EP1448900B1 - Clamping device and regulating unit - Google Patents

Clamping device and regulating unit Download PDF

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Publication number
EP1448900B1
EP1448900B1 EP02787823A EP02787823A EP1448900B1 EP 1448900 B1 EP1448900 B1 EP 1448900B1 EP 02787823 A EP02787823 A EP 02787823A EP 02787823 A EP02787823 A EP 02787823A EP 1448900 B1 EP1448900 B1 EP 1448900B1
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EP
European Patent Office
Prior art keywords
spring
clamping device
clamping
helical plate
plate spring
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP02787823A
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German (de)
French (fr)
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EP1448900A1 (en
Inventor
Herbert Busse
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Herbert Hanchen & Co Kg GmbH
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Herbert Hanchen & Co Kg GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads

Definitions

  • the present invention relates to a clamping device with the features of the preamble of claim 1 as well an adjusting device, in particular a working cylinder, with a piston rod.
  • Clamping devices for axially moving rods for example Piston rods of working cylinders or stationary Rods are known. Such a clamping device is described in DE 37 07 046 A1. Clamping devices of this Type are with respect to the pole to be clamped moving component or device connected, and the clamping force For example, by means of a clamping piston with inner cone and a clamping sleeve with outer cone generated. Because the height the clamping force depends directly on the height of the spring force is, are for high holding or clamping forces in the state the technology consistently uses spring assemblies made of disc springs, which, depending on the requirement, are arranged in alternating lines consist of one or more layered disc springs and are arranged coaxially.
  • the operation at high forces is as follows.
  • To solve the clamping sleeve of the rod is the tensioning piston with hydraulic pressure against the spring force of the spring device shifted, so that the clamping sleeve at its outer cone is no longer applied and the rod is thus free.
  • the clamping action i. to charge the Outer cone of the clamping sleeve, the hydraulic pressure is removed, so that the spring force of the spring device is effective can be.
  • a clamping device for an axially translational and / or rotationally moving rod a housing, a clamping sleeve axially fixed in the housing, a movable in the housing designed as a cylinder Tensioning piston and at least one piston in Direction of the clamping sleeve in the locking state biasing screw plate spring.
  • Screw disc springs per se are known from DE 29 16 446 A1 known. These are two upright and diagonal to the central axis wound coil springs, in the inverse Sense are screwed together so that after the screwed against each other inclined flat band the spring coils plate spring column is claimed.
  • the clamping device according to the invention with ertellerfedern has the great advantage that even with a spring break no suspension travel is lost and so the set Spring force remains virtually unchanged.
  • This attribute gives a clamping device in which the holding force produced by spring force, a high degree of functional reliability, so that, for example, the rules of Employers' liability insurance association for the use of spring-acting locking / holding devices for hydraulic presses and injection molding machines using helical disc fields are fulfilled.
  • an inventive invention Arrangement of several helical plate springs axially parallel the circumference of the bar to be clamped. With this arrangement is a required total spring force on a plurality of Split springs. This will make a use of springs with relatively small diameter also possible in applications, which require a high preload force.
  • This invention Arrangement makes it possible in the first place To use screw-spring springs for such applications, there screw spring springs manufacturing reasons as single springs only up to a size of approx. 50 mm rod diameter to be delivered. With this solution it is now possible, even very large spring-acting clamping devices to realize. These had to because of missing plate spring sizes previously operated hydraulically, but with what Reductions in the reliability were connected. Another aspect to increase the reliability is that in this multiple spring column arrangement the functional reliability even with total failure a spring column is guaranteed, since with appropriate Spring design the remaining spring columns for the necessary Holding power.
  • the at least one Screw disc spring guided by a bolt the only in the region of the ends of the spring, the helical spring leads to the inner diameter. This will cause the occurring Friction negligible small, since the guide only takes place at the spring ends.
  • the at least one helical spring spring coaxial with the arranged clamping bar.
  • clamping devices up to be designed a rod diameter of 50 mm maximum.
  • it turns out to vote the spring characteristic in relation to the required space as advantageous if in the tensioning piston and / or in a lid of Clamping devices Recesses for holding a or both of the ends of the helical spring are provided.
  • the at least one acts Screw disc spring directly on the clamping sleeve, whose Outside cone acts on an associated inner cone of the housing and their inside diameter is due to the reduced axial displacement in the locked state, resulting in a clamping of the moving rod.
  • FIG. 2 shows a clamping device as it stands the technique, in particular from DE 37 070 46 A1, known is.
  • the known clamping device 8 has a three-part Housing 9, in which a rod 10 by means of a clamping sleeve 11 is clamped. This clamping is done via a tensioning piston 12, by applying a coaxial arranged disc spring assemblies 13 with a biasing force is provided. The release of the clamping sleeve 11 takes place by means of a pressure medium supply to the tensioning piston 12, wherein the force of the biasing force exerted by the pressure means counteracts the spring package 13.
  • the disc spring package is thus both in the clamping as also in the release position under permanent pretension, i.e. all, the disc spring package forming disc springs are biased by the same amount, with the bias higher in the release position. Since the disc springs are connected in series, gives in a single stratification each spring on each full biasing force from the tensioning piston.
  • FIG. 1 shows a longitudinal section through a Clamping device according to the invention 1.
  • the inventive Clamping device 1 also consists of a three-part Housing 2, in which a rod 3 by means of a clamping sleeve 4th can be clamped. This clamping is done via a Tensioning piston 5, of several around the circumference of the rod. 3 axially parallel arranged fferentellerfedern acted upon is.
  • the axially parallel to the rod 3 arranged Screw disc springs 6 generate the necessary preload or clamping force for the clamping sleeve 4.
  • shims 7 are provided between the individual helical spring column and the tensioning piston 5 are introduced.
  • FIG. 1a shows a longitudinal section through an inventive device Clamping device, wherein on both sides of the longitudinal center line two different embodiments for the Arrangement and leadership of yentellerfederklalen shown are.
  • FIG. 1a left of the longitudinal center line Embodiment is in a housing wall or the housing shell forming tube 24 a recess 21 with provided in a circular section plan, in the helical plate springs 6 'protrude with a portion of its circumference.
  • a recess 21 with provided in a circular section plan, in the helical plate springs 6 'protrude with a portion of its circumference.
  • the use of Screw disc springs with larger diameter allows, whereby at the same size of the clamping device housing, i.e. same outer dimensions of the clamping device, the use of screw-spring springs with larger Diameter and thus the generation of a larger preload force becomes possible.
  • FIG. 3a A plan view of the described Embodiment with the recesses 21 with nikabitessförmigem Plan view is shown in Figure 3a.
  • FIG. 1a Another embodiment is shown in FIG. 1a on the right represented by the longitudinal center line.
  • this embodiment are in the clamping piston 5 and in a housing cover 20 of the clamping device indentations 22 provided in which the ends of the screw disc spring columns 6 " are included.
  • This will - again at the same External dimensions of the clamping device - the use of longer Screw plate springs 6 "allows to this embodiment is also in Figure 3a, right represented by the longitudinal center line.
  • the SSentellerfedern not on her inside diameter, but on her Outer diameter to lead.
  • this is the type of Leadership also feasible through two holes, each surrounded only one of the two spring ends 16 and 17 and the Apply outside diameter of the spring ends to the guide. These two holes may be, for example, the grooves 22 of Figure 1a act.
  • FIG. 6 shows a longitudinal section through an inventive device Clamping device in which a helical plate spring 19 arranged coaxially with the rod 3 to be clamped is.

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  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Springs (AREA)
  • Clamps And Clips (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Vehicle Body Suspensions (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

The invention relates to a clamping device for a rod which moves in an axial translatory or rotating manner. Said clamping device comprises a housing, a clamping sleeve which is axially fixed therein, a tensioning piston which can be displaced in the housing embodied as a cylinder, and a spring device for pre-tensioning the piston in the direction of the clamping sleeve in the locking state. Said spring device includes at least one helical plate spring which, in the event of a fracture, maintains the holding force and the dynamic course of the same. In one embodiment, the at least one helical plate spring is coaxially arranged in relation to the rod. In another embodiment, a plurality of helical plate springs are arranged on the circumference of the rod such that they are parallel with the axis thereof, for distribution of a pre-tensioning force acting on the spring device.

Description

Die vorliegende Erfindung betrifft eine Klemmvorrichtung mit den Merkmalen des Oberbegriffs des Anspruchs 1 sowie eine Stelleinrichtung, insbesondere einen Arbeitszylinder, mit einer Kolbenstange.The present invention relates to a clamping device with the features of the preamble of claim 1 as well an adjusting device, in particular a working cylinder, with a piston rod.

Klemmvorrichtungen für axial bewegte Stangen, beispielsweise Kolbenstangen von Arbeitszylindern oder auch ortsfeste Stangen, sind bekannt. Eine derartige Klemmvorrichtung ist in der DE 37 07 046 A1 beschrieben. Klemmvorrichtungen dieser Art sind bezüglich der zu klemmenden Stange mit einem bewegten Bauteil oder Gerät verbunden, und die Klemmkraft wird beispielsweise mittels eines Spannkolbens mit Innenkonus und einer Klemmhülse mit Außenkonus erzeugt. Da die Höhe der Klemmkraft direkt von der Höhe der Federkraft abhängig ist, werden für hohe Halte- bzw. Klemmkräfte im Stand der Technik durchweg Federpakete aus Tellerfedern verwendet, die je nach Erfordernis aus wechselsinnig aneinandergereihten ein- oder mehrfach geschichteten Tellerfedern bestehen und koaxial angeordnet sind.Clamping devices for axially moving rods, for example Piston rods of working cylinders or stationary Rods are known. Such a clamping device is described in DE 37 07 046 A1. Clamping devices of this Type are with respect to the pole to be clamped moving component or device connected, and the clamping force For example, by means of a clamping piston with inner cone and a clamping sleeve with outer cone generated. Because the height the clamping force depends directly on the height of the spring force is, are for high holding or clamping forces in the state the technology consistently uses spring assemblies made of disc springs, which, depending on the requirement, are arranged in alternating lines consist of one or more layered disc springs and are arranged coaxially.

Die Betriebsweise bei hohen Kräften ist wie folgt. Zum Lösen der Klemmhülse von der Stange wird der Spannkolben mit hydraulischem Druck gegen die Federkraft der Federeinrichtung verschoben, so daß die Klemmhülse an ihrem Außenkonus nicht mehr beaufschlagt ist und die Stange somit frei wird. Zum Einsetzen der Klemmwirkung, d.h. zum Beaufschlagen des Außenkonus der Klemmhülse, wird der hydraulische Druck entfernt, so daß die Federkraft der Federeinrichtung wirksam werden kann.The operation at high forces is as follows. To solve the clamping sleeve of the rod is the tensioning piston with hydraulic pressure against the spring force of the spring device shifted, so that the clamping sleeve at its outer cone is no longer applied and the rod is thus free. For employing the clamping action, i. to charge the Outer cone of the clamping sleeve, the hydraulic pressure is removed, so that the spring force of the spring device is effective can be.

Probleme bei diesen Klemmvorrichtungen ergeben sich insbesondere bei Bruch bereits einer der die Federeinrichtung bildenden Tellerfedern, da hierdurch das gesamte Federpaket weitgehend seine Vorspannung verliert. Damit ist ein Verlust der Fähigkeit, Kraft auf den Spannkolben abzugeben, und somit eine erhebliche Reduzierung der Klemmkraft bzw. Haltekraft verbunden.Problems with these clamping devices arise in particular at break already one of the spring device forming disc springs, as a result, the entire spring package largely loses its bias. This is a loss the ability to apply force to the tensioning piston and thus a significant reduction of the clamping force or Holding power connected.

Andererseits fordern mit der Arbeitsplatzsicherheit befaßte Vereinigungen wie die Berufsgenossenschaft bei einem Einsatz von jeder wirkenden Verriegelungs-/Hochhalteeinrichtungen für Pressen und Spritzgießmaschinen, daß auch bei Bruch einer Feder kein Verlust der Sicherheitsfunktion eintreten darf, d.h. die Haltekraft der Klemmvorrichtung und somit der Kraftweg erhalten bleibt. Insbesondere in dem genannten Bereich von Pressen und Spritzgießmaschinen, wo die Klemm- und Halteeinrichtungen sehr große und für das Bedienpersonal mit Lebensgefahr verbundene Kräfte zu halten haben, ist eine Erfüllung dieser genossenschaftlichen Auflage unerläßlich und entscheidet über die Zulassung und Freigabe einer Klemmvorrichtung.On the other hand, job security professionals Associations such as the professional association in a mission from each acting latch / holdup device for presses and injection molding machines, that too at Breakage of a spring does not cause a loss of the safety function may, i. the holding force of the clamping device and thus the power path is maintained. In particular in the cited Range of presses and injection molding machines, where the Clamping and holding devices very large and for the operating personnel to keep connected forces with life danger is a fulfillment of this cooperative edition indispensable and decides on the approval and Release of a clamping device.

In der Vergangenheit wurden Klemmvorrichtungen zur Erfüllung dieser Auflage mit einer Klemmbackenanordnung ausgestaltet, die ein sicheres Abfangen einer hydraulisch angetriebenen Kolbenstange ermöglicht. Eine derartige Klemmbackenanordnung ist bspw. das der DE-OS 23 33 491 bekannt. Als nachteilig bei den bekannten Klemmbackenanordnungen ist festzuhalten, daß es in der Praxis bei einem Einsatz der Klemmbacken aufgrund der auftretenden Kräfte häufig zu Verkeilungen kommt, die je nach Größe der aufgetretenen und abgefangenen Kräfte nur unter Aufwand wieder gelöst werden können und nicht selten - bei übermäßiger Verkeilung - zu einer Beschädigung oder sogar Zerstörung der Vorrichtung führen.In the past, clamping devices have become a reality designed this edition with a jaw assembly, the safe interception of a hydraulically driven Piston rod allows. Such a jaw assembly is, for example, the DE-OS 23 33 491 known. A disadvantage of the known jaw arrangements note that in practice, when using the Jaws often due to the forces occurring wedges comes, depending on the size of the occurred and intercepted forces can only be solved with effort can and often - with excessive wedging - too damage or even destruction of the device to lead.

Demgegenüber wird erfindungsgemäß eine Klemmvorrichtung mit den Merkmalen des Anspruchs 1 sowie eine Stelleinrichtung mit einer erfindungsgemäßen Federeinrichtung bzw. Klemmvorrichtung vorgeschlagen.In contrast, according to the invention with a clamping device the features of claim 1 and an adjusting device with a spring device or clamping device according to the invention proposed.

Demnach umfaßt eine erfindungsgemäße Klemmvorrichtung für eine axial translatorisch und/oder drehend bewegte Stange ein Gehäuse, eine in dem Gehäuse axial festgelegte Klemmhülse, einen in dem als Zylinder ausgebildeten Gehäuse beweglichen Spannkolben sowie mindestens eine den Kolben in Richtung auf die Klemmhülse in den Verriegelungszustand vorspannende Schraubentellerfeder.Accordingly, a clamping device according to the invention for an axially translational and / or rotationally moving rod a housing, a clamping sleeve axially fixed in the housing, a movable in the housing designed as a cylinder Tensioning piston and at least one piston in Direction of the clamping sleeve in the locking state biasing screw plate spring.

Schraubentellerfedern an sich sind aus der DE 29 16 446 A1 bekannt. Dabei handelt es sich um zwei hochkant und schräg zur Mittelachse gewickelte Schraubenfedern, die in umgekehrtem Sinn derart ineinandergeschraubt sind, daß das nach dem Ineinanderschrauben gegeneinander geneigte Flachband der Federwindungen tellerfedersäulenartig beansprucht wird.Screw disc springs per se are known from DE 29 16 446 A1 known. These are two upright and diagonal to the central axis wound coil springs, in the inverse Sense are screwed together so that after the screwed against each other inclined flat band the spring coils plate spring column is claimed.

Die erfindungsgemäße Klemmvorrichtung mit Schraubentellerfedern hat den großen Vorteil, daß selbst bei einem Federbruch kein Federweg verloren geht und so die eingestellte Federkraft nahezu unverändert erhalten bleibt. Diese Eigenschaft verleiht einer Klemmvorrichtung, bei der die Haltekraft durch Federkraft erzeugt wird, ein hohes Maß an Funktionssicherheit, so daß beispielsweise die Vorschriften der Berufsgenossenschaft für den Einsatz federwirkender Verriegelungs-/Hochhalteeinrichtungen für hydraulische Pressen und Spritzgießmaschinen bei Verwendung von Schraubentellerfeldern erfüllt sind. The clamping device according to the invention with Schraubentellerfedern has the great advantage that even with a spring break no suspension travel is lost and so the set Spring force remains virtually unchanged. This attribute gives a clamping device in which the holding force produced by spring force, a high degree of functional reliability, so that, for example, the rules of Employers' liability insurance association for the use of spring-acting locking / holding devices for hydraulic presses and injection molding machines using helical disc fields are fulfilled.

Weitere Vorteile der Erfindung sind:

  • Günstigere Federkennlinien bei gleichem Einbauraum.
  • Die Vorspannkraft verringert sich um bis zu 10 %, was einen entsprechend geringeren Entriegelungsdruck ergibt, da praktisch keine Federreibung auftritt.
  • Es tritt kein Verschleiß an den Auflagepunkten auf.
  • Die einteilige Herstellung aus Bandmaterial mit einem nicht unterbrochenen Faserverlauf wirkt sich günstig auf die Lebensdauer des Federelements aus.
  • Durch die einteilige Ausführung ergeben sich Montagevorteile, und die Verwechslungsgefahr beim Schichten der Einzeltellerfedern zum Federpaket entfällt.
  • Es sind keine Schmiermittel notwendig.
  • Schraubentellerfedern sind kostengünstiger.
Further advantages of the invention are:
  • Cheaper spring characteristics with the same installation space.
  • The preload force is reduced by up to 10%, which results in a correspondingly lower unlocking pressure, since virtually no spring friction occurs.
  • There is no wear on the support points.
  • The one-piece production of strip material with a non-interrupted fiber flow has a favorable effect on the life of the spring element.
  • The one-piece design results in assembly advantages, and the likelihood of confusion when layers of single-plate springs to spring pack deleted.
  • There are no lubricants necessary.
  • Screw plate springs are cheaper.

Die Eignung von Schraubentellerfedern zur Verwendung in Klemmvorrichtungen wurden durch Dauerversuche über 2 Millionen Lastwechsel in hervorragender Weise bestätigt.The suitability of screw spring springs for use in Clamping devices have been tested over 2 million Load changes confirmed in an excellent way.

Als besonders vorteilhaft erweist sich eine erfindungsgemäße Anordnung mehrerer Schraubentellerfedern achsparallel um den Umfang der zu klemmenden Stange. Mit dieser Anordnung wird eine benötigte Gesamtfederkraft auf eine Mehrzahl von Federn aufgeteilt. Dadurch wird eine Verwendung von Federn mit relativ geringem Durchmesser auch bei Anwendungen ermöglicht, die eine hohe Vorspannkraft erfordern. Diese erfindungsgemäße Anordnung macht es überhaupt erst möglich, Schraubentellerfedern für derartige Anwendungen einzusetzen, da Schraubentellerfedern herstellungsbedingt als Einzelfedern nur bis zu einer Größe von ca. 50 mm Stangendurchmesser geliefert werden. Mit dieser Lösung ist es nunmehr möglich, auch sehr große federwirkende Klemmvorrichtungen zu realisieren. Diese mußten wegen fehlender Tellerfedergrößen bisher hydraulisch betrieben werden, womit jedoch Abschläge bei der Funktionssicherheit verbunden waren. Ein weiterer Aspekt zur Erhöhung der Funktionssicherheit besteht darin, daß bei dieser Mehrfach-Federsäulen-Anordnung die Funktionssicherheit auch bei Total-Ausfall einer Federsäule gewährleistet ist, da bei entsprechender Federauslegung die restlichen Federsäulen für die notwendige Haltekraft sorgen.Particularly advantageous is an inventive invention Arrangement of several helical plate springs axially parallel the circumference of the bar to be clamped. With this arrangement is a required total spring force on a plurality of Split springs. This will make a use of springs with relatively small diameter also possible in applications, which require a high preload force. This invention Arrangement makes it possible in the first place To use screw-spring springs for such applications, there screw spring springs manufacturing reasons as single springs only up to a size of approx. 50 mm rod diameter to be delivered. With this solution it is now possible, even very large spring-acting clamping devices to realize. These had to because of missing plate spring sizes previously operated hydraulically, but with what Reductions in the reliability were connected. Another aspect to increase the reliability is that in this multiple spring column arrangement the functional reliability even with total failure a spring column is guaranteed, since with appropriate Spring design the remaining spring columns for the necessary Holding power.

Mit den um den Umfang verteilten kleineren Schraubentellerfeder-Einheiten können noch vorteilhaftere Federkennlinien erreicht werden. Um für Klemmvorrichtungen bei gleichen Geräteabmessungen die günstigste Federkennlinie zu erhalten, können in weiterer Ausgestaltung der Erfindung in dem Spannkolben und/oder in einem Deckel der Klemmvorrichtung Eindrehungen zur Aufnahme eines oder beider der Enden der mindestens einen Schraubentellerfeder vorgesehen sein. In anderer Ausgestaltung sind in einer die Federeinrichtung aufnehmenden Bohrung des Gehäuses örtliche Ausnehmungen mit kreisabschnittsförmigem Grundriß vorgesehen.With smaller helical disc spring units distributed around the circumference can even more advantageous spring characteristics be achieved. To clamp for the same device dimensions to get the most favorable spring characteristic, can in a further embodiment of the invention in the Tensioning piston and / or in a lid of the clamping device Turns to receive one or both of the ends of the be provided at least one helical spring. In another embodiment are in a spring device receiving bore of the housing with local recesses provided in a circular section plan.

In Ausgestaltung der Erfindung ist die mindestens eine Schraubentellerfeder durch einen Bolzen geführt, der lediglich im Bereich der Enden der Feder die Schraubentellerfeder an deren Innendurchmesser führt. Dadurch wird die auftretende Reibung vernachlässigbar klein, da die Führung nur an den Federenden erfolgt. In an embodiment of the invention, the at least one Screw disc spring guided by a bolt, the only in the region of the ends of the spring, the helical spring leads to the inner diameter. This will cause the occurring Friction negligible small, since the guide only takes place at the spring ends.

In anderer vorteilhafter Ausgestaltung der Erfindung ist die mindestens eine Schraubentellerfeder koaxial zu der zu klemmenden Stange angeordnet. Mit dieser Ausgestaltung können auf einfachere Art und Weise Klemmvorrichtungen bis zu einem Stangendurchmesser von maximal 50 mm gestaltet werden. Auch hier erweist es sich zur Abstimmung der Federkennlinie im Verhältnis zum benötigten Platz als vorteilhaft, wenn in dem Spannkolben und/oder in einem Deckel der Klemmvorrichtungen Eindrehungen zur Aufnahme eines oder beider der Enden der Schraubentellerfeder vorgesehen sind.In another advantageous embodiment of the invention the at least one helical spring spring coaxial with the arranged clamping bar. With this configuration can in a simpler way clamping devices up to be designed a rod diameter of 50 mm maximum. Again, it turns out to vote the spring characteristic in relation to the required space as advantageous if in the tensioning piston and / or in a lid of Clamping devices Recesses for holding a or both of the ends of the helical spring are provided.

In Ausgestaltung der Erfindung wirkt die mindestens eine Schraubentellerfeder direkt auf die Klemmhülse ein, deren Außenkonus einen zugeordneten Innenkonus des Gehäuses beaufschlägt und deren Innendruchmesser sich aufgrund der axialen Verschiebung im Verriegelungszustand verkleinert, woraus ein Festklemmen der bewegten Stange erfolgt.In an embodiment of the invention, the at least one acts Screw disc spring directly on the clamping sleeve, whose Outside cone acts on an associated inner cone of the housing and their inside diameter is due to the reduced axial displacement in the locked state, resulting in a clamping of the moving rod.

Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der Beschreibung und der beiliegenden Zeichnung.Further advantages and embodiments of the invention result yourself from the description and the enclosed drawing.

Es versteht sich, daß die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the above and the hereinafter to be explained features not only in the each specified combination, but also in others Combinations or alone, without to leave the scope of the present invention.

Die Erfindung ist anhand von Ausführungsbeispielen in der Zeichnung schematisch dargestellt und wird im folgenden unter Bezugnahme auf die Zeichnung ausführlich beschrieben.

Figur 1
zeigt in schematischer Darstellung einen Längsschnitt durch eine erfindungsgemäße Klemmvorrichtung.
Figur 1a
zeigt einen Längsschnitt durch eine erfindungsgemäße Klemmvorrichtung gemäß Figur 1, wobei zu beiden Seiten der Längsmittellinie zwei unterschiedliche Ausführungsbeispiele der Anordnung einer Schraubentellerfedersäule dargestellt sind.
Figur 2
zeigt in schematischer Darstellung einen Längsschnitt durch eine aus dem Stand der Technik bekannte Klemmvorrichtung.
Figur 3
zeigt eine Draufsicht auf eine erfindungsgemäße Klemmvorrichtung mit um den Umfang verteilten Schraubentellerfedern.
Figur 3a
zeigt einen Querschnitt durch die Klemmvorrichtung der Figur 1a auf der Höhe der Schraubentellerfedern.
Figur 4
zeigt in seitlicher Ansicht eine teilgeschnittene Schraubentellerfeder, die lediglich im Bereich ihrer Federenden an ihrem Innendurchmesser durch einen Bolzen geführt ist.
Figur 5
zeigt in seitlicher Ansicht eine teilgeschnittene Schraubentellerfeder, die lediglich im Bereich ihrer Federenden an ihrem Außendurchmesser in einer Bohrung/Eindrehung geführt ist.
Figur 6
zeigt einen Längsschnitt durch eine Klemmvorrichtung mit einer koaxial zu der zu klemmenden Stange angeordneten Schraubentellerfeder.
The invention is illustrated schematically by means of embodiments in the drawing and will be described in detail below with reference to the drawing.
FIG. 1
shows a schematic representation of a longitudinal section through a clamping device according to the invention.
FIG. 1a
shows a longitudinal section through a clamping device according to the invention according to Figure 1, wherein on both sides of the longitudinal center line two different embodiments of the arrangement of a Schraubentellerfedersäule are shown.
FIG. 2
shows a schematic representation of a longitudinal section through a known from the prior art clamping device.
FIG. 3
shows a plan view of a clamping device according to the invention with distributed around the circumference helical plate springs.
FIG. 3a
shows a cross section through the clamping device of Figure 1a at the height of the helical plate springs.
FIG. 4
shows a side view of a partially cut screw plate spring, which is guided only in the region of its spring ends at its inner diameter by a bolt.
FIG. 5
shows a side view of a partially cut screw plate spring, which is guided only in the region of its spring ends at its outer diameter in a bore / recess.
FIG. 6
shows a longitudinal section through a clamping device with a coaxial with the rod to be clamped arranged screw plate spring.

Figur 2 zeigt eine Klemmeinrichtung, wie sie aus dem Stand der Technik, insbesondere aus der DE 37 070 46 A1, bekannt ist. Die bekannte Klemmvorrichtung 8 weist ein dreiteiliges Gehäuse 9 auf, in dem eine Stange 10 mittels einer Klemmhülse 11 festklemmbar ist. Dieses Festklemmen erfolgt über einen Spannkolben 12, der durch Beaufschlagung eines koaxial angeordneten Tellerfederpakets 13 mit einer Vorspannkraft versehen ist. Das Lösen der Klemmhülse 11 erfolgt mittels einer Druckmittelzufuhr zu dem Spannkolben 12, wobei die durch das Druckmittel ausgeübte Kraft der Vorspannkraft des Federpakets 13 entgegenwirkt.FIG. 2 shows a clamping device as it stands the technique, in particular from DE 37 070 46 A1, known is. The known clamping device 8 has a three-part Housing 9, in which a rod 10 by means of a clamping sleeve 11 is clamped. This clamping is done via a tensioning piston 12, by applying a coaxial arranged disc spring assemblies 13 with a biasing force is provided. The release of the clamping sleeve 11 takes place by means of a pressure medium supply to the tensioning piston 12, wherein the force of the biasing force exerted by the pressure means counteracts the spring package 13.

Das Tellerfedernpaket steht somit sowohl in der Klemm- als auch in der Lösestellung unter permanenter Vorspannung, d.h. sämtliche, das Tellerfedernpaket bildende Tellerfedern sind um den gleichen Betrag vorgespannt, wobei die Vorspannung in der Lösestellung höher ist. Da die Tellerfedern hintereinander geschaltet sind, gibt bei einer Einzelschichtung jede Feder die jeweils volle Vorspannkraft auf den Spannkolben ab.The disc spring package is thus both in the clamping as also in the release position under permanent pretension, i.e. all, the disc spring package forming disc springs are biased by the same amount, with the bias higher in the release position. Since the disc springs are connected in series, gives in a single stratification each spring on each full biasing force from the tensioning piston.

Bei Bruch einer Feder verliert das gesamte Federpaket weitgehend die Vorspannung und damit die Fähigkeit, Kraft auf den Spannkolben abzugeben. Damit wird die Klemmkraft bzw. die Haltekraft stark reduziert.When a spring breaks, the entire spring package largely loses the bias and thus the ability to force up to deliver the tensioning piston. Thus, the clamping force or the holding force is greatly reduced.

Bei mehrfach gleichsinnig ineinanderliegenden Tellerfedern tritt bei einem Federbruch ein ähnlicher Effekt auf, wobei diese Anordnung wegen hoher Reibung zwischen den sich berührenden Telleroberflächen mit Gefahr der Entstehung von Reibkorrosion in der Praxis kaum Anwendung findet.For multiple in the same direction nested disc springs occurs at a spring break, a similar effect, wherein this arrangement because of high friction between the touching Dish surfaces with danger of emergence of Fretting corrosion in practice hardly applies.

Demgegenüber zeigt Figur 1 einen Längsschnitt durch eine erfindungsgemäße Klemmvorrichtung 1. Die erfindungsgemäße Klemmvorrichtung 1 besteht ebenfalls aus einem dreiteiligen Gehäuse 2, in dem eine Stange 3 mittels einer Klemmhülse 4 festklemmbar ist. Dieses Festklemmen erfolgt über einen Spannkolben 5, der von mehreren um den Umfang der Stange 3 achsparallel angeordneten Schraubentellerfedern beaufschlagt ist. Die achsparallel zu der Stange 3 angeordneten Schraubentellerfedern 6 erzeugen die notwendige Vorspann- bzw. Klemmkraft für die Klemmhülse 4. Zum Einstellen der vorgeschriebenen Vorspannkraft sind Einstellscheiben 7 vorgesehen, die zwischen der einzelnen Schraubentellerfedersäule und dem Spannkolben 5 eingebracht sind.In contrast, Figure 1 shows a longitudinal section through a Clamping device according to the invention 1. The inventive Clamping device 1 also consists of a three-part Housing 2, in which a rod 3 by means of a clamping sleeve 4th can be clamped. This clamping is done via a Tensioning piston 5, of several around the circumference of the rod. 3 axially parallel arranged Schraubentellerfedern acted upon is. The axially parallel to the rod 3 arranged Screw disc springs 6 generate the necessary preload or clamping force for the clamping sleeve 4. To set the prescribed biasing force shims 7 are provided between the individual helical spring column and the tensioning piston 5 are introduced.

Die geometrische Anordnung der Schraubentellerfedern 6 gemäß der Erfindung ist in Draufsicht in Figur 3 dargestellt.The geometric arrangement of the screw plate springs 6 according to The invention is shown in plan view in FIG.

Figur 1a zeigt einen Längsschnitt durch eine erfindungsgemäße Klemmvorrichtung, wobei zu beiden Seiten der Längsmittellinie zwei unterschiedliche Ausführungsbeispiele für die Anordnung und Führung der Schraubentellerfedersäulen dargestellt sind.FIG. 1a shows a longitudinal section through an inventive device Clamping device, wherein on both sides of the longitudinal center line two different embodiments for the Arrangement and leadership of Schraubentellerfedersäulen shown are.

In dem in Figur 1a links der Längsmittellinie dargestellten Ausführungsbeispiel ist in einem die Gehäusewandung bzw. den Gehäusemantel bildenden Rohr 24 eine Ausnehmung 21 mit kreisabschnittsförmigem Grundriß vorgesehen, in die Schraubentellerfedern 6' mit einem Teil ihres Umfangs hineinragen. Durch die Ausnehmungen 21 wird die Verwendung von Schraubentellerfedern mit größerem Durchmesser ermöglicht, wodurch bei gleicher Baugröße des Klemmvorrichtungsgehäuses, d.h. gleichen Außenabmessungen der Klemmvorrichtung, die Verwendung von Schraubentellerfedern mit größerem Durchmesser und somit die Erzeugung einer größeren Vorspannkraft möglich wird. Eine Draufsicht auf die beschriebene Ausgestaltung mit den Ausnehmungen 21 mit kreisabschnittsförmigem Grundriß ist in Figur 3a dargestellt.In that shown in Figure 1a left of the longitudinal center line Embodiment is in a housing wall or the housing shell forming tube 24 a recess 21 with provided in a circular section plan, in the helical plate springs 6 'protrude with a portion of its circumference. Through the recesses 21, the use of Screw disc springs with larger diameter allows, whereby at the same size of the clamping device housing, i.e. same outer dimensions of the clamping device, the use of screw-spring springs with larger Diameter and thus the generation of a larger preload force becomes possible. A plan view of the described Embodiment with the recesses 21 with kreisabschnittsförmigem Plan view is shown in Figure 3a.

Ein weiteres Ausführungsbeispiel ist in der Figur 1a rechts von der Längsmittellinie dargestellt. In diesem Ausführungsbeispiel sind in dem Spannkolben 5 und in einem Gehäusedeckel 20 der Klemmvorrichtung Eindrehungen 22 vorgesehen, in denen die Enden der Schraubentellerfedersäulen 6" aufgenommen sind. Hierdurch wird - wiederum bei gleichen Außenabmessungen der Klemmvorrichtung - die Verwendung längerer Schraubentellerfedern 6" ermöglicht. Eine Draufsicht auf diese Ausgestaltung ist ebenfalls in Figur 3a, rechts von der Längsmittellinie dargestellt.Another embodiment is shown in FIG. 1a on the right represented by the longitudinal center line. In this embodiment are in the clamping piston 5 and in a housing cover 20 of the clamping device indentations 22 provided in which the ends of the screw disc spring columns 6 " are included. This will - again at the same External dimensions of the clamping device - the use of longer Screw plate springs 6 "allows to this embodiment is also in Figure 3a, right represented by the longitudinal center line.

Die Führung der Schraubentellerfedern 6, 6', 6", erfolgt bspw. mittels koaxial im Innern der Schraubentellerfedern angeordneten Bolzen. Erfindungsgemäß sind diese Führungsbolzen im Bereich der Enden 14, 15 der Schraubentellerfedern mit abkragenden Schultern versehen, deren Außendurchmesser etwa dem Innendurchmesser der Schraubentellerfedern entspricht, so daß eine Führung durch den Bolzen 18 lediglich im Bereich der Federenden 14, 15, erfolgt (vgl. Figur 4). Dadurch wird die Reibung erheblich reduziert.The leadership of Schraubentellerfedern 6, 6 ', 6 ", takes place For example by means of coaxial inside the helical plate springs arranged bolts. According to the invention, these guide pins in the region of the ends 14, 15 of the screw disc springs provided with cantilevered shoulders whose outer diameter about the inner diameter of the helical plate springs corresponds, so that a guide by the bolt 18 only in the region of the spring ends 14, 15, takes place (see FIG 4). This considerably reduces the friction.

Ebenso ist es erfindungsgemäß möglich, die Schraubentellerfedern nicht an ihrem Innendurchmesser, sondern an ihrem Außendurchmesser zu führen. Dies erfolgt durch Anbringen einer Schraubentellerfeder 6 in einer Bohrung 26, die im Bereich der Federenden 16, 17 den Innendurchmesser der Bohrung 26 verkleinernde Schultern aufweist, deren lichte Weite in etwa dem Außendurchmesser der Schraubentellerfeder 6 entspricht, so daß dieser im Bereich der Schultern geführt wird (vgl. Figur 5). Selbstverständlich ist diese Art der Führung auch durch zwei Bohrungen realisierbar, die jeweils nur eines der beiden Federenden 16 bzw. 17 umgeben und den Außendurchmesser der Federenden zur Führung beaufschlagen. Bei diesen beiden Bohrungen kann es sich bspw. um die Eindrehungen 22 der Figur 1a handeln.Likewise, it is possible according to the invention, the Schraubentellerfedern not on her inside diameter, but on her Outer diameter to lead. This is done by attaching a helical spring 6 in a bore 26 in the Area of the spring ends 16, 17, the inner diameter of the bore 26 has smaller shoulders, whose clear width in about the outer diameter of the helical spring 6th corresponds so that this led in the area of the shoulders becomes (see Figure 5). Of course this is the type of Leadership also feasible through two holes, each surrounded only one of the two spring ends 16 and 17 and the Apply outside diameter of the spring ends to the guide. These two holes may be, for example, the grooves 22 of Figure 1a act.

Figur 6 schließlich zeigt einen Längsschnitt durch eine erfindungsgemäße Klemmvorrichtung, bei der eine Schraubentellerfeder 19 koaxial zu der zu klemmenden Stange 3 angeordnet ist.Finally, FIG. 6 shows a longitudinal section through an inventive device Clamping device in which a helical plate spring 19 arranged coaxially with the rod 3 to be clamped is.

Claims (10)

  1. Clamping device for a rod (3) which is movable in axial translation and/or in rotation, having a housing (2), a clamping sleeve (4) axially secured therein, a tensioning piston (5) movable in the cylinder-shaped housing, and having a spring device which biases the piston (5) towards the clamping sleeve (4) in the locking position, characterised in that there is provided, as the spring device, at least one helical plate spring (6, 6', 6", 19) which maintains the retaining force and a path for operation of the spring device in the event of breakage.
  2. Clamping device according to claim 1, characterised in that the at least one helical plate spring (19) is arranged coaxially with the rod (3) which is to be clamped.
  3. Clamping device according to claim 1, characterised in that for distributing a prestressing force acting on the spring device a plurality of helical plate springs (6, 6', 6") are arranged paraxially around the circumference of the rod (3).
  4. Clamping device according to claim 2 or 3, characterised in that indents (22) are provided in the tensioning piston (5) and/or in a cover (20) of the clamping device, for accommodating one or both ends of the at least one helical plate spring (6").
  5. Clamping device according to one of the preceding claims, characterised in that at least one helical plate spring consists of two identical helical pressure springs screwed into one another, resembling a plate spring in cross-section and made of strip steel.
  6. Clamping device according to claim 3, characterised in that the at least one helical plate spring is passed through a bolt which guides the helical plate spring along the internal diameter thereof, solely in the region of the ends of the spring.
  7. Clamping device according to one of the preceding claims, characterised in that guiding of the least one helical plate spring along its external diameter takes place solely in the region of the ends of the spring.
  8. Clamping device according to one of the preceding claims, characterised in that the at least one helical plate spring acts directly on the clamping sleeve, the outer cone of which acts on an associated inner cone of the housing, and the internal diameter of which decreases in size as a result of the axial displacement in the locking position, resulting in clamping of the moving rod.
  9. Clamping device according to claim 3, characterised in that recesses (21) with an outline in the shape of a segment of a circle are provided in a bore in the housing which accommodates the spring device.
  10. Regulating unit, particularly a working cylinder, having a piston rod, characterised by a clamping device according to one of claims 1 to 9.
EP02787823A 2001-11-27 2002-11-26 Clamping device and regulating unit Expired - Lifetime EP1448900B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10158844 2001-11-27
DE10158844A DE10158844A1 (en) 2001-11-27 2001-11-27 Clamping device and adjusting device
PCT/EP2002/013304 WO2003046389A1 (en) 2001-11-27 2002-11-26 Clamping device and regulating unit

Publications (2)

Publication Number Publication Date
EP1448900A1 EP1448900A1 (en) 2004-08-25
EP1448900B1 true EP1448900B1 (en) 2005-03-09

Family

ID=7707562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787823A Expired - Lifetime EP1448900B1 (en) 2001-11-27 2002-11-26 Clamping device and regulating unit

Country Status (10)

Country Link
US (1) US8028615B2 (en)
EP (1) EP1448900B1 (en)
CN (1) CN100366924C (en)
AT (1) ATE290653T1 (en)
AU (1) AU2002352149A1 (en)
DE (2) DE10158844A1 (en)
ES (1) ES2237705T3 (en)
PT (1) PT1448900E (en)
UA (1) UA74099C2 (en)
WO (1) WO2003046389A1 (en)

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DE102008057053A1 (en) 2008-08-29 2010-04-29 Benteler Automobiltechnik Gmbh Device for active track steering of vehicle wheels
DE102008057052A1 (en) 2008-08-29 2010-07-15 Benteler Automobiltechnik Gmbh Device for active track steering of vehicle wheels

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DE102009041907B4 (en) * 2009-09-20 2015-01-22 Günther Zimmer Brake and / or clamping device with dimensionally stable central body
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FR3049963B1 (en) 2016-04-12 2020-05-22 Matisa Materiel Industriel S.A. STOWING SYSTEM OF A RAILWAY APPARATUS EQUIPPED WITH A STOWING MECHANISM, VEHICLE AND RELATED TRANSPORT METHOD
CN106701534B (en) * 2017-01-01 2019-04-05 重庆科技学院 A kind of application method of cell scratch experiment lid
CN106520525B (en) * 2017-01-01 2019-03-05 重庆科技学院 A kind of cell scratch experiment lid
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CN110388349B (en) * 2019-06-28 2020-06-09 威海立新液压气动机械有限公司 Hydraulic cylinder body with high operation stability

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DE102008057052A1 (en) 2008-08-29 2010-07-15 Benteler Automobiltechnik Gmbh Device for active track steering of vehicle wheels
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DE102008057052B4 (en) * 2008-08-29 2011-06-16 Benteler Automobiltechnik Gmbh Device for active track steering of vehicle wheels

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US20110107907A1 (en) 2011-05-12
EP1448900A1 (en) 2004-08-25
ES2237705T3 (en) 2005-08-01
ATE290653T1 (en) 2005-03-15
CN100366924C (en) 2008-02-06
DE10158844A1 (en) 2003-06-12
DE50202445D1 (en) 2005-04-14
US8028615B2 (en) 2011-10-04
WO2003046389A1 (en) 2003-06-05
PT1448900E (en) 2005-07-29
UA74099C2 (en) 2005-10-17
AU2002352149A1 (en) 2003-06-10
CN1596344A (en) 2005-03-16

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