JP2020056493A - Power transmission device - Google Patents

Abstract

To increase the inertia amount of a member disposed between an input side member and an output side member, and to improve vibration attenuating performance.SOLUTION: A power transmission device includes a first rotary member 1; a second rotary member 2; and a damper mechanism 3. The first rotary member 1 has a chamber C inside. The second rotary member 2 is disposed so as to relatively rotate with the first rotary member 1. The damper mechanism 3 elastically couples the first rotary member 1 and the second rotary member 2 in a rotating direction, and has a first damper portion 21, a second damper portion 22, and an intermediate member 23. The first damper portion 21 is disposed at a chamber inside portion, and transmits power between the first damper portion 21 and the first rotary member 1. The second damper portion 22 is disposed on an inner side in a diametrical direction of the first damper portion 21 at a chamber outside portion, and transmits power between the second damper portion 22 and the second rotary member 2. The intermediate member 23 has an inertia portion 36c disposed on the chamber outside portion, and couples the first damper portion 21 and the second damper portion 22.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a power transmission device.

  As a device for transmitting power from an engine or a motor as a drive source to a transmission, a power transmission device disclosed in Patent Document 1 is provided. The device disclosed in Patent Document 1 has a first flywheel, an intermediate rotating body, and a second flywheel. The intermediate rotator is disposed so as to be rotatable relative to the first flywheel, and the second flywheel is disposed so as to be rotatable relative to the intermediate rotator. The first flywheel and the intermediate rotating body are elastically connected in the rotational direction by a first damper, and the intermediate rotating body and the second flywheel are elastically connected in the rotational direction by a second damper.

  Then, the power input to the first flywheel is transmitted through a path of the first damper, the intermediate rotating body, the second damper, and the second flywheel, and is input to a clutch device mounted on the second flywheel. Further, when power is transmitted, the first damper and the second damper attenuate the vibration due to the rotation fluctuation.

JP 2007-247723 A

  In a power transmission device as disclosed in Patent Document 1, the amount of inertia of the first flywheel, the intermediate rotating body, and the second flywheel affects the vibration damping performance. For example, depending on the specifications of the engine, the vibration damping performance can be improved by increasing the inertia amount of the second flywheel on the output side with respect to the inertia amount of the first flywheel on the input side.

  Here, when the power transmission device as disclosed in Patent Document 1 is mounted on, for example, a hybrid vehicle, a motor having a large amount of inertia is mounted on the output side of the second flywheel. Therefore, even if the amount of inertia on the output side, that is, the amount of inertia of the second flywheel is increased, the influence on the vibration damping performance is small.

  Therefore, it is preferable to increase the amount of inertia of the intermediate rotating body. However, it is difficult to increase the amount of inertia of the intermediate rotator in the device disclosed in Patent Document 1.

  An object of the present invention is to increase the amount of inertia of a member disposed between an input-side member and an output-side member, thereby improving vibration damping performance.

  (1) A power transmission device according to the present invention includes a first rotating member, a second rotating member, and a damper mechanism. The first rotating member has a chamber therein. The second rotating member is arranged to be relatively rotatable with the first rotating member. The damper mechanism elastically connects the first rotating member and the second rotating member in the rotation direction.

  Further, the damper mechanism has a first damper section, a second damper section, and an intermediate member. The first damper unit is disposed inside the chamber, and transmits power to the first rotating member. The second damper portion is disposed outside the chamber and radially inward of the first damper portion, and transmits power to and from the second rotating member. The intermediate member has an inertia portion disposed outside the chamber, and connects the first damper portion and the second damper portion.

  In this device, for example, the power input to the first rotating member is transmitted through a path of the first damper section → intermediate member → second damper section → second rotating member. Then, the vibration is attenuated by the operation of each damper unit.

  Here, since the inertia portion of the intermediate member is disposed outside the chamber, the intermediate member can be extended radially outward, so that the amount of inertia of the intermediate member can be increased as compared with the conventional device. Therefore, for example, even when the present apparatus is mounted on a hybrid vehicle in which a motor is mounted on the output side of the second rotating member, good vibration damping performance can be obtained.

  (2) Preferably, the first rotating member has an outer peripheral cylindrical portion that forms a part of the chamber on the outer peripheral portion. The inertia portion is disposed radially outward of the outer cylindrical portion.

  Here, since the inertia portion is arranged further radially outward of the outer cylindrical portion of the first rotating member, the inertia amount of the intermediate member can be increased, and the axial dimension of the device is increased. Can be avoided.

  (3) Preferably, the intermediate member has a first transmission member, a second transmission member, and a connecting member. The first transmission member transmits power to and from the first damper unit. The second transmission member transmits power to and from the second damper unit. The connecting member connects the first transmitting member and the second transmitting member, and has an inertia portion on an outer peripheral portion.

  Here, the inertia amount of the intermediate member can be easily increased by the inertia portion of the connecting member. Therefore, the vibration damping performance can be easily improved.

  (4) Preferably, the first damper portion has a plurality of first elastic members, and the second damper portion has a plurality of second elastic members.

  Preferably, the first transmission member has a disk-shaped main body and a plurality of engagement portions. The engagement portion projects radially outward from the main body portion, enters the chamber, and transmits power between the plurality of first elastic members.

  Preferably, the connecting member extends radially outward along the axial first side surface of the first rotating member, and has an inner peripheral end connected to the main body of the first transmitting member. It is a plate of a shape.

  Further preferably, the second transmission member has a first holding member and a second holding member. The first holding member has a first holding portion that extends along the side surface of the connecting member on the first side in the axial direction of the second rotating member, is fixed to the inertia member, and holds the second elastic member. The second holding member is arranged on the second side in the axial direction of the second rotating member so as to face the first holding member, is fixed to the first holding member, and holds the second elastic member together with the first holding member. It has a second holding unit.

  In this case, for example, the power transmitted to the first elastic member is transmitted to the first transmission member, and further in the order of the connecting member, the first holding member and the second holding member, the second elastic member, and the second rotating member. Is transmitted.

  Here, since the connecting member extends along the side surface of the first rotating member, the amount of inertia can be increased while suppressing the axial dimension. The first holding member extends along the side surface of the connecting member on the first side in the axial direction of the second rotating member, and the second holding member is provided on the second side in the axial direction of the second rotating member. , The axial dimension of the entire apparatus can be reduced.

  (5) Preferably, the second elastic member is disposed radially inward of the first elastic member at a position shifted from the first elastic member in the axial direction, and partially overlaps the first transmission member in the axial direction. ing.

  Here, the second elastic member is arranged at a position shifted in the axial direction from the first elastic member, but a part thereof is arranged so as to overlap the first transmitting member in the axial direction. Therefore, the axial dimension of the device can be reduced.

  (6) Preferably, the apparatus further comprises a seal portion for sealing an internal space of the chamber.

  In this case, a viscous fluid such as grease can be sealed in the chamber, and a vibration damping effect by the viscous fluid can be obtained.

  (7) Preferably, the chamber has a viscous fluid inside. That is, the first damper portion provided in the chamber is a wet type damper.

  In such a wet type damper, lubrication can be performed with a viscous fluid, and wear of members can be suppressed.

  On the other hand, in the case of a multi-stage characteristic, a wide torsion angle, and the like in a wet damper, it is necessary to arrange springs on the inner and outer circumferences. However, in order to arrange all the springs on the inner and outer circumferences in the chamber to be of a wet type, the capacity of the chamber becomes large and a large amount of viscous fluid is required.

  Therefore, here, the first damper portion is disposed in a chamber having a viscous fluid therein to be a wet type, and the second damper portion is disposed outside the chamber to be a dry type.

  (8) Preferably, power is input to the first rotating member from the engine, and a motor is connected to an output side of the second rotating member. In this case, the amount of inertia of the intermediate member is not less than 0.2 times and not more than 3.0 times the amount of inertia of the motor.

  Here, by increasing the amount of inertia of the intermediate member, good vibration damping performance can be obtained in the hybrid vehicle. In addition, it is possible to avoid an increase in the size of the device.

  According to the present invention as described above, the amount of inertia of the member disposed between the input side member and the output side member can be increased, and the vibration damping performance can be improved.

1 is a cross-sectional configuration diagram of a power transmission device according to an embodiment of the present invention. FIG. 2 is a front view of the apparatus of FIG. 1. FIG. 2 is an exploded perspective view of the device of FIG. 1. FIG. 2 is an enlarged partial view of FIG. 1. Sectional sectional drawing which shows other embodiment of this invention. FIG. 1 is a schematic diagram of a power transmission path of a hybrid vehicle equipped with a power transmission device according to an embodiment of the present invention.

[overall structure]
FIG. 1 shows a cross section of a power transmission device 10 according to one embodiment of the present invention. FIG. 2 is a front view showing a part of FIG. 1 with parts removed. FIG. 3 is an exploded view of the power transmission device 10. In FIG. 3, some components are omitted.

  In FIG. 1, a drive source (for example, an engine) is disposed on the right side of the power transmission device 10, and a mechanism such as a transmission is disposed on the left side. Hereinafter, the right side of FIG. 1 is referred to as “engine side” (second side in the axial direction), and the left side is referred to as “transmission side” (first side in the axial direction). When the present apparatus is mounted on a hybrid vehicle, the motor is arranged on the left side (that is, on the output side). The OO line in FIG. 1 is the rotation center line.

  The power transmission device 10 includes a first rotary member 1 on an input side, a second rotary member 2 on an output side, and a damper mechanism disposed between the first rotary member 1 and the second rotary member 2 in a power transmission path. 3 is provided.

[First rotating member 1]
The first rotating member 1 is supplied with power from a driving source, and has a first plate 11 and a second plate 12.

  The first plate 11 is formed in a disk shape having an opening 11a in the center. A plurality of holes 11b are formed in the inner peripheral portion, and are fixed to members on the engine side by bolts (not shown) mounted in the holes 11b. At the outer peripheral portion of the first plate 11, two housing portions 11c protruding toward the engine are formed. An engagement portion 11d is formed between the two housing portions 11c.

  The second plate 12 has an annular portion 12a and an outer cylindrical portion 12b. The annular portion 12a is disposed on the outer peripheral portion of the first plate 11 so as to face in the axial direction, and has two accommodation portions 12c and two engagement portions 12d. The accommodating portion 12c is disposed to face the accommodating portion 11c of the first plate 11, and is formed to protrude toward the transmission. Further, the engaging portion 12d is arranged to face the engaging portion 11d of the first plate 11. The outer cylindrical portion 12b extends from the outer end of the annular portion 12a toward the engine. The distal end of the outer cylindrical portion 12b is fixed to the outer peripheral end of the first plate 11 by welding. The ring gear 13 is fixed to the outer peripheral surface of the outer cylindrical portion 12b.

  With the above configuration, a chamber C surrounded by the outer peripheral portion (the annular portion 12a and the outer peripheral cylindrical portion 12b) of the first plate 11 and the second plate 12 is formed inside the first rotating member 1. ing. A viscous fluid such as grease is sealed inside the chamber C.

[Second rotating member 2]
The second rotating member 2 is rotatable relative to the first rotating member 1. The second rotating member 2 is arranged at substantially the same position as the first rotating member 1 in the axial direction. That is, the second rotating member 2 is disposed so as to overlap the first rotating member 1 in the radial direction. The second rotating member 2 has a hub 15 and a flange 16.

  The hub 15 is formed in a tubular shape, and has a distal end extending to the opening 11 a at the center of the first plate 11. A spline hole 15a is formed in the inner peripheral surface of the hub 15, and a member (not shown) on the transmission side engages with the spline hole 15a.

  The flange 16 extends radially outward from the outer peripheral surface of the hub 15 and is formed in a disk shape. As shown in FIGS. 2 and 3, the flange 16 is formed with four housing portions 16a. Each accommodation part 16a is an opening penetrating in the axial direction.

[Damper mechanism 3]
The damper mechanism 3 elastically connects the first rotating member 1 and the second rotating member 2 in the rotation direction. The damper mechanism 3 has a first damper part 21, a second damper part 22, and an intermediate member 23.

<First damper unit 21>
The first damper unit 21 is disposed inside the chamber C of the first rotating member 1 and transmits power to and from the first rotating member 1. That is, the first damper section 21 is a wet type damper. As shown in FIG. 2, the first damper portion 21 has two elastic units 24. Each elastic unit 24 has five outer peripheral side springs 26 (an example of a first elastic member), four intermediate sheets 27, and two end sheets 28.

  The five outer peripheral side springs 26 are arranged side by side in the circumferential direction. The four intermediate sheets 27 are arranged between the adjacent outer peripheral side springs 26 in the circumferential direction. The two end sheets 28 are arranged at circumferential ends of the elastic unit 24. The two end sheets 28 are in contact with the engaging portions 11 d and 12 d of the first plate 11 and the second plate 12. Therefore, power is transmitted from the first rotating member 1 to each elastic unit 24 via the engaging portions 11d and 12d.

<Second damper unit 22>
The second damper unit 22 is a dry type damper disposed outside the chamber C. As shown in FIGS. 1 and 2, the second damper portion 22 has four inner peripheral side springs 30 (an example of a second elastic member) and a hysteresis torque generating mechanism 31. The four inner peripheral side springs 30 are arranged side by side in the circumferential direction and operate in parallel. The inner peripheral side spring 30 is accommodated in an accommodating portion 16 a formed on the flange 16, for example, in a compressed state. The hysteresis torque generating mechanism 31 is the same as a well-known structure, and has a friction member, a cone spring as an urging member, and the like. The details of the hysteresis torque generating mechanism 31 are omitted here.

<Intermediate member 23>
The intermediate member 23 is a member that connects the first damper unit 21 and the second damper unit 22. The intermediate member 23 includes a first transmission member 35, a connection member 36, and a second transmission member 37, as shown in FIGS. FIG. 4 is an enlarged view of a part of FIG.

-First transmission member 35-
The first transmission member 35 transmits power to and from the first damper unit 21. As shown in FIG. 3, the first transmission member 35 has an annular main body 35a and two engagement portions 35b. The inner peripheral end 35c of the main body 35a is thinner than other portions, and a plurality of connection holes 35d are formed in the inner peripheral end 35c. Further, the two engagement portions 35b protrude radially outward from the main body 35a and enter the chamber C. Then, the two engagement portions 35b engage with the end sheet 28. Thus, the power input to the elastic unit 24 is transmitted to the first transmission member 35 via the end sheet 28 and the engagement portion 35b.

  As shown in FIG. 1, seal portions 40 are provided on both axial sides of the main body 35 a of the first transmission member 35. More specifically, as shown in an enlarged manner in FIG. 4, a friction member 41 and a cone spring 42 are provided between the first plate 11 and the main body 35a and between the second plate 12 and the main body 35a, respectively. Is provided. The friction members 41 are pressed against the corresponding side surfaces of the plates 11 and 12 by the cone spring 42. This prevents the viscous fluid in the chamber C from flowing out.

-Connecting member 36-
The connecting member 36 is arranged on the transmission side of the first rotating member 1 and connects the first transmitting member 35 and the second transmitting member 37. The connecting member 36 has a disk portion 36a, a fixing portion 36b, and an inertia portion 36c.

  The disk portion 36a extends radially outward along the side surface of the second plate 12 constituting the first rotating member 1. The fixing portion 36b is formed at the inner peripheral end of the disk portion 36a, and is offset from the disk portion 36a toward the engine. The fixing portion 36b is fixed to the thin portion 35c at the inner peripheral end of the first transmission member 35 by a rivet 44. The inertia portion 36c is formed at the outer peripheral end of the disk portion 36a so as to protrude toward the engine. The inertia portion 36c is formed in an annular shape, and has a greater thickness in the axial direction than that of the disk portion 36a. The inertia portion 36c is arranged so as to cover the outer peripheral surface of the outer cylindrical portion 12b of the second plate 12 except for the portion where the ring gear 13 is mounted. A plurality of fixing screw holes 36d are formed in the inertia portion 36c.

-Second transmission member 37-
The second transmission member 37 transmits power to and from the second damper unit 22. The second transmission member 37 has a first holding plate 51 (first holding member) and a second holding plate 52 (second holding member).

  The first holding plate 51 is disposed on the transmission side of the second rotating member 2 and on the transmission side of the connecting member 36. The first holding plate 51 extends along the side surface of the connecting member 36 from the radially intermediate portion to the outer peripheral portion. The outer peripheral end of the first holding plate 51 is fixed to the inertia portion 36c of the connecting member 36 by a bolt (not shown). Four first holding portions 51c are formed on the inner peripheral portion of the first holding plate 51. The first holding portion 51c is arranged so as to face the housing portion 16a of the second rotating member 2. The first holding portion 51c holds the inner peripheral side spring 30 housed in the housing portion 16a of the second rotating member 2.

  The second holding plate 52 is disposed on the engine side of the second rotating member 2 so as to face the first holding plate 51 in the axial direction. The second holding plate 52 has a disk part 52a and four connecting parts 52b. Four second holding portions 52c are formed in the disk portion 52a. The second holding part 52c is arranged so as to face the housing part 16a and the first holding part 51c. The second holding part 52c holds the inner peripheral side spring 30 together with the first holding part 51c, whereby the movement of the inner peripheral side spring 30 in the radial direction and the axial direction is restricted. The connecting portion 52b is formed so as to protrude outward from the disk portion 52a, and is fixed to the first holding plate 51 by a rivet 53.

[Support structure of intermediate member 23]
As shown in FIGS. 1, 3, and 4, a support member 55 is attached to an inner peripheral end of the first rotating member 1. The support member 55 is an annular member, and has a fixed portion 55a and an inner peripheral side support portion 55b.

  The fixing portion 55a is fixed to the inner peripheral end of the first rotating member 1 by a bolt. The inner peripheral side support portion 55b extends toward the transmission from the inner peripheral end of the fixed portion 55a, and is formed in a tubular shape.

  On the other hand, an outer peripheral side support portion 52d is formed at an inner peripheral end of the second holding plate 52. The outer peripheral side support part 52d is formed by extending the inner peripheral end of the second holding plate 52 toward the engine. The outer peripheral side support portion 52d is radially opposed to the inner peripheral side support portion 55b of the support member 55.

  A bush 56 as a bearing is provided between the outer peripheral side support portion 52d and the inner peripheral side support portion 55b. Thereby, the outer peripheral side support portion 52d is rotatably supported by the inner peripheral side support portion 55b via the bush 56. That is, the intermediate member 23 including the second holding plate 52 is positioned in the radial direction with respect to the first rotating member 1 to which the support member 55 is fixed, and is rotatably supported. Therefore, during operation of the device, the posture of the intermediate member 23 can be always stabilized.

  The transmission-side end of the bush 56 is bent radially outward, and the bent portion 56a is sandwiched between the flange 16 of the second rotating member 2 and the second holding plate 52 in the axial direction. ing. For this reason, the axial movement of the bush 56 is restricted.

[Configuration for shortening axial dimension]
This device achieves reduction in axial dimension by the following configuration.

  (1) The connecting member 36 is arranged along the side surface of the second plate 12, and the first holding plate 51 is arranged along the side surface of the connecting member 36.

  (2) The thickness of the inner peripheral end 35c of the first transmission member 35 is reduced, and the fixing portion 36b of the connecting member 36 is fixed to this portion 35c.

  (3) The inner peripheral side spring 30 is disposed radially inward of the first transmission member 35 at a position shifted from the outer peripheral side spring 26 in the axial direction. The inner peripheral side spring 30 is disposed at a position overlapping the first transmission member 35 in the axial direction.

  In the above-described configuration, a plurality of notches 36e (see FIGS. 3 and 4) are formed at the inner peripheral end of the connecting member 36, and the second holding portion 52c of the second holding plate 52 enters the notch 36e. doing. That is, even if the second holding plate 52 is brought closer to the first transmitting member 35 side, the second holding plate 52 is configured not to interfere with the fixing portion 36b of the connecting member 36 fixed to the first transmitting member 35, The overall axial dimension of the intermediate member 23 is suppressed.

  (4) An opening 36f is formed at a radially intermediate portion of the connecting member 36, and the connecting portion 52b and the rivet 53 of the second holding plate 52 enter the opening 36f. That is, even if the second holding plate 52 is brought close to the connecting member 36, the two are not interfered with each other, and the overall axial dimension of the intermediate member 23 is suppressed.

  (5) As shown in FIG. 3, a plurality of recesses 36g are formed in the inertia portion 36c of the connecting member 36. The recess 36g is formed so as to be recessed toward the engine from the surface of the inertia portion 36c (the end face on the transmission side). Also, a portion 51g of the outer peripheral end of the first holding plate 51 is offset toward the engine so as to fit into the concave portion 36g. The offset portion 51g of the first holding plate 51 is fixed to the recess 36g of the inertia portion 36c by a bolt. Therefore, the head of the bolt does not protrude toward the transmission, and the axial dimension of the entire device is suppressed.

[motion]
When power is input to the first rotating member 1, the power is transmitted from the engaging portions 11 d and 12 d of the first plate 11 and the second plate 12 to the outer peripheral side spring 26 via the end sheet 28. Since the engaging portion 35b of the first transmission member 35 is also engaged with the end of the outer peripheral side spring 26, the power transmitted to the outer peripheral side spring 26 is transmitted to the first transmission member 35 and further connected. The light is transmitted to the first holding plate 51 and the second holding plate 52 of the second transmission member 37 via the member 36.

  The inner circumferential side spring 30 is engaged with the first holding portion 51c of the first holding plate 51 and the second holding portion 52c of the second holding plate 52, and the end of the inner circumferential side spring 30 is the second holding portion. The rotating member 2 is in contact with the end surface of the housing portion 16a. Therefore, the power transmitted from the first holding plate 51 and the second holding plate 52 to the inner peripheral side spring 30 is transmitted to the second rotating member 2. The power is output to a transmission-side member that engages with the spline hole 15a of the hub 15 of the second rotating member 2.

  During the power transmission as described above, the outer peripheral spring 26 and the inner peripheral spring 30 expand and contract. At this time, relative rotation occurs between the intermediate sheet 27 and the end sheet 28 and the first plate 11 and the second plate 12 (that is, the inner peripheral surface of the chamber). Further, relative rotation occurs between the first holding plate 51 and the second holding plate 52 and the second rotating member 2. Therefore, frictional resistance, that is, hysteresis torque is generated between these members. In addition, a hysteresis torque is also generated due to the flow of the viscous fluid inside the chamber C.

  By the operation as described above, vibration due to rotation fluctuation can be attenuated. In particular, in the configuration of the present embodiment, a large amount of inertia of the intermediate member 23 including the connecting member 36 can be secured, so that the vibration damping performance is improved as compared with the conventional device. Further, when the present device is applied to a hybrid vehicle in which a motor is mounted on the output side of the second rotating member 2, the vibration damping performance is further improved.

  Further, the intermediate member 23 is positioned by a bush 56 in the radial direction with respect to the first rotating member 1 to which the support member 55 is fixed, and is rotatably supported. Therefore, during operation of the device, the posture of the intermediate member 23 can be always stabilized.

  Further, since the first damper portion 21 is disposed in the chamber C having a viscous fluid therein, each member can be sufficiently lubricated, and wear of the members constituting the first damper portion 21 can be suppressed. .

  On the other hand, since the second damper portion 22 is disposed outside the chamber C, it is possible to realize a wide torsion angle of the torsional characteristics without increasing the size of the chamber C.

[Application to hybrid vehicles]
FIG. 6 is a schematic diagram of a power transmission path when the power transmission device according to one embodiment of the present invention is applied to a hybrid vehicle.

  As shown in the figure, power is input from the engine 100 to the first rotating member 1. The power input to the first rotating member 1 is transmitted to the second rotating member 2 via the outer peripheral spring 26, the intermediate member 23, and the inner peripheral spring 30. A motor 102 is connected to the second rotating member 2 via a shaft 101 which is spline-engaged with the second rotating member 2, and a transmission 104 is further connected to the motor 102 via a shaft 103.

  In such a power transmission path, the amount of inertia of the intermediate member 23 is preferably not less than 0.2 times and not more than 3.0 times the amount of inertia of the motor 102. If the amount of inertia of the intermediate member 23 is at least 0.2 times the amount of inertia of the motor 102, the peak of the vibration moves to a side lower than the normal engine speed range of the engine. For this reason, a peak of vibration does not appear during use in the normal rotation speed range, and vibration is suppressed also in the normal rotation speed range, and the vibration damping effect is improved. However, if the inertia of the intermediate member is less than 0.2 times the inertia of the motor 102, the above effects may not be expected. On the other hand, if the amount of inertia of the intermediate member 23 exceeds 3.0 times the amount of inertia of the motor 102, the shape of the intermediate member 23 becomes too large, and the device becomes too large, which is not preferable.

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

  (A) In the above embodiment, the bush 56 is employed as a bearing for supporting the intermediate member 23 on the first rotating member 1, but a ball bearing 60 may be employed as shown in FIG.

  In this embodiment, similarly to the above-described embodiment, a support member 55 is fixed to the inner peripheral end of the first rotating member 1, and the support member 55 has a fixed portion 55a and an inner peripheral side support portion 55b. doing. An outer peripheral side support portion 52d is formed at an inner peripheral end of the second holding plate 52. Further, a ball bearing 60 is provided between the outer peripheral side support portion 52d of the second holding plate 52 and the inner peripheral side support portion 55b of the support member 55.

  Thus, the intermediate member 23 including the second holding plate 52 is positioned in the radial direction with respect to the first rotating member 1 to which the support member 55 is fixed, and is rotatably supported.

  (B) The number and arrangement of the springs constituting the damper portion are not limited to the above embodiment. Various modifications are possible.

DESCRIPTION OF SYMBOLS 1 1st rotation member 2 2nd rotation member 3 Damper mechanism 21 1st damper part 22 2nd damper part 23 Intermediate member 26 Outer side spring 30 Inner side spring 35 First transmission member 35a Main part 35b Engagement part 36 Connection member 36c Inertia part 37 Second transmission member 40 Seal part 51 First holding plate 51c First holding part 52 Second holding plate 52c Second holding part C Chamber

Claims (8)

A first rotating member having a chamber therein;
A second rotating member disposed so as to be relatively rotatable with the first rotating member;
A damper mechanism for elastically connecting the first rotating member and the second rotating member in a rotating direction;
With
The damper mechanism includes:
A first damper unit disposed inside the chamber and transmitting power between the first rotating member and the first rotating member;
A second damper portion disposed radially inward of the first damper portion outside the chamber and transmitting power to the second rotating member;
An intermediate member having an inertia portion disposed outside the chamber and connecting the first damper portion and the second damper portion;
Having,
Power transmission device.
The first rotating member has an outer peripheral cylindrical portion that forms a part of the chamber at an outer peripheral portion,
The inertia portion is disposed radially outward of the outer cylindrical portion,
The power transmission device according to claim 1.
The intermediate member,
A first transmission member for transmitting power between the first damper unit;
A second transmission member for transmitting power between the second damper unit;
A connection member that connects the first transmission member and the second transmission member and has the inertia portion on an outer peripheral portion;
Having,
The power transmission device according to claim 1.
The first damper unit has a plurality of first elastic members,
The second damper unit has a plurality of second elastic members,
The first transmission member includes:
A disk-shaped body,
A plurality of engaging portions projecting radially outward from the main body portion and entering the chamber, and transmitting power between the plurality of first elastic members;
Has,
The connecting member extends radially outward along a first side surface in the axial direction of the first rotating member, and has an inner peripheral end connected to the main body of the first transmission member. Plate
The second transmission member,
A first holding member having a first holding portion that extends along a side surface of the connection member on a first side in the axial direction of the second rotating member, is fixed to the inertia member, and holds the second elastic member;
A second holding member is disposed on the second side in the axial direction of the second rotating member so as to face the first holding member, is fixed to the first holding member, and holds the second elastic member together with the first holding member. A second holding member having two holding portions,
Having,
The power transmission device according to claim 3.
The second elastic member is disposed radially inward of the first transmission member at a position shifted in the axial direction from the first elastic member, and partially overlaps the first transmission member in the axial direction. The power transmission device according to claim 4.
The power transmission device according to any one of claims 1 to 5, further comprising a seal portion that seals a space inside the chamber.
The power transmission device according to claim 6, wherein the chamber has a viscous fluid therein.
The first rotating member receives power from an engine,
A motor is connected to an output side of the second rotating member,
The amount of inertia of the intermediate member is 0.2 times or more and 3.0 times or less with respect to the amount of inertia of the motor.
The power transmission device according to claim 1.

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