| abstract |
The invention relates to a belt-pulley decoupling system for piston engines with a hub which can be mounted in a manner fixed against relative rotation on the crankshaft of the engine, a belt pulley which can be turned on the hub, relative to the latter, counter to a spring force and has a belt track, and end stops to limit the motion of the belt pulley relative to the hub. The invention is intended to provide a belt-pulley decoupling system for piston engines which allows an effective reduction in the low-frequency vibrations or nonuniformities on the drive belt and permits simple adaptation to different engine load and speed conditions. According to the invention, a rolling-contact bearing (4) is inserted between the hub (1) and the belt pulley (2), its inner race (5) being rigidly connected to the hub (1) and its outer race (6) being rigidly connected to the belt pulley (2), and viscoelastic elements with a damping effect being provided to transmit a torque from the hub (1) to the belt pulley (2), these elements being firmly connected, on the one hand, to the hub (1), via the inner race (8), and, on the other hand, being firmly connected to the belt pulley (2), via the outer race. <IMAGE> |