A motion conversion mechanism of a brake device includes a rotation member and a linear motion member that linearly moves accompanying the rotation of the rotation member. The rotation member is rotationally driven through a third gear. A male screw and a female screw mesh with each other on the side opposite to the brake shoe of the third gear, where one end of an actuating member receives a force for actuating the brake shoe from the linear motion member, and the other end actuates the brake shoe. The guide member that guides the actuating member is made of a material different from that of the rotation member, and slidably guides the actuating member in the axial direction.

A motion conversion mechanism of a brake device includes a rotation member and a linear motion member that linearly moves accompanying the rotation of the rotation member. The rotation member is rotationally driven through a third gear. A male screw and a female screw mesh with each other on the side opposite to the brake shoe of the third gear, where one end of an actuating member receives a force for actuating the brake shoe from the linear motion member, and the other end actuates the brake shoe. The guide member that guides the actuating member is made of a material different from that of the rotation member, and slidably guides the actuating member in the axial direction.

A brake actuator includes: a housing; an electric motor with a hollow motor shaft rotating; a rotating shaft disposed inside the motor shaft to be coaxial therewith; a piston with a rear end disposed inside the motor shaft and a front end engaged with the friction member; a speed reduction mechanism decelerating rotation transmitted from the motor shaft and transmitting the rotation to the rotating shaft; and a motion conversion mechanism converting a rotating motion of the rotating shaft into an advancing/retracting motion of the piston. The motor shaft is rotatably supported by the housing at an outer peripheral surface thereof, and the rotating shaft is rotatably supported by an inner peripheral surface of the motor shaft via rollers at an outer peripheral surface thereof as well as by the housing via a thrust bearing at a rear end of the rotating shaft.

Disclosed herein is an electronic brake apparatus that includes a spring pack, a first piston in which the spring pack is mounted, a bolt screw rotated in conjunction with a motor and having one end in point contact with the spring pack, a fixing member configured to bind the bolt screw to the first piston, and a second piston screwed to the other end of the bolt screw.

An electromechanical brake pressure generator for a hydraulic braking system of a vehicle. The electromechanical brake pressure generator encompasses a screw drive assemblage for converting an input-drive-side rotational motion into a translational motion for brake pressure generation. The screw drive assemblage encompasses a spindle that is rotatable via an electric motor, a spindle nut that interacts with a thread of the spindle so that the spindle nut is axially displaceable with a rotation of the spindle, and a housing that at least partly surrounds the spindle and the spindle nut. The screw drive assemblage additionally encompasses a drive wheel, which is disposed nonrotatably on the spindle and by way of which the spindle is connected to the electric motor. The spindle and the drive wheel are mounted, via a common bearing, rotatably with respect to the stationary housing. The bearing is radially surrounded at least partly by the drive wheel.

In order to prevent rotation of a piston of a hydraulic unit of a hydraulic vehicle braking system, a sleeve is provided having axially parallel cylindrical pins constituting rotation prevention elements on its inner circumference, the rear ends of which elements are pressed into axially parallel holes in an inwardly projecting flange of the sleeve, and the front ends of which are inserted into axially parallel blind holes in a diameter step in a mouth of the cylindrical hole in a hydraulic block of the hydraulic unit. A method for assembling the hydraulic unit thus configured is also described.

A rear electric brake ECU includes a delay element. More specifically, the delay element is disposed between an arithmetic element of the rear electric brake ECU and a first switching element (an FET) for driving a solenoid of a parking mechanism. The delay element delays a signal for driving this first switching element. Further, the rear electric brake ECU includes a diagnosis device for diagnosing the actuation state of the arithmetic element. The diagnosis device is set so as to be able to shut off power supply to the solenoid regardless of the state of a signal (a driving signal) of the solenoid if diagnosing that the actuation state of the arithmetic element is abnormal.

An actuator for a wheel brake unit of a vehicle is disclosed, wherein the actuator has an actuation element for performing an actuation, and is configured to receive, through a power supply, a power for performing the actuation. The actuator is characterized by a detection unit, configured to receive a control signal and to detect a power shortage indicative of an emergency situation, and to generate an emergency signal if the control signal is received or if the power shortage is detected, as well as by a backup energy storage, configured to store energy sufficient for causing the actuation element to perform a complete brake actuation at least once and, upon receiving the emergency signal, to provide at least a part of the energy needed by the actuation element to perform the actuation.

A brake system control device for a vehicle that has a hydraulic vehicle brake and an electromechanical brake device with at least one electric brake motor includes a microcontroller for actuating at least one active brake component. The brake system control device further includes a system ASIC for detecting wheel revolution rate signals and a brake motor ASIC for actuating the electric brake motor of the electromechanical brake device. The brake motor ASIC includes wheel revolution rate signals that are configured to be detected and the microcontroller is connected to the system ASIC and the brake motor ASIC via communications interfaces.

A brake system control device for a vehicle that has a hydraulic vehicle brake and an electromechanical brake device with at least one electric brake motor includes a microcontroller for actuating at least one active brake component. The brake system control device further includes a system ASIC for detecting wheel revolution rate signals and a brake motor ASIC for actuating the electric brake motor of the electromechanical brake device. The brake motor ASIC includes wheel revolution rate signals that are configured to be detected and the microcontroller is connected to the system ASIC and the brake motor ASIC via communications interfaces.