EP1319629A1 - Flèche télescopique avec alimentation de lubrifiant - Google Patents

Flèche télescopique avec alimentation de lubrifiant Download PDF

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Publication number
EP1319629A1
EP1319629A1 EP02090383A EP02090383A EP1319629A1 EP 1319629 A1 EP1319629 A1 EP 1319629A1 EP 02090383 A EP02090383 A EP 02090383A EP 02090383 A EP02090383 A EP 02090383A EP 1319629 A1 EP1319629 A1 EP 1319629A1
Authority
EP
European Patent Office
Prior art keywords
telescopic
lubricant
valve
comprehensive
telescopic boom
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.)
Granted
Application number
EP02090383A
Other languages
German (de)
English (en)
Other versions
EP1319629B1 (fr
Inventor
Bernd Backes
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.)
Terex Demag GmbH and Co KG
Original Assignee
Demag Mobile Cranes GmbH and Co KG
Terex Demag GmbH and Co KG
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
Application filed by Demag Mobile Cranes GmbH and Co KG, Terex Demag GmbH and Co KG filed Critical Demag Mobile Cranes GmbH and Co KG
Publication of EP1319629A1 publication Critical patent/EP1319629A1/fr
Application granted granted Critical
Publication of EP1319629B1 publication Critical patent/EP1319629B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes 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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs

Definitions

  • the invention relates to a telescopic boom, in particular for a mobile crane is suitable, with a basic box and several telescopic sections that can be telescoped according to the preamble of claim 1.
  • Telescopic booms of the generic type have been known for many years. she consist of a basic box in which one or more telescopic Telescopic shots are coaxially stored one inside the other.
  • the telescopic shots are often referred to as inner boxes. These are about plain bearings that are in the Head area of the next largest inner box or the basic box are arranged, slidably guided.
  • a telescopic shot of the cross section The next smaller telescopic shot is also used as a comprehensive telescopic shot designated, while the one taken by the larger telescopic shot Telescopic shot is also referred to as a covered telescopic shot or inner box.
  • the object of the present invention is a generic telescopic boom to further develop that reliable lubrication without much manual Effort is made possible.
  • the construction effort required for this should be as low as possible.
  • the basic idea of the present invention is that the Lubricant supply for the various plain bearing points of a telescopic boom a single pressure line for the lubricant can be made on elaborate pipe connections using hoses or other flexible pipes is waived. Instead, precautions are taken that are fluid-technical Connection between lubricant distributors, each in the head area of the individual Comprehensive telescopic shots are arranged to ensure one another when the Telescopic shots are in the telescoped state. This ensures that in each case only the innermost of all not yet extended comprehensive Telescopic shots are pressurized with the lubricant so that for everyone sufficient telescopic shot ensures sufficient lubricant pressure can be.
  • the invention provides that - with the exception of the last one comprehensive telescopic section - in the head area of the comprehensive telescopic section at least one lubricant distributor is arranged on the outside, on the one hand via a first shut-off valve with a lubricant channel of the respective telescopic section is connected and on the other hand via a fully telescoped state of the next smaller telescopic shot (included telescopic shot) closed line coupling with the lubricant distributor of the included Telescopic shot is in fluid communication with respect to the lubricant. It is first shut-off valve of a comprehensive telescopic section each in telescoped Condition of the included telescopic shot closed and in the telescoped Condition of the included telescopic shot opened.
  • the Lubricant distributors are each provided with a second shut-off valve, which immediately before the respective line coupling to the next telescopic shot is arranged and closed when the line coupling is open and when closed Line coupling is open.
  • the innermost telescopic shot (innermost inner box), which itself no longer includes another telescopic shot, of course does not need its own lubricant distributor, since the lubricant through the inner box that surrounds it.
  • the lubricant distributor this in the order of the last comprehensive inner box is only on the outlet side Lubricant channel of this comprehensive inner box open.
  • the lubricant distributor of the basic box of the Telescopic boom which is the first lubricant distributor in the order, not fed by another neighboring lubricant distributor, but is connected to one Pressure line connected to supply lubricants.
  • the condition of the telescopic boom is that supplied through this pressure line Lubricant first up to the last lubricant distributor in the order transported before it through its lubricant channel on the sliding surface of the respective Slide bearing can leak.
  • the lubricant distributors each have a non-return valve for the To provide lubricant so that the lubricant when telescoping a Telescopic shot after decoupling from an immediately preceding one Lubricant distributor cannot escape inadvertently.
  • the invention provides that the Lubricant distributors each have a housing that can be filled with lubricant Area of a reinforcing collar of a telescopic section is arranged, with part of the line coupling to the next at the end of the telescopic section Telescopic shot is arranged.
  • the Enabling lubricant distributors is of course the opposite A corresponding end face of the housing of the lubricant distributor Cable coupling provided for the connection to the previous telescopic section.
  • the exception is, of course, the basic set, which is not a previous one Telescope shot has more and is connected to the lubricant pressure line.
  • a lubricant distributor Telescopic shot with the lubricant distributors of the comprehensive Telescopic shot and the telescopic shot included by this a valve cartridge provided the housing of the lubricant distributor in the direction of the longitudinal axis of the telescopic boom.
  • a valve cartridge can be designed as a screw-in cartridge, ie with a External thread are provided with a corresponding internal thread in the The housing of the lubricant distributor corresponds.
  • Telescopic shots are cascade-tight in the individual valve cartridges Arranged one behind the other, that is, they are in fluid technology with one another Connection.
  • valve cartridges preferably have essentially one hollow cylindrical housing, with in the end faces of the housing Valve cartridges each have at least one opening arranged on the inside each can be closed by a membrane or another seal, which by a compression spring is pressed into its closed position.
  • a membrane or another seal which by a compression spring is pressed into its closed position.
  • In the cylindrical jacket of the Housing of the valve cartridges is at least one opening for the passage of the Lubricant from the valve cartridge into the housing of the lubricant distributor arranged.
  • This opening in the casing of the housing is advantageously through a can be closed with the pressure spring of the valve cartridge loaded piston one end is slidably guided in the housing of the valve cartridge and a piston rod has that penetrates this end face of the housing and the tight Valve cartridge to an axially adjacent valve cartridge via the closing piston Slides opening in the jacket, so it closes and at the same time the seal of the at least one opening on the front side lifts off, so that this lubricant distributor then does not deliver any lubricant to the plain bearing assigned to it, but only that Lubricant to the next lubricant distributor through the opening in the Forwarding.
  • an electronic one Control provided depending on the scope of use and / or Stage of use of the telescopic boom, the temporary supply of lubricant in causes the pressure line to the basic box. So that means, for example after a certain operating time or number of telescopic operations or at with every new telescopic procedure at the beginning of the telescopic one Lubricant supply can be arranged without manual intervention requirement. The time required for lubrication does not have to be the same as for a manual lubrication from the available operating time of the Telescopic boom are pulled off, but the lubrication takes place in optimally at the same time as the normal telescoping process.
  • Fig. 1 shows a telescopic boom 1, the basic box 2 and several has telescoping shots, one for simplicity only the inner box 3 is shown.
  • This telescopic boom can with its Foot area (left end), for example, articulated on the superstructure of a mobile crane become.
  • the individual telescopic sections 3 are e.g. by means of a not shown hydraulic telescopic cylinder, which is mechanically connected to the individual shots 3 can be coupled and uncoupled from a retracted Position (transport position) can be moved into its working position (extended position) and rigidly interconnectable via bolting systems, not shown.
  • Telescopic sections 3 comprising telescopic sections are slide bearings 7 on the inside arranged, which are not visible here, but from FIG. 6 explained below are removable.
  • At least one lubricant distributor 10, 10a, 10b arranged by a Lubricant channel not shown through the wall of the respective Telescopic section 2, 3 can promote lubricant to the sliding surfaces of the sliding bearing 7.
  • the principle of the supply of lubricants to the individual according to the invention Telescopic shots can be explained in more detail using the schematic illustration in FIG. 2 become.
  • the partial figure 2a shows the switching state of the lubricant distribution system in FIG a stage in which all extendable telescopic shots 3, 4 of the Telescopic boom are in the retracted position (transport position).
  • the units of the Lubricant distributors 10a are each indicated by dashed lines.
  • the for Basic box 2 belonging lubricant distributor 10 has a lubricant pressure line 14 on, which can be connected to a lubricant source, not shown.
  • Valve 11 About one Valve 11, which is closed in the state shown, is the lubricant pressure line 14 with the lubricant channel 9 leading to the lubrication point on the basic box 2 connectable. Since the valve 11 is closed, the lubricant can pass through a first Line coupling 12 in the lubricant distributor 10a of the telescopic section 3 flow. Since the telescopic section 3 is also not yet extended, so is it Shut-off valve 11 closed, so that there is still no connection with the local one Lubricant channel 9 exists. Rather, this is under pressure through line 14 introduced lubricant passed on to the next line coupling 12 and flows in the lubricant distributor 10b of the telescopic section 4.
  • the supplied lubricant in the Lubricant channel 9 flow into this lubricant distributor 10b and the associated one Lubricate plain bearings. This happens during the telescoping of the Telescopic shot 5.
  • the lubricant distributor 10b needs in the present case as the latter only a line connection from its line coupling 12 to his assigned lubricant channel 9.
  • a identical design as in the other telescopic sections 2, 3 with shut-off valves 11 and 13 may be provided to include at least one more if necessary Install telescopic shot and also be able to lubricate.
  • the switching state is according to the partial figure 2b before.
  • the telescopic section 4 is released Line coupling 12 between the two lubricant distributors 10a, 10b of the Telescopic sections 3 and 4.
  • the lubricant distributor 10a Telescopic shot 3 one lying directly in front of its right line coupling 12 second shut-off valve 13 closed, while the first shut-off valve 11 this Lubricant distributor 10a is opened. This will pave the way for the lubricant in free the lubricant channel 9 on the lubricant distributor 10a for the telescopic shot 3.
  • FIG. 5 shows two on the underside in the head region of a telescopic section 3 on the outside arranged lubricant distributor 10. It can be seen that the housing 16 of the two Lubricant distributor 10 in a very space-saving manner in the area of Reinforcing collar 17 of the telescopic section 3 are housed. On the visible The end face of the housing 16 shows the circular end face of a valve cartridge 18. The interior of the housing 16 of the lubricant distributor 10 is in each case by a Lateral lubricant channel 9 with the inner surface of a Slide bearing 7 connected. This can be seen from the illustration in FIG. 6, which shows the interior of the telescopic section 3 according to FIG. 5. It can also be seen in FIG.
  • Valve cartridge 18 For introducing the lubricant into the housing 16 of the lubricant distributor 10 or for the passage of the lubricant through a lubricant distributor 10 is one Valve cartridge 18 is provided, the function of which can be seen in FIGS. 3 and 4.
  • the Valve cartridge 18 has a substantially hollow cylindrical housing 19 which on the both ends are closed with walls, in each of which at least one frontal opening 20, 21 is arranged.
  • the opening 20 on the right end can by a non-return valve 15, which in the present case is designed as a membrane 22, be shot.
  • a compression spring 25 is located inside the housing 19 arranged, which presses the membrane 22 against the right end face, so that Lubricant, which is in the housing 19, not inadvertently can exit through the opening 20.
  • lubricant which is introduced under pressure through the opening 20, the membrane 22 against the force of Slide spring 25 to the left so that the lubricant is inside the housing 19 occur and can flow through an opening 23 in the membrane 22.
  • an opening 27 is arranged through which inflowing lubricant from the housing 19 of the valve cartridge 18 into the interior of the Housing 16 of the associated lubricant distributor (Fig. 7 and 8) can emerge.
  • This opening 27 is only free if the one shown in the left part of FIG. 3 Locking piston 28, which is slidably mounted in the housing 19, in its left Edge location.
  • the locking piston 28 is provided with a seal 24, which here is simply formed as the left end face of the locking piston 28 and in a similar manner like the membrane 22 in the position shown, an opening 21 in the left end face of the Closes housing 19.
  • the locking piston 28 has a piston rod 29 which penetrates left end of the housing 19. If the locking piston 28 over the Piston rod 29 is moved to the right, the opening 27 through the Locking piston 28 covered and thus closed.
  • the lubricant flow path shown in the line is shown in the three representations 4.
  • the partial figure 4a shows the switching position in which the inflowing Lubricant not for lubricating the sliding surfaces of the associated plain bearing can flow out, but into the next (not shown) valve cartridge through the Opening 21 overflows because the closing piston 28 is in the retracted position located.
  • the partial figure 4b shows the state in which the membrane 22 due to the under Pressure lubricant in turn is shifted to the left, so that Lubricant can enter the valve cartridge 18.
  • the closing piston 28 is in its left End position, so that the path for the lubricant through the opening 27 into the interior of the Housing 16 of the lubricant distributor 10 or in the lubricant channel 9 of the associated plain bearing is open.
  • the partial figure 4c finally shows the state in which the valve cartridge 18 is in the rest position, ie the associated telescopic section is already extended. In this case, the openings 20 and 21 are due to the effect the compression spring 25 closed on the associated seals 22 and 24. Only that Opening 27 to the lubricant channel 9 is open.
  • the present invention is based on the example of a telescopic boom with two comprehensive Telescopic shots 2, 3 have been shown.
  • the number of possible Telescopic shots not restricted upwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
EP02090383A 2001-12-14 2002-11-19 Flèche télescopique avec alimentation de lubrifiant Expired - Lifetime EP1319629B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10164565A DE10164565C2 (de) 2001-12-14 2001-12-14 Teleskopausleger mit Schmiermittelzuführung
DE10164565 2001-12-14

Publications (2)

Publication Number Publication Date
EP1319629A1 true EP1319629A1 (fr) 2003-06-18
EP1319629B1 EP1319629B1 (fr) 2005-07-06

Family

ID=7711202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02090383A Expired - Lifetime EP1319629B1 (fr) 2001-12-14 2002-11-19 Flèche télescopique avec alimentation de lubrifiant

Country Status (3)

Country Link
EP (1) EP1319629B1 (fr)
AT (1) ATE299125T1 (fr)
DE (2) DE10164565C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189413A1 (fr) * 2008-11-19 2010-05-26 Terex Demag GmbH Agencement de fixation d'éléments de glissement pour guider des sections des grues télescopiques
EP2464591A1 (fr) * 2009-11-30 2012-06-20 Cargotec Patenter AB Élément coulissant et dispositif télescopique comportant un tel élément coulissant
IT201800004277A1 (it) * 2018-04-06 2019-10-06 Braccio telescopico per una gru di sollevamento di carichi

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011115634B4 (de) 2011-03-25 2021-12-30 Tadano Demag Gmbh Teleskopausleger
DE102011084105A1 (de) 2011-10-06 2013-04-11 Schaeffler Technologies AG & Co. KG Teleskopierbare Rohranordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653502A1 (de) * 1996-12-20 1998-06-25 Kidde Ind Inc Vorrichtung und Verfahren zum Arretieren bzw. Lösen der Arretierung von Schüssen eines Teleskopauslegers für einen fahrbaren Kran
DE29917677U1 (de) * 1999-10-07 2000-02-17 Liebherr-Werk Nenzing Ges.M.B.H., Nenzing, Vorarlberg Kranausleger
JP2001158594A (ja) * 1999-12-06 2001-06-12 Sumitomo Constr Mach Co Ltd 移動式クレーン

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3285431A (en) * 1965-04-30 1966-11-15 Universal Marion Corp Guide roll assembly for telescopic boom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653502A1 (de) * 1996-12-20 1998-06-25 Kidde Ind Inc Vorrichtung und Verfahren zum Arretieren bzw. Lösen der Arretierung von Schüssen eines Teleskopauslegers für einen fahrbaren Kran
DE29917677U1 (de) * 1999-10-07 2000-02-17 Liebherr-Werk Nenzing Ges.M.B.H., Nenzing, Vorarlberg Kranausleger
JP2001158594A (ja) * 1999-12-06 2001-06-12 Sumitomo Constr Mach Co Ltd 移動式クレーン

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 23 10 February 2001 (2001-02-10) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189413A1 (fr) * 2008-11-19 2010-05-26 Terex Demag GmbH Agencement de fixation d'éléments de glissement pour guider des sections des grues télescopiques
EP2464591A1 (fr) * 2009-11-30 2012-06-20 Cargotec Patenter AB Élément coulissant et dispositif télescopique comportant un tel élément coulissant
EP2464591A4 (fr) * 2009-11-30 2013-08-07 Cargotec Patenter Ab Élément coulissant et dispositif télescopique comportant un tel élément coulissant
IT201800004277A1 (it) * 2018-04-06 2019-10-06 Braccio telescopico per una gru di sollevamento di carichi

Also Published As

Publication number Publication date
DE10164565C2 (de) 2003-12-11
DE50203556D1 (de) 2005-08-11
ATE299125T1 (de) 2005-07-15
DE10164565A1 (de) 2003-07-03
EP1319629B1 (fr) 2005-07-06

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