Leakage-free can turning device of garbage truck

The utility model belongs to the technical field of garbage treatment equipment, and provides a leakage-free can overturning device of a garbage truck, which comprises an oil cylinder I, an oil cylinder II, an oil cylinder III, a driving bracket, a moving frame and an overturning frame, a piston at the top end of the first oil cylinder is connected with the driving support through a fixing pin, the bottom end of the first oil cylinder is connected with the tail of the chassis truck, a piston at the top end of the second oil cylinder is connected with a turnover rocker through a pin shaft, a turnover connecting rod is connected with a pin shaft at the bottom end of the turnover rocker, and the bottom end of the second oil cylinder is connected with an oil cylinder fixing base through a pin shaft. The oil cylinder fixing base is fixedly installed at the tail of the garbage truck, the bottom end of the overturning connecting rod is connected with the overturning frame through a pin shaft, a piston at the top end