A brake apparatus for a vehicle may include: a pair of screw bars located in a caliper body; a pair of nut parts configured to cover outsides of the respective screw bars, engaged with the respective screw bars, and selectively moved toward a brake pad or moved to an opposite side of the brake pad; a pair of piston parts moved with the nut parts, and configured to apply pressure to the brake pad when pressed by the nut parts or remove the pressure applied to the brake pad when a pressing of the nut parts is removed; an elastic spring installed on each of the piston parts, and configured to apply an elastic restoring force to cause the piston part to return to an original position; and a spring retainer mounted on each of the piston parts, and brought into contact with the elastic spring.

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 caliper arrangement includes a housing, a restoring device, a first brake lining arrangement and a second brake lining arrangement. The first brake lining arrangement and the second brake lining arrangement can be moved relative to one another from a respective starting position with a reduction of an initial spacing which exists between them. The restoring device includes first and second restoring elements. The first restoring element may prestress the first brake lining arrangement into its starting position, while the second restoring element may prestress the second brake lining arrangement into its starting position. The first and/or second restoring elements may be supported, on both sides of a central region of the brake lining arrangement, on the associated brake lining arrangement. The first and/or second restoring elements may be twisted elastically at least in sections in order to generate the prestress.

A spring for a caliper body where the spring may be shaped to be arranged straddling a brake disc for applying an elastic action on at least one brake pad to bias it away from said brake disc. The spring may have a first thrust portion and a second thrust portion adapted to apply an elastic action on at least one brake pad, biasing the brake pad at least away from the brake disc. The spring may also have a first coupling portion adapted to couple the spring with a first side bridge. The spring may also have a second coupling portion adapted to couple the spring with the second side bridge on a tangentially opposite part with respect to the first coupling portion. The spring may also have a backing portion. The spring may also have at least one concave spring portion.

An overspeed brake system for use in an elevator powerhead is provided. A brake rotor is attachable to a cable drum to rotate with a cable drum. A brake member selectively engages the brake rotor upon transition of an actuation lever from a first position to a second position. A biasing member acts on the actuation lever to bias the actuation lever from the first position towards the second position. A latch arrangement has a first orientation maintaining the actuation lever in the first position and a second orientation releasing the actuation lever for transitioning from the first position to the second position. The latch arrangement transitions from the first orientation to the second orientation when a speed sensing arrangement senses that the rotational speed of the cable drum is at least a predetermined rotational speed.

Methods and corresponding control devices for releasing an electric actuator in a reliable manner, such as an electric parking brake in particular, in a motor vehicle brake system. The aim of the invention is to provide an improved function and architecture which helps prevent the disadvantages of open-loop control systems when using a rationalized sensor system, thereby obviating closed-loop control systems. This is achieved by a release method and a corresponding electronic control unit which obtains an especially modulated change in the power requirement during the release process upon impacting the quasi-elastic release end stop of the electric actuating unit such that the change is fed back, the change being detected in order to be used as information for a power interruption or a termination of the power supply to the electric actuating unit.

A motor brake device, comprising a supporting assembly (1), a movable rotating disc (2), a pressing assembly (4), a lower cover (5), a sliding block (6), an elastic member, a brake assembly (7), and an upper cover (8). The supporting assembly (1) is fixed to a bottom housing (103) of a motor (10); a motor shaft head portion (102) extends out of a housing (104) of the motor (10), and a motor shaft tail portion (101) extends out of the bottom housing (103) of the motor (10) and penetrates through the supporting assembly (1); the movable rotating disc (2) is mounted on the motor shaft tail portion (101); the motor shaft tail portion (101) drives the movable rotating disc (2) to rotate synchronously; the pressing assembly (4) is movably connected to the lower cover (5); the lower cover (5) and the supporting assembly (1) are connected and fixed by means of a first connecting member; the sliding block (6) is connected to the elastic member, the sliding block (6) is connected to the brake assembly (7), and the sliding block (6) and the elastic member are mounted in the upper cover (8); the upper cover (8) and the lower cover (5) are connected and fixed by means of a second connecting member. During braking, the brake assembly (7) can enable the sliding block (6) to move synchronously, the sliding block (6) drives the pressing assembly (4) to move towards the movable rotating disc (2), and the pressing assembly (4) can be in contact with and press the movable rotating disc (2), so that the movable rotating disc (2) stops rotating, the elastic member enables the sliding block (6) to reset after the brake is released, and the pressing assembly (4) does not press the movable rotating disc (2) any more.

An axle assembly for a vehicle comprising an axle housing and a brake assembly coupled to the axle housing. In certain embodiments, the axle housing is configured to receive an interchangeable brake assembly. The brake assembly may comprise a housing having a first chamber and a second chamber, a brake mechanism and a first piston disposed in the first chamber, and a second piston disposed in the second chamber. The first piston may be configured to selectively activate the brake mechanism. The second piston may be disposed in the second chamber adjacent a biasing mechanism having at least one pre-compressed biasing element, wherein the second piston may be configured to selectively activate the brake mechanism.

The present invention relates drum brake system, comprising a back plate assembly and a brake drum (1) that is rotatable with respect to the back plate assembly, the back plate assembly comprising: a back plate (2); two brake shoes (3, 3′), the two brake shoes (3, 3′) being pivotably connected to the back plate (2), pivot axes (4, 4′) of the brake shoes (3, 3′) being disposed at or near first ends of the brake shoes (3, 3′); an actuator housing (5) with two pistons (6, 6′), the two pistons (6, 6′) being configured to move outwardly, to press each piston (6, 6′) against one of the brake shoes (3, 3′) to pivot the respective brake shoe (3, 3′) outwardly about its pivot axis (4, 4′), and to press the respective brake shoe (3, 3′) against the brake drum (1) for braking; a return spring (7) extending between the brake shoes (3, 3′) and being connected to both brake shoes (3, 3′), the return spring (7) being configured (7) to exert a retracting spring force that pulls both brake shoes (3, 3′) away from the brake drum; two tension springs (8, 8′) and a holder arrangement (9), inner ends of each of the two tension springs (8, 8′) being connected to the holder arrangement (9), an outer end of the first tension spring (8) of the two tension springs (8, 8′) being connected to a first brake shoe (3) of the two brake shoes (3, 3′) and an outer end of the second tension spring (8′) of the two tension springs (8, 8′) being connected to a second brake shoe (3′) of the two brake shoes (3, 3′).

A disc brake assembly that includes at least one brake pad retraction spring and a sensor assembly. The brake pad retraction spring extends between a pair of brake pad assemblies. The sensor assembly includes at least one sensor and a wire harness. The sensor is disposed on a brake pad assembly. The wire harness is attached to the brake pad retraction spring.