The transmission shaft is composed of a shaft tube, a telescopic sleeve and a universal joint. The telescopic sleeve automatically adjusts the change in the distance between the transmission and the transaxle. The universal joint is to ensure the change of the angle between the output shaft of the transmission and the input shaft of the drive axle, and realize the constant angular speed transmission of the two shafts.
Universal joints are a key component on the driveshaft of an automobile. On the vehicle of rear-wheel drive, the universal joint drive shaft is installed between the transmission output shaft and the drive axle input shaft; Front-wheel drive vehicles, on the other hand, omit the driveshaft and the universal joint is installed between the front axle and the wheels, which are responsible for both driving and steering. A car is a moving object. On rear-drive cars, which are mounted on the frame as a unit, and the drive axle is connected to the frame by elastic suspension, there is a distance between the two that needs to be connected. The uneven road surface in the operation of the car produces runout, load change or the difference in the installation position of the two assemblies, which will make the angle and distance between the transmission output shaft and the drive input shaft change, so it is necessary to use a device of "variable strain" to solve this problem, so there is a universal joint.
