Four-wheel-drive automatic separation driving system of harvesting machine

The invention relates to a four-wheel-drive automatic separation driving system of a harvesting machine, and belongs to the technical field. Comprising a rear drive axle, a transmission shaft and a front drive axle, the rear drive axle is connected with the front drive axle through the transmission shaft, and the rear drive axle is connected with the transmission shaft through a connecting box; the connecting box comprises a shell, an input shaft, a middle shaft and an output shaft are arranged in the shell, the input shaft is sleeved with an input gear, the middle shaft is sleeved with a middle gear matched with the input gear, and the output shaft is sleeved with an output gear matched with the middle gear; the rotating shaft is provided with two sections, and one section of the rotating shaft is horizontally and obliquely arranged. The invention provides a four-wheel-drive automatic separation driving system of a harvesting machine, which is suitable for a small harvester, and has the advantages of small w