The universal joint is the universal joint, which is a […]
The universal joint is the universal joint, which is a part that realizes variable-angle power transmission. It is used for the position where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission of the automobile drive system. The combination of universal joint and drive shaft is called universal joint transmission. On the front-engine rear-wheel drive vehicle, the universal joint transmission is installed between the transmission output shaft and the drive axle final drive input shaft; while the front-engine front-wheel drive vehicle omits the transmission shaft, and the universal joint is installed Between the front axle half shaft and the wheels, which are responsible for both driving and steering.
Symptoms of broken gimbal:
1. Fatigue peeling. The radial gap between the cross shaft and the bearing gradually expands due to wear, and the load appears to be concentrated. Fatigue indentation is caused in the place where the load is quite large, and finally a large area of fatigue peeling occurs;
2. Oblique imprinting occurs. When the total circumferential gap of the bearing in the universal joint cross shaft assembly is quite large, the needle roller is prone to skew, then a certain angle between the journal and the axis of the cross shaft will appear. Imprint
3. Lack of oil ablation, improper or insufficient use of lubricating oil, affects the high temperature of the universal joint cross shaft assembly during use, causes the bearing and journal to seize, damages the needle roller and sealing parts, etc., and finally causes Ablation on the surface of the ferrule; needle roller or gasket failure.
Because the oil nozzle and the cross shaft oil passage are blocked and the oil cannot be injected, or the lubricating grease is not maintained on schedule, or the cross shaft oil seal is damaged and the oil leaks, the cross shaft needle roller bearing will work for a long time under the condition of lack of oil. The cross shaft journal, needle roller and the inner hole of the sleeve are worn and loose; the sleeve and the universal joint hole are loosely matched, or the sleeve is rotated due to the loosening of the cover hole fastening bolt, so that the universal joint fork hole is worn Looseness; excessive wear of the spline teeth and flange spline grooves of the transmission output shaft, the connecting bolts of each flange are loose; the fixing bolts of the intermediate support bracket are loose, the intermediate support and the intermediate transmission shaft journal are loose, and the rear end of the intermediate transmission shaft The spline and the flange keyway fit loosely and the rear end nut is loose.