Patent ID: 6644138
Filing Date: 2003-11-11
Classification: F16C,F16H,Y10T

Abstract:
A variable speed gear transmission comprising at least one gearwheel mounted through a rolling bearing on a transmission shaft, in which the gearwheel can be coupled to the transmission shaft through a coupling element, first cylindrical rolling elements being arranged in a cage in radial direction between an inner raceway formed on the transmission shaft and an outer raceway formed on a hub of the gearwheel, said cage comprising in pockets at least at three circumferential points, second cylindrical rolling elements having a slightly larger diameter than the first cylindrical rolling elements, wherein the first and second cylindrical rolling elements are of a same size ratio between the first and second cylindrical rolling elements defined so that, in a loaded state, the larger diameter of the second cylindrical rolling elements is to become equal to a diameter of the first cylindrical rolling elements in an engaged state under radical loading, whereby the limit of elasticity of the second cylindrical rolling elements having the larger diameter in an unloaded state is not exceeded and the larger diameter of the second cylindrical rolling elements is 2 to 5 &mgr;m larger than the diameter of the first cylindrical rolling elements in the unloaded state.