Crane jib fracture safety device

Abstract

The invention relates to a crane jib fracture safety device, which comprises a jib. The upper end face of the jib is provided with a chute, inside which a wire rope is arranged. The right end of the wire rope is connected to the right end face of the chute through a first extension spring. The wire rope is equipped with multiple cutters which can slide inside the chute. The blade of each cutter is arranged at the lower left end of the cutter. The jib is provided with multiple support frames which are arranged below the jib. The right end of the support frame is hinged to the jib through a rotating shaft. The support frame is equipped with a safety rope, one end of which is connected to the support frame and the other end of which passes upwards through the jib and is connected to the jib. The safety rope is arranged at the left side of the blade of the corresponding cutter. The lower end face of the jib is provided with a demising groove which is corresponding to the support frame. Front and rear end faces of the demising groove are respectively equipped with a vertical chute. Two ends of the rotating shaft are respectively arranged inside the vertical chutes. The bottom of the demising groove is provided with at least a counter bore, inside which a second extension spring is arranged. The upper end of the second extension spring is fixed inside the counter bore, and the lower end of the second extension spring is connected to the rotating shaft.

Description

technical field [0001] The invention relates to the technical field of lifting equipment, in particular to a safety protection device for breaking a lifting arm. Background technique [0002] In the field of lifting equipment, some large-scale lifting machinery, such as tower cranes, bridge cranes, and truck-mounted cranes, all need to use booms to complete the lifting and transfer of heavy objects. It is more and more favored by people; however, in recent years, accidents of breaking the boom of the truck-mounted crane have occurred from time to time, and the broken boom will fall, and because the boom itself is heavy and the working position is high, when the crane When the arm falls to the ground or platform, it is very easy to cause casualties to varying degrees and damage to vehicles and equipment on the construction site, which brings a lot of unnecessary troubles and property losses to the project construction, especially in some serious accidents. The number of casu...

AI Technical Summary

Problems solved by technology

[0002] In the field of lifting equipment, some large-scale lifting machinery such as tower cranes, bridge cranes, truck-mounted cranes, etc., all need to use booms to complete the lifting and transfer of heavy objects. It is more and more popular among people; however, in recent years, accidents of breaking the boom of the truck-mounted crane have occurred frequently, and the broken boom will fall, and because the boom itself is heavy and the working position is high, when the crane When the arm falls to the ground or platform, it is very easy to cause casualties to varying degrees and damage to vehicles and equipment on the construction site, which brings a lot of unnecessary troubles and property losses to the project construction, especially in some serious accidents. The number of casualties is often large, so the truck-mounted crane poses a great safety threat to the on-site construction personnel during the operation

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