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Locking system for telescopic crane boom with displaceable locking unit

A mobile crane and locking system technology, applied in cranes and other directions, can solve the problems of loss of total extension, total arm length loss, excessive overlap, etc., and achieve the effect of saving length, overall optimization, and reducing total weight

Active Publication Date: 2010-07-28
MANITOWOC CRANE GROUP FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the known systems of the prior art, for each telescoping part, the telescoping cylinder together with the locking mechanism has to be withdrawn by a certain distance, thus losing part of its total extension
As a result, the front telescopic parts cannot be pulled out to the same extent as the rear telescopic parts, resulting in a margin of the total stroke of the telescopic cylinder
This leads to an unnecessarily large overlap of the front telescopic parts in the withdrawn state, with an associated loss in terms of the overall arm length

Method used

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  • Locking system for telescopic crane boom with displaceable locking unit
  • Locking system for telescopic crane boom with displaceable locking unit
  • Locking system for telescopic crane boom with displaceable locking unit

Examples

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Embodiment Construction

[0014] First refer to figure 1 An example of one embodiment of the present invention is explained in detail. The schematic longitudinal section shows a telescopic arm comprising a main body 11 and four extractable telescopic parts 1 to 4 . The telescopic cylinder 10 is placed in the main body 11 . A locking mechanism 21 comprising a cylindrical second stage 6 and a cylinder lock 5 extends on the cylindrical housing of the telescoping cylinder 10 . A cylindrical second stage 6 is arranged around an outer tube 8 of a telescopic cylinder 10 shown separately. Placed on the telescopic cylinder 10 is also an operating device 7 for a structural steel lock 9 which locks the telescopic components to each other when they are in working mode.

[0015] In such an embodiment, the especially automatic expansion mode of the telescopic system is based on the sequence described below.

[0016] Initially, all telescoping members 1 to 4 are retracted and locked to each other (structural stee...

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Abstract

The invention relates to a locking system for a telescopic crane jib, in particular for a mobile crane, in which a lock is established between a telescoping cylinder (10, 20) and a telescopic part (1-4) by means of a locking unit (21) in order to extract and retract the telescopic parts, and the locking unit (21) is disposed on the telescoping cylinder (10, 20) in such a way that it can be moved longitudinally.

Description

technical field [0001] The invention relates to a locking system for a telescopic boom of a crane, in particular for a mobile crane. [0002] As a device for moving multiple telescopic parts, this crane and telescopic jib is equipped with a telescopic cylinder with a locking mechanism. The locking mechanism is used to form a lock between the telescopic cylinder and one of the telescopic parts to be extended or retracted. Background technique [0003] The invention relates to a telescopic arm which is extracted and locked by means of a telescopic cylinder. Modern mobile cranes are used to lift larger and larger loads and to higher heights. Users also require efficient mobile cranes with as little deadweight as possible to save logistical costs. Efforts have also been made to develop a mobile crane capable of handling as large a load as possible on as few axes as possible within the permissible axial loads, in order to obtain greater flexibility on the one hand and reduce t...

Claims

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Application Information

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IPC IPC(8): B66C23/687
CPCB66C23/705B66C23/708
Inventor J·许尔曼D·施图尔沃尔德特
Owner MANITOWOC CRANE GROUP FRANCE
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