Arc tooth flat connecting ring for mining ring chain

The utility model relates to an arc-shaped tooth flat connecting ring for a mining ring chain, which is composed of two identical half ring bodies, a center pin, a spring collar and a rubber pad. The center pin is arranged at the intermediate section of the half ring body. Two ring grooves are arranged on the inner wall. Two rows of arc-shaped teeth are arranged on the half ring body, and tenons and tenon grooves are respectively arranged at both sides of the half ring body. The utility model is characterized in that the number of the teeth is reasonably determined by the size of the chain ring, a tooth surface slopes by ten degrees, the curvature radius of a tooth point is small, the curvature radius of the tooth surface is big, the transition of a tooth root is by means of a circular arc, the inner chamfer angles of external teeth section are all forty-five degrees, size B is larger than the thickness of the connecting ring with the same specification, a ring groove, in which a rubber pad and a rubber pad are arranged, is arranged on the outer margin of the center pin. The service life of the ring chain is extended by means of the structure.