sliding torque can be generated between the hub 200 (the disk portion 205) and the second sliding surface 702a of the second sliding portion 700.

[0147] In the seventh embodiment, similar to the sixth embodiment, the second sliding torque is set to be larger than the first sliding torque. Also, in the seventh embodiment, the combined torque of the third sliding torque and the first sliding torque is used as the "small hysteresis torque", and the combined torque of the third sliding torque and the second sliding torque is used as the "large hysteresis torque".

[0148] 3-7. Eighth embodiment Next, the configuration of the damper device 1 according to the eighth embodiment will be described with reference to FIG. 16. FIG. 16 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the eighth embodiment. Note that FIG. 16 is for simply explaining that the damper device 1 according to the eighth embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, although there are some parts where the common components of the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the eighth embodiment related to FIG. 16 are expressed as having some differences for convenience in FIG. 16, basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0149] The damper device 1 according to the eighth embodiment has substantially the same configuration as the damper device 1 according to the above-described one embodiment, but the configurations of the disk plate 100, the hub 200, the control plate 300, the first sliding portion 600, and the second sliding portion 700 are different from those of the above-described one embodiment. On the other hand, the damper device 1 according to the eighth embodiment has substantially the same configuration as the damper device 1 according to the above-described sixth embodiment. Therefore, in the damper device 1 according to the eighth embodiment, the description will be centered on the parts that are basically different from the damper device 1 according to the sixth embodiment, and the detailed description of other parts will be omitted.

[0150] In the second sliding portion 700 of the damper device 1 according to the eighth embodiment, similar to the third embodiment, a third elastic member 705 that biases the second sliding surface 702a in the direction of pressing against the hub 200 (disk portion 205) (leftward in the drawing in FIG. 16) is provided. At this time, the second sliding portion 700 can be engaged with the control plate 300. Thereby, when the control plate 300 and the hub 200 rotate relative to each other, a second sliding torque can be surely and efficiently generated between the hub 200 and the second sliding surface 702a.

[0151] On the other hand, the reaction force of the biasing force of the third elastic member 705 is transmitted to the control plate 300, so that the radially extending portion 302 of the control plate 300 is pressed (biased) against the first sliding portion 600. Further, in conjunction with this, the first sliding portion 600 is pressed against the first plate 100A. As a result, between the radially extending portion 302 of the control plate 300 and the first sliding portion 600 (the first sliding surface 602a), and between the first sliding portion (the first sliding surface 602a) and the inner surface 110A of the first plate 100A, when the control plate 300 and the disk plate 100 rotate relative to each other, a first sliding torque can be generated.

[0152] Furthermore, based on the above-mentioned reaction force, the first plate 100A is biased in a direction away from the control plate 300 (in the right direction of the paper surface in FIG. 16), so that the second plate 100B integrated with the first plate 100A via the rivet 120 is biased in a direction approaching the hub 200 (in the right direction of the paper surface in FIG. 16). As a result, on the first surface 502x and the second surface 502y of the thrust member 500, the above-mentioned third sliding torque can be reliably and efficiently generated.

[0153] In the eighth embodiment, similar to the sixth embodiment, the second sliding torque is set to be larger than the first sliding torque. Also, in the eighth embodiment, the combined torque of the third sliding torque and the first sliding torque is used as the "small hysteresis torque", and the combined torque of the third sliding torque and the second sliding torque is used as the "large hysteresis torque".

[0154] 3-8. Ninth embodiment Next, the configuration of the damper device 1 according to the ninth embodiment will be described with reference to FIG. 17. FIG. 17 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the ninth embodiment. Note that FIG. 17 is for simply explaining that the damper device 1 according to the ninth embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the components common to the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the ninth embodiment related to FIG. 17, for convenience, there are also some parts expressed as having some differences in FIG. 17, but basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0155] The damper device 1 according to the ninth embodiment has substantially the same configuration as the damper device 1 according to the above-described one embodiment, but the configurations of the disk plate 100, the hub 200, the control plate 300, the first sliding portion 600, and the second sliding portion 700 are different from those of the above-described one embodiment. On the other hand, the damper device 1 according to the ninth embodiment has substantially the same configuration as the damper device 1 according to the above-described seventh embodiment. Therefore, in the damper device 1 according to the ninth embodiment, the description will be centered on the parts that are basically different from the damper device 1 according to the seventh embodiment, and the detailed description of other parts will be omitted.

[0156] The first sliding portion 600 in the damper device 1 according to the ninth embodiment has a second elastic member 604 that biases the first sliding surface 602a in a direction approaching the first plate 100A (in FIG. 17, the right direction of the paper surface). Further, the first sliding portion 600 of the ninth embodiment can be engaged with the control plate 300 and can rotate integrally with the control plate 300. Thereby, when the control plate 300 and the disk plate 100 rotate relative to each other, the first sliding torque can be generated reliably and efficiently.

[0157] Further, due to the biasing force of the aforementioned second elastic member 604, the first plate 100A is biased in a direction away from the control plate 300 (in the right direction on the paper surface in FIG. 17). Here, since the biasing force is also transmitted to the second plate 100B integrated with the first plate 100A via the rivet 120, the second plate 100B is biased in a direction approaching the hub 200 (in the right direction on the paper surface in FIG. 17). Thereby, on the first surface 502x and the second surface 502y of the thrust member 500, the aforementioned third sliding torque can be reliably and efficiently generated.

[0158] In the ninth embodiment, similar to the sixth embodiment, the second sliding torque is set to be larger than the first sliding torque. Further, in the ninth embodiment, the combined torque of the third sliding torque and the first sliding torque is used as the "small hysteresis torque", and the combined torque of the third sliding torque and the second sliding torque is used as the "large hysteresis torque".

[0159] 3-9. Tenth embodiment Next, the configuration of the damper device 1 according to the tenth embodiment will be described with reference to FIG. 18. FIG. 18 is a schematic cross-sectional view schematically showing the configuration of the damper device 1 according to the tenth embodiment. Note that FIG. 18 is for simply explaining that the damper device 1 according to the tenth embodiment has the following different configurations with respect to the damper device 1 according to one embodiment, and is a view focusing on the portion related to region I. Therefore, regarding the common components between the damper device 1 according to one embodiment related to FIG. 3 etc. and the damper device 1 according to the tenth embodiment related to FIG. 18, although there are some parts that are expressed as having some differences in FIG. 18 for convenience, basically, it should be understood that the shapes etc. of the respective components according to both embodiments are common except for the following different configurations.

[0160] Although the damper device 1 according to the tenth embodiment has substantially the same configuration as that of the seventh embodiment described above, the first sliding portion 600 and the second sliding portion 700 are integrally formed with the control plate 300, similar to the fifth embodiment. That is, the control plate 300, the first sliding portion 600, and the second sliding portion 700 are formed as a single integral structure. The integral structure thus formed can be regarded as a control plate 300y (for convenience, the control plate in this tenth embodiment is referred to as "control plate 300y") that combines the functions of the first sliding portion 600 and the second sliding portion 700 according to the seventh embodiment.

[0161] Therefore, the control plate 300y according to the tenth embodiment can have a first sliding surface 602a that directly slides on the inner surface 110A of the first plate 100A to generate a first sliding torque, and a second sliding surface 702a that directly slides on the hub 200 (disk portion 205) to generate a second sliding torque, on the radially extending portion 302. Thereby, the damper device 1 according to the tenth embodiment can operate in the same manner as the damper device 1 according to the seventh embodiment.

[0162] In the tenth embodiment, similar to the seventh embodiment, the second sliding torque is set to be greater than the first sliding torque. Also, in the tenth embodiment, the combined torque of the third sliding torque and the first sliding torque is used as the "small hysteresis torque", and the combined torque of the third sliding torque and the second sliding torque is used as the "large hysteresis torque".

[0163] 3-10. Others Although all the above-described embodiments have been described in detail with an example in which the control plate 300 is housed in the first housing space 100x, as described above, the control plate 300 may be housed in the second housing space 100y. In this case, in all the embodiments, a configuration in which the components arranged in the first housing space 100x and the components arranged in the second housing space 100y are mutually interchanged may be adopted.

[0164] As described above, various embodiments have been illustrated. However, the above embodiments are merely examples and are not intended to limit the scope of the invention. The above embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. Also, each configuration, shape, size, length, width, thickness, height, number, etc. can be appropriately changed and implemented. Further, the various embodiments described above can also be applied to a damper device for use in applications that do not require the above-described limiter function, such as a clutch disk.

Explanation of Reference Numerals

[0165] 1 Damper device 100 First rotating body (disc plate) 100A First plate 100B Second plate 100x First accommodation space 100y Second accommodation space 200 Second rotating body (hub) 202 Cylindrical portion 205 Disk portion 206a to 206d Window holes 208a to 208d Groove portions 208w Wall portion 300 Control plate 302a to 302d Radially extending portions 303a to 303d Axially extending portions 400 Elastic mechanism portion 410 First elastic member 420 Pair of sheet members 420A, 420B Sheet members 500 Thrust member 502x First surface 502y Second surface 505 Fourth elastic member 600 First sliding portion 602a First sliding surface 604 Second elastic member 700 Second sliding portion 702a Second sliding surface 705 Third elastic member O Rotation axis

Claims

1. A first rotating body having at least a first plate that rotates around a rotation axis and a second plate that is disposed opposite to the first plate and rotates integrally with the first plate around the rotation axis, a second rotating body that rotates relative to the first rotating body around the rotation axis, an elastic mechanism portion that elastically connects the first rotating body and the second rotating body in the rotation direction, a radially extending portion that extends in the radial direction and abuts against the elastic mechanism portion, and an axially extending portion that extends in the axial direction and is at least partially accommodated in either one of the first rotating body and the second rotating body. In the axial direction, a control plate disposed only in either the first accommodation space between the first plate and the second rotating body or the second accommodation space between the second plate and the second rotating body, a first sliding portion disposed between the first rotating body and the control plate and sliding against at least one of the first rotating body and the control plate to generate a first sliding torque, a second sliding portion disposed between the second rotating body and the control plate and sliding against at least one of the second rotating body and the control plate to generate a second sliding torque, comprising: when the first rotating body and the second rotating body rotate relative to each other, generating the first sliding torque and the second sliding torque, one of the first sliding torque and the second sliding torque is a larger torque than the other, and the first rotating body and the second rotating body are in a state where they rotate relative to each other from a state where they do not rotate relative to each other to a state where they rotate relative to each other by a predetermined torsional angle or more in either the positive or negative direction, and in the process of further returning to the state where they do not rotate relative to each other, and also in the process of rotating relative to each other from a state where they do not rotate relative to each other to a state where they rotate relative to each other by the torsional angle in the other direction (positive or negative), and in the process of further returning to the state where they do not rotate relative to each other, it does not occur. A damper device.

2. The elastic mechanism portion includes a first elastic member and a pair of sheet members that sandwich and support the first elastic member from both sides, The damper device according to claim 1, wherein the radially extending portion abuts against either the first elastic member or one of the pair of sheet members.

3. The first sliding portion includes a first sliding surface that slides with respect to the first rotating body or the radially extending portion, and a second elastic member that biases the first sliding surface in a direction approaching the first rotating body or the radially extending portion. The damper device according to claim 1 or 2.

4. The second sliding portion includes a second sliding surface that slides with respect to the second rotating body or the radially extending portion, and a third elastic member that biases the second sliding surface in a direction approaching the second rotating body or the radially extending portion. The damper device according to claim 1 or 2.

5. The first sliding portion and the second sliding portion are integrally formed with the control plate and function as a part of the control plate. The first sliding portion and the second sliding portion slide directly with respect to the first rotating body and directly with respect to the second rotating body. The damper device according to claim 1 or 2.

6. A thrust member having at least one of a first surface that slides with respect to the first rotating body and a second surface that slides with respect to the second rotating body is further provided in a space on a side different from the space in which the control plate is disposed among the first accommodation space and the second accommodation space. The damper device according to any one of claims 1 to 5.

7. The damper device according to claim 6, wherein the thrust member has a fourth elastic member that biases the second surface in a direction approaching the second rotating body.

Images