EP2078692A2 - Lifting system for an assembly device - Google Patents
Lifting system for an assembly device Download PDFInfo
- Publication number
- EP2078692A2 EP2078692A2 EP08021407A EP08021407A EP2078692A2 EP 2078692 A2 EP2078692 A2 EP 2078692A2 EP 08021407 A EP08021407 A EP 08021407A EP 08021407 A EP08021407 A EP 08021407A EP 2078692 A2 EP2078692 A2 EP 2078692A2
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- EP
- European Patent Office
- Prior art keywords
- lifting system
- cylinder
- mounting frame
- pneumatic cylinder
- lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C11/00—Trolleys or crabs, e.g. operating above runways
- B66C11/12—Trolleys or crabs, e.g. operating above runways having hoisting gear adapted to special load-engaging elements and not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Definitions
- the preset angular orientation of the mounting frame does not always coincide with the positional orientation of the component to be machined.
- the components themselves and their positioning relative to the assembly line are subject to dimensional tolerances.
- the coupled wire ropes are substantially rigid in the longitudinal direction. As a result of their parallel coupling an angular adjustment of the mounting frame as tolerance compensation is not or only partially possible.
- the invention has the object of developing a generic lifting system such that a compensation of positional tolerances with ease of use is possible.
- a lifting system in which at least one power transmission element is connected in series with a pneumatic cylinder.
- the piston in the pneumatic cylinder is movable against the force of applied gas pressure. Due to the compressibility of the gas filling in the pneumatic cylinder, a certain elasticity sets in. This elasticity is transmitted to the associated power transmission element as a result of the series connection.
- the user can lower the mounting frame in the intended processing position. Tolerance compensation can be accomplished manually by manually applying force to one of the corners of the mounting frame. As a result of the pneumatic elasticity of the associated pneumatic cylinder, this corner yields despite the otherwise substantially rigid force transmission elements.
- the mounting frame can be nestled against the component to be machined while compensating for positional tolerances, while its total weight is otherwise held by the force transmission elements.
- the pneumatic cylinder is a lifting cylinder for driving the associated power transmission element.
- the lifting cylinder takes over a double function: With appropriate control, the mounting frame can be raised or lowered, without requiring manual force is required. After positioning the mounting frame its elasticity allows the user to bring about a compensation of positional tolerances by manual pressing.
- a total of four force transmission elements arranged at a distance from each other are provided, two of which are combined in pairs and connected to a pneumatic cylinder. Due to the four power transmission elements, the mounting frame is precisely aligned with respect to its spatial angular position. The mutually coupled force transmission elements ensure that the mounting frame is raised or lowered in parallel while maintaining its intended spatial angular position.
- the arrangement of a total of two designed as a lifting cylinder pneumatic cylinders allows the user to use the respective pneumatic cylinder associated end of the mounting frame, regardless of the opposite end elastically yielding to bring about a position tolerance compensation.
- the at least one pneumatic cylinder designed as a lifting cylinder is arranged lying in a flat frame of the hoist.
- Frame and pneumatic cylinders require only a small height, so that a ceiling mounting above the production site is possible even at low room heights.
- the pneumatic cylinder is an elastically resilient, non-driven compensating cylinder.
- at least one compensating cylinder is connected in series with each force transmission element.
- the power transmission elements engage at four corners of the mounting frame, wherein at each vertex each a compensating cylinder is arranged. This allows the user to compensate for positional tolerances in all spatial degrees of freedom. This can be done in particular without actuation of the lifting cylinder.
- the arrangement of the compensating cylinder directly at the corners of the mounting frame also allows a sensitive manual dosing of the position compensation, without this being affected by frictional forces and kinematic inaccuracies of the power transmission elements in their leadership.
- a pneumatic cylinder in the form of an elastically resilient constant pressure cylinder instead of the elastically yielding, non-driven compensating cylinder. This is adjusted with its internal pressure on the system weight, so that the lifting system is in equilibrium. As a result of the constant, path-independent pressure, the lifting system can be manually raised or lowered while maintaining the balance of forces.
- a corresponding control and a drive for the constant pressure cylinder can be provided.
- the power transmission element is a cable and in particular a steel cable.
- the ropes are also yielding transversely to their longitudinal axis, so that this alone, at least in the horizontal direction readily a compensation of position tolerances is manually possible.
- the force transmission element is a scissor lattice. The kinematics of the scissor lattice is permanent and reproducible an exact parallel guidance of the mounting frame safely.
- the arrangement according to the invention can be used in almost any lifting systems which have gripping means or other assembly or production means.
- the lifting system according to the invention is preferably used in applications in which the mounting frame comprises an assembly jig.
- the benefits of the invention come into play particularly: Without the user has to carry the weight of the mounting frame or the jig, he can manually with little effort and high precision to press the assembly jig in the desired position corrective.
- Fig. 1 shows a perspective view of an embodiment of a hoist 1 as part of a lifting system according to the invention for a mounting device.
- the hoist 1 comprises a rigid frame 6 welded from steel profiles and intended for ceiling mounting in an assembly hall.
- at least two power transmission elements 3 are provided, for example, after Fig. 4 can be formed as a safety gate 8 and are executed in the embodiment shown as ropes, especially as steel cables.
- ropes especially as steel cables.
- At least three power transmission elements 3 are provided.
- a total of four power transmission elements 3 are arranged at a distance from each other.
- the four power transmission elements 3 are located at vertices of a horizontal surface. This will create an in Fig. 2 shown, described in more detail below mounting frame 2, which is suspended from the power transmission elements 3, fixed in position with respect to its spatial angular orientation.
- Fig. 2 shows a perspective view of an embodiment of a mounting frame 2, which with the four power transmission elements 3 on the hoist 1 after Fig. 1 is suspended.
- the mounting frame 2 is designed as a welded or bolted tubular steel frame and has four a corner spanning vertices 7. At the corners 7 one end of the associated power transmission element 3 is attached.
- a pneumatic cylinder 4 is assigned.
- the two pneumatic cylinders 4 are designed as lifting cylinders for driving the associated power transmission elements 3.
- they have a cylinder 17, in which a piston, not shown, is guided in a previously known manner with a piston rod, also not shown.
- a lifting member 18 is arranged, which is under the action of pneumatic pressure in the cylinder 17 and retractable.
- the lifting part 18 carries two pulleys 19.
- Two further pulleys 19 are arranged at the base of the cylinder 17. It can also be a different, especially larger number of pulleys 19 may be provided.
- the pulleys 19 are wrapped in pairs of the trained as a rope power transmission element 3, which is the output side of the pulley 19 via pulleys 10 vertically downwards and parallel to the direction of gravity directed to the associated vertices 7 of the mounting frame 2.
- the two designed as a lifting cylinder pneumatic cylinder 4 are lying in the flat formed frame 6 of the hoist 1, resulting in the interaction with the pulleys 10 results in a flat design of the hoist 1.
- both pneumatic cylinders 4 run exactly the same during operation, so that all four force transmission elements 3 perform the exact same stroke movement.
- the mounting frame 2 is raised or lowered in the correct position.
- the term selected here in exact position means that a parallel, angle error-free lifting or lowering takes place.
- FIG. 2 The representation after Fig. 2 It can also be seen that a total of four pins 11 are provided on the mounting frame 2, which each a hook 12 on the frame 6 of the hoist 1 after Fig. 1 assigned.
- the mounting frame 2 is in Fig. 2 with respect to its vertical axis relative to the hoist 1 Fig. 1 drawn rotated by 90 °. In a corresponding orientation can each hook 12 engage behind the associated pin 11. It turns a rest position of the mounting frame 2, in the force transmission elements 3 and the pneumatic cylinder 4 are force-free.
- Fig. 3 shows in a side view the lifting system according to the invention with the hoist 1 after Fig. 1 and one opposite to the execution Fig. 2 geometrically slightly modified mounting frame 2.
- the hoist 1 is fixed with steel beams 13 under a building ceiling 16.
- rollers 14 are provided by means of which the hoist 1 can be moved horizontally on the steel beams 13.
- the mounting frame 2 comprises an assembly jig 9 exemplarily for the setting of welds, holes or the like on a vehicle body 15 which is moved on a production line not shown in detail to the mounting location shown here.
- the assembly jig 9, not shown, may be formed by the mounting frame 2 itself or as an individual part of a mounting frame 2, for example Fig. 2 to be assembled.
- the mounting frame 2 can be raised and lowered by means of the power transmission elements 3 designed as cables and the pneumatic cylinders 4 designed as lifting cylinders, connected in series therewith.
- the pneumatic cylinder 4 are designed as a smooth running cylinder. Due to the pneumatic compliance the associated pneumatic cylinder 4 in conjunction with their ease of running are the respective side of the mounting frame 2 in the vertical direction, whereby the position tolerances can be compensated.
- the flexibility of the two pneumatic cylinders 4 only allows a slight tilting of the mounting frame 2 in one plane, namely about an axis perpendicular to the plane of the drawing Fig. 3 stands.
- Additional degrees of freedom of elastic compliance and resulting tolerance compensation are generated by further pneumatic cylinders 5, which in Fig. 2 are shown.
- These pneumatic cylinders 5 are formed as elastically resilient, non-driven compensating cylinder and connected in series with each of the four power transmission elements.
- designed as a balance cylinder pneumatic cylinder 5 are attached to each one of the four vertices 7 of the mounting frame 2 and disposed between the vertices 7 and the associated ends of the power transmission elements 3 or mechanically connected in series.
- Their flexibility based on pneumatic compressibility allows according to the above-described principle any spatial tilting of the mounting frame 2 or a translational, vertical lowering of the mounting frame 2, whereby almost any positional tolerances of the mounting frame 2 relative to the vehicle body 15 (Fig. Fig. 3 ) can be compensated.
- Fig. 4 shows still in a front view of a variant of the arrangement Fig. 3 , in which the force transmission elements 3 are formed as a scissors grid 8. There are a total of two scissors lattice 8 are provided, which are driven by a respective pneumatic cylinder 4.
- these two power transmission elements 3 designed as a safety lattice 3 it is advantageous for them to be fitted with at least one pneumatic cylinder 5 designed as a compensation cylinder Fig. 2 to connect in series.
- two pneumatic cylinders 5 ( Fig. 2 ) associated with each one of the two scissor lattice 8, wherein a respective pneumatic cylinder 5 ( Fig.
Abstract
Description
In der industriellen Fertigung, insbesondere im Kraftfahrzeugbau werden Montageeinrichtungen an Montagebändern eingesetzt, die beispielsweise Greifmittel oder Lehren zum Setzen von Schweißpunkten, Bohrungen oder dergleichen umfassen. Derartige Montagemittel können je nach Größe ein Gesamtgewicht aufweisen, das für eine rein manuelle Handhabung zu groß ist. Das Gesamtgewicht von Lehren zur Bearbeitung von Karosserieteilen kann 100 kg überschreiten, so dass für ihre Handhabung ein Hebesystem erforderlich ist.In industrial manufacturing, in particular in motor vehicle assembly devices are used on assembly lines, for example, include gripping means or gauges for setting welds, holes or the like. Such mounting means may have a total weight depending on the size, which is too large for a purely manual handling. The total weight of car bodywork gauges may exceed 100 kg, requiring a lifting system to handle them.
Am Beispiel einer solchen Lehre wird deutlich, dass ein lagegenaues Absenken der Lehre auf das zu bearbeitende Bauteil erforderlich ist. In vorbekannter Bauform sind hierzu Seilzüge vorgesehen, an deren einem Ende ein Montagegerüst mit der Lehre aufgehängt ist, und an deren gegenüberliegendem Ende Ausgleichsgewichte angeordnet sind. Die einzelnen Seilzüge sind derart miteinander gekoppelt, dass eine Auf- und Abbewegung möglich ist, ohne dass sich die Lehre räumlich verkantet. Die Ausgleichsgewichte erlauben es, das Montagegerüst mit der Lehre manuell anzuheben oder zu senken. Die Kopplung der Seilzüge untereinander führt dazu, dass diese Hub- oder Absenkbewegung ausschließlich parallel erfolgt. Die räumliche Winkellage der Lehre gegenüber den auf dem Montageband heranrollenden Karosserieteilen wird fest eingestellt, so dass eine präzise Ausrichtung der Lehre gegenüber den Karosserieteilen mit Ausnahme der vom Benutzer einstellbaren Hubhöhe vorgegeben ist. Sobald das zu bearbeitende Karosserieteil in seiner Montageposition angekommen ist, senkt der Benutzer das Montagegerüst mittels des Hebezeuges in die vorgesehene Position ab. Daran anschließend werden die erforderlichen Arbeiten wie das Setzen von Schweißpunkten, Bohrungen oder dergleichen durchgeführt.The example of such a teaching is clear that a precise position lowering of the gauge on the component to be machined is required. In previously known design cables are provided for this purpose, at one end of a mounting frame is suspended with the teaching, and at the opposite end balancing weights are arranged. The individual cables are coupled together in such a way that an up and down movement is possible without the doctrine spatially tilted. The balance weights allow the scaffold to be raised or lowered manually with the gauge. The coupling of the cables with each other causes them Lifting or lowering movement takes place only in parallel. The spatial angular position of the gauge with respect to the rolling on the assembly line body parts is fixed, so that a precise alignment of the gauge is predetermined with respect to the body parts with the exception of the user-adjustable lifting height. Once the body part to be machined has arrived in its mounting position, the user lowers the mounting frame by means of the hoist in the intended position. Subsequently, the required work such as the setting of welds, holes or the like are performed.
Die Erfahrung der Praxis zeigt jedoch, dass die voreingestellte Winkelausrichtung des Montagegerüstes nicht in jedem Fall mit der Lageausrichtung des zu bearbeitenden Bauteiles übereinstimmt. Die Bauteile selbst und ihre Positionierung gegenüber dem Montageband unterliegen Maßtoleranzen. Die miteinander gekoppelten Drahtseile sind in Längsrichtung im Wesentlichen starr. Infolge ihrer parallelen Kopplung ist eine Winkelanpassung des Montagegerüstes als Toleranzausgleich nicht oder nur eingeschränkt möglich.Experience has shown, however, that the preset angular orientation of the mounting frame does not always coincide with the positional orientation of the component to be machined. The components themselves and their positioning relative to the assembly line are subject to dimensional tolerances. The coupled wire ropes are substantially rigid in the longitudinal direction. As a result of their parallel coupling an angular adjustment of the mounting frame as tolerance compensation is not or only partially possible.
Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Hebesystem derart weiterzubilden, dass ein Ausgleich von Lagetoleranzen bei einfacher Handhabung möglich ist.The invention has the object of developing a generic lifting system such that a compensation of positional tolerances with ease of use is possible.
Diese Aufgabe wird durch ein Hebesystem mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a lifting system with the features of claim 1.
Es wird ein Hebesystem vorgeschlagen, bei dem mindestens ein Kraftübertragungselement mit einem Pneumatikzylinder in Reihe geschaltet ist. Der Kolben im Pneumatikzylinder ist gegen die Kraft von anliegendem Gasdruck beweglich. Infolge der Kompressibilität der Gasfüllung im Pneumatikzylinder stellt sich eine gewisse Elastizität ein. Diese Elastizität überträgt sich auf das zugeordnete Kraftübertragungselement infolge der Reihenschaltung. Der Benutzer kann das Montagegerüst in die vorgesehene Bearbeitungsposition lagegenau absenken. Ein Toleranzausgleich kann manuell dadurch herbeigeführt werden, dass der Benutzer von Hand Kraft auf eine der Ecken des Montagegerüstes ausübt. Infolge der pneumatischen Elastizität des zugeordneten Pneumatikzylinders gibt diese Ecke trotz der im Übrigen im Wesentlichen starren Kraftübertragungselemente nach. Das Montagegerüst kann trotz seines hohen Gesamtgewichtes an das zu bearbeitende Bauteil unter Ausgleich von Lagetoleranzen angeschmiegt werden, während sein Gesamtgewicht im Übrigen von den Kraftübertragungselementen gehalten wird.It is proposed a lifting system in which at least one power transmission element is connected in series with a pneumatic cylinder. The piston in the pneumatic cylinder is movable against the force of applied gas pressure. Due to the compressibility of the gas filling in the pneumatic cylinder, a certain elasticity sets in. This elasticity is transmitted to the associated power transmission element as a result of the series connection. The user can lower the mounting frame in the intended processing position. Tolerance compensation can be accomplished manually by manually applying force to one of the corners of the mounting frame. As a result of the pneumatic elasticity of the associated pneumatic cylinder, this corner yields despite the otherwise substantially rigid force transmission elements. Despite its high total weight, the mounting frame can be nestled against the component to be machined while compensating for positional tolerances, while its total weight is otherwise held by the force transmission elements.
In vorteilhafter Weiterbildung ist der Pneumatikzylinder ein Hubzylinder für den Antrieb des zugeordneten Kraftübertragungselementes. Der Hubzylinder übernimmt hierbei eine Doppelfunktion: Bei entsprechender Ansteuerung kann das Montagegerüst angehoben oder abgesenkt werden, ohne dass hierzu Handkraft erforderlich ist. Nach Positionierung des Montagegerüstes erlaubt seine Elastizität dem Benutzer, durch manuelles Nachdrücken einen Ausgleich von Lagetoleranzen herbeizuführen.In an advantageous embodiment of the pneumatic cylinder is a lifting cylinder for driving the associated power transmission element. The lifting cylinder takes over a double function: With appropriate control, the mounting frame can be raised or lowered, without requiring manual force is required. After positioning the mounting frame its elasticity allows the user to bring about a compensation of positional tolerances by manual pressing.
In zweckmäßiger Weiterbildung sind insgesamt vier mit Abstand zueinander angeordnete Kraftübertragungselemente vorgesehen, von denen je zwei paarweise zusammengefasst und mit einem Pneumatikzylinder verbunden sind. Durch die vier Kraftübertragungselemente ist das Montagegerüst bezüglich seiner räumlichen Winkellage präzise ausgerichtet. Die miteinander gekoppelten Kraftübertragungselemente stellen sicher, dass das Montagegerüst parallel unter Beibehaltung seiner vorgesehenen räumlichen Winkellage angehoben bzw. abgesenkt wird. Die Anordnung von insgesamt zwei als Hubzylinder ausgebildeten Pneumatikzylindern ermöglicht dem Benutzer, das dem jeweiligen Pneumatikzylinder zugeordnete Ende des Montagegerüstes unabhängig vom gegenüberliegenden Ende elastisch nachgiebig einzusetzen, um einen Lagetoleranzausgleich herbeizuführen.In an expedient development, a total of four force transmission elements arranged at a distance from each other are provided, two of which are combined in pairs and connected to a pneumatic cylinder. Due to the four power transmission elements, the mounting frame is precisely aligned with respect to its spatial angular position. The mutually coupled force transmission elements ensure that the mounting frame is raised or lowered in parallel while maintaining its intended spatial angular position. The arrangement of a total of two designed as a lifting cylinder pneumatic cylinders allows the user to use the respective pneumatic cylinder associated end of the mounting frame, regardless of the opposite end elastically yielding to bring about a position tolerance compensation.
In zweckmäßiger Weiterbildung ist der mindestens eine als Hubzylinder ausgebildete Pneumatikzylinder liegend in einem flachen Rahmen des Hebezeuges angeordnet. Rahmen und Pneumatikzylinder erfordern nur einen geringe Bauhöhe, so dass eine Deckenmontage oberhalb des Fertigungsortes selbst bei niedrigen Raumhöhen möglich ist.In an expedient development, the at least one pneumatic cylinder designed as a lifting cylinder is arranged lying in a flat frame of the hoist. Frame and pneumatic cylinders require only a small height, so that a ceiling mounting above the production site is possible even at low room heights.
In einer bevorzugten Ausführungsform ist der Pneumatikzylinder ein elastisch nachgiebiger, nicht angetriebener Ausgleichszylinder. Vorteilhaft ist dabei mit jedem Kraftübertragungselement mindestens ein Ausgleichszylinder in Reihe geschaltet. Insbesondere greifen die Kraftübertragungselemente an vier Eckpunkten des Montagegerüstes an, wobei an jedem Eckpunkt je ein Ausgleichszylinder angeordnet ist. Hierdurch kann der Benutzer einen Ausgleich von Lagetoleranzen in allen räumlichen Freiheitsgraden herbeiführen. Dies kann insbesondere ohne Betätigung der Hubzylinder geschehen. Die Anordnung der Ausgleichszylinder unmittelbar an den Ecken des Montagegerüstes ermöglicht zudem eine feinfühlige manuelle Dosierung des Lageausgleichs, ohne dass diese durch Reibkräfte und kinematische Ungenauigkeiten der Kraftübertragungselemente in ihrer Führung beeinträchtigt wird.In a preferred embodiment, the pneumatic cylinder is an elastically resilient, non-driven compensating cylinder. Advantageously, at least one compensating cylinder is connected in series with each force transmission element. In particular, the power transmission elements engage at four corners of the mounting frame, wherein at each vertex each a compensating cylinder is arranged. This allows the user to compensate for positional tolerances in all spatial degrees of freedom. This can be done in particular without actuation of the lifting cylinder. The arrangement of the compensating cylinder directly at the corners of the mounting frame also allows a sensitive manual dosing of the position compensation, without this being affected by frictional forces and kinematic inaccuracies of the power transmission elements in their leadership.
Alternativ kann es zweckmäßig sein, anstelle des elastisch nachgiebigen, nicht angetriebenen Ausgleichszylinders einen Pneumatikzylinder in Form eines elastisch nachgiebigen Konstantdruckzylinders vorzusehen. Dieser wird mit seinem Innendruck auf das Systemgewicht eingestellt, so dass das Hebesystem im Kräftegleichgewicht ist. In Folge des konstanten, wegunabhängigen Druckes kann das Hebesystem unter Beibehaltung des Kräftegleichgewichtes manuell angehoben oder abgesenkt werden. Zur Einstellung und Aufrechterhaltung des konstanten, wegunabhängigen Druckes können optional eine entsprechende Steuerung und auch ein Antrieb für den Konstantdruckzylinder vorgesehen sein.Alternatively, it may be appropriate to provide a pneumatic cylinder in the form of an elastically resilient constant pressure cylinder instead of the elastically yielding, non-driven compensating cylinder. This is adjusted with its internal pressure on the system weight, so that the lifting system is in equilibrium. As a result of the constant, path-independent pressure, the lifting system can be manually raised or lowered while maintaining the balance of forces. To set and maintain the constant, path-independent pressure optionally a corresponding control and a drive for the constant pressure cylinder can be provided.
In einer bevorzugten Ausführungsform ist das Kraftübertragungselement ein Seil und insbesondere ein Stahlseil. In Verbindung mit Umlenkrollen lassen sich damit platzsparende, hochbelastbare Hebesysteme aufbauen. Die Seile sind darüber hinaus quer zu ihrer Längsachse nachgiebig, so dass allein hierdurch zumindest in horizontaler Richtung ohne weiteres ein Ausgleich von Lagetoleranzen manuell möglich ist. In zweckmäßiger Alternative ist das Kraftübertragungselement ein Scherengitter. Die Kinematik des Scherengitters stellt dauerhaft und reproduzierbar eine exakte Parallelführung des Montagegerüstes sicher.In a preferred embodiment, the power transmission element is a cable and in particular a steel cable. In conjunction with pulleys, space-saving, heavy duty lifting systems can be built. The ropes are also yielding transversely to their longitudinal axis, so that this alone, at least in the horizontal direction readily a compensation of position tolerances is manually possible. In an expedient alternative, the force transmission element is a scissor lattice. The kinematics of the scissor lattice is permanent and reproducible an exact parallel guidance of the mounting frame safely.
Die erfindungsgemäße Anordnung kann in nahezu beliebigen Hebesystemen eingesetzt werden, die Greifmittel oder andere Montage- bzw. Fertigungsmittel aufweisen. Bevorzugt wird das erfindungsgemäße Hebesystem bei Anwendungsfällen eingesetzt, in denen das Montagegerüst eine Montagelehre umfasst. Hierbei kommen die erfindungsgemäßen Vorteile besonders zum Tragen: Ohne dass der Benutzer das Eigengewicht des Montagegerüstes bzw. der Montagelehre tragen muss, kann er manuell mit geringem Kraftaufwand und hoher Präzision die Montagelehre in die gewünschte Position korrigierend nachdrücken.The arrangement according to the invention can be used in almost any lifting systems which have gripping means or other assembly or production means. The lifting system according to the invention is preferably used in applications in which the mounting frame comprises an assembly jig. Here, the benefits of the invention come into play particularly: Without the user has to carry the weight of the mounting frame or the jig, he can manually with little effort and high precision to press the assembly jig in the desired position corrective.
Ausführungsbeispiele der Erfindung sind im Folgenden anhand der Zeichnung näher beschrieben. Es zeigen:
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Fig. 1 eine perspektivische Darstellung eines Hebezeuges des erfindungsgemäßen Hebesystems mit Einzelheiten der als Hubzylinder ausgebildeten Pneumatikzylinder und davon angetriebenen Seilen; -
Fig. 2 in perspektivischer Ansicht ein mit zusätzlichen pneumatischen Ausgleichszylindern versehenes Montagegerüst, welches zum Anheben bzw. lagegenauen Absenken durch das Hebezeug nachFig. 1 vorgesehen ist; -
Fig. 3 in Seitenansicht das Hebesystem nach denFig. 1 und 2 im beispielartigen Einsatz bei der Karosseriefertigung; -
Fig. 4 in Frontansicht eine Variante der Anordnung nachFig. 3 mit Kraftübertragungselementen in Form von Scherengittern.
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Fig. 1 a perspective view of a hoist of the lifting system according to the invention with details of the lifting cylinder designed as a pneumatic cylinder and driven by ropes; -
Fig. 2 in a perspective view provided with additional pneumatic compensating cylinders mounting frame, which for lifting or positionally accurate lowering by the hoist afterFig. 1 is provided; -
Fig. 3 in side view the lifting system after theFig. 1 and 2 in exemplary use in the body production; -
Fig. 4 front view of a variant of the arrangement according toFig. 3 with power transmission elements in the form of scissor lattices.
Unter gleichzeitigem Bezug auf die
Bei entsprechender Druckbeaufschlagung des Pneumatikzylinders 4 wird das Hubteil 18 in Richtung eines Pfeiles 20 bewegt, wobei sich der Abstand der Seilrollen 19 zueinander vergrößert. Die als Seile ausgebildeten Kraftübertragungselemente 3 werden hierdurch gespannt und in der Folge das Montagegerüst 2 angehoben. Die Betätigung eines Paares von Seilen durch den zugeordneten Pneumatikzylinder 4 in vorgenannter Weise führt dazu, dass beide Seile exakt parallel angehoben bzw. abgelassen werden. Über eine nicht dargestellte pneumatische, elektropneumatische oder mechanische Steuerung bzw. Kopplung laufen beide Pneumatikzylinder 4 im Betrieb exakt gleich, so dass alle vier Kraftübertragungselemente 3 die exakt gleiche Hubbewegung durchführen. Hierdurch wird das Montagegerüst 2 lagegenau angehoben bzw. abgesenkt. Der hier gewählte Begriff lagegenau bedeutet, dass ein paralleles, winkelfehlerfreies Anheben bzw. Absenken erfolgt.With appropriate pressurization of the
Der Darstellung nach
Beim parallelen Absenken des Montagegerüstes 2 auf die Fahrzeugkarosserie 15 kann es zu leichten Lagetoleranzen zwischen dem Montagegerüst 2 und der Fahrzeugkarosserie 15 kommen. Diese Lagetoleranzen können dadurch ausgeglichen werden, dass der Benutzer wahlweise an einer der beiden in
Zusätzliche Freiheitsgrade einer elastischen Nachgiebigkeit und eines sich daraus ergebenden Toleranzausgleiches werden durch weitere Pneumatikzylinder 5 erzeugt, die in
Alternativ kann es zweckmäßig sein, anstelle der elastisch nachgiebigen, nicht angetriebenen Pneumatikzylinder 5 diese in Form von elastisch nachgiebigen Konstantdruckzylindern vorzusehen. Die Pneumatikzylinder 5 werden mit ihrem Innendruck auf das Systemgewicht eingestellt, so dass das Hebezeug 1 im Kräftegleichgewicht ist. In Folge des konstanten, wegunabhängigen Druckes in den Pneumatikzylindern 5 kann das Hebezeug unter Beibehaltung des Kräftegleichgewichtes manuell angehoben oder abgesenkt werden. Zur Einstellung und Aufrechterhaltung des konstanten, wegunabhängigen Druckes können optional eine entsprechende Steuerung und auch ein Antrieb für die Pneumatikzylinder 5 vorgesehen sein.Alternatively, it may be appropriate, instead of the elastically yielding, non-driven
Claims (11)
dadurch gekennzeichnet, dass mindestens ein Kraftübertragungselement (3) mit einem Pneumatikzylinder (4, 5) in Reihe geschaltet ist.Lifting system for a mounting device with a hoist (1) and with a mounting frame (2), which by means of the hoist (1) via at least two mutually spaced, coupled to each other power transmission elements (3) can be raised and lowered positionally accurate,
characterized in that at least one force transmission element (3) with a pneumatic cylinder (4, 5) is connected in series.
dadurch gekennzeichnet, dass der Pneumatikzylinder (4) ein Hubzylinder für den Antrieb des zugeordneten Kraftübertragungselementes (3) ist.Lifting system according to claim 1,
characterized in that the pneumatic cylinder (4) is a lifting cylinder for driving the associated power transmission element (3).
dadurch gekennzeichnet, dass insgesamt vier mit Abstand zueinander angeordnete Kraftübertragungselemente (3) vorgesehen sind, von denen je zwei paarweise zusammenfasst und paarweise mit einem Pneumatikzylinder (4) verbunden sind.Lifting system according to claim 2,
characterized in that a total of four mutually spaced force transmission elements (3) are provided, of which two pairs summarized and pairwise connected to a pneumatic cylinder (4).
dadurch gekennzeichnet, dass der mindestens eine, als Hubzylinder ausgebildete Pneumatikzylinder (4) liegend in einem flachen Rahmen (6) des Hebezeuges (1) angeordnet ist.Lifting system according to claim 2 or 3,
characterized in that the at least one, designed as a lifting cylinder pneumatic cylinder (4) lying in a flat frame (6) of the hoist (1) is arranged.
dadurch gekennzeichnet, dass der Pneumatikzylinder (5) ein elastisch nachgiebiger, nicht angetriebener Ausgleichszylinder ist.Lifting system according to one of claims 1 to 4,
characterized in that the pneumatic cylinder (5) is an elastically resilient, non-driven compensating cylinder.
dadurch gekennzeichnet, dass der Pneumatikzylinder (5) ein elastisch nachgiebiger Konstantdruckzylinder ist.Lifting system according to one of claims 1 to 4,
characterized in that the pneumatic cylinder (5) is an elastically yielding constant pressure cylinder.
dadurch gekennzeichnet, dass mit jedem Kraftübertragungselement (3) mindestens ein Ausgleichszylinder in Reihe geschaltet ist.Lifting system according to claim 5 or 6,
characterized in that with each force transmission element (3) at least one compensating cylinder is connected in series.
dadurch gekennzeichnet, dass die Kraftübertragungselemente (3) an vier Eckpunkten (7) des Montagegerüstes (2) angreifen, wobei an jedem Eckpunkt je ein Ausgleichszylinder angeordnet ist.Lifting system according to claim 7,
characterized in that the force transmission elements (3) at four corners (7) of the mounting frame (2) engage, wherein at each vertex each a compensating cylinder is arranged.
dadurch gekennzeichnet, dass das Kraftübertragungselement (3) ein Seil und insbesondere ein Stahlseil ist.Lifting system according to one of claims 1 to 8,
characterized in that the force transmission element (3) is a rope and in particular a steel cable.
dadurch gekennzeichnet, dass das Kraftübertragungselement (3) ein Scherengitter (8) ist.Lifting system according to one of claims 1 to 8,
characterized in that the force transmission element (3) is a scissor lattice (8).
dadurch gekennzeichnet, dass das Montagegerüst (2) eine Montagelehre (9) umfasst.Lifting system according to one of claims 1 to 10,
characterized in that the mounting frame (2) comprises an assembly jig (9).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200720018036 DE202007018036U1 (en) | 2007-12-24 | 2007-12-24 | Lifting system for a mounting device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2078692A2 true EP2078692A2 (en) | 2009-07-15 |
EP2078692A3 EP2078692A3 (en) | 2009-10-21 |
Family
ID=39155180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08021407A Withdrawn EP2078692A3 (en) | 2007-12-24 | 2008-12-10 | Lifting system for an assembly device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2078692A3 (en) |
DE (1) | DE202007018036U1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105293281A (en) * | 2015-11-18 | 2016-02-03 | 德马科起重机械有限公司 | Lightweight electric trolley of crane |
IT201600126670A1 (en) * | 2016-12-15 | 2018-06-15 | System Spa | Gripping means for a modular frame and implant comprise the gripping means. |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8316786B2 (en) | 2009-02-20 | 2012-11-27 | Par Systems, Inc. | Lift system for an elevator |
US9738499B2 (en) | 2011-04-27 | 2017-08-22 | Par Systems, Inc. | Lift assembly having a split trolley |
CN105236258A (en) * | 2015-11-18 | 2016-01-13 | 中国神华能源股份有限公司 | Lifting method |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1102586A (en) * | 1965-07-20 | 1968-02-07 | Cordwallis Engineering Co Ltd | Platform lifting devices |
DE2620902A1 (en) * | 1975-09-12 | 1977-07-21 | Nisso Sangyo Kk | Overhead platform lifting mechanism - has auxiliary rams thrusting upwards before main ones on pantographs take over |
DE3822291A1 (en) * | 1988-07-01 | 1990-01-04 | Babcock Werke Ag | Loading device for the introduction of modules into a reactor |
FR2675726A1 (en) * | 1991-04-25 | 1992-10-30 | Peugeot | Device for handling suspended loads |
US6550584B1 (en) * | 1998-10-15 | 2003-04-22 | Snap-On Deutschland Holding Gmbh | Vehicle lift of the type with four columns |
JP2003221189A (en) * | 2002-01-31 | 2003-08-05 | Yoshinobu Sato | Lifter for work |
EP1717171A2 (en) * | 2005-04-29 | 2006-11-02 | HOLZMA Plattenaufteiltechnik GmbH | Device for dividing plates |
-
2007
- 2007-12-24 DE DE200720018036 patent/DE202007018036U1/en not_active Expired - Lifetime
-
2008
- 2008-12-10 EP EP08021407A patent/EP2078692A3/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1102586A (en) * | 1965-07-20 | 1968-02-07 | Cordwallis Engineering Co Ltd | Platform lifting devices |
DE2620902A1 (en) * | 1975-09-12 | 1977-07-21 | Nisso Sangyo Kk | Overhead platform lifting mechanism - has auxiliary rams thrusting upwards before main ones on pantographs take over |
DE3822291A1 (en) * | 1988-07-01 | 1990-01-04 | Babcock Werke Ag | Loading device for the introduction of modules into a reactor |
FR2675726A1 (en) * | 1991-04-25 | 1992-10-30 | Peugeot | Device for handling suspended loads |
US6550584B1 (en) * | 1998-10-15 | 2003-04-22 | Snap-On Deutschland Holding Gmbh | Vehicle lift of the type with four columns |
JP2003221189A (en) * | 2002-01-31 | 2003-08-05 | Yoshinobu Sato | Lifter for work |
EP1717171A2 (en) * | 2005-04-29 | 2006-11-02 | HOLZMA Plattenaufteiltechnik GmbH | Device for dividing plates |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105293281A (en) * | 2015-11-18 | 2016-02-03 | 德马科起重机械有限公司 | Lightweight electric trolley of crane |
IT201600126670A1 (en) * | 2016-12-15 | 2018-06-15 | System Spa | Gripping means for a modular frame and implant comprise the gripping means. |
Also Published As
Publication number | Publication date |
---|---|
DE202007018036U1 (en) | 2008-03-06 |
EP2078692A3 (en) | 2009-10-21 |
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