A disk brake with lower cost and improved maintainability is provided. The brake caliper includes at least one actuating device for actuating the disc brake using a moveably guided bridge. The bridge has at least one threaded hole into which an actuating spindle is displaceably located. A brake disk end of the actuating spindle penetrates a caliper closing plate facing the brake disk. The positioning spindle carries a rotatably-mounted pressure piece which presses a brake pad against the brake disc. The opening is sealed by a bellows retained on the brake caliper on one side and on the pressure piece on the other side. A securing ring non-rotatably located on the actuating spindle and rotatably connected to the thrust piece interacts with the bellows during brake application and/or release to maintain a desired air gap between the brake disk and brake pad.

A parking brake for a wheel rotor having a brake pad associated therewith includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages. Spindles are threadably connected with each piston. A clutch unit is connected to the spindles. The clutch unit has a first condition allowing relative rotation between the spindles and the pistons such that the pistons are axially movable within the passages and into engagement with the brake pad in response to hydraulic pressure applied to the pistons. The clutch unit has a second condition preventing relative rotation between the spindles and the pistons such that pistons remains engaged with the brake pad when hydraulic fluid pressure is removed from the pistons.

A parking brake for a wheel rotor having a brake pad associated therewith includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages. Spindles extend into and are connected with each piston. A clutch unit is connected to the spindles and includes a motor. The clutch unit has a first condition allowing for rotation of the spindles in response to hydraulic pressure applied to the pistons such that the pistons are axially movable within the passages and relative to the spindles into engagement with the brake pad. The clutch unit has a second condition for rotating the spindles to drive the pistons into the brake pad and apply the parking brake.

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.

A brake caliper for a vehicle disc brake including a pair of brake pads, and brake a disc positioned in between the brake pads is provided. The brake caliper includes a thrust piece that is configured to move at least one of the brake pads relative to the brake disc, an adjuster unit in threaded engagement with the thrust piece, and a spring unit operatively coupled to the adjuster unit and the thrust piece. The spring unit has a latching element and the adjuster unit has a corresponding latching interface, wherein the latching element is arranged to engage the latching interface when the adjuster unit is in threaded engagement with the thrust piece, and the spring unit further has a mounting element in engagement with the thrust piece to provide a resistance against a rotational movement the adjuster unit relative to the thrust piece.

A parking brake apparatus for a vehicle includes a motor section receiving electric power from an outside, and generating power; a power transmission section rotated by driving the motor section; a pair of pressing units having rotation axes that are disposed parallel to a rotation axis of the power transmission section, and pressing a brake pad by receiving power from the power transmission section; and 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.

A parking brake apparatus for a vehicle including a motor section receiving electric power from an outside, and generating power; a power transmission section rotated by driving the motor section, and including transmission worm gears; a pair of pressing units receiving power from the power transmission section and pressing a brake pad; and 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.

An adjuster for an air disc brake includes an over-torque clutch arrangement that includes an adjuster drive plate having ramped detents, and a ball-carrying plate having pockets for retaining ball bearings. Ball bearings are carried and retained in the ball-carrying plate, and transmit rotation between the adjuster drive plate and the ball-carrying plate below a torque threshold. Above a torque threshold, the balls move axially away from the adjuster drive plate against the force of a spring, and ride up the ramped detents. Above the torque threshold, rotation is not transmitted.

An adjusting device is disclosed for adjusting friction surface wear on brake linings and a brake disk of a disk brake. The adjusting device is couplable to a brake application device on the drive side, and to a spindle unit of the disk brake on the output side. The adjusting device includes a drive element on both sides of which a rolling element assembly is axially arranged; a pressure element; an output element coupled to the pressure element for coupling to a coupling wheel; an energy storage element; and a support body, one end of which is connected to a bearing plate and around which the drive element, the rolling element assemblies, the output element and the energy storage element are arranged axially in series with the bearing plate. The energy storage element is arranged between a bearing portion of the support body and the pressure element.

A cast iron brake caliper of a disc brake, includes a caliper back and caliper head. connected to the caliper back via tension struts arranged parallel and spaced apart from one another. The caliper head has a housing surrounding an accommodation chamber for functional parts and, separate from and adjacent to the housing, an integrally molded, protruding connector, which accommodates a bearing bore for a fixed bearing, and is connected to the housing by way of an integrally molded rib. The brake caliper is designed such that the rib is guided across the connector up to and into an outer edge region of the caliper head.