Double-cantilever-beam bridge portal crane

Abstract

The invention discloses a double-cantilever-beam bridge portal crane. The double-cantilever-beam bridge portal crane comprises a support frame, the top of the support frame is slidably connected with a crane cantilever beam, the crane cantilever beam comprises a main cantilever beam and an auxiliary cantilever beam, the main cantilever beam is slidably connected with the auxiliary cantilever beam, and the bottom of a butt joint box is provided with a driving mechanism used for driving the butt joint box to move in the length direction of the support frame. The main cantilever beam and the auxiliary cantilever beam are independently arranged and slidably connected, and the distance between the main cantilever beam and the auxiliary cantilever beam is adjusted through a suspension beam air cylinder, so that mutual interference of the main cantilever beam and the auxiliary cantilever beam during working is reduced, the main cantilever beam and the auxiliary cantilever beam can be independently allocated and transported, the working efficiency of the crane is improved, and meanwhile when objects with large sizes are hoisted and transported, the main cantilever beam and the auxiliary cantilever beam can be separated, the two sides of the to-be-hoisted objects are fixed correspondingly, and the stability of the hoisting process is greatly improved.

Description

technical field [0001] The invention relates to a crane, in particular to a double-cantilever bridge-gantry crane. Background technique [0002] The bridge gantry crane is a lifting device that is horizontally placed over the workshop, warehouse and stockyard for material lifting. Its two ends sit on tall concrete pillars or metal supports, shaped like a bridge. The bridge frame of the gantry crane runs longitudinally along the tracks laid on the elevated sides on both sides, which can make full use of the space under the bridge frame to lift materials without being hindered by ground equipment. It is a kind of hoisting machinery with the widest range and the largest number. However, the existing gantry cranes generally can only carry out hoisting movements in one direction at the same time, and the work efficiency is low; and the existing gantry cranes are inconvenient to operate when lifting objects with large volume or special shapes , and the stability of the item is ...

AI Technical Summary

Problems solved by technology

However, the existing gantry cranes generally can only carry out hoisting movements in one direction at the same time, and the work efficiency is low; and the existing gantry cranes are inconvenient to operate when lifting objects with large volume or special shapes , and the stability of the item is not enough when moving

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