Analysis of the cause of the sound of the drive shaft?
The reasons for the drive shaft sounding are as follows:
1. The spline toothed sleeve connected to the transmission output shaft and the transmission shaft generates a large gap after wear, and will produce a sound when starting, accelerating and braking;
2. The cross-bearing of the drive shaft is loose and wear, and it will produce a sound when starting, accelerating and braking. When severe, the cross bearing will fall off and it is easy to cause a rollover accident;
3. The dynamic balance block on the drive shaft falls off, or the dynamic balance is unqualified, and it will produce muffled sound when moving at high speed.
Treatment method in daily maintenance
The first case:
1) Check if the spline teeth on the output shaft are sharpened, and if the tip is sharpened, replace the output shaft;
2) Replace the drive shaft spline sleeve and drive shaft bearing;
The second case:
Replace the drive shaft cross bearing or replace the drive shaft assembly.
The third kind of situation:
Replace the drive shaft assembly
1. When the car starts or shifts during shifting, the drive shaft has a crash sound, especially when the low speed travels on the high speed gear.
2. When the car starts, there is no abnormal sound in the drive shaft, and the drive shaft has a crashing sound when the car is running.
3. When the car starts, there is no abnormal sound in the drive shaft, and the drive shaft has abnormal noise when the car is taxiing.
4. The car is constantly sounding throughout the driving process.
Second, analyze the cause of the failure
1. The flange joints (or connecting bolts) of the drive shaft are loose, causing abnormal noise.
2. All the grease nozzles (commonly known as grease nozzles), the cross shaft oil passages are blocked, the grease is not injected, the grease is not added on time, the cross shaft oil seal is damaged, and the oil leaks, which causes the cross shaft needle roller bearings to be in the long term. Working in the absence of lubricating oil, the cross journal, needle roller and sleeve are worn too much, causing looseness and causing abnormal noise.
3. The universal cross shaft assembly is too tight.
4. The sleeve and the universal joint fork-slip yoke hole are loosely fitted, and the support piece bolt is loosened, which causes the sleeve to rotate, so that the universal joint fork hole wears too much, and looseness causes abnormal noise.
5. The second shaft spline of the transmission and the spline inside the flange are worn too much, causing looseness and causing abnormal noise.
6. The fixing bolt of the middle support bracket-center bearing of the transmission shaft is loose, the intermediate support and the intermediate transmission shaft journal are loosely fitted, and the rear spline of the intermediate transmission shaft and the flange key groove are loosened and the rear end nut is loosened.
7. The intermediate support bearing of the drive shaft is loose, the bearing raceway is damaged, the bearing is poorly lubricated, and the wear is excessive and loose.
8. The installation position of the intermediate support bracket of the transmission shaft is skewed, the pre-tightening degree of the bearing is improperly adjusted, the rubber gasket spacer is damaged, and the fixing bolt of the intermediate center support bearing is too tight or too small to cause the deflection of the bracket position, etc. Abnormal sound.
9. The universal joint forks at both ends of the transmission shaft are not in the same plane, causing the constant velocity arrangement to be damaged and causing abnormal noise.