JP2019163853A - Damper device - Google Patents

Abstract

To inhibit occurrence of viscous resistance larger than or equal to expected resistance to improve damping performance of a damper in a damper device which damps rotational vibration with a viscous fluid.SOLUTION: A device 1 includes: an input side rotary member 2; an output side rotary member 3; multiple springs 41; and multiple end part spring seats 44. The input side rotary member 2 has an annular chamber 23 and first engagement parts 21d, 22d. The output side rotary member 3 can rotate relative to the input side rotary member 2 and has a second engagement part 31b. The multiple springs 41 are disposed in the annular chamber 23 and elastically connect the input side rotary member 2 to the output side rotary member 3 in a rotation direction. Each end part spring seat 44 is disposed between at least one of the first engagement parts 21d, 22d, and the second engagement part 31b and the spring 41 and includes communication grooves 441, 442 which penetrate in a circumferential direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a damper device.

  A vehicle drive system is provided with a damper device for transmitting power from the engine and attenuating input rotational fluctuations. As this type of damper device, a flywheel assembly as shown in Patent Document 1 has been proposed.

  The flywheel assembly of Patent Document 1 includes an input-side rotating member to which engine power is input, and an output plate arranged to be rotatable with respect to the input-side rotating member. The input side rotation member and the output plate are elastically connected in the rotation direction by a plurality of springs. A spring seat is disposed between each flywheel and the spring and between each spring.

  In this flywheel assembly, an annular chamber is formed by the input side rotating member. The annular chamber is filled with viscous fluid such as grease. The rotational vibration is attenuated by the resistance of the viscous fluid when the input side rotating member and the output plate rotate relative to each other.

JP2015-86965A

  In the flywheel assembly of Patent Document 1, when the input side rotating member and the output plate rotate relative to each other, between the input side rotating member and the output plate, specifically, the input side member and the spring of the output side member The grease flows into the space between the engaging portion. The grease that has flowed into the space is less likely to flow out of the space with the spring seat as a partition. For this reason, a viscous resistance exceeding a predetermined resistance is generated in the operation region of the damper, and a desired damping performance cannot be obtained.

  SUMMARY OF THE INVENTION An object of the present invention is to improve the damping performance of a damper device that suppresses the occurrence of viscous resistance exceeding a predetermined resistance in a damper device that attenuates rotational vibration by a viscous fluid.

  (1) A damper device according to the present invention includes a first rotating member, a second rotating member, a plurality of elastic members, and a plurality of end sheet members. The first rotating member includes an annular chamber filled with a viscous fluid and a first engaging portion. The second rotating member is rotatable relative to the first rotating member and has a second engaging portion. The elastic members are arranged in the circumferential direction in the annular chamber, and elastically connect the first rotating member and the second rotating member in the rotating direction. The end sheet member is disposed between at least one of the first engaging portion and the second engaging portion and the elastic member, and has a communication groove penetrating in the circumferential direction.

  In this apparatus, for example, power input to the first rotating member is transmitted to the second rotating member via the elastic member. When the elastic member is compressed through the end portion sheet during power transmission, the second rotating member is twisted with respect to the first rotating member. During such an operation, the viscous fluid interposed between the end sheets is caused between the first rotating member and the second rotating member, specifically, the engaging portion of one rotating member and the other rotating member. Transition to the gap between. The viscous fluid accumulated in the gap flows out through the communication groove formed in the end sheet member.

  Here, it is possible to avoid that the viscous resistance due to the viscous fluid increases beyond the preset viscous resistance when the damper is operated. Therefore, it can suppress that the damping performance of a damper falls.

  (2) Preferably, the communicating groove is formed in at least one corner portion of two corner portions where the outer peripheral surface and the side surface of the end portion sheet member intersect.

  Here, since the communication groove is formed at the corner of the outer periphery, the outer diameter of the elastic member received by the end sheet member can be increased. One of the engaging portions of the first and second rotating members engages with the central portion in the axial direction of the end sheet member. If the communication grooves are formed at the corners on the outer periphery, the communication grooves can be prevented from being blocked by the engaging portions.

  (3) Preferably, at least one intermediate sheet member having a communication groove that is disposed between the plurality of elastic members and penetrates in the circumferential direction is further provided.

  In this case, the viscous fluid smoothly flows from the one side in the circumferential direction of the intermediate sheet member to the other side through the communication groove. For this reason, it can suppress that the viscous resistance by a viscous fluid becomes large similarly to the above, and can suppress that the damping performance of a damper falls.

  (4) Preferably, the communication groove of the end sheet member and the communication groove of the intermediate sheet member are arranged on the same circumference.

  Here, since the communication grooves of both the sheet members are arranged on the same circumference, the viscous fluid is easily distributed uniformly in the circumference.

  (5) Preferably, the 1st rotation member has a pair of disk-shaped members arranged facing in the axial direction. And the 2nd rotation member is arrange | positioned between the axial directions of a pair of disk shaped members.

  (6) Preferably, the sheet member for edge part has the hole penetrated in the circumferential direction in the part which the end surface of an elastic member contact | abuts.

  Here, the viscous fluid accumulated in the gap between the one rotating member and the engaging portion of the other rotating member is discharged to the elastic member side through the hole in the end sheet member.

  According to the present invention as described above, in the damper device that attenuates the rotational vibration by the viscous fluid, it is possible to suppress the generation of the viscous resistance exceeding the predetermined resistance, and to obtain the desired damping performance of the damper.

Sectional drawing of the damper apparatus by position embodiment of this invention. The plane sectional view of a part of damper device. FIG. 2 is a partial front view of the apparatus of FIG. 1. The front view and side view of a spring seat for ends. The front view and side view of an intermediate spring seat. FIG. 2 is an enlarged partial view of FIG. 1.

[overall structure]
FIG. 1 shows a sectional configuration of the damper device 1, and FIG. 2 is a partial plan sectional view thereof. FIG. 3 is a partial front view of the damper device 1.

  The damper device 1 is a device for transmitting power generated by the engine to the transmission side. The damper device 1 includes an input side rotating member 2 (an example of a first rotating member), an output plate 3 (an example of a second rotating member), and a damper mechanism 4.

[Input-side rotating member 2]
The input side rotation member 2 is a member to which power generated by the engine is input. The input side rotating member 2 is supported and connected to an engine side member (not shown). The input side rotating member 2 includes a first plate 21 and a second plate 22.

  The first plate 21 includes a disk-shaped first plate body 21a, two first side parts 21b, and a cylindrical part extending in the axial direction from the outer periphery of the first plate body 21a and the first side part 21b. 21c.

  The outer peripheral portion 21d of the first plate body 21a is an end portion in the rotation direction of the first side portion 21b, and functions as a first engagement portion. That is, as shown in FIG. 2, the outer peripheral portion (first engaging portion) 21d of the first plate body 21a can be engaged with the end portion spring seat 44 (described later) in the rotational direction.

  The 1st side part 21b is a part which protruded to the engine side rather than the 1st plate main body 21a, for example, is shape | molded by press work. The two first side portions 21b are arranged at an equal pitch in the circumferential direction. The first side portion 21b is formed in a range corresponding to four springs (described later).

  The second plate 22 is an annular member fixed to the cylindrical portion 21c, and includes a disk-shaped second plate main body 22a and two second side portions 22b.

  The outer peripheral portion 22d of the second plate main body 22a is an end portion in the rotation direction of the second side portion 22b, and functions as a first engaging portion, like the outer peripheral portion 21d of the first plate 21. That is, as shown in FIG. 2, the outer peripheral portion (first engaging portion) 22d of the second plate body 22a can be engaged with an end spring seat 44 (described later) in the rotational direction.

  As described above, the first engaging portion 21d of the first plate main body 21a and the first engaging portion 22d of the second plate main body 22a can be engaged with the end portion of the end portion spring seat 44 in the circumferential direction. is there.

  The 2nd side part 22b is a part which protruded to the transmission side rather than the 2nd plate main body 22a, for example, is shape | molded by press work. The two second side portions 22b are arranged at an equal pitch in the circumferential direction. The second side portion 22b is formed in a range corresponding to the four springs.

  As described above, the annular chamber 23 is formed between the plates 21 and 22 by disposing the first plate 21 and the second plate 22 to face each other with an interval in the axial direction. The annular chamber 23 is filled with a viscous fluid such as grease. Further, by disposing the second side portion 22b opposite to the first side portion 21b in the outer peripheral portion of the input side rotating member 2, a relatively wide space for arranging the spring can be formed.

[Output plate 3]
The output plate 3 is disposed so as to be rotatable with respect to the input side rotation member 2. The output plate 3 is supported and connected to a member (not shown) on the transmission side.

  As shown in FIG. 3, the output plate 3 is an annular member, and includes a main body 3 a and two second engaging portions 3 b that protrude further outward from the outer periphery of the main body 3 a. The two second engaging portions 3b are arranged at opposing positions.

  The output plate 3 is disposed between the first plate 21 and the second plate 22 of the input side rotating member 2 in the axial direction. That is, the outer peripheral portion of the output plate 3 is disposed inside the annular chamber 23. The second engagement portion 3b is engaged with a circumferential end portion of a spring (described later). Therefore, the power transmitted to the input side rotation member 2 is transmitted to the second engagement portion 3b, that is, the output plate 3 via the plurality of springs.

[Damper mechanism 4]
The damper mechanism 4 is a mechanism that elastically couples the input side rotation member 2 and the output plate 3 in the rotation direction. The damper mechanism 4 includes two sets of torsion springs (an example of an elastic member) 41 disposed between the engaging portions 21d, 22d, and 3b, four end spring seats 44, and six intermediate spring seats. 45.

  The torsion spring 41 is configured by arranging first to fourth springs 41a, 41b, 41c, 41d side by side in the circumferential direction. These springs 41 a to 41 d act in series between the input side rotating member 2 and the output plate 3.

  The end portion spring seat 44 is in contact with the first engaging portions 21d and 22d of the input side rotating member 2 in the rotational direction in a neutral state where power is not transmitted to the device 1. Further, the end portion spring seat 44 can be brought into contact with the second engagement portion 3 b of the output plate 3.

  The four end spring seats 44 have the same shape. As shown in FIGS. 3 and 4, the end portion spring seat 44 is formed in a cylindrical shape having openings on both sides in the axial direction. The end spring seat 44 has a cylindrical portion 44a and a bottom portion 44b. The ends of the first and fourth springs 41a and 41d are inserted into the cylindrical portion 44a. Further, the ends of the end portions of the first and fourth springs 41a and 41d are in contact with the bottom portion 44b. The bottom portion 44b is formed with a discharge hole 44e penetrating in the circumferential direction.

  With this configuration, the end spring seat 44 supports the ends of the first and fourth springs 41a and 41d in the radial direction and the axial direction.

  In the outer peripheral portion of the end spring seat 44, communication grooves 441 and 442 that penetrate in the circumferential direction are formed at both corners in the axial direction. Specifically, communication grooves 441 and 442 are formed at two corners where the outer peripheral surface 44c and the side surface 44d of the end portion spring seat 44 intersect. That is, the communication grooves 441 and 442 are open on the outer peripheral side and one axial direction side. The communication grooves 441 and 442 penetrate from the one side in the rotation direction of the end portion spring seat 44 to the other side.

  The cross-sectional shape of the communication grooves 441 and 442 is not limited. The communication grooves 441 and 442 can be formed in various cross-sectional shapes such as a rectangular shape and an arc shape.

  The six intermediate spring seats 45 have the same shape. The intermediate spring seat 45 is disposed between adjacent springs. Specifically, intermediate springs are provided between the first spring 41a and the second spring 41b, between the second spring 41b and the third spring 41c, and between the third spring 41c and the fourth spring 41d, respectively. A sheet 45 is disposed.

  As shown in FIGS. 3 and 5, the intermediate spring seat 45 is formed in a tubular shape having openings on both sides in the axial direction. The intermediate spring seat 45 has two cylindrical portions 45a and a bottom portion 45b formed in each cylindrical portion 45a. The end portions of the first to third springs 41a, 41b, 41c are inserted into one cylindrical portion 45a of the three intermediate spring seats 45, and the first to first springs 41a, 41b, 41c are inserted into the bottom portion 45b of the cylindrical portion 45a. The tips of the three springs 41a, 41b, and 41c come into contact with each other. The ends of the second to fourth springs 41b, 41c, 41d are inserted into the other cylindrical portion 45a of the three intermediate spring seats 45, and the second to second springs 41b, 41c, 41d are inserted into the bottom 45b of the cylindrical portion 45a. The tip ends of the four springs 41b, 41c, 41d abut.

  With such a configuration, the intermediate spring seat 45 supports both ends of the first to fourth springs 41a, 41b, 41c, and 41d in the radial direction and the axial direction.

  In the outer peripheral portion of the intermediate spring seat 45, communication grooves 451 and 452 penetrating in the circumferential direction are formed at both corners in the axial direction. Specifically, communication grooves 451 and 452 are formed at two corners where the outer peripheral surface 45c and the side surface 45d of the intermediate spring seat 45 intersect. That is, the communication grooves 451 and 452 are open on the outer peripheral side and one axial direction side. The communication grooves 451 and 452 penetrate from the one side in the rotation direction of the intermediate spring seat 45 to the other side.

  Note that the cross-sectional shapes of the communication grooves 451 and 452 are not limited in the same manner as the end portion spring seat 44. The communication grooves 451 and 452 can be formed in various cross-sectional shapes such as a rectangular shape and an arc shape.

  Further, the communication grooves 441 and 442 of the end portion spring seat 44 and the communication grooves 451 and 452 of the intermediate spring seat 45 are formed at the same position in the radial direction. That is, these communication grooves 441, 442, 451, 452 are arranged on the same circumference.

[Seal mechanism 50]
A sealing mechanism 50 is provided between the first plate 21 and the second plate 22 and the output plate 3 (specifically, the output plate 31) so that the viscous fluid filled in the annular chamber 23 does not flow out of the chamber. Is provided.

  As shown in FIG. 6 which is a partially enlarged view of FIG. 1, the seal mechanism 50 is provided on the inner peripheral portion of the annular chamber 23, and has annular seal members 51a and 51b and cone springs 52a and 52b. . Specifically, a seal member 51a and a cone spring 52a are disposed between the radial intermediate portion of the first plate 21 and the output plate 3 in order from the first plate 21 side. Further, the second plate 22 is formed with an annular convex portion 22 e protruding toward the first plate 21 on the inner peripheral portion, and the second plate 22 is interposed between the annular convex portion 22 e and the output plate 3. A seal member 51b and a cone spring 52b are arranged in this order from the side.

  In such a configuration, the seal members 51 a and 51 b are pressed against the cone springs 52 a and 52 b (and thus the output plate 3) and the first and second plates 21 and 22, and the inner peripheral portion of the annular chamber 23 is sealed. .

[Operation]
In a neutral state where no power is input to the input side rotating member 2, the torsion spring 41 is not compressed, and there is no relative rotation (twist) between the input side rotating member 2 and the output plate 3.

  When power is input to the input side rotating member 2, the torsion spring 41 is compressed according to the magnitude of the power, and a twist occurs between the input side rotating member 2 and the output plate 3. In this state, power is transmitted from the input side rotating member 2 to the output plate 3 via the torsion spring 41. Further, the torsion spring 41 repeatedly expands and contracts according to the rotational vibration.

  When the damper is operated as described above, the end spring seat 44 and the intermediate spring seat 45 slide in the annular chamber 23, and sliding resistance is generated. In addition, viscous resistance is generated by the viscous fluid flowing from one side of the spring seats 44 and 45 to the other side. These resistances generate hysteresis torque and suppress rotational vibration.

  Further, when the damper is operated, the viscous fluid flows into the gap G between the first and second plates 21 and 22 and the second engaging portion 3b of the output plate 3 as shown in FIG. Here, if the end portion spring seat 44 is not provided with the communication grooves 441 and 442, the viscous fluid that has flowed into the gap G accumulates on the spot as the end portion spring seat becomes a partition. Hysteresis torque due to unintended viscous resistance occurs in the entire operating region.

  However, in this embodiment, since the end portion spring seat 44 is formed with the communication grooves 441 and 442, the viscous fluid flowing into the gap G flows out smoothly through the communication grooves 441 and 442. Further, the viscous fluid in the gap G flows out to the space where the torsion spring 41 is disposed through the discharge hole 44e of the end portion spring seat 44.

  In particular, the viscous fluid in the annular chamber 23 receives a force on the outer peripheral portion. Therefore, the viscous fluid is likely to be uniformly distributed circumferentially through the communication grooves 441, 442, 451, 452 formed in the outer peripheral portions of the end spring seat 44 and the intermediate spring seat 45. For this reason, generation | occurrence | production of the big hysteresis torque exceeding the hysteresis torque by the scheduled viscous fluid can be suppressed.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

  (A) In the above-described embodiment, the communication groove is provided in both the end spring sheet 44 and the intermediate spring sheet 45. However, it is only necessary that the communication groove is provided in at least the end spring sheet 44.

  (B) The shape and position of the communication groove are not limited to the above embodiment. For example, a groove penetrating in the circumferential direction may be formed on the side surface of each spring seat.

  (C) The number and shape of the end spring seats and the intermediate spring seats are not limited to the above embodiment.

  (D) The communication grooves are formed on both sides in the axial direction in each spring seat, but may be formed on at least one side.

  (E) In each spring seat, in addition to the communication groove penetrating in the circumferential direction, a groove extending in the axial direction may be formed. For example, in FIG. 2, a groove that connects the groove 441 on one side in the axial direction and the groove 442 on the other side may be formed. In this case, the viscous fluid can be more uniformly distributed in the axial direction.

  (F) In the above embodiment, the configuration in which the input-side rotating member is supported by the engine-side member and the output plate is supported by the transmission-side member has been described, but the configuration of each rotating member is not limited. For example, the present invention can be similarly applied to a configuration in which the input side rotation member is rotatably supported by the output plate.

2 Input side rotating member (first rotating member)
21 1st plate 22 2nd plate 21d, 22d 1st engaging part 23 Annular chamber 3 Output plate (2nd rotation member)
3b Second engaging portion 41 Torsion spring (elastic member)
44 Spring sheet for end 44e Discharge hole 441,442 Communication groove 45 Spring sheet for intermediate 451,452 Communication groove

Claims (6)

A first rotating member having an annular chamber filled with a viscous fluid therein, and a first engaging portion;
A second rotating member rotatable relative to the first rotating member and having a second engaging portion;
A plurality of elastic members arranged in a circumferential direction in the annular chamber and elastically connecting the first rotating member and the second rotating member in the rotating direction;
A plurality of end sheet members having a communication groove disposed between at least one of the first engagement portion and the second engagement portion and the elastic member and penetrating in a circumferential direction;
Damper device with   2. The damper device according to claim 1, wherein the communication groove is formed in at least one corner portion of two corner portions where an outer peripheral surface and a side surface of the end portion sheet member intersect each other.   3. The damper device according to claim 1, further comprising at least one intermediate sheet member disposed between the plurality of elastic members and having a communication groove penetrating in a circumferential direction.   The damper device according to claim 3, wherein the communication groove of the end sheet member and the communication groove of the intermediate sheet member are arranged on the same circumference. The first rotating member has a pair of disk-shaped members disposed facing each other in the axial direction,
The second rotating member is disposed between the pair of disk-shaped members in the axial direction.
The damper device according to any one of claims 1 to 4.   The damper device according to any one of claims 1 to 5, wherein the end sheet member has a hole penetrating in a circumferential direction at a portion where the end surface of the elastic member abuts.

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