Decoupler for damping a torque transmission between a drive shaft of a motor vehicle and a belt pulley

摘要

A decoupler for damping torque transmission irregularities between a vehicle drive shaft and a belt pulley for driving vehicle auxiliary components. The decoupler includes first and second ramp rings for transmitting torque delivered by the drive shaft to the belt pulley. A spring arrangement provides for axial engagement of the ramp rings. The ramp rings have respective sloped push and pull ramps directed toward the adjacent ramp ring so that in a coasting mode of the vehicle the ramp rings rotate relative to each other and in a vehicle drive mode the ramp rings are drawn toward one another. The decoupler includes a pulley damper for damping torque transmission irregularities to reduce noise emission.

主权项

1. A decoupler for damping torque transmission irregularities between a drive shaft of a motor vehicle and a belt pulley that drives auxiliary assemblies of the vehicle by a drive means, said decoupler comprising:
a first ramp ring for introducing torque delivered to the first ramp ring by the drive shaft, a second ramp ring that axially engages with the first ramp ring to deliver torque to an input flange of a belt pulley, and at least one spring arrangement to press the first ramp ring and the second ramp ring together axially, wherein the spring arrangement includes at least one first spring element and at least one second spring element, wherein the first ramp ring and the second ramp ring are positioned between the first spring element and the second spring element in the axial direction of the decoupler, wherein the first ramp ring carries a first push ramp that is directed toward the second ramp ring and the second ramp ring carries a second push ramp that is directed toward the first ramp ring, and the first push ramp and the second push ramp are each sloped in a circumferential direction relative to the axial direction of the decoupler by a mean push angle α so that in a coasting mode of the vehicle the first ramp ring is rotated relative to the second ramp ring against the spring force of the spring arrangement, and wherein the first ramp ring includes a first pull ramp that is directed away from the second ramp ring and the second ramp ring includes a second pull ramp that is directed away from the first ramp ring, and the first pull ramp and the second pull ramp are each sloped in a circumferential direction of the decoupler relative to the axial direction by a mean pull angle β so that in a drive mode of the vehicle the first ramp ring and the second ramp ring are drawn toward each another.