Damping gear

The utility model discloses a damping gear. The device comprises a gear ring, a damping ring and a rotating shaft connecting ring, the damping ring is arranged between the gear ring and the rotating shaft connecting ring; teeth are arranged on the outer circumferential face of the gear ring, at least one through hole is formed in the gear ring, the damping ring and the rotating shaft connecting ring in the radial direction in a penetrating mode, one end of the through hole is located in the gear groove, a limiting piece is embedded in the through hole, the gear ring and the rotating shaft connecting ring are made of metal materials, and the damping ring and the limiting piece are made of rubber materials. The damping ring is arranged, accidental impact or vibration outside the gear is relieved through elastic deformation of the damping ring, a coupler is not needed, the transmission space is saved, and the transmission structure is simplified. Through the arrangement of the through holes and the limiting piec