JP2006183776A - Lock-up device for fluid type torque transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a damper function of a lock-up device by stabilizing extension and contraction movements of an elastic member in regard to a lock-up device for a fluid type torque transmission device. <P>SOLUTION: The lock-up device 9 is provided with a clutch mechanism 20 provided between a front cover 5 and a turbine 6, a drive plate 21 having a plurality of first and second input side locking parts 41 and 42 and inputted with torque from the front cover 5, a driven plate 22 having a plurality of output side locking parts 46 and outputting torque to the turbine 6, torsion springs 23 and 24 arranged between rotating directions of the input side and output side locking parts 41, 42, and 46, and seat members 50 attached to both ends of the torsion spring 23. The seat member 50 has a protrusion part 52 protruding in the rotating direction, movement to a radial outer side is regulated in a state locked with the output side locking part 46, and the output side locking part 46 abuts on a center of the seat member 50 in the rotating direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lockup device for a fluid torque transmission device, and more particularly to a lockup device for directly transmitting torque between a member on an engine side and a member on a transmission side without using a fluid torque transmission device.

  A torque converter is a kind of fluid type torque transmission device that has three types of impellers (impeller, turbine, and stator) therein and transmits torque via internal hydraulic oil. This torque converter is often provided with a lock-up device.

  The lockup device is disposed in a space between the turbine and the front cover, and is a mechanism for directly transmitting torque from the front cover to the turbine by mechanically connecting the front cover and the turbine.

Usually, this lockup device is supported by a disc-shaped piston that can be pressed against the front cover, a retaining plate that is fixed to the outer periphery of the piston, and a rotating direction and an outer peripheral side by the retaining plate. It has a torsion spring and a driven plate that supports both ends of the torsion spring in the rotational direction. The driven plate is fixed to a turbine shell or the like of the turbine. In this device, the piston is pressed to the front cover side by hydraulic pressure and the two members are connected to transmit torque directly from the front cover to the output-side turbine hub without passing through the torque converter (for example, patents). Reference 1).
JP 2001-295912 A

  The lock-up device also has a damper function that attenuates and absorbs torsional vibration input from the front cover. Specifically, torsional vibration is attenuated and absorbed by a torsion spring. However, when the lockup device is connected, the input side plate and the torsion spring rotate together with the front cover, so that a centrifugal load acts on the torsion spring. Then, the torsion spring (particularly the end of the torsion spring) may come into contact with the outer peripheral member. In this state, when vibration or slight torque fluctuation is input to the front cover and the torsion spring expands and contracts in the rotation direction, the torsion spring slides with the member on the outer peripheral side to generate hysteresis torque.

  In order to reduce the occurrence of such hysteresis torque, a seat member for restricting movement toward the outer peripheral side may be attached to both ends of the torsion spring (see, for example, Patent Document 1). The sheet member is provided with a protrusion for supporting the sheet on the input side or output side plate in the radial direction. In consideration of the rotation of the torsion spring and the seat member, the protrusion is provided at the center of the seat member. However, when the protrusion is provided at the center of the sheet member, the portion where the input side or output side plate contacts the sheet member in the rotational direction is moved away from the center of the sheet member, and the expansion and contraction operation of the torsion spring is not stable. As a result, the damper function of the lockup device is lowered because the torsional vibration is not effectively attenuated / absorbed by the lockup device. In addition, if the expansion / contraction operation of the torsion spring is not stable, a biased load acts on the torsion spring and the durability of the torsion spring is reduced.

  The subject of this invention is improving the damper function of a lockup apparatus by stabilizing the expansion-contraction operation | movement of an elastic member in the lockup apparatus of a fluid type torque transmission device.

  The lockup device for a fluid torque transmission device according to claim 1 is disposed in a space between an input side rotator and an output side rotator of the fluid torque transmission device, and includes an input side rotator and an output side rotator. Are mechanically connected. The lockup device includes a clutch mechanism provided in a torque transmission path between the input side and the output side rotating body, an input side member having a plurality of input side locking portions and receiving torque from the front cover, An output-side member that has a plurality of output-side locking portions and outputs torque to the output-side rotator, and is arranged between the input-side and output-side locking portions in the rotation direction. A plurality of elastic members that are elastically connected to each other, and sheet members that are attached to both ends of the elastic members. The sheet member includes a main body portion that is attached to an end portion of the elastic member, and a protrusion that protrudes from the main body portion in the rotation direction and is engaged with one of the input side and output side engagement portions. Further, the sheet member is restricted from moving outward in the radial direction in a state where the protrusion is locked to one of the input side and output side locking portions. In addition, one of the input side and output side locking portions is in contact with the center of the sheet member in the rotational direction.

  In this lockup device, since the sheet member is restricted from moving radially outward by the input side and output side engaging portions, the hysteresis torque can be reduced. Since one of the input side member and the output side member is in contact with the center of the sheet member in the rotational direction, the elastic member can be more stably expanded and contracted when the damper is operated than in the prior art. Thereby, in this lockup apparatus, a damper function improves compared with the past.

  According to a second aspect of the present invention, the lockup device of the fluid torque transmission device according to the first aspect is configured such that one of the input side and output side locking portions locks the protrusion so that the rotation of the sheet member can be restricted. .

  In this lockup device, the rotation of the sheet member can be restricted, so that one of the input side and output side latching portions can reliably contact the center of the sheet member, and the elastic member can be further expanded and contracted. It can be reliably stabilized. Here, the rotation of the sheet member refers to rotation around the central axis of the sheet member.

  The lockup device of the fluid torque transmission device according to claim 3 is the lockup device according to claim 1 or 2, wherein one of the input side and output side locking portions rotates when the sheet member rotates. The protrusion is locked so as to move inward in the radial direction with respect to one of the two.

  When the elastic member and the sheet member are rotating together with the input side and output side members, centrifugal force acts on the elastic member and the sheet member. On the other hand, in this lockup device, when the sheet member rotates, the protrusion is locked so as to move inward in the radial direction with respect to one of the input side and output side locking portions. That is, when the sheet member rotates, the sheet member moves in a direction against the centrifugal load. As a result, the rotation of the sheet member can be reliably regulated using the centrifugal load. Thereby, in this lockup apparatus, the expansion-contraction operation | movement of an elastic member can be stabilized more reliably.

  According to a fourth aspect of the present invention, in the lockup device of the fluid type torque transmitting device according to any one of the first to third aspects, the sheet member is provided at a position where the protruding portion is eccentric.

  In this lock-up device, since the protrusion is provided at an eccentric position, one of the input side and output side locking portions can more reliably contact the center of the sheet member, and the elastic member can be expanded and contracted. It can be stabilized more reliably.

  According to a fifth aspect of the present invention, the lockup device of the fluid type torque transmitting device according to any one of the first to fourth aspects, wherein the protrusion is disposed on the radially inner side of one of the input side and the output side locking portion.

  A lockup device for a fluid torque transmission device according to a sixth aspect of the present invention is the lockup device according to any one of the first to fifth aspects, wherein the radially outer portion of the protrusion has a tapered shape in the rotational direction.

  In this lockup device, since the protruding portion has a tapered shape, even when one of the input side and output side locking portions is separated from the sheet member in the rotation direction, both members are easily engaged again.

  According to a seventh aspect of the present invention, the lockup device of the fluid torque transmission device according to any one of the first to sixth aspects, wherein the radially outer portion of the protrusion has an arcuate curved surface.

  In this lockup device, since the protrusion has an arcuate curved surface shape, when the sheet member rotates, it is locked so as to move inward in the radial direction with respect to one of the input side and output side locking portions. Can be made. Thereby, rotation of a sheet | seat member can be reliably controlled using a centrifugal load.

  A lockup device for a fluid torque transmission device according to an eighth aspect of the present invention is the lockup device according to any one of the first to seventh aspects, wherein one of the radially inner ends of the input side and output side locking portions is tapered in the rotational direction. Have.

  In this lock-up device, one of the input side and output side latching portions has a tapered shape, so that even when one of the input side and output side latching portions is separated from the sheet member, both members are engaged again. It becomes easy to unite.

  In the lockup device according to the present invention, the damper function of the lockup device can be improved by stabilizing the expansion and contraction operation of the elastic member.

An embodiment of the present invention will be described with reference to the drawings.
[Basic structure of torque converter]
FIG. 1 is a schematic longitudinal sectional view of a torque converter 1 in which an embodiment of the present invention is employed. The torque converter 1 is a device for transmitting torque from a crankshaft of an engine (not shown) to an input shaft 3 of a transmission (not shown). An engine (not shown) is arranged on the left side of FIG. 1, and a transmission (not shown) is arranged on the right side of FIG. OO shown in FIG. 1 is a rotating shaft of the torque converter 1.

  The torque converter 1 includes a front cover 5, a torus-shaped fluid working chamber 8 including three types of impellers (an impeller (not shown), a turbine 6, and a stator 7), and a lockup device 9.

  The front cover 5 is a disk-shaped member and is connected to a crankshaft (not shown). An outer peripheral cylindrical portion 5 a extending toward the transmission side is formed on the outer peripheral portion of the front cover 5. The outer peripheral edge of the impeller shell 11 of the impeller is fixed to the front end of the outer peripheral cylindrical portion 5a by welding. As a result, a fluid chamber filled with hydraulic oil is formed by the front cover 5 and the impeller. The impeller has a well-known structure, and mainly includes an impeller shell, a plurality of impeller blades fixed inside the impeller shell, and an impeller hub fixed to the inner peripheral portion of the impeller shell.

  The turbine 6 is disposed in the fluid chamber so as to face the impeller in the axial direction. The turbine 6 mainly includes a turbine shell 15, a plurality of turbine blades 16 fixed to the impeller side surface, and a hub flange 17 fixed to the inner peripheral edge of the turbine shell 15. The hub flange 17 includes a flange portion 17 a and a boss portion 17 b, and the turbine shell 15 and the hub flange 17 are fixed by a plurality of rivets 18 at the flange portion 17 a of the hub flange 17.

  A spline that engages with the input shaft 3 is formed on the inner peripheral surface of the boss portion 17 b of the hub flange 17. As a result, the hub flange 17 rotates integrally with the input shaft 3.

[Structure of lock-up device]
The lockup device 9 is disposed in a space between the turbine 6 and the front cover 5 and is a mechanism for mechanically connecting the two as required. The lock-up device 9 has a function of a clutch and an elastic coupling mechanism, and mainly includes a clutch mechanism 20 disposed on the side of the front cover 5 and a drive disposed between the clutch mechanism 20 and the turbine 6. The plate 21 (input side member), the driven plate 22 (output side member) disposed between the drive plate 21 and the turbine 6, and the drive plate 21 and driven plate 22 are elastically coupled in the circumferential direction. A plurality of first torsion springs 23 (elastic members) are included.

  The clutch mechanism 20 is a mechanism for transmitting and blocking torque between the front cover 5 and the drive plate 21, and includes a clutch portion 25 and a piston 26.

  The clutch portion 25 includes a case 30 having one end welded and fixed to the side surface of the front cover 5, a plurality of input clutch plates 31 and output clutch plates 32 alternately arranged in the axial direction, and a clutch output member 33. ing.

  The case 30 is formed in a cylindrical shape and has a plurality of grooves at equal intervals in the circumferential direction. This groove is formed with a predetermined length from the transmission side. Each of the clutch plates 31 and 32 is formed in an annular shape. A lug that engages with the groove of the case 30 is formed on the outer periphery of the input clutch plate 31, and a plurality of spline teeth and the like are formed on the inner periphery of the output clutch plate 32. Internal teeth are formed. These clutch plates 31 and 32 are axially movable in the case 30, and their movement is restricted by a back plate 34 and a retaining ring 35 provided in the case 30. Further, friction facings are affixed to both side surfaces of the output clutch plate 32. The clutch output member 33 extends to the engine side at the outer peripheral cylindrical portion 33a, the disc-shaped side surface portion 33b extending from one end of the outer peripheral cylindrical portion 33a to the inner peripheral side, and the inner peripheral end portion of the disc-shaped side surface portion 33b. And an inner circumferential cylindrical portion 33c provided. External teeth such as a spline shaft are formed on the outer peripheral surface of the outer cylindrical portion 33a, and the internal teeth of the output clutch plate 32 are engaged with the external teeth. A cylindrical portion 17c extending toward the engine side is formed at the outer peripheral end of the flange portion 17a of the hub flange 17, and an annular stopper portion 17d extending toward the outer peripheral side is formed at the end portion of the cylindrical portion 17c. Yes. The inner peripheral cylindrical portion 33c of the clutch output member 33 is slidably supported by the cylindrical portion 17c of the hub flange 17, and the movement in the axial direction is restricted by the stopper portion 17d.

  The piston 26 is a ring-shaped member provided between the front cover 5 and the clutch portion 25, and is slidably supported on an outer peripheral portion of a support member 36 that is fixed to the side surface of the front cover 5 by welding. . The piston 26 presses the clutch plates 31 and 32 of the clutch portion 25 by the hydraulic pressure supplied to the gap between the piston 26 and the front cover 5. Note that the inner peripheral portion of the piston 26 and the outer peripheral portion of the support member 36 are spline-coupled so that the piston 26 and the front cover 5 rotate synchronously, and are not relatively rotatable and axially movable.

  As shown in FIG. 2 in which a part of FIG. 1 and FIG. 1 is extracted, the drive plate 21 is a disk-shaped plate having an opening at the center, and has a plurality of spring storage portions 40 at the outer periphery. The inner peripheral portion is fixed to the disc-shaped side surface portion 33 b of the clutch output member 33 by a rivet 43. The drive plate 21 has a substantially intermediate portion in the radial direction and is long in the circumferential direction for restricting the relative angle range between the drive plate 21 and the driven plate 22 (see the lock-up device in FIG. 1 from the turbine side). A plurality of holes 21a are formed.

  The plurality of spring storage portions 40 are formed by forming the outer peripheral portion of the drive plate 21 in a substantially U shape, and are arranged at equal intervals in the circumferential direction. Each spring accommodating portion 40 has an inner peripheral wall portion 40a, a side wall portion 40b, and an outer peripheral wall portion 40c, and the tip end portion (open side edge portion) of the outer peripheral wall portion 40c is bent toward the inner peripheral side. The bent portion 40d. The first torsion spring 23 accommodated in the spring accommodating portion 40 is supported by the side wall portion 40b on the engine side, the outer periphery portion is supported by the outer peripheral wall portion 40c, and the bent side portion 40d on the transmission side. Is supported by.

  Further, the drive plate 21 is formed with a first input side locking portion 41 and a second input side locking portion 42 adjacent to the spring storage portion 40 in the circumferential direction. The first input side locking portion 41 is formed by bending the outer peripheral end portion of the driven plate 22 in the inner peripheral direction, and can be locked to both end surfaces of the first torsion spring 23 stored in the spring storage portion 40. Has been placed. More specifically, a sheet member 50 described later is attached to both ends of the first torsion spring 23, and the first input side locking portion 41 can be locked to the sheet member 50. Further, the second input side latching portion 42 is formed so that a part of the drive plate 21 is processed and can be latched to both end surfaces of the sheet member 50 of the first torsion spring 23 housed in the spring housing portion 40. It has been done.

  Similarly to the drive plate 21, the driven plate 22 is a disk-shaped plate having an opening at the center. A plurality of spring facing portions 45 and output-side locking portions 46 are alternately formed in the circumferential direction on the outer peripheral portion of the driven plate 22. Further, the inner peripheral portion is fixed to the flange portion 17 a of the hub flange 17 together with the turbine shell 15 by a rivet 18. Further, a stopper claw 22a formed by being cut and raised toward the engine side so as to protrude in the axial direction is provided at a substantially intermediate portion in the radial direction of the driven plate 22, and the stopper claw 22a is provided on the drive plate 21. Is inserted into the hole 21a.

  Thus, the stopper claw 22a and the hole 21a constitute a stopper mechanism for restricting the angular range in which the drive plate 21 and the driven plate 22 can be rotated relative to each other. The circumferential length of the hole 21a is set such that the first torsion spring 23 does not adhere when the plates 21 and 22 are relatively rotated and the stopper claw 22a comes into contact with the end surface of the hole 21a. Has been.

  The spring facing portion 45 is formed so as to face the first torsion spring 23 housed in the spring housing portion 40 of the drive plate 21 in the axial direction, and is not in contact with the first torsion spring 23. Further, the output side locking portion 46 is formed by bending the outer peripheral portion of the driven plate 22 to the engine side, and can be locked to both circumferential end surfaces of the seat member 50 of the first torsion spring 23. . And the radial direction inner side edge part of the output side latching | locking part 46 has a taper shape toward the rotation direction.

[Torsion spring and seat member]
Here, details of the first torsion spring 23 and the seat member 50 will be described. As shown in FIG. 3, a second torsion spring 24 is accommodated inside the first torsion spring 23. The second torsion spring 24 has a smaller diameter and a shorter length than the first torsion spring 23.

  As described above, the sheet members 50 are attached to both ends of the first torsion spring 23. FIG. 4 shows a detailed view of the sheet member 50. FIG. 4 is a three-side view of the sheet member 50, and the vertical and horizontal center lines of the sheet member 50 are P and Q. The sheet member 50 includes a locking part 51 (main body part), a protruding part 52, and an insertion part 53 (included in the main body part).

  The locking portion 51 is a portion that contacts the end portion of the first torsion spring 23 in the rotation direction, and has a disk shape. The first locking surface 51a on the first torsion spring 23 side of the locking part 51 is in contact with the end of the first torsion spring 23 in the rotational direction. In addition, the second locking surface 51b on the opposite side of the locking portion 51 from the first torsion spring 23 side has a first input side locking portion 41, a second input side locking portion 42, and an output side locking portion 46. Abutting in the radial direction. Further, a part of the outer peripheral side of the engaging part 51, more specifically, a part on the inner side in the radial direction, is chamfered in consideration of interference with the second input-side engaging part 42 on the inner peripheral side.

  A protrusion 52 is provided on the second locking surface 51 b side of the locking part 51. The protrusion 52 is a portion that is locked in the radial direction with the output-side locking portion 46 described above, and is disposed radially inward with respect to the output-side locking portion 46. Specifically, the protrusion 52 is provided at a position eccentric from the center of the sheet member 50 (intersection of the center lines P and Q) and has a substantially semicircular shape when viewed from the rotational direction side. The protrusions 52 are formed symmetrically with respect to the center line P. As shown in FIG. 4, the radially outer portion of the protrusion 52 has a curved shape that is tapered and arcuate in the rotational direction. This surface is referred to as a third locking surface 52a, and the center (portion on the center line P) of the third locking surface 52a is referred to as a vertex portion 52b. Further, the radially inner portion of the protrusion 52 is a flat surface in consideration of the interference with the second input side locking portion 42 described above.

  As described above, since the sheet member 50 is disposed at a position where the protrusion 52 is eccentric, the output side locking portion 46 can reliably contact the center of the sheet member 50. Further, since the protrusion 52 has a tapered shape, both the members 46 and 50 are easily engaged again even when the output side locking portion 46 is separated from the sheet member 50 in the rotation direction as will be described later. . Further, since the protrusion 52 has an arcuate curved surface shape, the sheet member 50 can be locked so as to move radially inward with respect to the output side locking portion 46 when the sheet member 50 rotates, The rotation of the sheet member 50 can be reliably regulated using the load.

  Further, an insertion portion 53 is provided on the first locking surface 51 a side of the locking portion 51. The insertion portion 53 has a cylindrical shape with a diameter smaller than that of the locking portion 51, and is inserted into the first torsion spring 23. When the first torsion spring 23 contracts, the rotational end surface 53 a of the insertion portion 53 comes into contact with the end of the second torsion spring 24.

[Operation]
The operation of the lockup device 9 will be described with reference to FIGS.

  Immediately after starting the engine, hydraulic oil is supplied into the main body of the torque converter 1, and no hydraulic oil is supplied between the piston 26 and the front cover 5. Therefore, torque transmission by the torque converter 1 is performed, and the lockup device 9 does not act.

  On the other hand, when the speed ratio of the torque converter increases and the input shaft 3 reaches a certain rotation speed, hydraulic oil is supplied between the piston 26 and the front cover 5, and the piston 26 is connected to the clutch plates 31 and 32 of the clutch portion 25. Press. As a result, the torque of the front cover 5 is transmitted to the drive plate 21 via the clutch portion 25 and the clutch output member 33, and further transmitted to the driven plate 22 via the first and second torsion springs 23 and 24. That is, the front cover 5 is mechanically coupled to the hub flange 17 of the turbine 6, and the torque of the front cover 5 is directly output to the input shaft 3 via the hub flange 17.

  In such an operation, the first and second torsion springs 23 and 24 repeatedly expand and contract. Specifically, when torsional vibration is input to the drive plate 21, the drive plate 21 and the driven plate 22 rotate relative to each other, and the first torsion spring 23 is compressed between the plates 21 and 22. And the output side latching | locking part 46 presses one sheet | seat member 50 to a rotation direction, and the 1st torsion spring 23 is compressed between the 1st and 2nd input side latching | locking parts 41 and 42. FIG. When the first torsion spring 23 contracts by a certain amount, the end surface 53a of the insertion portion 53 of the sheet member 50 presses the end of the second torsion spring 24, and thereafter, the first and second torsion springs 23, 24 are pressed. Is compressed.

  Here, since the first and second torsion springs 23, 24 rotate together with the drive plate 21, a centrifugal load acts on both springs 23, 24. Therefore, when the first torsion spring 23 expands and contracts, the first torsion spring 23 slides with the outer peripheral wall portion 40c of the spring accommodating portion 40, and hysteresis torque is generated. However, since the movement of the sheet member 50 radially outward is restricted by the output side locking portion 46 via the protrusion 52, the end of the first torsion spring 23 is also restricted from moving radially outward. The As a result, the sliding between the first torsion spring 23 and the outer peripheral wall portion 40c can be suppressed, so that the hysteresis torque can be reduced. And since the projection part 52 is arrange | positioned in the eccentric position, the output side latching | locking part 46 can contact | abut with the center of the sheet | seat member 50. FIG. Thereby, since the expansion and contraction operations of the first and second torsion springs 23 and 24 are more stable than in the prior art, the damper function of the lockup device 9 can be further stabilized.

  In addition, since the protrusion 52 and the output side latching portion 46 each have a tapered shape, even when the output side latching portion 46 is separated from the sheet member 50 in the rotational direction, both the members 46 and 50 are engaged again. It becomes easy to unite. Furthermore, since the radially outer portion of the protrusion 52 has an arcuate curved shape, the sheet member 50 is locked so as to move radially inward relative to the output side locking portion 46 when the sheet member 50 rotates. Can be made. That is, when the sheet member 50 rotates while the centrifugal load is acting, the sheet member 50 moves in a direction against the centrifugal load. As a result, the position of the sheet member 50 in the rotation direction is stabilized in a state where the periphery of the apex portion 52b of the protrusion 52 and the output side locking portion 46 are in contact with each other. As a result, since the rotation of the sheet member 50 can be reliably regulated using the centrifugal load, the expansion and contraction operations of the first and second torsion springs 23 and 24 can be more reliably stabilized. Thereby, the damper function of the lockup device 9 can be further stabilized. In addition, by stabilizing the expansion and contraction operation of the first and second torsion springs 23 and 24, it is possible to reduce the effect of uneven load on both springs 23 and 24, so the durability of both springs 23 and 24 is improved. Can be made.

  When excessive torque is input and the compression amount of the first and second torsion springs 23 and 24 exceeds a predetermined value, the stopper claw 22a of the driven plate 22 contacts the end surface of the hole 21a of the drive plate 21, Further relative rotation of both plates 21 and 22 is prohibited. That is, further compression of the first and second torsion springs 23 and 24 is restricted. Since the circumferential length of the hole 21a is set to such a length that the first and second torsion springs 23 and 24 are not in close contact with each other as described above, excessive torque is input. However, the first and second torsion springs 23 and 24 do not come into close contact with each other.

[Other Embodiments]
(A) In the above embodiment, the present invention is applied to a lock-up device having a multi-plate type clutch mechanism, but the configuration of the clutch mechanism is not limited to this. For example, the present invention can be similarly applied to a lockup device having a single-plate type clutch mechanism. Further, the present invention can be similarly applied to a lockup device in which a friction facing is directly provided on the piston.

  (B) The arrangement of the clutch mechanism is not limited to the above embodiment. That is, a clutch mechanism may be arranged on the output side of the driven plate.

  (C) The configuration for supporting the piston and the drive rate is not limited to the above embodiment.

  (D) Although the hole 21a is formed in the drive plate 21 and the stopper claw 22a is formed in the driven plate 22 in the above embodiment, they may be formed in the opposite manner.

  (E) In the above embodiment, the torque converter 1 having the lock-up device 9 is described. However, the present invention is not limited to this, and the lock-up device 9 can be applied as long as it is a fluid torque transmission device. It is.

1 is a schematic vertical sectional view of a torque converter in which an embodiment of the present invention is employed. The figure which extracts and shows the drive plate and driven plate of FIG. FIG. 2 is a side partial view of FIG. 1. Detailed view of a sheet member.

Explanation of symbols

1 Torque converter 3 Input shaft 5 Front cover (Rotating body on the input side)
9 Lock-up device 17 Hub flange 20 Clutch mechanism 21 Drive plate (input side member)
22 Driven plate (output side member)
23 First torsion spring (elastic member)
24 Second torsion spring (elastic member)
25 Clutch part 40 Spring storage part 41 First input side locking part (input side locking part)
42 2nd input side latching | locking part (input side latching | locking part)
45 Spring facing portion 46 Output side locking portion 50 Sheet member 51 Locking portion (main body portion)
52 Projection 53 Insertion (Main Body)

Claims (8)

A lockup device that is disposed in a space between an input-side rotator and an output-side rotator of a fluid torque transmission device, and mechanically connects the input-side rotator and the output-side rotator. ,
A clutch mechanism provided in a torque transmission path between the input side and the output side rotating body;
An input side member having a plurality of input side locking portions, to which torque is input from the front cover;
An output side member having a plurality of output side locking portions and outputting torque to the output side rotating body;
A plurality of elastic members arranged between the input side and the output side engaging portion in the rotational direction, and elastically connecting the input side member and the output side member in the rotational direction;
A sheet member mounted on both ends of the elastic member,
The sheet member includes a main body portion that is attached to an end portion of the elastic member, and a protruding portion that protrudes from the main body portion in the rotation direction and is locked to one of the input side and output side locking portions,
The sheet member is restricted from moving outward in the radial direction in a state in which the protrusion is locked to one of the input side and output side locking portions.
One of the input side and output side locking portions is in contact with the center of the sheet member in the rotational direction,
A lockup device for a fluid torque transmission device. One of the input side and output side locking portions locks the protrusion so that the rotation of the sheet member can be restricted,
The lockup device of the fluid type torque transmission device according to claim 1. One of the input side and output side locking portions locks the protruding portion so as to move radially inward with respect to one of the input side and output side locking portions when the sheet member rotates. Yes,
The lockup device of the fluid type torque transmission device according to claim 1 or 2. The sheet member is provided at a position where the protrusion is eccentric,
The lockup device of the fluid type torque transmission device according to any one of claims 1 to 3. The protrusion is disposed on one radially inner side of the input side and output side locking portions,
The lockup device of the fluid type torque transmission device according to any one of claims 1 to 4. The radially outer portion of the protrusion has a tapered shape in the rotational direction.
A lockup device for a fluid torque transmission device according to any one of claims 1 to 5. The radially outer portion of the protrusion has an arcuate curved shape,
A lockup device for a fluid torque transmission device according to any one of claims 1 to 6. One radially inner end of the input side and output side locking portions has a tapered shape in the rotational direction.
A lockup device for a fluid torque transmission device according to any one of claims 1 to 7.

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