74results about How to "Strong fracture resistance" patented technology

The invention provides a lifting hook protection device of a crane. The invention provides the lifting hook protection device of the crane, which can prolong the service life of a lifting hook and is safe and reliable. The lifting hook protection device of the crane comprises the lifting hook and a hook-sliding-proof buckle; the lifting hook is sleeved with the lifting hook protection device and the lifting hook protection device is movably connected with the lifting hook; the lifting hook protection device comprises an insulating layer, a fireproof layer and a wear-resisting layer; the lifting hook is sleeved with the insulating layer and the insulating layer is movably connected with the lifting hook; the insulating layer is sleeved with the fireproof layer and the fireproof layer is fixedly connected with the insulating layer; the fireproof layer is sleeved with the wear-resisting layer and the wear-resisting layer is fixedly connected with the fireproof layer; the lengths of the insulating layer, the fireproof layer and the wear-resisting layer are equal and are greater than a half of the length of the lifting hook. According to the lifting hook protection device of the crane, the lifting hook can be effectively and completely protected; the waste of materials is reduced and the cost of the lifting hook protection device is reduced.