Crane jib breakage and falling safety protection device

Abstract

The invention relates to a crane jib breakage and falling safety protection device, which comprises a jib. The jib has a chute, inside which a wire rope is arranged. The right end of the wire rope is connected to the jib. Multiple slide blocks which can slide in the chute are arranged on the wire rope. Each slide block is equipped with a gear rack; a gear which is engaged with the gear rack is arranged on the jib; a screw which can coaxially slide with the gear is arranged on the gear; and the screw is in threaded connection with the jib. Torsion springs are arranged on the jib. Two ends of each torsion spring are respectively connected to the jib and the corresponding gear. The jib has multiple support frames which are arranged below the jib. The left end of each support frame is hinged to the jib through a rotating shaft. Multiple demising grooves are arranged at the lower end face of the jib. Front and rear end faces of each demising groove are respectively provided with a vertical chute. Two ends of the rotating shaft are respectively placed inside the vertical chute. The bottom of the demising groove is provided with a counter bore, inside which an extension spring is arranged. The upper end of the extension spring is fixed inside the counter bore, and the lower end of the extension spring is connected to the rotating shaft. There is a safety rope on the support frame, and one end of the safety rope vertically passes through the jib and is extruded on the jib through the rear end of the screw.

Description

technical field [0001] The invention relates to the technical field of lifting equipment, in particular to a safety protection device for breaking and falling of 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...

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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