ELECTRIC ACTUATOR
    1.
    发明公开
    ELECTRIC ACTUATOR 审中-公开

    公开(公告)号:US20240003410A1

    公开(公告)日:2024-01-04

    申请号:US18037165

    申请日:2021-11-12

    CPC classification number: F16H25/24 F16H57/0464 F16H57/0497 F16H2025/2081

    Abstract: An electric actuator includes an electric motor, a nut (a first screw member), and a screw shaft (a second screw member) threadedly inserted through the nut to be able to advance and retreat. Each of threads of the screw shaft includes two flanks and a crest portion connecting the flanks to each other. Grease is used as a lubricant. A groove portion, which is cut out from the crest portion toward a root portion side, is formed on each of the threads of the screw shaft. Further, a taper surface, which flares becoming circumferentially farther away from the groove portion, is formed on at least a part of each of peripheral edges of each groove portion on flank sides. The electric actuator can promote lubrication of a threadedly engaged portion between the first and second screw members, thereby improving motion conversion efficiency and reducing wear on the threadedly engaged portion.

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