| 摘要 |
An air-operated brake actuator, according to the present invention, comprises: a hollow upper housing; a hollow lower housing which is spaced apart in the direction of the lower part of the upper housing; a coupling housing which couples the upper housing and the lower housing for restraining and connecting the upper housing and the lower housing; a piston which is disposed in the upper housing and divides the inside of the upper housing into a spring chamber and a pressure chamber disposed on the lower part of the spring chamber; a hollow actuator rod which is disposed inside the piston; a caging bolt head which is disposed on the lower end of the actuator rod and has an air flow hole formed thereon; a pilot lip seal which is fixed to the outer surface of the caging bolt head and functions to enable the outer end of the air flow hole to be sealable; a compression spring which is installed inside the spring chamber; a diaphragm which is disposed in the lower housing and divides the inside of the lower housing into a service chamber and a push rod chamber disposed on the lower part of the service chamber; a pressure plate which is in contact with the lower end of the diaphragm so as to vertically move along the diaphragm; and a push rod which is positioned inside the push rod chamber by having one end thereof vertically coupled to the lower end of the pressure plate and the other end thereof passing through a through-hole of the upper housing. |
