EP0924158A1 - Appareil de travail - Google Patents

Appareil de travail Download PDF

Info

Publication number
EP0924158A1
EP0924158A1 EP98123939A EP98123939A EP0924158A1 EP 0924158 A1 EP0924158 A1 EP 0924158A1 EP 98123939 A EP98123939 A EP 98123939A EP 98123939 A EP98123939 A EP 98123939A EP 0924158 A1 EP0924158 A1 EP 0924158A1
Authority
EP
European Patent Office
Prior art keywords
pressure medium
piston rod
tool according
space
storage space
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.)
Withdrawn
Application number
EP98123939A
Other languages
German (de)
English (en)
Inventor
Rainer Oberniehaus
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.)
Huning Umwelttechnik GmbH and Co KG
Original Assignee
Huning Umwelttechnik 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 Huning Umwelttechnik GmbH and Co KG filed Critical Huning Umwelttechnik GmbH and Co KG
Publication of EP0924158A1 publication Critical patent/EP0924158A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
    • B66C13/14—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices to load-engaging elements or motors associated therewith
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/065—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted
    • B66F9/0655—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted with a telescopic boom

Definitions

  • the invention relates to an implement with a Pressure medium line according to the preamble of claim 1.
  • Such an implement can be used, for example, as a wheel loader be designed with a variable-length telescopic arm, the front is a lifting or other pick-up tool has to be controlled by means of hydraulic lines. Extendable ladders or other variable-length ladders or supports that can be pivoted about joints are possible. At Such tools are the hydraulic lines Control of the front tool in areas where a change in length of the carrier can be made to which the Pressure medium line must be adaptable, laid in loops, to be one when the telescopic arm is extended, for example to reach straight contact of the loop part and with retracted Telescopic arm a reservoir of pressure medium line to have available.
  • the lifting height of a telescopic arm can amount to several meters per level, so that in the retracted or partially retracted condition Pressure medium line are at risk of getting caught on obstacles.
  • due to frequent folding and unfolding Loops are subject to high material stress on the hoses, that lead to embrittlement and leakage leads.
  • the invention is based on the problem of a pressure medium line, in particular to design hydraulic lines in such a way that it is variable in length without being flexible Hose sections required as a line reservoir become.
  • a part of the pressure medium line trains and its mutually extendable Areas of different parts that are movable relative to one another assigned to the carrier is a bridging one length-variable stage of a carrier, for example one Joint or a telescopic step, without here flexible lines must be laid.
  • the pressure fluid reservoir can be in contact with everyone in the pressure medium line Operate pressure so that the retraction and extension of the carrier with different tool positions is possible. For this purpose there is a storage room and a compensation room provided in the pressure fluid reservoir, the opposite be reduced or enlarged so that you Total volume remains constant.
  • a structurally simple training a pressure medium accumulator results if this comprises at least one hydraulic cylinder, the piston rod with part of the carrier and its cylinder housing is connected to another part of the carrier, so that by pulling out the piston rod relative to the cylinder housing the change in length of the beam can be followed can.
  • the implement 1 is in the first embodiment (Fig. 1 to Fig. 4) by a wheel loader with a telescopic extendable carrier 2 formed, the front is provided with a lifting fork 3 which is pivotable about a joint 4 is. Others come instead of a wheel loader Tools, such as extendable ladders, in question. In addition the carrier 2 does not have to be formed on a vehicle be.
  • At least one pressure medium line runs along the carrier 5, for example a hydraulic line. This serves to control the front tool 3.
  • the pressure medium line 5 with the pivoting movement of the Tool 3 around the hydraulic cylinder 6 effecting the joint 4 connected.
  • the carrier 2 comprises several - in the illustrated embodiment two - parts 2a, 2b, at a level 7 against each other are movable.
  • a drive cylinder is used for this 8.
  • the pressure fluid reservoir 9 can therefore by relative movement of the against each other extendable parts 10 and 11 of the change in length follow carrier 2.
  • a storage space 13 is provided in the pressure medium store 9, the extendable when extending the carrier 2 and is therefore expandable in terms of its volume, whereby this storage space 13 with a compensation space 14 in connection stands, when pulling out the carrier 2 to equal volume is reduced so that the sum of Volumes of the storage space 13 and the compensation space 14 is constant.
  • the pressure medium reservoir 9 comprises in the first embodiment two hydraulic cylinders 15 and 16, the cylinder housing 15a and 16a assigned to part 2a of carrier 2 are and by means of fasteners, such as the Eyes 17a penetrating bolts are attached.
  • the extendable relative to the cylinder housings 15a and 16a Piston rods 15b and 16b are with the parts 2b of the carrier 2 extendable relative to the cylinder housings 15a, 16a and are fixed to the parts 2b by the eyelets 17b.
  • the hydraulic line 5 is guided such that it is one Has connection 18 to the storage space 13 and from there through an axial bore 19 in the piston rod 15b of the Cylinder 15 is guided to a port 20 to which another part, for example as a hose line is trained, the hydraulic line 5 connects.
  • a port 20 to which another part, for example as a hose line is trained, the hydraulic line 5 connects.
  • the two hydraulic cylinders 15 and 16 are caused by the relative movement the parts 2a, 2b of the carrier 2 parallel to each other extended or retracted.
  • the Storage space 13 When enlarging the Storage space 13 is the above the pressure plate 22 of the Hydraulic cylinder 16 lying annular space 14, which as Compensation room serves to reduce the size by what the hydraulic cylinder 16 one relative to the cylinder 15 has enlarged cross section. This ensures that the compensation room 14, although in it the Piston rod 16b extends, reduced by the same amount is how the storage space 13 is enlarged.
  • the Extending or inserting the carrier 2 is therefore the Pressure of the pressure medium in the pressure medium line 5 constant held, an unintentional actuation of the tool 3 is avoided.
  • the compensating line 21 with the largest possible cross section to execute To ensure a quick pressure equalization between Storage space 13 and compensation space 14 is to be made possible the compensating line 21 with the largest possible cross section to execute.
  • the tool 3 is operated as before by a pressure increase or decrease in the pressure medium line 5, which extends through the axial bore 19 in the piston rod 15b over the entire length of the pressure medium line 5 continues.
  • the cylinders 15, 16 are through this Change in working pressure not activated, a change in length of the carrier 2 is by operating the tool 3 not effected.
  • two hydraulic cylinders 115, 116 are also parallel to each other arranged, but do not just set a pressure medium line 5 continues as in the first exemplary embodiment, but are installed in two pressure medium lines 105 and 105 ', each cylinder 115 and 116 both one Storage space 113 or 113 'as well as a compensation space 114 'and 114 contains.
  • the storage space 113 is included the compensation chamber 114 connected via a compensation line 121, the storage space 113 'and the compensation space 114' for the second pressure medium line 105 'are via a second Compensating line 121 'connected to each other.
  • the compensation lines 121, 121 'are only drawn schematically.
  • the piston rod 115b or 116b extends over each the entire axial length of the hydraulic cylinders 115 and 116, so that both the storage spaces 113 and 113 'as also the compensation spaces 114 and 114 'between the respective piston rod 115b or 116b and the inner wall of the respective cylinder housing 115a or 116a are.
  • a different design of the cross sections hydraulic cylinders 115 and 116 are not required.
  • the memory space 113 increases the first pressure medium line 105, the compensation space 114, the in connection via the compensating line 121 is reduced by an equal amount, so that the Sum of the volumes in rooms 113 and 114 again constant remains, the pressure in the pressure medium line 105 drops not starting.
  • the two hydraulic cylinders 115 and 116 are of the same type formed, the storage space 113 contained therein or 113 'is through the pressure plate 122 of the piston rod 115b or 116b from the compensation space 114 ' or 114 separated.
  • the pressure medium reservoir 209 is of a single one Hydraulic cylinder 215 formed, which is both a storage space 213 as well as a compensation space 214, wherein both rooms arranged within a pressure medium line 205 are.
  • the cylinder housing 215a is on the inside a central one running in the axial direction Tube 215c on that with an axial bore 219 Passage of pressure medium is provided and in contrast the piston rod 215b is axially displaceable.
  • the axial tube 215c is fixedly connected to the cylinder housing 215a, the piston rod 215b correspondingly against both parts 215a, 215c movable.
  • the storage space 213 is formed from an axial cavity inside the piston rod 215b.
  • the compensation space 214 is formed by a annular space between the cylinder housing 215a and the piston rod 215b and another, concentric for this purpose, annular space between the piston rod 215b and the central axial tube 215c.
  • the two Parts of the storage space 214 are located above radial openings 221b in the end region facing the pressure plate 222 the piston rod 215b in communication with each other.
  • a Transfer of pressure medium between the storage space 213 and the parts of the compensation space 214 are through openings 221 in the end region of an axial tube 215c Connection 223 enables.
  • These breakthroughs 221 are axial and are either single or larger in total in terms of cross-section than the cross section of the central bore 219.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Magnetically Actuated Valves (AREA)
  • Actuator (AREA)
EP98123939A 1997-12-18 1998-12-16 Appareil de travail Withdrawn EP0924158A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29722394U 1997-12-18
DE29722394U DE29722394U1 (de) 1997-12-18 1997-12-18 Arbeitsgerät

Publications (1)

Publication Number Publication Date
EP0924158A1 true EP0924158A1 (fr) 1999-06-23

Family

ID=8050160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98123939A Withdrawn EP0924158A1 (fr) 1997-12-18 1998-12-16 Appareil de travail

Country Status (2)

Country Link
EP (1) EP0924158A1 (fr)
DE (1) DE29722394U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009124957A1 (fr) * 2008-04-10 2009-10-15 Commissariat A L'energie Atomique Verin hydraulique et structure d ' actionnement d' un bras manipulateur mettant en oeuvre au mois un tel verin
EP2568084A1 (fr) * 2011-09-07 2013-03-13 EPSILON Kran GmbH. Bras de grue télescopable
WO2013063362A1 (fr) * 2011-10-27 2013-05-02 Parker-Hannifin Corporation Tube de portage de fluide télescopique
US9803663B2 (en) 2011-10-27 2017-10-31 Parker-Hannifin Corporation Telescoping fluid porting tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858396A (en) * 1972-08-02 1975-01-07 Poclain Sa Device for feeding a hydraulic load element mounted on a telescopic structure, by means of two jacks
GB1525923A (en) * 1975-10-09 1978-09-27 Liner Concrete Machinery Load handling vehicle with load engaging means
EP0567363A1 (fr) * 1992-04-24 1993-10-27 Marrel Alimentation en fluide pour un organe téléscopique de chargement et de déchargement d'un véhicule
US5638616A (en) * 1994-12-21 1997-06-17 Nikken Corporation Oil supply mechanism in a deep excavator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086413B (de) * 1958-12-10 1960-08-04 Demag Zug Gmbh Fahrbarer Kran mit hydraulisch betriebener Greifeinrichtung
SE358450B (fr) * 1971-11-26 1973-07-30 Assa Ab
US4964780A (en) * 1988-01-11 1990-10-23 Robert Karvonen Extendible boom forklift with level reach control
GB2263270B (en) * 1992-01-20 1995-01-11 D J Ind Ltd Load handling apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858396A (en) * 1972-08-02 1975-01-07 Poclain Sa Device for feeding a hydraulic load element mounted on a telescopic structure, by means of two jacks
GB1525923A (en) * 1975-10-09 1978-09-27 Liner Concrete Machinery Load handling vehicle with load engaging means
EP0567363A1 (fr) * 1992-04-24 1993-10-27 Marrel Alimentation en fluide pour un organe téléscopique de chargement et de déchargement d'un véhicule
US5638616A (en) * 1994-12-21 1997-06-17 Nikken Corporation Oil supply mechanism in a deep excavator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009124957A1 (fr) * 2008-04-10 2009-10-15 Commissariat A L'energie Atomique Verin hydraulique et structure d ' actionnement d' un bras manipulateur mettant en oeuvre au mois un tel verin
FR2930004A1 (fr) * 2008-04-10 2009-10-16 Commissariat Energie Atomique Verin hydraulique et structure d'actionnement d'un bras manipulateur mettant en oeuvre au moins un tel verin
EP2568084A1 (fr) * 2011-09-07 2013-03-13 EPSILON Kran GmbH. Bras de grue télescopable
CN102992208A (zh) * 2011-09-07 2013-03-27 埃普斯隆起重机有限公司 可伸缩的起重臂以及具有该可伸缩的起重臂的起重机
WO2013063362A1 (fr) * 2011-10-27 2013-05-02 Parker-Hannifin Corporation Tube de portage de fluide télescopique
US9803663B2 (en) 2011-10-27 2017-10-31 Parker-Hannifin Corporation Telescoping fluid porting tube

Also Published As

Publication number Publication date
DE29722394U1 (de) 1999-04-22

Similar Documents

Publication Publication Date Title
EP1072554B1 (fr) Grue à flèche téléscopique
DE112011101697T5 (de) Zweirohriges Horizontalbohrsystem
EP1749789B1 (fr) Poutre télescopique
DE102009006292A1 (de) Verriegelungssystem für Teleskopkranausleger mit verschiebbarer Verriegelungseinheit
AT12645U1 (de) Ladekran-ausleger
DE3622424A1 (de) Zweistufiger teleskopzylinder
DE69102384T2 (de) Teleskopzylinder.
EP2568084B1 (fr) Bras de grue télescopable
DE102013011173B4 (de) Verfahren zur Montage eines Krans sowie Anlenkschuss, Teleskopausleger und Kran
DE2702650B2 (de) Hydraulikzylinder
DE102012002122B4 (de) Verriegelungsvorrichtung für einen Teleskopausleger
EP0924158A1 (fr) Appareil de travail
DE3221984C2 (fr)
DE2028826C2 (de) Teleskopausleger mit einem Grundausleger und mindestens zwei aus- und einfahrbaren Teleskopteilen
DE1274291B (de) Mehrstufig teleskopierbarer Ausleger
EP0581270B1 (fr) Système télescopique à plusieurs vérins à piston plongeur, particulièrement pour les flèches télescopiques pour grues ou des choses pareilles
DE3413443A1 (de) Dreistufiger teleskopausleger
DE102022113302B4 (de) Hydrauliksystem zur Druckversorgung eines hydraulischen Aktuators
DE2310550B2 (de) Hydrauliksteuerung zum Ausfahren eines dreiteiligen Teleskopkranauslegers
DE3601341A1 (de) Arbeitszylinderanordnung
DE3908571A1 (de) Vorrichtung zum wenigstens zeitweisen koppeln der beiden letzten ineinander gefuehrten teleskopischen auslegerschuesse eines kranauslegers
DE2129052C3 (de) Bohrstütze
EP0845070B1 (fr) Ecouvillon pour extraire un noyau de terre hors d'un tuyau pose sans excavation
DE2645752B1 (de) Hydraulisch laengenveraenderbarer Oberlenker
DE3022592A1 (de) Hydraulische steuervorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES FR GB IT NL

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19990901

AKX Designation fees paid

Free format text: BE DE ES FR GB IT NL

17Q First examination report despatched

Effective date: 20020906

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030417