The role of the universal joint


      There is an important part of the car called the cross joint (c.v.joint & c.v.axle). The universal joint (c.v.joint & c.v.axle) is combined with a drive shaft called a universal joint transmission. In front-engine rear-wheel drive vehicles, the universal joint transmission is installed between the transmission output shaft and the drive axle main reducer input shaft; the front-engine front-wheel drive vehicle omits the drive shaft, and the universal joint installation. It is between the front axle axle and the wheel that are both responsible for driving and steering. A single gimbal joint (c.v.joint & c.v.axle) cannot equal the instantaneous angular velocity of the output shaft and the shaft input shaft, which may easily cause vibration, increase the damage of the mechanical parts, and generate a lot of noise. Therefore, the rear drive car's gimbal drive form uses double cross universal joints (cvjoint & cvaxle), that is, the drive shaft has a cross universal joint at both ends, its role is to make the drive shaft at both ends of the equal angle , ensure that the output shaft and the shaft into the shaft of the instantaneous angular velocity is always equal. By the same token, the joint between the off-road vehicle transmission and the splitter, the front-drive steerable axle and the half axle, all require this joint. The universal joint (c.v.joint & c.v.axle) is somewhat similar in structure and function to the joints on the limbs of the human body, allowing the angles between the parts to be joined to change. However, it differs from the active form of limb joints. It only allows the angle to change within a certain range. At present, the most widely used type of rear-drive vehicle is composed of basic parts such as a cross universal joint fork and a cross shaft. The cross shaft assembly is connected to the universal joint fork. The cross shaft shaft head is equipped with a needle bearing. When the shaft head inserts the universal joint fork, the cross shaft and the universal joint (cvjoint & cvaxle) fork are between There can be relative rotation, which also produces a multi-angle change. The spline connection on the cross universal joint fork can also make small movement of the axial direction, so that it can adapt to the need for simultaneous change of the angle and