Semi-floating half shaft means that the half shaft not only bears torque, but also bears bending moment. The inner side of such a half shaft is connected with the differential half shaft gear through a spline, the outer end of the half shaft is supported on the axle housing through a bearing, and the wheel is fixedly installed on the cantilever at the outer end of the half shaft. In this way, the various forces acting on the wheels and the resulting bending moments are directly transmitted to the half shaft, and then to the drive axle housing through the bearing. When the car is running, the half shaft not only drives the wheels to rotate, but also To support the full weight of the car. The inner end of this semi-shaft only bears the torque but not the bending moment, and the outer end has to bear the torque and all the bending moment at the same time, so it is called "semi-floating". Its structural feature is that the outer end is fixedly supported on a tapered roller bearing with a tapered surface and a key and the hub. The outward axial force is borne by the tapered roller bearing, and the inward axial force is transmitted to the other through the slider. Tapered roller bearings on side axle shafts.
The semi-floating semi-axle support structure is compact and light in weight, but the force of the semi-axle is complicated and it is inconvenient to disassemble and assemble. If the half axle is removed, the car cannot be supported on the ground. It can generally only be applied to small vans and light vehicles with small car loads, small wheel diameters, and rear integral axles, such as the common Wuling series and Songhuajiang series.