EP1260478A2 - Hydraulische Anordnung für die Hubzylinder eines Flurförderzeugs - Google Patents
Hydraulische Anordnung für die Hubzylinder eines Flurförderzeugs Download PDFInfo
- Publication number
- EP1260478A2 EP1260478A2 EP02010826A EP02010826A EP1260478A2 EP 1260478 A2 EP1260478 A2 EP 1260478A2 EP 02010826 A EP02010826 A EP 02010826A EP 02010826 A EP02010826 A EP 02010826A EP 1260478 A2 EP1260478 A2 EP 1260478A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- secondary cylinder
- hydraulic arrangement
- primary
- lifting
- 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
Links
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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
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
Definitions
- the invention relates to a hydraulic arrangement for at least two, to a common Pressure medium supply to the connected lifting cylinders of an industrial truck, one of which is provided as the first primary cylinder and one has a larger piston diameter than the second lifting cylinder, as the following extending secondary cylinder is provided.
- Generic arrangements come in multi-stage masts from forklifts for use.
- the primary cylinder with a load handler connected, for example a fork carriage, while the secondary cylinder to one height-adjustable mast of a mast coupled from a mast and one or more telescopically extendable masts.
- the exit sequence the lifting cylinder is determined by the piston surfaces of the lifting cylinder, the primary cylinder extends first due to its larger piston area. First when the primary cylinder is fully extended and hits a limit, the secondary cylinder begins to extend. In this way, a free lift achieved in which the load can be raised by the primary cylinder without the Extend the mast.
- the primary cylinder is therefore also called a "free lift cylinder" designated.
- the present invention is based on the object of an arrangement of the beginning to provide the type mentioned, even under unfavorable circumstances the extension sequence of the lifting cylinders is observed.
- This object is achieved in that the secondary cylinder pressure-dependent opening check valve is connected upstream.
- the idea essential to the invention is therefore the pressure difference between the two lifting cylinders by means of a valve.
- This is in principle any valve that achieves the desired pressure boosting function.
- Admittedly the pressure difference between the two lifting cylinders also increases that the piston diameter of the primary cylinder is increased, but this has the Disadvantage that the difference in the lifting speeds of the two lifting cylinders increases becomes what is a very unsteady movement when lifting and lowering of the load handler.
- the pressure difference is increased by achieved a check valve.
- the check valve is not activated until the end of the stroke of the primary cylinder unlocked the increasing pressure.
- a significantly higher pressure is required than for lifting the primary cylinder.
- Hydraulic oil it is also possible to determine the piston or piston rod diameter of the Reduce primary cylinder and thus reduce its dimensions. from that result in lower costs and an improved view through the mast.
- the Primary cylinder is connected downstream of the secondary cylinder and one to the secondary cylinder parallel secondary cylinder is provided, the Check valve is connected upstream of the second secondary cylinder.
- Another favorable embodiment of the invention provides that the primary cylinder is connected in parallel to the secondary cylinder.
- the check valve can be arranged in a line leading to the secondary cylinder his. According to an advantageous development of the invention, the check valve is in the Secondary cylinder integrated.
- check valve is in the bottom of the cylinder Secondary cylinder arranged bore which through the piston of the Secondary cylinder or a slide guided in the piston is closable.
- Two hydraulic cylinders 2 and 3 are provided on a hydraulic supply line 1 Lifting cylinder, which with an extendable mast of a mast in Connected, connected in parallel.
- a provided as a primary cylinder 4 Lift cylinder with one on the extendable mast of the mast vertically movable load suspension device is in connection with the one on the left in the figure Secondary cylinder 2 connected.
- the secondary cylinder 3 on the right in the figure is in a branch line 1a of the supply line 1 upstream of a check valve 5, which is initially closed (e.g. due to spring loading). Hydraulic oil under pressure therefore flows first into the Secondary cylinder 2 and the primary cylinder 4. Because the piston diameter of the primary cylinder 4 is larger than the piston diameter of the secondary cylinder 2, drives first the primary cylinder 4 from. As soon as the primary cylinder 4 is fully extended, increases the pressure of the hydraulic oil, whereby the check valve 5 opens and Hydraulic oil not only the secondary cylinder 2 but also the secondary cylinder 3 pressurized so that both secondary cylinders 2 and 3 extend.
- Figure 2 shows a variant of the invention, in which only a single secondary cylinder 3 is present.
- the primary cylinder 4 is the secondary cylinder 3 switched in parallel.
- Figure 3 shows an embodiment of the invention, in which the check valve 5 in the secondary cylinder 3 is integrated.
- a cylinder bottom 6 of the secondary cylinder 3 a recess 7 is arranged, into which the branch line 1 a opens at the lower end and which has a bore 8 to the cylinder chamber 9 at the upper end.
- the bore 8 is in the retracted state of the secondary cylinder 3 by the piston 10 (left Half of the illustration) or by a spring-loaded guided in the piston 10 Slider 11 (right half of the illustration) closed.
- a sealing action 12 is provided.
Abstract
Description
- Figur 1
- eine erfindungsgemäße hydraulische Anordnung,
- Figur 2
- eine Variante der erfindungsgemäßen hydraulischen Anordnung und
- Figur 3
- einen Schnitt durch das untere Ende eines Sekundärzylinders.
Claims (5)
- Hydraulische Anordnung für mindestens zwei, an eine gemeinsame Druckmittelversorgung angeschlossene Hubzylinder eines Flurförderzeugs, von denen einer als zuerst ausfahrender Primärzylinder vorgesehen ist und einen größeren Kolbendurchmesser aufweist als der zweite Hubzylinder, der als nachfolgend ausfahrender Sekundärzylinder vorgesehene Hubzylinder, dadurch gekennzeichnet, dass dem Sekundärzylinder (3) ein druckabhängig öffnendes Sperrventil (5) vorgeschaltet ist.
- Hydraulische Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Primärzylinder (4) dem Sekundärzylinder (2) nachgeschaltet ist und ein zu dem Sekundärzylinder (2) parallel geschalteter zweiter Sekundärzylinder (3) vorgesehen ist, wobei das Sperrventil (5) dem zweiten Sekundärzylinder (3) vorgeschaltet ist.
- Hydraulische Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Primärzylinder (4) parallel zum Sekundärzylinder (3) geschaltet ist.
- Hydraulische Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Sperrventil (5) in den Sekundärzylinder (3) integriert ist.
- Hydraulische Anordnung nach Anspruch 4, dadurch gekennzeichnet, dass das Sperrventil (5) eine im Zylinderboden (6) des Sekundärzylinders (3) angeordnete Bohrung (8) aufweist, die durch den Kolben (10) des Sekundärzylinders (3) oder einen im Kolben (10) geführten Schieber (11) verschließbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001125351 DE10125351A1 (de) | 2001-05-23 | 2001-05-23 | Hydraulische Anordnung für die Hubzylinder eines Flurförderzeugs |
DE10125351 | 2001-05-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1260478A2 true EP1260478A2 (de) | 2002-11-27 |
EP1260478A3 EP1260478A3 (de) | 2005-04-20 |
EP1260478B1 EP1260478B1 (de) | 2008-09-17 |
Family
ID=7685999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020010826 Expired - Fee Related EP1260478B1 (de) | 2001-05-23 | 2002-05-15 | Hydraulische Anordnung für die Hubzylinder eines Flurförderzeugs |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1260478B1 (de) |
DE (2) | DE10125351A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1528035A2 (de) * | 2003-10-22 | 2005-05-04 | STILL WAGNER GmbH & Co KG | Hubwerk, insbesondere für einen Hochregalstapler |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005052116B4 (de) * | 2005-11-02 | 2017-10-26 | Linde Material Handling Gmbh | Einrichtung zur Sicherung der Bewegungsreihenfolge von mindestens zwei fluidbetätigten Verdrängereinheiten |
DE102006003660B4 (de) * | 2006-01-26 | 2016-02-18 | Linde Material Handling Gmbh | Einrichtung zur Sicherung der Bewegungsreihenfolge von mindestens zwei fluidbetätigten Verdrängereinheiten |
DE102007062491A1 (de) | 2007-12-22 | 2009-06-25 | Linde Material Handling Gmbh | Hubeinrichtung mit einem Steuerventil, einer elektronischen Hubsteuereinheit und einem Temperatursensor |
DE102008013765A1 (de) | 2008-03-12 | 2009-09-17 | Linde Material Handling Gmbh | Einrichtung zur Sicherung der Bewegungsreihenfolge von zumindest zwei fluidbetätigten Verdrängereinheiten |
DE102009011865B4 (de) * | 2009-03-05 | 2021-11-18 | Jungheinrich Aktiengesellschaft | Hubvorrichtung für ein Flurförderzeug |
DE102011016542A1 (de) | 2011-04-08 | 2012-10-11 | Jungheinrich Aktiengesellschaft | Flurförderzeug, insbesondere Schubmaststapler mit einem Hubgerüst |
DE102012107159A1 (de) | 2012-08-03 | 2014-02-06 | Linde Material Handling Gmbh | Hydraulische Einrichtung zur Sicherung der Ausfahrreihenfolge von mindestens zwei Hubzylindereinrichtungen |
DE102013103203A1 (de) | 2013-03-28 | 2014-10-02 | Linde Material Handling Gmbh | Hubzylindereinrichtung eines mehrstufigen Hubgerüstes eines Flurförderzeugs |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1431497A1 (de) * | 1964-05-04 | 1968-12-19 | Hans Still Gmbh | Hydraulische Hubvorrichtung,insbesondere fuer Flurfoerdergeraete |
DE1804054A1 (de) * | 1967-10-20 | 1969-12-18 | Cascade Corp | Folgesteuerung fuer einen hydraulischen Motor |
US3587784A (en) * | 1968-09-26 | 1971-06-28 | Hunter Manufacturing Co Inc | Telescopic load booster |
DE2507416A1 (de) * | 1975-02-21 | 1976-08-26 | Hunger Walter Kg | Anordnung zweier parallel zueinander ein- oder mehrstufiger geschalteter teleskopzylinder |
FR2321448A1 (fr) * | 1975-08-20 | 1977-03-18 | Eaton Corp | Systeme hydraulique pour chariot elevateur |
US4041839A (en) * | 1975-11-24 | 1977-08-16 | Cascade Corporation | Telescopic ram |
US4593791A (en) * | 1984-04-17 | 1986-06-10 | Allis-Chalmers Corporation | Automatic sequencing circuit for lift cylinders |
-
2001
- 2001-05-23 DE DE2001125351 patent/DE10125351A1/de not_active Withdrawn
-
2002
- 2002-05-15 DE DE50212778T patent/DE50212778D1/de not_active Expired - Lifetime
- 2002-05-15 EP EP20020010826 patent/EP1260478B1/de not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1431497A1 (de) * | 1964-05-04 | 1968-12-19 | Hans Still Gmbh | Hydraulische Hubvorrichtung,insbesondere fuer Flurfoerdergeraete |
DE1804054A1 (de) * | 1967-10-20 | 1969-12-18 | Cascade Corp | Folgesteuerung fuer einen hydraulischen Motor |
US3587784A (en) * | 1968-09-26 | 1971-06-28 | Hunter Manufacturing Co Inc | Telescopic load booster |
DE2507416A1 (de) * | 1975-02-21 | 1976-08-26 | Hunger Walter Kg | Anordnung zweier parallel zueinander ein- oder mehrstufiger geschalteter teleskopzylinder |
FR2321448A1 (fr) * | 1975-08-20 | 1977-03-18 | Eaton Corp | Systeme hydraulique pour chariot elevateur |
US4041839A (en) * | 1975-11-24 | 1977-08-16 | Cascade Corporation | Telescopic ram |
US4593791A (en) * | 1984-04-17 | 1986-06-10 | Allis-Chalmers Corporation | Automatic sequencing circuit for lift cylinders |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1528035A2 (de) * | 2003-10-22 | 2005-05-04 | STILL WAGNER GmbH & Co KG | Hubwerk, insbesondere für einen Hochregalstapler |
EP1528035A3 (de) * | 2003-10-22 | 2006-09-13 | STILL WAGNER GmbH & Co KG | Hubwerk, insbesondere für einen Hochregalstapler |
Also Published As
Publication number | Publication date |
---|---|
EP1260478B1 (de) | 2008-09-17 |
EP1260478A3 (de) | 2005-04-20 |
DE50212778D1 (de) | 2008-10-30 |
DE10125351A1 (de) | 2002-11-28 |
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