ELECTRIC ACTUATOR AND VEHICLE BRAKE SYSTEM

摘要

An electric actuator includes a shaft member, a nut member, a power transmission member, and a guide portion. A spiral groove is formed on an outer circumference of the shaft member. The nut member is fitted onto the shaft member. A power transmission member is disposed between an inner circumference of the nut member and the groove. The guide portion is configured to guide linear motion of the shaft member. 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. 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.

主权项

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.