EP0779237B1 - Mobile crane with an overload protection device - Google Patents

Mobile crane with an overload protection device Download PDF

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Publication number
EP0779237B1
EP0779237B1 EP96118130A EP96118130A EP0779237B1 EP 0779237 B1 EP0779237 B1 EP 0779237B1 EP 96118130 A EP96118130 A EP 96118130A EP 96118130 A EP96118130 A EP 96118130A EP 0779237 B1 EP0779237 B1 EP 0779237B1
Authority
EP
European Patent Office
Prior art keywords
jib
angle
outriggers
overload protection
protection device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96118130A
Other languages
German (de)
French (fr)
Other versions
EP0779237A2 (en
EP0779237A3 (en
Inventor
Peter Abel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE29519928U priority Critical
Priority to DE29519928U priority patent/DE29519928U1/en
Application filed by Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Publication of EP0779237A2 publication Critical patent/EP0779237A2/en
Publication of EP0779237A3 publication Critical patent/EP0779237A3/en
Application granted granted Critical
Publication of EP0779237B1 publication Critical patent/EP0779237B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88Safety gear
    • B66C23/90Devices for indicating or limiting lifting moment

Description

The invention relates to a crane vehicle with an overload protection device, with a boom articulated to its superstructure, preferably telescopic boom by one on this and the rocker arm articulated to the superstructure can be rocked with the opposite end regions of the long sides of the Extendable sliding rails arranged under the car their ends are provided with extendable support feet, and with a device measuring the angle of rotation of the boom, the Signals from a processing device of the overload protection device are supplied, in which the overload protection device generates a warning signal and / or stops crane operation, when the crane hits its stability-threatening limits or exceeds.

The stability of a crane vehicle with a telescopic boom depends on the size of the load hanging on the telescopic boom among other things from the luffing angle, the extension length of the telescopic boom, from the deflection of the telescopic boom and in particular also from the angle of rotation of the superstructure with telescopic boom to the undercarriage and that through the support feet of the sliding spars defined stand square. Related to that by the extended The sliding pillars and support feet are defined as a square the safety of the crane is greatest when the boom is heading of the most extended sliding beam. When retracted Sliding bars with extended support feet ensure stability in Longitudinal direction of the undercarriage is greater than in the direction of its transverse axis. The Overload protection must therefore always include the extension status of the sliding struts take into account what is problematic in that the stability is also changes with different extension lengths of the individual sliding beams.

A crane is known from EP 0 420 625 A2, in which a safety device various parameters of the crane such as boom position, load and position the supports detected, a work area for the crane depending on the detected Presets parameters and stops the crane if it limits the working area reached. Here, the boundaries of the work area for everyone certain load determined as a function of the angle of rotation of the boom Make the best use of the stability of the crane. This takes into account how strong the crane boom rotates when it reaches the working area limits can be braked without the strength of the boom endangered or the load begins to rock.

The object of the invention is to a crane vehicle of the type specified create, in which the overload protection device in simple and reliable Way takes into account the different extension lengths of the sliding beams.

According to the invention, this object is achieved by a crane vehicle according to the patent claim 1 solved. Preferred embodiments of the invention are the subject of further claims.

It is therefore one that detects the extension state or the extension length of the sliding struts Monitoring device provided that the respective extension length signals of the overload protection device corresponding to the individual sliding beams feeds, the processing device of the overload protection device from the signals of the monitoring device for the extension length of the Crossbars and from the signals of the measuring the angle of rotation of the boom Device for every angle of rotation of the boom resulting from the extended state the stability of the stand quadrant resulting in the sliding struts. The of the rotation angle measuring device and the monitoring device of the Sliding bars according to the angle of rotation or the extension lengths of the sliding bars generated signals are from the processing device, the one Microcomputer contains, by comparison with the others determining the stability Processed values, the overload protection device a Crane operation stopping signal generated when the crane jeopardizes its stability Approaches or crosses borders.

In order to be able to reduce the computing power of the processing unit, it is provided that that the 360 ° rotation angle of the boom in several rotation angle ranges is divided and that for each of these rotation angle ranges in this area located booms which result from the extension lengths of the sliding beams Stability values are stored in a table (bit map) from which the Processing unit according to the measured extension lengths of the sliding beams reads out the current stability values of the stand rectangle.

In the crane vehicle it can be provided that each sliding beam only three Support positions in which it is bolted, namely once a retracted Position in which the support leg is in the area of the long side of the undercarriage a middle position and a fully extended position. Become when calculating the stability for each of the four sliding beams only Taking these three support positions into account, the safety values for everyone the areas in a clear table.

The computing work of the processing device can thereby be reduced even further, that the 360 ° angle of rotation of the boom to determine the stability values of the standing square is divided into four quadrants. For each of these four quadrants are the stability values for all possible extension lengths the sliding spars stored in such a way that for the entire quadrant are valid for these applicable smallest values.

According to a particularly preferred embodiment of the invention, that from the measured values of the angle of rotation of the boom and the extension lengths the sliding struts the angular ranges in the safety range be determined in which the boom with a given load up to a given smallest luffing angle of the boom can be rotated. To In this embodiment, variable angular ranges are defined, in which the boom with the hanging on it Load can be turned safely. It is for each of these Angular ranges from the smallest rocking angle, the is permissible in this angular range. Also by this definition variable angle ranges will simplify the Bill created because not for every angle of the boom the permissible safety values must be taken into account.

The sliding spars are expedient for each extended state determined four angular ranges, the limits of which are expedient through from the axis of rotation of the boom to the the support feet load-bearing ends of the sliding beams are drawn lines become.

When the boom turns, it approaches the limit of an angular range to which an angular range with a smaller one permissible load, the stop signal is given.

The reduction in the angular ranges has the advantage that the Crane operators need not fear in larger angular ranges, Approach an angular limit at which the overload safety device responds. However, the choice of larger angular ranges leads to that the higher loads, which are permissible in certain areas, for example by swiveling the boom to smaller ones Rocker angle, can not be used.

An embodiment of the invention is explained below with reference to the drawing. In this shows

Fig. 1
2 shows a plan view of the undercarriage of a crane vehicle with sliding rails extended to different extents,
Fig. 2
1 corresponding plan view of an undercarriage with retracted sliding beams and
Fig. 3
1 corresponding plan view of an undercarriage, in which the sliding bars on the right side are extended and the sliding bars on the left side are retracted.

1 schematically shows an undercarriage 1 of a crane vehicle can be seen from the sliding spars 2 extended to different extents are at their ends support feet 3, by Hydraulic cylinder at right angles to the sliding bars in a vertical direction Are extendable towards the floor. To extend the Support spindles can also be provided. The Sliding beams 2 are located in the end areas of the two Long sides of the undercarriage 1 and are perpendicular to it Extendable median longitudinal plane.

In the illustrated embodiment, the sliding beams can be Extend in three stages, each in their Guides must be bolted. These levels correspond to one retracted position in which the support lengths of the sliding beams are smallest, a middle position and an extended position Position in which the support length is greatest.

In the embodiment of FIG. 1, the two are Sliding bars 2 of the left side in their middle position, the upper sliding beam on the right in its most extended position Position and the sliding beam at the bottom right in its retracted position Position. From this extension pattern of the sliding struts and the resulting support lengths result in a Stand square that varies over the angle of rotation of the boom is able to absorb large luffing forces.

Four angular ranges have been defined in the standing square, which come from the axis of rotation 4 of the boom to the ends the sliding spars 2 or through the support lines of the support feet 3 drawn lines result. These are angular ranges for everyone certain permissible cantilever moments have been determined, their different Size by the radius of the angular ranges spanning arc is indicated. It is for everyone Angular range for the sake of simplicity a uniform permissible Boom moment defines the largest permitted boom moment for this angular range.

Due to the different extension lengths of the sliding beams resulting different four-angle ranges as well as the largest allowable cantilever moments for each of these angular ranges are stored in a payload table from which these values are used Processing in the processing unit with the overload protection device can be read out.

From Fig. 2 the state of the sliding beams can be seen, the arises after entering them. From Fig. 2 it follows that the Stability in the transverse direction of the undercarriage is much less is as in its longitudinal direction in which the stability is exactly the same size as when the sliding spars are extended, however only over a smaller angular range.

3 shows the state in which the sliding beams the right side fully extended and the left side are retracted. This results in a relatively large angular range, in which the boom symbolized by arrow 5 can be turned freely with a large permissible tilting moment can.

Claims (4)

  1. Crane vehicle with an overload protection device, having a jib (5) linked to its revolving superstructure, preferably a telescopic jib, which can be luffed by a luffing cylinder linked to the telescopic jib and the revolving superstructure, having extendable outriggers (2) which are arranged on the opposite end regions of the longitudinal sides of the travel unit (1) and are provided with extendable outrigger bases (3) at their ends, and having a device which measures the rotational angle of the jib and the signals of which are fed to a processing unit of the overload protection device, in which the overload protection device produces a warning signal and/or stops the crane operation if the crane approaches or exceeds limits which put its stability at risk, a monitoring device which detects the extension state or the extension length of the outriggers being provided, this monitoring device feeding signals corresponding to the respective extension length of the individual outriggers to the overload protection device, the processing unit of the overload protection device, from the signals of the monitoring device for the extension length of the outriggers and from the signals of the device which measures the rotational angle of the jib, determining the stability of the parking rectangle for each angle of rotation of the jib, this stability resulting from the extension state of the outriggers, and the 360° rotational angle of the jib being subdivided into a plurality of rotational-angle ranges, characterized in that, for each of these rotational-angle ranges, a uniform admissible jib moment which corresponds to the maximum admissible jib moment for this angle range is filed in a table (bit map), from which these values can be read out for processing in the processing unit.
  2. Crane vehicle according to Claim 1, characterized in that the 360° rotational angle of the jib (5) is subdivided into four quadrants for determining the stability values of the parking rectangle.
  3. Crane vehicle according to Claim 1, characterized in that the angle ranges which lie within the safety range and within which the jib (5) can be rotated at a predetermined load up to a predetermined minimum luffing angle of the jib (or at a maximum permissible moment) are determined from the measured values of the rotational angle of the jib (5) and the extension lengths of the outriggers (2).
  4. Crane vehicle according to Claim 3, characterized in that four angle ranges are formed for each extension state of the outriggers (2), the limits of which angle ranges consist of the lines drawn from the axis of rotation of the jib (5) to those ends of the outriggers (2) which carry the outrigger bases (3).
EP96118130A 1995-12-15 1996-11-12 Mobile crane with an overload protection device Expired - Lifetime EP0779237B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE29519928U 1995-12-15
DE29519928U DE29519928U1 (en) 1995-12-15 1995-12-15 Crane vehicle with an overload safety device

Publications (3)

Publication Number Publication Date
EP0779237A2 EP0779237A2 (en) 1997-06-18
EP0779237A3 EP0779237A3 (en) 1997-07-09
EP0779237B1 true EP0779237B1 (en) 2001-10-10

Family

ID=8016782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118130A Expired - Lifetime EP0779237B1 (en) 1995-12-15 1996-11-12 Mobile crane with an overload protection device

Country Status (5)

Country Link
US (1) US5887735A (en)
EP (1) EP0779237B1 (en)
JP (1) JPH09175785A (en)
KR (1) KR100427506B1 (en)
DE (2) DE29519928U1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006017724U1 (en) * 2006-11-21 2008-04-03 Liebherr-Werk Ehingen Gmbh mobile crane
CN103043581A (en) * 2012-12-21 2013-04-17 三一重工股份有限公司 Turntable limiting device, turntable limiting device and engineering machinery
DE102011119654A1 (en) 2011-11-29 2013-05-29 Liebherr-Werk Ehingen Gmbh Mobile work machine, in particular vehicle crane
CN109592567A (en) * 2018-12-10 2019-04-09 中联重科股份有限公司 Control system, method and engineering machinery for engineering machinery

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6269635B1 (en) 1999-01-20 2001-08-07 Manitowoc Crane Group, Inc. Control and hydraulic system for a liftcrane
JP3683571B2 (en) * 2003-04-10 2005-08-17 古河機械金属株式会社 Crane overturn prevention device
DE202005013310U1 (en) * 2005-08-23 2007-01-04 Liebherr-Hydraulikbagger Gmbh Overload warning device for excavators
US7525276B2 (en) * 2005-09-13 2009-04-28 Romer, Inc. Vehicle having an articulator
DE102006031257A1 (en) * 2006-07-06 2008-01-10 Putzmeister Ag Truck-mounted concrete pump with articulated mast
DE102008055625A1 (en) * 2008-11-03 2010-05-06 Putzmeister Concrete Pumps Gmbh Mobile working machine with support arms
CN101746675B (en) * 2009-12-31 2012-05-02 三一汽车制造有限公司 Crane super lifting device, control system and control method thereof
DE102010056584B4 (en) 2010-12-30 2018-03-29 Asm Automation Sensorik Messtechnik Gmbh Mobile work machine
AT511234B1 (en) * 2011-04-08 2013-05-15 Palfinger Ag Stand safety monitoring of a loading crane mounted on a vehicle
AT13517U1 (en) * 2012-10-19 2014-02-15 Palfinger Ag Safety device for a crane
DE102013201860A1 (en) * 2013-02-05 2014-08-07 Terex Cranes Germany Gmbh Method for influencing a cable winch force acting on a cable drive and apparatus for carrying out such a method
FR3002799B1 (en) * 2013-03-01 2015-07-31 Haulotte Group Effort measurement cell for an elevator boom and an elevator nacelle comprising such a cell
DE102014008117A1 (en) * 2014-06-03 2015-12-03 Liebherr-Werk Ehingen Gmbh Mobile work machine with support and extension for broadening the support base
IT201700037143A1 (en) * 2017-04-05 2018-10-05 Jacques Tranchero Crane with sectoral anti-tilt system
CN108892038A (en) * 2018-06-07 2018-11-27 河南华电工控技术有限公司 A kind of hoisting machinery long distance wireless security monitoring management system

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DE2230840C2 (en) * 1972-06-23 1982-05-06 Carl Metz Gmbh, 7500 Karlsruhe, De
FR2501390B1 (en) * 1981-03-05 1984-06-22 Camiva
DE3420596C2 (en) * 1984-06-01 1986-10-02 Dr.-Ing. Ludwig Pietzsch Gmbh & Co, 7505 Ettlingen, De
DE3605462A1 (en) * 1986-02-24 1987-08-27 Mo N Proizv Ob Str Dorozh Mash continued safe operation of self-propelled boom cranes and system for carrying out the same method for securing
US4833615A (en) * 1986-10-15 1989-05-23 A.G.A. Credit System for the protection of an aerial device having a pivotable boom
JPH085623B2 (en) * 1989-09-27 1996-01-24 株式会社神戸製鋼所 Safety device of a crane
JP2564060B2 (en) * 1991-10-24 1996-12-18 株式会社神戸製鋼所 Safety system for a construction machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006017724U1 (en) * 2006-11-21 2008-04-03 Liebherr-Werk Ehingen Gmbh mobile crane
EP1925585A1 (en) 2006-11-21 2008-05-28 Liebherr-Werk Ehingen GmbH Mobile crane
DE102011119654A1 (en) 2011-11-29 2013-05-29 Liebherr-Werk Ehingen Gmbh Mobile work machine, in particular vehicle crane
DE102011119654B4 (en) * 2011-11-29 2015-11-12 Liebherr-Werk Ehingen Gmbh Mobile work machine, in particular vehicle crane
CN103043581A (en) * 2012-12-21 2013-04-17 三一重工股份有限公司 Turntable limiting device, turntable limiting device and engineering machinery
CN103043581B (en) * 2012-12-21 2016-04-06 三一重工股份有限公司 A kind of turntable inhibiting device, method and construction machinery and equipment
CN109592567A (en) * 2018-12-10 2019-04-09 中联重科股份有限公司 Control system, method and engineering machinery for engineering machinery

Also Published As

Publication number Publication date
DE59607876D1 (en) 2001-11-15
JPH09175785A (en) 1997-07-08
US5887735A (en) 1999-03-30
EP0779237A2 (en) 1997-06-18
KR970042227A (en) 1997-07-24
KR100427506B1 (en) 2004-07-14
DE29519928U1 (en) 1996-04-04
EP0779237A3 (en) 1997-07-09

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