Lock-up device for torque converter

摘要

Occurrence of secondary resonance in a dynamic damper device of a lock-up device is inhibited to improve effectiveness of the dynamic damper device. The lock-up device includes a drive plate, a driven plate coupled to a turbine, an intermediate member, a plurality of outer peripheral side and inner peripheral side torsion springs, and a dynamic damper device. The intermediate member is disposed between the outer peripheral side torsion springs and the inner peripheral side torsion springs. The outer peripheral side torsion springs elastically couple the drive plate and the intermediate member in a rotational direction. The inner peripheral side torsion springs elastically couple the intermediate member and the driven plate in the rotational direction. The dynamic damper device includes an inertia ring coupled to the intermediate member.

主权项

1. A lock-up device for a torque converter mounted between a front cover coupled to an engine-side member and a turbine coupled to a transmission, comprising:
an input rotary member into which a power is inputted; an output rotary member rotatable relative to the input rotary member and coupled to the turbine; a plurality of elastic members elastically coupling the input rotary member to the output rotary member in a rotational direction; an intermediate member configured to cause at least two of the plurality of elastic members to act in series, the intermediate member being rotatable relative to the input rotary member and the output rotary member; and a dynamic damper device directly coupled to the intermediate member and including a first inertia member.