Bridge construction of belt wheel shape slide is with ball pivot of turning

The utility model provides a bridge construction of belt wheel shape slide is with ball pivot of turning, the ball pivot is fixed with the slide under, the last spherical surface machining of ball pivot has a perhaps cyclic annular groove that sinks of a plurality of the concyclic hearts down, the slide is fan -shaped, on it cambered surface and lower cambered surface be with ring -type heavy groove matched with structure, the sectorial slide of polylith inserts the cyclic annular inslot that sinks forms end to end's annular structure, on every slide, lower cambered surface one side be recessed stair structure, on the slide of edge, lower cambered surface's step department is provided with the clamp ring, the outer fringe that the housing screw will descend the one deck slide for the clampring and the lower edge synchronism of upper story slide compress tightly the heavy inslot of ball pivot under, and skateboard connection's annular structure upper surface is outwardly directed, ballpivot in the supporting.