Patent ID: 9631685
Date: 2017-04-25
CPC Classifications: B60T,F16D,H02K

Claim:
1. An electric actuator comprising: a shaft member on an outer circumference of which a spiral groove is formed; a nut member that is fitted onto the shaft member; a power transmission member that is disposed between an inner circumference of the nut member and the groove; and a guide portion configured to guide linear motion of the shaft member, wherein rotation of the nut member about the shaft member by means of a rotational driving force of an electric motor results in the linear motion of the shaft member, and the guide portion includes a rotating mechanism portion configured to rotate the shaft member about an axis when the shaft member is in the linear motion, wherein the guide portion includes a reverse rotating portion configured to rotate the shaft member, which is in the linear motion, in an opposite direction to a rotation direction of the nut member, and wherein the guide portion includes a forward rotating portion configured to rotate the shaft member, which is in the linear motion, in the same direction as a rotation direction of the nut member.