Traction rod for bracing a crane jib
AssigneeVallourec Deutschland GmbH
InventorThomas Müller
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Abstract
The invention relates to a traction rod for bracing a crane jib, comprising a metallic tubular body and coupling elements which are connected to both ends thereof in an articulated connection of the traction rods among each other by means of bolts. According to the invention, the tubular body and the coupling elements can be detachably connected to each other, dispensing the need for a bonded connection, wherein the region of the connection is dimensioned in such a manner and is low on notch effects that, by calculation, the entire load capacity of the tube cross-section can be exploited with respect to a highest possible fatigue strength.
Claims7
An articulated connection of a first traction rod to a second traction rod for bracing a crane jib, each of the first and second traction rods comprising:
- a metallic tubular body having a longitudinal extent and a tube cross-section and at least one end with a wall thickening, wherein an outside diameter of the wall thickening is greater than an outside diameter of the tube cross section and a transition region from the tubular body to the wall thickening is unitary and constructed to be free of projections and low on notch effects, and
- a coupling element detachably connected to the at least one end of each metallic tubular body of the first and second traction rods in absence of a material connection therebetween, with the coupling element of the first traction rod constructed for articulated connection to the coupling element of the second traction rod with a bolt extending transversely through openings in both the coupling element of the first traction rod and the coupling element of the second traction rod,
- wherein the at least one end with the wall thickening is dimensioned such that a fatigue strength corresponds to a calculated full load capacity of the tube cross-section.
Dependencies are inferred from the claim text.