Lock-up device for torque converter

Patent metadata

Field	Value
Publication number	US-2016017970-A2
Application number	US-201214111113-A
Country	US
Kind code	A2
Filing date	Apr 17, 2012
Priority date	May 12, 2011
Publication date	Jan 21, 2016
Grant date	—

Abstract

A lock-up device is a device disposed in a space produced between a front cover and a turbine in a torque converter so as to mechanically connect the front cover and the turbine, and includes a clutch part and a release part. The clutch part is disposed in a power transmission path from the front cover to the turbine, and is configured to be in a clutch-on state of transmitting a power from the front cover to the turbine in a set posture. The release part is configured to be actuated by means of a hydraulic pressure, turn the clutch part of the clutch-on state into a clutch-off state, and block transmission of the power from the front cover to the turbine.

First claim

1 . A lock-up device for a torque converter, the lock-up device being disposed in a space between a front cover and a turbine in the torque converter to mechanically connect the front cover and the turbine, the lock-up device comprising:
a clutch part being disposed in a power transmission path from the front cover to the turbine; and a release part being configured to turn the clutch part of the clutch-on state into a clutch-off state in transmitting a power from the front cover to the turbine, when a hydraulic pressure is applied to the release part, the clutch part being in the clutch-on state, when the hydraulic pressure is not applied to the release part.

2 . The lock-up device for a torque converter recited in claim 1 , wherein
the clutch part includes
an input-side member being coupled to the front cover while being non-rotatable relatively thereto,
an output-side member being coupled to the turbine while being non-rotatable relatively thereto,
a friction member being mounted to either the input-side member or the output-side member, and
a pressing member being configured to press the friction member between the input-side member and the output-side member, and
the release part includes a piston configured to release pressing of by the pressing member by the hydraulic pressure.

3 . The lock-up device for a torque converter recited in claim 2 , wherein
the input-side member includes first and second annular plates, the first and second annular plates are coupled to the front cover while being non-rotatable relatively thereto, at least either of the first and second annular plates is coupled to the front cover while being axially movable, the output-side member includes an output plate having an outer peripheral part disposed between the first and second annular plates, the output plate includes the friction members fixed to portions of the outer peripheral part thereof in opposition to the both annular plates, the output plate is axially movable, and the pressing member is configured to press the one of the annular plates towards the other of the annular plates.

4 . The lock-up device for a torque converter recited in claim 3 , wherein
the piston is axially movable and is configured to move the one of the annular plates away from the other of the annular plate in a direction opposite to a direction of a pressing force of the pressing member by hydraulic pressure.

5 . The lock-up device for a torque converter recited in claim 3 , further comprising
a damper mechanism being disposed between the output plate and the turbine.

Assignees

• Aoki Tatsuyuki
• Yamamoto Kozo
• Mototsune Ken
• Matsuoka Yoshihiro
• Exedy Corp

Inventors

• Aoki Tatsuyuki
• Yamamoto Kozo
• Mototsune Ken
• Matsuoka Yoshihiro

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

• F16H2045/021

  three chamber system, i.e. comprising a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16H2045/0294

  Single disk type lock-up clutch, i.e. using a single disc engaged between friction members · CPC title

• F16H2045/007

  comprising a damper between turbine of the fluid gearing and the mechanical gearing unit · CPC title

• F16H2045/0221

  with damping means · CPC title