Converter trunnion and gearwheel key connecting device

The utility model discloses a connecting device for a trunnion and a gearwheel key of a converter. A first tangential key groove is formed in the converter trunnion, a second tangential key groove isformed in the large gear, the first tangential key groove corresponds to the second tangential key groove, the length of the first tangential key is larger than that of the second tangential key, thefirst tangential key is arranged in the first tangential key groove, and the second tangential key is arranged in the second tangential key groove; the positioning block is arranged at one end of theconverter trunnion and makes contact with the large end of the first tangential key, and the combined positioning sleeve is movably connected with the converter trunnion and the tangential key pair. The length of the first tangential key in the tangential key pair is greater than that of the second tangential key; when the tangential key pair needs to be disassembled, the first tangential key andthe second tangential key ca