Two-stage speed change main reducer assembly for car

The utility model provides a two-stage speed change main reducer assembly for a car. The two-stage speed change main reducer assembly comprises an input shaft, and the input shaft penetrates through a box and extends to the inner side end of the box to be provided with a cone gear. The cone gear is meshed with a driving and driven gear, the driving and driven gear is fixedly arranged on a driven shaft, a gear hub and a gear sleeve are fixedly arranged on the driven shaft, the gear sleeve is driven by a shifting fork to move left and right, a high-speed driving gear and a low-speed driving gear are arranged on the two sides of the gear sleeve respectively, and the gear sleeve can be meshed with the end face of the high-speed driving gear and the end face of the low-speed driving gear. The driven shaft is freely sleeved with the high-speed driving gear and the low-speed driving gear. The high-speed driving gear is meshed with a high-speed driven gear, the low-speed driving gear is meshed with a low-speed driven gear, the high-speed driven gear and the low-speed driven gear are connected with a differential mechanism, and two independent half shafts are arranged on the two sides of the differential mechanism respectively. The speed reduction function is achieved through the cone gear and the driving and driven gear, and the speed change function of a reducer is achieved through the high-speed gears and the low-speed gears.