1. Full floating axle shaft
The half shaft that only bears torque and its two ends do not bear any force and bending moment is called full floating half shaft. The outer end flange of the half shaft is fastened to the hub with bolts, and the hub is installed on the half shaft sleeve through two bearings far away. In the structure, the inner end of the full floating half shaft is provided with splines, the outer end is provided with flanges, and several holes are arranged on the flanges. It is widely used in commercial vehicles because of its reliable operation.
2. 3 / 4 floating axle shaft
In addition to bearing all the torque, it also bears part of the bending moment. The most prominent structural feature of the 3 / 4 floating axle shaft is that there is only one bearing at the outer end of the axle shaft, which supports the wheel hub. Because the support stiffness of a bearing is poor, in addition to the torque, this half shaft also bears the bending moment caused by the vertical force, driving force and lateral force between the wheel and the road surface. 3 / 4 floating axle is rarely used in automobile.
3. Semi floating axle shaft
The semi floating axle shaft is directly supported on the bearing located in the inner hole at the outer end of the axle housing with a journal close to the outer end, and the end of the axle shaft is fixedly connected with the wheel hub with a journal and key with conical surface, or directly connected with the wheel disc and brake hub with a flange. Therefore, in addition to transmitting torque, it also bears the bending moment caused by the vertical force, driving force and lateral force transmitted by the wheel. Semi floating axle shaft is used in passenger cars and some of the same vehicles because of its simple structure, low quality and low cost.
