公开(公告)号：US20210254691A1

公开(公告)日：2021-08-19

申请号：US17049502

申请日：2019-04-03

Applicant: SINTOKOGIO, LTD.

Inventor： Seiichi MURASE ,  Yuu ISHIDA ,  Takemasa KONDO

IPC: F16H25/24 ,  F16H25/22 ,  F16H57/04

Abstract: An electrically driven cylinder in which the supply of a lubricant is not needed for a long period of time. The electrically driven cylinder, comprising: a screw mechanism portion that converts rotational motion of an electric motor into linear motion; a rod that reciprocates by linear motion of the screw mechanism portion; a bushing member that regulates swinging of the rod; and a key member which is inserted into a rod groove portion provided along an axial direction of the rod and which regulates rotation of the rod; a lubricant being sealed in the screw mechanism portion, the bushing members having a plurality of holes in which a lubricant is embedded, and the key member having a plurality of holes in which a lubricant is embedded.