| 摘要 |
PROBLEM TO BE SOLVED: To provided an electric linear actuator that is capable of reducing sliding friction and wear and that has a simple structure for cost reduction.SOLUTION: In an electric linear actuator that includes a ball screw mechanism 8 which converts a rotational motion of an electric motor 3 into a linear motion in an axial direction of a driving shaft 7 via a speed reduction mechanism 6, a cylindrical sleeve 18 is fitted into a housing hole 9 of a housing 2a, and a pair of recessed grooves 18a are formed at opposing positions extending in an axial direction in an inner periphery of the sleeve 18 so that a guide pin 20 implanted in an end portion of a screw axis 12 is engaged. An annular groove 21 is formed in an opening portion of the housing hole 9 of the housing 2a, and the sleeve 18 is retained in a pressed state by a hole retaining ring 22 that is mounted on the annular groove 21 and provided with a curved portion which has peaks at positions that are laterally symmetrical around a cut-out portion. |
