Automatic strike limit device

The utility model discloses an automatic strike limit device, the switch comprises a switch device, the setting is at the testing arrangement of switching device one end, the auxiliary relay coil thatthe setting possesses on testing arrangement, the first middle normally open contact of setting on the auxiliary relay coil, the setting is a time relay coil on the normally open contact in the middle of first, the 2nd time relay coil, the setting is at a time relay coil, normally closed interlock on the 2nd time relay coil's the second port, the 2nd normally closed interlock, the setting is at anormally closed interlock, first solenoid valve on the 2nd normally closed interlock second port, the second solenoid valve, normally open contact in the middle of the second of setting on the 2nd normally closed interlock, the setting is the press on the normally open contact in the middle of the second, the utility model discloses replacing traditional pure craft mechanism of stamping by striking the limit automatically