Ring counter weight device for crane

The utility model relates to the technical field of circular heavy hammers, in particular to a circular heavy hammer device for a crane, which comprises a first half heavy hammer and a second half heavy hammer, the two ends of the first half heavy hammer are contacted with the two ends of the second half heavy hammer, the two ends of the first half heavy hammer are provided with fixing screw holes, the two ends of the second half heavy hammer are provided with step screw holes, and the step screw holes are matched with the fixing screw holes. The two stepped screw holes correspond to the two fixing screw holes in position, and T-shaped screws are installed between the stepped screw holes and the fixing screw holes in a threaded mode. According to the utility model, the conventional square heavy hammer is changed into the circular ring-shaped assembled heavy hammer, so that the sensitivity of the switch is ensured, the spring of the travel switch is not damaged, the service life of the travel switch is prolong