Built-in dust-proof sealing type gear bearing locking structure

The utility model relates to a built-in dustproof sealing type gear bearing locking structure, and belongs to the technical field of automobile mechanical steering gears. The structure comprises a gear shaft, a dustproof cover seat, a shell and a gap adjusting device, wherein the bottom end of the gear shaft is provided with a gap adjusting device through a shell, the upper end of the gear shaft is provided with a dustproof cover seat, the dustproof cover seat is in threaded connection with the shell, the gear shaft above the gap adjusting device is provided with a gear adjusting screw plug through a deep groove ball bearing, and a dustproof seal is movably arranged in the gear adjusting screw plug. The structure has the characteristics of simple structure and good practicability; the dustproof seal is additionally arranged in the gear adjusting screw plug, the dustproof and waterproof effects can be effectively improved while the bearing is locked in the working process, meanwhile, the stepped through hole 7