Patent ID: 9709127
Date: 2017-07-18
CPC Classifications: F16F,F16H

Claim:
1. A starting device comprising: a front cover coupled to a motor of a vehicle; a pump impeller joined to the front cover; a turbine runner disposed to face the pump impeller and coupled to an input shaft of a transmission; a lock-up clutch having a lock-up piston that defines a lock-up chamber together with the front cover; a damper mechanism including an input element that is coupled to the lock-up piston and that defines a clutch engagement chamber that opposes the lock-up chamber together with the lock-up piston, an output element coupled to the input shaft of the transmission, and a spring disposed between the input element and the output element; and a centrifugal-pendulum vibration absorbing device disposed in the clutch engagement chamber and coupled to the damper mechanism, wherein: the lock-up clutch engages and disengages the front cover and the input element of the damper mechanism with and from each other in accordance with a pressure difference between a clutch disengagement pressure supplied to the lock-up chamber and a clutch engagement pressure regulated independently of the clutch disengagement pressure and supplied to the clutch engagement chamber; a gap that allows a working fluid from the lock-up chamber to flow into the lock-up engagement chamber is formed at a coupling portion between the lock-up piston and the input element; the damper mechanism is disposed on the turbine runner side with respect to the centrifugal-pendulum vibration absorbing device and the gap; the centrifugal-pendulum vibration absorbing device includes a support member that is coupled to the damper mechanism and that extends in parallel with a clutch engagement chamber side-surface of the lock-up piston, multiple mass bodies each including two weights that face each other via the support member and that are coupled to each other, and a guide roller that rolls on inner peripheral surfaces of a first notch portion formed in the support member and a weight- side notch portion formed in the weight; one of the support member and the weight disposed on the lock-up piston side has a protrusion that projects toward the other in an axial direction of the input shaft; and the support member and the weight disposed on the damper mechanism side do not have another protrusion that projects in the axial direction at a position that is symmetrical with respect to the protrusion about a plane that is orthogonal to an axis of the input shaft and that passes through a center, in a thickness direction, of a portion of the support member interposed between the two weights.