The invention relates to an automatic changing device of a
grinding wheel and a
grinding wheel cover of a vertical internal and external
grinding machine, wherein a body shell is fixed on a
machine body, a
servo motor is installed below the body shell, an output shaft of the
servo motor is connected with an input shaft of a speed
reducer through a transmission shaft located in the body shell, and the output shaft of the speed
reducer is connected with a
grinding wheel mounting disk; a rotating shaft is installed in the
grinding wheel mounting disk; the upper end of the rotating shaft is connected with a
grinding wheel cover mounting disk through a
clutch, the
clutch is connected with a cylinder
piston rod through a guide sleeve and a guide shaft, a cylinder is fixedly connected with a
clutch shell through a cylinder seat, and a spring is installed between the clutch shell and the grinding wheel cover mounting disk. According to the automatic changing device provided by the invention, the grinding wheel and the grinding wheel cover of the vertical internal and external grinding
machine can be changed automatically; the operation of changing a grinding wheel turntable and a grinding wheel cover turntable is switched by the clutch, and the operations can not interfere each other during the changing process; the clutch is controlled by the cylinder and the spring; and the mechanism is driven by a
numerical control servo motor, and the rotating and locating precision of the grinding wheel and the grinding wheel cover are high.