Patent ID: 8210951

Claim:
A dual mass flywheel for a drive train of a motor vehicle comprising: a primary flywheel mass; a secondary flywheel mass which is rotationally elastically coupled to the primary flywheel mass via at least one spring device; and at least one transmission device arranged between the spring device and at least one of the two flywheel masses, the transmission device effecting a reduction of a deflection movement of the spring device with respect to a rotational movement of the two flywheel masses relative to one another, wherein the transmission device modifies a characteristic of the spring device, wherein the transmission device has a cam profile and a counter-element moveable along the cam profile, wherein the cam profile is formed at an external cam or at an internal cam which is arranged rotationally fixedly with respect to one of the flywheel masses, wherein the transmission device cooperates with the spring device via an intermediate element which is rotatably supported with respect to an axis of rotation (A) of the dual mass flywheel and which is formed as a ring, wherein the transmission device has at least one lever which is pivotably connected to one of the two flywheel masses, wherein the lever has a drive section which via the counter-element and the cam profile cooperates with the other one of the two flywheel masses in order to drive the lever to make a pivot movement in response to a rotational movement of the two flywheel masses relative to one another, and wherein the lever has a deflection section which via the intermediate element cooperates with a respective end of the spring device to effect a deflection movement of the spring device in response to a pivot movement.