Electromechanical linear actuator for linearly displacing e.g. nozzle flap, of aircraft's turbojet engine, has satellite rollers including helical teeth cooperating with bush's internal thread and external thread of rod's rear end part

摘要

The actuator (10) has electric motors (18), where each motor comprises a stator (56) fixedly mounted in a cylindrical body (12) around a cylindrical bush (20). The bush is being fixed in translation and axially moves a tubular movable rod (14) using a planetary or satellite roller crown wheel (22) mounted around the rod. The wheel is housed inside the bush. The wheel is carried by a rear end part of the rod and axially immobilized on the end part. Satellite rollers comprise helical teeth cooperating with an internal thread of the bush and an external thread of the rear end part of the rod.