Overrunning differential mechanism

The invention provides an overrunning differential mechanism which consists of a main differential transmission device, a differential controller, a clutch, a left driving shaft and a right driving shaft. The main differential transmission device of the overrunning differential mechanism is the same in principle and different in structure as a symmetrical conical planetary gear differential mechanism in the prior art, the differential controller and the clutch are arranged on this basis, and therefore no slip loss occurs to driving force when a vehicle runs on a smooth road, and when the vehicle runs on a muddy road or there is no road due to ice and snow, or when wheels on one side are in idle-slipping without adhesion force, the speed loss is only 20%, the vehicle is still driven to runforwards by 80% of rotating speed of revolution, and at least 80% of the driving efficiency can be kept. 本发明提出了一种超越差速器，由主差速传力器、差速控制器、离合器、左驱动轴、右驱动轴五部分组成，本发明中的超越差速器的主差速传力器与现有技术中的对称式圆锥行星齿轮差速器原理相同而结构不同，在此基础上设置了差速控制器、离合器，达到了车辆在光滑路