1 judgment and elimination of unbalance of drive shaft

When the transmission shaft of the vehicle is unbalanced, a periodic sound will occur in the course of driving. The faster the speed is, the greater the noise will be. When severe, can make the body shake, the cab vibration, holding the steering wheel has numbness feeling. As the body shaking, will cause the vehicle parts of the loose, resulting in accidents. Cab vibration, which can cause solder joint cracking.

Causes of vehicle chattering are: (1) the drive shaft bending; (2) flange and axle tube welding position skew shaft; (3) intermediate support loosening bolts; (4) the middle position of the bearing deflection (5); joint damage; installation of substandard requirements; (6) the drive shaft the original balance block off.

Baotou North Benz parts transmission shaft imbalance, endangering safe driving. If the failure of transmission shaft imbalance, can use the following method to judge: front wheel with skids plugged, jack up the car to the side of the middle and rear drive axle; the engine, hang high gear, check the drive shaft vibration situation. When the speed of rotation is decreased, if the oscillation is increased obviously, the transmission shaft is bent or the flange is skewed. The shafts of the drive shaft are bent, most of which are caused by overloading the car. Because of overloading and over hanging, the faults of the shaft’s bending and breaking occur more frequently. If some cars, plus trailers to transport more than 60 tons of coal, the transmission shaft due to overloading, hanging damage seriously. In spite of the reinforcement of the middle support of the drive shaft and the strength of the flange fork, there is still a breakdown of the fracture.

Replacement of drive shaft parts, straightening, should be balanced check, the imbalance should meet the standard requirements. Technical condition of cardan shaft and hanger should also be examined in detail such as Yao, not by the installation requirements, cross shaft and roller damage caused Songkuang, vibration, will make the shaft out of balance.

Failure analysis of intermediate support damage of 2 transmission shaft

When the car runs, it makes a “beep” sound, the faster the speed, the greater the sound, that is, the middle support failure. The above-mentioned faults are specifically described as the failure of the middle support bearing of the drive shaft and abnormal sound. If the car at the start, “lattice lattice Leng Leng,” sound, and a vibration, is the intermediate support is fixed, shedding loose bolts should be timely maintenance. The inspection method is to park the car on a flat field, place the car in neutral, and twist the transmission shaft by hand. If the resistance is great, the fastening condition of the middle support bolt and the position of the intermediate bearing should be checked. If the drive shaft is loose, check the intermediate bearing and rubber sleeve of the hanger. Bearing missing oil should be filled with grease, rubber cover damage should be replaced.

Baotou North Benz parts transmission shaft intermediate support damage mainly for the following reasons: (1) lack of grease, resulting in wear and tear, and even damage. (2) the quality of the manufacture and installation of bearings, such as the improper installation of bearings and the deviation of bearings. (3) the bolt of the bracket is loosened or the bolt is fixed; the tightness of the bolt is not caused. (4) the bending of the transmission shaft causes unbalance and causes vibration. The middle support of the drive shaft is damaged. (5) the flange of the transmission terminal is loose, causing the hanger of the transmission shaft to be damaged due to too much force. (6) the quality of rubber sleeve manufacturing, the defects of the middle support frame.

Install the drive shaft center bearing, should adopt the following measures: to install the intermediate support, after fixing bolts with thread tension to a certain extent, don’t screw die, drive shaft disc by hand, should have no card, turn the shaft resistance should not be too large. The middle and rear wheel pad, start the engine, low speed rotation, hang the low gear, so that the drive shaft rotation, automatic alignment. Is looking after fastening bolts, should pay attention to tightening torque should be consistent. When the shaft is bent and deformed and produces vibration, the transmission shaft shall be removed and straightened, and the transmission shaft shall be checked. The main dynamic balance shall be checked. In use, the bearing shall be lubricated and checked regularly, and it is found that the bolts should be tightened in time. Replace the assembly if the intermediate support plate of the drive shaft is broken.

Causes and treatment of abrasion of cardan shaft of 3 drive shaft cardan joint

The failure of the cardan shaft of the drive shaft is mainly caused by the wear of the journal and bearing and the bending of the shaft neck. The center line of each axis of the cross shaft is not on the same plane, or the center of the two adjacent shafts is not vertical. The cardan shaft neck and bearing wear gap is too large, the cross shaft in operation as a result of shaking, the shaft centerline deviates from the rotation center line, so that the transmission shaft produces chattering phenomena and operation in the drive shaft out abnormal noise phenomenon. Wear is mainly caused by lack of lubrication. Cardan joint, cross shaft journal and bearing wear, from the use point of view should not exceed 0.02~0.13mm, generally maintained at around O.Olmm. If more than O.13mm, there will be vibration and vibration of the drive shaft phenomenon. If the cross axle journal is worn out of the groove, the groove is very deep, shall be repaired or replaced. If the surfacing and sheath repair, but also heat treatment and grinding processing. After machining, it is required that the roundness of each journal shall be O.Olmm, and the taper shall not be large (20mm length shall not be greater than O.O1mm). To check the verticality of the adjacent two axes, be sure to keep them upright. After machining, the axis of each journal should be in the same plane.

When the vehicle is moving, the force direction of the cross axle is consistent because of the direction of the torque transmission. In the course of time, one side wear caused by cross shaft journal; with the passage of time, the cross shaft stress side will wear increase, from the slot, so that Songkuang sound. It is possible to use the cross shaft to rotate 90 degrees relative to the original position, so that the use time can be prolonged. When assembling, it should be noted that the side of the nozzle is facing the drive shaft, and the universal joint fork should be rotated freely on the cross shaft. In normal maintenance, grease should be frequently injected to prevent wear of the cross axle journal and bearing due to the lack of grease.

Replacement of Baotou North Benz parts transmission shaft parts, straightening, should be balanced check, the imbalance should meet the standard requirements. Technical condition of cardan shaft and hanger should also be examined in detail such as Yao, not by the installation requirements, cross shaft and roller damage caused Songkuang, vibration, will make the shaft out of balance.