What are the main components of a transmission shaft assembly?
Apr 28,2025
The drive shaft assembly consists of three main parts: the outer CV joint, the intermediate shaft, and the inner CV joint. The splines at both ends of the drive shaft assembly are used to connect the hub and the differential, respectively. The torque output from the engine reaches the hub through the differential, inner CV joint, intermediate shaft, and outer CV joint. There is one drive shaft assembly on the left side and one on the right side; the length of the left and right drive shaft assemblies is determined by the engine's layout position. In traditional drive shaft assembly structures, the telescopic sleeve welds the spline sleeve and the flange fork together, and welds the spline shaft to the drive shaft tube. The drive shaft assembly changes the traditional structure by welding the spline sleeve and the drive shaft tube into one piece, while the spline shaft and the flange fork become one.
The reason for the axial movement of the drive shaft assembly is that the motor shaft inevitably moves slightly axially during operation. The axial direction of the drive shaft assembly is the direction of the shaft, and the direction perpendicular to the axial direction is the direction of the cylindrical surface of the shaft. The degree of imbalance of the drive shaft assembly can be changed by factors such as the axial movement of the universal joint cross shaft in a small drive shaft assembly, the clearance of the drive shaft sliding splines, the alignment accuracy of the joints at both ends of the drive shaft assembly, the elastic deformation of the drive shaft during high-speed operation, and the spot welding process of balancing weights on the drive shaft. Due to the imbalance of the drive shaft assembly, abnormal noise and body vibration will occur when the drive shaft automatically starts. The noise becomes more obvious when the vehicle speed changes, and the noise from the drive shaft becomes clearer when the vehicle slips out of gear. In severe cases, the drive shaft may bend and break significantly.
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