| 摘要 |
An object of the present invention is to provide an electric linear actuator having tough sealability between the joining surfaces of the housings. According to the present invention, there is provided an electric linear actuator comprising a housing; an electric motor mounted on the housing; and a speed reduction mechanism for transmitting the rotational power of the electric motor to a ball screw mechanism via a motor shaft with reducing the motor speed; the ball screw mechanism being adapted to convert the rotational motion of the electric motor transmitted via the speed reduction mechanism to an axial linear motion of a driving shaft and comprising a nut formed with a helical screw groove on its inner circumference and rotationally but axially immovably supported by bearings on the housing, and a screw shaft coaxially integrated with the driving shaft, formed with helical screw groove on its outer circumference corresponding to helical screw groove of the nut, adapted to be inserted into the nut via a large number of balls, and supported on the housing not rotationally but axially movably characterized in that the housing comprises a first housing and a second housing arranged with their end faces being abutted against each other, and that joining surfaces of the end faces of the first and second housings are sealed by curing liquid curable material. |
