Roller screw

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

Patent

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Details

F16H 25/22 (2006.01)

Patent

CA 2541770

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), and a plurality of rollers (6) received between the roller rolling groove (1a) and the load roller rolling groove (2a). The plurality of rollers (6) are cross- arranged, and their diameter (D) is oversized, being greater than specified dimension. According to such a screw, it is possible to pre-load to an optimum degree according to the construction of the roller screw, and therefore, the rigidity of the roller screw can be improved.

La présente invention concerne une vis à rouleaux comprenant une tige de vis (1) sur l'extérieur de laquelle est formée une rainure de roulement de rouleaux spiralée (1a), un élément écrou (2) sur l'intérieur duquel est formée une rainure de roulement de rouleaux de charge spiralée (2a) opposée à la rainure de roulement de rouleaux (1a), et une pluralité de rouleaux (6) reçus entre la rainure de roulement de rouleaux (1a) et la rainure de roulement de rouleaux de charge (2a). La pluralité de rouleaux (6) sont disposés transversalement, et leur diamètre (D) est surdimensionné et supérieur à la dimension spécifiée. Grâce la vis à rouleaux de l'invention, il est possible d'obtenir une pré-charge jusqu'à un degré optimal selon la structure de la vis à rouleaux, et ainsi, la rigidité de la vis à rouleaux peut être améliorée.

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