ROLLER SCREW, MOUNTING METHOD AND TOOL FOR FITTING ROLLERS IN SUCH A ROLLER SCREW

摘要

A roller screw mechanism comprising a screw having an outer threading, a nut arranged around and coaxially to the screw, the nut having an inner threading, and a plurality of mutually identical rollers interposed between the screw and the nut. Each mutually identical roller having an outer threading engaged with the outer and inner threadings of the screw and of the nut. The threading of each roller being prolonged axially at each end by teeth respectively engaged with teeth of two annular gear wheels fixed in an unthreaded part of the bore of the nut. Each of the mutually identical rollers comprises an angular visual positioning feature, making it possible to place the rollers in one of the annular gear wheels with respect to a predetermined reference point of the gear wheel.

主权项

1. A roller screw mechanism comprising:
a screw having an outer threading; a nut arranged around and coaxially to the screw, the nut having an inner threading; and a plurality of mutually identical rollers interposed between the screw and the nut, each mutually identical rollers having an outer threading engaged with the outer and inner threadings of the screw and of the nut, the threading of each roller being prolonged axially at each end by teeth which are themselves prolonged axially by a cylindrical journal extending outwards, two annular gear wheels fixed in an unthreaded part of the bore of the nut and each internally comprising teeth respectively engaged with the teeth of the rollers and two annular spacer rings each fitted radially between the screw and the associated gear wheel and comprising a plurality of cylindrical through voids distributed evenly in the circumferential direction and inside which the journals of the rollers are housed, wherein each of the rollers comprises an angular visual positioning feature making it possible to place the rollers in one of the annular gear wheels with respect to a predetermined reference point of the gear wheel or of the nut.