Starting device

Patent metadata

Field	Value
Publication number	US-9989136-B2
Application number	US-201415108683-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Jan 31, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A starting device where the lock-up clutch is a single-plate clutch including a piston having a friction material that is in frictional engagement with the input member; and the piston and the input element of the damper mechanism are coupled to each other on a radially inner side of the plurality of pendulum mass bodies so as to rotate together.

First claim

The invention claimed is:

1. A starting device comprising:
a damper mechanism including an input element to which power is transmitted from an input member, an output element that is coupled to an input shaft of a transmission, and elastic bodies that transmit torque between the input element and the output element;
a lock-up clutch capable of performing lock-up to couple the input member to the input shaft of the transmission via the damper mechanism and capable of releasing the lock-up; and
a centrifugal pendulum vibration absorber including a support member that rotates together with a rotary element of the damper mechanism, and a plurality of pendulum mass bodies that are swingably supported by the support member, wherein:
the lock-up clutch is a single-plate clutch including a piston having a friction material that is in frictional engagement with the input member;
the piston and the input element of the damper mechanism are coupled to each other on a radially inner side of the plurality of pendulum mass bodies so as to rotate together;
the piston includes a plurality of drive-side projections extending toward the input element via bent portions and arranged circumferentially at intervals;
the input element includes a plurality of driven-side projections extending toward the piston via bent portions and arranged circumferentially at intervals; and
each of the drive-side projections of the piston is fitted between adjacent two of the driven-side projections of the input element, and each of the driven-side projections of the input element is fitted between adjacent two of the drive-side projections of the piston.

2. The starting device according claim 1 , wherein:
the input element includes a first input plate member disposed close to the piston, and a second input plate member disposed farther from the piston than the first input plate member and coupled to the first input plate member;
the rotary element that rotates together with the support member of the centrifugal pendulum vibration absorber is disposed between the first and second input plate members; and
the bent portions and the driven-side projections of the input element are provided in the first input plate member.

3. The starting device according to claim 2 , wherein the driven-side projections of the first input plate member and the drive-side projections of the piston are disposed radially inward of the plurality of pendulum mass bodies and radially outward of the elastic bodies of the damper mechanism.

4. The starting device according to claim 2 , wherein the driven-side projections of the first input plate member and the drive-side projections of the piston at least partially overlap the elastic bodies of the damper mechanism in a direction orthogonal to a rotation axis of the damper mechanism.

5. The starting device according to claim 1 , wherein:
the piston includes a coupling member having the bent portions and the drive-side projections and fixed to the piston via rivets; and
the coupling member is fixed to the piston such that the drive-side projections extend on a radially inner side of the rivets toward the input element.

6. The starting device according to claim 1 , wherein:
the piston includes a coupling member having the bent portions and the drive-side projections and fixed to the piston via rivets; and
the coupling member is fixed to the piston such that the drive-side projections extend on a radially outer side of the rivets toward the input element.

7. The starting device according to claim 5 , wherein the piston includes an annular bent portion that is formed to be located radially inward of the rivets.

8. The starting device according to claim 5 , wherein the rivets and the elastic bodies of the damper mechanism are not axially aligned.

9. The starting device according to claim 1 , further comprising:
a pump impeller rotatable together with the input member; and
a turbine runner coupled to the output element of the damper mechanism, wherein:
torque is transmitted from the input element to the output element of the damper mechanism via the elastic bodies; and
the output element of the damper mechanism is used also as the support member of the centrifugal pendulum vibration absorber.

10. The starting device according to claim 3 , wherein the driven-side projections of the first input plate member and the drive-side projections of the piston at least partially overlap the elastic bodies of the damper mechanism in a direction orthogonal to a rotation axis of the damper mechanism.

11. The starting device according to claim 2 , wherein:
the piston includes a coupling member having the bent portions and the drive-side projections and fixed to the piston via rivets; and
the coupling member is fixed to the piston such that the drive-side projections extend on a radially inner side of the rivets toward the input element.

12. The starting device according to claim 2 wherein:
the piston includes a coupling member having the bent portions and the drive-side projections and fixed to the piston via rivets; and
the coupling member is fixed to the piston such that the drive-side projections extend on a radially outer side of the rivets toward the input element.

13. The starting device according to claim 6 , wherein the piston includes an annular bent portion that is formed to be located radially inward of the rivets.

14. The starting device according to claim 6 , wherein the rivets and the elastic bodies of the damper mechanism are not axially aligned.

15. The starting device according to claim 10 , wherein:
the piston includes a coupling member having the bent portions and the drive-side projections and fixed to the piston via rivets; and
the coupling member is fixed to the piston such that the drive-side projections extend on a radially inner side of the rivets toward the input element.

16. The starting device according to claim 10 , wherein:
the piston includes a coupling member having the bent portions and the drive-side projections and fixed to the piston via rivets; and
the coupling member is fixed to the piston such that the drive-side projections extend on a radially outer side of the rivets toward the input element.

17. The starting device according to claim 15 , wherein the piston includes an annular bent portion that is formed to be located radially inward of the rivets.

18. The starting device according to claim 17 , wherein the rivets and the elastic bodies of the damper mechanism are not axially aligned.

19. The starting device according to claim 18 , further comprising:
a pump impeller rotatable together with the input member; and
a turbine runner coupled to the output element of the damper mechanism, wherein:
torque is transmitted from the input element to the output element of the damper mechanism via the elastic bodies; and
the output element of the damper mechanism is used also as the support member of the centrifugal pendulum vibration absorber.

Assignees

• Aisin Aw Co

Inventors

• Takikawa Yoshihiro
• Nagae Akihiro
• Onoda Masanori
• Maruyama Kazuto
• Honda Tatsuro

Classifications

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H2045/0226

  comprising two or more vibration dampers · CPC title

• F16H2045/0205

  two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16F15/145

  Masses mounted with play with respect to driving means thus enabling free movement over a limited range · CPC title

• F16F15/14

  using masses freely rotating with the system, {i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers (compensation of inertia forces F16F15/22; weights for balancing rotating bodies F16F15/32)} · CPC title