Controllable variable piston pump

The utility model discloses a controllable variable piston pump, set up a circular shape cylinder as the pump body, set up a plurality of plunger hole as the inlet port in the pump body, into oil pipeand play oil pipe are connected respectively to the inlet port, gomphosis pump shaft in the plunger hole, the other end of pump shaft is equipped with the spherojoint, the outer disc of the pump bodypasses through the muffjoint gearbox, the output shaft middle part cross -under adjusting plate of gearbox, the middle part of output shaft top through selling hub connection application of force dish of gearbox, the back that the spiral shell closed a plurality of adjusting screw conflict application of forces dishes on the adjusting plate is adjusted it, the front of application of force dish is connected respectively through a plurality of bulb seats and drives the spherojoint and the pump shaft stretches out and draws back, the flexible workmanship of pump shaft inhales hydraulic oil fromadvance oil pipe, blowout