The braking system of a car is one of the key components to ensure driving safety, and the most important one is the brake pads. Brake pads are divided into disc brake pads and drum brake pads, which have different structures and working principles.

The structure of disc brake pads and drum brake pads is different. The interaction between disc brake pads and brake discs is similar in structure to wheels, consisting of substrate, friction material, and adhesive. The drum brake pad interacts with the brake drum, and its structure is similar to a bucket, consisting of drum brake shoes, springs, and adjusters.

The working principles of disc brake pads and drum brake pads are also different. Disc brake pads generate braking force through friction with the brake disc. The braking process is relatively direct and simple, and the braking effect is more obvious. They are suitable for high-speed vehicles. The drum brake pad generates braking force through friction with the brake drum, and its braking process is relatively indirect and complex. The braking effect is relatively soft, suitable for vehicles driving at low speeds.