ELECTRIC LINEAR ACTUATOR

摘要

Provided is an electric linear actuator designed to reduce damage and wear of the housing and to increase durability and strength and improve reliability while being designed to be more lightweight. In the electric linear actuator (1) configured from a screw axis (10), which is supported so as to be incapable of rotating with respect to a housing (2) but able to move in the axial direction, a sleeve (17) obtained from a sintered alloy is fitted into a blind hole (12) of the housing (2) until the sleeve is in close contact with the bottom of the blind hole. A pair of recessed grooves (17a), which extend in the axial direction, are formed on the inner circumferential surface of the sleeve (17) at opposite positions, and engage with locking pins (15) that are embedded in an end of the screw axis (10). Additionally, a tapered chamfered section (18c) is formed on an end of a nut (18) and the outer diameter of the end face side of the chamfered section (18c) is set to have a smaller diameter than the distance between the recessed grooves (17a).