【正文】
rque generated in different ways, the brakes can be divided into: friction brake and retarder brakes, brake, broadly speaking, usually referred to the friction brake. At present all kinds of cars used by the brake drum brakes and can be divided into two major categories of disc brakes. Drum brake friction in the rotating ponents of the brake drum, and its work surface for the cylindrical surface of the rotating disc brake ponents for the brake disc, to end the work surface. In addition, under the rotating ponents of the installation of different positions, the brakes can be divided into the wheel brakes and brake two categories. Among them, the rotating wheels, brake ponents installed in the solidwheel or axle, brake torque that is a direct role in both sides of the whe