Composition: Air-pressure brake master cylinder is mainly composed of upper cavity piston, lower cavity piston, push rod, roller, balance spring, return spring (upper and lower cavity), upper cavity valve, lower cavity valve, air inlet, air outlet, exhaust Mouth, composed of vents.
Working principle: When the driver depresses the foot pedal, by pulling the lever, one end of the lever arm presses the balance spring to move the balance arm downward. First, the exhaust valve is closed, and the intake valve is opened. The intake valve is charged into the brake air chamber, and the air chamber diaphragm is pushed to rotate the brake cam to realize wheel braking, thereby achieving the braking effect.
This is a two-stage electromagnetic booster brake master cylinder that can achieve single-in, multiple-out, three-in, multiple-out, or dual-control side-by-side, it contains a pump cover, an upper pump body, a middle pump body, and a lower pump body. The pump cover and the upper pump body are provided with an upper piston assembly, the middle pump body is provided with an upper valve assembly and a lower piston assembly, and a rear brake air inlet and outlet holes, and the lower pump body is provided with a lower valve assembly and a front system Dynamic inlet hole and outlet hole, an upper piston sleeve is arranged between the upper piston and the upper pump body, the inner end of the pressurized inlet hole communicates with the lower end face of the upper piston sleeve, and the outer end thereof passes through a two-position three-way electromagnetic The valve is in communication with the rear brake air outlet, the air outlet chamber of the upper valve in the middle pump body is respectively connected to the rear brake air outlet, the sealed chamber between the lower end face of the upper piston and the bottom wall of the upper pump body, the lower piston or / and The upper end surface of the lower piston sleeve communicates with the sealed chamber between the top wall of the middle pump body. This type of brake master cylinder is simple in structure, good in use effect, has both good voltage stabilizing effect and strong braking effect, and is suitable for a variety of existing vehicle models.