Cambered surface polishing device for machining inner wall of hydraulic oil cylinder body

The utility model belongs to the technical field of hydraulic oil cylinder polishing. The cambered surface polishing device for machining the inner wall of the hydraulic oil cylinder body comprises a polishing motor, a rotating shaft is fixedly arranged at the output end of the polishing motor, a fixing block is fixedly arranged at the bottom of the rotating shaft, a plurality of fixing rods are fixedly arranged on the outer wall of the circumference of the fixing block in an annular symmetrical structure, and the outer walls of the circumferences of the fixing rods are sleeved with limiting sleeves. A sliding groove is formed in the circumferential outer wall of the fixing rod in a clamped mode, a sliding rod is slidably connected to the outer end of the fixing rod, two sliding blocks are fixedly arranged on the circumferential outer wall of the sliding rod in a symmetrical structure, and the polishing stones extrude the multiple polishing stones inwards so that the polishing stones can drive the sliding rod