The function of the air brake chamber is to convert the pressure of the compressed air into the mechanical force that makes the brake camshaft rotate to realize the braking action. The air brake chamber is a clamp clamp diaphragm type. The front and rear brake chambers are different in size, but their structure is basically the same.
Features
When the car is braking, air enters the brake chamber from the air inlet, deforms the diaphragm under the action of air pressure, pushes the push rod, and drives the brake adjustment arm, rotates the brake cam, and removes the brake shoe friction plate. Press against the brake drum to brake.
The braking force of the diaphragm air chamber push rod is proportional to the input air pressure; the parking brake sub-chamber is a braking device that uses spring energy storage and deflation. The inflation pressure enters the pressure chamber from port 12 to generate a force acting on the piston. When the pressure is greater than 0.65MPa, the force acting on the piston is greater than the preload force of the spring, and the piston moves up to the limit, and the brake is released; When the air is completely vented, the spring pushes the piston down and pushes the main brake push rod to produce braking. The braking strength is related to the spring preload. When the air pressure in the pressure chamber is lower than 0.65MPa, the braking force generated by the sub-chamber is inversely proportional to the air pressure value. , So you can implement emergency braking.