Roller screw

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

Patent

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Details

F16H 25/22 (2006.01)

Patent

CA 2542377

A roller screw comprises a screw shaft (1) externally formed with a spiral roller rolling groove (1a), a nut member (2) internally formed with a spiral load roller rolling groove (2a) opposed to the roller rolling groove (1a), a return pipe (4) connecting one end of the load roller rolling groove (2a) of the nut member (2) to the other end thereof, and a plurality of rollers (6) received in the load roller rolling passage (3) and return pipe (4). Disposed between a pair of adjacent rollers (6, 6) is a spacer (31) for preventing the pair of rollers (6, 6) from contacting with each other. By such roller screw, it is possible to smoothly circulate rollers without causing skew.

Une vis à rouleaux satellites comprend un arbre de vis (1) présentant extérieurement une rainure (1a) de roulement d'un rouleau hélicoïdal, un écrou (2) présentant intérieurement une rainure (2a) de roulement d'un rouleau de charge hélicoïdal, opposée à la rainure (1a), un conduit de retour (4) reliant une extrémité de la rainure de roulement du rouleau de charge (2a) de l'écrou (2) à l'autre extrémité de celui-ci, et une pluralité de rouleaux (6) logés dans le passage (3) de roulement du rouleau de charge et du conduit de retour (4). Il est prévu, entre une paire de rouleaux adjacents (6, 6), un espaceur (31) destiné à empêcher la paire de rouleaux (6, 6) d'être en contact entre eux. Grâce à une telle vis à rouleaux satellites, les rouleaux circulent sans à-coups, sans effet d'obliquité.

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