A crane and its super-lifting device
A super-lifting device and crane technology, which is applied in the direction of cranes, etc., can solve the problems such as the mast space utilization rate required for the torque balance of the super-lifting device's rotation plane, and achieve the effects of convenient transportation, high space utilization rate and good moment balance effect.
Inactive Publication Date: 2014-10-15
SANY HEAVY IND CO LTD (CN)
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Problems solved by technology
[0007] In view of this, the present invention aims to propose a crane and its super-lifting device to solve the problem of the moment balance requirement of the slewing plane of the super-lifting device and the problem of the space utilization rate of the mast
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[0027] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0028] Figure 1 to Figure 5 That is the relevant drawings of this embodiment, as shown in the figure, the super-lifting device of the crane described in this embodiment is installed between the upper connecting platform 7 and the turntable 9 of the crane, and the upper connecting platform 7 and the turntable 9 are respectively connected The upper and lower ends of the column 8 of the crane, the super-lifting device includes an upper cantilever 1, a lower cantilever 6 and a pull plate assembly connected between the two. The upper cantilever 1 is hinged on the upper connecting platform 7, and on the upper connecting platform 7 There is also a driving device for driving the upper boom 1 to rotate ...
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The invention provides a crane and its super-lifting device, wherein, the super-lifting device of the crane comprises an upper boom, a lower boom and a tensioning device connected between them, the upper boom is hinged on the crane On the upper connecting platform, the lower cantilever is connected to the turntable of the crane, and a driving device for driving the upper cantilever to rotate around the column of the crane is also arranged on the upper connecting platform. Both the upper cantilever and the lower cantilever of the super-lifting device described in the present invention can be deployed in the circumferential direction relative to the column, and the moment balance effect on the turning plane is better; the upper cantilever can be rotated in the circumferential direction and is not fixed, and the space utilization rate is high ;The upper cantilever can be folded and closed with the upper connecting platform, which is more convenient for transportation.
Description
technical field [0001] The invention relates to the field of engineering machinery, in particular to a crane and a super-lifting device thereof. Background technique [0002] At present, the super-lifting devices of large-tonnage cranes are mainly in the following structural forms: ordinary large-tonnage cranes are generally installed on the jib; special wind power cranes use a foldable pull plate to connect the upper end to the fixed mast, and the lower end to connect the rotatable cantilever. When the crane is working, the superlift device converts the bending moment borne by the boom into an axial force, thereby improving the lifting capacity of the crane. [0003] When the super-lifting device adopts the above-mentioned fixed mast, there are the following disadvantages: [0004] 1. Limited by the transportation width, the width of the mast is very limited, and it is difficult to meet the moment balance requirements of the slewing plane; [0005] 2. The fixed mast takes...
Claims
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IPC IPC(8): B66C23/62
Inventor 王振忠马胜尹乐龙
Owner SANY HEAVY IND CO LTD (CN)