Automatic locking device for locking check ring

An automatic locking device for a locking check ring comprises a knob insulator guiding and storing mechanism, an upper locking mechanism, a lower feeding mechanism and a rack. The knob insulator guiding and storing mechanism, the upper locking mechanism and the lower feeding mechanism are all arranged on the rack. The upper locking mechanism comprises an upper locking bottom plate, an upper locking air cylinder, a left locking arm, a right locking arm, an upper lifting air cylinder and a third guide rail. The lower feeding mechanism comprises a lower feeding mechanism bottom plate, a first guide rail, a clamping jaw mechanism, a lifting air cylinder, a lower feeding mechanism supporting plate, a second guide rail, a clamping jaw mechanism, a pushing air cylinder, a lifting air cylinder, alinear bearing and a guide rod. The device is connected with a circuit control unit and an air path control unit. The device is compact in structure and high in automation degree, it is mechanicallyguaranteed that the resist