The transmission shaft is composed of a shaft tube, a telescopic sleeve and a universal joint. The telescopic sleeve can automatically adjust the change of the distance between the transmission and the drive axle; the universal joint ensures the change of the angle between the transmission output shaft and the input shaft achieving two-axis isometric speed transmission.
The universal joint is a key component of a car. In front-engine rear-wheel drive vehicles, the universal joint drive shaft is mounted between the transmission output shaft and the transaxle final drive input shaft; universal joints are installed on both the drive and the steering.
The universal joint transmission must ensure that the relative position of the two connected shafts can transmit power reliably within the expected range; ensuring the connected shafts operate evenly with the additional load, vibration and noise due to the angle of the joint. It should be within the allowable range; the transmission efficiency is high, the service life is long, the structure is simple, the manufacturing is convenient, and the maintenance is easy.
For a car, since the output shaft of a cross-axis universal joint rotates at a constant speed with respect to the input shaft (with a certain angle), it is necessary to use a double universal joint or a multi-universal joint drive, and the yokes connected to the drive shaft are arranged in the same phase, same angles which are minimized when designing.www.morayshaft.com