公开(公告)号：US09630696B2

公开(公告)日：2017-04-25

申请号：US15086021

申请日：2016-03-30

Applicant: NHK SPRING CO., LTD.

Inventor： Sachio Ooshita

IPC: B63H20/20 ,  B63H20/14 ,  F16H25/20

CPC classification number: B63H20/14 ,  B63H20/20 ,  F16H25/2015 ,  F16H2025/204 ,  F16H2025/2081

Abstract: According to one embodiment, a shift actuator includes a main body section and a shaft section. The main body section has an electric motor which has a vertically extending rotating shaft, and a gear mechanism which rotates the shaft section in accordance with the rotating shaft. The shaft section has a threaded shaft extending parallel to the rotating shaft and made to rotate by the gear mechanism in accordance with the rotating shaft and a movable nut which is screwed onto the threaded shaft and moves upward or downward with rotation of the threaded shaft. The movable nut is connected with a shift member which changes the gears of a propeller shaft.