1. The action principle brake chamber
brake chamber housing and the lid are made of stamped steel sheet, using the clamps, bolted together to form the entire housing, installed between them there cloth rubber diaphragm, the diaphragm entire housing is divided into two completely isolated from each other plenum. Gas chamber between the diaphragm and the cover through the dual-chamber brake air chamber between the diaphragm and the housing normally vented to atmosphere. When the free state, and the cover plate close to the diaphragm, while the other side is in contact with the disc on the push rod, with a return spring between the housing and the inner end surface of the disk, with the other end of the push rod clevis, with to connect brake adjusting arm. Entire brake chamber bolted in a special holder.
When the vehicle brakes are released, compressed air through quick release valve or dual-chamber brake discharged into the atmosphere, the diaphragm and the push rod in the brake chamber to restore the original state at the return spring.
When the vehicle brakes, air from the intake port into the brake chamber, the air under pressure so that the diaphragm is deformed, pushing the push rod and adjust the drive brake arm rotates brake cam the brake shoe friction plate to the brake pressure generated by the brake drum.