Patent ID: 6178837
Filing Date: 2001-01-30
Classification: F16D,F16H,H02K,Y10T

Abstract:
An electric actuator comprising:a cylindrical main actuator body;a rotary driving source which is arranged in a driving unit disposed beside said main actuator body;a rotary driving force-transmitting member which is coaxially coupled to a driving shaft of said rotary driving source, for transmitting a rotary driving force of said rotary driving source;a displacement member which surrounds said rotary driving force-transmitting member and which is displaceable along an axial direction of said main actuator body in accordance with an engaging action with said rotary driving force-transmitting member;a sensor which is used to detect a magnetic field of a permanent magnet displaceable integrally with said displacement member; anda fastening member which is disposed at a side surface portion of said main actuator body and which is used to fasten a lead wire of said sensor,wherein said rotary driving force-transmitting member is composed of a feed screw shaft, and said displacement member is displaceable along said axial direction in accordance with an engaging action effected by a male thread formed on an outer circumference of said feed screw shaft and a female thread formed on an inner circumferential surface of said displacement member.