Damper Device

Abstract

To provide a damper device suitable for a hybrid vehicle.SOLUTION: A damper device comprises an input member, an output member, a first coil spring and a first spring seat. The output member has a second spring accommodation part, a first face, a second face, and a first engagement part. The first face defines an end face of the second spring accommodation part at a rotation direction first side. The first engagement part is formed at the first face. The first coil spring has a first end face and a second end face. The first spring seat is arranged between the first face of the output member and the first end face of the first coil spring. The first spring seat has a holding part and a second engagement part. The holding part is inserted into the first coil spring. The second engagement engages with the first engagement part. The first engagement part has a first abutment face. The first abutment face is oriented to a radially inner side. The second engagement part has a second abutment face. The second abutment face is oriented to a radially outer side and is opposite the first abutment face.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] The damper device is composed of an input member, an output member, and a coil spring that elastically connects the output member and the input member in the rotational direction (see, for example, Patent Document 1). The coil spring is housed in a first spring housing portion formed in the input member and a second spring housing portion formed in the output member. When the input member and the output member rotate relative to each other, the coil spring is compressed in the rotational direction between the two members. This damper device absorbs and attenuates torsional vibrations in the rotational direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-320029 Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to install the above-described damper device in a hybrid vehicle equipped with an engine and an electric motor.

[0005] An object of the present invention is to provide a damper device suitable for hybrid vehicles. [Means for solving the problem]

[0006] The inventors have discovered the following problem: In hybrid vehicles, when the engine generates electricity, a constant torque is continuously input from the engine to the damper device. As a result, the end of the coil spring on the first side in the rotational direction continues to abut and slide at approximately the same position on the surface of the first spring housing portion facing radially inward, which makes the input member prone to localized wear.

[0007] (1) A damper device according to one aspect of the present invention rotates in a first direction of rotation due to torque input from an engine. The damper device includes an input member, an output member, a first coil spring, and a first spring seat. The input member has a first spring accommodating portion. The input member is rotatably arranged. The output member has a second spring accommodating portion, a first surface, a second surface, and a first engaging portion. The second spring accommodating portion is arranged at a position corresponding to the first spring accommodating portion. The first surface defines an end face of the second spring accommodating portion on a first side in the direction of rotation. The second surface defines an end face of the second spring accommodating portion on a second side in the direction of rotation. The second side in the direction of rotation is opposite to the first side in the direction of rotation. The first engaging portion is formed on the first surface. The output member is rotatably arranged relative to the input member. The first coil spring has a first end face and a second end face. The first end face faces the first side in the direction of rotation. The second end face faces the second side in the direction of rotation. The first coil spring is disposed in the first spring accommodating portion and the second spring accommodating portion. The first spring seat is disposed between a first surface of the output member and a first end surface of the first coil spring. The first spring seat has a retaining portion and a second engaging portion. The retaining portion is inserted into the first coil spring. The second engaging portion engages with the first engaging portion. The first engaging portion has a first abutment surface. The first abutment surface faces radially inward. The second engaging portion has a second abutment surface. The second abutment surface faces radially outward and faces the first abutment surface.

[0008] In a damper device configured as described above, when torque is input to the input member, the torque is transmitted to the output member via the first spring seat and the first coil spring. The torsional vibrations that occur at this time are absorbed and damped by the relative rotation of the input member and the output member, which causes the first coil spring to compress in the rotational direction. At this time, the first coil spring is sandwiched between the output member and the input member and compressed.

[0009] Here, the damper device includes a first spring seat at a portion where the end of the first coil spring in the rotational direction abuts against the input member, which is a portion of the input member prone to wear in a hybrid vehicle. The first coil spring is held by the first spring seat. The first engagement portion of the output member has a first abutment surface facing radially inward, and the second engagement portion of the first spring seat has a second abutment surface facing radially outward and opposing the first abutment surface. The abutment between the first abutment surface and the second abutment surface restricts radial movement of the first spring seat. As a result, even if the first coil spring remains compressed between the input member and the output member for a long period of time in a hybrid vehicle, the end of the first coil spring in the rotational direction abuts against the surface facing radially inward of the first spring housing. The first spring seat also does not move radially and abut against the input member. As a result, wear of the input member is prevented.

[0010] (2) Preferably, the first engagement portion is a recess including a first contact surface, and the second engagement portion includes a second contact surface.

[0011] (3) Preferably, the first spring seat has a pair of protrusions. The pair of protrusions are spaced apart from each other in the axial direction. The pair of protrusions extend toward a first side in the rotational direction. The pair of protrusions axially sandwich the output member.

[0012] According to this configuration, the first spring seat can also restrict the axial movement of the first coil spring.

[0013] (4) Preferably, the second end surface of the first coil spring abuts against the second surface of the output member. With this configuration, the first spring seat is not disposed at the end of the first coil spring on the second side in the rotational direction. In other words, the first spring seat is disposed only on the first side in the rotational direction of the second spring housing portion.

[0014] (5) Preferably, the damper device further includes a torsion damper, a second coil spring, and a second and third spring seats. The torsion damper absorbs torsional vibrations. The second coil spring has a third end face facing the first side in the rotational direction and a fourth end face facing the second side in the rotational direction. The input member has a third spring housing portion. The output member has a fourth spring housing portion, a third surface, and a fourth surface. The fourth spring housing portion is disposed at a position corresponding to the third spring housing portion. The third surface defines the end face of the fourth spring housing portion on the first side in the rotational direction. The fourth surface defines the end face of the fourth spring housing portion on the second side in the rotational direction. The torsion damper is disposed within the second coil spring. The second coil spring is disposed within the third and fourth spring housing portions. The second spring seat is disposed between the third surface of the output member and the third end face of the second coil spring. The third spring seat is disposed between the fourth surface of the output member and the fourth end surface of the second coil spring. [Effects of the Invention]

[0015] As described above, the present invention can provide a damper device suitable for hybrid vehicles. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a plan view of a damper device according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view of a damper device according to an embodiment of the present invention; [Figure 3] FIG. [Figure 4] Side view of the spring seat. [Figure 5] FIG. [Figure 6] FIG. 4 is a partially enlarged cross-sectional view of the hub flange and the spring seat. [Figure 7] FIG. 4 is a partial enlarged view of the damper device when torque is input from the engine. [Figure 8]FIG. 10 is a plan view of a damper device according to a modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] [Overall configuration] FIG. 1 is a plan view of a damper device 100 according to one embodiment of the present invention. The damper device 100 is mounted on a hybrid vehicle equipped with an engine (not shown) and an electric motor (not shown). FIG. 2 is a cross-sectional view of the damper device 100 according to one embodiment of the present invention. The damper device 100 rotates in a first rotational direction due to torque input from the engine. Arrow R1 in FIG. 1 indicates the first rotational direction side, and arrow R2 indicates the opposite second rotational direction side (the same applies to the following figures). An engine and a flywheel (not shown) are disposed on the left side of the damper device 100 in FIG. 2, and an electric motor and a transmission (not shown) are disposed on the right side of the damper device 100 in FIG. 2.

[0018] In the cross-sectional view of Figure 2, line OO is the axis of rotation. In the following description, unless otherwise specified, "axial direction" refers to the direction of the axis of rotation. Furthermore, "radial direction" refers to the radial direction of a circle centered on the axis of rotation O.

[0019] As shown in Figures 1 and 2, the damper device 100 is composed of an input member 2, an output member 3, a plurality of first coil springs 4, a plurality of second coil springs 9, a plurality of first spring seats 5, a plurality of second spring seats 7, a plurality of third spring seats 8, and a plurality of torsion dampers 6.

[0020] [Input member] The input member 2 is a member to which torque is input from a flywheel (not shown). The input member 2 is rotatably arranged. The input member 2 has a plurality of first spring housing portions 21 and a plurality of third spring housing portions 24. The input member 2 is made up of a first plate 22 and a second plate 23.

[0021] The first plate 22 and the second plate 23 are both annular members having a center hole. The first plate 22 and the second plate 23 are arranged at a predetermined distance from each other in the axial direction. The first plate 22 is arranged on the engine side, and the second plate 23 is arranged on the transmission side. The first plate 22 and the second plate 23 rotate integrally.

[0022] The first plate 22 and the second plate 23 each have a first spring accommodating portion 21. The first plate 22 and the second plate 23 further each have a third spring accommodating portion 24. In this embodiment, a pair of first spring accommodating portions 21 are arranged radially on either side of a center hole. In addition, a pair of third spring accommodating portions 24 are arranged radially on either side of a center hole. The first spring accommodating portion 21 and the third spring accommodating portion 24 are holes that penetrate in the axial direction.

[0023] [Output member] The output member 3 is a member for transmitting torque from the input member 2 to a transmission (not shown). The output member 3 is disposed so as to be rotatable relative to the input member 2.

[0024] As shown in Fig. 3, the output member 3 has a plurality of second spring housing portions 31 and a plurality of fourth spring housing portions 34. The output member 3 also has a hub 32 and a hub flange 33. The second spring housing portions 31 and the fourth spring housing portion 34 are disposed on the hub flange 33. The second spring housing portion 31 is disposed at a position corresponding to the first spring housing portion 21. The fourth spring housing portion 34 is disposed at a position corresponding to the third spring housing portion 24.

[0025] The hub 32 is a cylindrical member and is disposed within the central holes of the first plate 22 and the second plate 23. An input shaft (not shown) of the transmission is inserted into the central hole of the hub 32 and is spline-fitted into the central hole of the hub 32. The hub flange 33 is an annular member and is disposed radially outward from the hub 32.

[0026] The hub flange 33 is formed with second spring accommodating portions 31 for accommodating the first coil springs 4. The hub flange 33 is further formed with fourth spring accommodating portions 34 for accommodating the second coil springs 9. In this embodiment, two second spring accommodating portions 31 are formed at positions corresponding to the first spring accommodating portions 21. Two fourth spring accommodating portions 34 are formed at positions corresponding to the third spring accommodating portions 24.

[0027] The hub flange 33 has a first surface 331, a second surface 332, a third surface 334, and a fourth surface 335. The first surface 331 defines the end face of the second spring accommodating portion 31 on the first side in the rotational direction. The second surface 332 defines the end face of the second spring accommodating portion 31 on the second side in the rotational direction. The third surface 334 defines the end face of the fourth spring accommodating portion 34 on the first side in the rotational direction. The fourth surface 335 defines the end face of the fourth spring accommodating portion 34 on the second side in the rotational direction. The third surface 334 has a configuration similar to that of the first surface 331. The fourth surface 335 has a configuration similar to that of the first surface 331.

[0028] The hub flange 33 has a first engagement portion 333. The first engagement portion 333 is formed on a first surface 331. When viewed from above, the first engagement portion 333 is arc-shaped. The first engagement portion 333 is a recess that recesses toward a first side in the rotational direction. The recess includes a first abutment surface 3331. The first abutment surface 3331 faces radially inward.

[0029] The first surface 331 includes an incorrect assembly prevention surface 3332. The incorrect assembly prevention surface 3332 is formed radially inward from the first engaging portion 333. The incorrect assembly prevention surface 3332 is formed on the second rotational side of the surface that defines the first rotational side of the first engaging portion 333.

[0030] [First coil spring] As shown in FIG. 1, the first coil spring 4 is disposed in the first spring housing portion 21 and the second spring housing portion 31.

[0031] The first coil spring 4 has a first end face 41 facing a first side in the rotation direction and a second end face 42 facing a second side in the rotation direction. In the first spring housing portion 21 and the second spring housing portion 31, the second end face 42 abuts against the second surface 332 of the output member 3.

[0032] [Second coil spring] 1, the second coil spring 9 is disposed in the third spring housing portion 24 and the fourth spring housing portion 34. The second coil spring 9 has a third end face 91 facing the first side in the rotational direction, and a fourth end face 92 facing the second side in the rotational direction.

[0033] [Torsion damper] The torsion damper 6 absorbs torsional vibrations. The torsion damper 6 is disposed within the second coil spring 9. The torsion damper 6 is disposed within the third spring housing portion 24 and the fourth spring housing portion 34. The torsion damper 6 is not disposed in the first spring housing portion 21 or the second spring housing portion 31. When the second coil spring 9 is not compressed, both end faces of the torsion damper 6 are not in contact with the input member 2, the output member 3, the second spring seat 7, or the third spring seat 8.

[0034] [1st spring seat] The first spring seat 5 is disposed between the first surface 331 of the output member 3 and the first end surface 41 of the first coil spring 4. The first spring seat 5 is disposed on a first side in the rotation direction of the first spring housing portion 21 and the second spring housing portion 31. The first spring seat 5 is not disposed between the second surface 332 of the output member 3 and the second end surface 42 of the first coil spring 4 in the first spring housing portion 21 and the second spring housing portion 31.

[0035] The first spring seat 5 holds the end of the first coil spring 4 on the first side in the rotation direction so as to be immovable in the radial and axial directions. The material of the first spring seat 5 is a hard resin or elastic resin material.

[0036] As shown in FIGS. 4 and 5, the first spring seat 5 has a retaining portion 51, a second engaging portion 52, a pair of protruding portions 53, a pair of seating surface portions 54, and an incorrect assembly prevention portion 56.

[0037] The retaining portion 51 is inserted into the first coil spring 4. The retaining portion 51 holds the end portion of the first coil spring 4 on the first side in the rotation direction so that it cannot move in the radial or axial directions. The surface of the retaining portion 51 on the first side in the rotation direction abuts against the first surface 331 of the output member 3.

[0038] The holding portion 51 has a protrusion 511. The protrusion 511 extends in the second direction of rotation from an end face of the holding portion 51 on the second side in the rotation direction. The protrusion 511 has a surface that faces radially outward and is inclined so as to face the second side in the rotation direction.

[0039] The second engagement portion 52 extends from the end face of the holding portion 51 on the first rotational direction side toward the first rotational direction. When viewed in the axial direction, the second engagement portion 52 is arc-shaped. The axial length of the second engagement portion 52 is longer than the length of the output member 3 in the thickness direction. The base end of the second engagement portion 52 does not abut against the first surface 331. The second engagement portion 52 engages with the first engagement portion 333 of the output member 3.

[0040] 6, the second engagement portion 52 includes a second abutment surface 521. The second abutment surface 521 faces radially outward and faces the first abutment surface 3331 of the output member 3.

[0041] As shown in Figures 4 and 5, the pair of protrusions 53 extend from an end face of the holding portion 51 on the first rotational direction side toward the first rotational direction. The pair of protrusions 53 are arranged at a distance from each other in the axial direction. The second engaging portion 52 is arranged between the pair of protrusions 53. In other words, both axial ends of the second engaging portion 52 are connected to the pair of protrusions 53, respectively. The pair of protrusions 53 sandwich the output member 3 in the axial direction.

[0042] The pair of seating surfaces 54 respectively protrude radially outward from the outer circumferential surfaces of the pair of protrusions 53 relative to the pair of protrusions 53. The seating surfaces 54 support the first end surfaces 41 of the first coil springs 4.

[0043] The misassembly prevention portion 56 extends from the end face of the holding portion 51 on the first side in the rotational direction toward the first side. The misassembly prevention portion 56 is disposed radially inward relative to the second engaging portion 52. The misassembly prevention portion 56 abuts against a misassembly prevention surface 3332 formed on the first surface 331 of the output member 3. The misassembly prevention portion 56 ensures that the first spring seat 5 can be assembled to the output member 3 only in a direction in which the misassembly prevention portion 56 and the misassembly prevention surface 3332 mate. Specifically, the first spring seat 5 can be assembled to the output member 3 only in a direction in which the protrusion 511 faces radially outward. This prevents misassembly of the first spring seat 5.

[0044] [Second and third spring seats] The second spring seats 7 are arranged in the third spring housing portion 24 and the fourth spring housing portion 34. The second spring seats 7 are arranged between the third surface 334 of the output member 3 and the third end surface 91 of the second coil spring 9. This allows the second spring seats 7 to enable the torsion damper 6 to stably transmit the load. Other than the arrangement of the second spring seats 7, the configuration is the same as that of the first spring seats 5.

[0045] The third spring seat 8 is disposed in the third spring housing portion 24 and the fourth spring housing portion 34. The third spring seat 8 is disposed between the fourth surface 335 of the output member 3 and the fourth end surface 92 of the second coil spring 9. This enables the third spring seat 8 to stably transmit the load from the torsion damper 6. Other than the location of the third spring seat 8, the configuration is the same as that of the first spring seat 5.

[0046] [Action and effect] As shown in FIGS. 1 and 4 to 7 , when the input member 2 is twisted toward the first rotational direction relative to the hub flange 33, the first coil springs 4 are pressed by the input member 2 and compressed toward the first rotational direction within the first spring housing portion 21 and the second spring housing portion 31. The ends of the first coil springs 4 on the second rotational direction side are held in contact with the input member 2. Meanwhile, the ends of the first coil springs 4 on the first rotational direction side are separated from the input member 2 and come into contact only with the output member 3. The ends of the first coil springs 4 on the first rotational direction side further attempt to move radially outward from the first spring housing portion 21 of the input member 2 due to centrifugal force. In this embodiment, the ends of the first coil springs 4 on the first rotational direction side are held by the holding portion 51 of the first spring seat 5. The second engagement portion 52 of the first spring seat 5 engages with the first engagement portion 333 of the hub flange 33. As a result, even if a constant torque is continuously input from the engine to the damper device 100 in a hybrid vehicle, the end of the first coil spring 4 on the first side in the rotational direction will not come into contact with the surface facing radially inward of the first spring housing portion 21. The first spring seat 5 will also not move radially and come into contact with the input member 2. As a result, wear on the input member 2 can be prevented.

[0047] [Other embodiments] 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.

[0048] Variation 1 In the above embodiment, the first engaging portion 333 is a recessed portion and engages with the second engaging portion 52, but this is not particularly limited. The first engaging portion 333 may be a protruding portion, the second engaging portion 52 may be a recessed portion, and the protruding portion that is the first engaging portion 333 may be engaged with the recessed portion that is the second engaging portion 52.

[0049] Variation 2 In the above embodiment, the first engagement portion 333 and the second engagement portion 52 have an arc-shaped cross section, but this is not particularly limited. The first engagement portion 333 and the second engagement portion 52 may also have a rectangular cross section.

[0050] Variation 3 In the above embodiment, the damper device 100 includes the torsion damper 6, but is not particularly limited to this. As shown in FIG.

[0051] Variation 4 In the above embodiment, the configuration other than the arrangement of the second spring seats 7 and the third spring seats 8 is the same as that of the first spring seats 5, but is not limited to this. The configuration other than the arrangement of the second spring seats 7 and the third spring seats 8 may be different from that of the first spring seats 5. [Explanation of symbols]

[0052] 2 Input member 3 Output member 4. First coil spring 5. First spring seat 7. Second spring seat 8. Third spring seat 9 Second coil spring 21 First spring housing 31 Second spring housing 24 Third spring housing 34 Fourth spring housing 32 Hub 33 Hub flange 41 1st end face 42 Second end face 52 second engagement portion 53 Protrusion 91 Third end face 92 4th end face 100 Damper device 331 Page 1 332 2nd page 333 Department 1 334 Page 3 335 Page 4 521 Second contact surface 3331 First contact surface

Claims

1. A damper device that rotates toward a first side in a rotational direction due to torque input from an engine, an input member having a first spring housing portion and rotatably disposed; an output member that is arranged rotatably relative to the input member, the output member having: a second spring accommodating portion that is arranged at a position corresponding to the first spring accommodating portion; a first surface that defines an end face of the second spring accommodating portion on a first side in the rotation direction; a second surface that defines an end face of the second spring accommodating portion on a second side in the rotation direction that is opposite to the first side in the rotation direction; and a first engaging portion that is formed on the first surface; a first coil spring having a first end surface facing the first side in the rotation direction and a second end surface facing the second side in the rotation direction, the first coil spring being disposed in the first spring accommodating portion and the second spring accommodating portion; a first spring seat disposed between the first surface of the output member and the first end surface of the first coil spring; Equipped with the first spring seat has a retaining portion inserted into the first coil spring and a second engaging portion that engages with the first engaging portion, The first engagement portion has a first abutment surface facing radially inward, the second engagement portion has a second abutment surface facing radially outward and facing the first abutment surface, the second end surface of the first coil spring abuts against the second surface of the output member, The spring seat does not include a spring seat that holds the end of the first coil spring on the second side in the rotation direction. Damper device.

2. the first engagement portion is a recess including the first abutment surface, The second engagement portion includes the second abutment surface. The damper device according to claim 1 .

3. the first spring seat has a pair of protrusions that are spaced apart from each other in the axial direction and extend toward the first side in the rotational direction, the pair of protrusions sandwich the output member in the axial direction; The damper device according to claim 1 or 2.

4. A torsion damper that absorbs torsional vibrations; a second coil spring having a third end surface facing the first side in the rotation direction and a fourth end surface facing the second side in the rotation direction; a second spring seat and a third spring seat; Furthermore, the input member has a third spring housing portion, the output member has a fourth spring accommodating portion disposed at a position corresponding to the third spring accommodating portion, a third surface defining an end face of the fourth spring accommodating portion on the first side in the rotation direction, and a fourth surface defining an end face of the fourth spring accommodating portion on the second side in the rotation direction, the torsion damper is disposed within the second coil spring, the second coil spring is disposed in the third spring housing and the fourth spring housing, the second spring seat is disposed between the third surface of the output member and the third end surface of the second coil spring, the third spring seat is disposed between the fourth surface of the output member and the fourth end surface of the second coil spring. The damper device according to any one of claims 1 to 3.

5. The first spring seat has a seat portion that supports the first end face of the first coil spring. The damper device according to any one of claims 1 to 4.

6. The first surface of the output member includes an anti-misassembly surface that is arranged radially inward with respect to the first engagement portion, The first spring seat has an incorrect assembly prevention portion that abuts against the incorrect assembly prevention surface. The damper device according to any one of claims 1 to 5.

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