Patent ID: 9035512
Filing Date: 2015-05-19
Classification: F16H,H02K,Y10T

Abstract:
1. A linear actuator comprising: a rotary motor portion including: a rotor; and a hollow rotary shaft formed by combining at least: an output screw shaft disposed coaxially with the hollow rotary shaft and operable to move inside the hollow rotary shaft; a screw nut fixed to the bearing fitting portion and including: a thrust radial bearing including an inner race and an outer race and operable to rotatably support the hollow rotary shaft on the one axial end side, the thrust radial bearing being fitted on an outer periphery of the bearing fitting portion of the hollow rotary shaft, wherein: the rotor fixing portion and the bearing fitting portion are coupled with one or more screw members which are inserted into the hollow rotary shaft from the one axial end and axially extend inside the bearing fitting portion and the rotor fixing portion; the bearing fitting portion is unitarily formed with an abutment portion which abuts onto an end surface of the inner race of the thrust radial bearing that is located on the one axial end side; and the flange portion of the screw nut is fixed on the abutment portion of the bearing fitting portion.