BRAKE ACTUATOR

摘要

The present disclosure is directed to ensuring a brake to be smoothly locked and released by preventing an air pressure of a spring chamber or a pressure chamber of an air operated brake actuator from being excessively compressed, and also solving a buckling phenomenon of a compression spring.

主权项

1. An air operated brake actuator comprising:
an upper housing having an opening at one end thereof and a through hole at the other end thereof; a lower housing having an opening at one end thereof and a through hole at the other end thereof; a coupling housing for coupling the upper housing and the lower housing to be fixed to each other; a piston having a through hole at a center thereof by dividing an inner side surface of the upper housing into a spring chamber and a pressure chamber; an inner fluid moving hole formed at one side of the piston to give a fluid flow path between the spring chamber and the pressure chamber of the lower housing through an actuator rod; a spring installed in the spring chamber; an actuator rod having openings at both ends so that one end is in contact with the through hole of the piston and the other end is inserted into a through hole at a top of the coupling housing; an actuator rod valve installed at a bottom of the actuator rod to adjust the flow of fluid between the spring chamber and the pressure chamber of the lower housing; a diaphragm for dividing the lower housing into a pressure chamber and a push rod chamber; a pressure plate contacting a bottom of the diaphragm to move vertically along the diaphragm; a push rod having one end perpendicularly coupled to a bottom of the pressure plate and the other end protruding outwards through the through hole of the lower housing; and a piston valve installed at the piston to adjust the flow of fluid between the spring chamber and the pressure chamber of the upper housing.