Recently, the tooth gear transmission company "synchronizer for automobile transmission" won the national patent. In accordance with the Patent Law of the People's Republic of China, the State Intellectual Property Office issued a rigorous review of the “Synchronizer for Automotive Transmissions†that was filed by Shantou Co., Ltd. and granted the patent rights for the utility model and issued the certificate. The patent number is ZL 2008 2 0098550.1. This patented technology relates to a synchronizer of a high-capacity short-stroke automobile transmission, which can significantly increase the transmission capacity and shift performance of the transmission. The patented technology has been applied to the bus-dedicated transmissions produced by Shanfang Co., Ltd. and can be widely used. It is used in domestic and foreign mid-to-high-end buses and buses and has a good application prospect and high added value.