What is the structure of a drum brake?
1 Answers
A typical drum brake mainly consists of components such as the backing plate, brake drum, brake shoes, wheel cylinder (brake slave cylinder), return springs, and locating pins. The backing plate is fixed to the axle and remains stationary, equipped with brake shoes, wheel cylinders, return springs, and locating pins, bearing the rotational torque during braking. More details are as follows: 1. Each drum has a pair of brake shoes, which are fitted with friction linings. The brake drum is mounted on the wheel hub and rotates with the wheel. It is made of cast iron with a certain weight and has a drum-like shape. 2. The drum brake uses the brake actuation mechanism to press the brake shoes against the inner side of the brake drum, thereby generating braking force. This allows the wheel to decelerate as needed or stop within the shortest distance, ensuring driving safety and reliable parking without automatic slipping.