Rotating body

Abstract

To restrain damage to an elastomer member.SOLUTION: A rotating body 3 comprises a first rotating member 5, a second rotating member 6, an elastomer member 8, and a first relief space 10. The first rotating member 5 comprises a first tooth 53. The second rotating member 6 is arranged so as to be rotatable relatively to the first rotating member 5. The second rotating member 6 comprises a second tooth 63. The second tooth 63 is opposed to the first tooth 53 at an interval in a circumferential direction. The elastomer member 8 is opposed to the first tooth 53 in the circumferential direction. The elastomer member 8 rotates together with the second rotating member 6. The elastomer member 8 protrudes to the side of the first tooth 53 with respect to the second tooth 63. The first relief space 10 is formed between an end part of the second tooth 63 on the side of the first tooth 53 and the elastomer member 8.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] The damper device has an input rotor and an output rotor. The output rotor is divided into a hub and a flange plate. The hub and flange plate each have teeth that mesh with each other. Specifically, the hub has external teeth, and the flange plate has internal teeth. When torque is transmitted from the flange plate to the hub, the teeth of the flange plate collide with the teeth of the hub, generating a collision noise.

[0003] To suppress this impact noise, for example, in Patent Document 1, the output rotor has a rubber member. This rubber member abuts against the teeth of the hub before the teeth of the flange plate abut against the teeth of the hub. Then, the teeth of the flange plate abut against the teeth of the hub after the rubber member abuts against them. This suppresses the generation of the impact noise. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Chinese Utility Model No. 203685979 Summary of the Invention [Problem to be solved by the invention]

[0005] In the damper device as described above, there is a risk that the rubber member may be pinched between the teeth of the flange plate and the teeth of the hub, resulting in damage to the rubber member. Elastomer material The purpose of this is to prevent damage to the [Means for solving the problem]

[0006] A rotating body according to one aspect of the present invention comprises a first rotating member, a second rotating member, an elastomeric member, and a first relief space. The first rotating member has first teeth. The first rotating member is rotatably arranged. The second rotating member is rotatably arranged relative to the first rotating member. The second rotating member has second teeth. The second teeth are circumferentially opposed to the first teeth with a gap therebetween. The elastomeric member is circumferentially opposed to the first teeth. The elastomeric member is arranged to rotate together with the second rotating member. The elastomeric member protrudes toward the first teeth relative to the second teeth. The first relief space is formed between an end of the second tooth on the first tooth side and the elastomeric member.

[0007] The rotating body configured as described above has a first relief space between the end of the second tooth and the elastomer member. Therefore, the portion of the elastomer member that is deformed by contact with the first tooth is in the first relief space. space In other words, it is possible to prevent the deformed portion of the elastomer member from moving between the first tooth and the second tooth. As a result, it is possible to prevent the elastomer member from being pinched between the first tooth and the second tooth and being damaged.

[0008] Preferably, the elastomeric member has a first tapered surface extending away from the second tooth, and the first relief space is defined by the first tapered surface and the second tooth.

[0009] Preferably, the rotating body further includes a support member that supports the elastomer member, the elastomer member being disposed between the support member and the second tooth.

[0010] Preferably, the rotating body further includes a second escape space. The elastomer member is disposed between the support member and the second tooth in the first direction. The second escape space is disposed between the support member and the elastomer member and overlaps with the first escape space when viewed in the first direction.

[0011] Preferably, the elastomeric member has a second tapered surface extending away from the support member, the second relief space being defined by the second tapered surface and the support member.

[0012] Preferably, the second relief space is larger than the first relief space. [Effects of the Invention]

[0013] According to the present invention, damage to the elastomer member can be prevented. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. [Figure 2] Cross-sectional view of line II-II in Figure 1. [Figure 3] Front view of the hub flange. [Figure 4] Cross-sectional view of line IV-IV in Figure 3. [Figure 5] Front view of the hub flange with the flange plate removed. [Figure 6] Detailed view of the first and second relief spaces. [Figure 7] Detailed view of the first and second relief spaces. [Figure 8] Detail view showing the elastomeric member after deformation. [Figure 9] FIG. 10 is a detailed view of first and second relief spaces according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0015] A damper device having a hub flange according to this embodiment will be described below with reference to the drawings. In the following description, the axial direction refers to the direction in which the rotation axis of the hub flange extends. The circumferential direction refers to the circumferential direction of a circle centered on the rotation axis, and the radial direction refers to the radial direction of a circle centered on the rotation axis.

[0016] 1 and 2, the damper device 100 is provided between a flywheel (not shown) and an input shaft of a drive unit. The damper device 100 is configured to damp rotation fluctuations of an engine. The damper device 100 has a clutch disc 1, an input rotor 2, a hub flange 3 (an example of a rotor), and an elastic member 4.

[0017] [Clutch disc] The clutch disc 1 is attached to the outer peripheral end of the input rotor 2. The clutch disc 1 has an annular cushioning plate 11 and first and second facing discs 12a, 12b. The cushioning plate 11 is attached to the outer peripheral end of the input rotor 2. More specifically, the cushioning plate 11 is attached to the outer peripheral end of the first input plate 21.

[0018] <Input rotor 2> The input rotor 2 is rotatably arranged. The input rotor 2 has a first input plate 21 and a second input plate 22. The first input plate 21 and the second input plate 22 are both annular members having a center hole. The first input plate 21 and the second input plate 22 have substantially the same configuration.

[0019] The first input plate 21 and the second input plate 22 are fixed to each other at a predetermined interval in the axial direction by a plurality of stop pins 23. Therefore, the first input plate 21 and the second input plate 22 cannot move relative to each other in the axial direction and the rotational direction.

[0020] The first input plate 21 has a plurality of window portions 211. The window portions 211 are arranged in the circumferential direction. The window portions 211 are formed by cutting and raising the first input plate 21. The second input plate 22 has a plurality of window portions 221 similar to the window portions 211 of the first input plate 21.

[0021] <Hub flange 3> The hub flange 3 is a member for transmitting torque from the input rotor 2 to an output device. The hub flange 3 has a hub 5 (an example of a first rotating member), a flange plate 6 (an example of a second rotating member), a support member 7, a plurality of elastomer members 8, and a plurality of coil springs 9.

[0022] The hub 5 is rotatably disposed. The hub 5 is a cylindrical member. Specifically, the hub 5 has a cylindrical portion 51, a flange portion 52, and a plurality of first teeth 53.

[0023] The cylindrical portion 51 extends in the axial direction. The cylindrical portion 51 is disposed within the central holes of the first input plate 21 and the second input plate 22. The cylindrical portion 51 has a spline hole 511 extending in the axial direction. An output side member can be spline-fitted into this spline hole 511. For example, an input shaft of a transmission or the like can be spline-fitted.

[0024] The flange portion 52 extends radially outward from the outer circumferential surface of the cylindrical portion 51. The flange portion 52 is annular. The flange portion 52 is disposed between the first input plate 21 and the second input plate 22 in the axial direction.

[0025] As shown in Fig. 3, the hub 5 has a plurality of first teeth 53 on its outer periphery. In this embodiment, the hub 5 has four first teeth 53. The first teeth 53 protrude radially outward from the flange portion 52. In other words, the first teeth 53 are external teeth. The first teeth 53 are arranged in the circumferential direction.

[0026] The hub 5 has a pair of first accommodating recesses 54. The first accommodating recesses 54 are formed in the flange portion 52. More specifically, the first accommodating recesses 54 are portions recessed radially inward from the outer circumferential surface of the flange portion 52. The first accommodating recesses 54 extend in the circumferential direction. The pair of first accommodating recesses 54 are arranged on opposite sides to each other in the circumferential direction. Two first teeth 53 are arranged between the pair of first accommodating recesses 54.

[0027] As shown in FIG. 2 , the flange plate 6 is rotatably arranged. The flange plate 6 is arranged to be rotatable relative to the hub 5 within a predetermined angular range. The flange plate 6 is disk-shaped. The flange plate 6 is arranged axially between the first input plate 21 and the second input plate 22. The flange plate 6 has an opening 61 in its center. The hub 5 is arranged within this opening 61. In other words, the flange plate 6 is arranged radially outward from the hub 5.

[0028] As shown in Fig. 3, the flange plate 6 has a plurality of accommodating holes 62 on its outer periphery. In this embodiment, the flange plate 6 has four accommodating holes 62 on its outer periphery. The accommodating holes 62 are arranged in the circumferential direction. The accommodating holes 62 extend in the circumferential direction. The accommodating holes 62 penetrate the flange plate 6 in the axial direction. The elastic member 4 is accommodated in the accommodating holes 62.

[0029] The flange plate 6 has a plurality of second teeth 63. The second teeth 63 extend radially inward from the inner circumferential surface of the flange plate 6. In other words, the second teeth 63 are internal teeth. The second teeth 63 are configured to mesh with the first teeth 53. Torque is transmitted between the hub 5 and the flange plate 6 by the meshing of the first teeth 53 and the second teeth 63.

[0030] The second teeth 63 face the first teeth 53 at a distance in the circumferential direction. In particular, when the hub flange 3 rotates in a first rotational direction R1 (counterclockwise in FIG. 3) by torque transmitted from a drive source (e.g., an engine or an electric motor), the second teeth 63 are spaced apart from the first teeth 53 in the first rotational direction R1. The second teeth 63 are disposed on the side of the first teeth 53 in the second rotational direction R2.

[0031] Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3. As shown in Fig. 4, the second teeth 63 face the first teeth 53 in the circumferential direction. The second teeth 63 are arranged at a distance from the first teeth 53 in the circumferential direction. The tooth width of the second teeth 63 is smaller than the tooth width of the first teeth 53. Note that the tooth width of each tooth 53, 63 refers to the dimension in the axial direction.

[0032] As shown in Fig. 3, the flange plate 6 has a pair of second accommodating recesses 64. The second accommodating recesses 64 accommodate coil springs 9 in cooperation with the first accommodating recesses 54. The pair of coil springs 9 are arranged on opposite sides of the rotation axis O. The pair of coil springs 9 elastically connect the hub 5 and the flange plate 6 in the rotational direction.

[0033] The coil spring 9 extends in the circumferential direction. One end face of the coil spring 9 is disposed so as to abut against both the circumferential end face of the first accommodating recess 54 and the circumferential end face of the second accommodating recess 64. The other end face of the coil spring 9 is disposed so as to abut against both the circumferential end face of the first accommodating recess 54 and the circumferential end face of the second accommodating recess 64.

[0034] The coil spring 9 is arranged, for example, in a compressed state. The coil spring 9 operates until the second tooth 63 of the flange plate 6 abuts against the first tooth 53 of the hub 5. The coil spring 9 has lower rigidity than the elastic member 4. Therefore, the coil spring 9 operates in a region where the torsion angle between the input rotor 2 and the hub flange 3 is small, and after the operation of the coil spring 9 stops, the elastic member 4 operates in a region where the torsion angle is large.

[0035] As shown in FIG. 4, the support member 7 is attached to the flange plate 6. For example, the support member 7 has a plurality of protrusions 71, and the flange plate 6 has a plurality of holes 65 (see FIG. 3). The support member 7 is attached to the flange plate 6 by fitting each of the protrusions of the support member 7 into the holes of the flange plate 6. Therefore, the support member 7 rotates integrally with the flange plate 6.

[0036] 2, the support member 7 has an opening 72 in the center. The inner circumferential surface of the support member 7 abuts against the outer circumferential surface of the cylindrical portion 51 of the hub 5. The support member 7 is disposed between the first input plate 21 and the flange plate 6 in the axial direction.

[0037] 4 and 5, the support member 7 has an outer circumferential portion 73 and an inner circumferential portion 74. The outer circumferential portion 73 is in contact with the flange plate 6. On the other hand, the inner circumferential portion 74 is disposed with a gap between it and the flange plate 6 in the axial direction. The inner circumferential portion 74 is also disposed with a gap between it and the first tooth 53 in the axial direction.

[0038] The support member 7 has a protrusion 75 that extends in the axial direction from the inner periphery 74 toward the flange plate 6 .

[0039] The elastomer member 8 is made of, for example, rubber. The elastomer member 8 is supported by the support member 7. More specifically, the elastomer member 8 is attached to a protruding portion 75 of the support member 7. The elastomer member 8 has a through-hole formed in the center thereof that extends in the axial direction, and the protruding portion 75 is fitted into this through-hole.

[0040] The elastomer member 8 rotates integrally with the support member 7. Therefore, the elastomer member 8 rotates integrally with the flange plate 6. The elastomer member 8 is adjacent to the second tooth 63 in the axial direction. The elastomer member 8 may or may not be in contact with the second tooth 63.

[0041] The elastomer member 8 is disposed between the support member 7 and the flange plate 6 in the axial direction (an example of the first direction). More specifically, the elastomer member 8 is disposed between the inner periphery 74 of the support member 7 and the second tooth 63 of the flange plate 6.

[0042] The elastomer member 8 is disposed so as to face the first teeth 53 in the circumferential direction. Specifically, the elastomer member 8 is disposed so as to be spaced apart from the first teeth 53 in the first rotational direction R1. Note that the elastomer member 8 may be in contact with the first teeth 53.

[0043] The elastomer member 8 protrudes toward the first teeth 53 relative to the second teeth 63. That is, the distance between the elastomer member 8 and the first teeth 53 in the circumferential direction is shorter than the distance between the second teeth 63 and the first teeth 53. As shown in FIG. 3 , the tip end 83 of the elastomer member 8 does not overlap with the second teeth 63 when viewed in the axial direction. Therefore, when the flange plate 6 rotates in the first rotation direction R1, the elastomer member 8 comes into contact with the first teeth 53 before the second teeth 63 come into contact with the first teeth 53.

[0044] Fig. 6 is a partially enlarged view of Fig. 4. As shown in Fig. 6, a first escape space 10 is formed between an end 631 of each second tooth 63 on the first tooth 53 side, i.e., an end 631 of each second tooth 63 on the first rotation direction R1 side, and the elastomer member 8.

[0045] More specifically, the elastomer member 8 has a first tapered surface 81. The first tapered surface 81 faces the second teeth 63 in the axial direction. The first tapered surface 81 extends so as to move away from the second teeth 63 as it approaches the first teeth 53. Due to this first tapered surface 81, the elastomer member 8 gradually becomes thinner toward the first rotational direction R1. The thickness direction of the elastomer member 8 is along the axial direction.

[0046] By forming the first tapered surface 81, a space is formed between the elastomer member 8 and the second tooth 63. The space defined by the first tapered surface 81 and the second tooth 63 is the first escape space 10.

[0047] 7, the first escape space 10 can be, for example, the same size as the volume of a bisected portion 83a of the tip portion 83 of the elastomer member 8, or can be larger than the volume of the bisected portion 83a of the tip portion 83. The bisected portion 83a of the tip portion 83 is the portion on the second tooth 63 side of the two portions obtained by bisecting the tip portion 83 in the axial direction.

[0048] 6, a second escape space 20 is formed between the support member 7 and the elastomer member 8. The second escape space 20 overlaps with the first escape space 10 when viewed in the axial direction.

[0049] More specifically, the elastomer member 8 has a second tapered surface 82. The second tapered surface 82 faces the opposite side to the first tapered surface 81 in the axial direction. The second tapered surface 82 extends so as to move away from the support member 7 as it approaches the first tooth 53. That is, the second tapered surface 82 extends so as to gradually approach the first tapered surface 81 toward the first rotational direction R1. Due to this second tapered surface 82, the elastomer member 8 gradually becomes thinner toward the first rotational direction R1.

[0050] By forming the second tapered surface 82 in this manner, a space is formed between the elastomer member 8 and the support member 7. The space defined by this second tapered surface 82 and the support member 7 is the second escape space 20. In detail, the second escape space 20 is a portion of the space defined by the second tapered surface 82 and the support member 7 that overlaps with the second tooth 63 when viewed in the axial direction.

[0051] 7, the second escape space 20 can be the same size as the volume of a bisected portion 83b of the tip portion 83 of the elastomer member 8, or can be larger than the volume of the bisected portion 83b of the tip portion 83. The second escape space 20 may be larger than the first escape space 10, or may be the same size as the first escape space 10. The bisected portion 83b of the tip portion 83 is the portion on the support member 7 side of the two portions obtained by bisecting the tip portion 83 in the axial direction.

[0052] The operation of the hub flange 3 configured as described above will now be described. First, torque is transmitted to the flange plate 6, causing it to rotate in the first rotational direction R1. This causes the elastomer member 8 to come into contact with the first tooth 53. A load is then applied to the elastomer member 8, which deforms to fill the first and second relief spaces 10, 20, as shown in FIG. 8. As a result, the second tooth 63 comes into contact with the first tooth 53, and torque is transmitted to the hub 5. The elastomer member 8 deforms and is no longer pinched between the first tooth 53 and the second tooth 63, preventing damage to the elastomer member 8.

[0053] <Elastic member 4> As shown in Figure 1, the elastic member 4 elastically connects the input rotor 2 and the hub flange 3 in the rotational direction. The elastic member 4 is, for example, a coil spring. The elastic member 4 is housed in the housing hole 62 of the flange plate 6. The elastic member 4 is supported in the axial and radial directions by the windows 211, 221 of the first input plate 21 and the second input plate 22.

[0054] [Variations] Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications are possible without departing from the spirit of the present invention.

[0055] (a) In the above embodiment, the elastomer member 8 is supported by the support member 7, but this is not limiting. For example, the elastomer member 8 may be supported by the flange plate 6. Specifically, instead of the protrusion 75 formed on the support member 7, the flange plate 6 may have a protrusion that extends axially toward the support member 7. The elastomer member 8 may then be attached to this protrusion of the flange plate 6.

[0056] (b) In the above embodiment, the first escape space 10 and the second escape space 20 are formed by forming the first tapered surface 81 in the elastomer member 8, but the method of forming the first escape space 10 and the second escape space 20 is not limited to this. For example, as shown in Fig. 9, the first escape space 10 and the second escape space 20 may be formed by gradually thinning the elastomer member 8.

[0057] (c) In the above embodiment, the second teeth 63 and the elastomer member 8 are aligned with each other in the axial direction, but the configuration of the hub flange 3 is not limited to this. For example, the second teeth 63 and the elastomer member 8 may be aligned with each other in the radial direction. In this case, the elastomer member 8 is positioned between the support member 7 and the second teeth in the radial direction. The first escape space 10 is positioned between the elastomer member 8 and the second teeth 63 in the radial direction. The second escape space 20 is positioned between the support member 7 and the elastomer member 8, and overlaps with the first escape space 10 when viewed in the radial direction.

[0058] (d) In the above embodiment, the rotating body of the present invention is applied to the flange plate 6, but the rotating body of the present invention can also be applied to other plates besides the flange plate 6. [Explanation of symbols]

[0059] 3: Hub flange 5: Hub 53: First tooth 6: Flange plate 63: Second tooth 7: Support member 8: Elastomer material 81: First tapered surface 82: Second tapered surface 10: First relief space 20: Second relief space

Claims

1. a first rotating member having first teeth and rotatably disposed thereon; a second rotating member having second teeth that face the first teeth at an interval in the circumferential direction and that is arranged to be rotatable relative to the first rotating member; an elastomer member that faces the first tooth in the circumferential direction, is arranged to rotate together with the second rotating member, is arranged to be adjacent to the second tooth in the axial direction, and protrudes toward the first tooth relative to the second tooth; a first escape space formed axially between an end of the second tooth on the first tooth side and the elastomer member; A rotating body comprising:

2. the elastomeric member has a first tapered surface extending away from the second tooth; the first relief space is defined by the first tapered surface and the second tooth; The rotating body according to claim 1 .

3. a support member for supporting the elastomeric member; the elastomeric member is disposed between the support member and the second tooth. The rotating body according to claim 1 or 2.

4. Further provided with a second relief space, the elastomeric member is disposed between the support member and the second tooth in a first direction; the second relief space is disposed between the support member and the elastomer member and overlaps with the first relief space when viewed in the first direction; The rotating body according to claim 3 .

5. the elastomeric member has a second tapered surface extending away from the support member; the second relief space is defined by the second tapered surface and the support member. The rotating body according to claim 4.

6. The second relief space is larger than the first relief space. The rotating body according to claim 4 or 5.

7. A first rotating member having a first tooth and rotatably arranged; a second rotating member having second teeth that face the first teeth at an interval in the circumferential direction and that is arranged to be rotatable relative to the first rotating member; an elastomer member that faces the first teeth in the circumferential direction, that is disposed to rotate together with the second rotating member, and that protrudes toward the first teeth relative to the second teeth; a first escape space formed between an end of the second tooth on the first tooth side and the elastomer member; a support member that supports the elastomeric member; Equipped with the elastomeric member is disposed between the support member and the second tooth. Rotating body.

Images