Linear actuator with anti-rotation mechanism

摘要

An assembly comprises a housing, a motor within the housing, and a thrust tube with an anti-rotation mechanism. The motor comprises a hollow rotor. An externally threaded screw shaft is coupled to the hollow rotor for rotation therewith. An internally threaded nut is coupled to the externally threaded screw shaft, wherein rotation of the screw shaft causes the nut to move axially. The thrust tube is operably connected with the nut, and the anti-rotation mechanism is attached to the thrust tube to substantially prevent rotation relative the housing.

主权项

1. A linear actuator assembly comprising:
a housing; a motor disposed within the housing, the motor comprising a hollow rotor positioned radially inward of the housing in a proximal end thereof; an externally threaded screw shaft coupled to the hollow rotor for rotation therewith; and a thrust tube coupled to an internally threaded nut positioned radially inward of the hollow rotor and in a proximal end of the thrust tube, the nut having an internally threaded portion mating with the externally threaded screw shaft, wherein rotation of the hollow rotor and screw shaft causes the internally threaded nut and thrust tube to move axially along the screw shaft; and an anti-rotation mechanism attached to a circumference of the thrust tube in a distal end of the actuator housing and in a distal direction from the nut, the anti-rotation mechanism configured to substantially prevent rotation of the thrust tube relative to the housing.