Roller screw

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

F16H 25/22 (2006.01)

Patent

CA 2536373

A roller screw has a screw shaft (1) in the outer peripheral surface of which there is formed a helical roller rolling groove (1a), a nut member (2a) in the inner peripheral surface of which there is formed a helical load roller rolling groove (2a) facing the roller rolling groove (1a), a return pipe (4) inside of which there is formed a roller return path (5) connecting one end and the other end of a load roller rolling path (3) between the roller rolling groove (1a) of the screw shaft (1) and the load roller rolling groove (2a) of the nut member (2), and rollers (6) received in the load roller rolling path (3) and the roller return path (5). The roller return path (5) is twisted so that the rollers change the attitude as they move in the axial direction of the return pipe (4), and this facilitates assembling, makes the structure simple, and enables the rollers to circulate smoothly.

L'invention concerne une vis à rouleaux comprenant une tige de vis (1) dont la surface périphérique comporte une rainure de roulement de rouleau hélicoïde (1a), un élément d'écrou (2a) dont la surface périphérique comporte une rainure de roulement de rouleau de charge hélicoïde (2a) faisant face à la rainure de roulement (1a), un conduit de retour (4) à l'intérieur duquel est formé un chemin de retour de rouleau (5) reliant une extrémité à l'autre extrémité d'un chemin de roulement de rouleau de charge (3) entre la rainure de roulement de rouleau (1a) de la tige de vis (1) et la rainure de roulement de rouleau de charge (2a) de l'élément d'écrou (2), ainsi que des rouleaux (6) reçus dans le chemin de roulement de rouleau de charge (3) et le chemin de retour de rouleau (5). Le chemin de retour de rouleau (5) est torsadé de façon que les rouleaux changent d'orientation lorsqu'ils se déplacent dans le sens axial du conduit de retour (4), d'où un assemblage facilité et une structure simplifiée, les rouleaux pouvant en outre circuler sans à-coups.

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