Roller screw, mounting method and tool for fitting rollers in such a roller screw

• Main Author: MAGNIN CHRISTOPHE
• Format: Patent
• Language: English
• Published: 19.08.2015
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HAND TOOLS; HEATING; LIGHTING; MANIPULATORS; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PORTABLE POWER-DRIVEN TOOLS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING; TRANSPORTING; WEAPONS

A roller screw mechanism comprising a screw having an outer threading; a nut 18 arranged around and coaxially to the screw, the nut 18 having an inner threading; and a plurality of mutually identical rollers 22i interposed between the screw and the nut 18. Each mutually identical roller 22i having an outer threading 24 engaged with the outer and inner threadings of the screw and of the nut 18. The threading of each mutually identical roller being prolonged axially at each end by teeth respectively engaged with teeth of two annular crown rings 34 fixed in an unthreaded part of the bore of the nut 18. Each of the mutually identical rollers 22i comprises an angular visual positioning feature 60i. The nut 18 comprises an angular visual positioning feature 18a making it possible to angularly place the rollers 22i in the crown ring 34.