Transmission gear positioning mechanism

The utility model discloses a transmission gear positioning mechanism which comprises an operating device shell, an air cylinder is arranged on the operating device shell, an air cylinder cover plate is arranged on an air cylinder opening, a gear selecting shaft and a gear selecting rocker arm are connected through a key, one end of the gear selecting rocker arm extends into an open groove of a gear shifting block, and the other end of the gear selecting rocker arm extends into the open groove of the gear shifting block. The gear shifting block and the control block are fixedly installed on the gear shifting rod, the gear shifting rod is installed on the operating device shell, a right-angle shaft shoulder is arranged at the end, close to the gear shifting block, of the control block, the handle ball is connected with the air tank, the air cylinder and the gear selecting shaft, the piston comprises a piston body and a piston rod, the piston body is arranged in the air cylinder, and the piston rod extends out