Detection device for bearing play of speed reducer

The utility model discloses a detection device for bearing play of a speed reducer, and belongs to the technical field of speed reducer detection. A detection device for bearing play of a speed reducer comprises a clamping mechanism arranged on an inner ring of a bearing, the clamping mechanism comprises a lower clamping seat and an upper clamping seat, and a play detection assembly is arranged atthe upper end of the front side of the upper clamping seat. According to the utility model, the upper clamping seat and the lower clamping seat are fixed on the inner ring of the cylindrical roller bearing through screws; then, the inner ring is used in the rotating process; inertia of steering force borne by the detection ball body in the mounting base is always kept at the outermost end of theinner side of the mounting base, and the distance between the detection ball body and the outer ring of the bearing can be shortened only when the inner ring of the bearing moves, so that the detection ball body extrudes the p