A method adjusts the slack of a brake assembly having a brake disc, a brake pad, an actuator with an output shaft driven in a forward direction to bring the brake pad and brake disc into frictional engagement defining a braking position and a reverse direction to disengage the brake pad and brake disc and to move the brake pad into a rest position, and a slack adjuster for adjusting a predetermined axial slack distance between the brake pad and the brake disc. The brake pad is moved from the rest position in the reverse direction into a predetermined reference position, and an adjustment of the axial slack distance between the brake pad and brake disc is initiated.

A sensor assembly for determining an amount of wear on a brake pad in a disc brake includes a shaft extender having a first end coupled to one end of a shaft of an adjustment mechanism of a caliper of the disc brake for rotation with the shaft about a rotational axis and a second end defining a shaft extension. A sensor generates a signal indicative of a degree of rotation of the shaft extension with the signal indicative of the amount of wear on the brake pad. The sensor includes a body coupled to the shaft extension and configured for rotation about an offset axis offset from the rotational axis in response to rotation of the shaft extension about the rotational axis and a measurement device configured to generate the signal responsive to rotation of the body about the offset axis. A housing encloses the sensor.

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

An automotive electro-mechanical brake apparatus includes a clamping unit provided to be able to axial move forwards and rearwards thereof along a torque member and configured to press a disc through a friction pad by moving rearward in braking, a pressing unit accommodated in the clamping unit, selectively moving forward or rearward when rotation is input thereto, and configured to move forward, press the disc through the friction pad, and guide rearward movement of the clamping unit in braking, a gear unit engaged with the pressing unit, and a clutch unit connected to the gear unit, configured to transmit rotational driving force for inputting the rotation to the pressure unit to the gear unit, and configured to prevent displacement against reverse rotation input from the gear unit in driving.

A two-stage actuation mechanism for a brake system includes a first lead screw having a first plurality of threads, a second lead screw having a second plurality of threads, a preloaded torsional spring, and an actuator assembly having an input shaft coupled with the preloaded torsional spring of the two-stage actuation mechanism. The preloaded torsional spring is configured to activate a first stage of movement of the two-stage actuation mechanism via rotation of the first lead screw. The size and pitch of each of the first and second lead screws are configured to minimize power consumption by the actuator assembly and satisfy a desired actuation time with a low current consumption and high actuator gear train ratio.

A brake assembly and a method of adjusting a brake assembly. A tool may be insertable through a through hole in a caliper housing and into a shaft cavity of a shaft of a wear adjuster mechanism that is configured to adjust a running clearance of a brake pad assembly.

The invention relates to a wrap spring for blocking an unwanted rotational movement of a rotary element. The invention further relates to an adjusting device for adjusting the wear of brake pads of a disk brake. An adjusting device comprises a guide sleeve in which a wrap spring is arranged, a grooved ring which encompasses the guide sleeve, wherein the grooved ring is coupled to a closure cap via a torsion spring, and an opening ring encompassing the grooved ring. The invention further relates to a disk brake for a vehicle, in particular for a utility vehicle, wherein the disk brake comprises an adjusting device with a wrap spring.

A brake caliper for a vehicle brake is provided. The vehicle brake includes a pair of brake pads, configured to be coupled to the brake caliper, and a disc positioned between the brake pads. The brake caliper includes an adjuster unit mounted to the brake caliper. The adjuster unit includes a gearwheel configured to be rotary driven in a first direction, and an adjuster nut operatively coupled with the gearwheel and configured to be operatively coupled with one of the brake pads, such that a rotational movement of the gearwheel in the first direction is converted, by the adjuster nut, into an axial movement of the brake pad towards the disc. The gearwheel is mounted in the brake caliper such that the gearwheel is axially fixed relative to the brake caliper, while the adjuster nut and the gearwheel are in an axially slidable engagement with respect to one another.

Provided is an electromechanical brake system comprising an actuator of an electromechanical brake operated by a motor, the electromechanical brake system including: a motor driving unit configured to drive the motor; and a control unit configured to be electrically connected to the motor driving unit, wherein the control unit is configured to: calculate a first rotation angle of a spindle in a brake apply mode of the electromechanical brake, calculate a second rotation angle of the spindle in a braking release mode of the electromechanical brake, and when a difference between the calculated first rotation angle and the calculated second rotation angle exists, control a notification device to notify a wear state of a brake pad.

Disclosed herein a friction brake system comprises a braking member connectable to at least one brake pad and configured for pressing the brake pad against a friction surface and a transmission unit configured for converting a rotary motion generated by an actuator into a braking motion of the brake pad wherein the transmission unit comprises a ball-in-ramp assembly having a first plate with at least one groove, a second plate with at least one groove facing the groove of the first plate, and at least one ball arranged between the first plate and the second plate wherein the ball is retained by the groove of the first plate and the groove of the second plate, wherein the ball-in-ramp assembly is configured to convert a rotary motion of the first plate into a translational motion of the second plate relative to the first plate.