To prevent a first spring and a second spring from locally applying loads to one location of an input side member from.
The torsional vibration damping device is provided with an input side member 3 joined to a lock-up piston 2 moving axially and an output side member 4 connected to a transmission. In the input side member 3, a first input side spring receiving section 3a is arranged at peripheral side, and a second input side spring receiving section 3b is arranged at inner peripheral side. In the output side member 4, a first output side member spring receiving section 4a is arranged at peripheral side, and a second output side spring receiving section 4b is arranged at inner peripheral side. A first spring 11 is arranged inside the first input side spring receiving section 3a and inside the first output side spring receiving section 4a. A second spring 12 is arranged inside the second input side receiving section 3b and inside the second output side spring receiving section 4b. When the second spring 12 is sufficiently shorter in length than the first spring 11, an intermediate length location of the spring housing space of the first spring 11 and that of the second spring 12 are set to be located at corresponding locations on the circumference.
| JP2007247722A | 2007-09-27 |
Hiromichi Kobayashi
Tomioka Kiyoshi