New energy vehicle favorite-what is the difference between drum brake disc brake VS drum brake?

Disc brakes and drum brakes are two common types of automobile brake systems, and in new energy vehicles, drum brake systems are more common. There are some obvious differences between disc brakes and drum brakes.

1. Structure and Appearance

The disc brake system consists of brake discs, brake pads, brake calipers and brake master cylinder. The brake disc is a disc-shaped metal part. The brake pads are clamped on both sides of the disc. When the brake pedal is stepped on, the brake pads will rub against the brake disc to produce a braking effect. The disc brake system is usually located at the wheel hub of the vehicle and has an eye-catching appearance.

The drum brake system consists of a brake drum, brake shoes, brake cylinder and booster. The brake drum is a cylindrical metal part. The brake shoes are installed inside the drum. When the brake pedal is stepped on, the brake shoes will rub against the drum to produce a braking effect. The drum brake system is usually located inside the wheels of the vehicle and has a relatively hidden appearance.

2. Braking effect

The disc brake system has a more significant braking effect due to the design of the brake disc and brake pads. The heat dissipation performance of the brake disc is better, and it is not easy to cause brake attenuation. The contact area between the brake pad and the brake disc is large, and the friction during braking is stronger. Therefore, the disc brake system is more stable and sensitive when braking.

Due to the structure of the brake drum, the drum brake system has poor heat dissipation performance and is prone to brake attenuation. The shape of the brake drum is relatively closed, the contact area between the brake shoe and the brake drum is relatively small, and the friction force during braking is relatively weak. Therefore, the drum brake system is relatively unstable and sensitive when braking.

3. Heat dissipation performance

The disc brake system has better heat dissipation performance. Due to the design of the heat dissipation fins of the brake disc, the heat generated during braking can be dissipated more quickly. This can effectively prevent the occurrence of brake attenuation and improve the stability of braking. However, after long-term high-temperature braking, the brake disc may be deformed.

The heat dissipation performance of the drum brake system is poor, and the heat dissipation is relatively slow due to the closed structure of the brake drum. Brake attenuation is prone to occur during high-speed and long-term braking, which reduces the braking effect. However, the drum brake system is relatively safe, because the drum brake system has a better braking effect under wet conditions, and water can be quickly discharged from the brake drum to improve braking performance.

4. Repair and replacement

The repair and replacement of the disc brake system is relatively convenient. The structure of the brake disc and brake pad is simple, easy to remove and replace. At the same time, because it is exposed outside the hub, inspection and maintenance are relatively easy.

Drum brake system repair and replacement is more complex. Since the drum brake system is located inside the wheel hub, the wheel and other related parts need to be disassembled for inspection and maintenance. At the same time, the structure of the drum brake is complex, and the replacement is relatively troublesome.

In summary, the disc brake system has better braking effect and better heat dissipation performance, and is suitable for high-performance and high-speed driving vehicles. The drum brake system is relatively safe, and the braking effect is better under wet conditions. It is suitable for ordinary cars and new energy vehicles. However, with the development of technology, disc brake technology has also been improved and applied in new energy vehicles, and the drum brake system is constantly improving to improve the braking effect.