Differences between bus drum brake pads and disc brake pads

Bus drum brake pads and disc brake pads are two main forms. Drum brake pads are installed inside the brake drum. During braking, the inner wall of the brake drum generates braking force through friction. Its advantages are strong braking force, large contact area of the friction surface, and low cost. The main disadvantage of drum brakes is that the sealed structure leads to poor heat dissipation performance. The heat generated during frequent braking is difficult to dissipate, resulting in a decline in braking efficiency and even brake failure. This is an obvious problem for buses that need to brake frequently or carry heavy loads. Disc brake pads work in conjunction with the brake disc, and the brake caliper clamps the brake disc to generate braking force. The advantage of disc brakes is the open structure for rapid heat dissipation, which can maintain stable performance even during continuous or high-intensity braking. In addition, disc brakes have strong braking force output, fast response, and can quickly restore the braking force to its original state even after getting wet. It is also very convenient to replace the brake pads. Although the cost of disc brakes is high, due to their safety, reliability, and maintenance, they have become the mainstream configuration for buses.