| 摘要 |
A spherical joint has an upper bearing assembly, a main supporting body, a lower bearing assembly, a linking body for linking the main supporting body and the lower bearing assembly, and an enclosing assembly. Four active hemispherical surfaces are defined. The upper bearing assembly has an active convex surface which, together with an active internal surface of the main supporting body forms an internal coupling. The external convex surface of the main supporting body cooperates with a concave active surface of the lower bearing assembly to define an internal coupling. The external and internal couplings compensate and adjust for wear and any deviation in concentricity between the couplings. The active surface of the lower bearing assembly is comprised a number of spring-loaded lobes equispaced from each other, and is covered with antifriction material. The pumping effect generated by the oscillating movement of the main supporting body creates a forced lubrication between the active surfaces defining the internal and external couplings. |
