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Inter-section connecting structure of horizontal cantilever type cargo boom of tower crane

A tower crane and connecting structure technology, applied in the direction of cranes, etc., can solve the problems of a large number of pins or bolts, uneven force, low safety, etc., to reduce constraints and containment, high installation efficiency, and reduce pins and the effect of bolted connection

Pending Publication Date: 2021-03-19
KERUN ELECTRO MECHANICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main chords between two adjacent sections of the traditional horizontal cantilever jib are all connected by pins or bolts (see Figure 5 , Image 6 ), generally the number of main chords in each section is three or four, so the number of pins or bolts used to connect each section of the traditional horizontal cantilever boom is huge, the installation is labor-intensive and time-consuming, and the disassembly is difficult; Moreover, the upper and lower main chords of the adjacent sections are all connected by pins or bolts, the force is not clear, the force is uneven, and the safety is not high.

Method used

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  • Inter-section connecting structure of horizontal cantilever type cargo boom of tower crane
  • Inter-section connecting structure of horizontal cantilever type cargo boom of tower crane
  • Inter-section connecting structure of horizontal cantilever type cargo boom of tower crane

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Experimental program
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Effect test

Embodiment 1

[0026] Such as Figure 1 to Figure 4 As shown, the internode connection structure of a horizontal cantilever boom of a tower crane according to Embodiment 1 includes double hinge pin plates 3 arranged at both ends of two upper chords 2 in the front and rear adjacent boom sections 1 (After the pin shaft 4 is inserted, the quick connection of the two upper chords 2 in the front and rear adjacent boom sections 1 can be realized, which has the advantages of convenient assembly and high installation efficiency; The shaft 4 bears the shear force, and the force is clear), and the pin shaft 4 in the pin hole 3-1 of the double hinge pin plate corresponding to the corresponding paired double hinge pin plate at the front and rear adjacent boom sections is inserted horizontally (to realize the The quick connection of two upper chords 2 in section 1, and the pin shaft 4 bears the shear force), which is fixed on the stressed pressure plate 6 at both ends of the lower chord 5 in the boom sec...

Embodiment 2

[0030] The difference between the second embodiment and the first embodiment is that the jib section 1 described in the second embodiment connects two upper chords 2 and two lower chords 5 that are parallel to each other through webs 7 to form a square cross section. The truss structure (high rigidity, especially more suitable for large-tonnage tower cranes). In Embodiment 1, there is a lower chord 5 in each boom section 1, and the cross section of the boom section 1 is an inverted triangle.

[0031] Concrete usage of the present invention is as follows:

[0032] Firstly, according to the lifting tonnage, make the required number of jib sections 1 with an inverted triangular truss structure in cross section (Example 1, simple and stable structure, especially more suitable for tower cranes with small tonnage) or square truss in cross section The boom section 1 of the structure (high rigidity, especially more suitable for large-tonnage tower cranes), that is, the two upper chor...

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Abstract

The invention discloses an inter-section connecting structure of a horizontal cantilever type cargo boom of a tower crane, and belongs to the technical field of hoisting machinery. The inter-section connecting structure comprises double-hinge pin plates arranged at the two ends of two upper chords in front and back adjacent cargo boom sections, pin shafts transversely inserted into pin holes in the double-hinge pin plates correspondingly matched with the front and back adjacent cargo boom sections, and stress pressing plates fixed to the two ends of each of lower chords in the cargo boom sections; and joints between the lower chords in the front and back adjacent cargo boom sections are only in extrusion contact through the stress pressing plates and are not connected. According to the inter-section connecting structure, the connection structure that the upper chords and the lower chords between the traditional cargo boom sections are combined through the pin shafts or bolts is changedinto the structure that only the upper chords are connected through the pin shafts and the joints between the lower chords are in extrusion contact only through the stress pressing plates and are notconnected. The inter-section connecting structure has the advantages of being clear in stress, convenient to assemble, simple in structure, convenient to manufacture, safe, reliable, economical and applicable, and can create remarkable economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of hoisting machinery, and more specifically relates to an internode connection structure of a horizontal cantilever boom of a tower crane. Background technique [0002] The boom of the tower crane is placed horizontally, and the hoisting equipment that changes the amplitude by the movement of the lifting trolley suspended on the horizontal boom is called a flat-arm crane, such as construction cranes, various boom-free cables and Flat-top tower crane at the top of the tower. [0003] Compared with the jib crane, the flat-arm crane, especially the flat-head crane, has the advantages of compact structure, light weight, fast luffing speed, and easy installation and disassembly, and is widely used in engineering construction in thermal power, hydropower, metallurgy, mining and other fields and during construction. [0004] The length of the horizontal cantilever jib with no cable and cantilever (mainly used in...

Claims

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Application Information

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IPC IPC(8): B66C23/16B66C23/62
CPCB66C23/16B66C23/62
Inventor 郭志康胡婷孙秋香李芳石小飞谢海建
Owner KERUN ELECTRO MECHANICAL ENG