Gear meshing run-out detection device

The utility model discloses a gear meshing run-out detection device, which comprises a horizontal bottom plate, a supporting structure is arranged on one side of the upper surface of the bottom plate, the supporting structure is provided with two V-shaped supporting surfaces which are spaced in the longitudinal direction of the bottom plate, and after a gear to be detected is installed on a rotating shaft, the two ends of the rotating shaft can be lapped and placed on the two V-shaped supporting surfaces respectively; a mounting bracket is arranged on the other side of the bottom plate, the mounting bracket comprises a supporting block which is vertically and upwards arranged, a driving gear is vertically and rotatably mounted at the upper end of the supporting block, and the driving gear is meshed with the to-be-detected gear on the rotating shaft; a transverse guide structure is arranged between the lower end of the mounting bracket and the bottom plate, so that the mounting bracket and the driving gear can