Introduction to the influencing factors and maintenance methods of universal joints

In automobile transmission systems and other systems, universal joints must be used to achieve power transmission between shafts that intersect or whose relative position changes frequently. The universal joint transmission is generally composed of a universal joint and a drive shaft, and sometimes there is an intermediate bracket, which is mainly used in the following positions: 1-universal joint; 2 drive shafts; 3 front drive shafts; 4 for the engine The middle brackets of the front and rear wheels drive the gearbox between the car and the drive axle. When the distance between the gearbox and the drive axle is very long, the drive shaft should be divided into two parts, or even multiple parts, and an intermediate support should be added. The multi-axle drive vehicle is located between the transfer case and the drive shaft or between the drive shaft and the drive shaft. Due to the deformation of the frame, a transmission member whose position changes between the two shafts is produced between the two transmission members. There is an independent suspension between the car and the differential. The steering between the axle and the wheel differential. In the power output device and steering mechanism of automobiles.

Influencing factors
1. Unbalance caused by manufacturing tolerances specified in the design specifications of the universal joint parts.
2. Unbalance caused by the eccentricity of the universal joint and the shaft center.
3. Match the gap between the parts in the universal joint.
4. Unbalance caused by uneven distribution or asymmetry of accessories in the universal joint.
5. Unbalance caused by uneven material or uneven wear of universal joint parts.
Maintenance
The maintenance of the universal joint cross shaft requires grinding gear oil. Because the lubricating nipple of universal joint cross shaft needle roller bearings is a commonly used grease fitting, it gives people the illusion that they have been lubricated with grease for a long time. In fact, it is difficult to inject the butter bearing from the grease assembly into the needle roller bearing, and it is difficult to reach the end face of the horizontal journal. Lubricating with butter (calcium-based grease) will cause early damage to a large number of horizontal shaft needle roller bearings.