Pump body assembly of oral irrigator

The utility model discloses an oral irrigator pump body assembly which comprises a pump body, a connecting rod, a piston, a flanging structure and a gear centrifugal shaft, the connecting rod is movably connected with the gear centrifugal shaft, the connecting rod is inserted into the pump body through a plug pin, the outer surface of the piston is sleeved with a piston sealing ring, and the flanging structure is arranged on the piston sealing ring. A flange structure is arranged on the outer surface of the piston sealing ring, a medium head screw is in threaded connection with the outer surface of the flange structure, a screw hole matched with the medium head screw is formed in the right side face of the piston, the lower surface of the pump body is communicated with a water inlet end cover, and the right end of the pump body is communicated with a water outlet end cover. After the structure is used for production, not only is the production, maintenance and rework cost of a factory reduced, but also the cu