WO2011015442A1 - Support de fourche pour un chariot élévateur - Google Patents

Support de fourche pour un chariot élévateur Download PDF

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Publication number
WO2011015442A1
WO2011015442A1 PCT/EP2010/060327 EP2010060327W WO2011015442A1 WO 2011015442 A1 WO2011015442 A1 WO 2011015442A1 EP 2010060327 W EP2010060327 W EP 2010060327W WO 2011015442 A1 WO2011015442 A1 WO 2011015442A1
Authority
WO
WIPO (PCT)
Prior art keywords
differential cylinder
volume
fork carriage
piston
piston rod
Prior art date
Application number
PCT/EP2010/060327
Other languages
German (de)
English (en)
Inventor
Jürgen KELLER
Original Assignee
Hubtex Maschinenbau Gmbh & 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
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Application filed by Hubtex Maschinenbau Gmbh & Co. Kg filed Critical Hubtex Maschinenbau Gmbh & Co. Kg
Priority to RU2011101955/11A priority Critical patent/RU2533627C2/ru
Priority to AU2010280949A priority patent/AU2010280949A1/en
Priority to EP10734979.7A priority patent/EP2451738B1/fr
Priority to PL10734979T priority patent/PL2451738T3/pl
Publication of WO2011015442A1 publication Critical patent/WO2011015442A1/fr

Links

Classifications

    • 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
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
    • B66F9/142—Movements of forks either individually or relative to each other
    • B66F9/143—Movements of forks relative to each other - symmetric
    • 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
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems

Definitions

  • the invention relates to a fork carriage for a forklift, with a support frame, with at least two load receptacles, preferably tines, which are mounted transversely to the longitudinal extent displaceable on the support frame, each load receiving a hydraulically actuated differential cylinder for effecting the displacement is associated.
  • Forklift trucks are among the most widely used industrial trucks.
  • An essential element of the forklift truck is its lifting unit, which comprises a lifting mast and a fork carriage.
  • the latter comprises two load receptacles (usually tines) which are adjustable in their spacing to adapt to the size of the item to be lifted. The shift is done manually with very simple variants of the fork carriage.
  • each load receiver is associated with a hydraulically operable differential cylinder for effecting dislocation.
  • the differential cylinders are acted upon in parallel with the hydraulic medium.
  • the supplied stream of hydraulic medium - usually hydraulic oil - using a flow divider or Chokes are divided into streams of the required size and fed to the respective differential cylinder.
  • these flow dividers already have a pitch error in the optimum range and are always tuned to a precisely defined volume flow. If this value is undershot, the division error increases. Exceeding leads to increased wear of the flow divider. Such flow divider therefore work acceptable only in a very narrow volume flow range.
  • the invention is therefore an object of the invention to provide a fork carriage for a forklift, which is characterized by improved reliability and less susceptible to wear.
  • the piston rod-side cylinder volume of a differential cylinder is connected to the piston-side volume of another differential cylinder in this fork carriage.
  • the differential cylinders are connected in other words in series. Since the piston rod-side annular surface of the one differential cylinder is in a predetermined relationship to the piston-side surface of the other differential cylinder displacements of the two pistons of the differential cylinder over lengths take place in the supply of a certain volume of hydraulic medium, which are fixed by this ratio. A deviating from this ratio or even independent displacement of each one of the differential cylinder associated load bearing is therefore excluded by principle.
  • the fork carriage according to the invention is thus characterized by a significantly improved reliability. Moreover, since a hydraulic flow divider is completely dispensed with, but the required selection of the differential cylinders used does not lead to additional manufacturing outlay, the fork carriage according to the invention is even more cost-effective to manufacture.
  • the load receptacles preferably comprise adjustable spacing, i. transversely to the longitudinal extent of displaceable tines. Usually, the tines are always displaced by the same length at a fork adjustment.
  • the piston rod-side annular surface of a differential cylinder is thus preferably chosen to be the same size as the piston-side surface of the other differential cylinder.
  • the area ratio is thus preferably 1: 1.
  • the differential cylinder preferably comprise in at least one of its end positions overflow, by means of which overflowed hydraulic medium can be returned to the respective volume ,
  • overflow devices can-particularly preferably-comprise a bypass bore in a cylinder housing whose flow resistance is large compared to that of the remaining flow through the hydraulic medium. lumina of the differential cylinder and their leads is.
  • the tines do not shift back to the zero position, in other words: for example, in the fully retracted position of the piston rod of a differential cylinder, the piston rod of the other differential cylinder is still in a deflected position, the supply of hydraulic medium in this direction of actuation, only continue to be maintained until the volume of the hydraulic medium required to reach the zero position of the second tine has been transferred via this bypass bore.
  • not only two differential cylinders can be connected in series in the manner described. This is also possible with a larger number, so that the fork carriage according to the invention can also be equipped with a larger number of tines, if this is advantageous, for example, for special applications.
  • the invention thus also relates to an industrial truck, in particular a forklift, with a fork carriage of the type described above.
  • the drawing shows an embodiment of a Gabelträ- gers invention is shown. Show it:
  • Figure 1 shows the fork carriage in a perspective view obliquely from the front.
  • FIG. 2 shows the same fork carriage obliquely in a perspective view
  • Fig. 3 is a hydraulic diagram of the fork carriage according to FIGS. 1 and 2, as well
  • Fig. 4 shows the hydraulic diagram of a conventional fork carrier.
  • the slide 2 'shown on the right in FIG. 1 and accordingly on the left in FIG. 2 is accordingly connected to the piston rod 6 of the differential cylinder 4 shown in the drawing below, whose housing 5 is connected to the support frame 7.
  • the piston rod-side annular volume 8 of the upper differential cylinder 4 ' is connected via a connecting line 9 to the piston-side volume 10 of the lower differential cylinder 4.
  • the volumes 8 and 10 and the internal volume of the connecting line 9 thus form an internal volume which is hydraulically substantially separated from the pistons 11, 11 'by an external volume.
  • the outer volume is formed by the piston-side volume 12 of the upper differential cylinder 4 ', by the piston rod-side annular volume 13 of the lower differential cylinder 4 and the volumes of hydraulic lines 14, 14', via which the volume 12 and the annular volume 13 to a hydraulic pressure source 15th are connected.
  • the differential cylinders 4, 4 ' are each equipped with an overflow device 16, 16', via which, in the end positions of the pistons 11, 11 'of the differential cylinders shown in FIG. 3, hydraulic fluid is supplied from the piston-side volumes 10, 12 into the piston rod side Ring volumes 8, 13 can flow over.
  • the overflow devices may comprise the overflow selectively releasing valve means. However, they can also be designed as bypass lines 17, 17 ', which have a considerably higher flow resistance than the other hydraulic volumes.
  • the annular surface 18 of the piston rod side of the differential cylinder 4 is selected to be the same size as the surface 19 of the piston side of the differential cylinder 4.
  • Fig. 4 shows the hydraulic diagram of a conventional fork carrier, is obvious, this is not ensured in the parallel control of the differential cylinder. Because here the respective displacement depends on how the volume flow of the hydraulic medium is distributed over a length divider 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

L'invention concerne un support de fourche (100) pour un chariot élévateur, comprenant une partie porteuse (7), au moins deux logements de charge (1), qui sont montés de façon déplaçable sur le châssis porteur (7), de telle sorte que leur espacement est variable, un cylindre différentiel (4, 4') actionnable de façon hydraulique étant attribué à chaque logement de charge (1) pour la réalisation du déplacement, le volume annulaire (8) côté tige de piston d'un cylindre différentiel (4') étant relié au volume côté piston (10) d'un autre cylindre différentiel (4), et la surface annulaire (18) côté tige de piston de l'un des cylindres différentiels (4') étant dans un rapport prédéfini par rapport à la surface côté piston (19) de l'autre cylindre différentiel (4).
PCT/EP2010/060327 2009-08-07 2010-07-16 Support de fourche pour un chariot élévateur WO2011015442A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
RU2011101955/11A RU2533627C2 (ru) 2009-08-07 2010-07-16 Каретка вил вилочного погрузчика
AU2010280949A AU2010280949A1 (en) 2009-08-07 2010-07-16 Fork carriage for a forklift
EP10734979.7A EP2451738B1 (fr) 2009-08-07 2010-07-16 Support de fourche pour un chariot élévateur
PL10734979T PL2451738T3 (pl) 2009-08-07 2010-07-16 Karetka do wózka widłowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009005118.8 2009-08-07
DE202009005118 2009-08-07

Publications (1)

Publication Number Publication Date
WO2011015442A1 true WO2011015442A1 (fr) 2011-02-10

Family

ID=43543954

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/060327 WO2011015442A1 (fr) 2009-08-07 2010-07-16 Support de fourche pour un chariot élévateur

Country Status (5)

Country Link
EP (1) EP2451738B1 (fr)
AU (1) AU2010280949A1 (fr)
PL (1) PL2451738T3 (fr)
RU (1) RU2533627C2 (fr)
WO (1) WO2011015442A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9744862B2 (en) 2011-09-28 2017-08-29 Continental Teves Ag & Co. Ohg Slip-controlled braking system for electrically driven motor vehicles
WO2022122101A1 (fr) * 2020-12-08 2022-06-16 Logitrans A/S Dispositif de serrage et système de levage mobile doté du dispositif de serrage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9104137U1 (de) * 1991-04-05 1991-06-06 Kinshofer Greiftechnik GmbH, 8176 Waakirchen Greifer, vorzugsweise Steinstapelgreifer
US5088880A (en) * 1990-12-03 1992-02-18 Caterpillar Industrial Inc. Fluid operated fork positioning control system
DE9211128U1 (de) * 1992-08-19 1993-05-19 Kinshofer Greiftechnik GmbH, 83666 Waakirchen Vorrichtung zur Steuerung des Druckausgleichs zwischen zwei Hydrozylindern
DE9404736U1 (de) * 1994-03-21 1995-07-20 Kinshofer Greiftechnik GmbH, 83666 Waakirchen Vorrichtung zur Steuerung zweier Linearmotoren, insbesondere Hydraulikzylinder
DE19943356A1 (de) * 1998-09-11 2000-05-04 Polz S A R L Vorrichtung zum stirnseitigen Ergreifen einer oder mehrerer Paletten unterschiedlicher Abmessungen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU407835A1 (ru) * 1971-10-05 1973-12-10 Грузовая каретка промышленного погрузчика
SU1279945A1 (ru) * 1985-05-06 1986-12-30 Могилевский Машиностроительный Институт Захват к погрузчику

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088880A (en) * 1990-12-03 1992-02-18 Caterpillar Industrial Inc. Fluid operated fork positioning control system
DE9104137U1 (de) * 1991-04-05 1991-06-06 Kinshofer Greiftechnik GmbH, 8176 Waakirchen Greifer, vorzugsweise Steinstapelgreifer
DE9211128U1 (de) * 1992-08-19 1993-05-19 Kinshofer Greiftechnik GmbH, 83666 Waakirchen Vorrichtung zur Steuerung des Druckausgleichs zwischen zwei Hydrozylindern
DE9404736U1 (de) * 1994-03-21 1995-07-20 Kinshofer Greiftechnik GmbH, 83666 Waakirchen Vorrichtung zur Steuerung zweier Linearmotoren, insbesondere Hydraulikzylinder
DE19943356A1 (de) * 1998-09-11 2000-05-04 Polz S A R L Vorrichtung zum stirnseitigen Ergreifen einer oder mehrerer Paletten unterschiedlicher Abmessungen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9744862B2 (en) 2011-09-28 2017-08-29 Continental Teves Ag & Co. Ohg Slip-controlled braking system for electrically driven motor vehicles
WO2022122101A1 (fr) * 2020-12-08 2022-06-16 Logitrans A/S Dispositif de serrage et système de levage mobile doté du dispositif de serrage

Also Published As

Publication number Publication date
EP2451738A1 (fr) 2012-05-16
RU2533627C2 (ru) 2014-11-20
AU2010280949A1 (en) 2011-02-10
EP2451738B1 (fr) 2013-07-10
RU2011101955A (ru) 2012-07-27
PL2451738T3 (pl) 2013-12-31

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