Provided is an electric actuator including: an electric motor capable of rotating forward and backward; and a motion conversion mechanism configured to convert rotation of the electric motor into a reciprocating linear motion of a screw shaft, the motion conversion mechanism including: a nut configured to be rotationally driven by the electric motor; and the screw shaft capable of being threadedly inserted through the nut in a back and forth movable manner. A lubricant holding portion having an outer diameter larger than a diameter of a screw hole of the nut and being capable of housing a lubricant is formed on an inner periphery of an end of the nut in an axial direction. A lid member configured to cover an opening end of the lubricant holding portion in an axial direction is provided. Thus, an electric actuator can prevent wear at a threaded engagement portion between a nut and a screw shaft by sufficiently lubricating the threaded engagement portion, thereby being capable of improving the durability of the nut and the screw shaft.
ELECTRIC ACTUATOR
ELEKTRISCHER STELLANTRIEB
ACTIONNEUR ÉLECTRIQUE
03.04.2024
Patent
Elektronische Ressource
Englisch
ELECTRIC ACTUATOR AND ELECTRIC ACTUATOR MANUFACTURING METHOD
Europäisches Patentamt | 2018
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