Variable speed control mechanism for transmission system

The utility model belongs to the field of engine control, and particularly relates to a variable speed control mechanism for a transmission system. Comprising an alternating-current motor, a motor flange, a lubricating oil pump, a pipeline combination, an integrated valve assembly and a bottom plate, the integrated valve assembly is fixed to a valve seat, an oil way is arranged in the valve seat, the integrated valve assembly controls on-off of the oil way, the alternating-current motor and the valve seat are fixed to the bottom plate, and the lubricating oil pump is fixed to the alternating-current motor through the motor flange. The lubricating oil pump and the integrated valve assembly are communicated through the pipeline combination, the alternating-current motor drives the lubricating oil pump to work after working, pressurized lubricating oil is input into the integrated valve assembly through the pipeline combination in the lubricating oil pump according to changes of a volume cavity, and all valves i