EP1336586A2 - Lifting cylinder arrangement for lifting platforms - Google Patents

Lifting cylinder arrangement for lifting platforms Download PDF

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Publication number
EP1336586A2
EP1336586A2 EP03002099A EP03002099A EP1336586A2 EP 1336586 A2 EP1336586 A2 EP 1336586A2 EP 03002099 A EP03002099 A EP 03002099A EP 03002099 A EP03002099 A EP 03002099A EP 1336586 A2 EP1336586 A2 EP 1336586A2
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EP
European Patent Office
Prior art keywords
guide tube
hubstempelanordnung
sliding
lifting
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03002099A
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German (de)
French (fr)
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EP1336586A3 (en
EP1336586B1 (en
Inventor
Hubert Wanner
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Maha Maschinenbau Haldenwang GmbH and Co KG
Maha GmbH and Co KG
Original Assignee
Maha Maschinenbau Haldenwang GmbH and Co KG
Maha GmbH and Co KG
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Application filed by Maha Maschinenbau Haldenwang GmbH and Co KG, Maha GmbH and Co KG filed Critical Maha Maschinenbau Haldenwang GmbH and Co KG
Publication of EP1336586A2 publication Critical patent/EP1336586A2/en
Publication of EP1336586A3 publication Critical patent/EP1336586A3/en
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Publication of EP1336586B1 publication Critical patent/EP1336586B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions

Definitions

  • the invention relates to a Hubstempelan extract for lifts with a raised and lowered dimensionally stable guide tube, on the upper end supporting elements for the device to be lifted, e.g. a motor vehicle, are attached, with a coupled to the guide tube Drive unit for its lifting and lowering movements and with a stationary guide sleeve whose sliding elements on the guide tube issue.
  • Such Hubstempelan isten are preferably in Vietnamese Hubstkovan extracts in single or multiple punch versions used.
  • Each stroke includes a dimensionally stable steel tube of round or even polygonal cross-section, in a mostly in Ground level arranged cuff is guided and by a suitable hoist, usually one positioned inside the pipe Hydraulic cylinder, vertical from a basic position at ground level is moved to a raised operating position.
  • a suitable hoist usually one positioned inside the pipe Hydraulic cylinder, vertical from a basic position at ground level is moved to a raised operating position.
  • On the top End of this guide tube is a support structure for the mounted motor vehicle fastened, the flat ramps, pivotable telescopic arms with end support pieces od.
  • the object of the invention is a generic Hubstkovan inch to create, their manufacturing costs and costs compared known arrangements with at least the same operating characteristics are reduced.
  • the sliding coating of the PTFE-containing plastic material on the steel guide tube it is appropriate to the surface of Carefully clean the guide tube and insert e.g. by sandblasting roughen before the sliding coating e.g. in the form of a liquid film is applied to the pipe surface.
  • the layer thickness The cured sliding coating is then about 10 to 50 microns.
  • the PTFE material will be in the fine pits the roughened pipe surface, what the Reinforced long-term adhesion of the sliding coating on the guide tube.
  • the main advantages of the Hubstempelan extract invention lie in the excellent sliding properties and the high wear resistance of the sliding surface pairings.
  • To achieve optimum sliding properties are made of special sliding from relative hard high molecular weight plastic such as hard polyethylene (e.g. PE1000), which have a sufficiently high strength and do not damage the PTFE-containing sliding surface of the guide tube. Due to the increased temperature and also pressure stresses PTFE components are incorporated into the fine pits and molecular ones Intermediate spaces of the roughened pipe surface firmly embedded, whereby durable sliding and emergency running properties as well be achieved when a large part of the friction lining is through the movements of the guide tube rubbed against the sliding elements Has.
  • PE1000 hard polyethylene
  • the drawing shows a schematic axial section of the upper part a Hubstkovs 1, a vertical guide tube 2 from here square cross-section and one inside the coaxial built-in piston-cylinder unit 3 contains as a lifting unit.
  • the Piston-cylinder unit 3 has one on a - not shown - lower base fixed fixed piston 4 and a vertical on the piston 4 displaceable cylinder housing 5, the upper end is set in a thick-walled plate member 6, with the end part of the guide tube 2 is firmly connected.
  • a special treatment e.g. by sandblasting, roughened from any contamination-free outer surface of the guide tube 2 is durable and strong a low-friction and abrasion-resistant sliding coating 7 arranged adherently from a PTFE-containing plastic material.
  • a PTFE lubricating film is applied to this surface e.g. applied by spraying and by a preferably in cured oven heat treatment of 230 ° C.
  • the lifting piston described above is in a stationary Guide sleeve 10 out, in the illustrated embodiment with the square guide tube 2 either two or four diametrically opposed dimensionally stable plates 11 has.
  • These plates 11 are at the bottom of a supporting base plate 12 permanently e.g. fixed by welding, which forms part of in the ground laid support structure of the lift represents.
  • in the upper end portion of each plate 11 is axially between the bottom plate 12th and a welded holding web 13 a pressure plate 14 and an inside plate-shaped sliding member 15 is fixed, the inner contact surface with the sliding coating 7 on the outer surface of the Guide tube 2 forms a sliding surface pairing.
  • Embodiment with square guide tube 2 are preferably eight identical plate-shaped sliding elements 15 - for each tube side two sliding elements 15 - provided, each from an optionally filled with hard polyethylene material.
  • each plate 11 At the lower end of each plate 11 are a lower holding web 16th and a bottom reinforcing collar 17 for stabilizing the Guide sleeve attached, which is used to fix a lower Pressure plate 18 and two plate-shaped sliding elements 19th serve.
  • the lower sliding elements 19 are made of the same Material as the upper sliding elements 15 and are like these respectively arranged in pairs on each tube side.
  • upper and lower screws 20, 21, on the associated pressure plate 14, 18 and through this on the Sliders 15, 19 can exert a defined pressure.
  • the sliding elements 15, 19 do not consist entirely of the plastic material, but only with such a coating of suitable Be provided wall thickness.
  • the positioning and fixation these sliding elements in the guide sleeve containing the pipe section can also be done in other appropriate ways.
  • the guide tubes can be almost any Cross-section, polygonal, oval or circular, have and also off another suitable sufficiently rigid and sustainable Material consist of steel.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Types And Forms Of Lifts (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Actuator (AREA)
  • Supports For Pipes And Cables (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The ram arrangement (1) for lifting platforms comprises a guide pipe (2) which is provided with a low-friction, wear resistant coating of plastic material containing PTFE.

Description

Die Erfindung betrifft eine Hubstempelanordnung für Hebebühnen mit einem heb- und senkbaren formsteifen Führungsrohr, auf dessen oberem Ende Tragelemente für die zu liftende Vorrichtung, z.B. ein Kfz, befestigt sind, mit einem mit dem Führungsrohr gekoppelten Antriebsaggregat für dessen Hub- und Senkbewegungen und mit einer ortsfesten Führungsmanschette, deren Gleitelemente am Führungsrohr anliegen.The invention relates to a Hubstempelanordnung for lifts with a raised and lowered dimensionally stable guide tube, on the upper end supporting elements for the device to be lifted, e.g. a motor vehicle, are attached, with a coupled to the guide tube Drive unit for its lifting and lowering movements and with a stationary guide sleeve whose sliding elements on the guide tube issue.

Derartige Hubstempelanordnungen werden vorzugsweise in unterflurigen Kfz-Hebebühnen in Ein- oder Mehr-Stempelausführungen eingesetzt. Jeder Hubstempel enthält ein formsteifes Stahlrohr von rundem oder auch mehreckigem Querschnitt, das in einer meist im Bodenniveau angeordneten Manschette geführt ist und von einem geeigneten Hebezeug, meist einem im Rohrinneren positionierten Hydraulikzylinder, vertikal aus einer Grundstellung im Bodenniveau in eine angehobene Betriebsstellung bewegt wird. Auf dem oberen Ende dieses Führungsrohrs ist eine Auflagerkonstruktion für das anzuhebende Kraftfahrzeug befestigt, die flache Auffahrträger, schwenkbare Teleskoparme mit endseitigen Tragstücken od. dgl., aufweisen kann. Bei derartigen Hubstempelanordnungen sind die mit den Gleitkörpern in den Manschetten zusammenwirkenden äußeren Gleitflächen der Führungsstempel hartverchromt, um die erforderlichen Gleiteigenschaften auch bei mehrjährigen Betriebszeiten aufrechtzuerhalten. Damit die notwendige dauerhafte Haftung der Chromschicht erzielt und Verschleißerscheinungen an den Gleitflächen verhindert werden können, werden die Außenflächen der Führungsstempel zuerst mit einer dünnen Metallschicht aus insbesondere Ni versehen, bevor die Hartchromschicht durch bekannte Maßnahmen aufgebracht wird. Eine derartige Beschichtung ist technisch aufwendig und kostspielig.Such Hubstempelanordnungen are preferably in unterflurigen Vehicle lifts in single or multiple punch versions used. Each stroke includes a dimensionally stable steel tube of round or even polygonal cross-section, in a mostly in Ground level arranged cuff is guided and by a suitable hoist, usually one positioned inside the pipe Hydraulic cylinder, vertical from a basic position at ground level is moved to a raised operating position. On the top End of this guide tube is a support structure for the mounted motor vehicle fastened, the flat ramps, pivotable telescopic arms with end support pieces od. Like., can have. In such Hubstempelanordnungen are with the sliding bodies in the collars cooperating outer Sliding surfaces of the guide punch hard chromed to the required Sliding properties even with multi-year operating times maintain. Thus the necessary permanent adhesion achieved the chrome layer and wear on the Sliding surfaces can be prevented, the outer surfaces the guide punch first with a thin metal layer in particular Ni provided before the hard chrome layer by known Measures is applied. Such a coating is technically complex and expensive.

Aufgabe der Erfindung ist es, eine gattungsgemäße Hubstempelanordnung zu schaffen, deren Herstellungsaufwand und -kosten gegenüber bekannten Anordnungen bei zumindest gleichen Betriebseigenschaften vermindert sind.The object of the invention is a generic Hubstempelanordnung to create, their manufacturing costs and costs compared known arrangements with at least the same operating characteristics are reduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Führungsrohr mit einem reibungsarmen und abriebfesten harten Gleitbelag aus einem PTFE-haltigen Kunststoffmaterial festhaftend beschichtet ist.This object is achieved in that the guide tube with a low-friction and abrasion-resistant hard sliding surface made of a PTFE-containing plastic material adherently coated is.

In der Praxis hat sich gezeigt, daß ein nur wenige Hundertstel Millimeter dicker Gleitbelag aus einem harten PTFE-haltigen Kunststoffmaterial gegenüber den bekannten verchromten Führungsrohren nicht nur wesentlich kostengünstiger hergestellt werden kann, sondern daß aufgrund der bekannten hervorragenden Gleiteigenschaften von PTFE auch geringere Reibungswerte erreichbar sind, und zwar auch nach einer außerordentlich hohen Anzahl an Hub- und Senkbewegungen des Führungsrohrs unter Last, was ausreichend langen Betriebszeiten entspricht.In practice it has been shown that only a few hundredths of a millimeter Thick sliding lining made of a hard PTFE-containing plastic material compared to the known chrome-plated guide tubes not only can be made much cheaper, but that due to the known excellent sliding properties PTFE also lower friction values can be achieved, and Although after an extremely high number of lifting and Lowering movements of the guide tube under load, which is sufficient long operating times.

Ein extrem niedriger Verschleiß der Gleitflächenpaarung kann erreicht werden, wenn die in der ortsfesten Führungsmanschette eingebauten Gleitelemente aus einem formsteifen harten Kunststoffmaterial insbesondere auf Polyethylen- oder Polyamidbasis bestehen.An extremely low wear of the sliding surface pairing can be achieved when installed in the stationary guide sleeve Sliding elements made of a dimensionally stable hard plastic material in particular on a polyethylene or polyamide basis.

Zum Erhalt der hochfesten, dauerhaften und durchgehenden Verbindung des Gleitbelags aus dem PTFE-haltigen Kunststoffmaterial auf dem Stahlführungsrohr ist es zweckmäßig, die Oberfläche des Führungsrohrs sorgfältig zu reinigen und z.B. durch Sandstrahlen aufzurauhen, bevor der Gleitbelag z.B. in Form eines Flüssigfilms auf die Rohroberfläche aufgebracht wird. Um den Gleitbelag selbst zu verfestigen und auch die Bindung zum aufgerauhten Untergrund zu fördern, wird das aufgesprühte Beschichtungsmaterial zusammen mit den angrenzenden Stahlbereichen einer Wärmebehandlung in einem Ofen bei ca. 200 bis 250 °C ausgesetzt. Die Schichtstärke des ausgehärteten Gleitbelages beträgt danach etwa 10 bis 50 µm. Bei Betriebsbelastungen wird das PTFE-Material in die feinen Vertiefungen der aufgerauhten Rohroberfläche hineingewalkt, was die Langzeithaftung des Gleitbelages auf dem Führungsrohr verstärkt. To obtain the high-strength, durable and continuous connection the sliding coating of the PTFE-containing plastic material on the steel guide tube, it is appropriate to the surface of Carefully clean the guide tube and insert e.g. by sandblasting roughen before the sliding coating e.g. in the form of a liquid film is applied to the pipe surface. To the sliding coating itself to solidify and also the bond to the roughened surface to promote the sprayed coating material together with the adjacent steel areas of a heat treatment exposed in an oven at about 200 to 250 ° C. The layer thickness The cured sliding coating is then about 10 to 50 microns. At operating loads, the PTFE material will be in the fine pits the roughened pipe surface, what the Reinforced long-term adhesion of the sliding coating on the guide tube.

Die wesentlichen Vorteile der erfindungsgemäßen Hubstempelanordnung liegen in den hervorragenden Gleiteigenschaften und der hohen Verschleißfestigkeit der Gleitflächenpaarungen. Zur Erzielung optimaler Gleiteigenschaften werden spezielle Gleitstücke aus relativ hartem hochmolekularem Kunststoff, wie hartes Polyethylen (z.B. PE1000), verwendet, die eine ausreichend hohe Festigkeit haben und den PTFE-haltigen Gleitbelag des Führungsrohrs nicht verletzen. Durch die erhöhte Temperatur und auch Druckbeanspruchungen werden PTFE-Bestandteile in die feinen Vertiefungen und molekularen Zwischenräume der aufgerauhten Rohroberfläche fest eingelagert, wodurch dauerhafte Gleit- und Notlaufeigenschaften auch dann erreicht werden, wenn ein Großteil des Reibbelags sich durch die Bewegungen des Führungsrohrs an den Gleitelementen abgerieben hat.The main advantages of the Hubstempelanordnung invention lie in the excellent sliding properties and the high wear resistance of the sliding surface pairings. To achieve optimum sliding properties are made of special sliding from relative hard high molecular weight plastic such as hard polyethylene (e.g. PE1000), which have a sufficiently high strength and do not damage the PTFE-containing sliding surface of the guide tube. Due to the increased temperature and also pressure stresses PTFE components are incorporated into the fine pits and molecular ones Intermediate spaces of the roughened pipe surface firmly embedded, whereby durable sliding and emergency running properties as well be achieved when a large part of the friction lining is through the movements of the guide tube rubbed against the sliding elements Has.

Im folgenden wird ein Ausführungsbeispiel der erfindungsgemäßen Hubstempelanordnung anhand der schematischen Schnittzeichnung ausführlicher beschrieben.In the following an embodiment of the invention Hubstempelanordnung based on the schematic sectional drawing described in more detail.

Die Zeichnung zeigt im schematischen Axialschnitt den oberen Teil eines Hubstempels 1, der ein vertikales Führungsrohr 2 von hier quadratischem Querschnitt sowie eine in dessen Innerem koaxial eingebaute Kolben-Zylinder-Einheit 3 als Hubaggregat enthält. Die Kolben-Zylinder-Einheit 3 hat einen auf einer - nicht dargestellten - unteren Basis befestigten ortsfesten Kolben 4 und ein vertikal auf dem Kolben 4 verschiebbares Zylindergehäuse 5, dessen oberes Ende in einem dickwandigen Plattenelement 6 festgelegt ist, das mit dem Endteil des Führungsrohrs 2 fest verbunden ist. Auf der durch eine spezielle Behandlung, z.B. durch Sandstrahlen, aufgerauhten von jeglicher Verschmutzung freien Außenfläche des Führungsrohrs 2 ist dauerhaft und fest ein reibungsarmer und abriebfester Gleitbelag 7 aus einem PTFE-haltigen Kunststoffmaterial festhaftend angeordnet.The drawing shows a schematic axial section of the upper part a Hubstempels 1, a vertical guide tube 2 from here square cross-section and one inside the coaxial built-in piston-cylinder unit 3 contains as a lifting unit. The Piston-cylinder unit 3 has one on a - not shown - lower base fixed fixed piston 4 and a vertical on the piston 4 displaceable cylinder housing 5, the upper end is set in a thick-walled plate member 6, with the end part of the guide tube 2 is firmly connected. On the through a special treatment, e.g. by sandblasting, roughened from any contamination-free outer surface of the guide tube 2 is durable and strong a low-friction and abrasion-resistant sliding coating 7 arranged adherently from a PTFE-containing plastic material.

Zum Aufbringen dieses Gleitbelages wird die Außenfläche des Führungsrohrs sorgfältig gereinigt und entfettet sowie anschließend zum Aufrauhen sandgestrahlt. Unter Vermeidung jeglicher erneuter Verunreinigungen wird auf diese Oberfläche dann ein PTFE-Schmierfilm z.B. durch Aufsprühen aufgebracht und durch eine vorzugsweise in einem Ofen ausgeführte Wärmebehandlung von 230 °C ausgehärtet.To apply this sliding coating, the outer surface of the guide tube carefully cleaned and degreased and then added to Roughened sandblasted. Avoiding any re-contamination Then a PTFE lubricating film is applied to this surface e.g. applied by spraying and by a preferably in cured oven heat treatment of 230 ° C.

Der vorstehend beschriebene Hubstempel ist in einer ortsfesten Führungsmanschette 10 geführt, die beim dargestellten Ausführungsbeispiel mit dem Vierkant-Führungsrohr 2 entweder zwei oder vier diametral gegenüberliegende formsteife Platten 11 aufweist. Diese Platten 11 sind an der Unterseite einer tragfesten Bodenplatte 12 dauerhaft z.B. durch Schweißen befestigt, welche einen Teil der im Boden verlegten Tragkonstruktion der Hebebühne darstellt. Im oberen Endteil jeder Platte 11 ist axial zwischen der Bodenplatte 12 und einem angeschweißten Haltesteg 13 eine Druckplatte 14 und ein innenseitiges plattenförmiges Gleitelement 15 festgelegt, dessen innere Kontaktfläche mit dem Gleitbelag 7 auf der Außenfläche des Führungsrohrs 2 eine Gleitflächenpaarung bildet. Beim dargestellten Ausführungsbeispiel mit Vierkant-Führungsrohr 2 sind vorzugsweise acht gleiche plattenförmige Gleitelemente 15 - für jede Rohrseite zwei Gleitelemente 15 - vorgesehen, die jeweils aus einem ggf. mit Füllstoffen versehenen harten Polyethylen-Werkstoff bestehen.The lifting piston described above is in a stationary Guide sleeve 10 out, in the illustrated embodiment with the square guide tube 2 either two or four diametrically opposed dimensionally stable plates 11 has. These plates 11 are at the bottom of a supporting base plate 12 permanently e.g. fixed by welding, which forms part of in the ground laid support structure of the lift represents. in the upper end portion of each plate 11 is axially between the bottom plate 12th and a welded holding web 13 a pressure plate 14 and an inside plate-shaped sliding member 15 is fixed, the inner contact surface with the sliding coating 7 on the outer surface of the Guide tube 2 forms a sliding surface pairing. When presented Embodiment with square guide tube 2 are preferably eight identical plate-shaped sliding elements 15 - for each tube side two sliding elements 15 - provided, each from an optionally filled with hard polyethylene material.

Am unteren Endbereich jeder Platte 11 sind ein unterer Haltesteg 16 und ein unterster Verstärkungskragen 17 zur Stabilisierung der Führungsmanschette befestigt, die zur Fixierung einer unteren Druckplatte 18 sowie von zwei plattenförmigen Gleitelementen 19 dienen. Die unteren Gleitelemente 19 bestehen aus dem gleichen Material wie die oberen Gleitelemente 15 und sind wie diese jeweils paarweise an jeder Rohrseite angeordnet. Zur genauen Fixierung der unteren und oberen Gleitelemente 15 und 19 sowie zur Einstellung des Spalts zwischen dem Führungsrohr und den jeweiligen Gleitelementen 15, 19 sind obere und untere Schrauben 20, 21 vorgesehen, die auf die zugehörige Druckplatte 14, 18 und durch diese auf die Gleitelemente 15, 19 einen definierten Druck ausüben können.At the lower end of each plate 11 are a lower holding web 16th and a bottom reinforcing collar 17 for stabilizing the Guide sleeve attached, which is used to fix a lower Pressure plate 18 and two plate-shaped sliding elements 19th serve. The lower sliding elements 19 are made of the same Material as the upper sliding elements 15 and are like these respectively arranged in pairs on each tube side. For exact fixation of the lower and upper sliding elements 15 and 19 and for adjustment the gap between the guide tube and the respective sliding elements 15, 19 are provided upper and lower screws 20, 21, on the associated pressure plate 14, 18 and through this on the Sliders 15, 19 can exert a defined pressure.

Der Vollständigkeit halber sei noch darauf hingewiesen, daß auf der Oberseite des Führungsrohrs 2 die bei Hebebühnen üblichen Tragkonstruktionen für die anzuhebenden Vorrichtungen, insbesondere für verschiedenartige Fahrzeugtypen, montiert sind.For the sake of completeness, it should be noted that on the Top of the guide tube 2, the usual support for lifting platforms for the devices to be lifted, in particular for various vehicle types, are mounted.

Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt, sondern umfaßt auch verschiedene Varianten der vorstehend beschriebenen Einzelheiten. Beispielsweise können die Gleitelemente 15, 19 nicht durchgehend aus dem Kunststoffmaterial bestehen, sondern lediglich mit einer solchen Beschichtung von geeigneter Wandstärke versehen sein. Die Positionierung und Fixierung dieser Gleitelemente in der das Rohrstück enthaltenden Führungsmanschette kann auch auf andere geeignete Weise erfolgen. Darüber hinaus können die Führungsrohre einen nahezu beliebigen Querschnitt, mehreckig, oval oder kreisrund, haben und auch aus einem anderen geeigneten ausreichend steifen und tragfähigen Werkstoff als Stahl bestehen.The invention is not limited to the illustrated embodiment, but also includes various variants of the above described details. For example, the sliding elements 15, 19 do not consist entirely of the plastic material, but only with such a coating of suitable Be provided wall thickness. The positioning and fixation these sliding elements in the guide sleeve containing the pipe section can also be done in other appropriate ways. About that In addition, the guide tubes can be almost any Cross-section, polygonal, oval or circular, have and also off another suitable sufficiently rigid and sustainable Material consist of steel.

Claims (7)

Hubstempelanordnung für Hebebühnen mit einem heb- und senkbaren formsteifen Führungsrohr (2), auf dessen oberem Ende Tragelemente für z.B. ein Kfz befestigt sind, einer mit dem Führungsrohr (2) gekoppelten Antriebseinheit (3) für dessen Hub- und Senkbewegungen und einer ortsfesten Führungsmanschette (10), deren Gleitelemente (15, 19) am Führungsrohr (2) anliegen, dadurch gekennzeichnet, daß das Führungsrohr (2) mit einem reibungsarmen abriebfesten Gleitbelag (7) aus einem PTFE-haltigen Kunststoffmaterial festhaftend beschichtet ist. Hubstempelanordnung for lifts with a liftable and lowerable dimensionally stable guide tube (2), on the upper end of which support elements for eg a motor vehicle are fastened, a with the guide tube (2) coupled to the drive unit (3) for its lifting and lowering movements and a fixed guide sleeve (10) whose sliding elements (15, 19) rest against the guide tube (2), characterized in that the guide tube (2) is adhesively coated with a low-friction abrasion-resistant sliding coating (7) made of a PTFE-containing plastic material. Hubstempelanordnung nach Anspruch 1,
dadurch gekennzeichnet, daß
die Gleitelemente (15, 19) aus einem formfesten harten Material auf Polyamid- oder Polyethylenbasis bestehen.Hubstempelanordnung according to claim 1,
characterized in that
the sliding elements (15, 19) consist of a dimensionally stable hard material based on polyamide or polyethylene. Hubstempelanordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
das Führungsrohr (2) aus Stahl besteht, mit dessen gereinigter und aufgerauhter Oberfläche der Gleitbelag (7) nach einer Wärmebehandlung dauerhaft festhaftend verbunden ist. Hubstempelanordnung according to claim 1 or 2,
characterized in that
the guide tube (2) consists of steel, with its cleaned and roughened surface of the sliding coating (7) is permanently adhered to a heat treatment. Hubstempelanordnung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
der Gleitbelag (7) eine Schichtdicke von 10 bis 50 µm hat.Hubstempelanordnung according to any one of the preceding claims,
characterized in that
the sliding coating (7) has a layer thickness of 10 to 50 μm. Hubstempelanordnung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
das Führungsrohr (2) kreisrunden, ovalen oder mehreckigen Querschnitt hat.Hubstempelanordnung according to any one of the preceding claims,
characterized in that
the guide tube (2) has a circular, oval or polygonal cross-section. Hubstempelanordnung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die an der Führungsmanschette (10) innenseitig befestigten Gleitelemente (15, 19) bei Rundrohren ringförmig und bei Mehrkantrohren plattenförmig ausgebildet sind.Hubstempelanordnung according to any one of the preceding claims,
characterized in that
the on the guide sleeve (10) internally mounted sliding elements (15, 19) are circular in circular tubes and plate-shaped in polygonal tubes. Hubstempelanordnung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Antriebseinheit (3) mindestens eine innerhalb oder außerhalb des Führungsrohrs (2) angeordnete hydraulische Kolben-Zylinder-Einheit (4, 5) enthält, deren ortsfeste Kolbenstange (4) sich auf einer unteren Basis abstützt und deren heb- und senkbares Zylinderhäuse (5) mit dem oberen Ende des Führungsrohrs (2) über ein massives Plattenelement (6) fest verbunden ist.Hubstempelanordnung according to any one of the preceding claims,
characterized in that
the drive unit (3) contains at least one hydraulic piston-cylinder unit (4, 5) arranged inside or outside the guide tube (2), whose stationary piston rod (4) is supported on a lower base and whose raised and lowered cylinder housing (5 ) is fixedly connected to the upper end of the guide tube (2) via a solid plate member (6).
EP03002099A 2002-02-15 2003-01-30 Lifting cylinder arrangement for lifting platforms Expired - Lifetime EP1336586B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20202362U 2002-02-15
DE20202362U DE20202362U1 (en) 2002-02-15 2002-02-15 Lifting ram arrangement for lifting platforms

Publications (3)

Publication Number Publication Date
EP1336586A2 true EP1336586A2 (en) 2003-08-20
EP1336586A3 EP1336586A3 (en) 2004-01-07
EP1336586B1 EP1336586B1 (en) 2010-05-05

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EP03002099A Expired - Lifetime EP1336586B1 (en) 2002-02-15 2003-01-30 Lifting cylinder arrangement for lifting platforms

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US (1) US7028987B2 (en)
EP (1) EP1336586B1 (en)
AT (1) ATE466811T1 (en)
DE (2) DE20202362U1 (en)
DK (1) DK1336586T3 (en)
ES (1) ES2345769T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050990B4 (en) 2005-10-25 2010-02-11 Herrmann, Johannes Lifting ram for lifting platforms and lifting platform
CN102275593B (en) * 2010-06-11 2015-03-04 北京铁道工程机电技术研究所有限公司 Pit type train lifting jack of high-speed multiple unit
ES2582981B1 (en) * 2016-02-08 2017-06-21 Transports De Barcelona, S.A. Sliding for lifting horizontal structures.

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Also Published As

Publication number Publication date
ES2345769T3 (en) 2010-10-01
EP1336586A3 (en) 2004-01-07
DK1336586T3 (en) 2010-08-30
DE20202362U1 (en) 2002-04-18
DE50312680D1 (en) 2010-06-17
US7028987B2 (en) 2006-04-18
EP1336586B1 (en) 2010-05-05
US20030155561A1 (en) 2003-08-21
ATE466811T1 (en) 2010-05-15

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