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Composite telescopic crane jib with metal guide blocks and crane comprising said jib

A telescopic boom and guide block technology, applied in the field of cranes and telescopic booms, can solve the problems that the guide blocks and sliders cannot provide any contribution, cannot guarantee the optimal distribution and support of lateral loads, and achieve the effect of reducing the overall weight

Inactive Publication Date: 2015-10-07
CIFA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, also in this solution, the guide shoes and slides do not make any contribution in terms of the mechanical resistance to the lifted heavy loads, and they do not guarantee an optimal distribution and support of the transverse loads acting on the segments

Method used

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  • Composite telescopic crane jib with metal guide blocks and crane comprising said jib
  • Composite telescopic crane jib with metal guide blocks and crane comprising said jib
  • Composite telescopic crane jib with metal guide blocks and crane comprising said jib

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Embodiment Construction

[0068] With reference to the accompanying drawings, a telescopic jib according to the invention is indicated with numeral 10 and can be used in a crane for lifting loads (only in figure 1 shown schematically in ), for example in the field of architecture or construction.

[0069] The telescoping arm 10 includes a plurality of sections 12, 14, 16, one of which slides within the other, which can be extended linearly to assume an extended operating state, or a non-operating state or when the machine is stopped. Retract within the other, or assume an intermediate position between the two extreme positions.

[0070] The segments 12, 14, 16 have a box-like cross-section, inside which are provided respective axial positioning seats 25, 27 to accommodate the segments in their retracted positions.

[0071] The segments 12, 14, 16 are shaped and dimensioned to co-operate with the reciprocating portion so as to be able to be inserted axially into the respective axially locating bases 25...

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PUM

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Abstract

A telescopic arm for cranes able to lift a load comprises a plurality of tubular segments (12, 14, 16) which can be extended with respect to each other. At least one of said segments (12, 14, 16) is made of a composite material. The arm comprises longitudinal guide means (45) disposed between said at least one segment (12, 14, 16) and at least another segment (12, 14, 16) associated consecutively and cooperating directly in extension, outside or inside, of said at least one segment (12, 14, 16), the guide means (45) being at least partly drowned in the composite material in corresponding internal surfaces (37) of said at least one segment (12, 14, 16) and external surfaces (36, 38) of said other segment (12, 14, 16) to guide the reciprocal sliding thereof.

Description

technical field [0001] The invention relates to a telescopic boom for a crane and a crane comprising said boom. Background technique [0002] As we all know, a crane is a work vehicle used to lift heavy loads (in the several ton range), usually consisting of a truck on which is mounted a telescopic boom consisting of movable sections, one of which can reciprocate within another slide. A hook or other lifting device is provided at the upper end of the wall to lift the load. [0003] The arm can be angularly oriented and telescopically lengthened to carry a hook or other lifting device to a desired distance and height. [0004] Usually the telescoping segments are made of metallic material, usually steel, and have a tubular shape with a cross-section of different shapes, for example rectangular, rectangular with rounded bottom, hexagonal or others. The end of each segment has a band-shaped reinforcing element which also acts as a stop in the inoperative position. [0005] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/70
CPCB66C23/707
Inventor 莫罗·马可·科特里尼斯特凡诺·费雷保罗·达里奥·迈尼
Owner CIFA
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