JP2006009918A - Device for damping torsional vibration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assemble a spring in the state that a lock-up piston, an input-side member, and a holding member have been assembled. <P>SOLUTION: A supporting portion 3b for supporting an annular holding member 6 covering the outer periphery of the spring 5 so as to turn relative to the lock-up piston 2 is arranged at the position on the transmission side of the spring 5 excepting for the aperture 8 for inserting the spring 5 thereinto, for example, at the position of a first pressing portion 3e for compressing the spring 5 by pressing it, at which position the spring 5 does not exist in the circumferential direction. As a result, the spring 5 can be assembled from the aperture 8 on the transmission side in the state that the lock-up piston 2, the input-side member 3, and the holding member 6 have been assembled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a torsional vibration reducing device, which facilitates the incorporation of a spring when assembling the torsional vibration reducing device.

  A torsional vibration reducing device is provided between the crankshaft of the engine mounted on the vehicle and the turbine of the torque converter. The torsional vibration reduction device elastically connects an input side member directly connected to an engine crankshaft, an output side member connected to a turbine of a torque converter, and an input side member and an output side member in a rotational direction. It is comprised with the spring arrange | positioned along the circumferential direction. Then, when the spring arranged along the circumferential direction is compressed and centrifugal force acts to bend in a convex shape in the outer circumferential direction, this deformation is restricted and pressed against other components. In some cases, an annular holding member that is free and does not cause hysteresis is provided.

As a conventional torsional vibration reducing device provided with the holding member, there is one disclosed in Patent Document 1. In this torsional vibration reducing device, a spring holder as a holding member that covers the entire outer circumference of the spring has a radially inner side and an axial direction transmission by an outer peripheral edge portion of a drive member that is an input side member fixed to a piston. The side is regulated and held.
JP 2002-089657 A

  However, when assembling the torsional vibration reducing device, the drive member is assembled with a procedure in which a large number of springs and spring holders are assembled, and the incorporated drive member is coupled to the piston. There is a problem. It is difficult to incorporate a large number of springs into the drive member when the seating surface that receives the springs is not fixed, and it is difficult to apply pressure to the springs and install retainers at both ends of the springs. The degree of is even greater.

  On the other hand, although the assembly of the torsional vibration reduction device can be facilitated by using an assembly jig, there is a problem that the manufacturing cost increases due to an increase in equipment and process.

  Therefore, an object of the present invention is to provide a torsional vibration reduction device that solves the above-described problems.

  According to a first aspect of the present invention, there is provided a lockup piston that is disposed between a crankshaft of an engine and a transmission and is connectable to the crankshaft, an input side member coupled to the lockup piston, and the input side member A spring disposed along the circumferential direction between the plurality of first pressing portions formed on the outer peripheral portion of the ring, an annular holding member covering the outer periphery of the spring disposed along the circumferential direction, and the holding member Is connected to the turbine of the torque converter, and is connected to the turbine side of the torque converter. And an output side member that has a second pressing portion that compresses the spring between the first pressing portion and the first pressing portion. In a state in which serial assembled with lock-up piston and the input-side member and the holding member, and wherein the transmission side through the opening that is configured to incorporate the spring.

  In such a torsional vibration reduction device, since the support portion that supports the holding member so as to be rotatable relative to the lockup piston is disposed at a position excluding the opening when the spring is inserted from the transmission side, In a state where the piston, the input side member, and the holding member are assembled, there is no member that obstructs the insertion of the spring in the opening, and the spring can be incorporated after the assembly.

  The invention according to claim 2 is the torsional vibration reduction device according to claim 1, wherein the support portion is formed on the input side member.

  In such a torsional vibration reducing device, since the support portion is provided on the input side member, it is not necessary to provide a new member only for the purpose of supporting the holding member.

  According to a third aspect of the present invention, in the torsional vibration reduction device according to the second aspect, the support portion is formed in the first pressing portion located between the springs in a circumferential direction.

  In such a torsional vibration reducing device, since the support portion is formed on the first pressing portion of the input side member, it is located between the spring and the spring in the circumferential direction at the position of the first pressing portion where there is no spring. A support part will be arrange | positioned and when incorporating a spring, a spring will not interfere with a support part.

  According to a fourth aspect of the present invention, in the torsional vibration reduction device according to the second or third aspect, a pair of side surface restricting portions for restricting the side surfaces of the spring are formed inside the both ends of the holding member, and the pair of side surface restricting members are provided. The input side member is divided into a plurality of parts along a circumferential direction so that the support part is inserted between the parts.

  In such a torsional vibration reducing device, since the input side member is divided, a support portion having a large outer diameter can be inserted between a pair of side surface restricting portions having a small inner diameter in the holding member.

  According to a fifth aspect of the present invention, in the torsional vibration reducing device according to any one of the first to fourth aspects, a connecting portion that protrudes radially inward is formed on the holding member, and the spring is sandwiched between the connecting portions. It is characterized by comprising a pair of springs arranged in the above.

  In such a torsional vibration reduction device, the first pressing portion of the input side member and the second pressing portion of the output side member are connected via a pair of springs, and the connecting portion of the holding member is sandwiched between the pair of springs. It will be in the state. By the compression of the pair of springs, the connecting portion moves in the circumferential direction together with the holding member.

  The invention according to claim 6 is the torsional vibration reducing device according to any one of claims 1 to 4, wherein an arc spring is used as the spring.

  In such a torsional vibration reducing device, the input side member and the output side member are connected via only a single arc spring.

  According to the torsional vibration reduction device according to the present invention, the support portion for supporting the holding member so as to be relatively rotatable with respect to the lockup piston is disposed at a position excluding the opening portion when the spring is inserted from the transmission side. Therefore, in the state where the lockup piston, the input side member, and the holding member are assembled, there is no member that obstructs the insertion of the spring in the opening on the transmission side, and it becomes possible to incorporate the spring from the transmission side, Since the spring is assembled after assembly, the assembly work of the torsional vibration reducing device is facilitated. Since the radially outer side of the spring is regulated by the holding member, the relative movement amount between the spring and the holding member to which the largest force generated in the spring is applied is minimized, and the occurrence of hysteresis is suppressed.

Embodiments of a torsional vibration reducing device according to the present invention will be described below.
(A) Embodiment 1
First, the first embodiment will be described with reference to FIGS. A torque converter is disposed between a crankshaft of an engine (not shown) and a transmission (not shown). The torque converter is provided with a torsional vibration reducing device 1 shown in FIG. The torsional vibration reduction device 1 includes a lockup piston 2 that can be connected to a cover (not shown) of a torque converter coupled to the left crankshaft in FIG. 1, an input side member 3 coupled to the lockup piston 2, The output side member 4 connected to the turbine of the torque converter (not shown) on the right side of FIG. 1 is disposed along the circumferential direction, and the input side member 3 and the output side member 4 are elastic in the rotational direction. And a pair of side surface restricting portions 6 a and 6 b for restricting both sides of the spring 5, and is relatively rotatable with respect to the lock-up piston 2. And an annular holding member 6.

  A hole 2a for supporting the lockup piston 2 so as to be movable in the axial direction is formed at the center of the lockup piston 2, and a friction lining 2b is coupled to the vicinity of the outer peripheral surface. Due to the presence of the friction lining 2b, the lock-up piston 2 moves to the left in the axial direction and is frictionally coupled to a cover (not shown) of a torque converter that rotates integrally with the crankshaft of the engine, and rotates integrally with the cover. A cylindrical outer peripheral portion 2 e is formed on the outer peripheral portion of the lockup piston 2.

  As shown in FIG. 4A, the holding member 6 has an annular shape covering the outer periphery of the spring 5, and a pair of side surface restricting portions 6a for restricting both sides of the spring 5 as shown in FIG. 6b. As shown in FIG. 4C, the holding member 6 has four connecting portions 6c protruding inward in the circumferential direction at substantially equal intervals. The connecting portion 6c is provided to connect the pair of springs 5 and the spring 5 in the circumferential direction, and the connecting portion 6c includes a left portion and a lower portion of the end surface of the spring 5, as shown in the upper part of FIG. Abut. Further, in order to support the upper right of the spring 5 shown in the upper part of FIG. 1, a connecting convex portion 6 d is formed so as to protrude inward from the outer peripheral surface of the spring 5. Since the holding member 6 slides in contact with the spring 5 on which centrifugal force acts, high strength and durability are required, and carbonitriding is performed. A portion that slides with the spring 5 may be coated with a lubricating coating.

  The input side member 3 is connected to the transmission side surface of the lockup piston 2. As shown in FIG. 2, the input side member 3 is divided into four parts in the circumferential direction and attached in the present embodiment. 1 is divided into a pair of side surface regulating portions 6a and 6b having a small inner diameter size of the holding member 6, as shown in the lower part of FIG. This is to allow entry from the inside in the radial direction. Each input side member 3 is coupled to the lock-up piston 2 as follows. That is, by embossing the lock-up piston 2 in the circumferential direction at substantially equal intervals, a protruding shaft 2c is formed, while an attachment hole 3a is formed inside the input side member 3, and the attachment hole 3a is formed in the attachment hole 3a. The crimped portion 2d is formed by caulking the tip of the protruding shaft 2c with the protruding shaft 2c inserted. Since no hole is formed in the lockup piston 2, oil leakage between the oil chambers on both sides of the lockup piston 2 can be prevented.

  As shown in FIGS. 3 (a) and 1, the input side member 3 is formed with an arc-shaped throttle portion 3c at the radial intermediate portion for the purpose of reinforcement, and the mounting hole 3a is located more than the throttle portion 3c. It is arranged on the center side. Further, on the outside of the throttle portion 3c, as shown in a cross-sectional shape in FIG. 3C, a regulating portion 3d that regulates the inside of the spring 5 and the axial engine side is formed in an arc shape along the circumferential direction. Is formed. Between the left and right restricting portions 3d and 3d in FIG. 3A, a first press having a substantially U-shaped cross section that presses the end of the spring 5 as shown in the cross-sectional shape in FIG. Part 3e is formed. The first pressing portion 3e is raised from the throttle portion 3c toward the outer periphery, and the first pressing portion 3e is formed along the winding of the spring 5 on the engine side as shown in the lower part of FIG. Since the input side member 3 compresses the spring 5 and slides with the spring 5 and the holding member 6, high strength and hardness are required, and carbonitriding is performed.

  A support portion 3b is provided so as to rise to the outer periphery at an intermediate position in the circumferential direction of the first pressing portion 3e in FIG. As shown in the lower part of FIG. 1 and FIG. 2, the support part 3 b is an opening between the restriction part 3 d of the input side member 3 and the side face restriction part 6 b of the holding member 6 when the spring 5 is inserted from the transmission side. In the present embodiment, the position excluding the portion 8 is arranged at the position of the first pressing portion 3e between the spring 5 and the spring 5 in the circumferential direction, and the lockup piston 2, the input side member 3, and the holding member. 6 is considered so that the spring 5 can be assembled from the transmission side opening 8 after assembling. The support portion is disposed at a position excluding the opening portion 8 when the support portion is disposed in the opening portion 8 when the lock-up piston 2, the input side member 3, and the holding member 6 are assembled in advance and then the spring 5 is assembled. Moreover, the spring 5 interferes with the support portion and cannot be assembled. The support portion 3b restricts the engine side surface restricting portion 6a of the pair of side surface restricting portions 6a and 6b of the holding member 6 from moving to the axial transmission side. Since the support portion 3b is arranged at the position of the first pressing portion 3e where the spring 5 does not exist in the circumferential direction, when the spring 5 is inserted from the opening portion 8 along the axial direction, the spring 5 is supported by the support portion 3b. There is no interference with 3b. Here, the upper right quarter of FIG. 2 is a view in which the output side member 4 is omitted, and the lower right quarter is a view in which a part of the holding member 6 on the transmission side is further omitted as shown in FIG. As shown in the upper part of FIG. 1, the spring 5 is restricted in the axial direction by the restricting portion 3 d of the input side member 3. Therefore, the position of the spring 5 in the axial direction is adjusted by adjusting the shape of the restricting portion 3 d. As a result, the position of the side regulating portion 6 a on the engine side of the holding member 6 can be adjusted according to the position of the spring 5. Thereby, it is possible to prevent the holding member 6 that is relatively rotatable with respect to both the lockup piston 2 and the input side member 3 and the lockup piston 2 from rubbing.

  The restriction of the movement of the holding member 6 toward the axial engine side is indirectly performed by the restricting portion 3d as described above or by the lock-up piston 2. Further, the restriction of the holding member 6 in the radial direction is basically performed by the presence of the spring 5, but in the present embodiment, also by the presence of the cylindrical portion 2e of the lockup piston 2 and the presence of the support portion 3b. Has been done.

  A restricting portion 4a for restricting the inner side of the spring 5 and the axial transmission side as in the upper part of FIG. 1 is provided on the outer peripheral portion of the output side member 4, and the restricting portion 3d of the input side member 3 in the circumferential direction. And corresponding positions. Moreover, the 2nd press part 4b which presses the edge part of the spring 5 like the lower part of FIG. 1 is provided in the position corresponding to the 1st press part 3e of the said input side member 3 in the circumferential direction. The restricting portion 4a may be configured to restrict only the axial transmission side. On the inner peripheral side of the output side member 4, a mounting hole 4c for connecting to the turbine of the torque converter is formed.

  Next, the operation of the torsional vibration reducing device will be described.

  First, the assembly procedure of the torsional vibration reducing device will be described. The lock-up piston 2 is placed on the floor surface with the friction lining 2 b facing down, and the holding member 6 is put inside the lock-up piston 2. Next, the divided four input side members 3 are arranged so that the support portion 3b presses the side regulating portion 6a on the engine side of the holding member 6, and the protruding shaft 2c of the lockup piston 2 is attached to the mounting hole 3a. The tip of the protruding shaft 2c is caulked while being inserted into Accordingly, the holding member 6 is supported by the support portion 3b so as not to be separated from the lockup piston 2 as in the lower part of FIG. As a result, the holding member 6 is rotatable relative to the lock-up piston 2 in the circumferential direction while being restricted in the apparatus radial direction and the axial direction. Thereafter, a pair of springs 5 in which the retainer 5a is mounted only at the end on the first pressing portion 3e side are connected in series between the first pressing portion 3e and the first pressing portion 3e of the input side member 3 shown in FIG. The connecting portion 6 c of the holding member 6 is interposed between the pair of springs 5 and the spring 5. The spring retainer 5 a provided at the end of the spring 5 is provided for the purpose of stabilizing the pressing state of the spring 5.

  On the other hand, the output side member 4 is coupled to the turbine via a rivet (not shown) inserted through the mounting hole 4c when the torque converter turbine is assembled. In the course of assembling the turbine, the output side member 4 is attached from the axial direction to the lock-up piston 2 and the like incorporating the spring 5, and at this time, the second pressing portion 4 b of the output side member 4 is connected to the input side member. 3 enters the first pressing portion 3e. In the assembled state, the inner side of the spring 5 is regulated by the regulating parts 3d and 4a as in the upper part of FIG. 1, the outer periphery is regulated by the holding member 6 as in the lower part of FIG. 1, and the axial engine side is in FIG. The upper and lower parts are restricted by restriction parts 3d and 6a, and the axial transmission side is restricted by restriction parts 4a and 6b as in the upper and lower parts of FIG.

  In this embodiment, since the support portion 3b for supporting the holding member 6 so as to be relatively rotatable with respect to the lock-up piston 2 is disposed between the spring 5 and the spring 5 in the circumferential direction, When the piston 2, the input side member 3, and the holding member 6 are assembled, there is no member that obstructs the insertion of the spring 5 in the opening 8, and the spring 5 can be incorporated from the transmission side through the opening 8. it can. For this reason, the assembling work of the torsional vibration reducing device is easier than the conventional configuration in which the spring 5 is first incorporated. Moreover, since the support part 3b is provided in the input side member 3, it is not necessary to provide a new member only for the purpose of supporting the holding member 6. Further, since the support portion 3b is formed in the first pressing portion 3e of the input side member 3, the support portion 3b is arranged at the position of the first pressing portion 3e where the spring 5 does not exist in the circumferential direction. The interference of the support part 3b when inserting the is avoided. And the 1st press part 3e should just be extended a little to an outer periphery, and processing will be sufficient. Furthermore, since the input side member 3 is divided, the support portion 3b having a large outer diameter can be inserted inside the pair of side surface regulating portions 6a and 6b having a small inner diameter size of the holding member 6. And by dividing the input side member 3, the yield of the material is improved. Moreover, the yield can be further improved by making the plate | board thickness of the input side member 3 the same as the plate | board thickness of the holding member 6, and carrying out material co-recovery.

In such a torsional vibration reducing device, when the output side member 4 rotates relative to the input side member 3 integrated with the lockup piston 2, the output side member 4 relatively rotates in any direction. However, the pair of springs 5 are compressed by the first pressing portion 3e of the input side member 3 and the second pressing portion 4b of the output side member 4, and the spring 5 has an elastic property, so that torsional vibration is reduced. Is done. Then, due to the compression of the pair of springs 5, the connecting portion 6 c moves in the circumferential direction together with the holding member 6. Since the spring 5 is compressed, a force acts in the outer circumferential direction. Further, since the spring 5 rotates, a centrifugal force is applied, and all the force in the outer circumferential direction and the centrifugal force are applied to the holding member 6. These forces are strongest at the position of the connecting portion 6 c located at the center of the pair of springs 5, and this position has the largest relative movement amount of the spring 5 and the holding member 6 in the circumferential direction. There are few positions. In the portion where the force applied from the spring 5 to the holding member 6 is the largest, the relative movement amount of both is minimized, so that the occurrence of hysteresis is suppressed to a minimum.
(B) Embodiment 2
Next, the second embodiment will be described with reference to FIG. Since this embodiment is obtained by changing a part of the first embodiment, only portions different from the first embodiment will be described.

  As shown in the upper part of FIG. 5, the connecting portion 6c of the holding member 6 is extended inward to form a guided portion 6e. The guided portion 6e is movably provided between the input side member 3 and the output side member 4. In order to form a guide space 7 for the guided portion 6e to move between the input side member 3 and the output side member 4, as can be seen from a comparison between FIG. 1 and FIG. The aperture amount 3c is smaller than that of the first embodiment. Since the axial direction of the holding member 6 is regulated by the guided portion 6e and the guide space 7, no support portion is provided on the input side member 3 as can be seen by comparing the lower portion of FIG. 5 with the lower portion of FIG. .

  Since the guided portion 6e is provided so as to be movable in the circumferential direction along the guide space 7, the holding member 6 is not separated from the lock-up piston 2 in a state where it is regulated in any axial direction. So that it is regulated.

Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.
(C) Embodiment 3
Next, Embodiment 3 will be described. Although Embodiment 1 has a configuration in which a pair of springs are connected via a connecting portion, since this embodiment uses a single spring and the connecting portion of the holding member is removed, the illustration is omitted.

  In this case, the force applied from the single spring to the holding member is the largest at the intermediate portion of the single spring, but a frictional force acts between the intermediate portion of the single spring and the holding member. Since there is no relative movement, the occurrence of hysteresis can be suppressed as in the first embodiment. And the assembly work of the torsional vibration reducing device is also easier than the first embodiment because the number of springs is halved.

  In addition, when using a single spring, you may make it use the arc spring bent in circular arc shape beforehand in the state which does not apply external force. Similarly, in this case, the occurrence of hysteresis can be suppressed. However, for an arc spring that is bent in an arc shape and the outer peripheral side is in contact with the member and generates a particularly large hysteresis, the provision of a holding member is effective for the hysteresis. It can be said that it is the most effective means for reducing the occurrence.

  In the first and third embodiments, the side surface restricting portion 6a of the holding member 6 is restricted. However, since the support portion is disposed at a position where the spring 5 does not exist in the circumferential direction, the side restricting portion 6a is replaced. Thus, the holding member 6 may be supported on the lock-up piston 2 so as to be relatively rotatable by restricting the side restricting portion 6b.

FIG. 3 is a cross-sectional view taken along line A-O-B in FIG. FIG. 5 is a front view of the torsional vibration reduction device with the output side member removed in the right half (Embodiment 1). It relates to the input side member of the torsional vibration reducing device, (a) is a front view, (b) is a CC arrow view of (a), (c) is a DD arrow view of (a) (implementation) Form 1). 1. (a) is a front view, (b) is an EE arrow view of (a), and (c) is an FF arrow view of (a) (embodiment). 1). Sectional drawing which shows a torsional vibration reducing device (Embodiment 2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Torsional vibration reduction apparatus 2 ... Lock-up piston 3 ... Input side member 3b ... Support part 3e ... 1st press part 4 ... Output side member 4b ... 2nd press part 5 ... Spring 6 ... Holding member 6a, 6b ... Side regulation Part 6c ... Connection part 8 ... Opening

Claims (6)

A lock-up piston disposed between the crankshaft of the engine and the transmission and connectable to the crankshaft;
An input side member coupled to the lock-up piston;
A spring disposed along the circumferential direction between the plurality of first pressing portions formed on the outer peripheral portion of the input side member;
An annular holding member covering the outer periphery of the spring arranged along the circumferential direction;
A support portion disposed at a position excluding an opening when the spring is inserted from the transmission side while supporting the holding member so as to be rotatable relative to the lock-up piston;
An output side member connected to the turbine of the torque converter, incorporated from the transmission side toward the input side member, and having a second pressing portion that compresses the spring with the first pressing portion;
The torsional vibration reducing device is configured to incorporate the spring from the transmission side through the opening in a state where the lockup piston, the input side member, and the holding member are assembled. The torsional vibration reduction device according to claim 1, wherein the support portion is formed on the input side member. The torsional vibration reduction device according to claim 2, wherein the support portion is formed on the first pressing portion located between the springs in a circumferential direction. The torsional vibration reduction device according to claim 2 or 3, wherein a pair of side surface restricting portions for restricting the side surface of the spring is formed inside both ends of the holding member, and the support portion is disposed between the pair of side surface restricting portions. A torsional vibration reduction device characterized in that the input side member is divided into a plurality of pieces along the circumferential direction in order to enter. The torsional vibration reduction device according to any one of claims 1 to 4, wherein a connecting portion that protrudes radially inward is formed on the holding member, and the spring is constituted by a pair of springs arranged with the connecting portion interposed therebetween. A torsional vibration reducing device characterized by that. 5. The torsional vibration reducing device according to claim 1, wherein an arc spring is used as the spring.

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