The utility model relates to the field of
grinding machines, and discloses a
grinding machine with a
grinding head convenient to replace, which comprises a grinding
machine body, a fixing sleeve and a grinding disc, a driving motor is fixedly connected in one side of the grinding
machine body, a
motor shaft is arranged at the driving end of the driving motor, a bolt hole is formed in the
motor shaft, and a bolt is arranged in the bolt hole. And plug pin blocks are fixedly connected to the two sides of the bottom of the
motor shaft correspondingly, plug pin columns are inserted into the plug pin holes, a fixing base is fixedly connected to the bottom ends of the plug pin columns, a grinding disc is fixedly connected to the bottom end of the fixing base, and the motor shaft is sleeved with a fixing sleeve. According to the
polishing machine, the U-shaped frame, the motor shaft, the fixing sleeve and the bolt rod are arranged, when the
polishing head needs to be replaced, the U-shaped frame rotates to be separated from the third through hole, at the moment, the bolt rod is pulled out to be separated from the first through hole and the second through hole, and after separation, the motor shaft at the bottom end of the
polishing machine body can be separated from the fixing sleeve.