Basic Structure of General Brake System

¡¤ It is mainly composed of wheel brake, hydraulic transmission and pneumatic transmission mechanism.

¡¤ Wheel brake mainly consists of rotating part, fixed part and adjusting mechanism, rotating part is brake drum; fixed part includes brake shoe and brake bottom plate; adjusting mechanism consists of eccentric supporting pin and adjusting cam to adjust the gap between hoof drum and brake shoe.

¡¤ Hydraulic brake transmission mechanism is mainly composed of brake pedal, push rod, main brake cylinder, brake wheel cylinder and pipeline.

¡¤ Pneumatic brake transmission mechanism is mainly composed of brake pedal, push rod, brake main valve, air dryer, four-loop protection valve, brake chamber and pipeline.

Working Principle of Braking

The general working principle of the braking system is to prevent the wheel from turning or turning by using the friction between the non-rotating elements connected with the body (or frame) and the rotating elements connected with the wheel (or transmission shaft).

1) Brake system not working

¡¤ There is a gap between hoof and drum. Wheels and brake drums can rotate freely.

2) Braking time

¡¤ In order to decelerate the car, the pedal of the foot brake pedal passes through the push rod and the main cylinder, so that the oil of the main cylinder flows into the cylinder under a certain pressure, and the brake shoe rotates around the supporting pin through the piston of the two cylinders. The upper end is separated from the two sides and is pressed on the inner surface of the brake drum with its friction plate. The non-rotating brake shoe generates friction moment to the rotating brake drum, which generates braking force.

3) Unbraking

¡¤ When the brake pedal is released, the brake shoe will be pulled back to its original position and the braking force will disappear.