The reason and treatment of wear and tear of universal joint cross shaft of transmission shaft
发布时间：2019.01.08 新闻来源：邢台远拓汽车零部件制造有限公司
The reason and treatment of wear and tear of universal joint cross shaft of transmission shaft
The failure of the universal joint of the drive shaft support is mainly caused by the wear of the journal and bearing and the bending deformation of each journal, which results in that the center lines of each axis of the cross shaft are not in the same plane, or the center lines of the adjacent two axes are not perpendicular. Because the wear gap between the journal and the bearing of the universal joint cross shaft is too large, the cross shaft will rock in operation, causing the center line of the transmission shaft to deviate from its rotating center line. The phenomenon of vibration and abnormal sound of the transmission shaft in operation. Wear is chiefly due to lack of lubrication. The wear of the journal and bearing of the universal joint cross shaft shall not exceed 0.02-0.13mm in terms of service condition, and generally remain around 0.01mm. If it exceeds 0.13mm, the vibration and sound of the transmission shaft will occur. If the cruciform journal is worn out and grooves are deep, repair or replace it. If surfacing and jacketing are used, heat treatment and grinding are also performed. After processing, the roundness of each shaft neck shall be 0.01mm, and the taper shall not be large (the length of 20mm shall not be greater than 0.01mm). To check the verticality of two adjacent axes, be sure to ensure that the verticality. The axis of each journal should be in the same plane after machining and repairing.
When the vehicle is running, the direction of torque transfer is consistent, so is the direction of force exerted on the cross shaft. Over time. Cause the unilateral wear of the cross shaft journal; As time goes by, the stress side of the cruciform axis will be increased wear, grooving, and loose sound. Can take the cross shaft rotate 90 ° in relative to the original position to use, it can extend the using time. In the assembly should pay attention to the oil nozzle side toward the drive shaft, universal joint fork should be freely rotating in the cross shaft, there should be a small clamping phenomenon, there should be no axial clearance. In peacetime maintenance should often note grease, to prevent the lack of grease caused by the cross shaft journal and bearing wear.
