EP1184332B1 - Lifting platform for vehicles - Google Patents

Lifting platform for vehicles Download PDF

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Publication number
EP1184332B1
EP1184332B1 EP01117665A EP01117665A EP1184332B1 EP 1184332 B1 EP1184332 B1 EP 1184332B1 EP 01117665 A EP01117665 A EP 01117665A EP 01117665 A EP01117665 A EP 01117665A EP 1184332 B1 EP1184332 B1 EP 1184332B1
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EP
European Patent Office
Prior art keywords
lifting platform
column
prime mover
platform according
shaft
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.)
Expired - Lifetime
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EP01117665A
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German (de)
French (fr)
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EP1184332A1 (en
Inventor
Winfried Rauch
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Maha Maschinenbau Haldenwang GmbH and Co KG
Maha GmbH and Co KG
Original Assignee
Maha Maschinenbau Haldenwang GmbH and Co KG
Maha GmbH and Co KG
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Publication of EP1184332A1 publication Critical patent/EP1184332A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/02Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars

Definitions

  • the invention relates to vehicle lifts of the type specified in the preamble of claims 1 and 6 respectively.
  • Such lifts are used in workshops, inspection companies, etc. for performing maintenance, repair and inspection of motor vehicles.
  • a retracted into the lift vehicle motor vehicle is raised to a height desired by the fitter to perform work on the base of the vehicle more comfortable.
  • Conventional car lifts for motor vehicles usually work on the Hubstempel850, the principle of the scissors or the rack or screw spindle principle.
  • both vertical guides are connected by a rope from the first vertical guide via a first lower pulley, formed between two uprights bottom channel, a second lower pulley in the lower part of the second stator and a third Guide roller in the upper part of the second stator to the second vertical guide runs.
  • Underground lifts for two-lane motor vehicles are known in a variety of designs, which are also used in repair and inspection operations for lifting a retracted motor vehicle.
  • These lifts regularly have a cassette that is set in a narrow pit in the ground foundation, eg embedded in concrete.
  • two lifting pistons are installed on their narrow sides, which have vehicle supports in the form of ramp-on flat carriers or of telescopic support arms at their upper ends projecting from the pit.
  • Each lifting ram is assigned a hydraulic lifting cylinder, the piston extends when pressurized and moves the associated lifting ram in stationary installed guides upwards.
  • od od flexible links such as link chains, ropes, straps.
  • tension members for lifting of e.g. Use platforms, pushers, etc. (DE 2 317 695 A, FR 1 145 939).
  • the object of the invention is to provide a technically simple lift for vehicles that can be inexpensively manufactured with low space requirements and operated with low maintenance, but also fully meets the existing safety requirements.
  • the two-stand lift according to the invention is characterized in that each provided a separate pull cord per stand is, with the use of only a single drive unit whose torque is evenly distributed to the drive links of the two similar tension cords to exert on the respective support arms equal lifting forces and ensure their synchronization.
  • This torque split is achieved in a simple manner by the shaft which extends between the uprights and is driven via a drive member coupled to the drive unit via a gear train, for example a sprocket.
  • the shaft can be arranged either at upper extensions of the two stands or at the lower end of the stand, if necessary, at or below the floor level.
  • the drive unit which can be arranged together with its transmission elements either at the upper end of a stand or at its lower part.
  • An expedient development of the invention is characterized in that the drive unit itself or an auxiliary drive can also be manually operated in order to be able to manually lower a raised vehicle in the event of a malfunction of the motorized lifting system.
  • braking devices are provided for each support arm, which are automatically activated upon occurrence of a critical operating condition, for example, at a fraction of the tension cord or at an excessive descent speed and shut down the support arms.
  • an additional synchronization control may be provided, e.g. triggers an emergency stop when the two support arms are moved at different speeds and / or are at different altitudes.
  • the so-called pulley principle can be applied, wherein the tension cord is guided over a deflection arm mounted on the support arm, via a roller mounted on the upper end of the stand or a sprocket runs and arranged on a lower end of the stator driven drum or the like is wound up.
  • the use of an endless chain as a tension member is possible.
  • the two-stand lift according to FIG. 1 is designed for two-lane vehicles, in particular cars, and has two stands 1a, 1b, which are firmly anchored in the ground foundation 3 via an associated foot 2a, 2b.
  • a horizontal support arm 4a, 4b is arranged vertically movable.
  • Each support arm 4a, 4b is telescopically extendable and has at its end a support 5a, 5b.
  • each support arm 4a, 4b is fixed to a vertical guide 6a, 6b, which in the illustrated embodiment at least partially encloses the respective uprights 1a, 1b, the length of these guides 6a, 6b being a tilt-free mounting of the support arms 4a, 4b even when the vehicle is upright and their smooth shifts guaranteed.
  • each stand 1a, 1b is a stable extension spar 7a, 7b, each with an upper bearing 8a, 8b for a transverse shaft 9, which carries a sprocket 10 at its right in Fig. 1 end.
  • a drive unit in the form of an electric motor 11 is installed, via a sprocket 12 and an over both sprockets 10 and 12 running endless chain 13 the transverse shaft 9 is set in rotary motion.
  • a tensile strand 15a, 15b which may be a steel cable, a belt or a link chain.
  • each tensile strand 15a, 15b is a steel cable which is attached at its one end via a terminal 16a, 16b to the associated vertical guide 6a, 6b and whose respective other end part is fixed to the associated disc or drum 14a, 14b ,
  • the transverse shaft 9 is rotated via the chain drive 10 to 13 together with the two discs or drums 14a, 14b, so that both tension cords 15a, 15b wound at the same speed and thereby the two support arms 4a, 4b are raised synchronously.
  • the lowering movement of the support arms 4a, 4b is expediently carried out by its own weight or the additional weight of an overlying vehicle with a predetermined speed by a brake or the electric motor 11.
  • the second stator with the additional units according to the embodiment of FIG. 1 is the same.
  • the electric motor 11 is arranged here together with the chain drive 10, 12, 13 in a box-shaped housing at the lower end of the designed as a hollow profile stand 1b.
  • the transverse shaft 9 extends in a groove formed in the base foundation 3 groove 21, which is covered by a plate 22.
  • the transverse shaft sitting non-rotatably drums, of which only the right-side drum 14b is shown here.
  • a steel cable 15b extending within the hollow profile is likewise used as a tensile strand, which is fixed at one end at 16b to the lower part of the vertical guide 6b and runs over a deflecting disc 23 rotatably mounted in the upper end region of the stator 1b, wherein the stranded part shown in dashed lines is then wound on the bottom side arranged drum 14b.
  • the so-called pulley principle can be applied in a simple manner by the one end of the traction cable 15 b is fixed in the upper part of the stator 1 b and in the longitudinal guide 6 b, a further deflection roller is arranged, via which the steel cable then runs to the upper deflection plate 23.
  • FIG. 2 requires by the elaborate in the ground foundation groove 21 and their cover an increased production cost, but has the advantage that the space between the two uprights is not limited by the transverse in the embodiment of FIG. 1 shaft 9 and the stands themselves have no extensions.
  • the underfloor lift shown in Fig. 3 has two vertical beams 25a, 25b, at the upper ends of each a horizontal support arm 4a, 4b with telescopically adjustable support 5a, 5b is attached.
  • a - schematically indicated - support frame 27 is fixed, are fixed to the guides 28a, 28b for each vertical support 25a, 25b.
  • the support frame 27 is executed with the guides 28 a, 28 b and the other units as a preassembled unit, so that it can be easily installed and anchored in the pit 26.
  • the lower ends of the two vertical beams 25a, 25b are firmly connected to each other by a dimensionally stable cross member 29, which ensures a synchronization of the vertical support in their lifting and lowering movements.
  • this cross member 29 two as steel cables 30a, 30b executed tensile cords are struck with their lower ends, each extending parallel to an associated vertical support 25a, 25b.
  • the upper ends of the steel cables 30a, 30b are fixed to a respective drum 31a, 31b, both of which are mounted on a common shaft 32 are.
  • This shaft 32 runs in end-side stationary bearings 33 a, 33 b, which may be mounted on the support frame 27.
  • To drive the shaft 32 is an electric motor 34 which is optionally mounted on the support frame 27 together with an integrated transmission and connected to the shaft 32 via a chain drive 35.
  • the pit 26 is provided with an upper cover 36.
  • the underfloor lifting platform according to FIG. 3 can also be equipped with safety or operationally suitable units, such as an electronic controller with and without position sensors, strand brake, etc.
  • the illustrated embodiments may be provided with a manually operable auxiliary drive, which allows a slow lowering of the vehicle on the foundation floor in case of failure of the electric drive unit.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Types And Forms Of Lifts (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Handcart (AREA)
  • Control And Safety Of Cranes (AREA)
  • Vehicle Body Suspensions (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

A lifting platform for vehicles having at least one column, at least one support arm shiftable on the column by vertical guides and having supports. The lifting platform also includes a prime mover having switching and control elements and a transmission disposed between the prime mover and the associated support arm, the transmission having at least one flexible traction cable coupled to a rotating member positioned at the upper end of the respective column and to the associated support arm.

Description

Die Erfindung betrifft Fahrzeug-Hebebühnen der im Oberbegriff der Patentansprüche 1 bzw. 6 jeweils angegebenen Gattung.The invention relates to vehicle lifts of the type specified in the preamble of claims 1 and 6 respectively.

Derartige Hebebühnen werden in Werkstätten, Inspektionsbetrieben usw. zur Durchführung von Wartungs-, Reparatur- und Prüfarbeiten von Kraftfahrzeugen eingesetzt. Ein in die Hebebühne eingefahrenes Kraftfahrzeug wird in eine vom Monteur gewünschte Höhe angehoben, um Arbeiten am Unterbau des Fahrzeugs bequemer ausführen zu können. Herkömmliche Hebebühnen für Kraftfahrzeuge arbeiten in der Regel nach dem Hubstempelprinzip, dem Hubscherenprinzip oder dem Zahnstangen- bzw. Schraubspindelprinzip. Obwohl derartige Hebebühnen in ihren verschiedensten Ausführungen den betriebstechnischen Anforderungen der Praxis voll genügen, sind ihre Gestehungskosten erheblich, was im Wesentlichen durch die technisch anspruchsvollen Hubsysteme verursacht wird.Such lifts are used in workshops, inspection companies, etc. for performing maintenance, repair and inspection of motor vehicles. A retracted into the lift vehicle motor vehicle is raised to a height desired by the fitter to perform work on the base of the vehicle more comfortable. Conventional car lifts for motor vehicles usually work on the Hubstempelprinzip, the principle of the scissors or the rack or screw spindle principle. Although such lifts fully meet the operational requirements of practice in their various designs, their cost price is considerable, which is essentially caused by the technically demanding lifting systems.

Aus der US 4,022,428 ist eine Hebebühne für Kraftfahrzeuge bekannt, deren zwei Ständer über je einen Ständerfuß im Bodenfundament verankert sind. An der Innenseite jedes Ständers ist eine Vertikalführung kippfrei und vertikal verschiebbar angeordnet, an der ein horizontaler teleskopartig verstellbarer Tragarm mit einem endseitigen Auflager befestigt ist. Am oberen Ende eines Ständers befindet sich ein von einem Elektromotor und einem Getriebe gebildetes Antriebsaggregat, das eine Seiltrommel antreibt. Mehrere parallele Stahlseile sind mit ihren unteren Enden an der Vertikalführung dieses Ständers befestigt, sodass durch Drehen der Seiltrommel diese Vertikalführung angehoben und abgesenkt wird. Zum gleichgerichteten Anheben und Absenken auch der zweiten Vertikalführung mit ihrem Tragarm sind beide Vertikalführungen durch ein Seil miteinander verbunden, das von der ersten Vertikalführung über eine erste untere Umlenkrolle, einen zwischen beiden Ständern ausgebildeten Bodenkanal, eine zweite untere Umlenkrolle im Unterteil des zweiten Ständers und eine dritte Umlenkrolle im oberen Teil des zweiten Ständers zu der zweiten Vertikalführung läuft. Obgleich durch dieses Verbindungsseil eine Kraftübertragung vom Antriebsaggregat auf beide Vertikalführungen sichergestellt ist, können durch die relativ große Länge des Verbindungsseils und dessen Dehnung Positionsabweichungen der beiden Vertikalführungen mit ihren Tragarmen auftreten, die zu gefährlichen Schieflagen eines angehobenen Fahrzeugs führen würden. Zur Vermeidung dieser Probleme sind bei dieser bekannten Hebebühne technisch komplexe und damit kostenaufwendige Sicherungssysteme notwendig.From US 4,022,428 a lift for motor vehicles is known, the two stands are anchored via a respective stand base in the ground foundation. On the inside of each stand, a vertical guide is arranged tilt-free and vertically displaceable, to which a horizontal telescopically adjustable support arm is attached with an end-side support. At the upper end of a stand is a drive unit formed by an electric motor and a transmission which drives a cable drum. Several parallel steel cables are attached with their lower ends to the vertical guide of this stand, so that by rotating the cable drum, this vertical guide is raised and lowered. To the rectified raising and lowering and the second vertical guide with its support arm, both vertical guides are connected by a rope from the first vertical guide via a first lower pulley, formed between two uprights bottom channel, a second lower pulley in the lower part of the second stator and a third Guide roller in the upper part of the second stator to the second vertical guide runs. Although a power transmission from the drive unit is ensured on both vertical guides by this connecting cable, position deviations of the two vertical guides can occur with their support arms by the relatively large length of the connecting cable and its elongation, which would lead to dangerous imbalances of a raised vehicle. To avoid these problems technically complex and therefore costly security systems are necessary in this known lift.

Ferner sind sog. Unterflur-Hebebühnen für zweispurige Kraftfahrzeuge in einer Vielzahl von Ausführungen bekannt, die ebenfalls in Reparatur- und Inspektionsbetrieben zum Anheben eines eingefahrenen Kraftfahrzeugs eingesetzt werden. Diese Hebebühnen weisen regelmäßig eine Kassette auf, die in einer schmalen Grube im Bodenfundament festgelegt, z.B. einbetoniert ist. In dieser Kassette sind an deren Schmalseiten zwei Hubstempel installiert, die an ihren oberen aus der Grube vorstehenden Enden Fahrzeugauflager in Form von Auffahr-Flachträgern oder von teleskopartigen Tragarmen aufweisen. Jedem Hubstempel ist ein hydraulischer Hubzylinder zugeordnet, dessen Kolben bei Druckbeaufschlagung ausfährt und den zugehörigen Hubstempel in ortsfest installierten Führungen nach oben verschiebt. Zur Synchronisation der Hub- und Senkbewegun gen der beiden Hubstempel können deren untere Enden durch starre oder gelenkige Querholme miteinander verbunden sein. Aufgrund verschärfter Umweltschutzbestimmungen kann sich die Verwendung von Hydraulikzylindern bei derartigen Unterflur-Hebebühnen als problematisch erweisen, weil ein Einsickern von evt. ausgetretenem Lecköl in den Untergrund unbedingt vermieden werden muss, was durch eine langlebige und damit technisch aufwendige Abdichtung der Kassette erreicht wird. In verschiedenen Gebieten mit intensiveren Bodenerschütterungen, z.B. durch Erdbeben, werden hydraulische Unterflur-Hebebühnen nicht oder nur mit extrem hohen Sicherheitsauflagen zugelassen. Dieser Problematik trägt eine aus der DE-36 14 372 A bekannte Unterflur-Hebebühne Rechnung, deren beide in Führungsrohren geführte Hubstempel durch eine untere Verbindungsstrebe starr miteinander verbunden sind. In der Mitte der Verbindungsstrebe ist eine Mutter angebracht, die mit einer Gewindespindel zusammenwirkt. Zum Anheben und Absenken der Stempel wird die Gewindespindel von einem Elektromotor über einen Endlosriemen angetrieben.Furthermore, so-called. Underground lifts for two-lane motor vehicles are known in a variety of designs, which are also used in repair and inspection operations for lifting a retracted motor vehicle. These lifts regularly have a cassette that is set in a narrow pit in the ground foundation, eg embedded in concrete. In this cassette, two lifting pistons are installed on their narrow sides, which have vehicle supports in the form of ramp-on flat carriers or of telescopic support arms at their upper ends projecting from the pit. Each lifting ram is assigned a hydraulic lifting cylinder, the piston extends when pressurized and moves the associated lifting ram in stationary installed guides upwards. To synchronize the lifting and Senkbewegun conditions of the two lifting rams whose lower ends can be connected to each other by rigid or articulated cross beams. Due to stricter environmental regulations, the use of hydraulic cylinders in such underfloor lifts may prove problematic because infiltration of evt leaked leakage oil must be avoided in the underground, which is achieved by a durable and thus technically complex sealing of the cassette. In different areas with more intense ground vibrations, eg earthquakes, hydraulic underfloor lifts are not approved or only with extremely high safety requirements. This problem carries a known from DE-36 14 372 A underfloor lift invoice, both of which are guided in guide tubes lifting ram rigidly connected to each other by a lower connecting strut. In the middle of the connecting strut, a nut is mounted, which cooperates with a threaded spindle. To raise and lower the stamp, the threaded spindle is driven by an electric motor via an endless belt.

Ferner sind eine Vielzahl von unterschiedlichen Hebesystemen auch in Unterflur-Bauweise bekannt, die flexible Zugorgane, wie Gliederketten, Seile, Gurte od. dgl., als Zugorgane zum Anheben von z.B. Plattformen, Sperrschiebern usw. verwenden (DE 2 317 695 A, FR 1 145 939).Further, a variety of different lifting systems are also known in underfloor construction, the od od flexible links, such as link chains, ropes, straps. Like., As tension members for lifting of e.g. Use platforms, pushers, etc. (DE 2 317 695 A, FR 1 145 939).

Aufgabe der Erfindung ist es, eine technisch einfache Hebebühne für Fahrzeuge zu schaffen, die bei geringem Platzbedarf kostengünstig hergestellt und wartungsarm betrieben werden kann, daneben aber auch die bestehenden Sicherheitsanforderungen voll erfüllt.The object of the invention is to provide a technically simple lift for vehicles that can be inexpensively manufactured with low space requirements and operated with low maintenance, but also fully meets the existing safety requirements.

Diese Aufgabe wird bei einer sog. Ständer-Hebebühne durch die im Anspruch 1 angegebenen Merkmale und bei einer sog. Unterflur-Hebebühne durch die im Anspruch 6 angegebenen Merkmale gelöst.This object is achieved in a so-called. Stands lift by the features specified in claim 1 and in a so-called. Underground lift by the features specified in claim 6.

Die erfindungsgemäße Zwei-Ständer-Hebebühne zeichnet sich dadurch aus, dass jeweils ein gesonderter Zugstrang pro Ständer vorgesehen ist, wobei bei Verwendung nur eines einzigen Antriebsaggregats dessen Drehmoment auf die Treibglieder der beiden gleichartigen Zugstränge gleichmäßig verteilt wird, um auf die jeweiligen Tragarme gleich große Hubkräfte auszuüben und deren Gleichlauf sicherzustellen. Diese Drehmomentverzweigung wird auf einfache Weise durch die Welle erreicht, die sich zwischen den Ständern erstreckt und über ein mit dem Antriebsaggregat über einen Getriebezug gekoppeltes Antriebsglied, z.B. einem Kettenrad angetrieben wird. Um einen ausreichenden Freiraum für die Fahrzeuge zu gewährleisten, kann die Welle entweder an oberen Verlängerungen der beiden Ständer oder aber am unteren Ständerende ggf. in oder unter dem Bodenniveau angeordnet sein. Entsprechendes gilt für das Antriebsaggregat, das zusammen mit seinen Getriebeelementen entweder am oberen Ende eines Ständers oder aber an dessen unteren Teil angeordnet sein kann.The two-stand lift according to the invention is characterized in that each provided a separate pull cord per stand is, with the use of only a single drive unit whose torque is evenly distributed to the drive links of the two similar tension cords to exert on the respective support arms equal lifting forces and ensure their synchronization. This torque split is achieved in a simple manner by the shaft which extends between the uprights and is driven via a drive member coupled to the drive unit via a gear train, for example a sprocket. In order to ensure sufficient space for the vehicles, the shaft can be arranged either at upper extensions of the two stands or at the lower end of the stand, if necessary, at or below the floor level. The same applies to the drive unit, which can be arranged together with its transmission elements either at the upper end of a stand or at its lower part.

Eine zweckmäßige Weiterbildung der Erfindung zeichnet sich dadurch aus, dass das Antriebsaggregat selbst oder aber ein Hilfsantrieb auch manuell betätigt werden kann, um ein angehobenes Fahrzeug bei einer Betriebsstörung des motorischen Hubsystems von Hand absenken zu können.An expedient development of the invention is characterized in that the drive unit itself or an auxiliary drive can also be manually operated in order to be able to manually lower a raised vehicle in the event of a malfunction of the motorized lifting system.

Gemäß einer anderen Weiterbildung der Erfindung sind Bremseinrichtungen für jeden Tragarm vorgesehen, die beim Auftreten eines kritischen Betriebszustands, z.B. bei einem Bruch des Zugstranges oder bei einer überhöhten Absinkgeschwindigkeit, automatisch aktiviert werden und die Tragarme stillsetzen.According to another embodiment of the invention, braking devices are provided for each support arm, which are automatically activated upon occurrence of a critical operating condition, for example, at a fraction of the tension cord or at an excessive descent speed and shut down the support arms.

Schließlich kann noch eine zusätzliche Gleichlaufkontrolle vorgesehen sein, die z.B. einen Nothalt auslöst, wenn die beiden Tragarme mit unterschiedlichen Geschwindigkeiten verfahren werden und/oder sich in unterschiedlichen Höhenlagen befinden.Finally, an additional synchronization control may be provided, e.g. triggers an emergency stop when the two support arms are moved at different speeds and / or are at different altitudes.

Als Zugstrang können handelsübliche Stahlseile, Gurte, Gliederketten od. dgl. verwendet werden, die in verschiedensten Ausführungen und Stärken kostengünstig erhältlich sind. Gleiches gilt für die weiteren Bauteile des Hubsystems.Commercially available steel cables, straps, link chains or the like can be used as a tensile strand and are available inexpensively in a wide variety of designs and strengths. The same applies to the other components of the lifting system.

Schließlich kann bei dem erfindungsgemäßen Hebesystem auch das sogenannte Flaschenzugprinzip angewandt werden, wobei der Zugstrang über ein am Tragarm gelagertes Umlenkglied geführt ist, über eine am oberen Ende des Ständers gelagerte Rolle bzw. ein Kettenrad läuft und auf eine am unteren Ständerende angeordnete angetriebene Trommel oder dergleichen aufgewickelt wird. Daneben ist auch die Verwendung einer Endloskette als Zugorgan möglich.Finally, in the lifting system according to the invention, the so-called pulley principle can be applied, wherein the tension cord is guided over a deflection arm mounted on the support arm, via a roller mounted on the upper end of the stand or a sprocket runs and arranged on a lower end of the stator driven drum or the like is wound up. In addition, the use of an endless chain as a tension member is possible.

Weitere Besonderheiten und Vorzüge der erfindungsgemäßen Hebebühne ergeben sich aus der folgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. Es zeigen:

Fig. 1
eine Zwei-Ständer-Hebebühne in schematischer Frontansicht;
Fig. 2
eine andere Ausführung der Hebebühne, ebenfalls in schematischer Frontansicht;
Fig. 3
eine Unterflur-Hebebühne in schematischer Frontansicht.
Other features and advantages of the lift according to the invention will become apparent from the following description of exemplary embodiments with reference to the drawing. Show it:
Fig. 1
a two-stand lift in a schematic front view;
Fig. 2
another embodiment of the lift, also in a schematic front view;
Fig. 3
an underfloor lift in a schematic front view.

Die Zwei-Ständer-Hebebühne nach Fig. 1 ist für zweispurige Fahrzeuge, insbesondere Pkws, konzipiert und verfügt über zwei Ständer 1a, 1b, die über einen zugehörigen Fuß 2a, 2b fest im Bodenfundament 3 verankert sind. An jedem Ständer 1a, 1b ist ein horizontaler Tragarm 4a, 4b vertikal verfahrbar angeordnet. Jeder Tragarm 4a, 4b ist teleskopartig verlängerbar und weist an seinem Ende ein Auflager 5a, 5b auf. Endseitig ist jeder Tragarm 4a, 4b an einer Vertikalführung 6a, 6b befestigt, die bei der dargestellten Ausführung den jeweiligen Ständer 1a, 1b zumindest teilweise umschließt, wobei die Länge dieser Führungen 6a, 6b eine kippfreie Halterung der Tragarme 4a, 4b auch bei aufstehendem Fahrzeug sowie deren leichtgängige Verschiebungen gewährleistet.The two-stand lift according to FIG. 1 is designed for two-lane vehicles, in particular cars, and has two stands 1a, 1b, which are firmly anchored in the ground foundation 3 via an associated foot 2a, 2b. At each stand 1a, 1b, a horizontal support arm 4a, 4b is arranged vertically movable. Each support arm 4a, 4b is telescopically extendable and has at its end a support 5a, 5b. At the end, each support arm 4a, 4b is fixed to a vertical guide 6a, 6b, which in the illustrated embodiment at least partially encloses the respective uprights 1a, 1b, the length of these guides 6a, 6b being a tilt-free mounting of the support arms 4a, 4b even when the vehicle is upright and their smooth shifts guaranteed.

An jedem Ständer 1a, 1b befindet sich ein stabiler Verlängerungsholm 7a, 7b mit jeweils einem oberen Lager 8a, 8b für eine Querwelle 9, die an ihrem in Fig. 1 rechten Ende ein Kettenrad 10 trägt. Im oberen Endbereich des in Fig. 1 rechten Verlängerungsholms 7b ist ein Antriebsaggregat in Form eines Elektromotors 11 installiert, der über ein Kettenrad 12 und eine über beide Kettenräder 10 und 12 laufende Endloskette 13 die Querwelle 9 in Drehbewegung versetzt. Über zwei auf der Querwelle 9 fest montierte Scheiben 14a, 14b läuft jeweils ein Zugstrang 15a, 15b, der ein Stahlseil, ein Gurt oder auch eine Gliederkette sein kann. Bei dem dargestellten Ausführungsbeispiel ist jeder Zugstrang 15a, 15b ein Stahlseil, das mit seinem einen Ende über einen Anschluß 16a, 16b an der zugehörigen Vertikalführung 6a, 6b befestigt ist und dessen jeweils anderer Endteil an der zugehörigen Scheibe bzw. Trommel 14a, 14b festgelegt ist.At each stand 1a, 1b is a stable extension spar 7a, 7b, each with an upper bearing 8a, 8b for a transverse shaft 9, which carries a sprocket 10 at its right in Fig. 1 end. In the upper end region of the right in Fig. 1 extension member 7 b, a drive unit in the form of an electric motor 11 is installed, via a sprocket 12 and an over both sprockets 10 and 12 running endless chain 13 the transverse shaft 9 is set in rotary motion. About two on the transverse shaft 9 fixedly mounted discs 14a, 14b runs in each case a tensile strand 15a, 15b, which may be a steel cable, a belt or a link chain. In the illustrated embodiment, each tensile strand 15a, 15b is a steel cable which is attached at its one end via a terminal 16a, 16b to the associated vertical guide 6a, 6b and whose respective other end part is fixed to the associated disc or drum 14a, 14b ,

Durch Einschalten des E-Motors 11 wird über den Kettentrieb 10 bis 13 die Querwelle 9 zusammen mit den beiden Scheiben bzw. Trommeln 14a, 14b in Drehbewegung versetzt, so daß beide Zugstränge 15a, 15b mit gleicher Geschwindigkeit aufgewickelt und dadurch die beiden Tragarme 4a, 4b synchron angehoben werden. Die Absenkbewegung der Tragarme 4a, 4b erfolgt zweckmäßig durch ihr Eigengewicht bzw. das zusätzliche Gewicht eines aufliegenden Fahrzeugs mit durch eine Bremse oder den E-Motor 11 vorgegebener Geschwindigkeit.By turning on the electric motor 11, the transverse shaft 9 is rotated via the chain drive 10 to 13 together with the two discs or drums 14a, 14b, so that both tension cords 15a, 15b wound at the same speed and thereby the two support arms 4a, 4b are raised synchronously. The lowering movement of the support arms 4a, 4b is expediently carried out by its own weight or the additional weight of an overlying vehicle with a predetermined speed by a brake or the electric motor 11.

In Fig. 2 ist lediglich der rechte Teil einer Hebebühne schematisch dargestellt, deren zweiter Ständer mit den Zusatzaggregaten entsprechend der Ausführung nach Fig. 1 gleich ausgebildet ist. Der E-Motor 11 ist hier zusammen mit dem Kettentrieb 10, 12, 13 in einem kastenförmigen Gehäuse am unteren Ende des als Hohlprofil ausgeführten Ständers 1b angeordnet. Entsprechend verläuft die Querwelle 9 in einer im Bodenfundament 3 ausgebildeten Rinne 21, die durch eine Platte 22 abgedeckt ist. Auf den beiden Endteilen der Querwelle sitzen drehfest Trommeln, von denen hier nur die rechtsseitige Trommel 14b dargestellt ist. Wie beim Ausführungsbeispiel nach Fig. 1 werden auf diese hier zumindest teilweise innerhalb des Ständer-Hohlprofils angeordneten Trommeln 14 beim Anheben und Absenken der Tragarme 4b die entsprechenden Teilstücke des jeweils zugehörigen Zugstranges 15b aufgewickelt. Bei dem Ausführungsbeispiel nach Fig. 2 wird als Zugstrang ebenfalls ein innerhalb des Hohlprofils verlaufendes Stahlseil 15b verwendet, das mit einem Ende bei 16b am unteren Teil der Vertikalführung 6b fixiert ist und über eine im oberen Endbereich des Ständers 1b drehbar gelagerte Umlenkscheibe 23 läuft, wobei der gestrichelt dargestellte Strangteil dann auf die bodenseitig angeordnete Trommel 14b aufgewickelt wird.In Fig. 2, only the right part of a lift is shown schematically, the second stator with the additional units according to the embodiment of FIG. 1 is the same. The electric motor 11 is arranged here together with the chain drive 10, 12, 13 in a box-shaped housing at the lower end of the designed as a hollow profile stand 1b. Accordingly, the transverse shaft 9 extends in a groove formed in the base foundation 3 groove 21, which is covered by a plate 22. On the two end portions of the transverse shaft sitting non-rotatably drums, of which only the right-side drum 14b is shown here. As in the embodiment according to FIG. 1, the corresponding sections of the respectively associated pull cord 15b are wound onto these drums 14 arranged here at least partially within the stator hollow profile when the support arms 4b are raised and lowered. In the embodiment according to FIG. 2, a steel cable 15b extending within the hollow profile is likewise used as a tensile strand, which is fixed at one end at 16b to the lower part of the vertical guide 6b and runs over a deflecting disc 23 rotatably mounted in the upper end region of the stator 1b, wherein the stranded part shown in dashed lines is then wound on the bottom side arranged drum 14b.

Insbesondere bei der Ausführung nach Fig. 2 läßt sich das sogenannte Flaschenzugprinzip auf einfache Weise anwenden, indem das eine Ende des Zugseils 15b im oberen Teil des Ständers 1b fixiert wird und in der Längsführung 6b eine weitere Umlenkrolle angeordnet wird, über welche das Stahlseil dann zur oberen Umlenkscheibe 23 läuft.In particular, in the embodiment of Fig. 2, the so-called pulley principle can be applied in a simple manner by the one end of the traction cable 15 b is fixed in the upper part of the stator 1 b and in the longitudinal guide 6 b, a further deflection roller is arranged, via which the steel cable then runs to the upper deflection plate 23.

Die Ausführung nach Fig. 2 erfordert zwar durch die im Bodenfundament auszuarbeitende Rinne 21 und deren Abdeckung einen vermehrten Herstellungsaufwand, bietet aber den Vorteil, daß der Freiraum zwischen den beiden Ständern nicht durch die bei der Ausführung nach Fig. 1 querlaufende Welle 9 begrenzt wird und die Ständer selbst auch keine Verlängerungen aufweisen.Although the embodiment of FIG. 2 requires by the elaborate in the ground foundation groove 21 and their cover an increased production cost, but has the advantage that the space between the two uprights is not limited by the transverse in the embodiment of FIG. 1 shaft 9 and the stands themselves have no extensions.

Die in Fig. 3 dargestellte Unterflur-Hebebühne weist zwei Vertikalträger 25a, 25b auf, an deren oberen Enden je ein horizontaler Tragarm 4a, 4b mit teleskopartig verstellbarem Auflager 5a, 5b befestigt ist. Im oberen Teil einer Grube 26 im Bodenfundament 3 ist ein - schematisch angedeutetes - Traggerüst 27 befestigt, an dem Führungen 28a, 28b für jeden Vertikalträger 25a, 25b fixiert sind. Zweckmäßig ist das Traggerüst 27 mit den Führungen 28a, 28b und den weiteren Aggregaten als vormontierte Baueinheit ausgeführt, so daß sie auf einfache Weise in die Grube 26 eingebaut und verankert werden kann. Die unteren Enden der beiden Vertikalträger 25a, 25b sind durch einen formsteifen Querholm 29 fest miteinander verbunden, der einen Gleichlauf der Vertikalträger bei ihren Hub- und Senkbewegungen gewährleistet. An diesem Querholm 29 sind zwei als Stahlseile 30a, 30b ausgeführte Zugstränge mit ihren unteren Enden angeschlagen, die jeweils parallel zu einem zugehörigen Vertikalträger 25a, 25b verlaufen. Die oberen Enden der Stahlseile 30a, 30b sind an je einer Trommel 31a, 31b festgelegt, die beide auf einer gemeinsamen Welle 32 befestigt sind. Diese Welle 32 läuft in endseitigen ortsfesten Lagern 33a, 33b, die am Traggerüst 27 montiert sein können. Zum Antrieb der Welle 32 dient ein E-Motor 34, der am Traggerüst 27 gegebenenfalls zusammen mit einem integrierten Getriebe montiert und mit der Welle 32 über einen Kettentrieb 35 verbunden ist. Die Grube 26 ist mit einer oberen Abdeckung 36 versehen.The underfloor lift shown in Fig. 3 has two vertical beams 25a, 25b, at the upper ends of each a horizontal support arm 4a, 4b with telescopically adjustable support 5a, 5b is attached. In the upper part of a pit 26 in the base foundation 3 a - schematically indicated - support frame 27 is fixed, are fixed to the guides 28a, 28b for each vertical support 25a, 25b. Suitably, the support frame 27 is executed with the guides 28 a, 28 b and the other units as a preassembled unit, so that it can be easily installed and anchored in the pit 26. The lower ends of the two vertical beams 25a, 25b are firmly connected to each other by a dimensionally stable cross member 29, which ensures a synchronization of the vertical support in their lifting and lowering movements. At this cross member 29 two as steel cables 30a, 30b executed tensile cords are struck with their lower ends, each extending parallel to an associated vertical support 25a, 25b. The upper ends of the steel cables 30a, 30b are fixed to a respective drum 31a, 31b, both of which are mounted on a common shaft 32 are. This shaft 32 runs in end-side stationary bearings 33 a, 33 b, which may be mounted on the support frame 27. To drive the shaft 32 is an electric motor 34 which is optionally mounted on the support frame 27 together with an integrated transmission and connected to the shaft 32 via a chain drive 35. The pit 26 is provided with an upper cover 36.

Entsprechend den Ausführungen nach Fig. 1 und 2 kann auch die Unterflur-Hebebühne nach Fig. 3 mit sicherheits- bzw. betriebstechnisch zweckmäßigen Aggregaten, wie einer elektronischen Steuerung mit und ohne Positionssensoren, Strang-Bremse, etc., ausgerüstet sein.
Weiterhin können die dargestellten Ausführungen mit einem manuell betätigbaren Hilfsantrieb versehen sein, der bei einer Störung des elektrischen Antriebsaggregats ein langsames Absenken des Fahrzeugs auf den Fundamentboden ermöglicht.
According to the embodiments according to FIGS. 1 and 2, the underfloor lifting platform according to FIG. 3 can also be equipped with safety or operationally suitable units, such as an electronic controller with and without position sensors, strand brake, etc.
Furthermore, the illustrated embodiments may be provided with a manually operable auxiliary drive, which allows a slow lowering of the vehicle on the foundation floor in case of failure of the electric drive unit.

Claims (10)

  1. Lifting platform for two track vehicles comprising
    - at least two columns (1a, 1b) fixedly anchored in the floor bed (3) via an associated base (2a, 2b), respectively,
    - a vertical guide (6a, 6b) provided on each column (1a, 1b), respectively, so as to be shiftable but not pivotable,
    - at least one horizontal support arm (4a, 4b) per column (1a, 1b) which is attached to the associated vertical guide (6a, 6b) and carries a support (5a, 5b) on its free end,
    - a prime mover (10 to 13) provided on one column (1a) and comprising an electric motor (11), a transmission (12, 13) and a rotatably supported barrel (14), and
    - a flexible traction cable (15) the one end of which is attached to the barrel (14) and the other end of which is attached to the associated vertical guide (6),
    characterised in that
    - the upper or lower ends of both columns (1a, 1b) are fixedly connected to each other by means of a shaft (9) drivable by the electric motor (11) via the transmission (12, 13),
    - two barrels (14a, 14b) are fixed to the shaft (9),
    - a respective traction cable (15a, 15b) for synchronously lifting and lowering the two vertical guides (6a, 6b) is provided between each barrel (14a, 14b) and the associated vertical guide (6a, 6b), and
    - a monitoring means is provided which deactivates the prime mover (10 to 13) and activates a braking means in case of abnormal operation conditions.
  2. Lifting platform according to claim 1,
    characterised in that the flexible traction cables (15a, 15b) are cables, belts or link chains.
  3. Lifting platform according to claim 1 or 2,
    characterised in that
    the prime mover (11) is provided on the upper end of a column (1b) and the shaft (9) connects the two upper ends of the two columns (1a, 1b).
  4. Lifting platform according to claim 1 or 2,
    characterised in that
    the prime mover (11) is disposed at the lower end of a column (1b) and the shaft (9) is provided on or in the floor bed (3), the traction cable being passed over a deflection (23) provided at the upper end of the respective column.
  5. Lifting platform according to one of the preceding claims,
    characterised by
    braking means for each of the two columns (4a, 4b) which are automatically activated when a predetermined sinking speed of at least one support arm is exceeded.
  6. Underfloor lifting platform for two track vehicles comprising
    - two vertical beams (25a, 25b) liftable from and lowerable into a pit (26), guided in stationary guides (28a, 28b) in the upper section of the pit (26) and having lower ends which are fixedly connected to each other by means of a rigid transverse bar (29),
    - at least one support arm (4a, 4b) fixed to the upper end of each vertical beam (25a, 25b) and carrying an adjustable support (5a, 5b) on its free end,
    - a prime mover provided in the upper portion of the pit (26) and comprising an electric motor (34) and a transmission (35),
    characterised by
    - a shaft (32) supported in two stationary bearings (33a, 33b) between the two guides (28a, 28b) in the upper portion of the pit (26) and coupled to the transmission (35), two barrels (31a, 31b) being attached to said shaft (32),
    - two flexible cables (30a, 30b) each of which is attached to the transverse bar (29) at its lower end and can be wound onto and unwound from a respective barrel (31a, 31b) to lift and lower the transverse bar (29) including the two vertical beams (25a, 25b), and
    - a monitoring means deactivating the prime mover (34, 35) and activating a braking means in case of abnormal operating conditions.
  7. Lifting platform according to one of the preceding claims,
    characterised by
    a manually operable lowering drive to lower the support arms (4a, 4b) when the prime mover is deactivated.
  8. Lifting platform according to one of the preceding claims,
    characterised in that
    the braking means comprises at least one brake block cooperating with the respective vertical guide of the column or vertical beam.
  9. Lifting platform according to one of the preceding claims,
    characterised in that
    a safety means comprises positive locking elements such as a locking bolt.
  10. Lifting platform according to one of the preceding claims,
    characterised in that
    the monitoring means comprises position detectors, e.g. induction staffs, provided on the columns.
EP01117665A 2000-08-31 2001-07-25 Lifting platform for vehicles Expired - Lifetime EP1184332B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20015061U DE20015061U1 (en) 2000-08-31 2000-08-31 Vehicle lifting platform
DE20015061U 2000-08-31

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EP1184332A1 EP1184332A1 (en) 2002-03-06
EP1184332B1 true EP1184332B1 (en) 2006-06-14

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US (2) US6863159B2 (en)
EP (1) EP1184332B1 (en)
AT (1) ATE329877T1 (en)
AU (1) AU2001281031A1 (en)
CA (1) CA2419856C (en)
DE (2) DE20015061U1 (en)
ES (1) ES2266056T3 (en)
WO (1) WO2002018261A1 (en)

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US7028811B2 (en) 2006-04-18
US6863159B2 (en) 2005-03-08
CA2419856C (en) 2006-07-11
US20040112682A1 (en) 2004-06-17
DE50110121D1 (en) 2006-07-27
US20020023801A1 (en) 2002-02-28
WO2002018261A1 (en) 2002-03-07
ES2266056T3 (en) 2007-03-01
AU2001281031A1 (en) 2002-03-13
CA2419856A1 (en) 2002-03-07
DE20015061U1 (en) 2001-02-22
EP1184332A1 (en) 2002-03-06
ATE329877T1 (en) 2006-07-15

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