Brake (brake staff) can be divided into two categories, industrial brakes and car brakes car brakes are divided into traffic brakes (foot brake), parking brake (handbrake). In the process of driving, the general use of traffic brakes (foot brake), easy to move forward in the process of slow down, not only to keep the car does not move. If the driving brake failure when the use of parking brake. When the car stops, it is necessary to use parking brake (handbrake), to prevent the vehicle before the slide and after the slip. After the parking brake in addition to the general use of parking brake, the uphill to stalls stalls in a file (to prevent after the slip), downhill to stalls in the gear (to prevent the front slide).

    The resistance torque that must be applied to stop or decelerate the mechanical running parts is called the braking torque. Braking torque is the basis for the design and selection of the brake, the size of which is determined by the type and work requirements of the machine. The performance of the friction material (brake) used on the brake directly affects the braking process, and the main factors affecting its performance are the working temperature and the temperature rise rate. Friction materials should have high and stable friction coefficient and good wear resistance. Friction materials are metal and nonmetallic. The former commonly used cast iron, steel, bronze and powder metallurgy friction materials, the latter are leather, rubber, wood and asbestos.

• YWZ9 series of electric hydrau
• DCPZ12.7 series of electromagn