The structure of the joint bearing is simpler than that of the rolling bearing. It is mainly composed of an inner ring with an outer sphere and an outer ring with an inner sphere. Generally, the joint bearing is used for swinging movement (i.e. angular movement) with low speed. Because the sliding surface is spherical, it can also make tilting movement (i.e. centering movement) within a certain angle range, and it can still work normally when the bearing shaft and shaft shell hole are not concentric.