EP0960849A2 - Lifting device, in particular lifting platform for vehicles - Google Patents

Lifting device, in particular lifting platform for vehicles Download PDF

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Publication number
EP0960849A2
EP0960849A2 EP99109986A EP99109986A EP0960849A2 EP 0960849 A2 EP0960849 A2 EP 0960849A2 EP 99109986 A EP99109986 A EP 99109986A EP 99109986 A EP99109986 A EP 99109986A EP 0960849 A2 EP0960849 A2 EP 0960849A2
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EP
European Patent Office
Prior art keywords
lifting
cylinder unit
lifting cylinder
elements
rams
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99109986A
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German (de)
French (fr)
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EP0960849B1 (en
EP0960849A3 (en
Inventor
Wolfgang Dipl.-Ing. Naber
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Autop Maschinenbau GmbH
Original Assignee
AUTOPERKUTE Maschinenbau GmbH
Autop Maschinenbau GmbH
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Publication of EP0960849A2 publication Critical patent/EP0960849A2/en
Publication of EP0960849A3 publication Critical patent/EP0960849A3/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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
    • B66F7/20—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement

Definitions

  • the invention relates to a lifting device, in particular a lifting platform for Motor vehicles according to the preamble of claim 1.
  • Such lifting devices are used in practice as lifting platforms for motor vehicles used, usually two pairs of lifting elements in the form of Lift cylinders are provided, one of which is a pair of rails for receiving one motor vehicle standing on its wheels while the other Couple has a so-called wheel clearance, which on the motor vehicle body attacks and serves the motor vehicle, for example for a tire change, lifting with freely hanging wheels.
  • Lift cylinders are designed as underfloor lifts, the lifting cylinders for actuation the rails are arranged in a tub embedded in the workshop floor are.
  • the cladding tubes of the other pair of lifting cylinders are used to actuate the wheel-free receptacles firmly connected to the rails and are raised when lifting the Rails raised with.
  • the jacks are made by hydraulic cylinders formed, the piston rods reach through the rails and through Pull out the wheel clearances from their working cylinders, the one on the top End of the piston rods are attached regardless of the travel rails.
  • the lifting cylinders are hydraulic cylinders. That the wheel free shots actuating cylinder pair usually has a relatively large Diameter and works with low pressure, whereas the lifting cylinder of the the pair of rails carrying a smaller diameter and be operated with a correspondingly high pressure.
  • the invention is therefore concerned with the problem of a generic lifting device to create the most stable, insensitive to mechanical surface damage and is therefore low maintenance.
  • Lifting pistons are understood to mean any elements suitable for pushing up the cladding tubes, such as, for example, the piston rod of a pressure cylinder, but also a pressure cylinder in its entirety. Because the cladding tubes are designed as extendable elements, any sensitive elements, such as piston rods or hydraulic seals, are always spaced or protected within the cladding tubes by the length of the cladding tubes from the load-receiving area. When used in underfloor lifts, these seals are not accessible from the outside, ie above the floor surface, even in any lifting position.
  • the coupling of the lifting rams of a lifting cylinder unit with the cladding tubes of another lifting cylinder unit also ensures that the extendable elements of the lifting cylinder unit are always lifted together with those of the other lifting cylinder unit, but are also operable independently of the other lifting cylinder unit.
  • the lifting device shown in the drawing is a Underfloor lifting platform for motor vehicles, each with two lifting cylinder units has two lifting elements. It is of course also possible for one or more Lift cylinder units more than two lifting elements, for example four in have lifting elements arranged at the corner points of a rectangle and / or that there are more than two lifting cylinder units.
  • Each lifting element has a lifting ram and a cladding tube surrounding it.
  • the lifting elements are hydraulic cylinders, the cladding tubes through their working cylinders 1, 2 and the jacks through the piston rods 3, 4 of the hydraulic cylinders are formed.
  • the order of piston rod 3 and cylinder 1 is best seen in Fig. 3, where cut the leftmost cylinder in the illustration is shown.
  • This configuration in which the lifting elements directly by hydraulic cylinders are formed, the working cylinders of which then represent the extendable parts, is advantageous because a very simple design without additional Sheaths etc. are present and at the same time only those on their outer surface insensitive working cylinder in an area where with tools is handled.
  • the piston rods 3, 4 are equipped with hydraulic seals 5 against the interior 6 filled with hydraulic fluid, the working cylinder 1, 2 sealed. In the illustrated embodiment as an underfloor lifting platform The hydraulic seals 5 therefore remain below in each stroke position the bottom surface 7. The piston rods 3, 4 can therefore on their outer surface not be damaged and therefore no leakage of the hydraulic Create seals 5.
  • the cladding tubes can be used in an embodiment that is not shown not as a working cylinder, but as simple tubes that are open at the bottom be executed.
  • the lifting rams arranged in these can then in turn hydraulic cylinders consisting of piston rods and working cylinders, the cladding tubes either through the working cylinder or - in reverse Arrangement of the hydraulic cylinders - pushed up by the piston rods can be.
  • the hydraulic ones Seals between the working cylinder and piston rod are protected as either always below and through the inside of the cladding tubes are arranged protected. This embodiment allows complete hydraulic cylinders to be used as purchased parts.
  • the coupling of the two lifting cylinder units is as shown causes the piston rods 4 of a pair of lifting cylinders with their Bottom on with the working cylinders 1 of the other pair of lifting cylinders support, designed as lever elements 8 support parts.
  • the support parts can also have any other suitable shape. This configuration provides a simple and maintenance-friendly coupling option between the piston rods 4 and the working cylinders 1, which also ensures that one pair of lifting cylinders is always extended at least as far becomes like the other.
  • the support parts simultaneously form the synchronizing device of the other Pair of lifting cylinders, since the support parts firmly connect the two working cylinders 1, are essentially rigid traverse 9.
  • Advantageously takes over the synchronizing device thus designed simultaneously functions a safety device which, for example, prevents pressure failure one of the lifting cylinders sinks unhindered.
  • a safety device which, for example, prevents pressure failure one of the lifting cylinders sinks unhindered.
  • the traverse 9 consists of two interconnected Lever elements 8. The connection is formed by a joint 10, the one slight change in the positions of the lever elements 8 to each other allowed and thereby tilting movements between piston rod 3 and working cylinder 1 or prevented in the sealing area.
  • the arrangement shown has one Pair of lifting cylinders as an inner pair between the lifting elements of the other, outer stroke cylinder pair the particular advantage that the piston rods 4 of a pair of lifting cylinders automatically on which the working cylinder 1 of the other pair of lifting cylinders supporting crossbar 9 without it for this purpose, a special configuration or widening of those forming the support parts Traverse 9 is required. Since the traverse 9 can be made very narrow, are on their top locking washers 11 attached, the recesses in the middle have in which engage the piston rods 11 so that they do not can slide down from the traverse 9.
  • the piston rods 3 of the outer The pair of lifting cylinders are supported with their undersides on a fixed sole 12 from a tub 13, which is embedded in the floor, for example, of a workshop is.
  • the tub 13 is closed on all sides; in Fig. 1 were only for Clarification of the part of FIG Lifting device two walls of the tub 13 partially not shown.
  • the tub At its top, the tub has guides 14 in which the working cylinders 1,2 are slidably mounted.
  • the remaining top opening the tub 13 is closed by a manhole cover 15, which, however, can be removed for repair and maintenance purposes.
  • both lifting cylinder units are also different, for example by a cable pull system or the rack and pinion connection known from practice, can be formed, it is advantageous, if the synchronizing device of the inner lifting cylinder pair by one of them Working cylinder 2 connecting essentially rigid cross member 16 is formed there
  • all hydraulic cylinders are regarding Pressure and geometry are designed equally, and are done by one Pressure unit 17 fed and operated at the same pressure. Since no second Pressure unit is necessary, the tub 13 can be kept correspondingly narrow become. Compared to the known, which operates only one lifting cylinder unit Pressure units only need two further valves on the pressure unit 17 be provided. Since all lifting elements are operated at the same pressure , it is also not possible, for example, for the outer pair of lifting cylinders the inner pair of lifting cylinders, damaging or detaching the crossbar 16 pushes out of the guides 14. For the sake of clarity are the pressure lines 18 with which the pressure unit 17 with the connections 19 of the hydraulic cylinder is connected, partly not shown.
  • the lift shown is designed as a combined lift.
  • the outer working cylinder 1 on their top load receptacles in the form of rails 20 for receiving a motor vehicle standing on its wheels on.
  • the inner working cylinder 2 pass through the rails 20 and are on their top with load receptacles 21 - so-called wheel-free receptacles, which in the illustrated embodiment are designed as flat support receptacles are - connected to the body or frame of a motor vehicle attack and lift it with freely hanging wheels.
  • Any other combinations, for example of two different wheel clearances like swivel arm mounts with flat beam mounts are also possible.
  • FIG. 4 shows a lifting position in which only the wheel free receptacles are shown 21 are extended and, for example, a tire change is carried out can be.
  • the lifting device according to the invention has the advantage that the maximum possible Stroke through each of the lifting cylinder units or in several stages divided between the lifting cylinder units.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Vehicle Body Suspensions (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

A vehicle hoist has two main ramps (20) which lift the vehicle using main hydraulic rams and with a secondary hoist (21) powered by secondary rams to lift the vehicle off the main ramp ie. to access the wheels. The rams are arranged with the cylinders fitted to lift with the rams and with the main rams having their piston rods (3) secured in the base of the pit. The piston rods of the secondary rams are braced on a cross strut (9) which links the cylinders of the main rams. This ensures that the secondary rams move with the main rams.

Description

Die Erfindung betrifft eine Hubvorrichtung, insbesondere eine Hebebühne für Kraftfahrzeuge nach dem Oberbegriff des Anspruchs 1.The invention relates to a lifting device, in particular a lifting platform for Motor vehicles according to the preamble of claim 1.

Derartige Hubvorrichtungen werden in der Praxis als Hebebühnen für Kraftfahrzeuge eingesetzt, wobei in der Regel zwei Paare von Hubelementen in Form von Hubzylindern vorgesehen sind, von denen ein Paar Fahrschienen zur Aufnahme eines auf seinen Rädern stehenden Kraftfahrzeuges tragen, während das andere Paar eine sogenannte Radfreiaufnahme aufweist, die an der Kraftfahrzeugkarosserie angreift und dazu dient, das Kraftfahrzeug, beispielsweise für einen Reifenwechsel, mit frei hängenden Rädern anzuheben. Normalerweise sind diese Hebebühnen als Unterflurhebebühnen ausgestaltet, wobei die Hubzylinder zur Betätigung der Fahrschienen in einer in den Werkstattboden eingelassenen Wanne angeordnet sind.Such lifting devices are used in practice as lifting platforms for motor vehicles used, usually two pairs of lifting elements in the form of Lift cylinders are provided, one of which is a pair of rails for receiving one motor vehicle standing on its wheels while the other Couple has a so-called wheel clearance, which on the motor vehicle body attacks and serves the motor vehicle, for example for a tire change, lifting with freely hanging wheels. Usually these lifts are designed as underfloor lifts, the lifting cylinders for actuation the rails are arranged in a tub embedded in the workshop floor are.

Zum Anheben der Fahrschienen werden diese mit den durch die Kolbenstangen gebildeten Hubstempeln der betreffenden Hubzylinder nach oben gedrückt, wohingegen die durch die Arbeitszylinder gebildeten Hüllrohre unterhalb der Bodenoberfläche verbleiben.To lift the rails, they are lifted by the piston rods formed lifting stamps of the relevant lifting cylinder pressed up, whereas the cladding tubes formed by the working cylinders below the floor surface remain.

Zur Betätigung der Radfreiaufnahmen sind die Hüllrohre des anderen Hubzylinderpaares fest mit den Fahrschienen verbunden und werden beim Anheben der Fahrschienen mit angehoben. Die Hubstempel werden dabei durch Hydraulikzylinder gebildet, deren Kolbenstangen die Fahrschienen durchgreifen und durch Herausfahren aus ihren Arbeitszylindern die Radfreiaufnahmen, die am oberen Ende der Kolbenstangen befestigt sind, unabhängig von den Fahrschienen anheben.The cladding tubes of the other pair of lifting cylinders are used to actuate the wheel-free receptacles firmly connected to the rails and are raised when lifting the Rails raised with. The jacks are made by hydraulic cylinders formed, the piston rods reach through the rails and through Pull out the wheel clearances from their working cylinders, the one on the top End of the piston rods are attached regardless of the travel rails.

Um einen Gleichlauf, d.h. stets gleichhohes Ausfahren der beiden Hubelemente eines Hubzylinderpaares zu gewährleisten, sind die die Fahrschienen tragenden Hubelemente mit einer Traverse starr verbunden, während der Gleichlauf der die Radfreiaufnahmen tragenden Hubelemente durch mit den Radfreiaufnahmen verbundene Zahnstangen gewährleistet wird, die unterhalb der Bodenebene mittels einer gemeinsamen Welle zugeordneter Zahnritzel gekoppelt sind.To keep it in sync, i.e. Always extend the two lifting elements at the same height To ensure a pair of lifting cylinders are those that carry the rails Lifting elements rigidly connected to a traverse while the synchronism of the Lifting elements carrying wheel free receptacles by means of the wheel free receptacles Racks are guaranteed, which means below the floor level a common shaft associated pinion are coupled.

Bei den Hubzylindern handelt es sich um Hydraulikzylinder. Das die Radfreiaufnahmen betätigende Zylinderpaar hat in der Regel einen verhältnismäßig großen Durchmesser und arbeitet mit geringem Druck, wohingegen die Hubzylinder des die Fahrschienen tragenden Paares einen geringeren Durchmesser aufweisen und mit entsprechend großem Druck betrieben werden.The lifting cylinders are hydraulic cylinders. That the wheel free shots actuating cylinder pair usually has a relatively large Diameter and works with low pressure, whereas the lifting cylinder of the the pair of rails carrying a smaller diameter and be operated with a correspondingly high pressure.

Diese bekannten Hubvorrichtungen haben den Nachteil, daß sich die empfindlichen Kolbenstangen immer in der Nähe des Arbeitsbereiches befinden. Werden beispielsweise durch Abrutschen mit einem Werkzeug Riefen in die Oberfläche einer Kolbenstange eingebracht oder wird die Oberfläche der Kolbenstange anderweitig aufgerauht, so führt dies bei Bewegung der Kolbenstange nach kurzer Zeit zu einer Beschädigung der hydraulischen Dichtungen und damit zu Leckagen. Bei den die Radfreiaufnahmen betätigenden Hubzylindern sind die empfindlichen hydraulischen Dichtungen sogar unmittelbar an der Fahrschiene angeordnet und dadurch der Gefahr einer direkten Beschädigung ausgesetzt. These known lifting devices have the disadvantage that the sensitive Piston rods are always close to the work area. Become for example by slipping into the surface with a tool introduced a piston rod or the surface of the piston rod is otherwise roughened, this leads to a short movement of the piston rod Time to damage the hydraulic seals and thus leakage. The lifting cylinders actuating the wheel-free receptacles are sensitive hydraulic seals even arranged directly on the running rail and thereby exposed to the risk of direct damage.

Die Erfindung befaßt sich daher mit dem Problem, eine gattungsgemäße Hubvorrichtung zu schaffen, die stabil, unempfindlich gegen mechanische Oberflächenbeschädigungen und somit wartungsarm ist.The invention is therefore concerned with the problem of a generic lifting device to create the most stable, insensitive to mechanical surface damage and is therefore low maintenance.

Erfindungsgemäß wird dieses Problem durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 gelöst. Unter Hubstempel sind dabei jegliche zum Hinaufschieben der Hüllrohre geeigneten Elemente, wie beispielsweise die Kolbenstange eines Druckzylinders, aber auch ein Druckzylinder in seiner Gesamtheit, zu verstehen.
Dadurch, daß die Hüllrohre als ausfahrbare Elemente ausgestaltet sind, sind eventuell vorhandene empfindliche Elemente, wie Kolbenstangen oder hydraulische Dichtungen, stets um die Länge der Hüllrohre von dem lastaufnehmenden Bereich beabstandet oder geschützt innerhalb der Hüllrohre angeordnet. Bei Verwendung in Unterflur-Hebebühnen sind diese Dichtungen sogar in keiner Hubposition von außen, d.h. oberhalb der Bodenoberfläche zugänglich. Durch die Koppelung der Hubstempel einer Hubzylindereinheit mit den Hüllrohren einer anderen Hubzylindereinheit wird ferner gewährleistet, daß die ausfahrbaren Elemente der einen Hubzylindereinheit stets zusammen mit denen der anderen Hubzylindereinheit angehoben werden, darüber hinaus aber auch unabhängig von der anderen Hubzylindereinheit betätigbar sind.According to the invention, this problem is solved by a device having the features of claim 1. Lifting pistons are understood to mean any elements suitable for pushing up the cladding tubes, such as, for example, the piston rod of a pressure cylinder, but also a pressure cylinder in its entirety.
Because the cladding tubes are designed as extendable elements, any sensitive elements, such as piston rods or hydraulic seals, are always spaced or protected within the cladding tubes by the length of the cladding tubes from the load-receiving area. When used in underfloor lifts, these seals are not accessible from the outside, ie above the floor surface, even in any lifting position. The coupling of the lifting rams of a lifting cylinder unit with the cladding tubes of another lifting cylinder unit also ensures that the extendable elements of the lifting cylinder unit are always lifted together with those of the other lifting cylinder unit, but are also operable independently of the other lifting cylinder unit.

Weitere Vorteile und Einzelheiten ergeben sich aus den Unteransprüchen und einem in der Zeichnung darstellten Ausführungsbeispiel der Erfindung, das im folgenden erläutert wird; es zeigen:

Fig. 1
eine perspektivische Ansicht einer erfindungsgemäßen Hubvorrichtung,
Fig. 2
eine Frontalansicht der Vorrichtung nach Fig. 1 in vollständig versenkter Position,
Fig. 3
die Vorrichtung nach Fig. 2 in teilweise ausgefahrener Position der äußeren Hubelemente,
Fig. 4
die Vorrichtung nach Fig. 1 in teilweise ausgefahrener Position der inneren Hubelemente und
Fig. 5
den Gegenstand nach Fig. 2 in teilweise ausgefahrener Position sowohl der inneren, als auch der äußeren Hubelemente.
Further advantages and details emerge from the subclaims and an exemplary embodiment of the invention illustrated in the drawing, which is explained below; show it:
Fig. 1
a perspective view of a lifting device according to the invention,
Fig. 2
2 shows a frontal view of the device according to FIG. 1 in a fully retracted position,
Fig. 3
2 in the partially extended position of the outer lifting elements,
Fig. 4
1 in the partially extended position of the inner lifting elements and
Fig. 5
2 in the partially extended position of both the inner and the outer lifting elements.

Bei der in der Zeichnung dargestellten Hubvorrichtung handelt es sich um eine Unterflur-Hebebühne für Kraftfahrzeuge, die zwei Hubzylindereinheiten mit je zwei Hubelementen aufweist. Es ist natürlich auch möglich, daß eine oder mehrere Hubzylindereinheiten mehr als zwei Hubelemente, beispielsweise vier in den Eckpunkten eines Rechtecks angeordnete Hubelemente aufweisen und/oder daß mehr als zwei Hubzylindereinheiten vorhanden sind.The lifting device shown in the drawing is a Underfloor lifting platform for motor vehicles, each with two lifting cylinder units has two lifting elements. It is of course also possible for one or more Lift cylinder units more than two lifting elements, for example four in have lifting elements arranged at the corner points of a rectangle and / or that there are more than two lifting cylinder units.

Jedes Hubelement hat einen Hubstempel und ein diesen umgebendes Hüllrohr. Bei der dargestellten Ausführungsform sind die Hubelemente Hydraulikzylinder, wobei die Hüllrohre durch deren Arbeitszylinder 1,2 und die Hubstempel durch die Kolbenstangen 3,4 der Hydraulikzylinder gebildet werden. Die Anordnung von Kolbenstange 3 und Arbeitszylinder 1 ist am besten in Fig. 3 zu erkennen, wo der in der Abbildung am weitesten links angeordnete Hubzylinder geschnitten dargestellt ist.Each lifting element has a lifting ram and a cladding tube surrounding it. In the embodiment shown, the lifting elements are hydraulic cylinders, the cladding tubes through their working cylinders 1, 2 and the jacks through the piston rods 3, 4 of the hydraulic cylinders are formed. The order of piston rod 3 and cylinder 1 is best seen in Fig. 3, where cut the leftmost cylinder in the illustration is shown.

Diese Ausgestaltung, bei der die Hubelemente unmittelbar durch Hydraulikzylinder gebildet werden, deren Arbeitszylinder dann die ausfahrbaren Teilen darstellen, ist insoweit vorteilhaft, da eine sehr einfache Ausführung ohne zusätzliche Ummantelungen etc. vorliegt und gleichzeitig nur die an ihrer äußeren Oberfläche unempfindlichen Arbeitszylinder in einem Bereich liegen, in dem mit Werkzeug hantiert wird. Die Kolbenstangen 3,4 sind mit hydraulischen Dichtungen 5 gegen den mit Hydraulikflüssigkeit gefüllen Innenraum 6 der Arbeitszylinder 1,2 abgedichtet. Bei der dargestellten Ausführungsform als Unterflur-Hebebühne verbleiben die hydraulischen Dichtungen 5 daher in jeder Hubposition unterhalb der Bodenoberfläche 7. Die Kolbenstangen 3,4 können daher an ihrer Außenoberfläche nicht beschädigt werden und somit auch keine Leckagen der hydraulischen Dichtungen 5 hervorrufen.This configuration, in which the lifting elements directly by hydraulic cylinders are formed, the working cylinders of which then represent the extendable parts, is advantageous because a very simple design without additional Sheaths etc. are present and at the same time only those on their outer surface insensitive working cylinder in an area where with tools is handled. The piston rods 3, 4 are equipped with hydraulic seals 5 against the interior 6 filled with hydraulic fluid, the working cylinder 1, 2 sealed. In the illustrated embodiment as an underfloor lifting platform The hydraulic seals 5 therefore remain below in each stroke position the bottom surface 7. The piston rods 3, 4 can therefore on their outer surface not be damaged and therefore no leakage of the hydraulic Create seals 5.

Alternativ dazu können bei einer nicht dargestellten Ausführungsform die Hüllrohre nicht als Arbeitszylinder, sondern als einfache nach unten offene Rohre ausgeführt sein. Die in diesen angeordneten Hubstempel können dann wiederum aus Kolbenstangen und Arbeitszylindern bestehende Hydraulikzylinder sein, wobei die Hüllrohre wahlweise durch die Arbeitszylinder oder - bei umgekehrter Anordnung der Hydraulikzylinder - durch die Kolbenstangen nach oben gedrückt werden können. Auch bei dieser Ausführungsform sind die hydraulischen Dichtungen zwischen Arbeitszylinder und Kolbenstange geschützt, da sie entweder stets unter der Bodenoberfläche oder innerhalb der Hüllrohre und durch diese geschützt angeordnet sind. Diese Ausführungsform erlaubt es, komplette Hydraulikzylinder als Zukaufteile zu verwenden.Alternatively, the cladding tubes can be used in an embodiment that is not shown not as a working cylinder, but as simple tubes that are open at the bottom be executed. The lifting rams arranged in these can then in turn hydraulic cylinders consisting of piston rods and working cylinders, the cladding tubes either through the working cylinder or - in reverse Arrangement of the hydraulic cylinders - pushed up by the piston rods can be. In this embodiment, too, the hydraulic ones Seals between the working cylinder and piston rod are protected as either always below and through the inside of the cladding tubes are arranged protected. This embodiment allows complete hydraulic cylinders to be used as purchased parts.

Die Koppelung der beiden Hubzylindereinheiten wird wie dargestellt dadurch bewirkt, daß sich die Kolbenstangen 4 des einen Hubzylinderpaares mit ihren Unterseiten auf mit den Arbeitszylindern 1 des andere Hubzylinderpaares fest verbundenen, als Hebelelemente 8 ausgebildeten Stützteilen abstützen. Selbstverständlich können die Stützteile auch jede andere geeignete Form aufweisen. Diese Ausgestaltung stellt eine einfache und wartungsfreundliche Kopplungsmöglichkeit zwischen den Kolbenstangen 4 und den Arbeitszylindern 1 dar, die zudem gewährleistet, daß das eine Hubzylinderpaar stets mindestens soweit ausgefahren wird, wie das andere.The coupling of the two lifting cylinder units is as shown causes the piston rods 4 of a pair of lifting cylinders with their Bottom on with the working cylinders 1 of the other pair of lifting cylinders support, designed as lever elements 8 support parts. Of course the support parts can also have any other suitable shape. This configuration provides a simple and maintenance-friendly coupling option between the piston rods 4 and the working cylinders 1, which also ensures that one pair of lifting cylinders is always extended at least as far becomes like the other.

Die Stützteile bilden dabei gleichzeitig die Gleichlaufeinrichtung des anderen Hubzylinderpaares, da die Stützteile eine die beiden Arbeitszylinder 1 fest verbindende, im wesentlichen starre Traverse 9 sind. In vorteilhafter Weise übernimmt die so ausgebildete Gleichlaufeinrichtung dabei gleichzeitig die Funktion einer Sicherheitseinrichtung, die beispielsweise verhindert, daß bei Druckversagen des einen Hubzylinders dieser ungehindert hinuntersackt. Natürlich kann die Sicherheitseinrichtung aber auch anders, z.B. durch Rastsperren, verwirklicht werden. Wie dargestellt besteht die Traverse 9 aus zwei miteinander verbundenen Hebelelementen 8. Die Verbindung wird durch ein Gelenk 10 gebildet, das eine geringfügige Veränderung der Positionen der Hebelelemente 8 zueinander erlaubt und dadurch Verkantungsbewegungen zwischen Kolbenstange 3 und Arbeitszylinder 1 oder im Dichtungsbereich verhindert. The support parts simultaneously form the synchronizing device of the other Pair of lifting cylinders, since the support parts firmly connect the two working cylinders 1, are essentially rigid traverse 9. Advantageously takes over the synchronizing device thus designed simultaneously functions a safety device which, for example, prevents pressure failure one of the lifting cylinders sinks unhindered. Of course it can Safety device but also different, e.g. by locking stops become. As shown, the traverse 9 consists of two interconnected Lever elements 8. The connection is formed by a joint 10, the one slight change in the positions of the lever elements 8 to each other allowed and thereby tilting movements between piston rod 3 and working cylinder 1 or prevented in the sealing area.

Obschon jegliche Anordnung der Hubelemente, wie z.B. hintereinander liegend oder diagonal versetzt, möglich ist, hat die dargestellte Anordnung des einen Hubzylinderpaares als inneres Paar zwischen den Hubelementen des anderen, äußeren Hubzylinderpaares den besonderen Vorteil, daß sich dabei die Kolbenstangen 4 des einen Hubzylinderpaares automatisch auf der die Arbeitszylinder 1 des anderen Hubzylinderpaares verbindenden Traverse 9 abstützen, ohne daß es dazu einer besonderen Ausgestaltung oder Verbreiterung der die Stützteile bildenden Traverse 9 bedarf. Da die Traverse 9 sehr schmal ausgeführt sein kann, sind an ihrer Oberseite Sicherungsscheiben 11 angebracht, die mittig Ausnehmungen aufweisen, in die die Kolbenstangen 11 eingreifen, so daß diese nicht von der Traverse 9 hinunterrutschen können. Die Kolbenstangen 3 des äußeren Hubzylinderpaares stützen sich mit ihren Unterseiten auf einer ortsfesten Sohle 12 einer Wanne 13 ab, die in den Boden beispielsweise einer Werkstatt eingelassen ist. Die Wanne 13 ist zu allen Seiten geschlossen; in Fig. 1 wurden lediglich zur Verdeutlichung des unterhalb der Bodenoberfläche 7 angeordneten Teils der Hubvorrichtung zwei Wände der Wanne 13 teilweise nicht dargestellt.Although any arrangement of the lifting elements, e.g. lying in a row or diagonally offset, is possible, the arrangement shown has one Pair of lifting cylinders as an inner pair between the lifting elements of the other, outer stroke cylinder pair the particular advantage that the piston rods 4 of a pair of lifting cylinders automatically on which the working cylinder 1 of the other pair of lifting cylinders supporting crossbar 9 without it for this purpose, a special configuration or widening of those forming the support parts Traverse 9 is required. Since the traverse 9 can be made very narrow, are on their top locking washers 11 attached, the recesses in the middle have in which engage the piston rods 11 so that they do not can slide down from the traverse 9. The piston rods 3 of the outer The pair of lifting cylinders are supported with their undersides on a fixed sole 12 from a tub 13, which is embedded in the floor, for example, of a workshop is. The tub 13 is closed on all sides; in Fig. 1 were only for Clarification of the part of FIG Lifting device two walls of the tub 13 partially not shown.

An ihrer Oberseite weist die Wanne Führungen 14 auf, in denen die Arbeitszylinder 1,2 verschieblich gelagert sind. Die noch verbleibende oberseitige Öffnung der Wanne 13 ist durch einen Schachtdeckel 15 verschlossen, der jedoch zu Reparatur- und Wartungszwecken entfernt werden kann.At its top, the tub has guides 14 in which the working cylinders 1,2 are slidably mounted. The remaining top opening the tub 13 is closed by a manhole cover 15, which, however, can be removed for repair and maintenance purposes.

Obschon die Gleichlaufeinrichtungen beider Hubzylindereinheiten auch anders, beispielsweise durch ein Seilzugsystem oder die aus der Praxis bekannte Zahnstangen-Zahnritzelverbindung, ausgebildet sein kann, ist es vorteilhaft, wenn auch die Gleichlaufeinrichtung des inneren Hubzylinderpaares durch eine dessen Arbeitszylinder 2 verbindende im wesentliche starre Traverse 16 gebildet wird, da Although the synchronization devices of both lifting cylinder units are also different, for example by a cable pull system or the rack and pinion connection known from practice, can be formed, it is advantageous, if the synchronizing device of the inner lifting cylinder pair by one of them Working cylinder 2 connecting essentially rigid cross member 16 is formed there

Zahnstangen und Zahnritzel immer einem erhöhten Verschleiß unterliegen und Zahnstangen ferner Verschmutzungen in den Bereich der Wanne 13 einbringen. Darüber hinaus stellt die Traverse 16 eine Sicherheit dagegen dar, daß die Arbeitszylinder 2 mit ihrem unteren Ende aus den Führungen 14 herausgeschoben werden, da ein Ausfahren der inneren Arbeitszylinder 2 nur so weit möglich ist, bis die Traverse 16 an der Unterseite der Führungen 14 anschlägt.Racks and pinions are always subject to increased wear and tear Also bring racks into the area of the tub 13. In addition, the traverse 16 represents a security against the fact that the working cylinder 2 pushed out of the guides 14 with their lower end because the extension of the inner working cylinder 2 is only possible as far until the cross member 16 strikes the underside of the guides 14.

Bei der dargestellten Ausführungsform sind alle Hydraulikzylinder hinsichtlich Druck und Geometrie gleich ausgelegt, und werden von einem einzigen Druckaggregat 17 gespeist und mit demselben Druck betrieben. Da kein zweites Druckaggregat notwendig ist, kann die Wanne 13 entsprechend schmal gehalten werden. Gegenüber den bekannten, nur eine Hubzylindereinheit betreibenden Druckaggregaten müssen an dem Druckaggregat 17 lediglich zwei weitere Ventile vorgesehen werden. Da sämtliche Hubelemente mit demselben Druck betrieben werden, ist es auch nicht möglich, daß beispielsweise das äußere Hubzylinderpaar das innere Hubzylinderpaar unter Beschädigung oder Ablösung der Traverse 16 aus den Führungen 14 herausdrückt. Aus Gründen der Übersichtlichkeit sind die Druckleitungen 18, mit denen das Druckaggregat 17 mit den Anschlüssen 19 der Hydraulikzylinder verbunden ist, teilweise nicht dargestellt.In the illustrated embodiment, all hydraulic cylinders are regarding Pressure and geometry are designed equally, and are done by one Pressure unit 17 fed and operated at the same pressure. Since no second Pressure unit is necessary, the tub 13 can be kept correspondingly narrow become. Compared to the known, which operates only one lifting cylinder unit Pressure units only need two further valves on the pressure unit 17 be provided. Since all lifting elements are operated at the same pressure , it is also not possible, for example, for the outer pair of lifting cylinders the inner pair of lifting cylinders, damaging or detaching the crossbar 16 pushes out of the guides 14. For the sake of clarity are the pressure lines 18 with which the pressure unit 17 with the connections 19 of the hydraulic cylinder is connected, partly not shown.

Die abgebildete Hebebühne ist als kombinierte Hebebühne ausgelegt. Dazu weisen die äußeren Arbeitszylinder 1 an ihrer Oberseite Lastaufnahmen in Form von Fahrschienen 20 zur Aufnahme eines auf seinen Rädern stehenden Kraftfahrzeuges auf. Die inneren Arbeitszylinder 2 durchgreifen die Fahrschienen 20 und sind an ihrer Oberseite mit Lastaufnahmen 21 - sogenannten Radfreiaufnahmen, die bei der dargestellten Ausführungsform als Flachträgeraufnahmen ausgestaltet sind - verbunden, die an der Karosserie oder dem Rahmen eines Kraftfahrzeuges angreifen und dieses mit frei hängenden Rädern anheben können. Beliebige andere Kombinationen, beispielsweise von zwei verschiendenen Radfreiaufnahmen wie Schwenkarmaufnahmen mit Flachträgeraufnahmen, sind ebenfalls möglich.The lift shown is designed as a combined lift. To have the outer working cylinder 1 on their top load receptacles in the form of rails 20 for receiving a motor vehicle standing on its wheels on. The inner working cylinder 2 pass through the rails 20 and are on their top with load receptacles 21 - so-called wheel-free receptacles, which in the illustrated embodiment are designed as flat support receptacles are - connected to the body or frame of a motor vehicle attack and lift it with freely hanging wheels. Any other combinations, for example of two different wheel clearances like swivel arm mounts with flat beam mounts are also possible.

In Fig 4 ist eine Hubposition dargestellt, bei der lediglich die Radfreiaufnahmen 21 ausgefahren sind und so beispielsweise ein Reifenwechsel durchgeführt werden kann. In der in Fig. 3 dargestellten Hubposition würde ein angehobenes Kraftfahrzeug mit seinen Rädern auf den Fahrschienen 20 stehen, da die Radfreiaufnahmen 21 nicht über die Fahrschienen 20 hinaus angehoben sind. In dieser Position kann beispielsweise unter dem Kraftfahrzeug gearbeitet werden. Bei der in Fig. 5 dargestellten Hubposition sind die Fahrschienen 20 und die Radfreiaufnahmen 21 noch darüber hinaus ausgefahren. Hier wurde beispielsweise zunächst unterhalb des Kraftfahrzeuges gearbeitet und anschließend das Kraftfahrzeug durch die Radfreiaufnahmen 21 an seiner Karosserie noch weiter angehoben, um Arbeiten vorzunehmen, bei denen die Räder frei hängen müssen.4 shows a lifting position in which only the wheel free receptacles are shown 21 are extended and, for example, a tire change is carried out can be. In the lifting position shown in Fig. 3, a raised Motor vehicle with its wheels on the rails 20, because the wheel clearances 21 are not raised beyond the rails 20. In this Position can be worked under the motor vehicle, for example. In the 5 are the travel rails 20 and the wheel free receptacles 21 extended further. Here, for example, was first worked below the motor vehicle and then the motor vehicle raised even further by the wheel recesses 21 on its body, to do work where the wheels have to hang freely.

Die erfindungsgemäße Hubvorrichtung hat den Vorteil, daß der maximal mögliche Hub durch jede der Hubzylindereinheiten oder auch in mehreren Stufen aufgeteilt auf die Hubzylindereinheiten ausgeführt werden kann.The lifting device according to the invention has the advantage that the maximum possible Stroke through each of the lifting cylinder units or in several stages divided between the lifting cylinder units.

Claims (13)

Hubvorrichtung, insbesondere Hebebühne für Kraftfahrzeuge, mit zumindest zwei Hubzylindereinheiten von je wenigstens zwei druckbeaufschlagten Hubelementen, die jeweils einen Hubstempel und wenigstens ein diesen umgebendes Hüllrohr aufweisen, wobei die Hubelemente jeder Hubzylindereinheit untereinander durch eine Gleichlaufeinrichtung verbunden sind, dadurch gekennzeichnet , daß die Hüllrohre jedes Hubelementes als ausfahrbare Elemente ausgestaltet sind und daß die Hubstempel einer Hubzylindereinheit mit den Hüllrohren einer anderen Hubzylindereinheit hinsichtlich ihrer Hubbewegung gekoppelt sind.Lifting device, in particular lifting platform for motor vehicles, with at least two lifting cylinder units, each of at least two pressurized lifting elements, each having a lifting ram and at least one cladding tube surrounding the latter, the lifting elements of each lifting cylinder unit being connected to one another by a synchronizing device, characterized in that the cladding tubes of each lifting element are designed as extendable elements and that the lifting rams of a lifting cylinder unit are coupled with the cladding tubes of another lifting cylinder unit with regard to their lifting movement. Hubvorrichtung nach Anspruch 1, dadurch gekennzeichnet , daß die Hub-elemente Hydraulikzylinder sind, wobei die Hüllrohre durch deren Arbeitszylinder (1,2) und die Hubstempel durch deren Kolbenstangen (3,4) gebildet werden.Lifting device according to claim 1, characterized in that the lifting elements are hydraulic cylinders, the cladding tubes being formed by their working cylinders (1, 2) and the lifting rams by their piston rods (3, 4). Hubvorrichtung nach Anspruch 1, dadurch gekennzeichnet , daß die Hubstempel durch Hydraulikzylinder gebildet werden, durch deren Arbeitszylinder oder durch deren Kolbenstangen die Hüllrohre anhebbar und absenkbar sind.Lifting device according to claim 1, characterized in that the lifting rams are formed by hydraulic cylinders, by means of whose working cylinders or by means of their piston rods, the cladding tubes can be raised and lowered. Hubvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet , daß sich die Hubstempel der einen Hubzylindereinheit mit ihren Unterseiten auf mit den ausfahrbaren Elementen der anderen Hubzylindereinheit verbundenen Stützteilen abstützen und sich die Hubstempel der anderen Hubzylindereinheit auf ihrer Unterseite auf einer ortsfesten Sohle (12) der Hubvorrichtung abstützen.Lifting device according to one of claims 1 to 3, characterized in that the lifting rams of one lifting cylinder unit are supported with their undersides on supporting parts connected to the extendable elements of the other lifting cylinder unit and the lifting rams of the other lifting cylinder unit are supported on their underside on a fixed base (12). support the lifting device. Hubvorrichtung nach einem der Ansprüch 1 bis 4, dadurch gekennzeichnet , daß zumindest die Gleichlaufeinrichtung der anderen Hubzylindereinheit als im wesentlichen starre Traverse (9) ausgebildet ist.Lifting device according to one of Claims 1 to 4, characterized in that at least the synchronizing device of the other lifting cylinder unit is designed as an essentially rigid traverse (9). Hubvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Traverse (9) die mit den ausfahrbaren Elementen der anderen Hubzylindereinheit verbundenen Stützteile bildet.Lifting device according to claim 5, characterized in that the crossmember (9) forms the supporting parts connected to the extendable elements of the other lifting cylinder unit. Hubvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet , daß jede Gleichlaufeinrichtung als im wesentlichen starre Traverse (9,16) ausgebildet ist.Lifting device according to one of claims 1 to 6, characterized in that each synchronizing device is designed as an essentially rigid traverse (9, 16). Hubvorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet , daß wenigstens eine Traverse (9,16) aus zwei miteinander verbundenen und in ihrer Position zueinander geringfügig veränderbaren Hebelelementen (8) besteht.Lifting device according to one of claims 5 to 7, characterized in that at least one cross member (9, 16) consists of two lever elements (8) which are connected to one another and can be changed slightly in their position relative to one another. Hubvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet , daß die eine Hubzylindereinheit als innere Einheit zwischen den Hubelementen der anderen, äußeren Hubzylindereinheit angeordnet ist.Lifting device according to one of claims 1 to 8, characterized in that one lifting cylinder unit is arranged as an inner unit between the lifting elements of the other, outer lifting cylinder unit. Hubvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet , daß die Hüllrohre der einen Hubzylindereinheit an ihrer Oberseite Lastaufnahmen (21) für die Aufnahme einer Kraftfahrzeugkarosserie oder eines Kraftfahrzeugrahmens und die Hüllrohre der anderen Hubzylindereinheit an ihrer Oberseite Lastaufnahmen in Form von Fahrschienen (20) aufweisen.Lifting device according to one of claims 1 to 9, characterized in that the cladding tubes of the one lifting cylinder unit on the upper side load receptacles (21) for receiving a motor vehicle body or a motor vehicle frame and the cladding tubes of the other lifting cylinder unit on their upper side load receiving means in the form of rails (20) exhibit. Hubvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet , daß die Hüllrohre sowohl der einen als auch der anderen Hubzylindereinheit an ihrer Oberseite Lastaufnahmen für die Aufnahme einer Kraftfahrzeugkarosserie aufweisen, wobei die Lastaufnahmen der einen Hubzylindereinheit als Schwenkarmaufnahmen und die der anderen Hubzylindereinheit als Flachträgeraufnahmen ausgestaltet sind oder umgekehrt.Lifting device according to one of claims 1 to 10, characterized in that the cladding tubes of both the one and the other lifting cylinder unit have load receptacles on their upper side for receiving a motor vehicle body, the load receptacles of the one lifting cylinder unit being designed as swivel arm receptacles and those of the other lifting cylinder unit being designed as flat carrier receptacles are or vice versa. Hubvorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet , daß sämtliche Hubelemente von demselben Druckaggregat (17) gespeist und mit demselben Druck betrieben werden.Lifting device according to one of claims 1 to 11, characterized in that all lifting elements are fed by the same pressure unit (17) and operated at the same pressure. Hubvorrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet , daß sie genau zwei Hubzylindereinheiten aufweist, die jeweils durch ein Hubzylinderpaar gebildet werden.Lifting device according to one of claims 1 to 12, characterized in that it has exactly two lifting cylinder units, each of which is formed by a pair of lifting cylinders.
EP99109986A 1998-05-29 1999-05-21 Lifting device, in particular lifting platform for vehicles Expired - Lifetime EP0960849B1 (en)

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DE19824081A DE19824081C2 (en) 1998-05-29 1998-05-29 Lifting device, in particular lifting platform for motor vehicles
DE19824081 1998-05-29

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AT (1) ATE323061T1 (en)
DE (2) DE19824081C2 (en)
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EP3961182A1 (en) * 2020-08-26 2022-03-02 MAHA Maschinenbau Haldenwang GmbH & Co. KG Motor vehicle test bench for mounting in a foundation
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EP3961182A1 (en) * 2020-08-26 2022-03-02 MAHA Maschinenbau Haldenwang GmbH & Co. KG Motor vehicle test bench for mounting in a foundation
RU226136U1 (en) * 2024-01-17 2024-05-22 Акционерное общество "Рузаевский завод химического машиностроения"(АО "Рузхиммаш") DEVICE FOR LIFTING LOAD

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EP0960849B1 (en) 2006-04-12
DE59913319D1 (en) 2006-05-24
ATE323061T1 (en) 2006-04-15
DE19824081C2 (en) 2001-09-13
ES2260868T3 (en) 2006-11-01
EP0960849A3 (en) 2002-03-20
DK0960849T3 (en) 2006-08-14
DE19824081A1 (en) 1999-12-09

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