The function of the cross-shaft universal coupling connects two shafts and transmits power and movement.Generally, the two shafts are not concentric and are connected by a cross shaft universal coupling.Make the two shafts rotate at constant speed and smoothly. (1) It has cushioning and vibration reduction performance, which can reduce noise and automatically cycle lubrication; (2) Under the same rotating diameter and inclination, it can increase the load carrying capacity by 0.5 to 1 times; (3) Good synchronization, even with a single spherical hinge The plunger universal coupling can also ensure synchronization; (4) The initial compensation for axial x and radial y are both large, especially for axial x without external splines, which can be achieved [1]; (5) ) Novel structure, light weight, good manufacturability, easy mass production, and lower cost.