| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric actuator which secures the rigidity and durability of a housing, is suppressed in cost by using a simple screw shaft whirl-stop mechanism, and improved in reliability.SOLUTION: A cylindrical bag hole 12 is formed at a housing 2b, a bottomed cylindrical sleeve 17 in which a recessed groove 17 extending to an axial direction is fit up to a bottom 33 of the bag hole 12 at an internal periphery, the sleeve 17 is formed into a cup shape which is composed of a large-diameter part 29 and a bottomed cylinder part 30 extending to the axial direction from the large-diameter part 29 at one end, a flat part 29a is formed at a position opposing the large-diameter part 29, an opening part 31 along a shape of the large-diameter part 29 of the sleeve 17 is formed at the bag hole 12, the sleeve 17 is whirl-stopped with respect to the bag hole 12, a lock pin 15 arranged at an end of a screw shaft 10 is engaged with the recessed groove 17a, the screw shaft 10 is non-rotatably movably supported in the axial direction, and a bottom 32 of the sleeve 17 is formed into a simple circular arc shape.SELECTED DRAWING: Figure 1 |
