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
2024-04-03
Patent
Elektronische Ressource
Englisch
ELECTRIC ACTUATOR AND ELECTRIC ACTUATOR MANUFACTURING METHOD
Europäisches Patentamt | 2018
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