Linear actuator

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

Patent

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Details

F16H 25/22 (2006.01) F16H 25/24 (2006.01)

Patent

CA 2744545

The invention relates to a linear actuator (1) comprising: - an outer tubular body (2) having a helical rolling track (20); - an internal tubular body (3) with an engine (40) rotatable around a shaft (41) that is coaxial to the tubular bodies (2; 3); - at least one nut (42) having at least one helical rolling path (420) and a reflow area (421) mounted on said shaft (41); - and ball bearings (44) placed between a rolling path (420) of at least one nut (42) and a rolling track (20) of the outer tubular body (2), as well as in the reflow area (421) of such a nut (42). Said actuator (1) is characterized in that it comprises at least one means (5) for bearing against a rolling track (20) of the outer tubular body (2) along at least one line of contact, and at least one means (6) for controlling said bearing means (5).

L'invention concerne un actionneur linéaire (1) comportant : un corps tubulaire externe (2) avec une piste de roulement hélicoïdale (20); un corps tubulaire interne (3) avec un moteur (40) d'entraînement en rotation d'un arbre (41) coaxial aux corps tubulaires (2; 3); - monté sur cet arbre (41), au moins un écrou (42) avec au moins un chemin de roulement hélicoïdal (420) et une zone de recirculation (421); - des billes (44) disposées entre un chemin de roulement (420) d'au moins un écrou (42) et une piste de roulement (20) du corps tubulaire externe (2) ainsi que dans la zone de recirculation (421) d'un tel écrou (42). Cet actionneur (1) est caractérisé en ce qu'il comporte au moins un moyen (5) pour prendre appui sur une piste de roulement (20) du corps tubulaire externe (2) selon au moins une ligne de contact et au moins un moyen (6) de commande de ce moyen d'appui (5).

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