What is the solution to the axial movement of the universal joint

What is the solution to the axial movement of the universal joint?

Cross-shaft universal couplings with rolling bearings have been widely used in mining and metallurgy due to their high transmission torque, large allowable transmission inclination, high and stable transmission efficiency, small clearance impact, and high-speed operation. Widely used in industries. Through the use of the cross shaft universal coupling, it was found that the joint shaft oscillated greatly, causing damage to the bearing jacket of the roller set. After checking the cross bag, it was found that the cross shaft had a large axial movement. After disassembling the universal joint shaft cross bag, it was found that the cause of the shaft movement was the wear of the adjustment pad used to adjust the axial gap. After the adjustment pad was worn seriously, the cross shaft caused the axial movement when the gap was too large, causing the roller set bearing Damaged, due to this reason, the universal joint is broken prematurely.

Reasons for the axial movement of the universal joint Axial movement refers to the inevitable slight movement of the motor shaft along the axial direction during operation. The axis direction is the direction of the axis, and the direction perpendicular to the axis is the direction of the cylindrical surface of the axis.

The axial movement of the universal joint cross shaft in the universal coupling shaft assembly, the gap in the sliding spline of the coupling, the centering accuracy of the joint at both ends of the coupling assembly, the coupling during high-speed operation Factors such as the elastic deformation of the coupling and the process treatment when spot welding the balance sheet on the coupling can change the unbalance of the coupling assembly.

The universal coupling is a combination of a cross bag and a fork. The bearing jacket of the cross bag and the inner hole of the fork head are assembled by transitional fit, so as to achieve the purpose of the radial clearance of the universal joint as the radial clearance of the bearing; the inner hole of the fork head assembly bearing jacket has an inner circlip on the outside After the bearing is installed, the groove is fixed with a circlip to limit the outward movement of the bearing casing and play the role of axial fixing. The cross bag is composed of a cross shaft and four roller bearings, a bearing jacket, and an adjustment pad. Each shaft head of the cross shaft is covered with a roller bearing, the roller bearing is fitted with a bearing jacket, and the end face of each shaft head of the cross shaft An adjustment pad is installed between the inner end surface of the bearing housing, and the axial gap of the cross shaft is adjusted by an adjustment pad to prevent the adjustment pad from being worn out.

What is the solution to the axial movement of the universal joint? The solution is: a through hole is provided in the center of the bearing jacket; a threaded hole is provided in the center of the end face of the cross shaft; the adjustment pad is equipped with 1-4 pieces of wear-resistant disc springs (standard parts can be purchased); one piece with wear pads The bolts pass through the through hole of the bearing housing and the center of the wear-resistant disc spring is screwed into the threaded hole of the cross shaft head. Tighten the bolts to adjust the gap size during assembly, and fix glue should be applied to the threaded holes of the shaft head to prevent the bolts from loosening. The function of the disc spring is to add a pre-tightening force to the cross shaft to compensate for the axial clearance generated after the adjustment pad is worn.