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crane

A technology for cranes and jibs, which is applied to cranes, load hanging components, transportation and packaging, etc. It can solve the problems of strict return spring requirements and large return force, and achieve the effect of reducing requirements and small return force

Active Publication Date: 2017-05-03
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The inventors have found that there are at least the following problems in the prior art: in the existing arm pin system, the arm pin 1 is placed on the top, and the arm pin 1 needs to overcome its own gravity during the reset process, and the required restoring force is large, which requires the return spring 3 strict

Method used

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Embodiment Construction

[0061] Combine below Figure 6 ~ Figure 13 A more detailed elaboration of the technical solution provided by the present invention, a technical solution obtained by replacing any technical means provided by the present invention or combining any two or more technical means or technical features provided by the present invention with each other All should be within the protection scope of the present invention.

[0062] see Figure 6 ~ Figure 8 , the embodiment of the present invention provides a telescopic boom, including at least two mutually socketed telescopic booms 20; an arm pin structure 21 is arranged between two adjacent telescopic booms 20, and the arm pin structure 21 is located at each The side of telescopic arm 20.

[0063] There are various structural forms of the arm pin structure 21, and existing structures or optional structures given below can be used.

[0064] Different from the scheme of placing the arm pin system on top in the prior art, the telescopic b...

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Abstract

The invention discloses a crane, which relates to the field of engineering machinery and is used for optimizing the structure of the existing telescopic boom. The telescopic boom includes at least two telescopic booms nested in each other; an arm pin structure is arranged between two adjacent telescopic booms, and the boom pin structure is located on the side of each telescopic boom. Different from the scheme of putting the arm pin system up in the prior art, in the telescopic boom provided by the embodiment of the present invention, the arm pin structure is arranged on the side of each telescopic arm, and the arm pin in the arm pin structure is reset. There is basically no need to overcome its own gravity, and the required recovery force is small, which reduces the requirements for the return spring.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a crane. Background technique [0002] The boom is the most important working part of the mobile crane, and the telescopic boom is the most common one, see figure 1 . With the development of ultra-large tonnage cranes to the kiloton class, the hoisting weight of the main arm is continuously increasing, which puts forward higher strength requirements for the arm pin, which is the key stress-bearing component of the main arm when hoisting. In view of the fact that the arm pin has been made of top-grade materials, the strength can only be improved by increasing the diameter of the arm pin. [0003] Box-type telescopic boom: cylindrical structure, the sections are set together, and the sections can move relative to each other. The box-type telescopic boom is the main working part of the telescopic boom crane, also known as "boom", "boom", "main boom", and "telescopic boom". ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/687
CPCB66C13/16B66C23/701B66C23/705B66C23/708
Inventor 曹立峰佟雪峰王小强张庆彬宋昕迪孙凯
Owner XUZHOU HEAVY MASCH CO LTD
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