By tank, power establishment, reversing valve, pressure relief valve, oil pump body, pump oil institutions by the oil hole, high and low pressure oil pump body, eccentric shaft, eccentric bearing, driven gear and a pair of high pressure oil pump, and a low pressure oil pump, oil pump body suspended solid in the cap, high and low pressure oil out of the oil hole opening on the pump body, connected to the oil pressure relief valve, eccentric shaft longitudinally Settings, the upper central pivot in the pump body, the bottom is set eccentric bearing, driven gear fixed on the top of the eccentric shaft, and the dynamic mechanism, high and low pressure oil pump suspended solid in the oil.

On the pump body and each has a touch with eccentric bearing of moving parts, high and low pressure oil pump respectively with high and low pressure oil pump chamber of the oil hole is same. Advantages: connect the pump oil mechanism and motivation mechanism for the vertical connections, can make full use of space and small area, and is beneficial to operation and transportation; Will be high and low pressure oil pump pump oil form to actuation form of eccentric bearing, has the advantages of simple structure, less parts and assembly.