| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric linear actuator capable of reducing slide friction and abrasion, and including a rotation prevention mechanism of a screw shaft, of a simple structure and low costs.SOLUTION: In an electric linear actuator including a ball screw mechanism 8 for converting a rotating motion of an electric motor 3 into an axial linear motion of a driving shaft 7 through a deceleration mechanism 6, a projection 21 is formed on an inner periphery of a bottomed hole 9 of a housing 2a, a sleeve 18 is fitted to the bottomed hole 9, the sleeve 18 is formed by press working from a liquid-phase plated cold rolled steel sheet, and provided with a recessed groove 18a axially extended and equally arranged in a circumferential direction, a through hole 19 having a petal-shaped cross-section and radially penetrating through an end portion of the screw shaft 12, is formed, and a guide pin 20 is fitted and inserted to the through hole 19, and engaged with the recessed groove 18a of the sleeve 18. |
