An electric drum brake for a rotatable element of a passenger motor vehicle. The drum brake has a brake drum and a brake surface which is connected rotationally conjointly to the brake drum, and also an electromagnet arrangement, wherein multiple brake shoes can be pushed against the brake drum by the electromagnet arrangement, and wherein the drum brake has a preloading arrangement which preloads the electromagnet arrangement into a position spaced apart from the brake surface.

A parking mechanism that includes a wheel disc, a wedge disc, and a drive assembly. An axis of the wheel disc and an axis of the wedge disc both are aligned with an axis of a motor shaft. A wedge groove with an opening facing the wheel disc is formed on a surface of the wedge disc facing the wheel disc, and a movable part in contact with the wheel disc is disposed in the wedge groove. In a direction from a bottom of the wedge groove to the wheel disc, a groove depth at a first end of the wedge groove is greater than a size of the movable part, and a groove depth at a second end of the wedge groove is less than the size of the movable part. The parking mechanism can provide stepless variable parking force.

An example rotational joint assembly for a robotic medical system, the rotational joint assembly comprising at least one arm segment and a rotational joint provided at one end of the arm segment. The rotational joint is to allow the arm segment to rotate about a rotational axis. The rotational joint comprising a brake to lock rotation of the arm segment at the rotational joint and an actuator to selectively engage or disengage the brake. The actuator comprising a cam having two stable regions separated by two transition regions, the two stable regions comprising a first stable region corresponding to engagement of the brake and a second stable region corresponding to disengagement of the brake.

Provided is a disc brake including: a piston, which has a bottomed cylindrical shape, and is configured to press inner and outer brake pads against a disc rotor; a nut member (thrust member) configured to thrust the piston through rotation of a spindle driven by an electric motor; a rotation stopping member configured to restrict rotation of the nut member relative to the piston; a flat surface portion, which is formed on an inner side of the piston, and is configured to restrict rotation of the rotation stopping member and stop the rotation stopping member through engagement; and a fixing member configured to restrict movement of the rotation stopping member in an axial direction relative to the piston. This configuration allows easy manufacture of the nut member.

A brake actuator for an aircraft braking system, comprising a housing, a sleeve, an annular member mounted to the housing extending radially inwardly for engagement with the ratchet teeth of the sleeve, a piston slidable along an axis (X), a piston head disposed at a first end of the pin portion, a cap disposed at a second end of the pin portion for operative engagement with a brake element of the housing, and a second position in which the piston head is drivingly disengaged from the sleeve.

Disclosed herein a caliper brake includes a brake disc rotating with a wheel of a vehicle; an inner brake pad and an outer brake pad respectively disposed on opposite sides of the brake disc; a pressing member configured to press the inner brake pad against the brake disc; a caliper housing in which the pressing member is movable forward and backward; a caliper bridge connected to the caliper housing and configured to press the outer brake pad against the brake disc by a reaction force in response to operation of the pressing member; a carrier fixed to a body of the vehicle; and at least one guide rod fixed to the carrier and guiding sliding movement of the caliper housing and the caliper bridge with respect to the carrier.

The disclosure relates to the technical field of vehicle accessories, and particularly provides a brake for a vehicle and a vehicle. The disclosure aims at solving the problem that existing brakes for a vehicle usually cannot overcome low-frequency stubborn noise generated by a caliper structure in the brake in a braking process. For this purpose, the brake for a vehicle according to the disclosure comprises a first caliper body and a second caliper body, wherein the first caliper body and the second caliper body are provided with a first friction disc and a second friction disc respectively, a brake disc is arranged between the first friction disc and the second friction disc, and the first friction disc and the second friction disc are each further provided with at least one mass block, so as to quickly reduce low-frequency operating noise of the brake, thereby fundamentally eliminating braking noise, and then solving the problem that the existing brakes for a vehicle usually cannot overcome low-frequency stubborn noise generated by a caliper structure in the brake in a braking process.

An electro-hydraulic actuator includes: a motor output rotative power; an external gear pump activated by the motor; a hydraulic actuator operated by a pressurized working fluid supplied by the external gear pump; a manifold block in which a flow channel forming a working fluid circuit of the hydraulic actuator is incorporated; a first portion to store the motor; a second portion to store the external gear pump, the hydraulic actuator, and a reservoir; and a coupling portion to couple the first portion and the second portion in a liquid-tight state. The coupling portion includes a communication hole through which the first portion and the second portion communicate, a rotational shaft of the motor and a driving shaft of the external gear pump are joined to each other, and the external gear pump is attached to the coupling portion while being stored in the manifold block.

A brake assembly comprises: a brake piston configured to be movable for a brake apply or release and having an inner wall forming a piston cavity, wherein a groove is formed on the inner wall of the brake piston; a linearly movable structure positioned within the piston cavity of the brake piston and configured to be linearly movable within the piston cavity; and a resilient material, wherein a part of the resilient material is located within the groove formed on the inner wall of the brake piston and the other part of the resilient material is disposed on an outer surface of the linearly movable structure so that the resilient material is engageable with a surface of the groove formed on the inner wall of the brake piston to move the brake piston by restoring force of the resilient material in response to linear movement of the linearly movable structure.

A disc brake (1) includes a brake disc (2), a brake caliper (3), two brake pads (4, 4′) that are movably guided on the brake caliper (3), a retainer spring (6, 6′) on each brake pad (4, 4′), a retainer bracket (8-8.sup.IV) for pre-tensioning the retainer springs (6, 6′) in relation to the respective brake pad (4, 4′), and an expander spring (10, 10′) that applies an expansion force between the brake pads (4, 4′) and diverging the brake pads (4, 4′). The ends of the expander spring (10, 10′) may bear in each case directly on one of the retainer springs (6, 6′). The disc brake (1) may have a loss prevention device that is operatively connected to the expander spring (10, 10′) such that the expander spring (10, 10′), in the absence of the expansion force, is held on the disc brake (1).