Lifting hook

Abstract

The invention discloses a lifting hook, which comprises a U-shaped lifting lug, hook frame plates, a C-shaped hook body, a reversing column and a top column. The upper part of the hook body is hinged between the two hook frame plates through a hook body pin. The two hook frame plates are respectively provided with a long arc groove. Short arc grooves are correspondingly arranged on the hook body. The long arc grooves and the short arc groove share one axis with the hook body. A lifting lug transverse pin penetrates through the long arc grooves on the hook frame plates and the short arc grooves on the hook body to connect the two end parts of the U-shaped lifting lug. The reversing column comprises a circular pipe and a shifting fork, wherein the two ends of the circular pipe are closed and the shifting fork is connected at one end of the circular pipe. A long circular groove is arranged at the top end of the shifting fork. A shifting fork pin is arranged in the long circular groove and is hinged on the internal side of the upper part of the hook body. The two sides of the middle part of the circular pipe are hinged on the hook frame plates through a reversing column pin. A ball is arranged in the circular pipe. A top column groove for the ejection of the top column is arranged at the lower part of the circular pipe. The top column is movably connected on the hook frame plates and can move up and down along the hook frame plates. The lifting hook can be automatically opened or closed, no manual auxiliary lifting is required and no deformation is caused to the mouth of the pipes when being lifted.

Description

Technical field [0001] The invention relates to a sling, in particular to a hook. Background technique [0002] In the prior art, the hook for hanging steel pipes such as Picture 9 As shown, the U-shaped lifting lug is hinged on the circular plate through the lug cross pin at the lower end, and the circular plate is provided with a slot with one side open. When lifting the steel pipe, it is necessary to manually clamp the slot of the circular plate on the upper edge of the pipe mouth. After the pipe mouths at both ends of the steel pipe are clamped, the steel pipe is lifted by the U-shaped lifting lug by the wire rope. This kind of hook requires one person at each end of the nozzle during the lifting process, and is responsible for clamping the slot into the nozzle. Before the circular plate is stressed, it needs to be manually supported to prevent it from loosening. Responsibility to the worker More serious, the strength of the nozzle is relatively weak, and all the weight of t...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems existing in the existing hook, the present invention provides a hook, the lifting point is located inside the nozzle, which will not cause deformation of the nozzle

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