The universal joint cross shaft is not only an important part of the automobile power transmission system, but also an indispensable part of the forklift system. From the perspective of the structure of the forklift, for the front-wheel drive forklift, the drive shaft adopts a constant velocity universal joint.

Damage and repair of universal joint cross shaft

1. When the cross journal surface has marks, dents and journal wear greater than 0.04mm, it can be repaired by chrome plating or iron plating. The four-section journal grinding can also be reduced to the same size, and then used to increase the size of the roller needle. After the journal is reduced, the carbon layer should be carburized and heat treated. The roundness and cylindrical error of the journal after grinding should not be greater than 0.01mm; the perpendicularity error of the two shafts should not be greater than 0.1mm..
2. When assembling, the clearance between the journal and the bearing is 0.02-0.09mm, and the maximum clearance shall not be greater than 0.13mm..
3. The roller needle of universal joint bearing is worn, broken, grooves, etc. should be replaced..

Inspection and repair of sliding joints

1. When a universal sliding fork is broken, it should be replaced.
2. When the roller needle bearing hole is worn, it can be repaired by surfacing and then boring to fit the size..
3. The thread of the bearing supplier cover should be tightened, and the fit between the stop groove and the pin ring should not be loose