Jib arm structure of lorry-mounted crane

A truck-mounted crane and crane technology, applied in cranes and other directions, can solve the problems of low production efficiency, unguaranteed product quality, angle deviation, etc., and achieve the effects of reducing labor intensity, product quality assurance, and control cost reduction.

Inactive Publication Date: 2011-04-27
韶关市起重机厂有限责任公司
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Problems solved by technology

This kind of boom structure has great defects for blanking bending, tailor welding, etc.: one is the bending aspect: because the boom of this structure is made of two bent plates welded together , so the requirements for bending accuracy are quite high, and it is impossible for two bent plates to be folded exactly the same, or the deviation in width or angle, the precision is n

Method used

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  • Jib arm structure of lorry-mounted crane
  • Jib arm structure of lorry-mounted crane

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] see figure 1 , a truck-mounted crane boom structure, the steel plate is bent into a crane boom with a polygonal cross section by a bending machine, and the two corresponding short sides 2 at the polygon opening are connected by welding to make the polygon The long side 1 and the short side 2 are connected as a whole.

[0014] In this embodiment, the boom structure of the truck-mounted crane is that the steel plate is bent once by a bending machine into a crane boom with a hexagonal cross-section. The two corresponding short sides 2 at the opening of the hexagon The spaces are connected by welding, so that the long side 1 and the short side 2 of the hexagon are integrated. Weld seam 3 is to use tooling to close the seam mouth, measure and correct the size of each part to be correct, and spot weld firmly.

[0015] The accuracy of the boom of the...

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Abstract

The invention relates to a jib arm structure of a lorry-mounted crane. The jib arm is formed by bending a steel plate into a structure of which the cross section is a polygon in one step by means of a bending machine, wherein two short sides corresponding to an opening of the polygon are connected with each other by welding, so that long sides and the short sides of the polygon are connected into a whole. By using the jib arm having a one-welding seam structure, the invention has the advantages of less possible torsional deformation and more reasonable stressed state. The geometric accuracy of the jib arm can be effectively controlled in the bending process, welding deformation has minimal influence on the structural dimension precision of the jib arm, the product quality control cost is lowered, the product quality is ensured, the production efficiency is improved, and the labor intensity of workers is reduced. Besides, the structural strength of the jib arm is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of hoisting equipment, and relates to a boom structure of a truck-mounted crane that can improve the strength and rigidity of the boom of the truck-mounted crane and reduce the degree of twist. Background technique [0002] Existing booms of truck-mounted cranes all adopt a hexagonal boom structure in cross-section, which is welded by two U-shaped components, and needs to be welded to corresponding two sides, so there are two welds. This kind of boom structure has great defects for blanking bending, tailor welding, etc.: one is the bending aspect: because the boom of this structure is made of two bent plates welded together , so the requirements for bending accuracy are quite high, and it is impossible for two bent plates to be folded exactly the same, or the deviation in width or angle, the precision is not easy to control; the second is tailor welding: due to various deviations The existence of the weldin...

Claims

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Application Information

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IPC IPC(8): B66C23/64
Inventor 谢文牧李国华张一帆李建国
Owner 韶关市起重机厂有限责任公司
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