Active protection device for crane arm breaking and falling

Abstract

The invention relates to an active protection device for crane jib facture falling. The active protection device comprises a jib, a sliding groove is formed in the jib, a steel wire rope is arranged in the sliding groove, the right end of the steel wire rope is connected with the jib, multiple sliding blocks capable of sliding left and right are installed on the steel wire rope, a rack is arrangedon each sliding block, gears meshed with the racks are arranged on the jib, each gear is provided with a screw which is coaxially and slidably connected with the gear, the screws are connected with the jib through threads, torsional springs are installed on the jib, and the two ends of each torsional spring are connected with the jib and the corresponding gear respectively; multiple support frames arranged on the lower portion of the jib are arranged on the jib, the support frames correspond to the sliding blocks one to one, the left end of each support frame is hinged to the jib through a rotation shaft, and a straight groove is formed in the left end of each support frame; clamping blocks capable of vertically sliding are arranged on the jib, the lower end face of each clamping block makes contact with the upper end face of the corresponding support frame, springs arranged on the clamping blocks are arranged on the jib, and the two ends of each spring make contact with the jib and the corresponding clamping block respectively; each support frame is provided with a safety rope, and one end of each safety rope penetrates into the jib in a vertically upward mode and is extruded onthe jib through the back end of the corresponding screw.

Description

technical field [0001] The invention relates to the technical field of lifting equipment, in particular to an active 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. Th...

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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