Rotation device

Abstract

To inhibit wear of an inner peripheral end of a disc spring.SOLUTION: A disc spring 6 biases a friction member toward a second rotation body. The disc spring 6 has at least one first slit 61 and at least one second slit 62. The first slit 61 extends from an inner peripheral end to the radial outer side. The second slit 62 extends from the inner peripheral end to the radial outer side. A width of the second slit 62 is smaller than that of the first slit 61.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] A rotating device having a first and second rotating body that can rotate relative to one another is known. The rotating device exerts its function by the relative rotation of the first rotating body and the second rotating body. Examples of such a rotating device include a damper device and a clutch device.

[0003] For example, in the damper device described in Patent Document 1, a first rotor and a second rotor are elastically connected by an elastic member. A friction member and a disc spring are disposed between the first rotor and the second rotor in the axial direction to generate hysteresis torque. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-35363 A Summary of the Invention [Problem to be solved by the invention]

[0005] In a damper device having the above-mentioned configuration, depending on the conditions of use, the inner peripheral end of the disc spring may wear down due to friction with the first rotor, and the designed biasing force may not be exerted.

[0006] An object of the present invention is to suppress wear at the inner peripheral end of the disc spring. [Means for solving the problem]

[0007] A rotating device according to a first aspect includes a first rotating body, a second rotating body, a friction member, and a disc spring. The first rotating body is rotatably arranged. The second rotating body is rotatably arranged relative to the first rotating body. The friction member is arranged between the first rotating body and the second rotating body in the axial direction. The friction member is arranged to be rotatable relative to the second rotating body. The disc spring is arranged between the friction member and the first rotating body in the axial direction. The disc spring biases the friction member toward the second rotating body. The disc spring has at least one first slit and at least one second slit. The first slit extends radially outward from the inner circumferential end. The second slit extends radially outward from the inner circumferential end. The second slit has a width smaller than that of the first slit.

[0008] According to this configuration, instead of making all the slits in the disc spring the first slits, the second slits, which are narrower than the first slits, are formed. This increases the contact area between the inner peripheral end of the disc spring and the first rotating body, and thus reduces the surface pressure applied to the inner peripheral end of the disc spring. As a result, wear on the inner peripheral end of the disc spring can be suppressed.

[0009] A rotating device according to a second aspect is the rotating device according to the first aspect, wherein the first rotating body has a protruding portion. The protruding portion protrudes toward the second rotating body. The protruding portion abuts against the disc spring. The disc spring has an inner peripheral end disposed radially inward from the protruding portion. According to this configuration, since the inner peripheral end of the disc spring is disposed radially inward from the protruding portion, the protruding portion abuts against a portion of the disc spring that is radially outward from the inner peripheral end, and the inner peripheral end of the disc spring is not in contact with the first rotating body. As a result, the surface pressure acting on the inner peripheral end of the disc spring can be reduced, and wear of the inner peripheral end of the disc spring can be further suppressed.

[0010] A rotation device according to a third aspect is the rotation device according to the second aspect, and is configured as follows: the protrusion has a curved surface, and the disc spring abuts against the curved surface.

[0011] A rotation device according to a fourth aspect is the rotation device according to any one of the first to third aspects, and is configured as follows: The disc spring has a plurality of first slits and a plurality of second slits. The first slits and the second slits are alternately arranged in the circumferential direction.

[0012] A rotation device according to a fifth aspect is the rotation device according to any one of the first to fourth aspects, further comprising an elastic member. The elastic member elastically connects the first rotating body and the second rotating body. Effect of the Invention

[0013] According to the present invention, wear on the inner peripheral end of the disc spring can be suppressed. [Brief description of the drawings]

[0014] [Figure 1] FIG. [Diagram 2] Cross-sectional view of line II-II in Figure 1. [Diagram 3] FIG. [Figure 4] Front view of a disc spring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] [Overall configuration] Fig. 1 is a plan view of a damper device (an example of a rotating device) 100 according to this embodiment, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. In Fig. 2, line OO is the rotation axis of the damper device 100. In Fig. 2, an engine (not shown) is disposed on the left side of the damper device 100, and a drive unit (not shown) including an electric motor, a transmission, etc. is disposed on the right side.

[0016] In the following description, the axial direction is the direction in which the rotation axis O of the damper device 100 extends. The circumferential direction is the circumferential direction of a circle centered on the rotation axis O, and the radial direction is the radial direction of the circle centered on the rotation axis O. The circumferential direction does not have to completely coincide with the circumferential direction of the circle centered on the rotation axis O, and the radial direction does not have to completely coincide with the diameter direction of the circle centered on the rotation axis O.

[0017] 1 and 2, the damper device 100 is provided between an engine and an input shaft (not shown) of a drive unit. The damper device 100 is configured to damp rotation fluctuations. The damper device 100 has a first input plate 1 (an example of a first rotating body), a second input plate 2, a hub flange 3, a plurality of elastic members 4, a friction member 5, and a disc spring 6.

[0018] <First and second input plates> The first input plate 1 and the second input plate 2 are arranged to be rotatable around a rotation axis O. The first input plate 1 and the second input plate 2 rotate integrally with each other. In detail, the first input plate 1 and the second input plate 2 are fastened to each other by a plurality of first fastening members 101. The first fastening members 101 are, for example, rivets.

[0019] The first input plate 1 and the second input plate 2 are arranged at an interval from each other in the axial direction. The first input plate 1 and the second input plate 2 are immovable relative to each other in the axial direction. The first input plate 1 and the second input plate 2 are both annular members having a center hole.

[0020] The first input plate 1 has a plurality of first windows 11. In this embodiment, the first input plate 1 has four first windows 11. The first windows 11 are arranged in the circumferential direction.

[0021] The first input plate 1 has a protruding portion 12. The protruding portion 12 protrudes toward the second input plate 2. That is, the protruding portion 12 protrudes toward a flange plate 32, which will be described later. The protruding portion 12 extends in the circumferential direction. The protruding portion 12 is annular when viewed in the axial direction.

[0022] The first input plate 1 has a plurality of through holes 13. The through holes 13 are arranged in the circumferential direction. Each through hole 13 is formed in the protruding portion 12. That is, each through hole 13 and the protruding portion 12 are formed on the same circumference. The protruding portion 12 extends in the circumferential direction between adjacent through holes 13.

[0023] The second input plate 2 has a plurality of second window portions 21. In this embodiment, the second input plate 2 has four second window portions 21. The second window portions 21 are arranged in the circumferential direction. Each of the second window portions 21 is disposed at a position overlapping with each of the first window portions 11 when viewed in the axial direction.

[0024] <Hub flange 3> The hub flange 3 is disposed to be rotatable about a rotation axis O. The hub flange 3 is disposed to be rotatable relative to the first input plate 1 and the second input plate 2. The hub flange 3 is configured to transmit torque from the first and second input plates 1, 2 to a device on the output side.

[0025] The hub flange 3 has a hub 31 and a flange plate 32 (an example of a second rotating body). The hub 31 and the flange plate 32 are formed from separate members. A plurality of teeth formed on the outer circumferential surface of the hub 31 and a plurality of recesses formed on the inner circumferential surface of the flange plate 32 are meshed with each other to form an integrated unit. The hub 31 and the flange plate 32 may be integrally formed as a single member.

[0026] The hub 31 is cylindrical and is disposed within the central holes of the first input plate 1 and the second input plate 2. An axially extending spline hole is formed in the inner periphery of the hub 31. An input shaft, which is an output side member, can be spline-engaged with this spline hole.

[0027] The flange plate 32 extends in the radial direction from the outer circumferential surface of the hub 31. The flange plate 32 is formed in an annular shape. The flange plate 32 is disposed so as to be rotatable relative to the first input plate 1 and the second input plate 2.

[0028] The flange plate 32 is disposed between the first input plate 1 and the second input plate 2 in the axial direction. In addition, the flange plate 32 is disposed apart from the first input plate 1 and the second input plate 2 in the axial direction.

[0029] The flange plate 32 is formed in a disk shape. The flange plate 32 has a plurality of accommodating holes 321. In this embodiment, the flange plate 32 has four accommodating holes 321. The accommodating holes 321 are arranged in the circumferential direction. The accommodating holes 321 are arranged at positions overlapping with the first window portions 11 and the second window portions 21 when viewed in the axial direction.

[0030] The flange plate 32 has a central hole 322. The hub 31 extends through the central hole 322 of the flange plate 32. A plurality of teeth formed on the outer circumferential surface of the hub 31 mesh with a plurality of recesses formed on the inner wall surface that defines the central hole 322. This allows the hub 31 and the flange plate 32 to rotate together.

[0031] <Elastic material> The elastic member 4 is configured to elastically connect in the rotational direction the first and second input plates 1, 2 and the flange plate 32. The elastic member 4 is, for example, a coil spring.

[0032] The elastic member 4 is accommodated in the accommodation hole 321 of the flange plate 32. In addition, the elastic member 4 is accommodated in the first window portion 11 of the first input plate 1, and is also accommodated in the second window portion 21 of the second input plate 2.

[0033] <Friction materials> 2 and 3, the friction member 5 is disposed axially between the first input plate 1 and the flange plate 32. The friction member 5 is disposed so as to be rotatable relative to the flange plate 32. In detail, the friction member 5 has a friction material 51 on a surface that comes into contact with the flange plate 32. Therefore, a hysteresis torque is generated between the friction member 5 and the flange plate 32.

[0034] The friction member 5 is in the form of a plate having an opening in the center. The hub 31 extends through the opening of the friction member 5.

[0035] The friction member 5 has a plurality of protrusions 52. The protrusions 52 protrude toward the first input plate 1 and are inserted into the through holes 13 of the first input plate 1. Therefore, the friction member 5 rotates integrally with the first input plate 1.

[0036] <Disc spring> The disc spring 6 is disposed axially between the friction member 5 and the first input plate 1. An outer peripheral end 64 of the disc spring 6 abuts against the friction member 5, and an inner peripheral end 65 of the disc spring 6 abuts against the first input plate 1. The disc spring 6 biases the friction member 5 towards the flange plate 32.

[0037] As shown in FIG. 4, the coned disc spring 6 has a plurality of first slits 61 and a plurality of second slits 62. In this embodiment, the number of the first slits 61 and the number of the second slits 62 are the same, but may be different. The first slits 61 and the second slits 62 extend radially outward from the inner peripheral end of the coned disc spring 6. That is, the first slits 61 and the second slits 62 open radially inward. The first slits 61 and the second slits 62 are formed in the inner peripheral portion of the coned disc spring 6. The length of the first slits 61 is approximately the same as the length of the second slits 62. The lengths of the first slits 61 and the second slits 62 refer to the radial dimensions.

[0038] The first slits 61 and the second slits 62 are arranged alternately in the circumferential direction. The protrusions 52 of the friction member 5 are inserted into the through holes 13 via the first slits 61.

[0039] The width w2 of the second slit 62 is smaller than the width w1 of the first slit 61. The widths of the first slit 61 and the second slit 62 refer to the dimensions in the circumferential direction. The widths of the first slit 61 and the second slit 62 are measured at the inner circumferential end portions. Although not particularly limited, the width w2 of the second slit 62 can be, for example, about 10 to 50% of the width w1 of the first slit 61.

[0040] As shown in FIG. 3, an inner peripheral end 65 of the disc spring 6 abuts against the first input plate 1. In particular, the protruding portion 12 of the first input plate 1 abuts against the inner peripheral end 65 of the disc spring 6. The protruding portion 12 has a curved surface 121. The curved surface 121 may be formed by chamfering the corners of the protruding portion 12. The protruding portion 12 may be formed to have the curved surface 121 by pressing. The entire protruding portion 12 may be curved. The disc spring 6 abuts against this curved surface 121.

[0041] An inner peripheral end 63 of the disc spring 6 is disposed radially inward relative to the protruding portion 12. That is, the inner diameter d of the disc spring 6 is smaller than the inner diameter of the protruding portion 12. Therefore, the protruding portion 12 does not abut against the inner peripheral end 63 of the disc spring 6, but abuts against the disc spring 6 at a portion radially outward relative to the inner peripheral end 63 of the disc spring 6. The inner peripheral end 63 of the disc spring 6 is not in contact with the first input plate 1. The inner peripheral end 63 of the disc spring 6 is not in contact with other members either.

[0042] [Variations] The present invention is not limited to the above-described embodiments, and various modifications and alterations are possible without departing from the scope of the present invention.

[0043] (a) In the above embodiment, the inner circumferential end 63 of the disc spring 6 is disposed radially inward from the protruding portion 12 and is not in contact with the protruding portion 12. However, it may be in contact with the protruding portion 12.

[0044] (b) The damper device 100 according to this embodiment may be used in combination with a torque limiter unit, or may be used as a clutch device.

[0045] (c) The number, arrangement, length, etc. of the first slits 61 and the second slits 62 are not limited to those in the above embodiment.

[0046] (d) In the above embodiment, the first input plate 1 is an example of the first rotating body, and the flange plate 32 is an example of the second rotating body. However, the first input plate 1 may be the second rotating body, and the flange plate 32 may be the first rotating body. In this case, the friction member 5 is disposed so as to be rotatable relative to the first input plate 1. The disc spring 6 is disposed between the friction member 5 and the flange plate 32, and biases the friction member 5 toward the first input plate 1. The protrusion 12 is formed on the flange plate 32. [Explanation of symbols]

[0047] 1: First input plate 4: Elastic material 5: Friction material 6: Disc spring 61: First slit 62: Second slit 63: Inner edge 12:Protrusion 32: Flange plate 100: Damper device

Claims

1. A first rotor that is rotatably disposed; A second rotating body arranged to be rotatable relative to the first rotating body; a friction member disposed between the first rotor and the second rotor in an axial direction and rotatable relative to the second rotor; a disc spring disposed between the friction member and the first rotor in an axial direction and configured to bias the friction member toward the second rotor; Equipped with The disc spring is At least one first slit extending radially outward from the inner circumferential end; At least one second slit extending radially outward from the inner circumferential end and having a width smaller than that of the first slit; having Rotating device.

2. the first rotating body has a protruding portion protruding toward the second rotating body and coming into contact with the disc spring, The disc spring has an inner circumferential end disposed radially inward with respect to the protruding portion. The rotating device according to claim 1 .

3. The protrusion has a curved surface, The disc spring abuts against the curved surface. The rotating device according to claim 2 .

4. The disc spring has a plurality of the first slits and a plurality of the second slits, The first slits and the second slits are alternately arranged in the circumferential direction. The rotating device according to claim 1 .

5. Further comprising an elastic member that elastically connects the first rotating body and the second rotating body. The rotating device according to claim 1 .

Images