Central transmission gear with high temperature resistance and high rotating speed

The utility model discloses a high-temperature-resistant high-rotating-speed central transmission gear. The gear comprises a big wheel spiral tooth, a big wheel, a tooth piece connecting end, a big wheel shaft hole, a small wheel spiral arc tooth, a small wheel shaft hole, a transition circular bead, a groove, a body, a clamping block, a connecting shaft and a small wheel. The outer surface of thebull wheel is connected with bull wheel spiral teeth; the outer part of the large wheel is in engaged transmission connection with a small wheel through a large wheel spiral tooth; small wheel spiralarc teeth are arranged on the surface of the small wheel. Compared with a straight bevel gear, a helical bevel gear and other mechanisms which are driven by a traditional plane orthogonal shaft, thehelical arc teeth of the small wheel can be designed to have larger tooth thickness; compared with the prior art, the small gear has higher strength and rigidity, has higher bearing capacity and is suitable for popularization a