Double -hung electric block of synchronous lift

The utility model discloses a double -hung electric block of synchronous lift, the surface mounting of I -steel has the electric block who does exercises through electronic operation dolly, electronic operation dolly includes the electronic dolly of main drive, the manual dolly of vice drive, the below of the electronic dolly of main drive links up endless chain electric block host computer, the chain bag is installed to endless chain electric block host computer one side, the chain bag is drawn forth the first sprocket that first bearing chain passes through in the endless chain electric block host computer and is led in the below of the electronic dolly of main drive, the chain bag is drawn forth the second sprocket that second bearing chain passes through in the endless chain electric block host computer and is led in the below of the manual dolly of vice drive, first sprocket, the 2nd chain wheel group becomes the chain roller box, one side of chain roller box is installed and is passed to the reduction gear system that the effect that slows down was done to endless chain electric block host computer to the active force of motor through the transmission shaft. The synchronous lift of load is guaranteed through the two complete synchronization actions of lifting hook down of two strands wheel to endless chain electric block device, is a fine innovation scheme.