The universal transmission device of the forklift is mainly used when the two axes do not coincide, and in the operation of the forklift, the power transmission between the shafts whose relative positions are constantly changed. Used in forklifts with heavy load, the connection between the transmission and the drive axle, and the connection between the forklift engine and the oil pump. The universal transmission device of the forklift is composed of a universal joint fork, a cross shaft assembly, etc. Its function is to transmit the power of the transmission to the main reducer. The transmission shaft has large torque transmission, high speed and heavy work. Therefore, although its structure is not complicated, the technical requirements are high. Otherwise, chattering, noise, detachment and shaft breakage will occur.
The universal drive of the forklift truck should be tight and tight, with all bolts fully tightened, correct assembly angle, good lubrication, no jitter during driving and no abnormal noise. Therefore, in the use of the forklift, the maintenance of the transmission shaft should be carefully done, and problems must be dealt with in time if they are found.
When the forklift is driving, the transmission shaft must bear a large torque and impact load, and at the same time rotate at a high speed, accompanied by continuous vibration, its lubrication conditions are poor, so it is prone to wear, deformation and damage, resulting in abnormal work and abnormal noise And chattering. When the forklift starts, if the body trembles, it will be accompanied by the sound of "Ge. Ge"; you can still hear a periodic sound of the chassis during driving. In severe cases, the cab vibrates, holds the steering wheel, and the hand feels numb. The reasons are: the universal joint cross shaft and the needle are worn loose or the needle is broken; the fixing screws of each connecting part are loose. Bending deformation of the transmission shaft, etc. When encountering the above failures, you can go to the bottom of the vehicle to check whether the connecting screws are loose, and shake the drive shaft by hand to detect the worn parts; raise the rear wheel frame and rotate the gear to observe the vibration and abnormal noise of the drive shaft ; You can also detect the amount of deformation of the transmission shaft on the car dial indicator, and find out the cause, and then repair it separately.
Once the dynamic balance state of the transmission shaft assembly is destroyed, it will be subjected to additional dynamic load caused by centrifugal force during work, which is easy to produce bending deformation, causing vibration noise of the transmission shaft, increasing the dynamic load, reducing the transmission efficiency, and accelerating the damage of parts. Accidental impact of the drive shaft during use, knocking deformation during disassembly, destruction of the mutual position accuracy of the parts after surfacing, etc. will cause the center of rotation mass of the drive shaft assembly to deviate from the rotation axis, destroying its balance performance.
When curing, add grease to the cross bearing; when checking whether the cross bearing is loose, put the transmission into neutral, release the parking brake, hold the drive shaft shaft tube with both hands, and force it to rotate sharply from left to right. The slack of the slack is disassembled and repaired if necessary. During the maintenance of the transmission shaft, it is also necessary to check whether the fasteners are firmly fixed, and the appearance and curvature of the transmission shaft are repaired if necessary.
Before repairing and assembling the drive shaft, all its parts must be cleaned, especially the oil passage, journal and needle roller bearings of the cross shaft. It should be washed with clean kerosene and dried with compressed air. Apply grease to the mating surface and refit after matching marks. After the universal joint is installed, it should be flexible and there is no obvious difference
There should be no card issuance.
A transmission shaft is used to connect the forklift gearbox and the drive axle. This type of forklift drive shaft is composed of flanged fork, universal joint, cross shaft and bearing. The cross shaft is equipped with a lubricating oil cup, which can be filled with lubricating oil to lubricate each bearing. When the cross shaft produces excessive clearance in the needle bearing, the drive shaft should be disassembled, and the cross shaft or the needle bearing should be replaced according to wear (must be replaced in pairs). Bearing lubrication should use lithium-based grease. It is absolutely forbidden to lubricate with thick grease (such as calcium-based grease), because the use of heavy oil will accelerate the wear of bearings or cross shafts.
