Definition, classification and structure of brake chamber and mechanism of action

Brake air chamber Definition of brake air chamber: The pressure of compressed air is converted into mechanical thrust, which plays the role of vehicle braking. It is the executive element in the air brake system of the car, and it is also an important safety part on the bicycle. Classification: 1. According to the function, there are single air chamber and double air chamber. 2. According to the structure, there are membrane type and piston type. 3. According to the connection method of the upper and lower shells, the membrane type can be divided into hoop type and spinning type. Structure description: The upper air chamber assembly and the middle air chamber assembly are assembled together by hoop or spinning to form a parking chamber, which acts as a parking brake. The lower air chamber assembly and the middle air chamber assembly are assembled together by spinning a hoop table to form a driving room, which plays the role of driving braking. The upper air chamber assembly is assembled from haldex Brake Caliper parts the upper air chamber housing, the brake spring, the spring seat and the tie rod assembly. The middle air chamber assembly is assembled by the middle air chamber, O-ring, mandrel, mandrel push plate and mandrel return spring. The mandrel and the mandrel push plate are connected by a willow connection. The tie rod assembly is composed of tie rod, tie rod washer and railing nut. It is only used when it has been disassembled for assembly, installation and damage. It is used to tighten the brake spring in the upper air chamber assembly. In normal use, the tie rod should be removed and its Tighten the tie rod nut in the tie rod hole on the side of the middle air chamber. The above statement is the definition, classification and mechanism description of the brake chamber.
The housing and cover of the brake chamber are stamped from steel plates, and are connected together with clamps and bolts to form the entire shell. Completely isolated air chamber. The air chamber between the diaphragm and the cover is connected to the double-chamber brake valve, and the air chamber between the diaphragm and the housing is usually connected to the atmosphere. In the free state, the diaphragm is in close contact with the cover plate, and the other side is in contact with the disc on the push rod. to connect the brake adjustment arm. The entire brake chamber is bolted to a special bracket. When the car is released from the brake, the compressed air in the brake air chamber is discharged to the atmosphere through the double-chamber brake valve or the quick release valve, and the diaphragm and push rod return to their original state under the action of the return spring. When the car brakes, the air enters the brake air 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 rubs the brake shoes The disc presses against the brake drum to generate braking.
When the car brakes, the air enters the brake air 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-type 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 air release. The inflation pressure enters the pressure air chamber from port 12, and generates 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, the piston goes up to the limit, and the brake is released; When the air is completely emptied, the spring pushes the piston down and pushes the main brake push rod to generate braking. The braking strength is related to the spring preload; when the 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 emergency braking can be implemented.