Polishing cup can protect tooth bent angle by repeated just direction changing tooth burnishing machine

The utility model provides a polishing cup can protect tooth bent angle by repeated just direction changing tooth burnishing machine, includes cup and base including polishing head and drive assembly,polishing head, the transmission recess has been offered at the rear portion of this base, be formed with the transmission curved surface in the transmission recess, and the pilot hole has been offered at the center, the transmission curved surface has a plurality of convex parts and concave part, regular undulation, drive assembly includes rotary main shaft, and during the pilot hole was worn tolocate in its upper end, just the upper end was equipped with driving head, and driving head is formed with the drive surface, meshes mutually with the transmission curved surface to it connects withthe transmission of polishing head to reach rotary main shaft, when driving head's drive surface touched convex part and the concave part of transmission curved surface in proper order, the polishinghead carried out forward ro