JP2015215021A - Power transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to adopt various types of configurations as the configuration of a damper mechanism in a torque converter in which a turbine is disposed on an input side of the damper mechanism.SOLUTION: The system comprises: a front cover 2; a torque converter body 6; a damper mechanism 27; and a connecting member 8. The torque converter body 6 includes an impeller 3 receiving power input from the front cover 2; and a turbine 4 disposed to be opposed to the impeller 3. The damper mechanism 27 includes an input member 34; an output member 35 connected to a transmission-side member; and a damper body elastically connecting the input member 34 to the output member 35 in a rotation direction, and is disposed between the front cover 2 and the torque converter body 6 in an axial direction. The connecting member 8 is fixed to the turbine 4 and engaged with the input member 34 of the damper mechanism 27 so as not to be relatively rotatable.

Description

  The present invention relates to a power transmission device, and more particularly to a power transmission device for transmitting power from an engine to a transmission.

  Conventionally, a torque converter is used to transmit power from an engine to a transmission. The torque converter includes a front cover connected to a member on the engine side, and a torque converter main body connected to the front cover. The torque input from the front cover is transmitted to the transmission side via the working fluid. The torque converter main body includes an impeller coupled to the front cover, a turbine coupled to a transmission-side member, and a stator that rectifies the working fluid that returns from the turbine to the impeller.

  Patent Document 1 discloses a torque converter in which a damper mechanism having a torsion spring is provided between a turbine and a transmission-side member. In this torque converter, torque from the turbine is transmitted to a member on the transmission side via a damper mechanism.

JP 2008-82552 A

  In the torque converter disclosed in Patent Document 1, a turbine having a relatively large amount of inertia is arranged on the input side (engine side) from the torsion spring of the damper mechanism. In such a configuration, the resonance rotational speed moves to a rotational speed range lower than the normal rotational speed, and vibration can be further reduced.

  Here, in the configuration disclosed in Patent Document 1, a plate that supports the torsion spring and a member that configures the turbine are coupled by a rivet. Therefore, for example, when the torsion springs are arranged on the outer peripheral side and the inner peripheral side to achieve a wider angle of the torsional characteristics of the damper mechanism, there is a problem that the structure of the damper mechanism becomes complicated. That is, when designing the damper mechanism, the degree of design freedom is restricted.

  An object of the present invention is to make it possible to employ various configurations as a damper mechanism in a power transmission device in which a turbine is arranged on the input side of the damper mechanism.

  A power transmission device according to one aspect of the present invention is a device for transmitting power from an engine to a transmission, and includes a front cover, a torque converter body, a damper mechanism, and a connecting member. The front cover is connected to a member on the engine side. The torque converter main body includes an impeller to which power is input from the front cover, and a turbine disposed to face the impeller, and transmits power through the working fluid. The damper mechanism includes an input member, an output member connected to a transmission-side member, and a damper main body that elastically connects the input member and the output member in the rotational direction, and includes a front cover, a torque converter main body, It is arranged between the axial directions. The connecting member is fixed to the turbine and engages with the input member of the damper mechanism so as not to be relatively rotatable.

  In this apparatus, power from the front cover is transmitted from the impeller to the turbine, and further input from the turbine to the damper mechanism via the connecting member. The power transmitted to the damper mechanism is transmitted to a member on the transmission side via the output member.

  Here, the power from the turbine is input to the damper mechanism via a connecting member as a separate member from the damper mechanism. For this reason, a damper mechanism can be designed without being influenced by the connection structure between a turbine and a damper mechanism, and the freedom degree of design of a damper mechanism increases.

  In the power transmission device according to another aspect of the present invention, the connecting member is formed in an annular shape, and the inner peripheral end face of the connecting member is positioned in the radial direction by contacting a part of the damper mechanism.

  The power transmission device according to still another aspect of the present invention further includes a clutch portion. The clutch unit is disposed between the front cover and the damper mechanism, and transmits power from the front cover to the input member of the damper mechanism or cancels power transmission.

  In the power transmission device according to still another aspect of the present invention, the damper main body includes a plurality of outer peripheral side elastic members, a plurality of inner peripheral side elastic members, and an intermediate member. Both ends in the circumferential direction of the outer peripheral elastic member can be engaged with the input member. The inner circumferential side elastic member can be engaged with the output member at both ends in the circumferential direction, and is arranged on the inner circumferential side of the outer circumferential side elastic member. The intermediate member is rotatable relative to the input member and the output member within a predetermined angle range, and causes the outer peripheral side elastic member and the inner peripheral side elastic member to act in series.

  In the power transmission device according to still another aspect of the present invention, the input member has a shape that covers both sides in the axial direction and the outer peripheral portion of the outer peripheral side elastic member, and restricts movement of the outer peripheral side elastic member in the axial direction and the radial direction. doing.

  In the power transmission device according to still another aspect of the present invention, the input member includes a first input plate and a second input plate. The first input plate covers a side of the outer peripheral side elastic member on the torque converter main body side and an outer peripheral portion of the outer peripheral side elastic member on the torque converter main body side. The second input plate covers the side of the outer peripheral side elastic member on the front cover side and the outer peripheral part of the outer peripheral side elastic member on the front cover side, and is fixed to the first plate.

  The power transmission device according to still another aspect of the present invention further includes a stopper mechanism for restricting relative rotation between the input member and the output member within a predetermined angle range.

  In the power transmission device according to still another aspect of the present invention, the input member is formed in an annular shape, and the output member is formed in an annular shape and disposed on the inner peripheral side of the input member. And the inner peripheral part of the input member and the outer peripheral part of the output member at least partially overlap in the radial direction. The stopper mechanism has a claw portion and a long hole. The claw portion is formed on one of the input member and the output member, and extends in the axial direction. The long hole is formed to extend in the circumferential direction on the other of the input member and the output member, and the claw portion is inserted therein.

  In the power transmission device according to still another aspect of the present invention, the output member includes a pair of output plates and a hub. A pair of output plates support the damper body. The hub has a pair of output plates fixed to each other, and has a hole that can engage with an input member on the transmission side in the center in the radial direction. Further, the hub has an inlay portion that contacts the inner peripheral end surface of the connecting member and supports the connecting member.

  According to the present invention as described above, in the power transmission device in which the turbine is arranged on the input side of the damper mechanism, various configurations are adopted as the damper mechanism without being influenced by the connection structure between the turbine and the damper mechanism. can do.

1 is a partial sectional view of a torque converter according to an embodiment of the present invention. The figure which extracts and shows a part of FIG. The front fragmentary view of a power transmission plate. The partial front view of a 1st input plate. VA-VA sectional view of FIG. VB-VB sectional view taken on the line of FIG. The front fragmentary view of an output plate. VI-VI sectional view taken on the line of FIG. FIG. 3 is an enlarged partial view of FIG. 2. The partial front view of an intermediate member. The front fragmentary view of a connection member.

[overall structure]
FIG. 1 is a partial sectional view of a torque converter 1 as a power transmission device according to an embodiment of the present invention. 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. Note that OO shown in FIG. 1 is the rotational axis of the torque converter 1.

  The torque converter 1 is a device for transmitting torque from a crankshaft (not shown) on the engine side to an input shaft of a transmission. The torque converter 1 includes a front cover 2 connected to a member on the engine side, a torque converter body 6 including three kinds of impellers (an impeller 3, a turbine 4, and a stator 5), a lockup device 7, and a connecting member. 8.

  The front cover 2 is a disk-shaped member, and an outer peripheral cylindrical portion 10 that protrudes toward the axial transmission side is formed on the outer peripheral portion thereof.

[Torque converter body 6]
The impeller 3 includes an impeller shell 12 fixed to the outer peripheral cylindrical portion 10 of the front cover 2 by welding, a plurality of blades 13 fixed inside the impeller shell 12, and a cylindrical shape provided on the inner peripheral side of the impeller shell 12. And an impeller hub 14.

  The turbine 4 is disposed to face the impeller 3 in the fluid chamber. The turbine 4 includes a turbine shell 16 and a plurality of blades 17 fixed to the turbine shell 16.

  The stator 5 is a mechanism for rectifying the hydraulic oil that is disposed between the inner peripheral portion of the impeller 3 and the inner peripheral portion of the turbine 4 and returns from the turbine 4 to the impeller 3. The stator 5 has a disk-shaped stator carrier 20 and a plurality of blades 21 provided on the outer peripheral surface thereof. The stator carrier 20 is supported by a fixed shaft (not shown) via a one-way clutch 22. Thrust bearings 23 and 24 are provided between the turbine shell 16 and the one-way clutch 22 and between the stator carrier 20 and the impeller shell 12, respectively.

[Lock-up device 7]
The lock-up device 7 is disposed between the front cover 2 and the torque converter body 6 and directly transmits power from the front cover 2 to the transmission. The lockup device 7 has a piston 26 and a damper mechanism 27.

<Piston 26>
FIG. 2 shows the lock-up device 7 extracted. As shown in FIGS. 1 and 2, the piston 26 is a disk-shaped plate member, and is disposed to face the front cover 2 in the axial direction. An annular friction member 28 is fixed to the outer surface of the piston 26 on the side surface on the front cover 2 side. An inner peripheral cylindrical portion 26 a extending toward the axial engine side is provided on the inner peripheral edge of the piston 26.

  A power transmission plate 30 is fixed to the side surface of the piston 26 on the turbine side. As shown in FIG. 3, the power transmission plate 30 is formed in an annular shape, and includes a plurality of engaging portions 31 and a plurality of rivet holes 30 a provided at predetermined intervals in the circumferential direction. Yes. The engaging portion 31 is formed by cutting and raising a part of the power transmission plate 30 to the turbine side, and between the pair of protrusions 31a having a predetermined width in the radial direction and the pair of protrusions 31a. And an opening 31b formed. The power transmission plate 30 is fixed to the piston 26 by a rivet 32 (see FIG. 2) inserted into the rivet hole 30a.

<Damper mechanism 27>
The damper mechanism 27 is disposed between the front cover 2 and the torque converter body 6 in the axial direction. As shown in FIG. 2, the input member 34 and the output member 35 are each provided with a plurality of outer peripheral sides and inner peripheral sides. Torsion springs 36 and 37 and an intermediate member 38 are provided. A plurality of outer and inner torsion springs 36 and 37 and an intermediate member 38 constitute a damper main body. Further, the damper mechanism 27 has a final stopper mechanism 39 and an initial stopper mechanism 40.

--Input member 34--
The input member 34 includes a first input plate 41 and a second input plate 42. Since both the input plates 41 and 42 are the same shape, the 1st input plate 41 by the side of the turbine 4 is demonstrated here with FIG.4 and FIG.5A and FIG.5B. 4 is a view of the first input plate 41 viewed from the front cover 2 side, FIG. 5A shows a cross section taken along line VA-VA in FIG. 4, and FIG. 5B shows a cross section taken along line VB-VB in FIG. .

  The first input plate 41 is formed in an annular shape, and as shown in FIGS. 4 and 5A, a plurality of spring accommodating portions 41a, a plurality of engaging portions 41b, an annular fixing portion 41c, and a plurality of engaging portions. It has a combination claw 41d and a plurality of stopper claws 41e.

  The plurality of spring accommodating portions 41a swell at a predetermined interval in the circumferential direction and outward in the axial direction (that is, on the turbine 4 side in the first input plate 41 and on the front cover 2 side in the second input plate 42). Is formed. The outer periphery side torsion spring 36 is accommodated in the spring accommodating portion 41a. The spring accommodating portion 41 a covers the side of the outer peripheral side torsion spring 36 on the turbine 4 side and the outer peripheral portion of the outer peripheral side torsion spring 36 on the turbine 4 side.

  The plurality of engaging portions 41b are formed between the circumferential directions of the plurality of spring accommodating portions 41a. The engaging portion 41b is formed by pressing a part of the spring accommodating portion 41a on the inner side in the axial direction (front cover 2 side). The plurality of engaging portions 41b can be engaged with both ends of the outer peripheral side torsion spring 36 accommodated in the spring accommodating portions 41a and 42a.

  The fixing portion 41c extends further from the outer peripheral end of the spring accommodating portion 41a to the outer peripheral side, and is formed flat. The fixing portions 41c and 42c of both plates 41 and 42 are in contact with each other. In the fixing portion 41c, a rivet hole 41f is formed on the outer peripheral side of the engaging portion 41b. The first and second input plates 41 and 42 are fixed to each other by a rivet 43 (see FIG. 2) inserted into the rivet hole 41f.

  The inner peripheral portion of the first input plate 41 is opposed to the inner peripheral portion of the second input plate 42 with a predetermined interval in the axial direction.

  The plurality of engaging claws 41d and stopper claws 41e are formed on the inner peripheral edge of the first input plate 41 and are alternately arranged in the circumferential direction. The engaging claws 41d are formed by bending a part of the inner peripheral end of the first input plate 41 to the turbine 4 side. The stopper 41e is formed by bending a part of the inner peripheral end of the first input plate 41 to the front cover 2 side.

  Here, as shown in FIGS. 2 and 3, the engaging claws 42d of the second input plate 42 are inserted between the pair of protrusions 31a of the power transmission plate 30 and are in contact with the protrusions 31a. Therefore, the power from the piston 26 and the power transmission plate 30 is transmitted to the input member 34 by the engagement of the protrusion 31 a and the engaging claw 42 d of the second input plate 42.

--Output member 35--
As shown in FIG. 2, the output member 35 has a pair of output plates 45 and 46 and a hub 47. The pair of output plates 45 and 46 are different in specific shape, but basically have the same configuration. Therefore, here, the configuration of the output plate 45 on the turbine 4 side will be described, and the description of the output plate 46 on the front cover 2 side will be omitted.

  As shown in FIGS. 2, 6, and 7, the output plate 45 is formed in an annular shape. 6 is a view of the output plate 45 viewed from the turbine 4 side, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. The output plate 45 has a plurality of window holes 45a for supporting the inner peripheral side torsion spring 37 in the radial intermediate portion. A plurality of stopper grooves 45 b formed to extend in the circumferential direction are formed on the outer peripheral portion of the output plate 45. The stopper claws 41e of the first input plate 41 are inserted into the plurality of stopper grooves 45b. A plurality of rivet holes 45c are formed in the inner peripheral portion of the output plate 45 at predetermined intervals in the circumferential direction.

  With the configuration as described above, the first and second input plates 41 and 42 and the output plate until the stopper claws 41e and 42e of the first and second input plates 41 and 42 come into contact with the end surfaces of the stopper grooves 45b and 46b. Relative rotation with 45 and 46 is allowed. That is, the final stopper mechanism 39 is constituted by the stopper claws 41e, 42e and the stopper grooves 45b, 46b.

  The pair of output plates 45 and 46 as described above are arranged to face each other at a predetermined interval in the axial direction. Further, the outer peripheral ends of the pair of output plates 45 and 46 are inserted between the inner peripheral portions of the first and second input plates 41 and 42. That is, the inner peripheral portions of the first and second input plates 41 and 42 and the outer peripheral portions of the pair of output plates 45 and 46 are arranged so as to overlap in the radial direction.

  The hub 47 is a member having a spline hole 47a in the inner peripheral portion as shown in an enlarged view in FIG. An input shaft of the transmission can be engaged with the spline hole 47a. A piston support portion 47b is formed on the front cover 2 side of the hub 47, and a turbine support portion (inlay portion) 47c is formed on the turbine 4 side. The outer peripheral side is between the axial directions of these support portions 47b and 47c. A flange portion 47d extending in the direction is formed.

  The inner peripheral cylindrical portion 26a of the piston 26 is supported on the outer peripheral surface of the piston support portion 47b so as to be slidable in the axial direction and relatively rotatable. And the sealing member 49 is provided in the outer peripheral surface of the piston support part 47b. The turbine 4 (more specifically, the turbine shell 16) and the connecting member 8 are supported on the outer peripheral surface of the turbine support portion 47c, whereby the turbine 4 and the connecting member 8 are positioned in the radial direction. A pair of output plates 45 and 46 are fixed to the outer peripheral portion of the flange portion 47 d by rivets 50. A plurality of stopper claws 47e are further provided on the outer peripheral surface of the flange portion 47d so as to protrude to the outer peripheral side.

--Intermediate member 38--
The intermediate member 38 is rotatable relative to the input member 34 (first and second input plates 41 and 42) and the output member 35 (mainly a pair of output plates 45 and 46) within a predetermined angle range. . The intermediate member 38 is for causing the outer peripheral side torsion spring 36 and the inner peripheral side torsion spring 37 to act in series. As shown in FIGS. 1, 2 and 9, the intermediate member 38 is a disk-like plate member, and a plurality of first cutout portions 38a for accommodating the outer peripheral side torsion spring 36 at the outer peripheral end portion. have. The plurality of first cutout portions 38a are open to the outer peripheral side. A plurality of second notches 38 b are formed at the inner peripheral end of the intermediate member 38. The second notch 38b is open on the inner peripheral side. A stopper claw 47e of the hub 47 is inserted into the second notch 38b.

  Here, the circumferential width of the second notch 38b is formed wider than the circumferential width of the stopper claw 47e. With such a configuration, relative rotation between the intermediate member 38 and the hub 47 (the output member 35) is allowed until the stopper claw 47e of the hub 47 contacts the end surface of the second notch 38b of the intermediate member 38. . That is, the initial stopper mechanism 40 is constituted by the stopper claw 47e and the second notch 38b.

  In addition, a plurality of spring accommodating portions 38 c for accommodating the inner peripheral side torsion springs 37 are formed in the radial intermediate portion of the intermediate member 38. The spring accommodating part 38c is arrange | positioned so that it may be located in the inner peripheral side between the two adjacent 1st notch parts 38a in the rotation direction.

--- Outer and inner torsion springs 36, 37-
The outer peripheral side torsion spring 36 is accommodated in the first cutout portion 38 a of the intermediate member 38, and the outer peripheral portion and both sides in the axial direction are supported by the first and second input plates 41 and 42. Therefore, the movement of the outer peripheral side torsion spring 36 in the radial direction and the axial direction is restricted by the first and second input plates 41 and 42. The engaging portions 41b and 42b of the first and second input plates 41 and 42 are engaged with both end faces of the outer peripheral side torsion spring 36 accommodated in the first notch 38a.

  The inner peripheral torsion spring 37 is accommodated in the spring accommodating portion 38c of the intermediate member 38, and is supported in the radial direction and the axial direction by the pair of output plates 45 and 46. Therefore, the inner peripheral torsion spring 37 is restricted from moving in the radial direction and the axial direction by the pair of output plates 45 and 46. The end surfaces of the window holes 45a and 46a of the pair of output plates 45 and 46 can be engaged with both end surfaces of the inner peripheral side torsion spring 37 accommodated in the spring accommodating portion 38c.

[Connection member 8]
The connecting member 8 is fixed to the turbine 4 and is engaged with the input member 34 of the damper mechanism 27 so as not to be relatively rotatable. More specifically, as shown in FIGS. 1, 2, and 10, the connecting member 8 is a disk-shaped plate member, and an inner peripheral portion thereof is connected to an inner peripheral end portion of the turbine shell 16 by a rivet 52. ing. A plurality of engaging notches 8 a are formed at the outer peripheral end of the connecting member 8. The notch 8a is open to the outer peripheral side, and the engaging claw 41d of the first input plate 41 is engaged with the notch 8a.

[Operation]
Torque from the crankshaft on the engine side is input to the front cover 2. As a result, the impeller 3 rotates and hydraulic oil flows from the impeller 3 to the turbine 4. The turbine 4 is rotated by the flow of the hydraulic oil, and the connecting member 8 fixed to the turbine 4 is similarly rotated.

  In the low speed range, the lockup device 7 is off (power transmission is released), and in this case, the torque output from the turbine 4 is output to the transmission side via the connecting member 8 and the damper mechanism 27.

  Specifically, due to the engagement between the notch 8 a of the connecting member 8 and the engaging claw 41 d of the first input plate 41, the power from the turbine 4 is transmitted through the connecting member 8 to the first and second input plates 41. , 42. The power transmitted to both the input plates 41 and 42 is transmitted through the path of the input plates 41 and 42 → the outer peripheral side torsion spring 36 → the intermediate member 38 → the inner peripheral side torsion spring 37 → the output plates 45 and 46 → the hub 47. Is done.

  At the time of power transmission, in the damper mechanism 27, the outer peripheral side torsion spring 36 and the inner peripheral side torsion spring 37 act in series by the intermediate member 38.

  Here, when a predetermined relative rotation (angle θ in the example shown in FIG. 9) occurs between the intermediate member 38 and the hub 47 of the output member 35 due to the compression of the inner peripheral side torsion spring 37, the second of the intermediate member 38. The stopper claw 47e of the hub 47 contacts the end face of the notch 38b. That is, the initial stopper mechanism 40 operates. For this reason, after this angle, the inner peripheral torsion spring 37 is not compressed and functions as a rigid body.

  The power transmitted to the outer circumferential side torsion spring 36 is transmitted through the path of the outer circumferential side torsion spring 36 → the intermediate member 38 → the initial stopper mechanism 40 → the hub 47.

  When the transmitted power is further increased, the compression of the outer peripheral torsion spring 36 is increased, and the relative rotational angle between the first and second input plates 41 and 42 and the output plates 45 and 46 is increased, the first and second The first claws 41d and 42d of the input plates 41 and 42 come into contact with the end surfaces of the stopper grooves 45b and 46b of the output plates 45 and 46, respectively. That is, the final stopper mechanism 39 operates.

  When the speed increases, the piston 26 moves to the front cover 2 side, and the friction member 28 is pressed against the side surface of the front cover 2. In this state, the lockup device 7 is turned on (power transmission state), and the power from the front cover 2 is transmitted to the piston 26. The power transmitted to the piston 26 is transmitted to the damper mechanism 27 via the power transmission plate 30. Specifically, the power is transmitted from the power transmission plate 30 to the second input plate 42 and the first input plate 41 by the engagement of the protrusion 31 a of the power transmission plate 30 and the engaging claw 42 d of the second input plate 42. The After the power is transmitted to the first and second input plates 41 and 42, the power is transmitted to the transmission side by the same operation as described above.

[Feature]
In the present embodiment, power is transmitted from the turbine 4 to the damper mechanism 27 via a connecting member 8 different from the turbine 4 or the damper mechanism 27. For this reason, the damper mechanism 27 can be designed without being influenced by the connection structure between the turbine 4 and the damper mechanism 27.

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

  For example, in the above-described embodiment, the present invention is applied to a torque converter that includes a lockup device. However, the present invention can be applied to a torque converter that does not include a lockup device.

  Moreover, in the said embodiment, although the damper mechanism had the outer peripheral side and the inner peripheral side torsion spring, this invention is applicable similarly to the damper mechanism which has only an outer peripheral side torsion spring.

  Furthermore, the groove | channel and protrusion of the member which comprise an engaging part may be comprised by the opposite member, respectively.

DESCRIPTION OF SYMBOLS 1 Torque converter 2 Front cover 3 Impeller 4 Turbine 6 Torque converter main body 7 Lock-up device 8 Connecting member 27 Damper mechanism 34 Input member 35 Output member 36 Outer side torsion spring 37 Inner side torsion spring 38 Intermediate member 39 Final stopper mechanism 40 Initial stage Stopper mechanism 41 First input plate 42 Second input plates 41d, 42d Engaging claws 41e, 42e Stopper claws 45b, 46b Stopper groove 47 Hub 47c Turbine support part (inlay part)

Claims (9)

A power transmission device for transmitting power from an engine to a transmission,
A front cover coupled to a member on the engine side;
A torque converter main body having an impeller to which power is input from the front cover, and a turbine disposed to face the impeller, and transmitting power through a working fluid;
An input member; an output member connected to a transmission side member; and a damper main body that elastically connects the input member and the output member in a rotational direction; and the front cover, the torque converter main body, A damper mechanism disposed between the axial directions of
A coupling member fixed to the turbine and engaged with the input member of the damper mechanism in a relatively non-rotatable manner;
Power transmission device with   The power transmission device according to claim 1, wherein the connecting member is formed in an annular shape, and an inner peripheral end surface of the connecting member is positioned in a radial direction by contacting a part of the damper mechanism.   The clutch part which is arrange | positioned between the said front cover and the said damper mechanism, and transmits the motive power from the said front cover to the input member of the said damper mechanism, or cancels | releases motive power transmission was further provided. Power transmission device. The damper body is
A plurality of outer peripheral elastic members whose both ends in the circumferential direction can be engaged with the input member;
A plurality of inner peripheral side elastic members disposed on the inner peripheral side of the outer peripheral side elastic member, wherein both ends in the circumferential direction can be engaged with the output member;
An intermediate member that is rotatable relative to the input member and the output member within a predetermined angular range, and that causes the outer peripheral side elastic member and the inner peripheral side elastic member to act in series;
Having
The power transmission device according to any one of claims 1 to 3.   5. The power according to claim 4, wherein the input member has a shape that covers both axial sides and an outer peripheral portion of the outer peripheral side elastic member, and restricts movement of the outer peripheral side elastic member in the axial direction and the radial direction. Transmission device. The input member is
A first input plate that covers a side of the outer peripheral side elastic member on the torque converter main body side and an outer peripheral portion of the outer peripheral side elastic member on the torque converter main body side;
A second input plate that covers a side of the outer peripheral side elastic member on the front cover side and an outer peripheral part of the outer peripheral side elastic member on the front cover side and is fixed to the first plate;
Having
The power transmission device according to claim 5.   The power transmission device according to any one of claims 1 to 6, further comprising a stopper mechanism for restricting relative rotation between the input member and the output member within a predetermined angle range. The input member is formed in an annular shape,
The output member is formed in an annular shape and disposed on the inner peripheral side of the input member,
The inner periphery of the input member and the outer periphery of the output member are at least partially overlapped in the radial direction,
The stopper mechanism is
A claw portion formed on one of the input member and the output member and extending in the axial direction;
An elongated hole formed in the other of the input member and the output member so as to extend in the circumferential direction and into which the claw portion is inserted;
Having
The power transmission device according to claim 7. The output member is
A pair of output plates for supporting the damper body;
A hub having the pair of output plates fixed thereto and having a hole in which a transmission side input member can be engaged in a central portion in a radial direction;
Have
The hub has an inlay portion that contacts the inner peripheral end surface of the connecting member and supports the connecting member.
The power transmission device according to claim 2.

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