Coaxial reducing mechanism and differential mechanism assembly

The invention relates to a transmission device of a new energy vehicle, in particular to a coaxial speed reducing mechanism and differential mechanism assembly, and solves the problems that an output shaft and a motor shaft of a speed reducing transmission mechanism in an existing electric vehicle are parallel shafts, and a speed reducer and a differential mechanism are independent mechanisms; and the speed reduction transmission mechanism of the electric vehicle is large in size, heavy in weight and incompact in structure. The coaxial speed reduction mechanism and differential mechanism assembly comprises a differential speed reduction planet carrier, a plurality of speed reduction mechanisms arranged on the differential speed reduction planet carrier and a differential mechanism matched with the speed reduction mechanisms. Outer teeth at the front end of each speed reducing mechanism are used for being meshed with outer teeth of an input gear, outer teeth at the rear end of each speed reducing mechanism are