EP1325882B1 - Lifting device for lifting loads - Google Patents

Lifting device for lifting loads Download PDF

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Publication number
EP1325882B1
EP1325882B1 EP02027474A EP02027474A EP1325882B1 EP 1325882 B1 EP1325882 B1 EP 1325882B1 EP 02027474 A EP02027474 A EP 02027474A EP 02027474 A EP02027474 A EP 02027474A EP 1325882 B1 EP1325882 B1 EP 1325882B1
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EP
European Patent Office
Prior art keywords
cylinder
lifting
piston
lifting device
bridge
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EP02027474A
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German (de)
French (fr)
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EP1325882A1 (en
Inventor
Karl-Heinz Jung
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Individual
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Individual
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Priority to DE20220613U priority Critical patent/DE20220613U1/en
Publication of EP1325882A1 publication Critical patent/EP1325882A1/en
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    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/36—Load-engaging elements
    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated

Definitions

  • the present invention relates to a hydraulic lifting device, in particular a small lifting device, for lifting loads.
  • Lifting devices of this type are used to load comparatively heavy loads, e.g. Machines and tracked vehicles to lift. For example, loads of 10 t to 50 t can be lifted with such a lifting device.
  • a lifting device of the type mentioned is known for example from US 2,550,674 and has two parallel to the stroke direction arranged hydraulic piston-cylinder units, each having a cylinder in which a piston attached to a piston rod is mounted adjustable in stroke.
  • Each piston rod is led out of the cylinder on the side facing away from the piston and supported on a support foot.
  • the cylinders are firmly connected to each other at their ends facing the support legs via a bridge.
  • each cylinder in a support leg facing the axial end portion on a guide sleeve which is axially guided on the piston rod.
  • a vertical lifting ram is attached to the bridge.
  • the axial guidance of the respective piston rod in the associated cylinder takes place in the known lifting device on the one hand via the associated piston and on the other hand over the associated guide sleeve. The guiding effect is thus stroke-dependent.
  • a small hydraulic lifting device which has a parallel to the stroke direction arranged hydraulic piston-cylinder unit.
  • a piston is mounted adjustable in stroke, which is fixed to a piston rod.
  • the piston rod is led out of the cylinder on a side facing away from the piston and supported on a bottom plate, which has two support legs.
  • a lifting lug is welded to one of the bottom plate facing the end.
  • the present invention is concerned with the problem of providing for a lifting device of the type mentioned in an improved embodiment, which is particularly suitable in a relatively simple structure for lifting relatively heavy loads and which is also in a special way for temporal lifting heavier, which also have a comparatively low-lying engagement for the lifting device.
  • the invention is based on the general idea to provide two parallel hydraulic piston-cylinder units whose cylinders are connected to each other via a bridge, wherein the lifting lug is attached to this bridge or attachable.
  • the lifting device can be used for lifting heavy loads, wherein the lifting device has a compact structure at the same time.
  • the lifting lug for the lifting device allows a lateral engagement of an extremely low-lying engagement of a load, so that with the aid of the lifting device according to the invention, the load can be lifted laterally. Furthermore, the attachment of the bridge to the guide sleeves results in an extremely secure and accurate axial guidance of the bridge, which improves the support of tilting moments and improves the suitability of the lifting device for lifting loads sideways.
  • the bridge can be arranged between the cylinders and fastened to mutually facing sides of the cylinders. Due to this design, the positioning of the lifting lug is closer to the cylinders. In particular, the lifting lug can be positioned virtually between the cylinders on the bridge. This makes it possible to position the lifting device closer to the load to be lifted, which reduces the resulting moments and increases the efficiency of the lifting device. Of particular importance here is that through this Measure the friction between the cylinders and the piston rods reduce, which can increase the performance of such lifting devices. At the same time, this increases the stability of the lifting device.
  • the piston rod rotatably connected to the support leg and the piston, wherein the piston is rotatably mounted about the cylinder longitudinal axis in the associated cylinder and wherein the support leg is designed so that it is arranged rotatably relative to the cylinder about the cylinder longitudinal axis.
  • the rotation of the piston is used to realize a pivotal adjustment of the support leg. Additional measures, in particular bearings or the like., are not required, so that the lifting device according to the invention is particularly compact and inexpensive builds. Pivoting support feet are particularly advantageous if there is no space for the load to be lifted for the transversely projecting from the respective piston rod support legs. By pivoting away the support feet, the lifting device can thus be brought closer to the load to be lifted.
  • the lifting lug is designed as a separate component and has a hook with which the lifting lug can be hooked to the bridge.
  • Hublaschen can be provided and hooked on the bridge as needed.
  • the lifting device is therefore particularly versatile. Furthermore, just the lifting lug exposed to high wear. Due to the design as a separate component, a damaged lifting lug can be exchanged particularly easily for a new one.
  • a hydraulic lifting device 1 which is designed in particular as a handy, suitably portable, small lifting device, two piston-cylinder units 2, which are arranged in parallel with respect to a stroke direction symbolized by a double arrow.
  • Each piston-cylinder unit 2 has a cylinder 4 in which a piston 5 is adjustably mounted in the stroke direction 3.
  • the piston 5 is fixed, in particular rotationally fixed, connected to a piston rod 6.
  • the piston rod 6 projects out of the cylinder 4 and is supported there on a support leg 7.
  • this support leg 7 is rotatably connected to the piston rod 6.
  • the cylinder 4 has at its end facing the support leg 7 a guide sleeve 8, which on the piston rod. 6 is guided axially. Between the guide sleeve 8 and piston rod 6 while maintaining the lowest possible radial clearance to avoid tilting of the guide sleeve 8 relative to the piston rod 6. Between this guide sleeve 8 and a cylinder end 9 facing away from the support leg 7, the cylinder 4 has a radial clearance relative to the piston rod 6, ie, outside the guide sleeve 8, a radial gap 10 is formed between the cylinder 4 and the piston rod 6. In this way, a wall contact between the piston rod 6 and cylinder 4 is avoided there.
  • the piston 5 is expediently equipped with a radial play relative to the cylinder 4, so that tilting with increased wear between the piston 5 and the cylinder 4 can be avoided here as well. These measures cause the cylinder 4 is guided exclusively by the guide sleeve 8 in the stroke adjustment between the cylinder 4 and the piston rod 6.
  • a hydraulic chamber 11 is formed in the cylinder 4, which communicates with a hydraulic connection 12.
  • the hydraulic connection 12 may also be arranged at a different location.
  • a bridge 14 is arranged between the two cylinders 4 of the two piston-cylinder units 2, which extends transversely to the longitudinal central axes or cylinder longitudinal axes 13 of the cylinders 4 denoted by 13.
  • This bridge 14 is attached to both cylinders 4 and to the guide sleeves 8, in particular by means of corresponding Weld seams 15.
  • a lifting lug 16 is attached. It is also possible to form the guide sleeves 8 together with the bridge 14 as an integral casting.
  • the lifting lug 16 is formed as an L-shaped angle having a back portion 17 which is parallel to the stroke direction 3, and a loading portion 18 which projects transversely from the back portion 17. At one end remote from the loading part 18, a hook 19 is formed on the back part 17, with which the lifting lug 16 is hooked on a bridge upper edge 20 of the bridge 14 facing away from the support feet 7.
  • the upper bridge edge 20 has a step 21 for this purpose.
  • the lifting lug 16 is formed in the embodiment shown here as a separate component which can be hooked or disconnected to the bridge 14 as required. A particular advantage of this design is seen in the fact that a worn lifting lug 16 can be easily replaced with a new one.
  • lifting lugs 16 can be provided, which can be used depending on the particular application.
  • the bridge 14 may extend to approximately the upper ends of the cylinders 4 for this purpose.
  • the attached to the bridge 14 lifting lug 16 is supported with its back part 17 on the bridge 14 from.
  • the bridge 14 is arranged between the cylinders 4 in such a way that it is fastened to the cylinders 4 or to their guide sleeves 8 on mutually facing sides.
  • the positioning is selected so that the back part 17 of the attached lifting lug 16 projects only slightly in the direction of the loading part 18 via the cylinder 4 or its guide sleeves 8.
  • the positioning of the bridge 14 is also selected such that the back part 17 does not project beyond the cylinders 4 or their guide sleeves 8 in the direction of the loading part 18.
  • the piston 5 is rotatably mounted in the cylinder 4. Furthermore, the support legs 7 are shaped so that they are pivotable about the cylinder longitudinal axis 13 even when the bridge 14 is lowered. A corresponding pivoting adjustability is symbolized in FIG. 3 by double arrows 22. Since each support leg 7 is rotatably connected to the associated piston rod 6 and this in turn rotatably coupled to the respective piston 5, each support leg 7 can be pivoted together with the piston rod 6 and the piston 5 relative to the cylinder 4 about the pivot axis 13. This construction has the consequence that no additional storage or the like. must be provided to ensure such pivotability of the support legs 7.
  • This pivoting of the support feet 7 is particularly advantageous, since it is thereby possible to introduce the lifting lug 16 into a lug receptacle on the load to be lifted even if no corresponding or suitable receptacle or recess is provided on the load for the support feet 7.
  • This top plate 23 may also be designed to be removable or attachable. Furthermore, it is possible to use the top plate 23 with a shape adapted to lift certain loads, e.g. Prism, to train. Likewise, an assortment of different top plates 23 can be provided, which can be used depending on the particular application.
  • the lifting device 1 operates as follows:
  • the lifting lug 16 When fully retracted into the cylinder 4 piston 5, the lifting lug 16 is maximally lowered, ie the lifting lug 16 lies with its loading part 18 as shown in FIG. 1 as the support feet 7 on a unspecified here ground or ground. In this position, the lifting device 1 can be arranged on a load to be lifted so that the loading part 18 of the lifting lug 16 engages under the load to be lifted. If necessary, for this purpose, the support legs 7 must be swung away from the lifting lug 16 to the outside or to the rear.
  • the two piston-cylinder units 2 are hydraulically connected in parallel.
  • the hydraulic pressure building up in the hydraulic chamber 11 causes the cylinder 4 to move along the piston rod 6 in the stroke direction 3, lifting the lifting lug 16 via the bridge 14. Due to the hydraulic parallel connection of the two piston-cylinder units 2, the load is evenly distributed to the two support feet 7.
  • the support of the load carried by the piston rods 6 takes place relatively directly and parallel to the stroke direction 3 via the support feet 7, where the bending loads or moments within the lifting device 1 are largely avoided.
  • the lifting device 1 is relatively stable, whereby the safety when lifting heavy loads is increased.
  • Another special feature of the lifting device 1 according to the invention results when the lifting device 1, a load is raised on one side, such that the load pivots about a remote from the lifting device 1 pivot axis, the lifting device 1 laterally engages the load, ie the loading part 18 of the lifting lug 16 extends parallel to the pivot axis.
  • the lifting lug moves when lifting or pivoting the load parallel to the ground upwards, so that the tilted by pivoting relative to the ground load only on the pivot axis facing the end edge of the loading part Lifting tab rests. This creates the risk that the load slips off the lifting lug.
  • the two piston rods 6 perform different strokes when lifting or pivoting the load, since the two piston-cylinder units 2 are connected in parallel hydraulically.
  • the lifting lug 16 with its loading part 18 also rests flat against the load when the inclination of the loading part 18 or the lifting lug 16 with respect to the ground changes during lifting or pivoting.
  • the further removed from the pivot axis piston-cylinder unit 2 then continues to move, with the result that the lifting device 1 is inclined relative to a vertical.
  • the support feet 7 tilt with the ground and ensure a secure footing of the lifting device 1. The risk that the load slips off the lifting lug 16 is reduced.
  • the lifting device 1 according to the invention is relatively compact and can thereby be made comparatively light and, in particular, portable. At the same time, the lifting device 1 according to the invention makes it possible to lift relatively heavy loads, for example from 10 t to 50 t.

Abstract

The lifting jack (1) for loads has two parallel upright hydraulic cylinders (4) receiving pistons (5) with piston rods (6). Each piston rod extends out of the cylinder on the end opposite the piston and has a support foot (7) at its lower end. The cylinders are connected at their upper ends by a bridge to which a lifting flange can be attached.

Description

Die vorliegende Erfindung betrifft eine hydraulische Hebevorrichtung, insbesondere ein Kleinhebegerät, zum Anheben von Lasten.The present invention relates to a hydraulic lifting device, in particular a small lifting device, for lifting loads.

Hebevorrichtungen dieser Art werden dazu verwendet, vergleichsweise schwere Lasten, wie z.B. Maschinen und Kettenfahrzeuge, anzuheben. Beispielsweise können mit einer derartigen Hebevorrichtung Lasten von 10 t bis 50 t angehoben werden.Lifting devices of this type are used to load comparatively heavy loads, e.g. Machines and tracked vehicles to lift. For example, loads of 10 t to 50 t can be lifted with such a lifting device.

Eine Hebevorrichtung der eingangs genannten Art ist beispielsweise aus der US 2,550,674 bekannt und besitzt zwei parallel zur Hubrichtung angeordnete hydraulische Kolben-Zylinder-Aggregate, die jeweils einen Zylinder aufweisen, in dem ein an einer Kolbenstange befestigter Kolben hubverstellbar gelagert ist. Jede Kolbenstange ist auf der vom Kolben abgewandten Seite aus dem Zylinder herausgeführt und an einem Stützfuß abgestützt. Die Zylinder sind an ihren den Stützfüßen zugewandten Enden über eine Brücke miteinander fest verbunden. Desweiteren weist jeder Zylinder in einem dem Stützfuß zugewandten axialen Endabschnitt eine Führungshülse auf, die an der Kolbenstange axial geführt ist. Bei der bekannten Hebevorrichtung ist an der Brücke ein vertikaler Hubstempel angebracht. Die axiale Führung der jeweiligen Kolbenstange im zugehörigen Zylinder erfolgt bei der bekannten Hebevorrichtung zum einen über den zugehörigen Kolben und zum andern über die zugehörige Führungshülse. Die Führungswirkung ist somit hubabhängig.A lifting device of the type mentioned is known for example from US 2,550,674 and has two parallel to the stroke direction arranged hydraulic piston-cylinder units, each having a cylinder in which a piston attached to a piston rod is mounted adjustable in stroke. Each piston rod is led out of the cylinder on the side facing away from the piston and supported on a support foot. The cylinders are firmly connected to each other at their ends facing the support legs via a bridge. Furthermore, each cylinder in a support leg facing the axial end portion on a guide sleeve which is axially guided on the piston rod. In the known lifting device, a vertical lifting ram is attached to the bridge. The axial guidance of the respective piston rod in the associated cylinder takes place in the known lifting device on the one hand via the associated piston and on the other hand over the associated guide sleeve. The guiding effect is thus stroke-dependent.

Aus der DE 93 12 940 U1 ist ein hydraulisches Kleinhebegerät bekannt, das ein parallel zur Hubrichtung angeordnetes hydraulisches Kolben-Zylinder-Aggregat aufweist. In einem Zylinder dieses Kolben-Zylinder-Aggregats ist ein Kolben hubverstellbar gelagert, der an einer Kolbenstange befestigt ist. Die Kolbenstange ist auf einer vom Kolben abgewandten Seite aus dem Zylinder herausgeführt und an einer Bodenplatte abgestützt, die zwei Stützfüße aufweist. Am Zylinder ist an einem der Bodenplatte zugewandten Ende eine Hublasche angeschweißt.From DE 93 12 940 U1 a small hydraulic lifting device is known, which has a parallel to the stroke direction arranged hydraulic piston-cylinder unit. In a cylinder of this piston-cylinder unit, a piston is mounted adjustable in stroke, which is fixed to a piston rod. The piston rod is led out of the cylinder on a side facing away from the piston and supported on a bottom plate, which has two support legs. On the cylinder, a lifting lug is welded to one of the bottom plate facing the end.

Weitere Hebevorrichtungen sind aus der US 2,163,959, der US 2,508,240, der US 3,047,269 und der EP 0 720 964 A1 bekannt.Further lifting devices are known from US 2,163,959, US 2,508,240, US 3,047,269 and EP 0 720 964 A1.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, für eine Hebevorrichtung der eingangs genannten Art eine verbesserte Ausführungsform anzugeben, die insbesondere bei einem vergleichsweise einfachen Aufbau zum Anheben relativ schwerer Lasten geeignet ist und die sich außerdem in besondere Weise zum zeitlichen Anheben schwerer eignet, die außerdem einen vergleichsweise tiefliegenden Eingriff für die Hebevorrichtung besitzen.The present invention is concerned with the problem of providing for a lifting device of the type mentioned in an improved embodiment, which is particularly suitable in a relatively simple structure for lifting relatively heavy loads and which is also in a special way for temporal lifting heavier, which also have a comparatively low-lying engagement for the lifting device.

Dieses Problem wird erfindungsgemäß durch den Gegenstand des unabhängigen Anspruchs gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, zwei parallele hydraulische Kolben-Zylinder-Aggregate vorzusehen, deren Zylinder über eine Brücke miteinander verbunden sind, wobei die Hublasche an dieser Brücke angebracht oder anbringbar ist. Durch diese Bauweise kann die Hebevorrichtung zum Anheben schwerer Lasten verwendet werden, wobei die Hebevorrichtung gleichzeitig einen kompakten Aufbau besitzt. Des weiteren ergibt sich eine relativ breite und dadurch stabile Bodenabstützung für die Hebevorrichtung. Dabei ist von Bedeutung, dass jedem Kolben-Zylinder-Aggregat ein eigener Stützfuß zugeordnet ist, an denen sich die jeweilige Kolbenstange vertikal abstützt. Die stabilisierende Stützwirkung der Stützfüße wird dadurch verbessert.The invention is based on the general idea to provide two parallel hydraulic piston-cylinder units whose cylinders are connected to each other via a bridge, wherein the lifting lug is attached to this bridge or attachable. By this construction, the lifting device can be used for lifting heavy loads, wherein the lifting device has a compact structure at the same time. Furthermore, there is a relatively wide and thus stable ground support for the lifting device. It is important that each piston-cylinder unit is assigned a separate support leg on which the respective piston rod is supported vertically. The stabilizing support effect of the support legs is thereby improved.

Bei der erfindungsgemäßen Hebevorrichtung ermöglicht die Hublasche für die Hebevorrichtung ein seitliches Eingreifen an einem extrem tiefliegenden Eingriff einer Last, so dass mit Hilfe der erfindungsgemäßen Hebevorrichtung die Last seitlich angehoben werden kann. Desweiteren führt die Anbringung der Brücke an den Führungshülsen zu einer extrem sicheren und exakten Axialführung der Brücke, was die Abstützung von Kippmomenten verbessert und die Eignung der Hebevorrichtung zum seitlichen Anheben von Lasten verbessert.In the lifting device according to the invention, the lifting lug for the lifting device allows a lateral engagement of an extremely low-lying engagement of a load, so that with the aid of the lifting device according to the invention, the load can be lifted laterally. Furthermore, the attachment of the bridge to the guide sleeves results in an extremely secure and accurate axial guidance of the bridge, which improves the support of tilting moments and improves the suitability of the lifting device for lifting loads sideways.

Bei einer vorteilhaften Weiterbildung kann die Brücke zwischen den Zylindern angeordnet und an einander zugewandten Seiten der Zylinder befestigt sein. Durch diese Bauweise erfolgt die Positionierung der Hublasche näher an den Zylindern. Insbesondere kann die Hublasche quasi zwischen den Zylindern an der Brücke positioniert werden. Hierdurch ist es möglich, die Hebevorrichtung näher an der anzuhebenden Last zu positionieren, wodurch die entstehenden Momente reduziert und die Leistungsfähigkeit der Hebevorrichtung erhöht wird. Von besonderer Bedeutung ist hierbei, dass sich durch diese Maßnahme die Reibung zwischen den Zylindern und den Kolbenstangen reduzieren läßt, wodurch sich die Leistung derartiger Hebevorrichtungen steigern läßt. Gleichzeitig erhöht sich dadurch die Standsicherheit der Hebevorrichtung.In an advantageous development, the bridge can be arranged between the cylinders and fastened to mutually facing sides of the cylinders. Due to this design, the positioning of the lifting lug is closer to the cylinders. In particular, the lifting lug can be positioned virtually between the cylinders on the bridge. This makes it possible to position the lifting device closer to the load to be lifted, which reduces the resulting moments and increases the efficiency of the lifting device. Of particular importance here is that through this Measure the friction between the cylinders and the piston rods reduce, which can increase the performance of such lifting devices. At the same time, this increases the stability of the lifting device.

Gemäß einer besonders vorteilhaften Weiterbildung kann zumindest bei einem der Kolben-Zylinder-Aggregate die Kolbenstange mit dem Stützfuß und mit dem Kolben drehfest verbunden sein, wobei der Kolben um die Zylinderlängsachse drehbar im zugehörigen Zylinder gelagert ist und wobei der Stützfuß so gestaltet ist, dass er relativ zum Zylinder um die Zylinderlängsachse drehbar angeordnet ist. Durch diese Bauweise wird die Drehbarkeit des Kolbens zur Realisierung einer Schwenkverstellung des Stützfußes genutzt. Zusätzliche Maßnahmen, insbesondere Lager od.dgl., sind dabei nicht erforderlich, so dass die erfindungsgemäße Hebevorrichtung besonders kompakt und preiswert baut. Verschwenkbare Stützfüße sind insbesondere dann von Vorteil, wenn an der anzuhebenden Last kein Freiraum für die quer von der jeweiligen Kolbenstange abstehenden Stützfüße vorgesehen ist. Durch das Wegschwenken der Stützfüße kann die Hebevorrichtung somit näher an die anzuhebende Last herangeführt werden.According to a particularly advantageous development, at least in one of the piston-cylinder units, the piston rod rotatably connected to the support leg and the piston, wherein the piston is rotatably mounted about the cylinder longitudinal axis in the associated cylinder and wherein the support leg is designed so that it is arranged rotatably relative to the cylinder about the cylinder longitudinal axis. By this construction, the rotation of the piston is used to realize a pivotal adjustment of the support leg. Additional measures, in particular bearings or the like., Are not required, so that the lifting device according to the invention is particularly compact and inexpensive builds. Pivoting support feet are particularly advantageous if there is no space for the load to be lifted for the transversely projecting from the respective piston rod support legs. By pivoting away the support feet, the lifting device can thus be brought closer to the load to be lifted.

Ein weiterer Vorteil ergibt sich, wenn die Hublasche als separates Bauteil ausgebildet ist und einen Haken aufweist, mit dem die Hublasche an der Brücke einhakbar ist. Bei dieser Bauweise können insbesondere verschiedene, an unterschiedliche Anwendungsfälle angepaßte Hublaschen bereitgestellt und bedarfsabhängig an der Brücke eingehakt werden.Another advantage is obtained if the lifting lug is designed as a separate component and has a hook with which the lifting lug can be hooked to the bridge. In this construction, in particular different, adapted to different applications Hublaschen can be provided and hooked on the bridge as needed.

Die Hebevorrichtung wird dadurch besonders vielseitig einsetzbar. Des weiteren ist gerade die Hublasche hohem Verschleiß ausgesetzt. Durch die Ausbildung als separates Bauteil kann eine beschädigte Hublasche besonders einfach gegen eine neue ausgetauscht werden.The lifting device is therefore particularly versatile. Furthermore, just the lifting lug exposed to high wear. Due to the design as a separate component, a damaged lifting lug can be exchanged particularly easily for a new one.

Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder funktional gleiche oder ähnliche Bauteile beziehen.A preferred embodiment of the invention is illustrated in the drawings and will be explained in more detail in the following description, wherein like reference numerals refer to identical or functionally identical or similar components.

Es zeigen, jeweils schematisch,

Fig. 1
eine teilweise geschnittene Seitenansicht auf eine Hebevorrichtung nach der Erfindung in einer abgesenkten Ausgangsstellung,
Fig. 2
ein bodennaher Ausschnitt der Ansicht gemäß Fig. 1, jedoch bei einer geringfügig angehobenen Hubstellung,
Fig. 3
eine geschnittene Draufsicht entsprechend der Schnittlinie III in Fig. 1,
Fig. 4
eine Frontansicht auf den bodennahen Abschnitt gemäß der Blickrichtung IV in Fig. 3 und
Fig. 5
eine Schnittansicht durch den bodennahen Abschnitt gemäß den Schnittlinien V in Fig. 3.
Show, in each case schematically,
Fig. 1
a partially sectioned side view of a lifting device according to the invention in a lowered starting position,
Fig. 2
a close-to-ground detail of the view of FIG. 1, but at a slightly raised stroke position,
Fig. 3
a sectional plan view corresponding to the section line III in Fig. 1,
Fig. 4
a front view of the ground-level section according to the viewing direction IV in Fig. 3 and
Fig. 5
a sectional view through the bottom portion according to the section lines V in Fig. 3rd

Entsprechend den Fig. 1 bis 5 weist eine hydraulische Hebevorrichtung 1 nach der Erfindung, die insbesondere als handliches, zweckmäßig tragbares, Kleinhebegerät ausgebildet ist, zwei Kolben-Zylinder-Aggregate 2 auf, die bezüglich einer durch einen Doppelpfeil symbolisierten Hubrichtung 3 parallel angeordnet sind. Jedes Kolben-Zylinder-Aggregat 2 weist einen Zylinder 4 auf, in dem ein Kolben 5 in Hubrichtung 3 verstellbar gelagert ist. Der Kolben 5 ist fest, insbesondere drehfest, mit einer Kolbenstange 6 verbunden. An einer vom Kolben 5 abgewandten Seite ragt die Kolbenstange 6 aus dem Zylinder 4 heraus und ist dort an einem Stützfuß 7 abgestützt. Zweckmäßig ist dieser Stützfuß 7 drehfest mit der Kolbenstange 6 verbunden.1 to 5, a hydraulic lifting device 1 according to the invention, which is designed in particular as a handy, suitably portable, small lifting device, two piston-cylinder units 2, which are arranged in parallel with respect to a stroke direction symbolized by a double arrow. Each piston-cylinder unit 2 has a cylinder 4 in which a piston 5 is adjustably mounted in the stroke direction 3. The piston 5 is fixed, in particular rotationally fixed, connected to a piston rod 6. At a side facing away from the piston 5 side, the piston rod 6 projects out of the cylinder 4 and is supported there on a support leg 7. Suitably, this support leg 7 is rotatably connected to the piston rod 6.

Der Zylinder 4 weist an seinem dem Stützfuß 7 zugewandten Ende eine Führungshülse 8 auf, die an der Kolbenstange 6 axial geführt ist. Zwischen Führungshülse 8 und Kolbenstange 6 ist dabei ein möglichst geringes radiales Spiel einzuhalten, um ein Verkanten der Führungshülse 8 relativ zur Kolbenstange 6 zu vermeiden. Zwischen dieser Führungshülse 8 und einem vom Stützfuß 7 abgewandten Zylinderende 9 weist der Zylinder 4 ein radiales Spiel gegenüber der Kolbenstange 6 auf, d.h., außerhalb der Führungshülse 8 ist zwischen dem Zylinder 4 und der Kolbenstange 6 ein radialer Spalt 10 ausgebildet. Auf diese Weise wird dort ein Wandkontakt zwischen Kolbenstange 6 und Zylinder 4 vermieden. Der Kolben 5 ist zweckmäßig mit einem radialen Spiel gegenüber dem Zylinder 4 ausgestattet, so dass auch hier ein Verkanten mit erhöhtem Verschleiß zwischen Kolben 5 und Zylinder 4 vermieden werden kann. Diese Maßnahmen führen dazu, dass der Zylinder 4 bei der Hubverstellung zwischen Zylinder 4 und Kolbenstange 6 ausschließlich durch die Führungshülse 8 geführt ist.The cylinder 4 has at its end facing the support leg 7 a guide sleeve 8, which on the piston rod. 6 is guided axially. Between the guide sleeve 8 and piston rod 6 while maintaining the lowest possible radial clearance to avoid tilting of the guide sleeve 8 relative to the piston rod 6. Between this guide sleeve 8 and a cylinder end 9 facing away from the support leg 7, the cylinder 4 has a radial clearance relative to the piston rod 6, ie, outside the guide sleeve 8, a radial gap 10 is formed between the cylinder 4 and the piston rod 6. In this way, a wall contact between the piston rod 6 and cylinder 4 is avoided there. The piston 5 is expediently equipped with a radial play relative to the cylinder 4, so that tilting with increased wear between the piston 5 and the cylinder 4 can be avoided here as well. These measures cause the cylinder 4 is guided exclusively by the guide sleeve 8 in the stroke adjustment between the cylinder 4 and the piston rod 6.

Zwischen dem Zylinderende 9 und dem Kolben 5 ist im Zylinder 4 ein Hydraulikraum 11 ausgebildet, der mit einem Hydraulikanschluß 12 kommuniziert. Bei einer anderen Ausführungsform kann der Hydraulikanschluß 12 auch an einer anderen Stelle angeordnet sein.Between the cylinder end 9 and the piston 5, a hydraulic chamber 11 is formed in the cylinder 4, which communicates with a hydraulic connection 12. In another embodiment, the hydraulic connection 12 may also be arranged at a different location.

Entsprechend den Fig. 3 bis 5 ist zwischen den beiden Zylindern 4 der beiden Kolben-Zylinder-Aggregate 2 eine Brücke 14 angeordnet, die sich quer zu den mit 13 bezeichneten Längsmittelachsen oder Zylinderlängsachsen 13 der Zylinder 4 erstreckt. Diese Brücke 14 ist an beiden Zylindern 4 bzw. an deren Führungshülsen 8 befestigt, insbesondere mittels entsprechender Schweißnähte 15. An dieser Brücke 14 ist eine Hublasche 16 angebracht. Ebenso ist es möglich, die Führungshülsen 8 zusammen mit der Brücke 14 als integrales Gußteil auszubilden.According to FIGS. 3 to 5, a bridge 14 is arranged between the two cylinders 4 of the two piston-cylinder units 2, which extends transversely to the longitudinal central axes or cylinder longitudinal axes 13 of the cylinders 4 denoted by 13. This bridge 14 is attached to both cylinders 4 and to the guide sleeves 8, in particular by means of corresponding Weld seams 15. At this bridge 14 a lifting lug 16 is attached. It is also possible to form the guide sleeves 8 together with the bridge 14 as an integral casting.

Bezugnehmend auf Fig. 5 ist die Hublasche 16 als L-förmiger Winkel ausgebildet, der ein Rückenteil 17, das parallel zur Hubrichtung 3 verläuft, und ein Ladeteil 18 aufweist, das quer vom Rückenteil 17 absteht. An einem vom Ladeteil 18 abgewandten Ende ist am Rückenteil 17 ein Haken 19 ausgebildet, mit dem die Hublasche 16 an einer von den Stützfüßen 7 abgewandten Brückenoberkante 20 der Brücke 14 eingehakt ist. Die Brückenoberkante 20 weist zu diesem Zweck eine Stufe 21 auf. Die Hublasche 16 ist bei der hier gezeigten Ausführungsform als separates Bauteil ausgebildet, das bedarfsabhängig an der Brücke 14 einhakbar bzw. davon lösbar ist. Ein besonderer Vorteil dieser Bauweise wird darin gesehen, dass eine verschlissene Hublasche 16 ohne weiteres gegen eine neue ausgetauscht werden kann. Des weiteren kann ein Sortiment unterschiedlicher Hublaschen 16 bereitgestellt werden, die in Abhängigkeit des jeweiligen Anwendungsfalls zum Einsatz kommen können. Außerdem ist es möglich, die Brücke 14 so auszugestalten, dass die Hublasche 16 an verschiedenen Hubpositionen an der Brücke 14 festlegbar ist. Insbesondere kann sich die Brücke 14 zu diesem Zweck bis etwa zu den oberen Enden der Zylinder 4 erstrecken.Referring to Fig. 5, the lifting lug 16 is formed as an L-shaped angle having a back portion 17 which is parallel to the stroke direction 3, and a loading portion 18 which projects transversely from the back portion 17. At one end remote from the loading part 18, a hook 19 is formed on the back part 17, with which the lifting lug 16 is hooked on a bridge upper edge 20 of the bridge 14 facing away from the support feet 7. The upper bridge edge 20 has a step 21 for this purpose. The lifting lug 16 is formed in the embodiment shown here as a separate component which can be hooked or disconnected to the bridge 14 as required. A particular advantage of this design is seen in the fact that a worn lifting lug 16 can be easily replaced with a new one. Furthermore, an assortment of different lifting lugs 16 can be provided, which can be used depending on the particular application. In addition, it is possible to design the bridge 14 in such a way that the lifting lug 16 can be fixed to the bridge 14 at various lifting positions. In particular, the bridge 14 may extend to approximately the upper ends of the cylinders 4 for this purpose.

Die an der Brücke 14 angebrachte Hublasche 16 stützt sich mit ihrem Rückenteil 17 an der Brücke 14 ab. Entsprechend Fig. 3 ist die Brücke 14 zwischen den Zylindern 4 so angeordnet, dass sie an den Zylindern 4 bzw. an deren Führungshülsen 8 an einander zugewandten Seiten befestigt ist. Des weiteren ist die Positionierung so gewählt, dass das Rückenteil 17 der daran angebrachten Hublasche 16 nur geringfügig in Richtung des Ladeteils 18 über die Zylinder 4 bzw. deren Führungshülsen 8 vorsteht. Bei der Ausführungsform gemäß Fig. 1 ist die Positionierung der Brücke 14 außerdem so gewählt, dass das Rückenteil 17 nicht über die Zylinder 4 bzw. deren Führungshülsen 8 in Richtung Ladeteil 18 vorsteht. Diese spezielle Anordnung der Brücke 14 hat zur Folge, dass die Hubvorrichtung 1 mit ihren Kolben-Zylinder-Aggregaten 2 besonders dicht an eine anzuhebende Last herangebracht werden kann. Hierdurch können große Hebel und somit große Momente beim Anheben der Last vermieden werden.The attached to the bridge 14 lifting lug 16 is supported with its back part 17 on the bridge 14 from. Corresponding 3, the bridge 14 is arranged between the cylinders 4 in such a way that it is fastened to the cylinders 4 or to their guide sleeves 8 on mutually facing sides. Furthermore, the positioning is selected so that the back part 17 of the attached lifting lug 16 projects only slightly in the direction of the loading part 18 via the cylinder 4 or its guide sleeves 8. In the embodiment according to FIG. 1, the positioning of the bridge 14 is also selected such that the back part 17 does not project beyond the cylinders 4 or their guide sleeves 8 in the direction of the loading part 18. This special arrangement of the bridge 14 has the consequence that the lifting device 1 with its piston-cylinder units 2 can be brought particularly close to a load to be lifted. As a result, large levers and thus large moments when lifting the load can be avoided.

Der Kolben 5 ist im Zylinder 4 drehbar gelagert. Des weiteren sind die Stützfüße 7 so geformt, dass sie auch bei abgesenkter Brücke 14 um die Zylinderlängsachse 13 schwenkbar sind. Eine entsprechende Schwenkverstellbarkeit ist in Fig. 3 durch Doppelpfeile 22 symbolisiert. Da jeder Stützfuß 7 drehfest mit der zugehörigen Kolbenstange 6 verbunden ist und diese ihrerseits drehfest mit dem jeweiligen Kolben 5 gekoppelt ist, kann jeder Stützfuß 7 zusammen mit der Kolbenstange 6 und dem Kolben 5 relativ zum Zylinder 4 um die Schwenkachse 13 verschwenkt werden. Diese Bauweise hat zur Folge, dass keine zusätzlichen Lager od.dgl. vorgesehen werden müssen, um eine derartige Verschwenkbarkeit der Stützfüße 7 zu gewährleisten. Diese Verschwenkbarkeit der Stützfüße 7 ist besonders vorteilhaft, da es dadurch möglich ist, die Hublasche 16 auch dann in eine Laschenaufnahme an der anzuhebenden Last einzuführen, wenn für die Stützfüße 7 keine entsprechende oder geeignete Aufnahme oder Aussparung an der Last vorgesehen ist.The piston 5 is rotatably mounted in the cylinder 4. Furthermore, the support legs 7 are shaped so that they are pivotable about the cylinder longitudinal axis 13 even when the bridge 14 is lowered. A corresponding pivoting adjustability is symbolized in FIG. 3 by double arrows 22. Since each support leg 7 is rotatably connected to the associated piston rod 6 and this in turn rotatably coupled to the respective piston 5, each support leg 7 can be pivoted together with the piston rod 6 and the piston 5 relative to the cylinder 4 about the pivot axis 13. This construction has the consequence that no additional storage or the like. must be provided to ensure such pivotability of the support legs 7. This pivoting of the support feet 7 is particularly advantageous, since it is thereby possible to introduce the lifting lug 16 into a lug receptacle on the load to be lifted even if no corresponding or suitable receptacle or recess is provided on the load for the support feet 7.

Bei einer besonderen Weiterbildung kann gemäß Fig. 1 an den von den Stützfüßen 7 abgewandten Zylinderenden 9 eine Kopfplatte 23 angebracht, insbesondere angeschweißt, sein, die zusätzlich oder alternativ zur Hublasche 16 zum Anheben einer Last verwendbar ist. Diese Kopfplatte 23 kann ebenso abnehmbar bzw. ansteckbar ausgestaltet sein. Des weiteren ist es möglich, die Kopfplatte 23 mit einer zum Anheben bestimmter Lasten angepaßten Form, z.B. Prisma, auszubilden. Ebenso kann ein Sortiment unterschiedlicher Kopfplatten 23 bereitgestellt werden, die in Abhängigkeit des jeweiligen Anwendungsfalls zum Einsatz kommen können.In a particular embodiment, as shown in FIG. 1, attached to the cylinder ends 9 facing away from the support legs 7, a head plate 23, in particular welded, be, which is additionally or alternatively to the lifting lug 16 for lifting a load used. This top plate 23 may also be designed to be removable or attachable. Furthermore, it is possible to use the top plate 23 with a shape adapted to lift certain loads, e.g. Prism, to train. Likewise, an assortment of different top plates 23 can be provided, which can be used depending on the particular application.

Die erfindungsgemäße Hebevorrichtung 1 arbeitet wie folgt:The lifting device 1 according to the invention operates as follows:

Bei vollständig in den Zylinder 4 eingefahrenem Kolben 5 ist die Hublasche 16 maximal abgesenkt, d.h. die Hublasche 16 liegt mit ihrem Ladeteil 18 gemäß Fig. 1 wie die Stützfüße 7 auf einem hier nicht näher bezeichneten Boden oder Untergrund auf. In dieser Position kann die Hebevorrichtung 1 so an einer anzuhebenden Last angeordnet werden, dass das Ladeteil 18 der Hublasche 16 die anzuhebende Last untergreift. Gegebenenfalls müssen hierzu die Stützfüße 7 von der Hublasche 16 nach außen oder nach hinten weggeschwenkt werden.When fully retracted into the cylinder 4 piston 5, the lifting lug 16 is maximally lowered, ie the lifting lug 16 lies with its loading part 18 as shown in FIG. 1 as the support feet 7 on a unspecified here ground or ground. In this position, the lifting device 1 can be arranged on a load to be lifted so that the loading part 18 of the lifting lug 16 engages under the load to be lifted. If necessary, for this purpose, the support legs 7 must be swung away from the lifting lug 16 to the outside or to the rear.

Nach dem Positionieren der Hebevorrichtung 1 erfolgt die Beaufschlagung mit Hydraulikdruck. Zweckmäßig sind dabei die beiden Kolben-Zylinder-Aggregate 2 hydraulisch parallel geschaltet. Der sich im Hydraulikraum 11 aufbauende Hydraulikdruck führt dazu, dass sich der Zylinder 4 entlang der Kolbenstange 6 in Hubrichtung 3 bewegt und dabei über die Brükke 14 die Hublasche 16 anhebt. Durch die hydraulische Parallelschaltung der beiden Kolben-Zylinder-Aggregate 2 wird die Belastung gleichmäßig auf die beiden Stützfüße 7 verteilt.After positioning the lifting device 1, the application of hydraulic pressure. Appropriately, the two piston-cylinder units 2 are hydraulically connected in parallel. The hydraulic pressure building up in the hydraulic chamber 11 causes the cylinder 4 to move along the piston rod 6 in the stroke direction 3, lifting the lifting lug 16 via the bridge 14. Due to the hydraulic parallel connection of the two piston-cylinder units 2, the load is evenly distributed to the two support feet 7.

Des weiteren erfolgt die Abstützung der von den Kolbenstangen 6 getragenen Last relativ direkt und parallel zur Hubrichtung 3 über die Stützfüße 7, wo dass Biegebelastungen oder Momente innerhalb der Hebevorrichtung 1 weitgehend vermieden werden. Hierdurch steht die Hebevorrichtung 1 relativ stabil, wodurch die Sicherheit beim Anheben schwerer Lasten erhöht wird.Furthermore, the support of the load carried by the piston rods 6 takes place relatively directly and parallel to the stroke direction 3 via the support feet 7, where the bending loads or moments within the lifting device 1 are largely avoided. As a result, the lifting device 1 is relatively stable, whereby the safety when lifting heavy loads is increased.

Eine weitere Besonderheit der erfindungsgemäßen Hebevorrichtung 1 ergibt sich dann, wenn mit der Hebevorrichtung 1 eine Last einseitig angehoben wird, derart, dass die Last um eine von der Hebevorrichtung 1 entfernte Schwenkachse schwenkt, wobei die Hebevorrichtung 1 seitlich an der Last angreift, d.h. das Ladeteil 18 der Hublasche 16 erstreckt sich parallel zur Schwenk-achse. Bei einer herkömmlichen Hebevorrichtung fährt die Hublasche beim Anheben bzw. Schwenken der Last parallel zum Boden nach oben, so dass die durch das Schwenken relativ zum Boden geneigte Last nur noch auf der der Schwenkachse zugewandten Endkante des Ladeteils der Hublasche aufliegt. Hierdurch entsteht die Gefahr, dass die Last von der Hublasche abrutscht. Im Unterschied dazu können bei der erfindungsgemäßen Hebevorrichtung 1 die beiden Kolbenstangen 6 beim Anheben bzw. Schwenken der Last unterschiedliche Hübe ausführen, da die beiden Kolben-Zylinder-Aggregate 2 hydraulisch parallel geschaltet sind. Dies führt dazu, dass die Hublasche 16 mit ihrem Ladeteil 18 auch dann flächig an der Last anliegt, wenn sich beim Anheben bzw. Schwenken die Neigung des Ladeteils 18 bzw. der Hublasche 16 gegenüber dem Boden verändert. Das weiter von der Schwenkachse entfernte Kolben-Zylinder-Aggregat 2 fährt dann weiter aus, mit der Folge, dass sich die Hebevorrichtung 1 gegenüber einer Vertikalen neigt. Dabei verkanten die Stützfüße 7 mit dem Boden und sorgen für einen sicheren Stand der Hebevorrichtung 1. Die Gefahr, dass die Last von der Hublasche 16 abrutscht, ist dabei reduziert.Another special feature of the lifting device 1 according to the invention results when the lifting device 1, a load is raised on one side, such that the load pivots about a remote from the lifting device 1 pivot axis, the lifting device 1 laterally engages the load, ie the loading part 18 of the lifting lug 16 extends parallel to the pivot axis. In a conventional lifting device, the lifting lug moves when lifting or pivoting the load parallel to the ground upwards, so that the tilted by pivoting relative to the ground load only on the pivot axis facing the end edge of the loading part Lifting tab rests. This creates the risk that the load slips off the lifting lug. In contrast, in the lifting device 1 according to the invention, the two piston rods 6 perform different strokes when lifting or pivoting the load, since the two piston-cylinder units 2 are connected in parallel hydraulically. As a result, the lifting lug 16 with its loading part 18 also rests flat against the load when the inclination of the loading part 18 or the lifting lug 16 with respect to the ground changes during lifting or pivoting. The further removed from the pivot axis piston-cylinder unit 2 then continues to move, with the result that the lifting device 1 is inclined relative to a vertical. In this case, the support feet 7 tilt with the ground and ensure a secure footing of the lifting device 1. The risk that the load slips off the lifting lug 16 is reduced.

Die erfindungsgemäße Hebevorrichtung 1 baut relativ kompakt und kann dadurch vergleichsweise leicht und insbesondere tragbar ausgebildet werden. Gleichzeitig ermöglicht die erfindungsgemäße Hebevorrichtung 1 das Anheben relativ schwerer Lasten, von beispielsweise 10 t bis 50 t.The lifting device 1 according to the invention is relatively compact and can thereby be made comparatively light and, in particular, portable. At the same time, the lifting device 1 according to the invention makes it possible to lift relatively heavy loads, for example from 10 t to 50 t.

Claims (10)

  1. A hydraulic lifting device for lifting loads, in particular, a compact lifting device,
    - with two hydraulic piston-cylinder units (2) that are arranged parallel to the lifting direction (3) and respectively contain a cylinder (4), in which a piston (5) mounted on a piston rod (6) is arranged in a displaceable fashion,
    - wherein each piston rod (6) extends out of the cylinder (4) on the side that faces away from the piston (5) and is supported on a support leg (7),
    - wherein the cylinders (4) are rigidly connected to one another by means of a bridge (14) on their ends that face the support legs (7),
    - wherein each cylinder (4) contains a guide sleeve (8) in the axial end section that faces the support leg (7), wherein said guide sleeve (8) is axially guided on the piston rod (6),
    characterized by the fact
    - that a lifting bracket (16) is or can be attached to said bridge (14),
    - that the bridge (14) is arranged on the guide sleeves (8).
  2. The lifting device according to Claim 1, characterized by the fact that the bridge (14) is arranged between the cylinders (4) and attached to opposing sides of the cylinders (4).
  3. The lifting device according to Claim 2, characterized by the fact
    - that the lifting bracket (16) is realized in a L-shaped fashion and comprises a rear part (17) that extends parallel to the lifting direction (3) and a loading part (18) that transversely protrudes from the rear part,
    - wherein the rear part (17) is or can be attached to the bridge (14), and
    - wherein the bridge (14) is arranged on the cylinders (4) in such a way that the bridge (14) and the rear part (17) of the lifting bracket (16) attached thereon are situated between the cylinders (4), namely such that the rear part (17) only protrudes, if at all, slightly beyond the cylinder (4) in the direction of the loading part (18).
  4. The lifting device according to one of Claims 1 to 3, characterized by the fact
    - that the piston rod (6) of at least one piston-cylinder unit (2) is connected to the support leg (7) and to the piston (5) in a rotationally rigid fashion, by the fact
    - that the piston (5) is arranged in the corresponding cylinder (4) such that it is rotatable about the longitudinal cylinder axis (13), and by the fact
    - that the support leg (7) is arranged such that it is rotatable relative to the cylinder (4) about the longitudinal cylinder axis (13).
  5. The lifting device according to one of Claims 1 to 4, characterized by the fact that the lifting bracket (16) is realized in the form of a separate part and contains a hook (19) for engaging the lifting bracket (16) with the bridge (14).
  6. The lifting device according to one of Claims 1 to 5, characterized by the fact that the guide sleeves (8) and the bridge (14) are realized in the form of an integral casting.
  7. The lifting device according to one of Claims 1 to 6, characterized by the fact that each cylinder (4) has a radial gap (10) between the cylinder (4) and the piston rod (6), namely in the region between the guide sleeve (8) and the cylinder end (9) facing away from the guide sleeve.
  8. The lifting device according to one of Claims 1 to 7, characterized by the fact that each piston (5) is arranged in the corresponding cylinder (4) with radial play.
  9. The lifting device according to one of Claims 1 to 8, characterized by the fact that both cylinders (4) carry a top plate (23) for supporting a load to be lifted on their cylinder ends (9) that face away from the support legs (7).
  10. The lifting device according to one of Claims 1 to 9, characterized by the fact that the two hydraulic piston-cylinder units (2) are hydraulically connected in parallel.
EP02027474A 2002-01-03 2002-12-10 Lifting device for lifting loads Expired - Lifetime EP1325882B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE20220613U DE20220613U1 (en) 2002-01-03 2002-12-10 Lifting jack for loads has parallel upright cylinders with pistons connected to piton rods atatched to base feet at lower ends

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10200094A DE10200094C1 (en) 2002-01-03 2002-01-03 Lifting device for lifting loads
DE10200094 2002-01-03

Publications (2)

Publication Number Publication Date
EP1325882A1 EP1325882A1 (en) 2003-07-09
EP1325882B1 true EP1325882B1 (en) 2006-04-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027474A Expired - Lifetime EP1325882B1 (en) 2002-01-03 2002-12-10 Lifting device for lifting loads

Country Status (4)

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EP (1) EP1325882B1 (en)
AT (1) ATE324346T1 (en)
DE (2) DE10200094C1 (en)
ES (1) ES2261585T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349389B3 (en) * 2003-10-21 2005-04-28 Karl-Heinz Jung Hydraulic lift has two lift brackets spaced from each other in lifting direction and protruding on either side for more varied use
CN108675193B (en) * 2018-07-04 2023-09-22 天津景天威力达液压千斤顶有限公司 Tilting-preventing hydraulic jack

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2163959A (en) * 1937-03-18 1939-06-27 John A Edeby Lifting jack
US2550674A (en) * 1944-04-21 1951-05-01 Joy Mfg Co Supporting column
US2508240A (en) * 1947-07-24 1950-05-16 Edward H Fenn Hydraulic jack
US3047269A (en) * 1960-08-30 1962-07-31 Modern Hydraulics Inc Hydraulic jack
DE6928444U (en) * 1969-07-17 1969-12-04 Georg Markus Kramp HYDRAULIC LIFTING EQUIPMENT
DE9312940U1 (en) 1993-08-28 1994-01-13 Jung Karl Heinz Hydraulic small lifting device
EP0720964A1 (en) * 1995-01-04 1996-07-10 Jin Soo Park Auxiliary device of a hydraulic jack

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DE10200094C1 (en) 2003-07-31
DE50206553D1 (en) 2006-06-01
ES2261585T3 (en) 2006-11-16
ATE324346T1 (en) 2006-05-15
EP1325882A1 (en) 2003-07-09

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