Automatic unhooking hanging hook

The utility model relates to an automatic tripping type lifting hook, belonging to the parts of hoisting equipment. The lifting hook mainly comprises pulling plates and a lifting hook; the upper part of the pulling plate is provided with an upper transverse shaft and the lower part thereof is provided with a lower transverse shaft; the two pulling plates are connected by the upper transverse shaft and the lower transverse shaft which are respectively fixed with the pulling plates by an upper transverse shaft nut and a lower transverse shaft nut; the lifting hook is arranged on the lower transverse shaft; and one end of the lifting hook is provided with a balance pole. The utility model is provided with the balance pole structure on the common lifting hook so as to lead the lifting hook to be capable of rotating freely on the transverse shafts; after the lifted object is in place, the load of the lifted object on the lifting hook is disappeared; and the lifting hook automatically form a moment by the gravity o