Repair and maintenance methods of the universal tr

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Maintenance and maintenance methods of forklift universal drive

forklift universal drive is mainly used for power transmission between shafts whose two axes do not coincide and whose relative positions are constantly changed during forklift operation. It is used on forklifts with heavy loads (such as cpcd50 and 5cqn), the connection between transmission and drive axle, and the connection between forklift engine and oil pump. The universal transmission device of forklift truck is composed of universal joint fork, cross shaft assembly, etc. its function is to transmit the power of transmission to the main reducer. The transmission shaft transmits large torque, high speed and heavy work. Therefore, although its structure is not complex, its technical requirements are very high. Otherwise, buffeting, ringing, falling off and shaft breaking will occur

the universal transmission device of the forklift should be loose, the bolts should be complete and fastened, the assembly angle should be correct, the lubrication should be good, and there should be no shaking and abnormal noise during driving. Therefore, in the use of forklifts, the transmission shaft should be carefully maintained, and problems found must be dealt with in time

when the forklift is running, the transmission shaft has to bear a lot of torque and impact load. At the same time, it rotates at high speed, accompanied by continuous vibration, and its lubrication condition is poor. Therefore, it is easy to produce wear, deformation and damage, so as to work abnormally, and there will be abnormal noise, buffeting and other faults. When the forklift starts, if the body of the forklift makes a "proud take-off", it is exciting and trembling, accompanied by a "grid. Grid" impact sound; A periodic sound can be heard from the chassis during driving. The faster the speed is, the louder the sound is. In serious cases, the cab vibrates, and the hands feel numb when holding the steering wheel. The reasons are: the universal joint spider and the needle roller are worn loose or the needle roller is broken; The fixing screws of each connecting part are loose. Bending deformation of transmission shaft, etc. In case of the above faults, you can go to the bottom of the car to check whether the connecting screws are loose, and shake the transmission shaft by hand to detect the worn parts; Put up the rear wheel, shift and rotate it, and observe the vibration and abnormal sound of the transmission shaft; You can also check the deformation of the transmission shaft with a dial indicator on the vehicle, and repair them respectively after finding out the cause

once the dynamic balance state of the transmission shaft assembly is damaged, it will be affected by the additional dynamic load caused by centrifugal force in the work, which is easy to produce bending deformation, cause the vibration and noise of the transmission shaft, increase the dynamic load, reduce the transmission efficiency, and accelerate the damage of parts. Accidental impact of the transmission shaft during use, knocking deformation during disassembly and assembly, damage to the mutual position accuracy of parts after surfacing, etc. will make the rotating mass center of the transmission shaft assembly deviate from the rotating axis and destroy its balance performance

when curing, grease the cross bearing; When checking whether the cross bearing is loose, put the transmission in neutral, release the parking brake, and hold it tightly with both hands, which brings confidence to the extruder enterprise. The transmission shaft tube rotates sharply with force from left to right, without obvious looseness, and it should be removed, disassembled and repaired if necessary. During the maintenance of the transmission shaft, check whether the fasteners are fixed firmly, the appearance and curvature of the transmission shaft, and repair it if necessary

before the maintenance and assembly of the transmission shaft, its components must be cleaned, especially the oil passage, journal and needle roller bearing of the cross shaft, which should be cleaned with clean kerosene and dried with compressed air. Apply grease on the mating surface, and reassemble after aligning and marking. 2. The dial pointer has poor sensitivity. After the universal joint is reinstalled, it should rotate flexibly without obvious clearance, and there should be no hairpin

cpcd50 forklift gearbox and drive axle are connected by transmission shaft. The drive shaft of this type of forklift is composed of a flange fork, a universal joint, a cross shaft and bearings. The cross shaft is equipped with a lubricating oil cup, from which lubricating oil can be injected to lubricate each bearing. When the cross shaft produces excessive clearance in the needle roller bearing, the transmission pump should be disassembled and the cross shaft or needle roller bearing should be replaced according to the wear condition (it must be replaced in pairs). Lithium grease shall be used for bearing lubrication. It is absolutely forbidden to lubricate with thicker grease (such as calcium base grease), because the use of thick oil will accelerate the wear of bearings or cross shafts

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