Damper Device

Abstract

To suppress wear of a sheet and a member supporting the sheet.SOLUTION: A damper device includes: a first rotor rotating around a rotary shaft; an intermediate member including a common support part and rotating to the first rotor around the rotary shaft; a first sheet supported by the common support part; a second sheet holding a first elastic body between the first sheet and supported by a first end surface; a third sheet holding the common support part between the first sheet and supported by the common support part; a fourth sheet holding a second elastic body between the third sheet and supported by a second end surface; and a second rotor including a first support part for supporting the second sheet and a second support part for supporting the fourth sheet, and rotating to the first rotor and the intermediate member around the rotary shaft. Due to that at least one of the sheets is rotated around a fulcrum contacting with a counterpart member, a contact surface having a cross section separated from the fulcrum by a second radius larger than a first radius and extending in a circular arc shape is slid to a contact surface of the counterpart member having a circular arc-shaped cross section separated from the fulcrum by the first radius.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The technology disclosed in the present application relates to a damper device that absorbs fluctuations in torque transmitted between a first rotating body and a second rotating body. [Background technology]

[0002] BACKGROUND ART Conventionally, a damper device that absorbs fluctuations in torque transmitted between a first rotating body (disc plate) and a second rotating body (hub) has been known.

[0003] In the damper device disclosed in Patent Document 1, the seat, which rotates due to centrifugal force, comes into contact with the protrusion of the hub, thereby preventing further rotation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-157964 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the damper device disclosed in Patent Document 1, if the area of ​​contact and sliding between the seat and hub, which rotate under centrifugal force, is not sufficiently secured, it is possible that the seat and hub may become worn due to such sliding.

[0006] Thus, various embodiments disclosed in this application provide a vibration damping device that at least partially prevents wear caused by sliding between a seat and a member supporting the seat. [Means for solving the problem]

[0007] A damper device according to one embodiment includes "a first rotating body including a circumferentially extending storage area and rotating around a rotation axis; a common support portion housed in the storage area and an intermediate member provided rotatably around the rotation axis relative to the first rotating body; a first seat housed in the storage area and supported by the common support portion; a second seat housed in the storage area, sandwiching a first elastic body between itself and the first seat and supported by a first end surface surrounding one end of the storage area; a third seat housed in the storage area, sandwiching the common support portion between itself and the first seat and supported by the common support portion; and a third seat housed in the storage area, sandwiching a second elastic body between itself and the third sheet and supported by a second end surface surrounding the other end of the storage area. The rotation mechanism may include a fourth seat, and a second rotating body including a first support portion supporting the second seat and a second support portion supporting the fourth seat, the second rotating body being rotatable around the rotation axis relative to the first rotating body and the intermediate member, wherein at least one target seat among the first seat, the second seat, the third seat, and the fourth seat rotates around a fulcrum, the fulcrum being a point at which the target seat abuts against a counter member supporting the at least one target seat, thereby causing a second contact surface, having a cross section extending in an arc from the fulcrum at a second radius greater than the first radius, to slide against a first contact surface of the counter member, having a cross section extending in an arc from the fulcrum at a first radius. [Effects of the Invention]

[0008] Various embodiments disclosed in this application can provide a vibration damping device that at least partially prevents wear caused by sliding between a seat and a member supporting the seat. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram illustrating an overview of a vibration damping device according to an embodiment. [Figure 2] 2 is a top view showing the configuration of the damper device shown in FIG. 1. FIG. [Figure 3]FIG. 2 is an exploded perspective view showing the configuration of the damper device shown in FIG. [Figure 4] 3 is an enlarged view schematically illustrating a configuration of a portion including a third sheet 434 in the damper device 10 illustrated in FIG. 2. FIG. [Figure 5A] 10 is an enlarged view schematically illustrating another example of the configuration of a portion including a third sheet 434 in the damper device 10 shown in FIG. 2. FIG. [Figure 5B] 10 is an enlarged view schematically illustrating yet another example of the configuration of a portion including a third sheet 434 in the damper device 10 shown in FIG. 2. FIG. [Figure 6] 10 is an enlarged view schematically illustrating yet another example of the configuration of a portion including a third sheet 434 in the damper device 10 shown in FIG. 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Various embodiments of the present invention will be described below with reference to the accompanying drawings. Note that common components in the drawings are designated by the same reference numerals. It should also be noted that components depicted in one drawing may be omitted in another drawing for the sake of clarity. It should also be noted that the accompanying drawings are not necessarily drawn to scale.

[0011] 1. Damper device configuration An outline of the configuration of a damper device according to one embodiment will be described with reference to Figs. 1 to 3. Fig. 1 is a perspective view that schematically shows an example of the configuration of a damper device according to one embodiment. Fig. 2 is a top view that shows the configuration of the damper device shown in Fig. 1. Fig. 3 is an exploded perspective view that shows the configuration of the damper device shown in Fig. 1.

[0012] The damper device 10 according to one embodiment can transmit driving force from a driving source such as an engine or a motor to a transmission by being sandwiched between a flywheel (not shown) and a pressure plate (not shown), for example. The structure for sandwiching the damper device 10 between the flywheel and the pressure plate is well known, and therefore a detailed description thereof will be omitted.

[0013] The damper device 10 can absorb and damp torsional vibrations. As shown in Figures 1 to 3, the damper device 10 includes a disc plate 100 as a first rotating body, a hub 200 as a second rotating body, an intermediate member 300, and an elastic mechanism 400 including a first elastic body 410 and a second elastic body 420.

[0014] 1-1. Hub 200 The hub 200 may be located on the output side of the power transmission path. Hub 200 is formed, for example, from a metal material, has a shape that extends generally in an annular shape as a whole, and can be provided to be rotatable about rotation axis O. As best shown in FIG. 3 , hub 200 can be spline-coupled to an input shaft (not shown) of a transmission (not shown) by inserting the input shaft into a through-hole 204 formed in a generally annular cylindrical portion 202.

[0015] The hub 200 may also have a plurality of flanges 206 extending radially from the cylindrical portion 202. As an example, as will be described later, the disc plate 100 has three storage areas 102 (102A, 102B, 102C), and accordingly, the hub 200 may have a total of three flanges 206 (206A, 206B, 206C) so that a total of two flanges 206 are located at both ends of each storage area.

[0016] 3, a notch 206A1 may be formed on one side (the right side in the drawing) of the flange 206A. This notch 206A1 can support the second sheet 432 of the elastic mechanism part 400 accommodated in the accommodation area 102A from the outside in the circumferential direction. This notch 206A1 can function as a "first support part" for the accommodation area 102A.

[0017] Meanwhile, a notch 206C2 may be formed on the other side (upper side in the drawing) of the flange 206C. This notch 206C2 can support the fourth sheet 436 of the elastic mechanism part 400 housed in the housing area 102A from the outside in the circumferential direction. This notch 206C2 can function as a "second support part" for the housing area 102A.

[0018] 3, a notch 206B1 may be formed on one side (upper side on the paper) of the flange 206B. This notch 206B1 can support the second sheet 432 of the elastic mechanism part 400 accommodated in the accommodation area 102B from the outside in the circumferential direction. This notch 206B1 can function as a "first support part" for the accommodation area 102B.

[0019] Meanwhile, a notch 206A2 may be formed on the other side (left side in the drawing) of the flange 206A. This notch 206A2 can support the fourth sheet 436 of the elastic mechanism part 400 housed in the housing area 102B from the outside in the circumferential direction. This notch 206A2 can function as a "second support part" for the housing area 102B.

[0020] 3, a notch 206C1 may be formed on one side (the top or bottom side of the drawing) of the flange 206C. This notch 206C1 can support the second sheet 432 of the elastic mechanism part 400 accommodated in the accommodation area 102C from the outside in the circumferential direction. This notch 206C1 can function as a "first support part" for the accommodation area 102C.

[0021] Meanwhile, a notch 206B2 may be formed on the other side (the top or bottom side of the drawing) of the flange 206B. This notch 206B2 can support the fourth sheet 436 of the elastic mechanism part 400 housed in the housing area 102C from the outside in the circumferential direction. This notch 206B2 can function as a "second support part" for the housing area 102C.

[0022] 1-2.Disc plate 100 The disc plate 100 may be disposed on the input side of the power transmission path. The disc plate 100 may be made of, for example, a metal material. As best shown in FIG. 3 , the disc plate 100 may be rotatable around a central axis O with the hub 200, the intermediate member 300, and the elastic mechanism 400 sandwiched therebetween.

[0023] The disc plate 100 may include a pair of members, a first disc plate 100A and a second disc plate 100B, which are provided on both axial sides of the hub 200 and the intermediate member 300. The second disc plate 100B may have a generally annular shape as a whole, and the first disc plate 100A may have a generally cylindrical shape as a whole.

[0024] The first disc plate 100A and the second disc plate 100B may be joined near their outer peripheries by a plurality of rivets or the like. The first disc plate 100A and the second disc plate 100B may cooperate with each other to form at least one accommodation area 102, here, as an example, three accommodation areas 102A, 102B, and 102C. Each of these accommodation areas 102 may partially accommodate a set of elastic mechanism parts 400 (part of the set of elastic mechanism parts 400 may be exposed to the outside). To form such accommodation areas 102, the first disc plate 100A and the second disc plate 100B may have openings in portions corresponding to each accommodation area, as best shown in FIG. 3 .

[0025] The disc plate 100 can accommodate elastic mechanism parts 400 in each accommodation area 102. Specifically, as shown in Figures 1 to 3, the disc plate 100 can accommodate a set of elastic mechanism parts 400 in the accommodation area 102A, that is, a first elastic body 410, a first sheet 430 and a second sheet 432 arranged on both sides of the first elastic body 410, a second elastic body 420, and a third sheet 434 and a fourth sheet 436 arranged on both sides of the second elastic body 420.

[0026] Similarly, the disc plate 100 can accommodate the above-mentioned set of elastic mechanism parts 400 (first elastic body 410, first sheet 430 and second sheet 432 arranged on both sides of the first elastic body 410, second elastic body 420, and third sheet 434 and fourth sheet 436 arranged on both sides of the second elastic body 420) in each of the accommodation areas 102B and 102C.

[0027] Furthermore, the disc plate 100 can support two seats included in the elastic mechanism portion 400 housed in each housing region 102. First, let's focus on the housing region 102A. With reference to FIGS. 1 and 3, a first end face 104A1 surrounding one end of the housing region 102A (opening) in the first disc plate 100A can abut against the second seat 432 from the outer side in the circumferential direction and support the second seat 432. Similarly, a first end face 104B1 surrounding one end of the housing region 102A (opening) in the second disc plate 100B can abut against the second seat 432 from the outer side in the circumferential direction and support the second seat 432.

[0028] Furthermore, a second end face 104A2 surrounding the other end of the accommodation area 102A (opening) in the first disc plate 100A can abut against the fourth seat 436 from the outer side in the circumferential direction and support the fourth seat 436. Similarly, a second end face 104B2 surrounding the other end of the accommodation area 102A (opening) in the second disc plate 100B can abut against the fourth seat 436 from the outer side in the circumferential direction and support the fourth seat 436.

[0029] Next, attention will be focused on the accommodation area 102B. Referring to Figures 1 and 3, a first end face 106A1 surrounding one end of the accommodation area 102B (opening) in the first disc plate 100A can abut against the second seat 432 from the outer side in the circumferential direction and support the second seat 432. Similarly, a first end face 106B1 surrounding one end of the accommodation area 102B (opening) in the second disc plate 100B can abut against the second seat 432 from the outer side in the circumferential direction and support the second seat 432.

[0030] Furthermore, the second end face 106A2 surrounding the other end of the accommodation area 102B (opening) in the first disc plate 100A can abut against the fourth seat 436 from the outer side in the circumferential direction and support the fourth seat 436. Similarly, the second end face 106B2 surrounding the other end of the accommodation area 102B (opening) in the second disc plate 100B can abut against the fourth seat 436 from the outer side in the circumferential direction and support the fourth seat 436.

[0031] Next, attention will be focused on the accommodation area 102C. Referring to Figures 1 and 3, a first end face 108A1 surrounding one end of the accommodation area 102C (opening) in the first disc plate 100A can abut against the second seat 432 from the outer side in the circumferential direction and support the second seat 432. Similarly, a first end face 108B1 surrounding one end of the accommodation area 102C (opening) in the second disc plate 100B can abut against the second seat 432 from the outer side in the circumferential direction and support the second seat 432.

[0032] Furthermore, the second end face 108A2 surrounding the other end of the accommodation area 102C (opening) in the first disc plate 100A can abut against the fourth seat 436 from the outer side in the circumferential direction and support the fourth seat 436. Similarly, the second end face 108B2 surrounding the other end of the accommodation area 102C (opening) in the second disc plate 100B can abut against the fourth seat 436 from the outer side in the circumferential direction and support the fourth seat 436.

[0033] 1-3. Intermediate member 300 The intermediate member 300 may be formed of, for example, a metal material or a resin material. As best shown in FIG. 3 , the intermediate member 300 may be provided rotatably with respect to the disc plate 100 and the hub 200 around the central axis O, with the hub 200 sandwiched therebetween.

[0034] The intermediate member 300 may include, for example, two annular members, a first member 300A and a second member 300B, which have substantially the same shape. Each of the first member 300A and the second member 300B may include an annular member 302 and a plurality of flange portions 304 protruding radially from the annular member 302. Corresponding to the fact that the disc plate 100 has three accommodation regions 102, each of the first member 300A and the second member 300B may have three flange portions 304 as the plurality of flange portions 304.

[0035] The first member 300A and the second member 300B are joined by rivets or the like with the hub 200 sandwiched between them and the flange portions 304 facing each other, thereby forming the intermediate member 300 as a whole.

[0036] The three flange portions 304 of the intermediate member 300 may each be provided to correspond to one of the three accommodation regions 102. As best shown in FIG. 2, the first flange portion 304A may be provided to correspond to the accommodation region 102A, and similarly, the second flange portion 304B and the third flange portion 304C may be provided to correspond to the accommodation region 102B and the accommodation region 102C, respectively.

[0037] The first flange portion 304A is provided between the first sheet 430 and the third sheet 434 accommodated in the accommodation area 102A, and can function as a support portion (common support portion) that supports the first sheet 430 and the third sheet 434. Similarly, the second flange portion 304B (third flange portion 304C) is provided between the first sheet 430 and the third sheet 434 accommodated in the accommodation area 102B (accommodation area 103C), and can function as a support portion (common support portion) that supports the first sheet 430 and the third sheet 434. The specific configurations of the first flange portion 304A to the third flange portion 304C (the flange portions 304A to the third flange portion 304C can have the same configuration as one another) will be described later.

[0038] 1-4. Elastic mechanism part 400 As best shown in Figure 2, a set of elastic mechanism parts 400 partially accommodated in each accommodation area 102 may include, as described above, a first elastic body 410, a first sheet 430 and a second sheet 432 arranged on either side of the first elastic body 410 and supporting the first elastic body 400, a second elastic body 420, and a third sheet 434 and a fourth sheet 436 arranged on either side of the second elastic body 420 and supporting the second elastic body 420.

[0039] In a typical example, the set of elastic mechanism parts 400 housed in each of the plurality of housing areas 102 may have the same configuration. Therefore, although attention is focused here only on the set of elastic mechanism parts 400 housed in housing area 102A, the configuration of the set of elastic mechanism parts 400 housed in each of housing area 102B and housing area 102C may be the same as the configuration of the set of elastic mechanism parts 400 housed in housing area 102A.

[0040] The first elastic body 410 and the second elastic body 420 may each be formed from a metal material and extend in a spiral shape from one end to the other end.

[0041] Each of the first sheet 430, the second sheet 432, the third sheet 434, and the fourth sheet 436 may be formed from, for example, a resin material or a metal material.

[0042] As best shown in FIG. 2, the first seat 430 may have a generally L-shaped cross section. This shape allows the first seat 430 to abut against one end 412 of the first elastic body 410 and support the one end 412 from the circumferential and radial outer sides. Furthermore, the first seat 430 may have an engaging portion 430a on the side opposite the one end 412 of the first elastic body 410 that engages with the first flange portion 304A of the intermediate member 300 and is supported by the first flange portion 304A. The specific configuration of the engaging portion 430a (a shape symmetrical to the engaging portion 434a with respect to the first flange portion 304A) will be described later.

[0043] The second seat 432 may have a generally L-shaped cross section. This shape allows the second seat 432 to abut against the other end 414 of the first elastic body 410 and support the other end 414 from the circumferential and radial outer sides. Furthermore, the second seat 432 may have an engagement portion 432a on the side opposite the other end 414 of the first elastic body 410 that engages with and is supported by the first end surface 104A1 (104B1) of the disc plate 100. Although not shown in FIG. 2, the engagement portion 432a may also be supported by the notch 206A1 (see FIG. 3) of the hub 200. The specific configuration of the engagement portion 432a will be described later.

[0044] The third sheet 434 may have a generally L-shaped cross section as a whole. This shape allows the third sheet 434 to abut against one end 422 of the second elastic body 420 and support this end 422 from the circumferential and radial outer sides. Furthermore, the third sheet 434 may have an engaging portion 434a on the side opposite to the one end 422 of the second elastic body 420 that engages with the first flange portion 304A of the intermediate member 300 and is supported by this first flange portion 304A. The specific configuration of the engaging portion 434a will be described later. The third sheet 434 may have a shape symmetrical to that of the first sheet 430.

[0045] The fourth seat 436 may have a generally L-shaped cross section. This shape allows the fourth seat 436 to abut against the other end 424 of the second elastic body 420 and support the other end 424 from the circumferential and radial outer sides. Furthermore, the fourth seat 436 may have an engagement portion 436a on the side opposite the other end 424 of the second elastic body 420 that engages with and is supported by the second end surface 104A2 (104B2) of the disc plate 100. Although not shown in FIG. 2, the engagement portion 436a may also be supported by a notch 206C2 (see FIG. 3) of the hub 200. The specific configuration of the engagement portion 436a will be described later. The fourth seat 436 may have a shape symmetrical to that of the second seat 432.

[0046] 2. Operation of the damper device 10 Next, a description will be given of the operation of the damper device 10 having the above configuration. Figures 1 and 3 show an initial state in which no driving force is transmitted to the damper device 10 from a driving source such as an engine or a motor, or a state in which no phase difference occurs between the disc plate 100 and the hub 200.

[0047] Power from a drive source such as an engine or a motor can be transmitted in the following order: disc plate 100, second seat 432, first elastic body 410, first seat 430, intermediate member 300, third seat 434, second elastic body 420, fourth seat 436, and hub 200. Focusing on the accommodation area 102A, the power is first transmitted from the first end surface 104A1 (104B1) of the disc plate 100 to the second seat 432. The second seat 432 transmits the power to the first seat 430 while deflecting the first elastic body 410. The first seat 430 transmits the power to the first flange portion 304A of the intermediate member 300. The first flange portion 304A transmits the power to the fourth seat 436 while deflecting the second elastic body 420 via the third seat 434. Ultimately, the fourth seat 436 can transmit such power to the hub 200 via the notch 206C2 in the hub 200.

[0048] Similarly to the receiving area 102B, the force can be transmitted from the first end surface 106A1 (106B1) of the disc plate 100 to the notch 206A2 of the hub 200 via a pair of elastic mechanisms 400 arranged in the receiving area 102B.

[0049] Similarly, in the accommodation area 102C, the force can be transmitted from the first end surface 108A1 (108B1) of the disc plate 100 to the notch 206B2 of the hub 200 via a set of elastic mechanisms 400 arranged in the accommodation area 102C.

[0050] On the other hand, when the torque transmitted to the disc plate 100 is positive (for example, during acceleration), the disc plate 100 can rotate counterclockwise relative to the hub 200, although this is not shown in FIGS. 1 and 3. As a result, the fourth seat 436 is pressed toward the third seat 434 by the second end surface 104A2 (104B2), and moves away from the notch 206C2 of the hub 200 against the second elastic body 420 and closer to the third seat 434. Furthermore, the first seat 430 moves closer to the second seat 432 against the first elastic body 410 due to being pressed by the third seat 434 and the first flange portion 304A of the intermediate member 300. Because the hub 200 is relatively stationary, the second seat 432 supported by the notch 206A1 of the hub 200 does not slide. Therefore, the first elastic body 410 and the second elastic body 420 contract, and the first end surface 104A1 (104B1) of the disc plate 100 loses support for the second sheet 432 and moves away from the second sheet 432.

[0051] Thereafter, the first elastic body 410 and the second elastic body 420 stretch to return to their original shapes, and the second sheet 432, biased by the first elastic body 410, presses the notch 206A1 of the hub 200 in the counterclockwise direction on the page. This causes the hub 200 to rotate counterclockwise, which in turn causes the input shaft of the transmission (not shown) to rotate.

[0052] Such an operation is similarly performed for the pair of elastic mechanism parts 400 arranged in each of the accommodation areas 102B and 102C.

[0053] On the other hand, when the torque transmitted to the disc plate 100 is negative (for example, when deceleration is occurring due to engine braking), although this is not shown in FIGS. 1 and 3 , the disc plate 100 can rotate clockwise relative to the hub 200. As a result, the second seat 432 is pressed toward the first seat 430 by the first end surface 104A1 (104B1), and moves away from the notch 206A1 of the hub 200 against the first elastic body 410 and closer to the first seat 430. Furthermore, the third seat 434 is pressed by the first seat 430 and the first flange portion 304A of the intermediate member 300, and moves closer to the fourth seat 436 against the second elastic body 420. Because the hub 200 is relatively stationary, the fourth seat 436 supported by the notch 206C2 of the hub 200 does not slide. Therefore, the first elastic body 410 and the second elastic body 420 contract, and the second end surface 104A2 (104B2) of the disc plate 100 loses support for the fourth sheet 436 and moves away from the fourth sheet 436.

[0054] Thereafter, the first elastic body 410 and the second elastic body 420 stretch to return to their original shapes, and the fourth sheet 436, biased by the second elastic body 420, presses the notch 206C2 of the hub 200 in the clockwise direction on the page. This causes the hub 200, which is rotating counterclockwise, to slow down, and ultimately the input shaft of the transmission (not shown) to slow down.

[0055] Such an operation is similarly performed for the pair of elastic mechanism parts 400 arranged in each of the accommodation areas 102B and 102C.

[0056] 3. Configuration and Operation of the First Sheet 430 and the Third Sheet 434 First, for convenience of explanation, attention will be focused on the third sheet 434. FIG. 4 is an enlarged schematic view showing a partial configuration including the third sheet 434 of the damper device 10 shown in FIG.

[0057] 4, the third sheet 434 can have an engaging portion 434a on the opposite side from the second elastic body 420. The engaging portion 434a can have a substantially inverted S-shaped cross section. The third sheet 434 can rotate around a fulcrum 434b, which is the point at which the third sheet 434 abuts against the first flange portion 304A of the intermediate member 300.

[0058] Furthermore, the engaging portion 434a may include a contact surface (second contact surface) 434a1 having a cross section extending in an arc shape separated from the fulcrum 434b by a radius (second radius) R2. Note that the radius R2 is greater than the radius R1, which will be described later.

[0059] Meanwhile, the first flange portion 304A of the intermediate member 300 may have an engaging portion 304a on a surface facing the third seat 434. The engaging portion 304a may have a substantially inverted S-shaped cross section that conforms to the engaging portion 434a of the third seat 434 to abut against and support the third seat 434 from the circumferentially outer side. The engaging portion 304a may also include a contact surface (first contact surface) 304a1 having a cross section that extends in an arc shape separated from the fulcrum 434b by a radius (first radius) R1. The radius R1 is smaller than the radius R2 described above. In a preferred example, the radius R1 is slightly smaller than the radius R2 described above (i.e., the radius R2 is slightly larger than the radius R1 to the extent that the third seat 434 can rotate; in other words, the radius R1 and the radius R2 are substantially the same).

[0060] 4, the fulcrum 434b is disposed radially outward of the second contact surface 434a1. That is, the distance between the second contact surface 434a1 and the rotation center of the damper device 10 is shorter than the distance between the fulcrum 434b and the rotation center of the damper device 10.

[0061] According to this configuration, the third sheet 434 is subjected to centrifugal force and can rotate counterclockwise around the fulcrum 434b against the second elastic body 420. Thereafter, the third sheet 434 is biased by the second elastic body 420 and can rotate clockwise around the fulcrum 434b. During this rotation, the second contact surface 434a1 of the third sheet 434 can slide relative to the first contact surface 304a1 of the engagement portion 304a. As a result, when the third sheet 434 rotates around the fulcrum 434b, the first contact surface 304a1 and the second contact surface 434a1, which have substantially the same radius of curvature, come into contact with each other and slide against each other. Therefore, the third sheet 434 can rotate with a stable behavior because the second contact surface 434a1 is supported by the first contact surface 304a1 over a larger area (rather than at a point). In this way, second contact surface 434a1 is supported by first contact surface 304a1 over a wider area (rather than at a point), which significantly reduces wear caused by sliding between second contact surface 434a1 and first contact surface 304a1, and furthermore, centrifugal force acting on third seat 434 is reliably received by first contact surface 304a1 via second contact surface 434a1. Therefore, third seat 434 can rotate with stable behavior.

[0062] In addition, in a preferred example, the third sheet 434 can have the following configuration. Fig. 5A is an enlarged schematic view showing another example of the configuration of a portion including the third sheet 434 in the damper device 10 shown in Fig. 2.

[0063] FIG. 5A shows, on the left, a partial configuration including the third sheet 434 and the like in an initial, unworn state, and, on the right, a partial configuration including the third sheet 434 and the like in a worn state.

[0064] 5A, the third seat 434 is provided such that, in the initial state, its outer edge 434c protrudes radially outward from the fulcrum 434b. In other words, the third seat 434 is provided such that, in the initial state, the distance between its outer edge 434c and the rotation center of the damper device 10 is greater than the distance between the fulcrum 434b and the rotation center of the damper device 10.

[0065] Focusing on the right side of FIG. 5A , the third sheet 434 can have the second contact surface 434a2, which has been worn away, facing the first contact surface 304a1 of the intermediate member 300 (first flange portion 304A). Even in this state, the third sheet 434 can rotate around the same fulcrum 434b as in the state shown on the left side of FIG. 5A . This allows the second contact surface 434a2 of the third sheet 434 to slide relative to the first contact surface 304a1, similar to the state shown on the left side of FIG. 5A . This allows the third sheet 434 to rotate with a stable behavior when rotating around the fulcrum 434b, because the second contact surface 434a2 is supported by the first contact surface 304a1 over a larger area (rather than at a point).

[0066] To clearly explain the effect of the configuration shown in Fig. 5A, Fig. 5B is a diagram illustrating, in an enlarged scale, still another example of the configuration of a portion of the damper device 10 shown in Fig. 2, including the third sheet 434.

[0067] FIG. 5B shows, on the left, a partial configuration including the third sheet 434 and the like in an initial, unworn state, and, on the right, a partial configuration including the third sheet 434 and the like in a worn state.

[0068] 5B, the third seat 434 is provided so that, in the initial state, its outer edge 434c' does not protrude radially outward from the fulcrum 434b', but is provided so that its outer edge 434c' is almost flush with the fulcrum 434b'. In other words, the third seat 434 is provided so that, in the initial state, the distance between its outer edge 434c' and the rotation center of the damper device 10 is almost the same as the distance between the fulcrum 434b' and the rotation center of the damper device 10. Here, the second contact surface 434a 11 is a contact surface having a cross section extending in an arc shape at a distance of a radius (second radius) R2 from the fulcrum 434b', and the first contact surface 304a1 is a contact surface having a cross section extending in an arc shape at a distance of a radius (first radius) R1 from the fulcrum 434b'.

[0069] Looking at the right side of FIG. 5B, the third sheet 434 has a second contact surface 434a 11 As a result of the wear, the second contact surface 434a 22 is placed against the first contact surface 304a1 of the intermediate member 300 (first flange portion 304A). In this state, the third sheet 434 rotates not around the fulcrum 434b' but around a different fulcrum 434b'' as shown on the left side of FIG. 5B. As a result, the second contact surface 434a 22 The second contact surface 434a1 is no longer a contact surface having a cross section extending in an arc away from the fulcrum 434b'' by the radius (second radius) R2, and the first contact surface 304a1 is no longer a contact surface having a cross section extending in an arc away from the fulcrum 434b'' by the radius (first radius) R1. Therefore, when the third sheet 434 rotates around the fulcrum 434b'', the second contact surface 434a1 rotates relative to the first contact surface 304a1. 22 It becomes difficult to slide smoothly.

[0070] Thus, the third sheet 434 employing the configuration shown in FIG. 5A can still rotate with stable behavior even after the second contact surface is worn, compared to the third sheet 434 employing the configuration shown in FIG. 5B.

[0071] Furthermore, in a preferred example, the third sheet 434 can have the following configuration: Fig. 6 is an enlarged schematic view showing yet another example of the configuration of a portion including the third sheet 434 in the damper device 10 shown in Fig. 2.

[0072] Figure 6 shows that the third sheet 434 is in a position (first position) that it will eventually reach by continuing to rotate around the fulcrum 434b in a first rotation direction (here, clockwise), i.e., the third sheet 434 is in a position (first position) that it will be placed in by being biased by the second elastic body 420 without resisting the second elastic body 420.

[0073] When such a third seat 434 continues to rotate in the second rotation direction (counterclockwise here) around the fulcrum 434b against the second elastic body 420 due to the centrifugal force, an outer edge 434d of the third seat 434 that is located farthest from the fulcrum 434b abuts against the wall surface that surrounds the storage area 102A of the disc plate 100, preventing the third seat 434 from continuing to rotate any further. In this way, the third seat 434 continues to rotate in the second rotation direction opposite to the first rotation direction, and reaches a final position (second position).

[0074] In a preferred example, the second contact surface 434a1 and the first contact surface 304a1 may be provided such that the second contact surface 434a1 always intersects a straight line L connecting the fulcrum 434b and the rotation center of the damper device 10 while the third seat 434 rotates between the first position and the second position. This causes the second contact surface 434a1 to intersect the straight line L (and consequently the first contact surface 304a1 opposite the second contact surface 434a1 also intersects the straight line L) while the third seat 434 is between the first position and the second position (i.e., always). In other words, the second contact surface 434a1 and the first contact surface 304a1 always exist in the direction of extension of the straight line L, which is the direction in which centrifugal force acts. Therefore, the centrifugal force acting on the third seat 434 is always supported by the first contact surface 304a1 via the second contact surface 434a1, and the third seat 434 can rotate with more stable behavior.

[0075] While the above description has focused on the third sheet 434, various configuration examples of the third sheet 434 can also be applied to the first sheet 430 (see FIG. 2) having a symmetrical shape with respect to the first flange portion 304A. In this case, the first flange portion 304A can have an engaging portion on the surface facing the first sheet 430, similar to the engaging portion 304a (configuration described above with reference to FIGS. 4 to 6) that is provided on the surface facing the third sheet 434. Here, the engaging portion that supports the first sheet 430 and the engaging portion 304a that supports the third sheet 434 can have symmetrical shapes. As a result, the first sheet 430 can rotate clockwise around a fulcrum when subjected to centrifugal force, and can rotate counterclockwise around the fulcrum when biased by the first elastic body 410.

[0076] 4. Configuration and Operation of Second Sheet 432 In a first example, the second seat 432 may have a generally L-shaped cross section as a whole, as best shown in FIG. 2. By having such a shape, as described above, the second seat 432 can abut against the other end 414 of the first elastic body 410 and support the other end 414 from the circumferentially outer side and the radially outer side. Furthermore, the second seat 432 may have an engagement portion 432a on the side opposite the other end 414 of the first elastic body 410 that engages with the first end surface 104A1 of the disc plate 100 and is supported by this first end surface 104A1. Although not shown in FIG. 2, this engagement portion 432a may also be supported by the notch 206A1 of the hub 200 (see FIG. 3).

[0077] In the second example, the second seat 432 may have the same configuration as the third seat 434 described above with reference to FIGS. 4 to 6. When the second seat 432 has such a configuration, the first end surface 104A1 of the disc plate 100 and the notch 206A1 of the hub 200, which support the second seat 432, may also have the same configuration (the same configuration as described above with reference to FIGS. 4 to 6) that the first flange portion 304A has to support the third seat 434. In this case, the second seat 432 rotates counterclockwise around the fulcrum upon receiving centrifugal force, and is biased by the first elastic body 410 to rotate clockwise around the fulcrum. This allows the second seat 432 to rotate in a stable manner, similar to the third seat 434 described above.

[0078] 5. Configuration and Operation of Fourth Sheet 436 In a first example, the fourth seat 436 may have a generally L-shaped cross section as a whole, as best shown in FIG. 2. By having such a shape, as described above, the fourth seat 436 can abut against the other end 424 of the second elastic body 420 and support the other end 424 from the circumferentially outer side and the radially outer side. Furthermore, the fourth seat 436 may have an engagement portion 436a on the side opposite the other end 424 of the second elastic body 420 that engages with the second end surface 104A2 of the disc plate 100 and is supported by this second end surface 104A2. Although not shown in FIG. 2, this engagement portion 436a may also be supported by the notch 206C2 (see FIG. 3) of the hub 200.

[0079] In the second example, the fourth seat 436 may have the same configuration as the first seat 430, which may have a symmetrical configuration to the third seat 434 described above with reference to FIGS. 4 to 6. When the fourth seat 436 has such a configuration, the second end surface 104A2 of the disc plate 100 and the notch 206C2 of the hub 200, which support the fourth seat 436, may also have the same configuration as the first flange portion 304A described above (the configuration described above with reference to FIGS. 4 to 6) for supporting the first seat 430. In this case, the fourth seat 436 rotates clockwise around the fulcrum when subjected to centrifugal force, and can rotate counterclockwise around the fulcrum when biased by the second elastic body 420. This allows the fourth seat 436 to rotate stably, similar to the third seat 434, the first seat 430, and the second seat 432 described above.

[0080] For convenience, the set of elastic mechanism parts 400 housed in housing area 102A and the related components have been described above with reference to Figures 4 to 6. However, this description can be similarly applied to the set of elastic mechanism parts 400 housed in housing area 102B (housing area 102C) and the related components.

[0081] 6. Variations In the various embodiments described above, the feature that a certain sheet rotates around a fulcrum, which is the point at which the sheet abuts against a mating member that supports the sheet, causes a second contact surface of the mating member, which has a cross-section extending in an arc from the fulcrum at a second radius greater than the first radius, to slide against a first contact surface of the mating member, which has a cross-section extending in an arc from the fulcrum at a first radius. has been described in detail with reference to the drawings.

[0082] This feature is applicable to at least one target sheet (and a counterpart member supporting this target sheet) among the first sheet 430, the second sheet 432, the third sheet 434, and the fourth sheet 436, which are arranged in one storage area (e.g., storage area 102A). Note that each sheet other than the target sheet may have any configuration, for example, a configuration similar to the second sheet 432 or the fourth sheet 436 shown in FIG. 2, or a configuration similar to the sheet disclosed in Patent Document 1.

[0083] Here, when the at least one target sheet includes the first sheet 430, the counterpart member that supports the first sheet 430 is the common support portion of the intermediate member 300 (the first flange portion 304A). When the at least one target sheet includes the second sheet 432, the opposing member supporting the second sheet 432 is the first end face 104A1 of the first rotating body (disc plate 100) and / or the first support portion (notch 206A1) of the second rotating body (hub 200). When the at least one target sheet includes the third sheet 434, the counterpart member that supports the third sheet 434 is the common support portion of the intermediate member 300 (the first flange portion 304A). When the at least one target sheet includes the fourth sheet 436, the counter member supporting the fourth sheet 436 is the second end surface 104A2 of the first rotating body (disc plate 100) and / or the second support portion (206C2) of the second rotating body (hub 200).

[0084] Furthermore, as would be easily understood by a person skilled in the art having the benefit of this disclosure, the various examples described above can be appropriately combined with each other in various patterns as long as no contradiction occurs.

[0085] 7. Various Aspects The damper device according to the first aspect includes "a first rotor including a circumferentially extending accommodation area and rotating around a rotation axis; a common support portion accommodated in the accommodation area and an intermediate member provided rotatably around the rotation axis relative to the first rotor; a first seat accommodated in the accommodation area and supported by the common support portion; a second seat accommodated in the accommodation area, sandwiching a first elastic body between itself and the first seat and supported by a first end surface surrounding one end of the accommodation area; a third seat accommodated in the accommodation area, sandwiching the common support portion between itself and the first seat and supported by the common support portion; and a third seat accommodated in the accommodation area, sandwiching a second elastic body between itself and the third sheet and supported by a second end surface surrounding the other end of the accommodation area. a fourth seat, a first support portion supporting the second seat, and a second support portion supporting the fourth seat, the second seat being rotatably provided around the rotation axis relative to the first rotating body and the intermediate member, wherein at least one target seat among the first seat, the second seat, the third seat, and the fourth seat rotates around a fulcrum at a point where the target seat abuts against a counter member supporting the at least one target seat, thereby causing a second contact surface, having a cross section extending in an arc from the fulcrum at a second radius greater than the first radius, to slide against a first contact surface of the counter member, having a cross section extending in an arc from the fulcrum at a first radius.

[0086] According to this configuration, the target sheet can rotate in a first rotation direction around the fulcrum against the elastic body by receiving centrifugal force, and then rotate in a second rotation direction around the fulcrum by being biased by the elastic body. When rotating in this manner, the target sheet can slide the second contact surface relative to the first contact surface. As a result, when the target sheet rotates around the fulcrum, the first contact surface and the second contact surface, which have approximately the same radius of curvature, come into contact and slide against each other. Therefore, the target sheet can rotate with stable behavior because the second contact surface is supported by the first contact surface over a larger area (rather than a point). In this way, because the second contact surface is supported by the first contact surface over a larger area (rather than a point), wear between the second contact surface and the first contact surface due to sliding can be significantly reduced. Furthermore, the centrifugal force acting on the target sheet is reliably received by the first contact surface via the second contact surface. Therefore, the target sheet can rotate with stable behavior.

[0087] The damper device according to the second aspect can adopt a configuration in which "when the at least one target sheet includes the first sheet, the opposing member supporting the first sheet is the common support portion of the intermediate member; when the at least one target sheet includes the second sheet, the opposing member supporting the second sheet is the first end face of the first rotating body and / or the first support portion of the second rotating body; when the at least one target sheet includes the third sheet, the opposing member supporting the third sheet is the common support portion of the intermediate member; and when the at least one target sheet includes the fourth sheet, the opposing member supporting the fourth sheet is the second end face of the first rotating body and / or the second support portion of the second rotating body."

[0088] According to this configuration, the at least one seat accommodated in the accommodation area can rotate with stable behavior while suppressing wear caused by sliding between the seat and the mating member of the seat.

[0089] The damper device according to the third aspect can employ a configuration in which "the distance between the second contact surface and the center of rotation of the damper device is smaller than the distance between the fulcrum and the center of rotation."

[0090] According to this configuration, the fulcrum is located radially outward from the second contact surface, so that the target sheet is subjected to centrifugal force and can rotate around the fulcrum and move radially outward.

[0091] The damper device according to the fourth aspect can adopt a configuration in which "the distance between the outer edge of the at least one target sheet and the center of rotation of the damper device is greater than the distance between the fulcrum and the center of rotation."

[0092] According to this configuration, the target seat can still rotate with stable behavior even after the second contact surface is worn.

[0093] The damper device according to the fifth aspect can adopt a configuration in which "while the at least one target sheet rotates around the fulcrum between a first position that the target sheet will ultimately reach by continuing to rotate in a first rotational direction and a second position that the target sheet will ultimately reach by continuing to rotate in a second rotational direction opposite to the first rotational direction, the second contact surface intersects with a straight line connecting the fulcrum and the center of rotation of the damper device."

[0094] According to this configuration, the centrifugal force acting on the target seat is always supported by the first contact surface via the second contact surface, so the target seat can rotate with more stable behavior. [Explanation of symbols]

[0095] 10 Damper device O Rotation axis L straight line 100 disc plate 100A First disc plate 100B Second disc plate 102, 102A, 102B, 102C Containment Area 104A1, 104B1, 106A1, 106B1, 108A1, 108B1 first end surface 104A2, 104B2, 106A2, 106B2, 108A2, 108B2 second end surface 200 Hub 206, 206A, 206B, 206C flanges 206A1, 206A2, 206B1, 206B2, 206C1, 206C2 notch 300 Intermediate parts 304 flange 304A First flange part (common support part) 304B Second flange part (common support part) 304C Third flange part (common support part) 304a Engagement part 304a1 contact surface (1st contact surface) R1 radius (1st radius) 400 Elastic mechanism 410 First Elastic Body 420 Third Elastic Body 430 1st Sheet 434a Engagement part 434a1, 434a2 second contact surface R2 radius (second radius) 434b Fulcrum 434c, 434d outer edge 432 2nd Sheet 434 3rd Sheet 436 4th Sheet

Claims

1. a first rotating body including a circumferentially extending storage area and rotating around a rotation axis; an intermediate member including a common support portion accommodated in the accommodation region and rotatable around the rotation axis relative to the first rotating body; a first seat accommodated in the accommodation area and supported by the common support portion; a second sheet that is accommodated in the accommodation area, sandwiches a first elastic body between the first sheet and the second sheet, and is supported by a first end surface that surrounds one end of the accommodation area; a third sheet that is accommodated in the accommodation area, sandwiches the common support portion between the third sheet and the first sheet, and is supported by the common support portion; a fourth sheet that is accommodated in the accommodation area, sandwiches a second elastic body between the fourth sheet and the third sheet, and is supported by a second end surface that surrounds the other end of the accommodation area; a second rotating body including a first support portion that supports the second seat and a second support portion that supports the fourth seat, the second rotating body being rotatable around the rotation axis relative to the first rotating body and the intermediate member; Equipped with At least one target sheet among the first sheet, the second sheet, the third sheet, and the fourth sheet, By rotating the at least one target sheet around a fulcrum at a point where the target sheet abuts against a counter member that supports the at least one target sheet, a second contact surface having a cross section extending in an arc shape away from the fulcrum by a second radius that is the same as the first radius is slid against a first contact surface of the mating member having a cross section extending in an arc shape away from the fulcrum by a first radius, In an initial state in which the second contact surface is not worn, an outer edge of the at least one target sheet is provided so as to protrude radially outward from the fulcrum relative to the rotation axis. Damper device.

2. When the at least one target sheet includes the first sheet, the counterpart member that supports the first sheet is the common support portion of the intermediate member, when the at least one target sheet includes the second sheet, the counter member supporting the second sheet is the first end surface of the first rotating body and / or the first support portion of the second rotating body, When the at least one target sheet includes the third sheet, the counterpart member that supports the third sheet is the common support portion of the intermediate member, The damper device of claim 1, wherein when the at least one target sheet includes the fourth sheet, the opposing member supporting the fourth sheet is the second end surface of the first rotating body and / or the second support portion of the second rotating body.

3. 3. The damper device according to claim 1, wherein a distance between the second contact surface and a rotation center of the damper device is smaller than a distance between the fulcrum and the rotation center.

4. The damper device according to claim 1 or 2, wherein a distance between an outer edge of the at least one target sheet and a rotation center of the damper device is greater than a distance between the fulcrum and the rotation center.

5. 3. A damper device as described in claim 1 or claim 2, wherein while the at least one target sheet rotates around the fulcrum between a first position that it ultimately reaches by continuing to rotate in a first rotational direction and a second position that it ultimately reaches by continuing to rotate in a second rotational direction opposite to the first rotational direction, the second contact surface intersects a straight line connecting the fulcrum and the center of rotation of the damper device.

Images