Novel beam -pumping unit gearbox breather valve

The utility model provides a novel beam -pumping unit gearbox breather valve, includes: oil strain pond, connector, breather valve, coarse strainer, fretwork clamp plate, roof, thin filter screen, compression spring, mistake oilhole, exhaust hole, its valve oil strain pond is cylindrical hollow structure, and oil strain pond lower part is equipped with the connector, and oil strain pond inner chamber is equipped with the internal thread that the external screw thread that is equipped with with the breather valve is connected, the coarse strainer of packing into in proper order, fretwork clamp plate, compression spring, roof and thin filter screen in the space that both mutually supported, its breather valve bottom is equipped with straight tube -shape counter bore, and screw thread upper portion is equipped with a set of exhaust hole of lining up each other, its fretwork clamp plate A disc -shaped is equipped with the regular circular oilhole of crossing on the fretwork clamp plate. The utility model disclose