The release brake hub is an important component of the braking system of a Jiefang vehicle. It is usually installed on the wheel and works in conjunction with the brake pads. During braking, the brake pads expand outward and closely adhere to the inner wall of the brake hub, relying on friction to slow down or stop the vehicle. The material is mostly high-strength cast iron, which has good wear resistance and thermal stability, and can withstand the high temperatures and frictional forces generated during braking. Its size and specifications are adapted to the vehicle, having a significant impact on braking performance and directly affecting driving safety.