In the course of vehicle driving, there are two kinds of relative motion of the wheel to the road, that is, rolling and sliding.

When the automobile turns, on both sides of the wheel center distance curve moved at the same time is obviously different, the outer wheel moving distance is greater than the inner wheel moves over the distance, if the wheels are fixed on the same axle, two wheel angular velocity is always equal, at this time, the outer side of the wheel is rolling edge the side sliding, and the inner wheel side slip rolling edge is inevitable. Similarly, due to the uneven road surface, the theoretical error of tire manufacturing and the degree of tire wear, the sliding or sliding of the wheel relative to the ground can also be caused by the different load of V3 or the different inflation pressure of the tire.

The slip or slip of wheels relative to the ground will not only aggravate the wear of V3 running parts, increase the power consumption, but also lead to bad steering and braking performance. Therefore, in order to guarantee the pure rolling of wheels in any case, we must disconnect the driving shaft of both wheels, and drive the two sides half shaft and wheel by the North Run V3 parts differential, so that the two sides of the wheel can roll at different speeds.