Automotive synchronizer

The utility model provides an automotive synchronizer which comprises a sliding block, a gear sleeve, a gear hub, a synchronous observation loop and gear connecting teeth. The gear connecting teeth are arranged on the gear hub, the synchronous observation loop is arranged in the gear connecting teeth, the upper portion of the synchronous observation loop is provided with the gear sleeve, the sliding block is arranged between the gear sleeve and the synchronous observation loop, the sliding block is overall composed of a spring, a steel ball and an outer punching ring, the steel ball is in contact with a sliding block groove below the gear sleeve, the outer punching ring is in contact with the gear hub, and the sliding block is arranged between the gear sleeve and the gear hub. The clearance between the sliding block and the synchronous observation loop of the synchronizer and the clearance between the gear sleeve and the synchronous observation loop are utilized and are matched and connected, the convenience of gear shifting is sensed in the gear shifting process under the action of the sliding block of the synchronizer, and a driver can clearly sense the smoothness of gear shifting, that is, gear shifting comfort is good. Meanwhile, in the objective evaluation process, the gear shifting curve is good.