A first drive cam groove extends from a drive cam specific position to one side in a circumferential direction. A second drive cam groove extends from the drive cam specific position to the other side in the circumferential direction, and an inclination angle of a groove bottom with respect to one end surface of the drive cam main body is larger than that of the first drive cam groove. A first driven cam groove extends from a driven cam specific position to one side in a circumferential direction. A second driven cam groove extends from the driven cam specific position to the other side in the circumferential direction, and an inclination angle of a groove bottom with respect to one end surface of the driven cam main body is larger than that of the first driven cam groove.

A prime mover includes a stator fixed to a housing and a rotor provided rotatably relative to the stator, and is capable of outputting a torque from the rotor. A speed reducer includes a sun gear, multiple planetary gears, a carrier, a first ring gear, and a second ring gear. The sun gear receives the torque from the rotor. The rotor is provided on a radially inner side of the stator, and is connected to the sun gear to be rotatable integrally with the sun gear.

A brake system for an electric wheel drive unit has a housing that can be attached securely to the vehicle frame. The housing has a flange region and a shaft-like wheel carrier region secured to the flange region. A first brake component is connected to the housing and includes a first support part attached directly on a radial outer side of the wheel carrier region and a first brake disc element rotationally fixed to the first support part. A second brake component is rotatably mounted relative to the housing and has a second support part and a second brake disc element rotationally fixed to the second support part. A hydraulic actuation device is provided with one or more pressure pistons arranged. A sliding element is provided for moveably coupling the pressure pistons with one of the brake disc elements.

Disclosed is an electromechanical brake including a piston provided to advance and retreat to press a brake pad, a power conversion unit including a spindle provided to rotate by receiving a driving force from an actuator, a nut connected to the spindle to advance or retreat inside the piston depending on rotation directions of the spindle to advance or retreat the piston, and a return means provided to forcibly retreat the piston when the nut retreats, wherein the return means includes a locking protrusion provided to protrude in a radial direction from an outer surface of the nut, and a groove portion provided on an inner surface of the piston to allow the locking protrusion to be inserted.

An electronic parking brake device including: a plate part having a brake shoe rotatably mounted thereon; a housing part mounted on the plate part and configured to guide hydraulic pressure; a motor part mounted on the housing part, and driven when power is applied thereto; a piston part mounted on the housing part, and moved by hydraulic pressure so as to operate the brake shoe; and an operation part embedded in the housing part, disposed between the piston parts, and driven by the motor part so as to push the piston parts.

A brake system includes an electromechanical brake having a friction surface, a lining support, an electric motor for moving the lining support, a spring acting on the lining support, and a control and monitoring unit. A control and monitoring unit ascertains from at least one first value ascertained during a first movement of the lining support by the electric motor, an operating behavior value for a real operating behavior of an operating parameter of the relevant brake, and ascertains, by a comparison of the at least one real operating behavior value to at least one stored operating behavior expectation, a correction factor. The brake control system corrects by the one correction factor and activates a regulator of the electric motor using the corrected brake control signal. The control and monitoring unit is performs a calibration by a spring force of the at least one spring during the first movement.

A latching mechanism for a brake actuator is provided. The latching mechanism comprising an annular flange and a plurality of resilient elements extending radially inwardly from the annular flange. Each of the plurality of resilient elements comprises a U-shaped cross-section and a tooth on a radially inner end. The tooth is configured to conform to and engage with ratchet teeth of a wear compensation sleeve of a brake actuator.

An object of the present invention is to provide a brake control device and a brake system capable of braking with a shortened braking response when shifting from non-braking to braking. A brake control device 10 includes a command value calculation unit 4 that calculates an operation command value required to make a pressing force by which a brake pad 11a is pressed against a brake disc 11b reach a target thrust value. The command value calculation unit 4 includes: a clearance command calculation unit 43 that calculates a command value required for contact between the brake pad 11a and the brake disc 11b; and a thrust command calculation unit 40 that calculates a command value required for reaching the target thrust from a state where the brake pad 11a and the brake disc 11b are in contact with each other. When calculating the operation command value from a state where the brake pad 11a and the brake disc 11b are separated, the command value calculation unit 4 calculates the operation command value by integrating the command value calculated from the clearance command calculation unit 43 and the command value calculated from the thrust command calculation unit 40.

The present invention is to provide a vehicle-mounted apparatus having a biasing structure using a coil spring capable of reducing a lateral force of a coil spring that is applied to a biasing target member. When N1, n1, N0, and n0 represent the number of effective turns when the relief valve spring 37 is set in a valve hole 34 of a spool 29 in a compressed state, a value of an integer of N1, the number of effective turns when a length of the relief valve spring 37 is a natural length, and a value of an integer of N0, respectively, the spring 37 satisfies an equation 1: 0≤N1−n1≤0.25 or an equation 2: 0.75≤N1−n1<1.

The present invention relates to a brake actuating mechanism for a disc brake having an optimized adjusting device.