The invention relates to the technical field of engineering machinery, and discloses a superlift device, a crane and a control method of the crane, and the superlift device comprises a cargo boom, a superlift mast, a first connecting piece, a second connecting piece, a limiting mechanism and a pre-tightening device. When the lifting device is used, the lifting arm extends, the arm head of the lifting arm pulls the super-lifting mast to rotate around the hinge point through the first connecting piece, so that the lifting of the super-lifting mast can be realized, a traditional lifting oil cylinder is omitted, the structure is simple, the overall weight is reduced, the problem that the gravity center of a lifting arm of the super-lifting device is high when the lifting oil cylinder is arranged traditionally is solved, and the lifting stability is improved; when the super-lifting mast is lifted to the preset lifting angle, the limiting mechanism fixes the super-lifting mast at the preset lifting angle, so that the arrangement of a hydraulic oil cylinder is reduced, the layout is simplified, the weight is reduced, the cost is saved, the reliability is high, and the stability is good; the second connecting piece is pulled through the pre-tightening device, pre-tightening of the second connecting piece is achieved, the stability of the structure is improved, and the suspended load performance of the cargo boom is guaranteed.
本发明涉及工程机械技术领域,公开了超起装置、起重机及起重机的控制方法,超起装置包括:起重臂、超起桅杆、第一连接件、第二连接件、限位机构及预紧装置。起重臂伸长,起重臂的臂头通过第一连接件拉动超起桅杆绕铰点转动,即可实现超起桅杆的起幅,省去了传统的起幅油缸,结构简单,减轻了整体重量,解决了传统的设置起幅油缸时超起装置吊臂重心较高的问题,提高了吊载稳定性;在超起桅杆起幅至预设起幅角度时,限位机构将超起桅杆固定在预设起幅角度,减少了液压油缸的设置,简化布局,减轻了重量,节省了成本,可靠性高、稳定性好;通过预紧装置拉动第二连接件,实现对第二连接件的预紧,提高结构的稳定性,改保证起重臂的吊载性能。
Super-lifting device, crane and control method of crane
超起装置、起重机及起重机的控制方法
2023-09-08
Patent
Elektronische Ressource
Chinesisch
IPC: | B66C Krane , CRANES |
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