A drum brake assembly that includes a brake drum, first and second brake shoes, a cam shaft, a first tappet, a second tappet, and a wear adjuster mechanism. The wear adjuster mechanism has a cross shaft and a sensor. The sensor is configured to detect rotation of the cross shaft about a longitudinal axis to monitor wear of the first and second brake shoes and a braking surface of the brake drum.

An electric parking brake device for a vehicle, including: a drum brake arranged on a radially inner side of a rim portion; and an electric actuator which enables obtaining a parking brake state by driving the drum brake, the electric actuator being mounted to a side surface of a back plate on an inner side in a vehicle-width direction. An ice and snow accumulation suppressing member (54) including a wall portion (54a), which extends from the back plate to the inner side in the vehicle-width direction while facing an inner peripheral surface of the rim portion (40b) and which is arranged at least below an anchor portion (21), is mounted to an outer peripheral edge portion of the back plate (13). With this configuration, collision of ice and snow refrozen in a wheel with the electric actuator can be prevented.

An expanding device for actuating one of the brake shoes of a drum brake includes a body of revolution and transmission bodies actuated by the body of revolution via ball track ramps. A spacer body is located between two partial bodies of the body of revolution, the spacer body guided by an adjustment spring keeping the partial bodies at the respectively reached distance. The spacer body is screwed onto a pin on the first partial body. A readjustment nut ensures that, when the two partial bodies are pushed apart, the spacer body rotates on the pin and moves away from a supporting surface on a partition of the second partial body. Upon renewed actuation of the brakes, the readjustment nut is guided such that the spacer body bears against the second partial body), but takes up a different position on the pin, the position corresponding to the air clearance readjustment.

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.

The present disclosure relates to an electric brake system for an electric vehicle, which is more economical by simplifying a configuration of an electric vehicle that includes a main service brake and an electromagnetic brake, the electric brake system including an inductor, in a spherical shape, formed so that a drive axle penetrates through a center portion of the inductor; a plurality of springs inserted into holes defined in the inductor; an armature, in a disk shape, provided to contact the spring; and a friction disk mounted on a side of a motor, where a braking force is generated by operating the friction disk toward the armature.

An electronic parking brake device may include: a gear unit driven by an actuator; a rotating rod connected to the gear unit; a push rod unit configured to pressurize one or more shoes while moved in connection with the rotating rod; a clutch unit disposed to interfere with a moving line of the gear unit, and configured to apply a rotational load to the gear unit while abutting on the gear unit, when the gear unit is rotated at a present angle; and a controller configured to control the operation of the actuator according to the load applied to the actuator.

A brake device for a vehicle, including: a rotary body; a friction member; an actuator including a piston and an electric motor; a piston-retracting prohibiting mechanism including a toothed wheel having ratchet teeth, a stopper configured to lock the ratchet teeth, a stopper biasing mechanism configured to bias the stopper in a direction in which the stopper moves from a locking position to a non-locking position, and a stopper keeping device configured to keep the stopper positioned at the locking position by an electric current supplied thereto, the prohibiting mechanism being configured to prohibit the piston from being retracted in a state in which the stopper locks the ratchet teeth; and a controller configured to control supply of an electric current to the electric motor and supply of the electric current to the stopper keeping device, wherein an electricity storage device is provided in parallel with the stopper keeping device.

A vehicle drum brake including: a pair of brake shoes arranged to be expanded on a backing plate; a first parking lever disposed to rotate around a predetermined mounting shaft positioned at one end portion of one of the brake shoes; a second parking lever made up of a member different from the first parking lever, disposed to rotate around the mounting shaft, and coupled to and rotated together with the first parking lever; and a strut including a first strut member engaged with the first and second parking levers, the first and second parking levers are coupled to each other by a coupling pin so as to be engaged with the first strut member at the same time.

The present disclosure relates to an electric brake system for an electric vehicle, which is more economical by simplifying a configuration of an electric vehicle that includes a main service brake and an electromagnetic brake, the electric brake system including an inductor, in a spherical shape, formed so that a drive axle penetrates through a center portion of the inductor; a plurality of springs inserted into holes defined in the inductor; an armature, in a disk shape, provided to contact the spring; and a friction disk mounted on a side of a motor, where a braking force is generated by operating the friction disk toward the armature.

An electronic parking brake device may include: a gear unit driven by an actuator; a rotating rod connected to the gear unit; a push rod unit configured to pressurize one or more shoes while moved in connection with the rotating rod; a clutch unit disposed to interfere with a moving line of the gear unit, and configured to apply a rotational load to the gear unit while abutting on the gear unit, when the gear unit is rotated at a present angle; and a controller configured to control the operation of the actuator according to the load applied to the actuator.