| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a linear actuator in which uneven wear can be suppressed without provision of a cam follower. <P>SOLUTION: The linear actuator comprises a ball screw mechanism 20 to convert a rotational motion transmitted to the rotational motion component 12 into a linear motion, wherein the ball screw mechanism has a guide projection 36, 37 projecting in a radial direction and provided in the linear motion component, and a guide member 40 engaged with the guide projection and disposed in a securing portion 14b facing the linear motion component to guide the guide projection in an axial direction, and has a structure to make the linear motion component subject not to rotate. The guide member forms a pair of sliding surfaces 40b2, 40c2 facing with each other to extend in an axial direction, and is rotatably held in supporting pores 41a, 41b formed in the axial direction at a position facing the liner motion component of the securing portion. An outer end position in a radial direction to the guide projection whose side surface slides on the pair of sliding surfaces in a radial outer direction of a rotating center Pg of the guide member. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
