The driver drives the crankshaft after speed reduction and torque amplification via the reduction gearbox. The crank-rocker mechanism converts the crankshaft’s rotary motion into reciprocating motion of the piston, which pushes the hydraulic oil inside the hydraulic chamber. The hydraulic oil transfers the piston’s thrust and volumetric variation to the hose diaphragm. Under the force transmitted by hydraulic oil, the hose diaphragm undergoes cyclic squeezing. This creates cyclic compression and release of the internal fluid chamber within the hose diaphragm, generating volumetric variation.Continuous fluid transfer is achieved through the combined operation of the inlet and outlet check valve assemblies.