Spraying arm balance mechanism applicable to pesticide spraying device

The utility model discloses a spraying arm balancing mechanism suitable for a pesticide spraying device, which comprises a machine shell, limiting grooves are arranged on two sides of the bottom of the machine shell, the bottom ends of the limiting grooves extend to the outside of the machine shell, two groups of spraying arm bodies are arranged below the machine shell, nozzles are arranged at the bottom ends of the spraying arm bodies at equal intervals, and the spraying arm balancing mechanism is arranged on the machine shell. The two sides of the interior of the machine shell are rotationally connected with lead screws, the outer wall of one side of each lead screw is in threaded connection with a nut, a bearing rod is arranged at the center of the bottom end of each nut, the bottom end of each bearing rod penetrates through the corresponding limiting groove and is provided with a fastening frame, and a fastening block is installed in each fastening frame; the bottom end of the fastening block extends out