A drum brake assembly includes a brake spider having a central aperture configured to receive an axle extending therethrough and first and second brake shoes. Each of the first and second brakes shoes has a first end pivotally coupled to the brake spider. First and second cam followers are disposed at corresponding second ends of the first and second brake shoes. A camshaft has a shaft extending through a camshaft aperture in the brake spider and disposed along a rotational axis and a cam disposed at a first end of the shaft and in engagement with the first and second cam followers. An electric motor has an output shaft coupled to the camshaft. A controller is configured to drive the electric motor to cause rotation of the camshaft and move the first and second brake shoes between positions of engagement and disengagement with an associated braking surface.

A drum brake assembly includes a brake spider having a central aperture configured to receive an axle extending therethrough and first and second brake shoes. Each of the first and second brakes shoes has a first end pivotally coupled to the brake spider. First and second cam followers are disposed at corresponding second ends of the first and second brake shoes. A camshaft has a shaft extending through a camshaft aperture in the brake spider and disposed along a rotational axis and a cam disposed at a first end of the shaft and in engagement with the first and second cam followers. An electric motor has an output shaft coupled to the camshaft. A controller is configured to drive the electric motor to cause rotation of the camshaft and move the first and second brake shoes between positions of engagement and disengagement with an associated braking surface.

An electric drum brake comprises a back plate. Shoes are operatively mounted to the backplate and displaceable to a deployed condition against a wheel drum from a retracted condition. An electrically powered actuation mechanism is adapted to convert electric power to a movement of the shoes to the deployed condition. A safety actuation mechanism comprises a lever having a first end adapted to receive a mechanical force. A joint configuration connects the lever to at least one of the shoes to convert movements of the lever to movements of at least one of the shoes between the deployed condition and the retracted condition without said electric power. A biasing member produces a biasing action against at least one of the lever and the joint configuration to maintain the shoes in the deployed condition, the mechanical force being against the biasing action to maintain the shoes in the retracted condition.

An electric drum brake comprises a back plate. Shoes are operatively mounted to the backplate and displaceable to a deployed condition against a wheel drum from a retracted condition. An electrically powered actuation mechanism is adapted to convert electric power to a movement of the shoes to the deployed condition. A safety actuation mechanism comprises a lever having a first end adapted to receive a mechanical force. A joint configuration connects the lever to at least one of the shoes to convert movements of the lever to movements of at least one of the shoes between the deployed condition and the retracted condition without said electric power. A biasing member produces a biasing action against at least one of the lever and the joint configuration to maintain the shoes in the deployed condition, the mechanical force being against the biasing action to maintain the shoes in the retracted condition.

A brake device for a vehicle may include: a driving unit positioned in a drum and supplying rotation power; a nut screw positioned between first and second brake shoes; a first push rod having both sides connected to the first brake shoe and the nut screw, and pressurizing the first brake shoe through the rotation of the nut screw; a fixing protrusion fixed to a case surrounding the nut screw; a rotation connection part coupled to the fixing protrusion to restrict rotation of the rotation connection part; a rotation control part inserted into the rotation connection part so as to be screwed to the rotation connection part; and a second push rod having both sides connected to the second brake shoe and the rotation control part, and moved together with the rotation control part in a longitudinal direction so as to pressurize the second brake shoe.

A brake device for a vehicle may include: a driving unit positioned in a drum and supplying rotation power; a nut screw positioned between first and second brake shoes; a first push rod having both sides connected to the first brake shoe and the nut screw, and pressurizing the first brake shoe through the rotation of the nut screw; a fixing protrusion fixed to a case surrounding the nut screw; a rotation connection part coupled to the fixing protrusion to restrict rotation of the rotation connection part; a rotation control part inserted into the rotation connection part so as to be screwed to the rotation connection part; and a second push rod having both sides connected to the second brake shoe and the rotation control part, and moved together with the rotation control part in a longitudinal direction so as to pressurize the second brake shoe.

Brake shoe, in particular of a drum brake for utility vehicles, includes a lining plate and a bridge unit, wherein the bridge unit is formed as a one-piece body comprising at least two bridge plates.

Brake shoe, in particular of a drum brake for utility vehicles, includes a lining plate and a bridge unit, wherein the bridge unit is formed as a one-piece body comprising at least two bridge plates.

Disclosed is an electronic parking brake apparatus. The electronic parking brake apparatus includes: a power generating unit which generates power based on an external signal; a braking force transmission unit which is coupled to the power generating unit in a threaded connection manner, rectilinearly moves by the power, and transmits braking force generated by the rectilinear movement; a braking force supplementing unit which is disposed to be adjacent to the power generating unit while surrounding the braking force transmission unit in order to prevent the braking force from being decreased; and a brake body part which is connected with the braking force transmission unit and parks a vehicle by using the braking force.

Disclosed is an electronic parking brake apparatus. The electronic parking brake apparatus includes: a power generating unit which generates power based on an external signal; a braking force transmission unit which is coupled to the power generating unit in a threaded connection manner, rectilinearly moves by the power, and transmits braking force generated by the rectilinear movement; a braking force supplementing unit which is disposed to be adjacent to the power generating unit while surrounding the braking force transmission unit in order to prevent the braking force from being decreased; and a brake body part which is connected with the braking force transmission unit and parks a vehicle by using the braking force.