Provided is an electric braking device wherein a friction member is pressed, via a piston driven by an electric motor, against a rotary member that rotates integrally with a vehicle wheel, thus generating a braking force on the vehicle wheel. The electric braking device is provided with: a controller for controlling the electric motor; a rotation angle sensor for detecting a rotation angle of the electric motor; and a return mechanism for applying a return force to a piston in a direction away from the rotary member. Furthermore, the controller executes a proper/improper determination to determine whether the return mechanism is operating properly on the basis of a change in the rotation angle after conduction of electricity to the electric motor is stopped.

A device for an automatic parking brake includes a first microchip and a second microchip. The first microchip and the second microchip are configured to actuate an end stage of the automatic parking brake. The first microchip and the second microchip are configured in a redundant manner with respect to one another in relation to actuating the end stage.

A controller includes a failure detection unit that detects a failure in a first power supply system, and a power supply system control unit that closes a relay in a case where an execution of an automatic parking function starts and, during the execution of the function, causes the first power supply system to supply power, without causing a second power supply system to supply power, to the electric brake device, by setting a target output voltage of the second power supply system lower than an output voltage of the first power supply system when the failure detection unit does not detect the failure, and operates the electric brake device by setting the target output voltage to a voltage within a range in which the electric brake device is operable when the failure detection unit detects the failure.

A parking brake apparatus for a vehicle including a motor section receiving electric power, and generating power; a power transmission section rotated by driving the motor section; a pair of pressing units receiving power from the power transmission section and pressing a brake pad; a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit; and a caliper housing having installed therein the pressing units, wherein the motor section is mounted to an upper surface of the caliper housing.

Disclosed is an actuator for a brake device. In accordance with an aspect of the disclosure an actuator for a brake device includes a motor; a first reduction gear unit connected to the motor; and a second reduction gear unit connected to the first reduction gear unit; wherein the first reduction gear unit is provided as a planetary gear assembly, and the second reduction gear unit is provided as a bevel gear assembly.

A brake apparatus for a vehicle may include: a housing; a pair of pressing parts installed inside the housing, and configured to receive power from a driver and press a brake pad; a load transfer part installed between the pair of pressing parts, and configured to transfer a pressing load of any one of the pair of pressing parts to the other pressing part; and a constraint part installed in the housing such that a length thereof is adjustable, and configured to selectively constrain an operation of the load transfer part depending on a protruding length thereof into the housing.

A parking brake apparatus for a vehicle includes a pair of pressing units receiving power from a driving unit, and pressing a brake pad; a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit; and a load transmission unit restraint unit selectively restraining driving of the load transmission unit.

An electric booster for a vehicle including: a disc holder accommodating a reaction disc, a screw nut rotated in conjunction with an operation of a motor, a screw bolt linearly moved in conjunction with a rotation of the screw nut, a boosting block disposed between the reaction disc and the screw bolt, and contacting a radially outer portion of the reaction disc when the screw bolt moves, a pedal rod contacting a radially central portion of the reaction disc through the screw bolt and the boosting block, a disc holder pressing hole connected to the screw bolt, and disposed to face the disc holder, and a first breakage prevention gap part formed between the disc holder and the disc holder pressing hole.

An electromechanical brake apparatus includes a housing supporting an inboard brake pad and an oppositely facing outboard brake pad for selective frictional contact with a rotor interposed longitudinally therebetween. An adjuster ramp assembly indirectly receives torque from the motor unit. A spindle is provided for selectively moving the inboard brake pad longitudinally. The spindle is operatively connected with the adjuster ramp assembly to indirectly receive torque from the motor unit therethrough. A leading ramp assembly is configured to transmit applied torque from the motor unit to the adjuster ramp assembly via at least one ramp ball longitudinally interposed therebetween. A predetermined amount and direction of torque is applied to each of the adjuster ramp assembly and the leading ramp assembly to assist with a selected one of (1) service brake application and (2) service brake release functions. The electromechanical brake apparatus is operative, at different times, for both functions.

An electronic parking brake system includes an electronic parking brake, including an electric motor, and a controller configured to control the electric motor to engage the electronic parking brake, and when a vehicle motion detection signal is received from a black box through a controller area network (CAN) bus in a state where an ignition is turned off and the electronic parking brake is engaged, the controller is configured to re-engage the electronic parking brake.