The rotary bearing is composed of a lower bearing plate, a wear-resistant plate and an upper bearing plate, and at the same time bears the horizontal displacement, corner and other deformations at the end of the structure caused by load. Its biggest advantages are small size, high rigidity, high bearing capacity and small rotating torque.
The rotary ball hinge is composed of a lower ball hinge, a slideway, a sand box, a supporting foot, an upper ball hinge and a rotary traction system, and has the advantages of large bearing capacity, high machining accuracy and flexible rotation.