Special reversal compressing support for bridge expansion apparatus

The utility model belongs to the technical field of a bridge expansion seam, which discloses a turning and impacting supporting seat specially used for a bridge expansion device. The utility model has the main technical scheme that the utility model comprises one side can be connected with a controlling box forming a bridge expansion device to form a whole, and the other side is a concave spherical surface connecting board; a convex spherical surface connecting body is clamped in the concave spherical surface of the connecting plate, and the bottom of the connecting body has a supporting beam bayonet capable of fixing and forming the bridge expansion device. The turning and impacting supporting seat specially used for a bridge expansion device has the characteristics of the adjusting functions that the longitudinal dislocation of a curb girder and a longitudinal girder of the expansion device can be freely adjusted, and the longitudinal, the transverse and the fan-shaped dislocation and deformation can be adjusted in three-dimensional directions.