Patent ID: 7048657
Filing Date: 2006-05-23
Classification: F16H

Abstract:
1. A belt-driven conical-pulley transmission comprising: a drive side and an output side conical disk pair, whereby one conical disk pair is arranged on a shaft and includes a fixed conical disk carried by the shaft, a movable conical disk non-rotatably connected with and axially movable relative to the shaft, a support ring axially fixedly attached on the shaft at a distance from a back side of the movable disk, wherein the movable disk includes a collar facing the support ring and having an inner surface facing the shaft, at least one pressure chamber constructed axially between the support ring and the back side of the movable disk and which is supplied with hydraulic pressure medium through a passage constructed in the shaft and having an opening that opens into a peripheral surface of the shaft, wherein the pressure for displacing the movable disk is changeable, wherein when the movable disk is moved along the shaft toward the support ring an outer end region of the inner surface of the movable disk collar passes over the opening of the passage at a maximum spacing of the movable disk from the fixed disk, and wherein a hydraulic medium connection between the passage and the pressure chamber takes place over drainage slots between the inner surface of the movable disk collar and the peripheral surface of the shaft, and wherein the drainage slots are formed over at least a portion of the collar inner surface at the end region of the movable disk collar when the end region is radially shifted relative to the shaft as a result of a tilting torque operating on the movable disk, and a radial slot is formed between the movable disk inner surface and the shaft on a portion of the periphery of the shaft.