A drum brake of a vehicle according to a present embodiment may include a pair of brake shoes disposed in a drum to be moved to an inner circumferential surface of a brake drum of the drum brake by a wheel cylinder, a backplate which is fixed to a vehicle body and to which each of the brake shoes is rotatably coupled, and a rotation unit configured to assist a restoring force of the brake shoe, wherein the rotation unit includes a moving pin fixed to a side surface of the brake shoe and formed to protrude toward the backplate, a rotation plate to which the moving pin is coupled to receive an external force in a moving direction of the moving pin, and an elastic part disposed between the rotation plate and the backplate to elastically support the rotation plate.

A drum brake apparatus may include: a housing; a main braking part installed at one side of the housing, and driven by hydraulic pressure to pressurize shoes during main braking; and a parking braking part installed at the other side of the housing, and driven by an electromotive force to pressurize the shoes during parking braking.

A method for operating a brake system for a motor vehicle, wherein the brake system has a braking pressure source and at least one wheel brake which can be pressurized with a braking pressure which is provided by means of the braking pressure source and acting on a brake piston. For performing a diagnosis of the brake system, the wheel brake is pressurized with a braking pressure which corresponds to a diagnosis braking pressure and which applies a certain force on the brake piston, and a counterforce directed oppositely to said force is applied to the brake piston.

A drum brake assembly includes a brake drum, a brake shoe and lining assembly operably displaceable to contact the brake drum, and an electric actuator assembly. The electric actuator assembly has an electric motor with an output shaft, a gear reduction driven by the output shaft, a linear translation assembly having a gear nut driven by the gear reduction, and a connection portion of the linear translation assembly. The output shaft drives the gear reduction through a suitable gear type that can convert a rotation torque of the output shaft to the gear reduction at a right angle. The linear translation assembly linearly translates when the gear nut is driven. As a result of the linear translation, the connection portion actuates the brake shoe and lining assembly to contact the brake drum.

A drum brake according to an embodiment of the present disclosures, which is a drum brake including a drum configured to rotate together with wheels, and a first brake shoe and a second brake shoe to which linings that rub against an inner circumferential surface of the drum are attached, includes: a first pivot fixing part configured to fix one end of the first brake shoe in a pivoting manner so that the first brake shoe outwardly operates and thus the lining of the first brake shoe rubs against the inner circumferential surface of the drum when the first brake shoe pivots in one direction with respect to the one end of the first brake shoe; and a second pivot fixing part configured to fix one end of the second brake shoe in the pivoting manner so that the second brake shoe operates outwardly and thus the lining of the second brake shoe rubs against the inner circumferential surface of the drum when the second brake shoe pivots in the other direction with respect to the one end of the second brake shoe.

A drum brake for a motor vehicle has a pocket for collecting abraded brake particles. The pocket is accessible from above via an opening. After the introduction of a suction device into the opening, the abraded brake particles can be extracted by suction. Pollution of the environment with abraded brake particles is thereby avoided.

A drum brake with a carrier, a deformation sensor, and at least one brake shoe. The carrier is connected to a supporting bearing for the at least one brake shoe. The deformation sensor is designed to determine a deformation of the carrier. A brake system includes at least one such drum brake, and a vehicle with such a brake system or with at least one such drum brake.

An electric parking brake actuator mounting assembly includes a brake backplate of a drum brake, having a rear surface opposite to a front surface configured to be facing a brake drum when the brake backplate is mounted on a motor vehicle, wherein the rear surface of the brake backplate includes a support base configured to receive a pull spindle of an electromechanical actuator, a supporting bracket including at least one coupling plate, configured to be attached to the rear surface of the brake backplate, and an actuator mounting surface configured to be coupled to and support the electromechanical actuator, wherein the actuator mounting surface includes a spindle seat, configured to receive the pull spindle of the electromechanical actuator, and a pin lock seat, configured to receive and lock an engagement pin of the electromechanical actuator.

A knuckle for a heavy-duty vehicle self-steering axle/suspension system that includes integrally formed structure for mounting components of a drum brake system. The knuckle includes a spindle that is welded directly to the knuckle and a discrete tie rod arm bolted to the knuckle.

A drum brake apparatus includes a housing; a main braking unit installed on one part of the housing, and driven by a hydraulic pressure and pressing a shoe, during main braking; and a parking braking unit installed on the other part of the housing, and driven by an electromotive force of an actuator and pressing the shoe, during parking braking, the parking braking unit includes a bevel gear section disposed in the housing while having a structure of a bevel gear, and rotated in association with the actuator; and a rod section connected with the bevel gear section, and moved out of the housing in association with the bevel gear section and pressing the shoe.