A braking apparatus may include: a torque plate unit; a piston unit coupled to a shoe liner and configured to be movable inside the torque plate unit; and a dust boot including a boot body enclosing the piston unit and installed between the torque plate unit and the piston unit, and a shape retainer having an annular shape and inserted into one end of the boot body.

A drum brake assembly for a vehicle includes a brake drum. First and second brake shoes are displaceable between a rest condition in which the first and second brake shoes are spaced from the brake drum and a braking condition in which the first and second brake shoes engage the brake drum. A first spring applies a force between the first brake shoe and a fixed component of the vehicle. A second spring applies a force between the second brake shoe and the fixed component of the vehicle. The first and second springs biasing the first and second brake shoes to the rest condition.

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 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.

A braking apparatus may include: a torque plate unit; a piston unit coupled to a shoe liner and configured to be movable inside the torque plate unit; and a dust boot including a boot body enclosing the piston unit and installed between the torque plate unit and the piston unit, and a shape retainer having an annular shape and inserted into one end of the boot body.

A drum brake dust shield is provided for a vehicle braking system having a drum brake assembly. The dust shield comprises a first semicircular portion lying in a generally flat plane, and a second semicircular portion lying in the same plane as the first portion to form an annular disc. A dividing slit is defined between the first and second portions. The dust shield further comprises a hinge portion interconnecting the first and second portions. The hinge portion has a stress-relief slit that transversely intersects the dividing slit such that mechanical stresses between the first and second portions are distributed and dispersed over a relatively larger surface area when the first and second portions are spread apart along the dividing slit in opposite directions relative to each other to install the dust shield on the drum brake assembly.

A drum brake dust shield is provided for a vehicle braking system having a drum brake assembly. The dust shield comprises a first semicircular portion lying in a generally flat plane, and a second semicircular portion lying in the same plane as the first portion to form an annular disc. A dividing slit is defined between the first and second portions. The dust shield further comprises a hinge portion interconnecting the first and second portions. The hinge portion has a stress-relief slit that transversely intersects the dividing slit such that mechanical stresses between the first and second portions are distributed and dispersed over a relatively larger surface area when the first and second portions are spread apart along the dividing slit in opposite directions relative to each other to install the dust shield on the drum brake assembly.

Disclosed herein an electric parking brake. The electric parking brake according to an embodiment of the disclosure includes a power transmission unit that receives a rotational force from an actuator that generates a driving force for implementing a parking braking force and converts the rotational force into a linear motion to press or release a pair of brake shoes disposed on both sides of an inside of a drum, respectively, wherein the power transmission unit includes a pressing piston configured to press the pair of brake shoes, a driving cylinder configured to guide the pressing piston, and a dust cover installed between the pressing piston and the driving cylinder, the dust cove formed to be deformable according to an operation of the pressing piston, wherein the dust cover is configured to maintain internal airtightness of the power transmission unit and prevent foreign substances from entering.

A drum brake assembly for a vehicle includes a brake drum. First and second brake shoes are displaceable between a rest condition in which the first and second brake shoes are spaced from the brake drum and a braking condition in which the first and second brake shoes engage the brake drum. A first spring applies a force between the first brake shoe and a fixed component of the vehicle. A second spring applies a force between the second brake shoe and the fixed component of the vehicle. The first and second springs biasing the first and second brake shoes to the rest condition.

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.