Patent ID: 6220115
Filing Date: 2001-04-24
Classification: F16H,Y10T

Abstract:
Step-down gear system comprising:a rigid support ring (1), which has a substantially cylindrical supporting surface (2),a radially flexible roller bushing (5), which has an outer peripheral surface (7) having a shorter circumferential length than the supporting surface (2),a drive shaft (14), anda drive core which is non-circular in cross section, which can be brought into rotation by said draft shaft (14) and thereby describes an enveloping circle;such that by the rotational movement of the non-circular core (20) at least one peripheral sector of the outer peripheral surface (7) of the roller bushing (5) is progressively held in a substantially slip-free engagement with the supporting surface (2) of the support ring (1), and further whereinthe enveloping circle of the non-circular drive core (20) has a substantially smaller diameter (D.sub.h) than the basically cylindrical roller bushing (5), andthe roller bushing (5) is supported on the drive core (20; 20/1) by means of a plurality of essentially radially extending transmission elements (32; 33) of equal length.