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Combination double bottom hook block

A combined and dual technology, applied in the direction of portable lifting devices, hoisting devices, load hanging components, etc., can solve the problems of reducing the lifting height, increasing the pulley block and lower pulley mechanism of the crane, etc., to save costs and use more effect of possibility

Inactive Publication Date: 2010-09-08
TEREX GLOBAL GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] This often results in high deflection angles, which can only be reduced by increasing the distance between the crane block and the lower pulley mechanism
[0012] This undesirably leads to a reduction in the possible lifting height

Method used

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  • Combination double bottom hook block
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Examples

Experimental program
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Effect test

Embodiment Construction

[0040] FIG. 2 shows the general design of the double lower pulley mechanism 1 , in which the two pulley sets 2 and 3 are connected by a rocker arm 4 . As can be seen from the rope guidance shown, two hoisting ropes 5 and 6 are arranged here. The hoisting hook connected to the rocker arm 4 is denoted by 10 .

[0041] This double lower pulley mechanism is for example designed for loads of 2 x 160 tons.

[0042] As shown in FIG. 1 , if a single pulley block 2 is used to replace the two pulley blocks 2 and 3 , the pulley block must be centrally arranged, and the existing mounting holes 8 can be used for this purpose.

[0043] At this time, the disadvantage is: the load bearing capacity should be halved, that is, to 1×160 tons.

[0044] In the case of using only one hoisting wire rope, the above-mentioned disadvantages can be avoided by the following measures: keep the usual two pulley blocks 2 and 3 on the rocker arm 4, but (as indicated by 7) use the bolts to prevent tilting F...

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PUM

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Abstract

The invention relates to a combination double bottom hook block in which two pulley blocks (2, 3) each with a plurality of pulleys are connected to one another by means of a rocker (1), a load hook being mounted in a pivotable manner on the rocker. If use is made here of two lifting cables, each of these lifting cables is led over a pulley block (2, 3) and, in order to achieve the same loading capability if use is made of just one lifting cable, the latter is led, in addition, over a floating pulley (2) which is mounted between the two pulley blocks (2, 3), the two pulley blocks (2, 3) also being secured against tilting.

Description

technical field [0001] The invention relates to a combined double lower pulley mechanism, wherein two pulley blocks each having a plurality of guide rope pulleys are connected to each other by a rocker arm on which a heavy lifting hook is mounted. Background technique [0002] In the past, crane users had to use a dual lower sheave mechanism for certain load conditions based on various combinations of loads and boom (jib) lengths. [0003] With short boom systems, crane users can of course also work with a hoisting winch. [0004] In the conventional lower pulley mechanism, according to the structure of the usual double lower pulley mechanism, this results in a halving of the load that can be achieved. [0005] If the user wants to lift a load higher than 50% of the rated load on the boom, he must use a larger single lower sheave mechanism, or work with a double lower sheave mechanism. [0006] The double lower pulley mechanism requires two pulley blocks, which have a cert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C1/34B66D3/06
CPCB66C1/34B66D3/06
Inventor H-P·弗兰岑A·伯斯
Owner TEREX GLOBAL GMBH
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