Replaceable modular oil supply device

The utility model discloses a replaceable modularized oil supply device which comprises a monoblock pump, an oil supply cam shaft, an oil supply cam shaft sleeve, a monoblock pump box and a crank case, and the monoblock pump box is provided with a cam shaft hole used for installing the oil supply cam shaft and a monoblock pump installation hole located on the upper portion and used for fixing the monoblock pump. An oil supply camshaft shaft sleeve is installed at one end of the oil supply camshaft, and the oil supply camshaft shaft sleeve penetrates out of the camshaft hole, extends into a transmission box in the crankcase and is in transmission connection with a transmission gear train; a reserved hole is formed in the corresponding position of the crankcase. An installation platform used for fixing the monoblock pump box is further arranged on the crankcase, an installation base detachably installed on the installation platform is arranged at the lower end of the monoblock pump box, the oil supply device mo