Types of semi-axle commonly used in cars

Types of semi-axle commonly used in cars

　　The semi-axle commonly used in modern automobiles has two types of full-floating and semi-floating according to the different supporting types. (There are also three types, namely full-floating, 3/4-floating, and semi-floating)

　　Full floating half shaft

　　The semi-axle that only bears torque when working, and its two ends do not bear any force or bending moment is called a full-floating semi-axle. The outer flange of the half shaft is fastened to the hub with bolts, and the hub is mounted on the half shaft sleeve through two bearings far apart. Structurally, the inner end of the full-floating half shaft is made of splines, the outer end is made of flanges, and there are several holes on the flanges. Because of its reliable work, it is widely used in commercial vehicles.

　　3/4 floating half shaft

　　 In addition to bearing the full torque, it also bears 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 half shaft, which supports the wheel hub. Due to the poor supporting rigidity of a bearing, in addition to the torque, this kind of semi-axle 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 half shafts are rarely used in automobiles.

　　 Semi-floating half shaft

The semi-floating half shaft is directly supported on the bearing located in the inner hole of the outer end of the axle housing with a journal close to the outer end. The wheel disc and the brake hub are connected. Therefore, in addition to transmitting torque, it must also bear the bending moment caused by the vertical force, driving force and lateral force transmitted by the wheel. Semi-floating half axles are used in passenger cars and some cars with same use due to their simple structure, low quality and low cost.