Disc brake has hydraulic type, hydraulic control, the main parts are brake disc, sub pump, brake clamp, oil pipe and so on. The brake disc is made of alloy steel and fixed on the wheel and rotates with the wheel. The pump is fixed on the brake plate is fixed on both sides of the two brake caliper are respectively arranged in the brake disc, piston pump by hydraulic tubing to transport, push the friction plate to press the brake disc friction brake, act like tongs clamped in the rotation plate. Forcing it to stop. Disc brakes are quick in heat dissipation, light in weight, simple in construction and easy to adjust. Many cars have disc brake, including flat brake disc, perforated brake disc and scribing brake disc, among them, the braking effect and ventilation and heat dissipation ability of the scribing brake disc are all good.

Disc brake is driven along the brake disc, the brake shaft is not bending, the radial size is small, and the braking performance is stable.

The rotating element in the friction pair of the disc brake is a metal disk working on the end of the disc, which is called the brake disc. The fixed element has a variety of structural types, which can be divided into two types in general. One is a brake block consisting of a friction block with a small working area and its metal back plate. There are 2~4 of each brake. These brake blocks and their actuating devices are installed in a clamp - shaped bracket across the brake disc, which is generally called a brake clamp. The brake, consisting of a brake disc and a brake clamp, is called a clamp disc brake. The metal back plates and friction discs of another kind of fixed elements are also disc shaped, and all the working faces of the brake discs can be contacted with the friction discs at the same time. The brake is called the full disc brake. The clamp disc brake used to be used as a central brake in the past, but more and more cars and trucks at all levels were used as wheel brakes. There are only a few cars (mainly heavy cars) used as wheel brakes for full disc brakes. Here is only a clamp disc brake. The clamp disc brakes can be divided into two types, which are the clamp plate type and the floating clamp disc type.

Fixed pliers disc

Fixed - clamp disc brakes. The brake clamp body 5 which is spanned on the brake disc 1 is fixed on the axle 6, and it can not rotate or move along the axis of the brake disc, and the two piston 2 in the brake disc 1 is located on both sides of the brake disc 1. When braking, the brake fluid is injected into the two interconnected hydraulic cavities by the brake master cylinder (brake master cylinder) through the oil inlet 4, and the brake block 3 on both sides is pressed to the brake disc 1 which is fixedly connected to the wheel, thus braking is generated.

This has the following disadvantages: brake cylinder brake caliper to more complex structure; on both sides of the plate brake cylinder, the brake disc must be used across the oil channel inside or outside clamp tubing connected to the brake caliper, the size is too large, difficult to install in the inner rim of modern cars; heat load, brake fluid the tubing or oil cylinder and the brake disc in the span to vaporize easily; and for the parking brake, you must install a mechanical parking brake caliper dynamic pro.

Floating clamp disc

The floating clamp disc brake and the brake clamp body 2 are connected to the car bridge 7 through the guide pin 6, and can be moved axially relative to the brake disc 1. The brake pliers only set the oil cylinder on the inside of the brake disc, while the outer brake blocks are attached to the clamp body. When braking, hydraulic oil through the oil inlet 5 into the brake cylinder, push the piston 4 and the friction block moves to the right, and the pressure on the brake disc, and the cylinder together with the brake caliper body along the pin to move to the left, until the brake disc friction block on the right side of the pressure on the brake disc and the brake disc clamp brake. Contrary to the clamper disc brake, the axial and radial dimensions of the floating clamp disc brake are smaller, and the chance of the brake fluid to be heated vaporized is less. Besides, under the condition of concurrent driving and parking brake, the floating caliper disc brake only needs to install some mechanical transmission parts to drive the oil cylinder piston in the vicinity of the brake caliper cylinder. Since 70s, the floating clamp disc brake has gradually replaced the clamper disc brake.