3.2 Function description

Braking Process:
During braking, the knockout-pin in the air chamber pushes the lever to tilt.
The tilted lever brings the braking displacement and increases the braking force. The increased braking force makes the inner pad been pressed onto disc transfer with braking displacement to the bridge. After that, the bridge transfers the braking force to the tappets, which pushes the inner pad. After the clearance between the pad and disc is eliminated, the outer pad shall contact with the disc, therefore, the inner and outer pads shall lock the disc to implement braking.

Releasing Process:
Once the braking pedal is loosened, the air pressure in the chamber will be released, and the bridge will bring the tappets back to the initial position by the action of the return spring. In this way, a certain clearance can be guaranteed between the disc and pads.

Braking clearance self-adjusting process:
In order to ensure a certain clearance value between pad and disc, we designed an automatic adjuster which operates in every work cycle for the wear clearance of pad for the brake. Its touch sensitive device is mounted on the lever. If the clearance value is bigger than the set value, the adjuster will compensate the added clearance value through rotating tappets thread pair. The normal clearance value between the pad and disc is 0.7-1.2mm. Too narrow clearance may lead to superheat in the braking area. And if there is too large clearance, it will result in lack of braking torque power or braking failure.