Fixed-diameter reamer cone mounting structure

The utility model discloses a fixed diameter reamer cone mounting structure which comprises a mandrel, three mounting arms are fixedly connected to the middle of the mandrel, grooves are formed in the bottom faces of the mounting arms, the grooves are connected with a mounting base in a sliding mode, limiting assemblies are arranged in the middles of the front side face and the rear side face of the mounting base, a cone is rotationally connected to the bottom face of the mounting base, and the limiting assemblies are connected with the cone. The cone is fixedly connected with a plurality of alloy teeth, and limiting holes are formed in the lower ends of the front side face and the rear side face of the mounting base. Due to the arrangement of the limiting assembly, when the cone needs to be replaced, the fixing bolt is screwed out, the limiting block is pressed, the installation base can be pulled out from the groove, after a new cone is replaced, the limiting block is pressed, the installation base is pushe