Flexibly rotating lifting hook

Abstract

The invention provides a flexibly rotating lifting hook which comprises a lifting hook, a cross beam, a thrust bearing and a nut, wherein the handle of the lifting hook penetrates the cross beam and is connected with the nut by threads; the nut is fixed above the cross beam, the thrust bearing is arranged between the cross beam and the nut; an upper groove and a lower groove are arranged at the lower part of the inner hole wall of the cross beam; a rolling device is arranged in the upper groove; sealing material is arranged in the lower groove; a boss is arranged on the upper surface of the cross beam; a notch is arranged on the lower surface of the nut; and the boss is matched with the notch. The rolling device is arranged between the handle of the lifting hook and the cross beam, and the upper part and the lower part of the cross beam are sealed, therefore, the rotation flexibility of the flexibly rotating lifting hook is improved effectively, the lifting accuracy and lifting safety of the lifting hook are guaranteed simultaneously, and the lifting hook has simple structure, low production cost and wide use value.

Description

technical field [0001] The invention relates to a hoisting hook, in particular to a flexibly rotatable hoisting hook. Background technique [0002] In cranes, the lifting hook is usually used to hang heavy objects for specific moving operations. Generally, the lifting hook includes a suspension hook and a beam, and the suspension hook can freely rotate 360 ​​degrees in the vertical direction, so as to facilitate lifting and positioning of heavy objects in all directions. [0003] With the continuous development of large-tonnage and super-large-tonnage cranes, the lifting capacity of the cranes has gradually increased; at the same time, the requirements for hoisting and positioning accuracy in lifting operations have become increasingly stringent. This undoubtedly puts forward higher requirements on the lifting capacity and rotation flexibility of the lifting hook. [0004] However, under the action of large load and partial load, the structure of the thrust bearing use...

AI Technical Summary

Problems solved by technology

[0004] However, under the action of large load and partial load, the structure of the thrust bearing used on the lifting hook in the prior art makes the friction between the hook handle and the inner hole of the beam serious, so that the lifting hook cannot rotate flexibly

In addition, the hoisting environment of the crane is usually relatively harsh, coupled with the neglect of maintenance and maintenance of the hook, long-term accumulated impurities and muddy water hinder the rotational movement of the thrust bearing, which further makes the rotation of the lifting hook difficult

If the lifting hook cannot rotate flexibly, it will not only fail to achieve accurate hoisting in place, but also cause the hoisting wire rope to become entangled with the hoisting object.

This has seriously affected the normal operation of the crane and caused certain safety hazards

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