automatic setback cycloidal gearbox and power steering system with such gearbox

摘要

The invention relates to a gearbox with a pair of cycloidal gears (1) comprising an input shaft (2) mounted on a gearbox housing (20) such that it rotates about an axis referred to as " mainshaft "(zz '), an eccentric member (22) supported by the input shaft (2) and rotated by the latter, at least one cycloidal disc (23) rotatably mounted on said eccentric member (22) and with a set of teeth at least one annular gear (25) provided with a receiving tooth assembly (25t) in which the cycloidal tooth assembly (23t) of the cycloidal disc (23) engages, and an output shaft (3) ); wherein the reducer comprises a suspension device (50) arranged to resiliently return the cycloidal tooth assembly (23t) of the cycloidal disc (23) and the annular gear receiving tooth assembly (25t) towards each other in such a manner. whereby the gear indentation between the cycloidal disc (23) and said annular gear (25) is autonomously adjusted along at least one radial component with respect to the main axis (zz ').