Crane

Abstract

The present invention discloses a crane comprising a bipod and a balance weight hoisting device. The bipod is provided with a front support component and a collapsible rear pull component. The balance weight hoisting device comprises a suspending device and a jacking device. The balance weight of the crane is suspended below the front support component by the suspending device. The front support component, the suspending device and the balance weight rise or fall under the action of the jacking device. When the jacking device extends, the front support component can be jacked by the jacking device, and the balance weight is driven by the suspending device to simultaneously rise in the process. Thus, the bipod and the balance weight can be jacked by only one jacking device, multiple parts, such as pumps, valves, pipes, etc are saved. The structure of the crane is simplified, which facilitates the arrangement of multiple parts on a revolving platform. Meanwhile, the reliability of the crane is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane with a gable frame. Background technique [0002] There is usually a herringbone frame on the crane. The main function of the herringbone frame is to change the stress state such as the stress angle of the luffing wire rope, so as to realize the luffing of the boom smoothly. [0003] The gable frame usually includes a front brace and a rear pull, the bottom end of the front brace is generally hinged to the middle of the turntable of the crane, and the bottom end of the rear pull is generally hinged to the rear of the turntable of the crane; The top of the front support is hinged to the top of the rear pull. The back pull piece can be folded, when it is in the folded state, the herringbone frame can be placed on the turntable, when it is in the straightened state, the front brace and the back pull piece stand up and generally form a "herringbone" shape stru...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the existing cranes need to be equipped with multiple oil cylinders in order to realize the lifting of the gable frame and the counterweight, so there are many related hydraulic pumps, valves, pipelines and other components, and the structure is relatively complicated; while the turntable needs to be equipped with many mechanisms, The space is relatively tight, so the arrangement of related components is relatively difficult and the reliability is relatively low

In addition, more components and complex structure also lead to higher cost of the crane

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