The imbalance of the transmission shaft of the vehicle will appear in the driving cycle of the sound, the faster the speed, the greater the sound. When serious, can make the body shaking, cab vibration, hand steering wheel has a feeling of numbness. Because the body shaking, will result in the vehicle the parts of the loose, cause of the accident. Cab vibration, serious can cause solder joint cracking.
There are reasons for the vibration of the vehicle:
(1) drive shaft bending;
(2) the flange of the transmission shaft and the position of the shaft pipe welding;
(3) the middle support fixed bolt loose;
(4) the position of the middle supporting bearing is skewed;
(5) universal joint damage, installation is not required;
(6) the original balance block off the drive shaft.
Unbalanced transmission shaft, endanger the safe driving. The following method can be used to determine if there is an imbalance in the drive shaft:
The front wheel with wooden pad plugged, jack up the side of the car, the driving axle; the engine, hang high gear, check the drive shaft vibration of pendulum. When the rotational speed is decreased, the vibration of the rotating shaft is obviously increased, which indicates that the transmission shaft is bent or the flange is skewed.
The transmission shaft is bent, most of which is caused by the overload of the car. Coaler due to overload, hanging, shaft bending, fracture failure occurs. If some car coupled with the trailer pulled more than 60 tons of coal, transmission shaft due to overloading, overloading serious damage. In spite of reinforcing the intermediate support of the drive shaft, the strength of the flange fork is strengthened, but the fault is still broken.
The replacement of the transmission shaft part, after straightening, should balance checking, unbalance should conform to standard requirements. Technical conditions of the universal joint fork and a transmission shaft hanger should also do detailed examination, such as by the installation of undesirable, cross shaft and roller damage caused by loose Kuang, vibration, also can make the drive shaft out of balance.