Synchronizing mechanism of transmission gear shifting system

A synchronizing mechanism of a transmission gear shifting system belongs to the technical field of transmissions. The outer wall of the gear hub is provided with a plurality of sliding block assemblies, and the outer side of the gear hub is sleeved with a gear sleeve in a meshed mode. The gear sleeve and the sliding block assemblies are arranged in a matched mode. The gear hub is attached to the wave spring and the end face of the transmission driven gear, the outer side of a hub of the transmission driven gear is sleeved with a gear combination gear ring, the outer side of a hub of the gear combination gear ring is sleeved with a synchronous ring, and the synchronous ring is attached to the other end of the wave spring and matched with the sliding block assembly and the gear sleeve. According to the invention, the problems of two-stage feeling of gear shifting and clamping stagnation of gear shifting are solved, scraping noise caused by operation of a transmission is eliminated, the service life of a gear co