Coupler centering detection device

The invention relates to a coupler centering detection device, which mainly aims to solve the technical problems that the coaxiality of a driving shaft and a driven shaft has deviation and it is difficult to realize centering in the installation process of a heavy mechanical equipment transmission system. The coupler centering detection device comprises a clamping ring, three axial connecting rods, a rotating wheel, a supporting frame and four dial indicators, wherein the periphery of the clamping ring is uniformly provided with three radial tightening screws which are vertically penetrate through the periphery of the clamping ring, and one end of each radial tightening screw is provided with a clamping piece perpendicular to the radial tightening screw; one end of the axial connecting rodis arranged in a sliding groove in the periphery of the clamping ring, the other end of the axial connecting rod is connected with a supporting arm of the supporting frame, a shaft hole of the supporting frame is sleeved on