Gear driving mechanism of rice transplanting machine

The utility model discloses a gear driving mechanism of a rice transplanting machine. The gear driving mechanism comprises a rotary box, a chain wheel shaft, a sun gear, a middle gear, tail end gears, pressing arms, springs and cams, wherein the two ends of the chain wheel shaft are rotationally arranged in the middle of the rotary box; the sun gear is fixed on the chain wheel shaft in a sleeving manner; the two tail end gears are rotationally arranged at the two ends of the rotary box by cam shafts; the middle gear is rotationally arranged on the inner side of the rotary box and is located between the sun gear and the tail end gears; the two sides of the middle gear are engaged with the sun gear and the tail end gears respectively; one pressing arm is arranged on one side of the corresponding tail end arm and one end of the pressing arm is hinged to the inner side of the rotary box; the cams are fixed on the cam shafts in the sleeving manner; the other side of each pressing arm is arranged on the cam and is arranged in a sliding mode; one end of each spring is fixed on the corresponding pressing arm; and the other end of each spring is fixed on the inner side of the rotary box. The gear driving mechanism of the rice transplanting machine has the advantages of simple structure and low cost, and the good driving effect is realized.