Patent ID: 6758775
Filing Date: 2004-07-06
Classification: F16H

Abstract:
An infinitely variable cone pulley transmission for generating of axial contact pressure forces upon a traction means, comprising:an input side shaft and an output side shaft; cone pulleys arranged on the input side and output side shafts, the traction means rotating between the cone pulleys; means arranged on the transmission shafts, for exerting forces in axial direction upon respectively one cone pulley that can be displaced axially along the respective shaft, the exerting means including hydraulic tensioning means provided on input side shaft for adjusting and maintaining the transmission ratio and a spring supported tensioning means that is braced against a support, fixed relative to the output side shaft provided on the output side shaft, wherein the cone pulleys on the output side shaft include an axially fixed cone pulley and an axially movable cone pulley with an extended hub are jointly arranged on the output side shaft, wherein the cone pulleys on the input side and output side shafts are rotationally connected and jointly rotate on the respective shaft and are coupled to said the respective shaft and the exerting means exerts a contact pressure that depends on the rotational moment or the rotational moment and the transmission ratio, wherein the exerting means of the output side shafts includes a cam sleeve that is fixedly connected to the output side shaft, a cam sleeve formed by the free end of an extended hub and roll bodies for transmitting force, wherein said roll bodies are inserted between opposite arranged cam curves and rotate around roll body axes extending in radial direction, relative to the output side shaft, wherein the exerting means further includes rings for guiding and holding the roll bodies at a mutual distance to each other in the axial center region between the cam curves with the aid of a spring that is arranged coaxial on the extended hub, wherein the roll bodies include pinions that are coaxial to a rotational axes of the pinions and project in radial direction relative to the output side shaft from the roll bodies for engaging corresponding recesses, and wherein, in radial direction relative to the output side shaft, wherein the rings include a guide ring and a holding ring, the guide ring being in the form of a hollow-cylindrical sleeve is arranged outside of the roll bodies, wherein the guide ring encloses the roll bodies and the extended hub, and the guide ring can be displaced in axial direction along the extended hub, but is positioned such that the guide ring cannot rotate relative to the extended hub, wherein at least some of the pinions on the roll bodies are outward projecting and are positioned to rotate in circumferential slots of the guide ring that extend along a radial plane of the output side shaft, the slots having an axial width corresponding to the diameter of the pinions and are held in the region of the axial center between the cam sleeves, wherein, in circumferential direction, the length of the circumferential slots corresponds to at least half the maximum mutual circumferential path for the cam sleeves of the exerting means and wherein the guide ring has an end facing the axially movable cone pulley forming an extension onto the spring, such that moving in the same direction, the guide ring respectively traverses essentially half the axial distance traversed by the movable cone pulley.