The forklift universal joint transmission is mainly used when the two axes do not coincide, and the power transmission between the shafts of the relative position is constantly changed during the operation of the forklift. Used on heavy-duty forklifts (such as CPCD50, 5CQN), the connection between the transmission and the drive axle, and the connection between the forklift engine and the oil pump. The forklift universal joint transmission is composed of a universal joint fork, a cross shaft assembly, etc., and its function is to transmit the transmission power to the final reducer. The transmission shaft transmits large torque, high speed and heavy work. Therefore, although its structure is not complicated, the technical requirements are very high. Otherwise, there will be shaking, ringing, falling off and shaft breaking.
The universal transmission of the forklift truck should not be tight, the bolts are fully tightened, the assembly angle is correct, the lubrication is good, no vibration during driving, no abnormal noise. Therefore, in the use of forklifts, the maintenance of the drive shaft should be carefully done, and problems must be dealt with in a timely manner.
During the operation of the forklift, the transmission shaft is subjected to a large torque and impact load, and at the same time, it is rotated at a high speed. With constant vibration, the lubrication condition is poor, so it is prone to wear, deformation and damage, resulting in malfunction and abnormal noise. And vibrations such as shaking. When the forklift starts, if the body is trembling, accompanied by the impact of "Gla. Ge"; while driving, you can hear the periodic sound of the chassis, the faster the speed, the louder the sound. In severe cases, the cab vibrates, holding the steering wheel, and the hands are numb. The reasons are as follows: the universal joint cross shaft and the needle roller are loose or the needle is broken; the fixing screws of the connecting portions are loose. The drive shaft is bent and deformed. When encountering the above-mentioned faults, you can check whether the connecting screws are loose at the bottom of the vehicle, and shake the drive shaft by hand to detect the worn parts. Turn the rear wheel frame and the gear to rotate, and observe the vibration and abnormal noise of the drive shaft. It is also possible to detect the deformation of the drive shaft on the dial gauge of the vehicle, and after repairing the cause, repair it separately.
Once the dynamic balance state of the transmission shaft assembly is broken, it will be affected by the additional dynamic load caused by the centrifugal force during the work, which is easy to produce bending deformation, causing vibration and noise of the transmission shaft, increasing the dynamic load, reducing the transmission efficiency, and accelerating the damage of the parts. In the event of accidental impact of the drive shaft during use, the knocking deformation during disassembly and assembly, the mutual positional accuracy of the parts after surfacing, etc., will cause the center of the rotating mass of the drive shaft assembly to deviate from the axis of rotation and destroy its balance performance.
When curing, it is necessary to add grease to the cross bearing; when checking whether the cross bearing is loose or not, open the transmission to the neutral position, loosen the parking brake, and hold the transmission shaft tube with both hands, and the force is sharply turned left and right, there should be no obvious The amount of loose sputum, if necessary, remove the decomposition repair. When the drive shaft is being maintained, check whether the fasteners are firmly fixed, the appearance and bending of the drive shaft, and repair if necessary.
Before repairing the drive shaft, all parts must be cleaned, especially the oil passage, journal and needle bearing of the cross shaft. It should be cleaned with clean kerosene and blown dry with compressed air. Apply grease to the mating surface and replace it with the mark. After the universal joint is installed, it should be flexible and flexible without obvious gaps, and there should be no card issuance.
The transmission shaft of the CPCD50 forklift gearbox and the drive axle is connected. The forklift drive shaft is composed of a flange fork, a universal joint, a cross shaft and a bearing. The cross shaft is provided with a lubricating cup, which can inject lubricating oil and lubricate the bearings. When the cross shaft creates an excessive gap in the needle bearing, the drive should be disassembled and the cross shaft or needle bearing should be replaced according to the wear condition (must be replaced in pairs). Lithium-based grease should be used for bearing lubrication. It is absolutely forbidden to lubricate with thicker greases (such as calcium-based greases) because the use of thick oils can accelerate the wear of bearings or cross shafts.
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