JP2007113745A - Fluid type torque transmission device and lock-up device used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce hysteresis torque in a lock-up device for a fluid type torque transmission device. <P>SOLUTION: In this lock-up device 5, a retaining plate 52 is fixed to a piston 51 to hold a first torsion spring 54 in an elastically deformable manner in a rotating direction. In this case, a support plate 90 provided in a relatively rotatable manner to the retaining plate 52 has a cylindrical first support part 91 arranged on the radially outside of the first torsion spring 54 to abut on the radially outside portion of the first torsion spring 54. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fluid torque transmission device and a lockup device used therefor, and more particularly to a fluid torque transmission device such as a torque converter and a fluid coupling and a lockup device used therefor.

  For example, a torque converter is known as a fluid torque transmission device. The torque converter is a device that has three types of impellers (impeller, turbine, and stator) inside, and transmits torque by circulation of internal hydraulic oil. The impeller is fixed to a front cover coupled to the input side rotating body. When the impeller rotates, hydraulic oil flows from the impeller toward the turbine, and the turbine rotates. As a result, torque is output from the turbine to the input shaft. Such a torque converter is often provided with a lock-up device.

  The lock-up device is mainly disposed in a space between the turbine and the front cover, and is a device for transmitting torque directly from the front cover to the turbine by mechanically connecting the front cover and the turbine. is there. The lockup device includes a piston that is movable in the axial direction and that can be connected to the front cover, a retaining plate that is fixed to the piston, a driven plate that is fixed to the turbine, and the retaining plate and the driven plate in the rotational direction. A plurality of torsion springs that are elastically connected.

In this lockup device, when hydraulic oil in the space on the axial front cover side of the piston is discharged, the hydraulic pressure in the space on the axial turbine side of the piston becomes higher than the hydraulic pressure in the space on the axial front cover side, The piston moves toward the axial front cover. As a result, the friction facing provided on the outer peripheral portion of the piston is pressed against the friction surface of the front cover, and torque is transmitted from the front cover to the retaining plate via the piston, and through the torsion spring and the driven plate, (Hereinafter, when the lockup device is connected). At this time, the torsion spring is compressed in the rotational direction between the retaining plate and the driven plate, and absorbs and attenuates torsional vibration (see, for example, Patent Document 1).
JP 2002-12221 A

  However, the torsion spring moves to the outer peripheral side by centrifugal force at the time of connection or disconnection. As a result, when the torsion spring is elastically deformed, the torsion spring and the member disposed on the outer peripheral side slide to generate a large hysteresis torque. Generation of hysteresis torque is not preferable because it inhibits torsional vibration absorption / damping by the torsion spring.

  An object of the present invention is to reduce hysteresis torque in a lockup device for a fluid torque transmission device.

  A lockup device for a fluid torque transmission device according to claim 1 is a device that is disposed between a front cover and a turbine, and mechanically connects the front cover and the turbine. A member, a first elastic member, a holding member, and a support member are provided. The piston is supported by the turbine so as to be relatively rotatable and relatively movable in the axial direction, and is disposed so as to be connectable to the front cover. The driven member is fixed to the turbine. The first elastic member elastically connects the piston and the driven member in the rotational direction. The holding member is fixed to the piston and holds the first elastic member so as to be elastically deformable in the rotation direction. The support member is provided to be rotatable relative to the holding member. The support member has a cylindrical first support portion that is disposed on the radially outer side of the first elastic member and contacts the radially outer portion of the first elastic member.

  In the conventional lockup device, when the front cover and the turbine are connected, torque input to the front cover is transmitted to the turbine via the lockup device. When the torsional vibration is input to the front cover, the torsional vibration is transmitted to the holding member via the piston. The torsional vibration transmitted to the holding member is absorbed and damped by the plurality of elastic members. At this time, since the elastic member moves to the outer peripheral side by centrifugal force, when the elastic member is elastically deformed in the rotational direction, for example, a part of the holding member and the elastic member slide, and a large hysteresis torque is generated.

  However, in this lockup device, since the support member has the first support portion, even if the first elastic member moves radially outward due to centrifugal force, the radius of the first elastic member is caused by the first support portion. Movement outward in the direction can be prevented. Since the support member is provided so as to be relatively rotatable with respect to the holding member, the first support portion rotates together with the end portion of the first elastic member when the first elastic member is elastically deformed in the rotation direction. Thereby, sliding with a 1st elastic member and a holding member can be suppressed, and a hysteresis torque can be reduced.

  The lockup device for a fluid torque transmission device according to a second aspect is the first aspect, wherein the first elastic member is disposed between the piston and the holding member in the axial direction. The support member further includes a second support portion that is disposed between the first elastic member and the piston in the axial direction and extends radially inward from an axial end portion of the first support portion.

  In this lockup device, since the support member has the second support portion, sliding between the first elastic member and the piston can be prevented. Thereby, hysteresis torque can be further reduced.

  According to a third aspect of the present invention, in the lockup device for a fluid torque transmission device according to the second aspect, the second support portion is an annular plate portion.

  In this lockup device, since the second support part is an annular part, the strength of the support member is improved.

  A lockup device for a fluid torque transmission device according to a fourth aspect of the present invention is the lockup device according to any one of the first to third aspects, further comprising a plurality of second elastic members for elastically connecting the piston and the driven member in the rotational direction. It has more. The first elastic member is arranged so as to act in parallel on the inner peripheral side of the second elastic member.

  In this lockup device, since the first elastic member is disposed on the inner peripheral side of the second elastic member, the centrifugal force acting on the first elastic member is reduced. As a result, the load on the peripheral member of the first elastic member can be reduced, and the torsional characteristics can be improved as compared with the prior art by setting the outer shape, length, etc. of the first elastic member larger. Further, since the centrifugal force acting on the support member itself and the load on the radially outer side from the first elastic member are reduced, the support member can be prevented from being damaged.

  The lockup device for a fluid torque transmission device according to claim 5 is the lockup device for fluid torque transmission device according to any one of claims 1 to 4, wherein a plurality of first elastic members are provided between a part of the holding member and a part of the driven member in the rotational direction. Are arranged to act in series. The support member further includes a plurality of intermediate engagement portions disposed between the ends of the plurality of first elastic members.

  When the front cover and the turbine are connected by the lockup device, the piston and the turbine rotate relative to each other. When the piston and the turbine rotate relative to each other, the first elastic member is compressed between a part of the holding member and a part of the driven member. At this time, since the intermediate engagement portion of the support member is disposed between the end portions of the first elastic member, when the first elastic member is compressed and the end portion of the first elastic member moves in the rotation direction, Accordingly, the intermediate engaging portion also moves in the rotational direction. That is, the support member rotates in accordance with the compressed state of the first elastic member. Accordingly, the support member can surely suppress sliding between the radially outer portion of the end portion of the first elastic member and the piston and the holding member, and the hysteresis torque can be more reliably reduced. Further, in this lockup device, since the plurality of first elastic members are arranged in series between the rotation directions of the holding member and the driven member, the rigidity of the damper function can be reduced.

  The lockup device for a fluid torque transmission device according to claim 6 is the lockup device for fluid type torque transmission device according to any one of claims 1 to 5, wherein the holding member is an annular holding member body, a plurality of rotational direction engaging portions, and a plurality of radial directions. And an engaging portion. The rotation direction engaging portion extends radially inward from the inner peripheral portion of the holding member main body, and supports the end portion of the first elastic member in the rotation direction. The radial engagement portion is disposed adjacent to the rotation direction engagement portion and extends radially inward from the inner peripheral portion of the holding member main body.

  When the holding member and the driven member rotate relative to each other and the first elastic member is compressed, the rotation direction engaging portion and the end portion of the first elastic member abut on each other in the rotation direction. At this time, since the first elastic member moves to the outer peripheral side by centrifugal force, the end portion of the first elastic member and the first support portion of the support member may slide. However, in this lockup device, since the holding member has the radial engagement portion, the radial engagement portion and the radially outer portion of the first elastic member abut on each other in the radial direction, and the first elastic member It can prevent that the edge part of this moves to the radial direction outer side. Thereby, sliding with the edge part of a 1st elastic member and the 1st support part of a support member can be suppressed, and a hysteresis torque can be reduced.

  According to a seventh aspect of the present invention, in the lockup device for a fluid torque transmission device according to the sixth aspect, at least a part of the radial engagement portion is disposed radially inward of the first support portion.

  In this lockup device, sliding between the end portion of the first elastic member and the first support portion of the support member can be more reliably suppressed.

  The lockup device for a fluid torque transmission device according to claim 8 is the lockup device for fluid type torque transmission device according to claim 6 or 7, wherein the contact position with the first elastic member is increased as the radial engagement portion moves toward the rotation direction engagement portion. It has a tapered shape that moves to the inner peripheral side.

  In this lockup device, sliding between the end portion of the first elastic member and the first support portion of the support member can be more reliably suppressed.

  According to a ninth aspect of the present invention, in the lockup device for a fluid torque transmission device according to any one of the sixth to eighth aspects, the support member has a notch portion formed at an axial end portion of the first support portion. . The rotation direction engaging part penetrates the notch part in the radial direction.

  In this lockup device, since the rotation direction engaging portion penetrates the notch portion in the axial direction, it is not necessary to bend the holding member so as to avoid the first support portion. Thereby, the bending process of a holding member can be reduced and reduction of manufacturing cost can be aimed at.

  The lockup device for a fluid torque transmission device according to claim 10 is the lockup device according to any one of claims 1 to 5, wherein the holding member is an annular holding member body, a plurality of rotational direction engaging portions, and a first support portion. And a second support part. The rotation direction engaging portion extends radially inward from the inner peripheral portion of the holding member main body, and supports the end portion of the first elastic member in the rotation direction. The first support portion is disposed adjacent to the rotation direction engaging portion, and supports the radially outer side and the axial turbine side portion of the first elastic member. The second support portion is disposed adjacent to the rotation direction engaging portion, and supports the radially outer side and axial front cover side portion of the first elastic member.

  In this lockup device, since the holding member has the first and second support portions, the end portion of the first elastic member can be supported in the radial direction and the axial direction. Thereby, sliding with the edge part of a 1st elastic member and the 1st support part of a support member can be suppressed, and a hysteresis torque can be reduced.

  A lockup device for a fluid torque transmission device according to an eleventh aspect of the present invention further includes an annular auxiliary plate fixed to the piston according to any one of the first to fifth aspects. The holding member has an annular holding member body, a plurality of rotation direction engaging portions, and a first support portion. The rotation direction engaging portion extends radially inward from the inner peripheral portion of the holding member main body, and supports the end portion of the first elastic member in the rotation direction. The first support portion is disposed adjacent to the rotation direction engaging portion, and supports the radially outer side and the axial turbine side portion of the first elastic member. The auxiliary plate has a second support portion that is arranged around the rotation direction engaging portion and supports the outer side in the radial direction of the first elastic member and the axial front cover side portion.

  In this lockup device, since the holding member has the first support portion and the auxiliary plate has the second support portion, the end portion of the first elastic member can be supported in the radial direction and the axial direction. Thereby, sliding with the edge part of a 1st elastic member and the 1st support part of a support member can be suppressed, and a hysteresis torque can be reduced.

  According to a twelfth aspect of the present invention, in the lockup device for a fluid torque transmission device according to the tenth or eleventh aspect, at least a part of the first support portion is disposed radially inward of the first support portion. At least a part of the second support part is disposed radially inward of the first support part.

  In this lockup device, the end portion of the first elastic member can be supported on the inner peripheral side with respect to the first support portion, so that the end portion of the first elastic member and the first support portion of the support member slide. Can be more reliably suppressed.

  The lockup device for a fluid torque transmission device according to claim 13 is the lockup device according to any one of claims 10 to 12, wherein the first support member comes into contact with the first elastic member as it moves toward the engagement portion in the rotational direction. It has a tapered shape whose position moves to the inner peripheral side. The second support portion has a tapered shape in which the contact position with the first elastic member moves toward the inner peripheral side as going to the rotation direction engaging portion side.

  In this lockup device, sliding between the end portion of the first elastic member and the first support portion of the support member can be more reliably suppressed. Further, when the compression of the first elastic member is released, the end portion of the first elastic member pushed by a part of the driven member is easily returned to the original state.

  The lockup device for a fluid type torque transmission device according to claim 14 is the lockup device for fluid type torque transmission device according to any one of claims 1 to 13, wherein the holding member is disposed on the outer peripheral side of the first support portion and extends radially inward. have.

  A large centrifugal force acts on each member during high-speed rotation. Therefore, the first support portion of the support member is greatly deformed to the outer peripheral side by centrifugal force. However, in this lockup device, since the holding member has a protrusion, when the first support portion of the support member is greatly deformed to the outer peripheral side due to centrifugal force, the first support portion is pressed from the outer peripheral side by the protrusion. be able to. Thereby, the rotational strength of a support member can be improved.

The lockup device for a fluid torque transmission device according to claim 15 is the lockup device according to any one of claims 1 to 13, wherein the holding member is disposed on the inner peripheral side of the first support portion and extends radially outward. Has a part.

  In this lockup device, the support member can be positioned with respect to the holding member by the protrusion.

  A lockup device for a fluid torque transmission device according to a sixteenth aspect according to any one of the first to fifteenth aspects, wherein the holding member has a first annular accommodating portion that accommodates the first support portion in the axial direction. .

  In this lockup device, since the holding member has the first annular housing portion, the first support portion is supported by the first annular housing portion when the first support portion of the support member is largely deformed to the outer peripheral side by centrifugal force. Can be pressed from the outer peripheral side. Thereby, the rotational strength of a support member can be improved.

  The fluid torque transmission device lockup device according to claim 17 is the lockup device for fluid type torque transmission device according to any one of claims 1 to 16, wherein the piston has a second annular housing portion that houses a part of the support member in the axial direction. .

  In this lockup device, since the piston has the second annular housing portion, the first support portion is supported by the second annular housing portion when the first support portion of the support member is greatly deformed to the outer peripheral side by centrifugal force. It can be pressed from the outer peripheral side. Thereby, the rotational strength of a support member can be improved.

  The lockup device for a fluid torque transmission device according to claim 18 is the lockup device for fluid type torque transmission according to any one of claims 1 to 17, wherein the holding member is disposed on the outer peripheral side of the first support portion and accommodates the second elastic member. Has a part.

  The lockup device for a fluid torque transmission device according to claim 19 is the lockup device according to any one of claims 1 to 18, wherein the driven member is an annular driven member main body, and the first elastic member extends radially inward from the driven member main body. And a plurality of first output engaging portions that support the end portions in the rotation direction.

  In the conventional lock-up device, the claw portion of the driven member extends radially outward, so the circumferential dimension of the portion where the claw portion abuts against the elastic member is larger than the circumferential dimension of the root portion of the claw portion. Becomes larger. Therefore, when the strength of the root portion of the claw portion is taken into consideration, the circumferential dimension of the entire claw portion becomes large, and it is difficult to employ an elastic member having a long free length.

  However, in this lockup device, since the first output engagement portion extends radially inward from the driven member main body, the first elastic member is in contact with the first elastic member rather than the circumferential dimension of the root portion of the first output engagement portion. The circumferential dimension of the contacting part is smaller. As a result, the strength of the root portion can be secured even if the circumferential dimension of the entire first output engagement portion is set small. Thereby, a 1st elastic member with a long free length can be employ | adopted, and a twist characteristic can be improved.

  The lockup device for a fluid torque transmission device according to claim 20 is the lockup device for a fluid torque transmission device according to claim 19, wherein the driven member extends radially outward from the outer peripheral portion of the driven member main body and supports the end of the second elastic member in the rotational direction. A plurality of second output engaging portions are provided.

  A lockup device for a fluid torque transmission device according to claim 21 is a device that is disposed between a front cover and a turbine and mechanically connects the front cover and the turbine, and includes a piston, a driven A member, a first elastic member, a holding member, and a support member are provided. The piston is supported by the turbine so as to be relatively rotatable and relatively movable in the axial direction, and is disposed so as to be connectable to the front cover. The driven member is fixed to the turbine. The first elastic member elastically connects the piston and the driven member in the rotational direction. The holding member is fixed to the piston and holds the first elastic member so as to be elastically deformable in the rotation direction. The holding member includes an annular holding member main body, a plurality of rotating direction engaging portions extending inward in the radial direction from an inner peripheral portion of the holding member main body, and supporting an end portion of the first elastic member in the rotating direction; And a radial engagement portion that is arranged adjacent to the portion and extends radially inward from the inner peripheral portion of the holding member main body.

  When the holding member and the driven member rotate relative to each other and the first elastic member is compressed, the rotation direction engaging portion and the end portion of the first elastic member abut on each other in the rotation direction. At this time, since the first elastic member moves to the outer peripheral side by centrifugal force, the end portion of the first elastic member and the outer peripheral side member may slide. However, in this lockup device, since the holding member has the radial engagement portion, the radial engagement portion and the radially outer portion of the first elastic member abut on each other in the radial direction, and the first elastic member It can prevent that the edge part of this moves to the radial direction outer side. Thereby, sliding with the edge part of an 1st elastic member and an outer peripheral side member can be suppressed, and a hysteresis torque can be reduced.

  According to a twenty-second aspect of the present invention, the lockup device for a fluid torque transmission device further includes a support member provided in the twenty-first aspect so as to be rotatable relative to the holding member. The support member has a cylindrical first support portion that is disposed on the radially outer side of the first elastic member and contacts the radially outer portion of the first elastic member.

  In this lockup device, sliding between the end portion of the first elastic member and the outer peripheral side member can be reliably suppressed by the first support portion of the support member. Thereby, a hysteresis torque can be reduced more reliably.

  A fluid type torque transmission device according to claim 23 is provided between a front cover, an impeller that forms a fluid chamber together with the front cover, a turbine disposed opposite to the impeller in the fluid chamber, and the front cover and the turbine. The lockup device according to any one of claims 1 to 22 is provided.

  Since this fluid torque transmission device includes the lockup device according to any one of claims 1 to 22, the hysteresis torque can be reduced.

  In the lockup device of the fluid torque transmission device according to the present invention, since the support member having the above-described configuration is provided, sliding between the end portion of the first elastic member and the outer peripheral member can be suppressed. Hysteresis torque can be reduced.

  Hereinafter, an embodiment of a lockup device of a fluid torque transmission device according to the present invention will be described based on the drawings.

1. 1. First Embodiment (1) Overall Structure of Torque Converter FIG. 1 shows a schematic longitudinal sectional view of a torque converter 1 in which a lockup device as a first embodiment of the present invention is adopted. 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 the figure. Further, OO shown in FIG. 1 is a rotation axis of the torque converter 1.

  The torque converter 1 is a device for transmitting torque from an engine-side crankshaft (not shown) to an input shaft of a transmission, and includes a front cover 2 fixed to an input-side member and three types of impellers ( A torque converter main body 3 including an impeller 9, a turbine 10, and a stator 11) and a lockup device 5 are included.

  The front cover 2 is a disk-shaped member, and mainly includes a cover disk portion 8a and an outer peripheral cylindrical portion 8b that is formed on the outer periphery of the cover disk portion 8a and protrudes toward the axial transmission side. is doing. The outer peripheral cylindrical portion 8b is fixed to the impeller shell 12 of the impeller 9 by welding.

  The impeller 9 includes an impeller shell 12, a plurality of impeller blades 13 fixed inside the impeller shell 12, and a cylindrical impeller hub 21 provided on the inner peripheral side of the impeller shell 12.

  The turbine 10 is disposed to face the impeller 9 in the fluid chamber. The turbine 10 includes a turbine shell 14, a plurality of turbine blades 15 fixed to the turbine shell 14, and a turbine hub 16 fixed to the inner peripheral side of the turbine shell 14. The turbine hub 16 has a flange 16 a extending to the outer peripheral side, and the inner peripheral portion of the turbine shell 14 is fixed to the flange 16 a by a plurality of rivets 17 together with a driven plate 53 described later. An input shaft of a transmission (not shown) is spline-engaged with the cylindrical portion 16b of the turbine hub 16.

  The stator 11 is a mechanism for rectifying hydraulic fluid that is disposed between the impeller 9 and the inner peripheral portion of the turbine 10 and returns from the turbine 10 to the impeller 9. The stator 11 is mainly composed of an annular stator carrier 18 and a plurality of stator blades 19 provided on the outer peripheral surface thereof. The stator carrier 18 is supported by a fixed shaft (not shown) via a one-way clutch 20. A first thrust bearing 31 is provided between the front cover 2 and the turbine hub 16 in the axial direction, and a second thrust bearing 32 is provided between the turbine hub 16 and the stator 11, so that the stator 11 and the impeller hub are provided. A third thrust bearing 33 is provided between the first thrust bearing 21 and the second thrust bearing 33. In each of the thrust bearings 31 to 33, a port through which hydraulic oil can flow in the radial direction is formed.

(2) Structure of the lockup device The lockup device 5 functions as a clutch mechanism 6 that can be connected to the front cover 2 and as a damper mechanism 7 that elastically connects the clutch mechanism 6 and the turbine 10 in the rotational direction. This is a device for mechanically connecting the front cover 2 and the turbine 10 as necessary. The lockup device 5 mainly includes a piston 51 and a retaining plate 52 (holding member) to which torque is input from the front cover 2, a driven plate 53 (driven member), and a first torsion spring 54 (first elastic member). ) And a second torsion spring 56 (second elastic member). In the lockup device 5 of the present embodiment, the clutch mechanism 6 is composed of a piston 51, and the damper mechanism 7 includes a retaining plate 52, a driven plate 53, first and second torsion springs 54, 56, and the like. , And a support plate 90 (support member). Hereinafter, the lockup device 5 will be described with reference to FIGS.

  Here, FIG. 2 is a schematic plan view of the lockup device 5 as viewed from the transmission side, and the driven plate 53 is not drawn. 2 is a plan view in which the retaining plate 52 is not drawn, and the left half is a plan view in which the retaining plate 52 is drawn. 3 is a schematic cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is a schematic cross-sectional view taken along the line BB in FIG.

<Piston>
The piston 51 is a member that can approach or separate from the cover disk portion 8 a of the front cover 2 by controlling the hydraulic pressure in the torque converter body 3. The piston 51 is mainly composed of a disk-shaped piston main body 61.

  As shown in FIG. 1, the piston main body 61 is a disk-shaped member extending in the radial direction so as to divide the space between the front cover 2 and the turbine 10 in the axial direction. An annular and flat pressing portion 62 is formed on the outer peripheral portion of the piston main body 61. A friction facing 63 is fixed to the surface of the pressing portion 62 on the axial direction engine side.

  As shown in FIG. 3, an outer peripheral cylindrical portion 64 extending toward the axial transmission side is provided on the outer peripheral edge of the pressing portion 62. Further, an inner peripheral cylindrical portion 66 extending toward the axial engine side is provided on the inner peripheral edge of the piston main body 61. The piston 51 is supported by the cylindrical portion 16b of the turbine hub 16 via the inner peripheral cylindrical portion 66 so as to be movable in the axial direction and the rotational direction. A seal ring 67 is provided between the inner peripheral cylindrical portion 66, the cylindrical portion 16b, and the radial direction.

  With these configurations, a space S <b> 1 is formed between the front cover 2 and the piston 51, and a space S <b> 2 is formed on the transmission side of the piston 51. The inner periphery of the space S1 communicates with an oil passage formed on an input shaft (not shown) through a port formed in the first thrust bearing 31. The inner peripheral portions of the spaces S1 and S2 are sealed by a seal ring 67.

<Retaining plate>
The retaining plate 52 holds the plurality of first and second torsion springs 54 and 56 arranged on different circumferences on the piston 51 side and supports the end of the second torsion spring 56 in the rotation direction. It is a member. The retaining plate 52 is disposed on the radially inner side of the outer peripheral cylindrical portion 64 of the piston 51.

  The retaining plate 52 is an annular member disposed along the surface of the piston main body 61 on the axial transmission side, and is fixed to the piston main body 61 by a plurality of rivets 79 (see FIGS. 2 and 3). ). The retaining plate 52 mainly includes an annular portion 70 (holding member main body), a plurality of first holding portions 76, and a plurality of second holding portions 71.

  The annular portion 70 is an annular portion that constitutes a main portion of the retaining plate 52, and is fixed to the piston main body 61 by a rivet 79.

  The first holding portion 76 is a portion for holding a later-described first torsion spring 54 so as to be elastically deformable in the rotational direction, and is arranged side by side in the rotational direction on the inner peripheral side of the annular portion 70. Specifically, the first holding part 76 mainly includes a rotation direction engaging part 78, a first outer peripheral holding part 77, and a first inner peripheral holding part 72.

  The rotation direction engaging portion 78 is a portion extending radially inward from the inner peripheral portion of the annular portion 70, and is attached to an end portion of the first torsion spring 54 (more specifically, an end portion of the first torsion spring 54). The end of the spring seat 57) is disposed so as to be supported in the rotational direction. The axial position of the rotation direction engaging portion 78 and the axial position of the center of the first torsion spring 54 substantially coincide with each other. Further, the rotation direction engaging portion 78 is formed with a plurality of protrusions 87 arranged on the inner peripheral side of the first support portion 91 of the support plate 90 described later and extending outward in the radial direction.

  The first outer periphery holding part 77 is a part for restricting the movement of the first torsion spring 54 toward the axial transmission side, and extends radially inward and axially from the inner peripheral side of the annular part 70. The first inner circumference holding portion 72 connects the radially inner end of the rotation direction engaging portion 78 in the rotation direction, and is bent in the axial direction as shown in FIGS. 3 and 4.

  The piston main body 61 has a second annular housing portion 61a that swells toward the axial engine side. A plurality of first torsion springs 54 are arranged between the second annular housing portion 61 a and the first holding portion 76 in the axial direction. A pair of first torsion springs 54 arranged in series in the rotational direction are held between the piston 51 and the first holding portions 76 so as to be elastically deformable.

Further, radial engagement portions 80 are formed at both ends of the rotation direction engagement portion 78 in the rotation direction. FIG. 5 shows a partial plan view around the radial engagement portion 80. As shown in FIG. 5, the radial engagement portion 80 is disposed adjacent to both sides in the rotation direction of the rotation direction engagement portion 78 and extends radially inward from the inner peripheral portion of the annular portion 70. . The radial engagement portion 80 is in contact with at least one of the first torsion spring 54 and the spring seat 57 in the radial direction. A radially inner end portion of the radial engagement portion 80 is disposed radially inward from a first support portion 91 of a support plate 90 described later. More specifically, as shown in FIG. 5, a gap L ₁ is formed between the radial inner end surface of the radial engagement portion 80 and the inner peripheral surface of the first support portion 91. . That is, the end portion of the first torsion spring 54 is supported by the radial engagement portion 80 on the inner peripheral side of the first support portion 91. The radial engagement portion 80 has a tapered shape in which the contact position with the first torsion spring 54 moves toward the inner peripheral side as it goes to the adjacent rotation direction engagement portion 78 side. As shown in FIG. 5, a gap L < _b > ₂ is formed between the protrusion 87 and the first support 91 in the radial direction.

  The second holding portion 71 is a portion extending radially outward from the outer peripheral portion of the annular portion 70, and a second torsion spring 56 is arranged between the pressing portion 62 of the piston 51 and the second holding portion 71. Yes. The second holding part 71 has a second window hole part 73, a second outer peripheral holding part 74, and an inner peripheral holding part 75. A second torsion spring 56 is held in the second window hole 73 so as to be elastically deformable in the rotational direction.

  With these configurations, the first torsion spring 54 and the second torsion spring 56 are held between the piston 51 and the retaining plate 52 so as to be elastically deformable in the rotational direction.

<Driven plate>
The driven plate 53 is a member for supporting end portions of the first and second torsion springs 54 and 56 (more precisely, a spring seat 57 described later in the case of the first torsion spring 54) in the rotation direction. 6 is a plan view of the driven plate 53, and FIG. 7 is a sectional view taken along the line CC in FIG.

  The driven plate 53 is an annular member disposed on the axial transmission side of the piston 51 and is fixed by the rivet 17 that penetrates the plurality of holes 85 together with the turbine 10 described above. As shown in FIGS. 6 and 7, the driven plate 53 mainly includes a driven plate body 81, a plurality of first output engagement portions 82, and a plurality of second output engagement portions 83.

  The driven plate body 81 is an annular member that constitutes the main part of the driven plate 53. The first output engagement portion 82 is a portion that extends radially inward from the periphery of the driven plate main body 81 and supports the end portion of the first torsion spring 54 in the rotational direction. The first output engagement portion 82 has a substantially sector shape, and the root portion of the first output engagement portion 82 is more circular than the tip portion of the first output engagement portion 82 or the portion that contacts the first torsion spring 54. The circumferential dimension is large. The second output engaging portion 83 is a portion extending radially outward from the outer peripheral portion of the driven plate body 81, and is disposed so as to be able to support the end portion of the second torsion spring 56 in the rotational direction. In the present embodiment, a gap is set between the end portion of the second torsion spring 56 and the second output engagement portion 83, and the timings at which the first torsion spring 54 and the second torsion spring 56 operate are shifted. ing. Further, a pair of first torsion springs 54 are arranged in series between the first output engagement portion 82 and the rotation direction engagement portion 78.

<First and second torsion springs>
The first and second torsion springs 54, 56 are for absorbing and attenuating minute torsional vibrations caused by fluctuations in engine rotation and vibrations caused by shocks when the lockup device 5 is connected. In the present embodiment, the first and second torsion springs 54 and 56 are composed of two types of coil springs having different diameters. The first torsion spring 54 is provided in the first holding portion 76 of the retaining plate 52. The second torsion spring 56 is provided in the second holding portion 71 of the retaining plate 52. In the present embodiment, a pair of spring seats 57 are attached to both ends of the first torsion spring 54 in the rotational direction.

  As apparent from FIGS. 2 and 3, the first torsion spring 54 is disposed on the inner peripheral side of the second torsion spring 56. The first torsion spring 54 and the second torsion spring 56 are arranged so as to act in parallel between the piston 51 and the driven plate 53.

<Support plate>
In addition to the configuration described above, in the lockup device 5 according to the present invention, a support plate 90 is disposed around the first torsion spring 54. Specifically, the support plate 90 is an annular member disposed so as to be relatively rotatable between the axial directions of the piston 51 and the retaining plate 52, and includes a first support portion 91, a second support portion 92, It is comprised from the intermediate engaging part 93. FIG.

  The first support portion 91 is a cylindrical portion that is disposed on the outer side in the radial direction of the first torsion spring 54 and abuts in the radial direction with the outer portion in the radial direction of the first torsion spring 54. A plurality of notches 91a arranged in parallel in the rotational direction are formed at the end of the first support 91 on the transmission side in the axial direction. The aforementioned rotational direction engaging part 78 and radial direction engaging part 80 penetrate the notch 91a in the radial direction.

  The second support portion 92 is disposed between the first torsion spring 54 and the piston main body 61 of the piston 51 in the axial direction, and extends inward in the radial direction from the end of the first support portion 91 on the axial engine side. Part. Since the second support portion 92 is an annular portion, the strength of the support plate 90, particularly the strength of the first support portion 91 is improved.

  The intermediate engagement portion 93 is a protruding portion that is bent from the inner peripheral portion of the second support portion 92 outward in the axial direction and the radial direction, and is a pair of first torsion springs housed in one first holding portion 76. 54 is sandwiched between the ends.

  With these configurations, the first and second torsion springs 54 and 56 arranged on different circumferences can elastically connect the piston 51 and the driven plate 53 in the rotation direction via the retaining plate 52. It has become.

(3) Operation of Torque Converter Next, the operation of the torque converter 1 will be described with reference to FIGS.

  Torque from the crankshaft on the engine side is input to the front cover 2 via a flexible plate (not shown). As a result, the impeller 9 rotates and the hydraulic oil flows from the impeller 9 to the turbine 10. The turbine 10 rotates by the flow of the hydraulic oil, and the torque of the turbine 10 is output to an input shaft (not shown).

  When the speed ratio of the torque converter 1 increases and the input shaft reaches a constant rotational speed, the hydraulic oil in the space S1 is discharged through the oil passage inside the input shaft. As a result, the hydraulic pressure in the space S2 on the axial turbine 10 side of the piston 51 becomes higher than the hydraulic pressure in the space S1 on the axial front cover 2 side, and the piston 51 moves to the front cover 2 side. As a result, the piston 51 moves to the front cover 2 side, and the friction facing 63 is pressed against the friction surface of the front cover 2. As a result, the torque of the front cover 2 is transmitted to the piston 51 and the retaining plate 52 and is output to the turbine 10 via the first and second torsion springs 54 and 56 and the driven plate 53.

  When torsional vibration is input to the front cover 2 when the lockup device 5 is connected, the piston 51, the retaining plate 52, and the driven plate 53 rotate relative to each other, and the first torsion spring 54 is rotated up to a predetermined angle. Is compressed in the direction of rotation. When the relative rotation angle between the piston 51, the retaining plate 52, and the driven plate 53 becomes a predetermined angle or more, both the first and second torsion springs 54, 56 are compressed in the rotation direction. At this time, the support plate 90 is disposed between the piston 51 and the retaining plate 52 in the axial direction so as to be relatively rotatable, and the first torsion spring 54 is covered with the first support portion 91 of the support plate 90 in the radial direction. ing. Therefore, even if the first torsion spring 54 moves outward in the radial direction due to centrifugal force, the first support portion 91 can prevent the first torsion spring 54 from moving outward in the radial direction. Since the intermediate engagement portion 93 is sandwiched between the pair of first torsion springs 54, the support plate is opposed to the piston 51 and the retaining plate 52 when the first torsion spring 54 is compressed in the rotational direction. 90 rotates relative to the compression direction. Therefore, sliding between the first torsion spring 54, the piston 51, and the retaining plate 52 can be suppressed as compared with the case where the support plate 90 is not provided, and the hysteresis torque can be reduced.

  Further, in this lockup device 5, since the support plate 90 has the second support portion 92, sliding between the first torsion spring 54 and the piston 51 can be prevented. Thereby, hysteresis torque can be further reduced.

  Further, since the first torsion spring 54 is disposed on the radially inner side of the second torsion spring 56, the influence of the centrifugal force on the first torsion spring 54 is reduced. Thereby, since the load on the peripheral members of the first torsion spring 54 is small, the outer shape, the length, etc. of the first torsion spring 54 can be set larger to improve the torsional characteristics than before. Further, since the influence of the centrifugal force on the first support portion 91 of the support plate 90 is reduced, the support plate 90 can be prevented from being damaged.

  Further, in the lockup device 5, when the retaining plate 52 and the driven plate 53 rotate relative to each other and the first torsion spring 54 is compressed, the rotation direction engaging portion 78 and the end of the first torsion spring 54 are Abuts in the rotational direction. At this time, since the first torsion spring 54 moves to the outer peripheral side by centrifugal force, the end portion of the first torsion spring 54 and the first support portion 91 of the support plate 90 may slide. However, in this lockup device 5, since the retaining plate 52 has the radial engagement portion 80, the radial engagement portion 80 and the radially outer portion of the first torsion spring 54 contact each other in the radial direction. In contact, the end of the first torsion spring 54 can regulate the outward movement in the radial direction. That is, the end portion of the first torsion spring 54 can be supported on the inner peripheral side with respect to the first support portion 91. Thereby, sliding with the edge part of the 1st torsion spring 54 and the 1st support part 91 of support plate 90 can be controlled, and a hysteresis torque can be reduced. In particular, sliding between the end portion of the first torsion spring 54 on the side in contact with the radial engagement portion 80 and the first support portion 91 in a state where the retaining plate 52 and the driven plate 53 are rotating relative to each other. Can be effectively suppressed, and the hysteresis torque can be reduced.

(4) Operational effects of the present invention The operational effects of the lockup device 5 according to the present invention are summarized below.

1) Effects of Support Plate 90 In this lockup device 5, the first support portion 91 of the support plate 90 covers the radially outer side of the first torsion spring 54. Therefore, even if the first torsion spring 54 moves outward in the radial direction due to centrifugal force, the first support portion 91 can prevent the first torsion spring 54 from moving outward in the radial direction. Since the intermediate engagement portion 93 is sandwiched between the pair of first torsion springs 54, the support plate is opposed to the piston 51 and the retaining plate 52 when the first torsion spring 54 is compressed in the rotational direction. 90 rotates relative to the compression direction. Therefore, sliding between the first torsion spring 54, the piston 51, and the retaining plate 52 can be suppressed as compared with the case where the support plate 90 is not provided, and the hysteresis torque can be reduced.

  Further, in this lockup device 5, since the support plate 90 has the second support portion 92, sliding between the first torsion spring 54 and the piston 51 can be prevented. Thereby, hysteresis torque can be further reduced.

2) Effects of Retaining Plate 52 In this lockup device 5, when the retaining plate 52 and the driven plate 53 rotate relative to each other and the first torsion spring 54 is compressed, the rotational direction engaging portion 78 and the first The end of the torsion spring 54 abuts in the rotational direction. At this time, since the first torsion spring 54 moves to the outer peripheral side by centrifugal force, the end portion of the first torsion spring 54 and the first support portion 91 of the support plate 90 may slide. However, in this lockup device 5, since the retaining plate 52 has the radial engagement portion 80, the radial engagement portion 80 and the radially outer portion of the first torsion spring 54 contact each other in the radial direction. In contact, the end of the first torsion spring 54 can regulate the outward movement in the radial direction. That is, the end portion of the first torsion spring 54 can be supported on the inner peripheral side with respect to the first support portion 91. Thereby, sliding with the edge part of the 1st torsion spring 54, and outer peripheral side members, such as the 1st support part 91 of support plate 90, can be controlled, and a hysteresis torque can be reduced. In particular, sliding between the end portion of the first torsion spring 54 on the side in contact with the radial engagement portion 80 and the first support portion 91 in a state where the retaining plate 52 and the driven plate 53 are rotating relative to each other. Can be effectively suppressed, and the hysteresis torque can be reduced.

  Moreover, in this lockup device 5, since the rotation direction engaging part 78 has penetrated the notch part 91a to the axial direction, it is not necessary to bend the retaining plate 52 so that the 1st support part 91 may be avoided. Thereby, the bending process of the retaining plate 52 can be reduced and the manufacturing cost can be reduced.

  Further, in this lockup device 5, since the piston has the second annular accommodating portion 61a, the second annular accommodating portion 61a when the first support portion 91 of the support plate 90 is largely deformed to the outer peripheral side by centrifugal force. Thus, the first support portion 91 can be pressed from the outer peripheral side. Thereby, the rotational strength of the support plate 90 can be improved.

  In the lockup device 5, the support plate 90 can be positioned with respect to the retaining plate 52 by the protrusion 87.

3) Effects of arrangement of springs In this lockup device 5, since the first torsion spring 54 is disposed radially inward of the second torsion spring 56, the influence of centrifugal force on the first torsion spring 54 is small. Become. Thereby, since the load on the peripheral members of the first torsion spring 54 is small, the outer shape, the length, etc. of the first torsion spring 54 can be set larger to improve the torsional characteristics than before. Further, since the influence of the centrifugal force on the first support portion 91 of the support plate 90 is reduced, the support plate 90 can be prevented from being damaged.

4) Effects of the driven plate 53 In the conventional lockup device, since the claw portion of the driven member extends radially outward, the claw portion abuts on the elastic member more than the circumferential dimension of the root portion of the claw portion. The circumferential dimension of the part is larger. Therefore, when the strength of the root portion of the claw portion is taken into consideration, the circumferential dimension of the entire claw portion becomes large, and it is difficult to employ an elastic member having a long free length.

  However, in this lockup device 5, since the first output engagement portion 82 extends radially inward from the driven plate body 81, the first output engagement portion 82 is more than the circumferential dimension of the root portion of the first output engagement portion 82. The circumferential dimension of the portion in contact with the torsion spring 54 is smaller. As a result, the strength of the root portion can be ensured even if the circumferential dimension of the entire first output engagement portion 82 is set small. Thereby, the 1st torsion spring 54 with a long free length can be employ | adopted, and a twist characteristic can be improved.

2. Second Embodiment In addition to the first embodiment described above, the following embodiment is also conceivable. FIG. 8 is a schematic plan view of a lock-up device 105 as a second embodiment of the present invention, and FIG. 9 is a sectional view taken along the line DD in FIG.

  In the lock-up device 105 according to the second embodiment, the retaining plate 152 includes a first annular housing portion 186 that houses the first support portion 191 in the axial direction. Specifically, the first annular portion 170 is positioned closer to the axial engine side than the distal end portion of the first support portion 191, and the first annular accommodating portion 186 is bent in the axial direction and the radial direction. The first annular housing portion 186 is a portion extending inward in the axial direction and the radial direction from the inner peripheral portion of the first annular portion 170, and is formed by being bent.

  In the lock-up device 105, the protrusion 87 of the first embodiment is disposed on the outer peripheral side of the first support portion 191 of the support plate 190. Specifically, the retaining plate 152 has a plurality of protrusions 187 extending radially inward from the inner peripheral portion of the first annular portion 170. The protruding portion 187 is disposed on the outer peripheral side of the first support portion 191 of the support plate 190. A gap is provided between the distal end portion of the protruding portion 187 and the outer peripheral surface of the first support portion 191 in the radial direction.

  In this lockup device 5, a large centrifugal force acts on each member during high-speed rotation. Therefore, the first support portion 191 of the support plate 190 is greatly deformed to the outer peripheral side by centrifugal force. At this time, since the retaining plate 152 has the protruding portion 187, when the first support portion 191 of the support plate 190 is largely deformed to the outer peripheral side by centrifugal force, the protruding portion 187 causes the first support portion 191 to be Can be pressed from the side. Thereby, the rotational strength of the support plate 190 can be improved.

3. Third Embodiment In addition to the above-described embodiments, the following embodiments are also conceivable. FIG. 10 is a schematic plan view of a lockup device 205 as a third embodiment of the present invention, and FIG. 11 is a cross-sectional view taken along line EE of FIG.

  In the second embodiment described above, there is no portion that supports the end portion of the first torsion spring 54 in the radial direction unlike the radial engagement portion 80 of the first embodiment. Therefore, in this embodiment, the configuration of the radial engagement portion 80 of the first embodiment is applied to the configuration of the second embodiment. Specifically, the lockup device 205 of the third embodiment further includes an auxiliary plate 295 between the piston 51 and the retaining plate 252. Specifically, as shown in FIGS. 10 and 11, the auxiliary plate 295 includes an auxiliary plate body 297 and a third outer peripheral holding portion 296 (second support portion). The auxiliary plate body 297 is an annular portion, and is fixed by a rivet 79 together with the piston 51 and the retaining plate 252. The third outer periphery holding portion 296 is a portion that extends inward in the axial direction and radially inward from the inner peripheral portion of the auxiliary plate main body 297, and penetrates the hole 294 of the support plate 290 in the axial direction. The third outer periphery holding part 296 is arranged in the rotational direction in the same phase as the rotational direction engaging part 278 of the retaining plate 252, and the dimension in the rotational direction is set larger than that of the rotational direction engaging part 278. Yes. That is, as shown in FIG. 10, the third outer periphery holding portion 296 is in the radial direction of the end portion of the first torsion spring 54 with the first torsion spring 54 in contact with the rotation direction engaging portion 278 in the rotation direction. The outer portion, more specifically, the first torsion spring 54 is formed to support the radially outer side and the axial front cover side portion.

  Further, the retaining plate 252 has a first outer periphery holding portion 277, and the first support portion 277a is provided at both ends of the first outer periphery holding portion 277 in the rotational direction, that is, adjacent portions at both ends of the rotational direction engaging portion 278 in the rotational direction. have. At least a part of the first support portion 277a is disposed radially inward of the first support portion 291 of the support plate 290. At least a part of the third outer periphery holding portion 296 of the auxiliary plate 295 is also disposed radially inward of the first support portion 291. Further, the first support portion 277a has a tapered shape in which the contact position with the first torsion spring 54 moves toward the inner peripheral side as it goes to the rotation direction engaging portion 278 side. Similarly, the third outer peripheral holding portion 296 has a tapered shape in which the contact position with the first torsion spring 54 moves toward the inner peripheral side as it goes to the rotational direction engaging portion 278 side.

  In this lock-up device 5, since the retaining plate 252 has the first support portion 277a and the auxiliary plate 295 has the third outer periphery holding portion 296, the end portion of the first torsion spring 54 is moved in the radial direction. And can be supported axially. Since the first support portion 277 and the third outer peripheral holding portion 296 are disposed radially inward of the first support portion 291, the end portion of the first torsion spring 54 is located on the inner peripheral side of the first support portion 291. Can be supported. Thereby, sliding with the edge part of the 1st torsion spring 54 and the 1st support part 291 of support plate 290 can be controlled, and a hysteresis torque can be reduced.

  Further, when the compression of the first torsion spring 54 is released, the end portion of the first torsion spring 54 pressed by a part of the driven plate 53 is easily returned to the original state.

4). Other Embodiments Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments and can be changed without departing from the scope of the invention.

(1) Support plate In the above-described embodiment, the first support portion of the support plate is a cylindrical portion extending in the axial direction, but is not limited thereto. For example, the first support portion may be an arc-shaped portion formed along the first torsion spring 54.

(2) Auxiliary plate 295
In the third embodiment described above, the auxiliary plate 295 is described as a separate member from the retaining plate 252, but may be integrally formed with the retaining plate 252.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional schematic of the torque converter by which the lockup apparatus as 1st Embodiment of this invention was employ | adopted. FIG. 3 is a schematic plan view of the lockup device 5 as viewed from the transmission side. The AA cross-sectional schematic of FIG. BB cross-sectional schematic of FIG. FIG. 6 is a partial plan view of the periphery of a radial engagement portion 80. The top view of the driven plate 53. FIG. CC sectional drawing of FIG. The plane schematic of the lockup apparatus 105 as 2nd Embodiment of this invention. DD sectional drawing of FIG. The plane schematic diagram of the lockup device 205 as a 3rd embodiment of the present invention. EE sectional drawing of FIG.

Explanation of symbols

1 Torque converter (fluid torque transmission device)
2 Front cover 5 Lock-up device 10 Turbine 51 Piston 52 Retaining plate (holding member)
53 Driven Plate (Driven Member)
54 First torsion spring (first elastic member)
56 Second torsion spring (second elastic member)
78 Rotating direction engaging portion 80 Radial direction engaging portion 90 Support plate (support member)
91 1st support part 92 2nd support part 93 Intermediate | middle engaging part 277 1st support part 295 Auxiliary plate 296 3rd outer periphery holding | maintenance part (2nd support part)

Claims (23)

A lockup device for a fluid torque transmission device, which is disposed between a front cover and a turbine, and mechanically connects the front cover and the turbine;
A piston that is supported by the turbine so as to be relatively rotatable and relatively movable in an axial direction, and is connectable to the front cover;
A driven member fixed to the turbine;
A plurality of first elastic members for elastically connecting the piston and the driven member in a rotational direction;
A holding member fixed to the piston for holding the first elastic member in an elastically deformable direction;
A support member provided to be rotatable relative to the holding member,
The support member has a cylindrical first support portion that is disposed on the radially outer side of the first elastic member and contacts the radially outer portion of the first elastic member.
Lock-up device for fluid torque transmission device. The first elastic member is disposed between the piston and the holding member in the axial direction,
The support member further includes a second support portion disposed between the first elastic member and the piston in an axial direction and extending radially inward from an axial end portion of the first support portion.
The lockup device for a fluid type torque transmission device according to claim 1. The second support part is an annular plate part.
The lockup device for a fluid type torque transmission device according to claim 2. A plurality of second elastic members for elastically connecting the piston and the driven member in the rotational direction;
The first elastic member is arranged to act in parallel on the inner peripheral side of the second elastic member,
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 3. Between the rotation direction of a part of the holding member and a part of the driven member, a plurality of the first elastic members are arranged to act in series,
The support member further includes a plurality of intermediate engagement portions disposed between ends of the plurality of first elastic members.
The lockup device for fluid type torque transmitting devices according to any one of claims 1 to 4. The holding member includes an annular holding member main body, a plurality of rotating direction engaging portions that extend radially inward from an inner peripheral portion of the holding member main body and support an end portion of the first elastic member in a rotating direction; A radial engagement portion disposed adjacent to the rotation direction engagement portion and extending radially inward from an inner peripheral portion of the holding member body;
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 5. At least a portion of the radial engagement portion is disposed radially inward of the first support portion.
The lockup device for a fluid type torque transmitting device according to claim 6. The radial engagement portion has a tapered shape in which a contact position with the first elastic member moves toward an inner peripheral side as going to the rotation direction engagement portion side.
The lockup device for a fluid type torque transmission device according to claim 6 or 7. The support member has a notch formed at an axial end portion of the first support portion;
The rotation direction engaging portion penetrates the notch portion in a radial direction,
A lockup device for a fluid torque transmission device according to any one of claims 6 to 8. The holding member includes an annular holding member main body, a plurality of rotating direction engaging portions that extend radially inward from an inner peripheral portion of the holding member main body and support an end portion of the first elastic member in a rotating direction; A first support portion disposed adjacent to the rotational engagement portion and supporting a radially outer side and axial turbine side portion of the first elastic member; and the first support portion disposed adjacent to the rotational direction engagement portion. A second support portion that supports a radially outer side and an axial front cover side portion of the elastic member;
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 5. An annular auxiliary plate fixed to the piston;
The holding member includes an annular holding member main body, a plurality of rotating direction engaging portions that extend radially inward from an inner peripheral portion of the holding member main body and support an end portion of the first elastic member in a rotating direction; A first support portion disposed adjacent to the rotational engagement portion and supporting a radially outer side and axial turbine side portion of the first elastic member;
The auxiliary plate includes a second support portion that is disposed around the rotation direction engaging portion and supports a radially outer side and axial front cover side portion of the first elastic member.
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 5. At least a part of the first support part is disposed radially inward of the first support part,
At least a part of the second support part is disposed radially inward of the first support part.
The lockup device for a fluid type torque transmission device according to claim 10 or 11. The first support portion has a tapered shape in which a contact position with the first elastic member moves toward an inner peripheral side as going to the rotation direction engaging portion side.
The second support portion has a tapered shape in which a contact position with the first elastic member moves toward an inner peripheral side as going to the rotation direction engaging portion side.
The lockup device for a fluid type torque transmission device according to any one of claims 10 to 12. The holding member has at least one protrusion disposed on the outer peripheral side of the first support portion and extending radially inward.
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 13. The holding member has at least one protrusion disposed on the inner peripheral side of the first support portion and extending radially outward.
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 13. The holding member has a first annular housing portion that houses the first support portion in the axial direction.
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 17. The piston has a second annular housing portion that houses a part of the support member in the axial direction.
The lockup device for a fluid type torque transmitting device according to any one of claims 1 to 16. The holding member has a second holding portion that is disposed on the outer peripheral side of the first support portion and accommodates the second elastic member.
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 17. The driven member includes an annular driven member main body and a plurality of first output engaging portions that extend radially inward from the driven member main body and support an end portion of the first elastic member in a rotational direction. ,
The lockup device for a fluid type torque transmission device according to any one of claims 1 to 18. The driven member has a plurality of second output engagement portions that extend radially outward from an outer peripheral portion of the driven member main body and support an end portion of the second elastic member in a rotation direction.
The lockup device for a fluid torque transmission device according to claim 19. A lockup device for a fluid torque transmission device, which is disposed between a front cover and a turbine, and mechanically connects the front cover and the turbine;
A piston that is supported by the turbine so as to be relatively rotatable and relatively movable in an axial direction, and is connectable to the front cover;
A driven member fixed to the turbine;
A plurality of first elastic members for elastically connecting the piston and the driven member in a rotational direction;
A holding member fixed to the piston for holding the first elastic member so as to be elastically deformable in a rotational direction;
The holding member includes an annular holding member main body, a plurality of rotation direction engaging portions extending inward in the radial direction from an inner peripheral portion of the holding member main body, and supporting an end portion of the first elastic member in a rotation direction; A radial engagement portion disposed adjacent to the rotation direction engagement portion and extending radially inward from an inner peripheral portion of the holding member body;
Lock-up device for fluid torque transmission device. A support member provided to be rotatable relative to the holding member;
The support member has a cylindrical first support portion that is disposed on the radially outer side of the first elastic member and abuts against a radially outer portion of the first elastic member.
The lockup device for a fluid torque transmission device according to claim 21. A front cover;
An impeller that forms a fluid chamber with the front cover;
A turbine disposed opposite the impeller in the fluid chamber;
The lockup device according to any one of claims 1 to 22, wherein the lockup device is disposed between the front cover and the turbine.
A fluid-type torque transmission device.

Images