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Boom systems for mobile cranes and mobile cranes

A crane and cantilever technology, applied in the field of cantilever systems of mobile cranes, can solve problems such as affecting the maximum length of a telescopic cantilever, and achieve the effects of improving connection rigidity, reducing load, and reducing load

Active Publication Date: 2020-09-22
LIEBHERR WERK EHINGEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this variant, the maximum length of the telescopic boom is affected

Method used

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  • Boom systems for mobile cranes and mobile cranes
  • Boom systems for mobile cranes and mobile cranes
  • Boom systems for mobile cranes and mobile cranes

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0036] figure 1The boom system according to the invention is shown in side view and plan view. The cantilever system consists of a telescopic main cantilever 10 and a pointed cantilever in the form of a pivotable truss-like tip 20 fastened thereto by means of bolts. The telescopic jib 10 consists of a total of seven telescopic tube eyelets 11, 12, 13, 14, 15, 16, 17, which are usually mutually supported alternately via support elements. These support elements are fastened from the inside to rims 18 of the telescopic tube eyelets 11 to 17 arranged on the end faces. This telescoping process is carried out by telescoping cylinders, not shown.

[0037] exist image 3 The connection position in the region X between the pointed cantilever 20 and the main cantilever 10 is shown in . It can be seen that the central telescopic tube eye 11 has a roller tip 30 on the end side, to which end the pointed suspension 20 is fastened by means of a four-point screw.

[0038] According to th...

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Abstract

The invention relates to a boom system for a crane, in particular a mobile crane, comprising at least one telescopic main boom and at least one fly jib that can be bolted to a telescopic length of the main boom. When retracted, the telescopic length receiving the fly jib can be bolted to at least one surrounding telescopic length.

Description

technical field [0001] The invention relates to a jib system for cranes, in particular mobile cranes, having at least one telescopic main jib and at least one pointed jib which can be screwed to a telescopic tube eye of the main jib. Background technique [0002] Often very high travel heights and dump heights are required which exceed the effective range of conventional telescopic cranes. Due to possible interfering edges at the location of use, the pointed jib is in this case mounted on a telescopic jib in order to be able to achieve very long lengths which can far exceed the length of the main jib. Such a pointed cantilever can consist of an oscillating tip or a fixed tip. [0003] The maximum possible load of the cantilever system (including the pointed cantilever) is usually limited by the profile of the telescoping tube eye which accommodates the pointed cantilever. The pointed cantilever is usually mounted on the center telescopic tube eyelet. The pointed jib here ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/687B66C23/70
CPCB66C23/66B66C23/702B66C23/708
Inventor 汉斯-迪特尔·维利姆约阿希姆·亨克尔诺贝特·洛伊策
Owner LIEBHERR WERK EHINGEN
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