Drum brake is also called block brake, which is achieved by pressing the brake pads on the brake wheels. Drum brake is an early design of the brake system. Its brake drum design has been used on horse-drawn carriages in 1902, and it was not widely used in the automobile industry until around 1920.
At present, the mainstream of drum brakes is the internal expansion type, and its brake pads (brake shoes) are located on the inner side of the brake wheel. When braking, the brake pads spread out and rub the inner side of the brake wheel to achieve the purpose of braking.
Drum brake advantages: self-brake effect. The drum brake has a good self-brake effect. Since the brakes are used to stretch the discs, the wheels rotate and the brake drums are twisted at an angle to brake to increase the tension of the discs (brake braking force), the more obvious the situation is. Therefore, generally large vehicles still use drum brakes.
