Multi-main-chord arm support for crane

A main chord and crane technology, applied in the direction of cranes, etc., can solve the problems of structural bearing limit and application scope limitation, and achieve the effect of increasing structural bearing capacity, large structural bearing capacity, and increasing overall stiffness.

Inactive Publication Date: 2011-11-23
SHANGHAI SANY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of boom is that due to the requirements of transportation dimensions, etc., there will be certain restrictions on the width and height of the section of the boom section. Therefore, the above-mentioned boom system also has a structural load limit, and its scope of application is limited limit

Method used

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  • Multi-main-chord arm support for crane
  • Multi-main-chord arm support for crane
  • Multi-main-chord arm support for crane

Examples

Experimental program
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Effect test

Embodiment 1

[0048] see figure 1 , figure 2 , the crane multi-main chord jib of the present invention comprises a lower jib section 14, an intermediate jib section 12, 13 and a jib head 11 connected in sequence;

[0049] In this embodiment, the middle boom sections 12, 13 and the lower boom section 14 are multi-main chord structures, and their cross sections are rectangular. Such as Figure 3 ~ Figure 5 As shown, taking the intermediate boom section 13 as an example, the intermediate boom section 13 is provided with four main chords 131, and at the same time, one main chord is added on the side of the main chord 131 of the rectangular section of the boom section along the height direction of the boom. 131', forming a structure with eight main chords; several webs 132 are arranged between stacked main chords 131, 131' to connect each other to form a rectangular cross-section arm section, thereby forming a spatial structural system.

Embodiment 2

[0051] see Figure 6 ~ Figure 10 , which shows another embodiment of the present invention. The multi-main chord jib of the crane is similar in structure to the jib shown in Embodiment 1. The difference is that the multi-main chord intermediate jib section 13 in this embodiment (taking the intermediate jib section 13 as an example) has a rectangular cross-section, and four main chords 131 are set. A main chord 131 ′ is added in the horizontal direction on both sides, that is, along the width direction of the jib. A number of webs 132 are arranged between each main chord to form a rectangular-section jib section, thereby forming a spatial structural system.

Embodiment 3

[0053] see Figure 11 , Figure 12 , the crane multi-main chord jib of the present invention comprises a lower jib section 14, an intermediate jib section 12, 13 and a jib head 11 connected in sequence;

[0054] In this embodiment, the middle boom sections 12, 13 and the lower boom section 14 are multi-main chord structures, and their cross sections are rectangular. Such as Figure 13 ~ Figure 15As shown, taking the intermediate boom section 13 as an example, the intermediate boom section 13 is provided with four main chords 131, and at the same time, one main chord is added on the side of the main chord 131 of the rectangular section of the boom section along the height direction of the boom. 131', forming a structure with eight main chords; the main chords 131, 131' at different corners are connected by webs 132, and the main chords 131, 131' at the same corner are connected by webs 132' Connected to form a rectangular section of the arm section, thereby forming a spatial...

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Abstract

The invention provides a multi-main-chord arm support for a crane. The multi-main-chord arm support comprises a lower arm section, a middle arm section and an arm head which are connected in sequence, wherein the lower arm section and the middle arm section are multi-main-chord arm sections; each corner part of the cross section of each multi-main-chord arm section is provided with a main chord; the main chords are connected with one another through a plurality of web members; and at least one main chord is additionally arranged on each corner part of the cross section of each multi-main-chord arm section along the width direction or height direction of the multi-main-chord section, and is parallel to the original main chord. In the multi-main-chord arm support for the crane, provided by the invention, the quantity of arm section main chords is increased under the condition that the arm section transportation size is not changed, so that the cross-sectional area of each main chord and the overall rigidity of the arm support are increased, and the structural carrying capacity of the arm support is further increased multiply; and the multi-main-chord arm support is suitable for a large-sized crane.

Description

technical field [0001] The invention relates to a crane arm frame, in particular to a crane multi-main chord arm frame. Background technique [0002] At present, the truss jib of a crane is generally composed of a plurality of jib sections, and the section of the jib section is generally a rectangle or other polygon. There is a main chord at each corner around the cross section of the jib section. The disadvantage of this kind of boom is that due to the requirements of transportation dimensions, etc., there will be certain restrictions on the width and height of the section of the boom section. Therefore, the above-mentioned boom system also has a structural load limit, and its scope of application is limited limit. Contents of the invention [0003] The purpose of the present invention is to provide a multi-main chord jib for a crane, which can increase the cross-sectional area of ​​the main chord and the overall rigidity of the jib by increasing the number of main chord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/70
CPCB66C23/70
Inventor 刘金江李明奇廖建国刘玉泉于国潍孙正茂
Owner SHANGHAI SANY TECH
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