Electric brake actuator, and brake system for vehicle

摘要

A motor cylinder device (16) is configured with a cylinder mechanism (76) provided with first and second slave pistons that are displaced along a hydraulic pressure chamber; an electric motor (72) for driving first and second slave pistons; and an actuator housing (75) formed separable from the cylinder mechanism (76), wherein the actuator housing houses a gear mechanism for transmitting a rotational driving force of the electric motor (72), and a conversion mechanism for converting the rotational driving force transmitted through the gear mechanism, into a linear movement and transmitting the linear movement to the piston.

主权项

1. An electric brake system, comprising:
a master cylinder configured to generate a master cylinder pressure according to a braking operation by a driver, and generate a brake hydraulic pressure, based on an electric signal according to the braking operation; and an electric brake actuator that is communicated and connected with the master cylinder, the electric brake actuator comprising:
a cylinder mechanism provided with a piston that is displaced along a hydraulic pressure chamber:an electric motor configured to drive the piston; andan actuator housing formed separable from the cylinder mechanism, wherein the actuator housing houses a gear mechanism configured to transmit a rotational driving force of the electric motor, and a conversion mechanism configured to convert the rotational driving force transmitted through the gear mechanism, into a linear movement and transmit the linear movement to the piston, wherein the actuator housing includes a mount portion configured to mount the electric brake actuator to a vehicle, wherein the mount portion comprises:
a first boss portion and a second boss portion protruding toward left and right sides in a direction substantially perpendicular to an axial line of the cylinder mechanism; anda third boss portion protruding downward from the cylinder mechanism and perpendicular to the first and second boss portions.