Outer surface rust removal device

The utility model belongs to the technical field of steel rust removal, and particularly relates to an outer surface rust removal device, which solves the problems of high use cost and short service life in the prior art, and comprises a polishing mechanism, a pressure relief mechanism and a box body, the output end of the motor is connected with a rotating shaft through a coupler, the rotating shaft is coaxially arranged, the peripheral face of the rotating shaft is fixedly sleeved with a driving sector gear, a hydraulic press is installed at one end of the rotating shaft, a push rod is installed at the output end of the hydraulic press, and one end of the push rod is fixedly connected with a grinding piece through a screw. Through the arrangement of the motor, the grinding piece and other structures, when materials need to be ground, the hydraulic press is started firstly, the grinding piece is pushed to the needed position, then the motor is started, the motor rotates to enable the grinding piece to rotate