Semi-axis Classification

- Jun 18, 2019-

Semi-axis classification

1.Full floating half shaft

It is only subjected to torque when working, and its half-axis is called full-floating half shaft without receiving any force and bending moment. The outer end flange of the half shaft is bolted to the hub, which in turn is mounted on the half shaft sleeve by two distant bearings. The inner end of the structural full floating half shaft is splined, the outer end is flanged, and the flange has a plurality of holes. Widely used in commercial vehicles due to reliable work.

2.3/4 floating half shaft

In addition to the full torque, it also has to bear a part of the bending moment. The most prominent structural feature of the 3/4 floating half shaft is that there is only one bearing at the outer end of the semi-axle, and the bearing supports the wheel hub. Due to the poor bearing stiffness of a bearing, the half shaft is subjected to the bending moment caused by the vertical force, the driving force and the lateral force between the wheel and the road surface in addition to the torque. The 3/4 floating half shaft is rarely used in automobiles.

3. Semi-floating half shaft

The semi-floating half shaft is directly supported by a bearing near the outer end on a bearing located in the inner hole of the outer end of the axle housing, and the end of the semi-shaft is fixedly connected with the journal with a tapered journal and a key, or directly with a flange The wheel disk and the brake hub are connected. Therefore, in addition to transmitting torque, it also bears the bending moment caused by the vertical force, the driving force and the lateral force transmitted from the wheel. The semi-floating half shaft is applied to passenger cars and some vehicles for common use because of its simple structure, small quality and low cost.