The structure, influencing factors and maintenance methods of universal joints

Universal joint, which refers to the use of spherical and other devices to achieve shaft power output in different directions, is a very important part of automobiles. The combination of the universal joint and the drive shaft is called a universal joint transmission. On a vehicle with front-engine rear-wheel drive, the universal joint drive is installed between the transmission output shaft and the input shaft of the drive axle final reducer; while the vehicle with front-engine front-wheel drive omits the drive shaft, and the universal joint is installed Between the front axle half-shafts, which are responsible for both driving and steering, and the wheels.

structure
In automobile drive trains and other systems, in order to achieve power transmission between shafts whose axes intersect or whose relative positions often change, a universal transmission must be used. Universal joints are generally composed of universal joints and drive shafts, and sometimes intermediate supports are required. They are mainly used in Truck Spare Parts Cross Shaft the following positions: 1- universal joint; 2- drive shaft; 3- front drive shaft; 4- intermediate support

Between the transmission and the transaxle of a front-engine rear-wheel drive vehicle. When the distance between the transmission and the drive axle is long, the transmission shaft should be divided into two or even multiple sections, and an intermediate support should be added. Between the transfer case and the drive axle or between the drive axle and the drive axle of a multi-axle driven vehicle. Due to the deformation of the frame, the mutual position between the axes will be changed between the two transmission components.

Between the car with independent suspension and the differential. Steer between the differential of the drive axle and the wheels. In the power output device and steering mechanism of the automobile.

Influencing factors
Factors that affect the balance of an uncorrected gimbal include the following:
1. The unbalance caused by the manufacturing tolerance specified in the design specification of the main part of the universal coupling.
2. Unbalance caused by the eccentricity of the centering plane of the universal joint and the shaft.
3. The gap between the matching parts in the universal joint.
4. Unbalance caused by uneven or asymmetrical distribution of accessories in the universal joint.
5. Unbalance caused by uneven material or uneven wear of the parts of the universal joint.

Maintenance method
The maintenance of the universal joint cross shaft requires grinding gear oil. Since the lubricating oil nipple of the universal joint cross shaft needle roller bearing is an ordinary grease nipple, it creates an illusion for people. For a long time, grease has been generally added for lubrication. In fact, it is very difficult to add grease to the needle bearing from the grease nipple, and even to reach the end face of the cross shaft journal is very difficult. Lubrication with butter (i.e. calcium-based grease) can cause early damage to a large number of cross shaft needle roller bearings.