EP2113482B1 - Lifting system - Google Patents

Lifting system Download PDF

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Publication number
EP2113482B1
EP2113482B1 EP20090158517 EP09158517A EP2113482B1 EP 2113482 B1 EP2113482 B1 EP 2113482B1 EP 20090158517 EP20090158517 EP 20090158517 EP 09158517 A EP09158517 A EP 09158517A EP 2113482 B1 EP2113482 B1 EP 2113482B1
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EP
European Patent Office
Prior art keywords
lifting
unit
additional
main
units
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.)
Not-in-force
Application number
EP20090158517
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German (de)
French (fr)
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EP2113482A1 (en
Inventor
Anton Knestel
Engelbert Keseberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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 date
Application filed by Maha Maschinenbau Haldenwang GmbH and Co KG, Maha GmbH and Co KG filed Critical Maha Maschinenbau Haldenwang GmbH and Co KG
Priority to PL09158517T priority Critical patent/PL2113482T3/en
Publication of EP2113482A1 publication Critical patent/EP2113482A1/en
Application granted granted Critical
Publication of EP2113482B1 publication Critical patent/EP2113482B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
    • 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
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • B66F7/0666—Multiple scissor linkages vertically arranged
    • B66F7/0675—Auxiliary scissors, e.g. above main scissors
    • 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
    • B66F7/26—Lifting frames, e.g. for lifting vehicles; Platform lifts for selective lifting of parts of vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive

Definitions

  • the invention relates to a lifting device for lifting objects, in particular of vehicles, with a Schohubech and a 1925hubech, wherein to reduce the necessary measuring and control means for the entire lifting device, which may consist of a Haupthubech and a 1925hubech, only a single hydraulic unit with corresponding controls can be used.
  • US 5 024 141 A discloses a lifting device with a sensor arrangement in which the synchronous course of the cylinder with pulse generator and sensors is ensured, and the hydraulic cylinders are individually controlled.
  • WO 95/11189 A1 discloses a lifting device, wherein two bypass valves are provided, which are controllable by a control unit.
  • the sensors measure an extension length of the cylinders.
  • US Pat. No. 6,189,432 B1 discloses a lifting device with sensors that measure a lifting height. Synchronization is ensured by a control unit that controls a bypass valve.
  • the main lifting gear and the additional lifting gear are driven in cascade, resulting in a total lifting height which is greater than the lifting heights of the individual lifting units.
  • the main lift is raised and then extended the additional hoist.
  • Commercially available lifting platforms have two rails, which are accessible by a vehicle. In each case, a scissor lift is used for each rail, for example, to ensure sufficient accessibility to the vehicle floor. Between the two Scissor lifts are no mechanical fasteners provided. Since these scissor lifts are independently raised, therefore, there is a technical need to bring the lifting height of the two rails, (left and right rail) permanently to the same level and to hold.
  • the object of the invention is to provide a lifting device for lifting objects, in particular vehicles, which manages with as few measuring means and control means.
  • the lifting device for lifting objects, in particular of vehicles, has at least two main lifting units and at least two additional lifting units on.
  • the additional lifting unit is arranged on the main lifting unit such that with the additional lifting unit, a main lifting height of the lifting platform can be extended to a total lifting height.
  • a control unit is provided which is characterized in that both the main lifting unit and the additional lifting unit can be controlled by the control unit.
  • at least one main actuator per Haupthubü and at least one additional actuator per soirhubü provided, wherein the main actuator and the auxiliary actuator are switched dependent on each other, that alternatively only each of the main actuator or the additional actuator in an active or activated state can be transferred.
  • a measuring unit is provided, with which the total lifting height, which results from the sum of the main lifting height of the main lifting unit and the lifting height of the additional lifting unit, is collectively detectable.
  • the number of components used can be further reduced.
  • the control unit is a hydraulic control unit having a flow divider and two bypass valves, wherein with the control unit alternatively a synchronization control of the Haupthubajien or visahubüen is feasible.
  • control unit may be a control and / or regulating unit and the main actuators and additional actuators may be designed as seat valves.
  • the lifting units can be hydraulically operated. It may be in the lifting units or in the lifting device to underground stages with punches, to pillar lifts, possibly also with telescopic actuation, and / or swing lifts.
  • the main actuator can be in an open or active state in which the Haupthubech is controlled and in a closed or inactive state in which the Haupthubech is not controllable, convertible, and / or the additional actuator in an open or active state in which the additional lifting unit is activatable and in a closed or inactive state in which the Rajhubech is not controllable, be transferable, wherein when the main actuator is in an open or active state, the additional actuator only in a closed or inactive state is convertible, and / or when the additional actuator is in an open or active state, the main actuator is only in a closed or inactive state can be transferred.
  • This can ensure that the individual lifting units can not be operated simultaneously and thus the risk of error detection of a synchronization by the control unit, although the lifting units perform uneven lifting movements is excluded.
  • a bypass valve of the respective higher main lift unit and / or additional lift unit can be temporarily transferred into an open state. This results in the advantage that minor differences in stroke between the respective lifting units of a running rail with respect to. The other rail can be compensated without interrupting the lifting movement of the lift.
  • a stroke difference between the lifting units can be compensated in a particularly simple manner, wherein this compensation is faster than when only the bypass valve of each higher lifting unit is opened for a limited time.
  • a second shut-off valve can be converted into a closed state. This results in the advantage that when a difference in stroke occurs both with the main lifting unit and with the additional lifting unit, this stroke difference can be compensated.
  • the lifting device when the stroke difference exceeds a maximum value, the lifting device can be immobilized by all Shut-off valves can be converted into a closed state and a pump unit can be put out of service.
  • This has the advantage that when an impermissible difference in lift between the lifts occurs, the entire system can be switched off, it being possible to ensure that a fall of an object on the lifting unit, for example a vehicle, can be prevented.
  • the lifting device may be characterized in that at least one measuring unit is provided per lifting element, wherein the lifting element may comprise a Schohubech associated with at least one vinhubech in connection with the measuring unit a total lift height, which is the sum of the lifting height of the Feldhubü and the lifting height of the additional lifting unit results, can be collectively detected.
  • the lifting device may be characterized in that the measuring unit is formed by a non-contact measuring device and that the lifting height between a bottom surface and the additional lifting unit is detected, whereby the total lifting height of the lift can be detected directly.
  • the lifting device may be characterized in that the measuring unit is formed by a cable pull sensor, wherein the Seilzugsensor is fixed to the ground and a pull-out rope is connected to the Rajhubü.
  • the lifting device may be characterized in that the measuring unit is formed by a cable pull sensor, wherein the cable pull sensor is attached to the Rajhubaji and the pull-rope is connected to the ground.
  • a first shut-off valve can be closed.
  • a second shut-off valve can be closed.
  • lifting device can be shut down when the stroke difference exceeds a maximum value by all shut-off valves are closed and a pump set is put out of service.
  • a lifting device is shown, each with a Schohubech 22, 23 which is designed as a scissor lift.
  • the main lifting units 22, 23 have a base 110, which communicate with a bottom surface 130, for example a workshop hall.
  • the main lifting units 22, 23 furthermore each have a running rail 202 and a lifting element 14, 15, with the lifting elements 14, 15, which are in the form of hydraulic cylinders, moving the respective running rail 202 substantially perpendicular to the bottom surface 130 via the scissor mechanism can be.
  • two rails 202 are provided and correspondingly for each rail a Schothubelement 14, 15.
  • an additional lifting unit 24, 25 may be provided, also in the form of a scissor lift.
  • the additional lifting units 24, 25 may each have a carrier 201, which is arranged substantially parallel to the running rail 202.
  • the carrier 201 may perform a lifting movement, substantially perpendicular to the bottom surface 130.
  • the lifting movement of the carrier 201 is accomplished by a respective lifting element 16, 17 in the form of a hydraulic cylinder.
  • the carrier 201 may be connected to an underbody of a vehicle (not shown) be brought into contact, for example, to raise the vehicle to a total lift height hg.
  • the lifting elements 14, 15, 16, 17 may be designed as a hydraulic cylinder, stamp, columns and / or spindle.
  • schematic measuring units which comprise at least one transmitting unit 28 and / or at least one receiving unit 30.
  • one transmitting and receiving unit 28, 30 is provided for each side of the lifting device.
  • the transmission unit 28 can be mounted on the workshop floor 130, which transmits signals without contact, for example in the form of a laser beam and / or infrared signal to a receiving unit 30, which is in each case attached to an underside of the carrier 201 of the additional lifting unit 24, 25.
  • the measuring units 28, 30 for detecting the lifting height can also be designed as an ultrasonic sensor or as a cable pull.
  • the arrangements of the transmitting unit 28 and receiving unit 30 can also be reversed, that is to say that the receiving unit 30 can be arranged on the bottom surface 130 or on a non-moving part, and the transmitting unit 28 on the carrier 201 or a moving part can be arranged.
  • a control unit 200 (see Fig. 2 ) communicates with the lifting elements 14, 15 of the Feldhubajien 22, 23 and the lifting elements 16, 17 of the Rajhubüen 24, 25 and can control the lifting elements 16, 17 such that the rails 202 of the Feldhubechen 22, 23 a Haupthub Too h h and the carriers 201 of the additional lifting units 24, 25 approach a total lifting height hg. Furthermore, the control unit 200 communicates with the transmission unit or units 28, the transmission unit 28 transmitting to the control unit 200 signal data relating to the actual actual height of the main lift units 22, 23 and the additional lift units 24, 25.
  • the control unit 200 thus permanently detects the actual main lift height h h and the actual total lift height hg is and permanently performs a comparison with the desired main lift height h h -soll and the target total lift height hg-soll.
  • the control unit 200 controls the current height of the Haupthubajien 22, 23 and the Rajhubüen 24, 25 and controls the lifting units 22, 23, 24 and 25 such that the desired position of the respective lifting unit 22, 23, 24 and 25 is reached.
  • the rails 202 are shown.
  • the rails 202 are in this case with the Haupthubüen 22, 23 in conjunction.
  • the support members 201 are shown, which are in communication with the Rajhubüen 24, 25. After a vehicle is driven onto the rails 202, this can be lifted with the support members 201, and thus raised to the total lift height. In such a position, the wheels of the vehicle are free in the air.
  • FIG. 2 A hydraulic circuit diagram of the lifting device is shown. In this case, only a hydraulic unit is used with appropriate controls for the entire lifting device.
  • the oil flow generated by a hydraulic pump 1 is distributed approximately uniformly over the flow divider 2 to the lifting units 22, 23, 24 and / or 25.
  • a check valve 3 ensures that when the drive motor 4, the hydraulic oil can not flow backwards through the pump 1 and the filter 5 in the tank 6. Further, a pressure relief valve (DBV) 7 is provided to protect the lifting units and the entire hydraulic system from overload. If a different lifting height is determined by the measuring units, then one of the two bypass valves 8, 9 is opened via a control unit 200 and a part of the oil volume flow is returned to the tank 6. In this case, the compensation speed can be adjusted via throttle valves 10, 11. To lower the lift, the pump unit 41 is turned off and the lowering valve 12 is opened. The lowering speed is regulated via a further throttle valve 13. If a different lifting height is detected during the lowering process, the bypass valves 8, 9 are opened and an additional quantity of oil is discharged on the side of the lifting unit with a greater height.
  • DBV pressure relief valve
  • the hydraulic unit, (control and / or regulating unit) 200 for driving the lifting elements 14, 15 is used. If the Main lift unit 22, 23 is to be raised or lowered, the two seat valves 18, 19 are opened.
  • the seat valves 20, 21 are opened and the cylinders 16, 17 are connected to the control unit 200.
  • the control valves 8, 9 and the flow divider 2 are equally responsible for the Haupthubüen 22, 23 and for the Rajhubüen 24, 25.
  • the electrical measuring units 28, 30 can be designed for example as an ultrasonic measuring device and / or cable feeders. They are arranged so that not only the lifting height of the Feldhubech 22, 23 or Sakhubech 24, 25 is measured, but the sum of the heights of a Haupthubech 22, 23 arranged thereon 1925.
  • the control unit 200 are counters for the Hub Why the main and Sakhubü separated from each other, by the Hub Whyn selectedung the respective lifting unit is assigned according to the valve position of the main actuators 18, 19 and the additional actuators 20, 21.
  • operating elements are provided for operating the lifting device.
  • an operating element for lifting and a further operating element for lowering the respective lifting unit 22, 23, 24, 25 are provided for the main lifting units 22, 23 and for the additional lifting units 24, 25.
  • the control unit 200 may be in communication with an input unit 60 included in the FIG. 3 by way of example and not limitation, a keyboard is shown by which an operator can input the above-mentioned desired positions of the main lift unit 22, 23 and the additional lift unit 24, 25.
  • the control unit 200 further communicates with a display unit 70 which can display data regarding the target lift height values of the main lift height and the total lift height and can output data of the actual heights of the main lift unit 22, 23 and the auxiliary lift unit 24, 25.
  • the Haupthubech 22, 23 and the Rajhubech 24, 25 are each designed as a pillar lifts or ram lifts and / or a combination of post lifts, rams and / or scissor lifts.

Description

Die Erfindung betrifft eine Hebevorrichtung zum Heben von Gegenständen, insbesondere von Fahrzeugen, mit einer Haupthubeinheit und einer Zusatzhubeinheit, wobei zur Verminderung der notwendigen Mess- und Steuermittel für die gesamte Hebevorrichtung, die aus einer Haupthubeinheit und einer Zusatzhubeinheit bestehen kann, nur ein einzelnes Hydraulikaggregat mit entsprechenden Steuerelementen verwendet werden kann.The invention relates to a lifting device for lifting objects, in particular of vehicles, with a Haupthubeinheit and a Zusatzhubeinheit, wherein to reduce the necessary measuring and control means for the entire lifting device, which may consist of a Haupthubeinheit and a Zusatzhubeinheit, only a single hydraulic unit with corresponding controls can be used.

Es sind am Markt Hebegeräte bekannt, die über eine Haupthubeinheit und eine Zusatzhubeinheit verfügen. Solche Hubeinheiten können zum einen sogenannte Scherenhebebühnen sein wie beispielsweise in Fig. 1 dargestellt. Es sind jedoch auch Stempelhebebühnen bekannt, die über eine Haupthubeinheit und eine Zusatzhubeinheit verfügen, wie beispielsweise in der US 2007/0119658 A1 beschrieben.There are known on the market lifting equipment, which have a Haupthubeinheit and a Zusatzhubeinheit. Such lifting units may be for a so-called scissor lifts such as in Fig. 1 shown. However, there are also known lifting racks, which have a Haupthubeinheit and Zusatzhubeinheit, such as in the US 2007/0119658 A1 described.

DE 32 40 952 A1 beschreibt eine Hubvorrichtung für Kraftfahrzeuge mit zwei unabhängig voneinander angeordneten Scheren mit daraufliegenden Schienen. Die Synchronisation der beiden Scheren erfolgt über zwei gemeinsam angetriebene Pumpen. Zur Überwachung eines erzwungenen Ungleichlaufs ist zwischen den beiden Scheren ein federnd aufgehängtes Seil vorgesehen. DE 32 40 952 A1 describes a lifting device for motor vehicles with two independently arranged scissors with rails thereon. The synchronization of the two shears takes place via two jointly driven pumps. To monitor a forced nonuniformity a spring suspended rope is provided between the two shears.

DE 32 40 952 A1 offenbart den Oberbegriff des Anspruchs 1. DE 32 40 952 A1 discloses the preamble of claim 1.

US 5 024 141 A offenbart eine Hebevorrichtung mit einer Sensoranordnung, in dem der Synchronverlauf der Zylinder mit Impulsgeber und Sensoren gewährleistet wird, und die Hydraulikzylinder werden dabei einzeln angesteuert. US 5 024 141 A discloses a lifting device with a sensor arrangement in which the synchronous course of the cylinder with pulse generator and sensors is ensured, and the hydraulic cylinders are individually controlled.

WO 95/11189 A1 offenbart eine Hebevorrichtung, wobei zwei Bypassventile vorgesehen sind, die durch eine Steuereinheit ansteuerbar sind. Die Sensoren messen eine Ausfahrlänge der Zylinder. WO 95/11189 A1 discloses a lifting device, wherein two bypass valves are provided, which are controllable by a control unit. The sensors measure an extension length of the cylinders.

US 6 189 432 B1 offenbart eine Hebevorrichtung mit Sensoren, die eine Hubhöhe vermessen. Gleichlauf wird durch eine Steuereinheit, die eine Bypassventil ansteuert, gewährleistet. US Pat. No. 6,189,432 B1 discloses a lifting device with sensors that measure a lifting height. Synchronization is ensured by a control unit that controls a bypass valve.

Bei allen bisher bekannten Hebevorrichtungen wird das Haupthubwerk und das Zusatzhubwerk kaskadiert angetrieben, wobei sich eine Gesamthubhöhe ergibt, die größer ist als die Hubhöhen der einzelnen Hubwerke. Dabei wird zunächst das Haupthubwerk angehoben und anschließend das Zusatzhubwerk ausgefahren. Handelsübliche Hebebühnen weisen zwei Fahrschienen auf, die mit einem Fahrzeug befahrbar sind. Dabei wird für jede Fahrschiene beispielsweise jeweils eine Scherenhebebühne verwendet, um eine ausreichende Zugänglichkeit zum Fahrzeugboden zu gewährleisten. Zwischen den zwei Scherenhebebühnen sind keinerlei mechanische Verbindungselemente vorgesehen. Da diese Scherenhebebühnen unabhängig voneinander anhebbar sind, besteht daher die technische Notwendigkeit, die Hubhöhe der beiden Fahrschienen, (linke und rechte Fahrschiene) permanent auf ein gleiches Niveau zu bringen und zu halten.In all lifting devices known hitherto, the main lifting gear and the additional lifting gear are driven in cascade, resulting in a total lifting height which is greater than the lifting heights of the individual lifting units. First, the main lift is raised and then extended the additional hoist. Commercially available lifting platforms have two rails, which are accessible by a vehicle. In each case, a scissor lift is used for each rail, for example, to ensure sufficient accessibility to the vehicle floor. Between the two Scissor lifts are no mechanical fasteners provided. Since these scissor lifts are independently raised, therefore, there is a technical need to bring the lifting height of the two rails, (left and right rail) permanently to the same level and to hold.

Hierbei sind bisher unterschiedliche Lösungen am Markt bekannt. Eine Möglichkeit sind sog. Geber-/Nehmersysteme, wobei nur ein Zylinder von beispielsweise der linken Fahrzeughälfte vom Hydraulikaggregat mit Öl beaufschlagt wird. Das im Zylinderstangenraum verdrängte Öl wird mit dem Kolbenraum der rechten Fahrzeughälfte verbunden. Wenn nun das Kolbenvolumen der rechten Fahrzeughälfte und das Stangenvolumen der linken Fahrzeughälfte gleich groß sind, wird eine Zwangssynchronität der Hubwerke erreicht. Eine solche Technik wird bei Haupthubwerken und bei Zusatzhubwerken gleichermaßen angewendet.Here are so far different solutions known in the market. One possibility is so-called. Geber- / Nehmersysteme, with only one cylinder of, for example, the left half of the vehicle is acted upon by the hydraulic unit with oil. The displaced in the cylinder rod space oil is connected to the piston chamber of the right half of the vehicle. Now, if the piston volume of the right half of the vehicle and the rod volume of the left half of the vehicle are the same size, a forced synchrony of the hoists is achieved. Such a technique is equally applied to main hoists and additional hoists.

Dabei stellt sich das Problem, dass ein verhältnismäßig großer Verkabelungs- und Verschlauchungsaufwand notwendig ist. Außerdem gestaltet sich die Elektronik der Hydraulikanlage sehr schwierig. Ferner müssen Mittel vorgesehen werden, damit kleine Leckagen an den Zylindern ausgeglichen werden können.This raises the problem that a relatively large cabling and tubing is necessary. In addition, the electronics of the hydraulic system designed very difficult. Furthermore, means must be provided so that small leaks can be compensated on the cylinders.

Darüber hinaus sind auch Techniken bekannt, die eine elektrohydraulische Gleichlaufsteuerung anwenden. Dabei werden die Wege der Haupthubeinheit und der Zusatzhubeinheit über elektrische Messeinheiten erfasst. Die Hebebühne wird über einen sog. Mengenteiler bzw. eine Druckwaage mit Öl versorgt, wobei der Mengenteiler für einen groben Gleichlauf der beiden Hebebühnenteile sorgt. Bei ungleicher Lastverteilung ergeben sich jedoch Höhendifferenzen, die ausgeglichen werden müssen. Dazu werden die von den elektronischen Gebern erzeugten Signale verglichen und entsprechende hydraulische Stellglieder zum Ausgleich der Hubhöhen angesteuert. Die hydraulischen Steuerelemente sind ebenso wie die elektrischen Messeinheiten jeweils für die Haupthub- und für die Zusatzhubeinheit erforderlich. Hierzu sind elektrische Messeinheiten an den beiden Haupthubeinheiten und den beiden Zusatzhubeinheiten erforderlich. Des Weiteren sind alle Regelungen ebenfalls doppelt auszuführen.In addition, techniques are also known which use electro-hydraulic synchronization control. In this case, the paths of the main lifting unit and the additional lifting unit are detected by electrical measuring units. The lift is supplied via a so-called flow divider or a pressure compensator with oil, the Flow divider for a rough synchronization of the two lift parts ensures. With uneven load distribution, however, height differences arise, which must be compensated. For this purpose, the signals generated by the electronic encoders are compared and controlled corresponding hydraulic actuators to compensate for the lifting heights. The hydraulic controls are as well as the electrical measuring units required for the Haupthub- and for the additional lifting unit. For this purpose, electrical measuring units are required on the two main lifting units and the two additional lifting units. Furthermore, all regulations must also be duplicated.

Hieraus ergibt sich der Nachteil, dass ein entsprechend hoher technischer Aufwand nötig ist und überdies die Installation einer solchen Hebebühne sich entsprechend aufwendig gestaltet.This results in the disadvantage that a correspondingly high technical complexity is necessary and, moreover, the installation of such a lift is designed to be correspondingly expensive.

Aufgabe der Erfindung ist es, eine Hebevorrichtung zum Heben von Gegenständen, insbesondere Fahrzeugen zu schaffen, die mit möglichst wenig Messmitteln und Steuermitteln auskommt.The object of the invention is to provide a lifting device for lifting objects, in particular vehicles, which manages with as few measuring means and control means.

Diese Aufgabe wird durch eine Vorrichtung und ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Die abhängigen Patentansprüche betreffen vorteilhafte Weiterbildungen der Erfindung.This object is achieved by a device and a method having the features of claim 1. The dependent claims relate to advantageous developments of the invention.

Die erfindungsgemäße Hebevorrichtung zum Heben von Gegenständen, insbesondere von Fahrzeugen weist zumindest zwei Haupthubeinheiten und zumindest zwei Zusatzhubeinheiten auf. Die Zusatzhubeinheit ist derart an der Haupthubeinheit angeordnet, dass mit der Zusatzhubeinheit eine Haupthubhöhe der Hebebühne auf eine Gesamthubhöhe verlängerbar ist. Ferner ist eine Steuereinheit vorgesehen, die dadurch gekennzeichnet ist, dass mit der Steuereinheit sowohl die Haupthubeinheit wie auch die Zusatzhubeinheit ansteuerbar ist. Darüber hinaus sind zumindest ein Hauptstellglied pro Haupthubeinheit und zumindest ein Zusatzstellglied pro Zusatzhubeinheit vorgesehen, wobei das Hauptstellglied und das Zusatzstellglied derart voneinander abhängig schaltbar sind, dass alternativ nur jeweils das Hauptstellglied oder das Zusatzstellglied in einen aktiven bzw. aktivierten Zustand überführbar ist. Durch Verwendung einer einzigen Steuereinheit für beide Hubeinheiten kann auf besonders einfach Weise der Verkabelungsaufwand reduziert werden und somit die Zugänglichkeit unterhalb eines zu hebenden Gegenstandes verbessert werden. Darüber hinaus ergibt sich auch der Vorteil, dass die Anzahl der Bauteile reduziert werden kann.The lifting device according to the invention for lifting objects, in particular of vehicles, has at least two main lifting units and at least two additional lifting units on. The additional lifting unit is arranged on the main lifting unit such that with the additional lifting unit, a main lifting height of the lifting platform can be extended to a total lifting height. Furthermore, a control unit is provided which is characterized in that both the main lifting unit and the additional lifting unit can be controlled by the control unit. In addition, at least one main actuator per Haupthubeinheit and at least one additional actuator per Zusatzhubeinheit provided, wherein the main actuator and the auxiliary actuator are switched dependent on each other, that alternatively only each of the main actuator or the additional actuator in an active or activated state can be transferred. By using a single control unit for both lifting units, the cabling effort can be reduced in a particularly simple manner and thus the accessibility under an object to be lifted can be improved. In addition, there is also the advantage that the number of components can be reduced.

Weiterhin ist eine Messeinheit vorgesehen, mit der die Gesamthubhöhe, die sich aus der Summe der Haupthubhöhe der Haupthubeinheit und der Hubhöhe der Zusatzhubeinheit ergibt, gemeinsam erfassbar ist. Damit kann die Anzahl der verwendeten Bauteile weiter reduziert werden.Furthermore, a measuring unit is provided, with which the total lifting height, which results from the sum of the main lifting height of the main lifting unit and the lifting height of the additional lifting unit, is collectively detectable. Thus, the number of components used can be further reduced.

Die Steuereinheit ist eine hydraulische Regeleinheit, die einen Strom- bzw. Mengenteiler und zwei Bypassventile aufweist, wobei mit der Steuereinheit alternativ eine Gleichlaufsteuerung der Haupthubeinheiten oder der Zusatzhubeinheiten durchführbar ist.The control unit is a hydraulic control unit having a flow divider and two bypass valves, wherein with the control unit alternatively a synchronization control of the Haupthubeinheiten or Zusatzhubeinheiten is feasible.

Dabei kann die Steuereinheit eine Steuer- und/oder Regeleinheit sein und die Hauptstellglieder und Zusatzstellglieder können als Sitzventile ausgebildet sein.In this case, the control unit may be a control and / or regulating unit and the main actuators and additional actuators may be designed as seat valves.

Die Hubeinheiten können hydraulisch betätigt werden. Es kann sich bei den Hubeinheiten bzw. bei der Hebevorrichtung um Unterflurbühnen mit Stempeln, um Säulenhebebühnen, jeweils eventuell auch mit Teleskopbetätigung, und/oder um Schwenkhebebühnen handeln.The lifting units can be hydraulically operated. It may be in the lifting units or in the lifting device to underground stages with punches, to pillar lifts, possibly also with telescopic actuation, and / or swing lifts.

Weiterhin kann das Hauptstellglied in einen offenen bzw. aktiven Zustand, in dem die Haupthubeinheit ansteuerbar ist und in einen geschlossenen bzw. inaktiven Zustand, in dem die Haupthubeinheit nicht ansteuerbar ist, überführbar sein, und/oder das Zusatzstellglied in einen offenen bzw. aktiven Zustand, in dem die Zusatzhubeinheit ansteuerbar ist und in einen geschlossenen bzw. inaktiven Zustand, in dem die Zusatzhubeinheit nicht ansteuerbar ist, überführbar sein, wobei wenn das Hauptstellglied in einem offenen bzw. aktiven Zustand ist, das Zusatzstellglied nur in einen geschlossenen bzw. inaktiven Zustand überführbar ist, und/oder wenn das Zusatzstellglied in einem offenen bzw. aktiven Zustand ist, das Hauptstellglied nur in einen geschlossenen bzw. inaktiven Zustand überführbar ist. Damit kann sichergestellt werden, dass die einzelnen Hubeinheiten nicht gleichzeitig bedienbar sind und dadurch die Gefahr einer Fehlerfassung eines Gleichlaufs durch die Steuereinheit, obwohl die Hubeinheiten ungleiche Hubbewegungen durchführen ausgeschlossen ist.Furthermore, the main actuator can be in an open or active state in which the Haupthubeinheit is controlled and in a closed or inactive state in which the Haupthubeinheit is not controllable, convertible, and / or the additional actuator in an open or active state in which the additional lifting unit is activatable and in a closed or inactive state in which the Zusatzhubeinheit is not controllable, be transferable, wherein when the main actuator is in an open or active state, the additional actuator only in a closed or inactive state is convertible, and / or when the additional actuator is in an open or active state, the main actuator is only in a closed or inactive state can be transferred. This can ensure that the individual lifting units can not be operated simultaneously and thus the risk of error detection of a synchronization by the control unit, although the lifting units perform uneven lifting movements is excluded.

Weiterhin kann wenn eine Hubdifferenz einen ersten Grenzwert überschreitet ein Bypassventil der jeweils höheren Haupthubeinheit und/oder Zusatzhubeinheit zeitlich begrenzt in einen geöffneten Zustand überführbar ist. Dadurch ergibt sich der Vorteil, dass geringfügige Hubdifferenzen zwischen den jeweiligen Hubeinheiten einer Fahrschiene bzgl. der anderen Fahrschiene ausgeglichen werden können, ohne dabei die Hubbewegung der Hebebühne zu unterbrechen.Furthermore, when a lift difference exceeds a first limit value, a bypass valve of the respective higher main lift unit and / or additional lift unit can be temporarily transferred into an open state. This results in the advantage that minor differences in stroke between the respective lifting units of a running rail with respect to. The other rail can be compensated without interrupting the lifting movement of the lift.

Weiterhin kann wenn die Hubdifferenz einen zweiten Grenzwert überschreitet zusätzlich zum Öffnen des Bypassventils ein erstes Absperrventil in einen geschlossenen Zustand überführbar sein. Dadurch kann auf besonders einfache Weise eine Hubdifferenz zwischen den Hubeinheiten ausgeglichen werden, wobei dieser Ausgleich schneller erfolgt als wenn nur das Bypassventil der jeweils höheren Hubeinheit zeitlich begrenzt geöffnet wird.Furthermore, if the stroke difference exceeds a second limit value in addition to opening the bypass valve, a first shut-off valve can be transferred to a closed state. As a result, a stroke difference between the lifting units can be compensated in a particularly simple manner, wherein this compensation is faster than when only the bypass valve of each higher lifting unit is opened for a limited time.

Weiterhin kann wenn die Hubdifferenz einen zweiten Grenzwert überschreitet zusätzlich zum Öffnen des Bypassventils ein zweites Absperrventil in einen geschlossenen Zustand überführbar sein. Daraus ergibt sich der Vorteil, dass bei dem Auftreten einer Hubdifferenz sowohl mit der Haupthubeinheit wie auch mit der Zusatzhubeinheit diese Hubdifferenz ausgeglichen werden kann.Furthermore, if the stroke difference exceeds a second limit value in addition to opening the bypass valve, a second shut-off valve can be converted into a closed state. This results in the advantage that when a difference in stroke occurs both with the main lifting unit and with the additional lifting unit, this stroke difference can be compensated.

Weiterhin kann wenn die Hubdifferenz einen Maximalwert überschreitet die Hebevorrichtung stilllegbar sein, indem alle Absperrventile in einen geschlossenen Zustand überführbar sind und ein Pumpenaggregat außer Betrieb setzbar ist. Dies bietet den Vorteil, dass bei Auftreten von einer unzulässigen Hubdifferenz zwischen den Hebebühnen die Gesamtanlage abgeschaltet werden kann, wobei sichergestellt werden kann, dass ein Herabstürzen eines auf der Hubeinheit befindlichen Gegenstandes wie beispielsweise ein Fahrzeug verhindert werden kann.Furthermore, when the stroke difference exceeds a maximum value, the lifting device can be immobilized by all Shut-off valves can be converted into a closed state and a pump unit can be put out of service. This has the advantage that when an impermissible difference in lift between the lifts occurs, the entire system can be switched off, it being possible to ensure that a fall of an object on the lifting unit, for example a vehicle, can be prevented.

Weiterhin kann die Hebevorrichtung dadurch gekennzeichnet sein, dass zumindest eine Messeinheit pro Hubelement vorgesehen ist, wobei das Hubelement eine Haupthubeinheit, die mit zumindest einer Zusatzhubeinheit in Verbindung steht umfassen kann, wobei mit der Messeinheit eine Gesamthubhöhe, die sich aus der Summe der Hubhöhe der Haupthubeinheit und der Hubhöhe der Zusatzhubeinheit ergibt, gemeinsam erfassbar sein kann. Daraus ergibt sich der Vorteil, dass die Anzahl der Bauteile weiter reduziert werden kann, da ausschließlich die Position der Zusatzhubeinheiten zueinander entscheidend ist für die sichere Auflage des zu hebenden Gegenstandes. Wenn die Zusatzhubeinheit nicht zum Einsatz kommt, sondern das Fahrzeug nur mit der Haupthubeinheit gehoben wird, so befindet sich die Zusatzhubeinheit jeweils auf der Haupthubeinheit und kann durch Messen des Abstandes von der Bodenfläche zu der Zusatzhubeinheit Auskunft über die Höhe der Haupthubeinheit geben. Somit ist es nicht mehr notwendig zusätzliche Sensoren an den Haupthubeinheiten vorzusehen.Furthermore, the lifting device may be characterized in that at least one measuring unit is provided per lifting element, wherein the lifting element may comprise a Haupthubeinheit associated with at least one Zusatzhubeinheit in connection with the measuring unit a total lift height, which is the sum of the lifting height of the Haupthubeinheit and the lifting height of the additional lifting unit results, can be collectively detected. This results in the advantage that the number of components can be further reduced, since only the position of Zusatzhubeinheiten to each other is crucial for the secure support of the object to be lifted. If the Zusatzhubeinheit not used, but the vehicle is lifted only with the Haupthubeinheit, the Zusatzhubeinheit is located respectively on the Haupthubeinheit and can give by measuring the distance from the bottom surface to the Zusatzhubeinheit information about the height of the Haupthubeinheit. Thus, it is no longer necessary to provide additional sensors on the Haupthubeinheiten.

Weiterhin kann die Hebevorrichtung dadurch gekennzeichnet sein, dass die Messeinheit durch eine berührungslose Messeinrichtung ausgebildet ist und dass die Hubhöhe zwischen einer Bodenfläche und der Zusatzhubeinheit erfasst wird, wodurch unmittelbar die Gesamthubhöhe der Hebebühne erfassbar ist.Furthermore, the lifting device may be characterized in that the measuring unit is formed by a non-contact measuring device and that the lifting height between a bottom surface and the additional lifting unit is detected, whereby the total lifting height of the lift can be detected directly.

Weiterhin kann die Hebevorrichtung dadurch gekennzeichnet sein, dass die Messeinheit durch einen Seilzugsensor gebildet wird, wobei der Seilzugsensor am Boden befestigt ist und ein Auszugsseil mit der Zusatzhubeinheit verbunden ist.Furthermore, the lifting device may be characterized in that the measuring unit is formed by a cable pull sensor, wherein the Seilzugsensor is fixed to the ground and a pull-out rope is connected to the Zusatzhubeinheit.

Weiterhin kann die Hebevorrichtung dadurch gekennzeichnet sein, dass die Messeinheit durch einen Seilzugsensor gebildet ist, wobei der Seilzugsensor an der Zusatzhubeinheit befestigt ist und das Auszugsseil mit dem Boden verbunden ist.Furthermore, the lifting device may be characterized in that the measuring unit is formed by a cable pull sensor, wherein the cable pull sensor is attached to the Zusatzhubeinheit and the pull-rope is connected to the ground.

Ein erfindungsgemäßes Verfahren zur Steuerung einer erfindungsgemäßen Hebevorrichtung kann folgende Schritte aufweisen:

  • Auswahl zumindest zweier zu steuernden Haupthubeinheiten oder Zusatzhubeinheiten,
  • Steuerung einer Hub- und/oder Senkbewegung der ausgewählten Haupthubeinheiten oder Zusatzhubeinheiten, wobei wenn eine Hubdifferenz zwischen den Haupthubeinheit oder den Zusatzhubeinheiten einen ersten Grenzwert überschreitet, ein Bypassventil der jeweils höheren Haupthubeinheit oder Zusatzhubeinheit zeitlich begrenzt geöffnet werden kann.
An inventive method for controlling a lifting device according to the invention may comprise the following steps:
  • Selection of at least two main lifting units or additional lifting units to be controlled,
  • Controlling a lifting and / or lowering movement of the selected Haupthubeinheiten or Zusatzhubeinheiten, wherein when a difference in stroke between the Haupthubeinheit or Zusatzhubeinheiten exceeds a first limit, a bypass valve of each higher Haupthubeinheit or Zusatzhubeinheit can be opened for a limited time.

Weiterhin kann wenn die Hubdifferenz einen zweiten Grenzwert überschreitet zusätzlich zum Öffnen des Bypassventils ein erstes Absperrventil geschlossen werden.Furthermore, when the stroke difference exceeds a second limit in addition to opening the bypass valve, a first shut-off valve can be closed.

Weiterhin kann wenn die Hubdifferenz einen zweiten Grenzwertes überschreitet zusätzlich zum Öffnen des Bypassventils ein zweites Absperrventil geschlossen werden.Furthermore, when the stroke difference exceeds a second limit, in addition to opening the bypass valve, a second shut-off valve can be closed.

Weiterhin kann Hebevorrichtung stillgelegt werden, wenn die Hubdifferenz einen Maximalwert überschreitet, indem alle Absperrventile geschlossen werden und ein Pumpenaggregat außer Betrieb gesetzt wird.Furthermore, lifting device can be shut down when the stroke difference exceeds a maximum value by all shut-off valves are closed and a pump set is put out of service.

Im Folgenden wird die Erfindung beispielhaft anhand von schematischen Zeichnungen näher erläutert. Es zeigen:

Figur 1A
eine Seitenansicht einer Hebevorrichtung,
Figur 1B
eine Draufsicht auf eine Hebevorrichtung,
Figur 2
einen Hydraulikplan der Hebevorrichtung, und
Figur 3
eine weitere Ansicht der Hebevorrichtung.
In the following the invention will be explained by way of example with reference to schematic drawings. Show it:
Figure 1A
a side view of a lifting device,
FIG. 1B
a top view of a lifting device,
FIG. 2
a hydraulic plan of the lifting device, and
FIG. 3
another view of the lifting device.

In der Fig. 1A/1B ist eine Hebevorrichtung gezeigt mit jeweils einer Haupthubeinheit 22, 23 die als Scherenhebebühne ausgebildet ist. Die Haupthubeinheiten 22, 23 weisen eine Basis 110 auf, die mit einer Bodenfläche 130, beispielsweise einer Werkstatthalle, in Verbindung stehen. Die Haupthubeinheiten 22, 23 weisen weiterhin jeweils eine Fahrschiene 202 und ein Hubelement 14, 15 auf, wobei mit den Hubelementen 14, 15,die in Form von Hydraulikzylindern ausgebildet sind, über den Scherenmechanismus die jeweilige Fahrschiene 202 im Wesentlichen senkrecht zu der Bodenfläche 130 bewegt werden kann. Wie in der Figur 1B dargestellt, sind 2 Fahrschienen 202 vorgesehen und dementsprechend jeweils für jede Fahrschiene ein Haupthubelement 14, 15. Dasselbe gilt für die beiden Träger 201, für die jeweils ein Zusatzhubelement 16, 17 (siehe auch Fig. 2) vorgesehen ist.In the Fig. 1A / 1B a lifting device is shown, each with a Haupthubeinheit 22, 23 which is designed as a scissor lift. The main lifting units 22, 23 have a base 110, which communicate with a bottom surface 130, for example a workshop hall. The main lifting units 22, 23 furthermore each have a running rail 202 and a lifting element 14, 15, with the lifting elements 14, 15, which are in the form of hydraulic cylinders, moving the respective running rail 202 substantially perpendicular to the bottom surface 130 via the scissor mechanism can be. Like in the FIG. 1B 2, two rails 202 are provided and correspondingly for each rail a Hauptthubelement 14, 15. The same applies to the two carriers 201, for each of which a Zusatzhubelement 16, 17 (see also Fig. 2 ) is provided.

Auf jeder Fahrschiene 202 kann jeweils eine Zusatzhubeinheit 24, 25 vorgesehen sein, ebenfalls in Form einer Scherenhebebühne. Die Zusatzhubeinheiten 24, 25 können jeweils einen Träger 201 aufweisen, der im Wesentlichen parallel zur Fahrschiene 202 angeordnet ist. Der Träger 201 kann eine Hubbewegung, im Wesentlichen senkrecht zu der Bodenfläche 130 durchführen. Die Hubbewegung des Trägers 201 wird durch ein jeweiliges Hubelement 16, 17 in Form eines Hydraulikzylinders bewerkstelligt. Der Träger 201 kann mit einem Unterboden eines Fahrzeuges (nicht dargestellt) in Kontakt gebracht werden, um das Fahrzeug auf beispielsweise eine Gesamthubhöhe hg anzuheben.On each rail 202, an additional lifting unit 24, 25 may be provided, also in the form of a scissor lift. The additional lifting units 24, 25 may each have a carrier 201, which is arranged substantially parallel to the running rail 202. The carrier 201 may perform a lifting movement, substantially perpendicular to the bottom surface 130. The lifting movement of the carrier 201 is accomplished by a respective lifting element 16, 17 in the form of a hydraulic cylinder. The carrier 201 may be connected to an underbody of a vehicle (not shown) be brought into contact, for example, to raise the vehicle to a total lift height hg.

Bei weiteren nicht dargestellten Ausführungsformen der Erfindung können die Hubelemente 14, 15, 16, 17 als Hydraulikzylinder, Stempel, Säulen und/oder als Spindel ausgeführt sein.In further embodiments of the invention, not shown, the lifting elements 14, 15, 16, 17 may be designed as a hydraulic cylinder, stamp, columns and / or spindle.

Weiterhin sind schematische Messeinheiten dargestellt, die zumindest eine Sendeeinheit 28 und/oder zumindest eine Empfangseinheit 30 umfassen. Es ist für jede Seite der Hebevorrichtung jeweils eine Sende- und Empfangseinheit 28, 30 vorgesehen. Dabei kann am Werkstatthallenboden 130 die Sendeeinheit 28 angebracht sein, die Signale berührungslos beispielsweise in Form eines Laserstrahls und/oder Infrarotsignals an eine Empfangseinheit 30 sendet, die jeweils an einer Unterseite des Trägers 201 der Zusatzhubeinheit 24, 25 angebracht ist. Dadurch ergibt sich eine Messstrecke 27. Die Messeinheiten 28, 30 zum Erfassen der Hubhöhe können jedoch auch als Ultraschallsensor oder als Seilzug ausgebildet sein. An dieser Stelle sei ausdrücklich erwähnt, dass die Anordnungen der Sendeeinheit 28 und Empfangseinheit 30 auch vertauscht werden können, das heißt, dass die Empfangseinheit 30 an der Bodenfläche 130 bzw. an einem nicht bewegten Teil angeordnet werden kann und die Sendeeinheit 28 an dem Träger 201 bzw. einem bewegten Teil angeordnet werden kann.Furthermore, schematic measuring units are shown which comprise at least one transmitting unit 28 and / or at least one receiving unit 30. In each case one transmitting and receiving unit 28, 30 is provided for each side of the lifting device. In this case, the transmission unit 28 can be mounted on the workshop floor 130, which transmits signals without contact, for example in the form of a laser beam and / or infrared signal to a receiving unit 30, which is in each case attached to an underside of the carrier 201 of the additional lifting unit 24, 25. This results in a measuring section 27. However, the measuring units 28, 30 for detecting the lifting height can also be designed as an ultrasonic sensor or as a cable pull. It should be expressly mentioned at this point that the arrangements of the transmitting unit 28 and receiving unit 30 can also be reversed, that is to say that the receiving unit 30 can be arranged on the bottom surface 130 or on a non-moving part, and the transmitting unit 28 on the carrier 201 or a moving part can be arranged.

Eine Steuereinheit 200 (siehe Fig. 2) steht mit den Hubelementen 14, 15 der Haupthubeinheiten 22, 23 und den Hubelementen 16, 17 der Zusatzhubeinheiten 24, 25 in Verbindung und kann die Hubelemente 16, 17 derart ansteuern, dass die Fahrschienen 202 der Haupthubeinheiten 22, 23 eine Haupthubhöhe hh und die Träger 201 der Zusatzhubeinheiten 24, 25 eine Gesamthubhöhe hg anfahren. Weiterhin steht die Steuereinheit 200 mit der bzw. den Sendeeinheiten 28 in Verbindung, wobei die Sendeeinheit 28 an die Steuereinheit 200 Signaldaten bezüglich der tatsächlichen Ist-Höhe der Haupthubeinheiten 22, 23 sowie der Zusatzhubeinheiten 24, 25 übermittelt. Die Steuereinheit 200 erfasst somit permanent die Ist-Haupthubhöhe hh-ist und die Ist-Gesamthubhöhe hg-ist und führt permanent einen Vergleich mit der Soll-Haupthubhöhe hh-soll und der Soll-Gesamthubhöhe hg-soll durch. Damit steuert bzw. regelt die Steuereinheit 200 die aktuelle Höhe der Haupthubeinheiten 22, 23 sowie der Zusatzhubeinheiten 24, 25 und steuert die Hubeinheiten 22, 23, 24 und 25 derart ein, dass die Soll-Position der jeweiligen Hubeinheit 22, 23, 24 und 25 erreicht wird.A control unit 200 (see Fig. 2 ) communicates with the lifting elements 14, 15 of the Haupthubeinheiten 22, 23 and the lifting elements 16, 17 of the Zusatzhubeinheiten 24, 25 and can control the lifting elements 16, 17 such that the rails 202 of the Haupthubeinheiten 22, 23 a Haupthubhöhe h h and the carriers 201 of the additional lifting units 24, 25 approach a total lifting height hg. Furthermore, the control unit 200 communicates with the transmission unit or units 28, the transmission unit 28 transmitting to the control unit 200 signal data relating to the actual actual height of the main lift units 22, 23 and the additional lift units 24, 25. The control unit 200 thus permanently detects the actual main lift height h h and the actual total lift height hg is and permanently performs a comparison with the desired main lift height h h -soll and the target total lift height hg-soll. Thus, the control unit 200 controls the current height of the Haupthubeinheiten 22, 23 and the Zusatzhubeinheiten 24, 25 and controls the lifting units 22, 23, 24 and 25 such that the desired position of the respective lifting unit 22, 23, 24 and 25 is reached.

In der Figur 1B sind die Fahrschienen 202 dargestellt. Die Fahrschienen 202 stehen dabei mit den Haupthubeinheiten 22, 23 in Verbindung. Ferner sind die Trageelemente 201 abgebildet, die mit den Zusatzhubeinheiten 24, 25 in Verbindung stehen. Nachdem ein Fahrzeug auf die Fahrschienen 202 aufgefahren ist, kann dieses mit den Tragelementen 201 angehoben werden, und damit auf die Gesamthubhöhe angehoben werden. In einer derartigen Position stehen die Räder des Fahrzeuges frei in der Luft.In the FIG. 1B the rails 202 are shown. The rails 202 are in this case with the Haupthubeinheiten 22, 23 in conjunction. Further, the support members 201 are shown, which are in communication with the Zusatzhubeinheiten 24, 25. After a vehicle is driven onto the rails 202, this can be lifted with the support members 201, and thus raised to the total lift height. In such a position, the wheels of the vehicle are free in the air.

In der Figur 2 ist ein hydraulischer Schaltplan der Hebevorrichtung abgebildet. Dabei wird für die gesamte Hebevorrichtung lediglich ein Hydraulikaggregat mit entsprechenden Steuerelementen verwendet.In the FIG. 2 A hydraulic circuit diagram of the lifting device is shown. In this case, only a hydraulic unit is used with appropriate controls for the entire lifting device.

Der von einer Hydraulikpumpe 1 erzeugte Ölstrom wird über den Mengenteiler 2 annähernd gleichmäßig an die Hubeinheiten 22, 23, 24 und/oder 25 verteilt.The oil flow generated by a hydraulic pump 1 is distributed approximately uniformly over the flow divider 2 to the lifting units 22, 23, 24 and / or 25.

Ein Rückschlagventil 3 sorgt dafür, dass bei stehendem Antriebsmotor 4 das Hydrauliköl nicht rückwärts über die Pumpe 1 und den Filter 5 in den Tank 6 fließen kann. Ferner ist ein Druckbegrenzerventil (DBV) 7 vorgesehen, um die Hubeinheiten sowie die gesamte Hydraulikanlage vor Überlast zu schützen. Wird durch die Messeinheiten eine unterschiedliche Hubhöhe festgestellt, so wird über eine Steuereinheit 200 eines der beiden Bypassventile 8, 9 geöffnet und ein Teil des Ölvolumenstroms in den Tank 6 zurückgeleitet. Dabei kann die Ausgleichsgeschwindigkeit über Drosselventile 10, 11 eingestellt werden. Zum Absenken der Hebebühne wird das Pumpaggregat 41 abgeschaltet und das Senkventil 12 geöffnet. Die Senkgeschwindigkeit wird über ein weiteres Drosselventil 13 reguliert. Wird beim Senkvorgang eine unterschiedliche Hubhöhe detektiert, so werden die Bypassventile 8, 9 geöffnet und auf der Seite der Hubeinheit mit einer größeren Höhe eine zusätzliche Ölmenge abgelassen.A check valve 3 ensures that when the drive motor 4, the hydraulic oil can not flow backwards through the pump 1 and the filter 5 in the tank 6. Further, a pressure relief valve (DBV) 7 is provided to protect the lifting units and the entire hydraulic system from overload. If a different lifting height is determined by the measuring units, then one of the two bypass valves 8, 9 is opened via a control unit 200 and a part of the oil volume flow is returned to the tank 6. In this case, the compensation speed can be adjusted via throttle valves 10, 11. To lower the lift, the pump unit 41 is turned off and the lowering valve 12 is opened. The lowering speed is regulated via a further throttle valve 13. If a different lifting height is detected during the lowering process, the bypass valves 8, 9 are opened and an additional quantity of oil is discharged on the side of the lifting unit with a greater height.

Bei einer weiteren zweckmäßigen Ausgestaltung der Erfindung wird das Hydraulikaggregat, (Steuer- und/oder Regeleinheit) 200 zum Ansteuern der Hubelemente 14, 15 verwendet. Wenn die Haupthubeinheit 22, 23 gehoben oder gesenkt werden soll, sind die beiden Sitzventile 18, 19 geöffnet.In a further advantageous embodiment of the invention, the hydraulic unit, (control and / or regulating unit) 200 for driving the lifting elements 14, 15 is used. If the Main lift unit 22, 23 is to be raised or lowered, the two seat valves 18, 19 are opened.

Sollen dagegen die Zusatzhubeinheiten 24, 25 verfahren werden, so sind die Sitzventile 20, 21 geöffnet und die Zylinder 16, 17 werden mit der Regeleinheit 200 verbunden. Die Regelventile 8, 9 sowie der Mengenteiler 2 sind für die Haupthubeinheiten 22, 23 sowie für die Zusatzhubeinheiten 24, 25 gleichermaßen zuständig.If, on the other hand, the additional lifting units 24, 25 are to be moved, then the seat valves 20, 21 are opened and the cylinders 16, 17 are connected to the control unit 200. The control valves 8, 9 and the flow divider 2 are equally responsible for the Haupthubeinheiten 22, 23 and for the Zusatzhubeinheiten 24, 25.

Die elektrischen Messeinheiten 28, 30 können beispielsweise als Ultraschallmesseinrichtung und/oder Seilzugeber ausgestaltet sein. Dabei werden sie so angeordnet, dass nicht nur die Hubhöhe der Haupthubeinheit 22, 23 oder Zusatzhubeinheit 24, 25 gemessen wird, sondern die Summe der Höhen einer Haupthubeinheit 22, 23 mit daran angeordneter Zusatzhubeinheit 24, 25. In der Steuereinheit 200 werden Zählwerke für die Hubhöhen der Haupt- und Zusatzhubeinheit voneinander getrennt, indem entsprechend der Ventilstellung der Hauptstellglieder 18, 19 und der Zusatzstellglieder 20, 21 die Hubhöhenänderung der jeweiligen Hubeinheit zugeordnet wird.The electrical measuring units 28, 30 can be designed for example as an ultrasonic measuring device and / or cable feeders. They are arranged so that not only the lifting height of the Haupthubeinheit 22, 23 or Zusatzhubeinheit 24, 25 is measured, but the sum of the heights of a Haupthubeinheit 22, 23 arranged thereon Zusatzhubeinheit 24, 25. In the control unit 200 are counters for the Hubhöhen the main and Zusatzhubeinheit separated from each other, by the Hubhöhenänderung the respective lifting unit is assigned according to the valve position of the main actuators 18, 19 and the additional actuators 20, 21.

Ferner sind Bedienelemente (nicht dargestellt) vorgesehen zum Bedienen der Hebevorrichtung. Dabei sind für die Haupthubeinheiten 22, 23 und für die Zusatzhubeinheiten 24, 25 jeweils ein Bedienelement zum Anheben und ein weiteres Bedienelement zum Absenken der jeweiligen Hubeinheit 22, 23, 24, 25 vorgesehen. Durch Betätigen des jeweiligen Hub- oder Absenk-Bedienelementes der Haupthubeinheit 22, 23 werden gleichzeitig zwei im Wesentlichen parallele Haupthubeinheiten 22, 23 simultan zu einer Hebe oder Senkbewegung veranlasst. Ebenso werden durch Betätigung der jeweiligen Hub- oder Absenk-Bedienelemente für die Zusatzhubeinheit 24, 25 zwei im Wesentlichen parallele Zusatzhubeinheiten 24, 25 zu einer Hebe- oder Senkbewegung veranlasst. Wenn die Steuereinheit 200 zur Steuerung einer Haupthubeinheit 22, 23 aufgeschaltet ist und ein Bedienelement zum Bedienen der Zusatzhubeinheit 24, 25 betätigt wird, findet eine Umschaltung der Steuereinheit 200 auf die Zusatzhubeinheit 24, 25 statt. Eine analoge Umschaltung findet statt, wenn zuletzt eine Zusatzhubeinheit 24, 25 mit der Steuereinheit 200 gesteuert wurde und ein Bedienelement der Haupthubeinheit 22, 23 betätigt wird.Furthermore, operating elements (not shown) are provided for operating the lifting device. In this case, an operating element for lifting and a further operating element for lowering the respective lifting unit 22, 23, 24, 25 are provided for the main lifting units 22, 23 and for the additional lifting units 24, 25. By operating the respective lifting or lowering control of the Haupthubeinheit 22, 23 are simultaneously two substantially parallel Haupthubeinheiten 22, 23 simultaneously caused to a raising or lowering movement. Likewise, by actuating the respective lifting or lowering control elements for the additional lifting unit 24, 25, two substantially parallel additional lifting units 24, 25 are caused to raise or lower. When the control unit 200 for controlling a main lift unit 22, 23 is switched on and an operating element for operating the additional lift unit 24, 25 is actuated, the control unit 200 is switched to the additional lift unit 24, 25. An analog switchover takes place when a Zusatzhubeinheit 24, 25 was last controlled with the control unit 200 and an operating element of the Haupthubeinheit 22, 23 is actuated.

Die Steuereinheit 200 kann mit einer Eingabeeinheit 60 in Verbindung stehen, die in der Figur 3 beispielhaft und nicht einschränkend als eine Tastatur dargestellt ist, über die ein Bediener die oben erwähnten Soll-Positionen der Haupthubeinheit 22, 23 sowie der Zusatzhubeinheit 24, 25 eingeben kann.The control unit 200 may be in communication with an input unit 60 included in the FIG. 3 by way of example and not limitation, a keyboard is shown by which an operator can input the above-mentioned desired positions of the main lift unit 22, 23 and the additional lift unit 24, 25.

Die Steuereinheit 200 steht weiterhin mit einer Anzeigeeinheit 70 in Verbindung, welche Daten bezüglich der Soll-Hubhöhenwerte der Haupthubhöhe sowie der Gesamthubhöhe anzeigen kann, sowie Daten der Ist-Höhen der Haupthubeinheit 22, 23 sowie der Zusatzhubeinheit 24, 25 ausgeben kann.The control unit 200 further communicates with a display unit 70 which can display data regarding the target lift height values of the main lift height and the total lift height and can output data of the actual heights of the main lift unit 22, 23 and the auxiliary lift unit 24, 25.

In einer nicht dargestellten weiteren Ausführungsform können die Haupthubeinheit 22, 23 sowie die Zusatzhubeinheit 24, 25 jeweils als Säulenhebebühnen oder Stempelhebebühnen und/oder aus einer Kombination aus Säulenhebebühnen, Stempelhebebühnen und/oder Scherenhebebühnen ausgeführt sein.In a further embodiment, not shown, the Haupthubeinheit 22, 23 and the Zusatzhubeinheit 24, 25 are each designed as a pillar lifts or ram lifts and / or a combination of post lifts, rams and / or scissor lifts.

Claims (11)

  1. A lifting device for lifting objects, in particular motor vehicles, comprising:
    - at least two main lifting units (22, 23),
    - at least two additional lifting units (24, 25),
    wherein at least one respective additional unit (24, 25) is disposed on one respective main lifting unit (22, 23) in such a way that by using the additional lifting unit (24, 25) a main lifting height (hh) of the lifting platform may be extended to a total lifting height (hg),
    - and comprising a control unit (200) by which both the main lifting units (22, 23) and the additional lifting units (24, 25) can be driven,
    - wherein each main control unit (22, 23) has one main control element (18, 19) and each additional lifting unit (24, 25) has one additional control element (20, 21),
    the main control elements (18, 19) and the additional control elements (20, 21) being switchable in dependence upon each other in such a manner that alternatively only the main control elements (18, 19) or the additional control elements (20, 21) may respectively be transferred into an active state, and
    - measuring units (28, 30) for detecting lifting heights on each side of the lifting device are provided,
    characterized in that the control unit (200) has a flow distributor or divider (2) and two by-pass valves (8, 9), the by-pass valves (8, 9) being arranged such that by opening one by-pass valve (8, 9) by means of the control unit (200) a part of an oil volume may be discharged back into an oil reservoir (6) from a connecting line between the flow distributor or divider (2) and the control elements (18-21) when the measuring units (28, 30) detect a difference in the lifting height,
    and that a synchronization control of the main lifting units (22, 23) or the additional lifting units (24, 25) may alternatively be performed by means of the control unit (200).
  2. The lifting device according to claim 1, characterized in that
    at least two measuring units (28, 30) are provided by means of which the total lifting height (hg) resulting from the sum of the main lifting height (hh) of a main lifting unit (22, 23) and the lifting height of the associated lifting unit (24, 25) is jointly determinable.
  3. The lifting device according to claim 1 or 2, characterized In that the main control element (18, 19) and/or the additional control element (20, 21) is a hydraulic and/or electrical actuator, the respective associated lifting unit (22-25) being operable hydraulically or electrically.
  4. The lifting device according to at least one of claims 1 to 3, wherein
    the main control element (18, 19) is transferable into an open state, in which the associated main lifting unit (22, 23) can be driven, and into a closed state in which the associated main lifting unit (22, 23) cannot be driven, and that
    the additional control element (20, 21) is transferable into an open state in which the associated additional lifting unit (24, 25) can be driven, and into a closed state in which the associated additional lifting unit (24, 25) cannot be driven, wherein,
    when the main control element (18, 19) is transferable into an open state, the additional control element (20, 21) is only transferable into a closed state, and
    when the additional control element (20, 21) is transferable into an open state, the main control element (18, 19) is only transferable into a closed state.
  5. The lifting device according to at least one of claims 1 to 4, characterized in that if a lifting difference exceeds a first limiting value, a by-pass valve (8, 9) of the respective higher main lifting unit (22, 23) and/or additional lifting unit (24, 25) is transferable into an opened state for a limited time.
  6. The lifting device according to at least one of claims 1 to 5, characterized in that if the lifting difference exceeds second limiting value, the main control element (18, 19) is transferable into a closed state in addition to opening the by-pass valve (8, 9).
  7. The lifting device according to at least one of claims 1 to 6, characterized in that if the lifting difference exceeds a second limiting value, the additional control element (20, 21) is transferable into a closed state in addition to opening the by-pass valve (8, 9).
  8. The lifting device according to at least one of claims 1 to 7, characterized in that if the lifting difference exceeds a maximum value, the lifting unit may be shut down in that the main and additional control elements (18, 19, 20, 21) are transferable into a closed state and a pumping set (41) may be put out of operation.
  9. The lifting device according to at least one of claims 1 to 8, characterized in that at least one measuring unit (28, 30) per lifting member is provided, wherein
    the lifting member comprises at least one main lifting unit (22, 23) connected to at least one additional lifting unit (24, 25),
    a total lifting height (hg) resulting from the sum of the main lifting height (hh) of the main lifting unit (22, 23) and the lifting height of the additional lifting unit (24, 25) being jointly determinable by means of the measuring unit (28, 30).
  10. The lifting device according to at least one of claims 1 to 9, characterized in that the measuring unit (28, 30) consists of a cable pull sensor, wherein
    the cable pull sensor is fixed to the floor, and a pull-out cable is connected to the additional lifting unit (24, 25), and/or the cable pull sensor is fixed to the additional lifting unit (24, 25) and the pull-out cable is connected to the floor.
  11. A method for controlling a lifting device according to at least one of claims 1 to 10, comprising the following steps:
    - selecting at least two main lifting units (22, 23) or additional lifting units (24, 25) to be controlled,
    - controlling a lifting and/or lowering movement of the selected main lifting units (22, 23) or additional lifting units (24, 25),
    wherein, if a lifting difference between the main lifting units (22, 23) or the additional lifting units (24, 25) exceeds a first limiting value, a by-pass valve (8, 9) of the respective higher main lifting unit (22, 23) or additional lifting unit (24, 25) may be opened for a limited time via a control unit (200) and thereby a part of an oil volume may be discharged back into an oil reservoir (6).
EP20090158517 2008-04-28 2009-04-22 Lifting system Not-in-force EP2113482B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09158517T PL2113482T3 (en) 2008-04-28 2009-04-22 Lifting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810021149 DE102008021149A1 (en) 2008-04-28 2008-04-28 hoist

Related Child Applications (1)

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EP12154011.6 Division-Into 2012-02-06

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EP2113482A1 EP2113482A1 (en) 2009-11-04
EP2113482B1 true EP2113482B1 (en) 2013-02-27

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EP20090158517 Not-in-force EP2113482B1 (en) 2008-04-28 2009-04-22 Lifting system

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US (1) US8262064B2 (en)
EP (1) EP2113482B1 (en)
CN (1) CN201538671U (en)
DE (1) DE102008021149A1 (en)
ES (1) ES2401538T3 (en)
PL (1) PL2113482T3 (en)
RU (1) RU2009115969A (en)

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US20090271041A1 (en) 2009-10-29
ES2401538T3 (en) 2013-04-22
US8262064B2 (en) 2012-09-11
DE102008021149A1 (en) 2009-10-29
EP2113482A1 (en) 2009-11-04
RU2009115969A (en) 2010-11-10
PL2113482T3 (en) 2013-08-30
CN201538671U (en) 2010-08-04

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