The brake is a component used in the braking system to generate braking force that hinders the movement or movement of the vehicle. At present, the friction brakes widely used in various types of automobiles can be divided into two categories: drum type and disc type according to the different rotating elements.

The brake is a component used in the braking system to generate braking force that hinders the movement or movement of the vehicle. At present, the friction brakes widely used in various types of automobiles can be divided into two categories: drum type and disc type according to the different rotating elements.

The brake drum is the friction couple of the drum brake. In addition to the strength and rigidity required as a component, it should have as high and stable friction coefficient as possible, as well as appropriate wear resistance, heat resistance, and heat dissipation. And heat capacity. The basic shape of the brake drum is drum type, and there are connecting holes on the mounting surface.

A typical drum brake is mainly composed of a bottom plate, a brake drum, a brake shoe, a brake wheel cylinder (brake cylinder), a return spring, a positioning pin and other parts. The bottom plate is installed on the fixed position of the axle. It is fixed. It is equipped with brake shoes, wheel cylinders, return springs, and positioning pins to bear the rotating torque during braking. Each drum has a pair of brake shoes with friction linings on the shoes. The brake drum is installed on Lunyi and is a component that rotates with the wheel. It is made of cast iron of a certain weight and is shaped like a round drum.

The drum brake stops the tire from rotating. It uses hydraulic pressure from the master cylinder to the wheel cylinder to press down the brake shoe to the brake drum, which rotates with the tire. When the hydraulic pressure to the wheel cylinder disappears, the force of the return spring pushes the brake shoe away from the inner surface of the brake drum and returns to its original position.