Power transmission device of rootstock excavator

The invention discloses a power transmission of a rootstock excavator, which is characterized in that a reduction box is connected between the front ends of two boundary beams; a circular chain box transmission shaft is mounted between the rear ends of the two boundary beams by bolts and bearing supports; a pair of bridge sector gears is mounted in the reduction box; a power input shaft extending from the front of the reduction box is mounted on the bridge sector gear in the front of the reduction box; output shafts at the two ends of the bridge sector gear at the back are connected with semi-floating half shafts respectively; the outer ends of the two semi-floating half shafts extend out of the boundary beams from the interior of the reduction box through bearing supports; a chain wheel is mounted at the outer end of each semi-floating half shaft; a rear chain wheel is mounted at each of the two ends of the circular chain box transmission shaft; power output crankshaft connecting rods are respectively mounted on the chain wheels; and a chain is connected between the front chain wheel and the rear chain wheel on one side. The power transmission has the advantages of simple structure, light weight, small size, low energy consumption, high efficiency, low noise and stable and reliable operation.