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Profile shape for a crane jib

A technology of crane arms and cranes, which is applied to cranes and other directions, and can solve problems such as expensive crane arms and unfavorable force introduction

Active Publication Date: 2010-09-08
PALFINGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A disadvantage of the jib is that, in particular when being inserted into the jib system, unfavorable force introductions occur in the upper region of the jib
Furthermore it is relatively expensive to manufacture such a jib

Method used

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  • Profile shape for a crane jib
  • Profile shape for a crane jib
  • Profile shape for a crane jib

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] It should be noted at the outset that all drawings are to scale to the extent that the lengths of the various profile segments and the angles shown are shown in relatively correct relationship. All angle specifications refer to degrees such that a full angle equals 360°. An acute angle is understood to be an angle which is less than 1 / 4 full angle. An obtuse angle is understood to be an angle greater than 1 / 4 and less than 1 / 2 of the full angle. An angle equal to 1 / 4 of a full angle is called a right angle.

[0023] Figure 1a A first embodiment of the imaginary contour curve of the crane jib in the transverse plane of the jib is shown. A transverse plane is here understood to be a plane which is traversed orthogonally by the longitudinal axis of the jib. All crane jibs according to the invention have an axis of symmetry s arranged in a transverse plane, with respect to which axis of symmetry the contour of the jib runs at least approximately mirror-symmetrically in...

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PUM

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Abstract

The invention relates to a crane jib for a crane, having a longitudinal axis and an imaginary contour line that extends in a transversal plane relative to an axis of symmetry (s) in an at least approximately mirror-symmetric manner and that is straight in at least some sections thereof, the contour line intersecting the axis of symmetry (s) in a first and a second point of intersection (S1, S2) and tapering in the direction of the second point of intersection (S2) at least before the last third of the distance (D) between the first and the second point of intersection (S1, S2), the tapered section of the contour line extending up to the second point of intersection (S2) and ending in a rounded-off section (1) on the bisecting line (s).

Description

technical field [0001] The invention relates to a crane jib for a crane, comprising a longitudinal axis and an imaginary contour line extending at least approximately mirror-symmetrically with respect to the axis of symmetry in a transverse plane and formed rectilinear at least in sections, the contour line being in the first and The second point of intersection intersects the axis of symmetry and tapers towards the second point of intersection at least before the last third of the distance between the first and second points of intersection. Background technique [0002] Such a crane jib is shown, for example, in Figure 13 of EP 583552 B1. [0003] A disadvantage of the jib is that, in particular during insertion into the jib system, unfavorable force introductions occur in the upper region of the jib. Furthermore, such a jib is relatively expensive to manufacture. Contents of the invention [0004] The object of the present invention is to eliminate the above-mentioned...

Claims

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Application Information

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IPC IPC(8): B66C23/687
CPCB66C23/701
Inventor E·温默
Owner PALFINGER