Abstract: The present disclosure relates to a double-lip seal of a pneumatic spring brake chamber for a vehicle, the double-lip seal has sealing performance between an inner circumferential surface of a through-hole of an adaptor housing and an outer circumferential surface of an actuator rod to prevent degradation in sealing performance of the lip seal, thereby maintaining constant sealing performance and preventing fluid leakage.

Abstract: The present disclosure relates to an engagement structure of a push rod guide and a push rod guide cover of a brake chamber for a vehicle, in which a pair of semi-circular, hingedly connected, half members in a shape of a plate are assembled at a side surface of an axial direction of the push rod into a shape of a disk, a push rod opening is formed at the center of the disk to guide a movement of the push rod, a protrusion projecting upwards is provided at a central part of the push rod guide, forming a step in a radial direction of the push rod guide, and a receiving groove corresponding to the step is formed on an inner circumferential surface of the push rod guide cover and is connected to the step.

Abstract: Disclosed is an air-operated brake actuator, including: a hollow upper housing; a hollow lower housing spaced apart from the upper housing in a lower direction; a coupling housing configured to couple and restrain the upper housing and the lower housing to each other; a piston disposed in the upper housing to divide an inside of the upper housing into a spring chamber and a pressure chamber disposed below the spring chamber; a hollow actuator rod disposed in the piston; a casing bolt head disposed at a lower end of the actuator rod and having an air flow hole formed therein; a pilot lip seal fixed to an outer surface of the casing bolt head to seal an outer end of the air flow hole; and a compression spring installed in the spring chamber.

Abstract: Disclosed is a brake actuator which is able to adjust the operational states of a brake connection to the lower end of a push rod disposed movable upward or downward while passing through the lower end of a service brake housing in such a way that a diaphragm moves upward or downward a pressure plate in response to the elastic force of a compressive spring in a spring chamber and the adjustment of an air pressure in a pressure chamber.

Abstract: Disclosed is a brake actuator which is able to adjust the operational states of a brake connection to the lower end of a push rod disposed movable upward or downward while passing through the lower end of a service brake housing in such a way that a diaphragm moves upward or downward a pressure plate in response to the elastic force of a compressive spring in a spring chamber and the adjustment of an air pressure in a pressure chamber.