Patent ID: 9709140
Date: 2017-07-18
CPC Classifications: F16H,Y10T

Claim:
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 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 which are themselves prolonged axially by a cylindrical journal extending outwards, the roller screw mechanism further comprising two annular crown rings 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 rings each fitted radially between the screw and the associated crown ring 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 and the nut comprises an angular visual positioning feature making it possible to angularly place the rollers in the crown ring.