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, the going up of 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 housing screw is with the heavy inslot that the reason compressed tightly ball pivot under of going up of the lower edge of slide or slide for the clamp ring, and skateboard connection's annular structure upper surface is outwardly directed, ball pivot in the supporting. Its advantage is tha