In the caliper disc brake, the brake block is composed of a small friction block and its metal backplane. There are 2~4 blocks in each brake. These brake blocks and their actuating devices are all mounted in the clamps bracket across the brake discs, called brake calipers. Due to its strong heat dissipation and good thermal stability, the Jiu he run clamp disc brake is widely used in most cars and light goods vehicles.

According to the structure of brake calipers, the caliper disc brake can be divided into two types: the fixed caliper disc and the floating caliper disc.

1. fixed clamp disc brake

The brake disc is fixed on the wheel hub, and the brake caliper is fixed on the axle, which neither rotates nor moves along the axial direction of the brake disc. The brake caliper is equipped with two brake wheel cylinder pistons, which respectively press the brake blocks on both sides of the brake disc. When the driver has stepped down the brake pedal to make the car brake, the brake fluid from the main brake cylinder is pressed into the cylinder of the brake wheel, the hydraulic pressure of the brake cylinder rises, the two wheel cylinder piston moves to the brake disc under the hydraulic action, and the brake block is pressed against the brake disc, the brake block is clamped to the brake disc, and the friction moment that prevents the wheel from turning is realized. Brake.

2. floating clamp disc brake

The floating caliper disc brake caliper is floating and can move axially relative to the brake disc. The brake caliper is generally designed to move axially relative to the brake disc. The inner side of the brake disc is provided with a hydraulic cylinder, and the outer fixed brake block is attached to the clamp body. When braking, the brake fluid is pressed into the cylinder, and the piston moves to the left under the hydraulic action, pushing the active brake block to move to the left and pressing on the brake disc, so the brake disc gives the piston a right counterforce, so that the piston, along with the brake clamp body, moves along the guide pin to the right until the fixed brake block on the left side of the brake disc. It is also pressed on the brake disc. At the same time, both sides of the brake block are pressed on the brake disc, and the brake block clamps the brake disc to produce friction torque preventing wheel rotation and realizes braking.