WO2001096129A1 - Pneumatic spring comprising an elastomeric pneumatic spring bellows for elastically supporting two parts that can move in relation to one another - Google Patents

Pneumatic spring comprising an elastomeric pneumatic spring bellows for elastically supporting two parts that can move in relation to one another Download PDF

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Publication number
WO2001096129A1
WO2001096129A1 PCT/EP2001/005718 EP0105718W WO0196129A1 WO 2001096129 A1 WO2001096129 A1 WO 2001096129A1 EP 0105718 W EP0105718 W EP 0105718W WO 0196129 A1 WO0196129 A1 WO 0196129A1
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WO
WIPO (PCT)
Prior art keywords
band
bellows
air
pneumatic spring
air spring
Prior art date
Application number
PCT/EP2001/005718
Other languages
German (de)
French (fr)
Inventor
Bernd Stöter
Andreas Fleck
Original Assignee
Contitech Luftfedersysteme Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Contitech Luftfedersysteme Gmbh filed Critical Contitech Luftfedersysteme Gmbh
Publication of WO2001096129A1 publication Critical patent/WO2001096129A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
    • B60G11/27—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs wherein the fluid is a gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/48—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds not including leaf springs
    • B60G11/62—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds not including leaf springs having both rubber springs and fluid springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/005—Suspension locking arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/04—Buffer means for limiting movement of arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/14—Plastic spring, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B60G2204/4504—Stops limiting travel using cable or band to prevent extension

Definitions

  • Air spring with an elastomeric air bellows for resilient support of two parts that can be moved against each other
  • the invention relates to an air spring with an elastomeric air bellows, which is sealed at both ends by fastening parts, via which the air bellows is connected, on the one hand, to a stationary part and, on the other hand, to a part to be cushioned, the deflection being limited by a mechanical securing means.
  • air springs offer the same suspension behavior at full load as well as at Le * .rlast.
  • the air bellows are sealed at both open ends by means of fastening parts and fastened to the vehicle via these.
  • the air suspension bellows completed with the fastening parts to form an air spring are installed, for example, between the vehicle frame and the axles, the upper fastening part on the vehicle frame and the bottom fastening part, which is usually designed as a rolling bellows in the case of a rolling bellows, being attached with its base to an elongated handlebar of the axle.
  • Air springs are also used for industrial applications. They can be used as spring elements in vibration isolation for foundations or laboratory floors and other elastic bearings.
  • the known devices for securing against lifting or limiting the deflection path require additional components and in some cases. an additional service.
  • a .separate installation space for the anti-lift device is necessary on the parts to be cushioned.
  • the invention has for its object to provide an air spring through which a limitation of the rebound path or avoiding the pulling off of the air bellows is possible in a simple manner.
  • the invention is achieved in that the fastening parts within the air bellows are flexibly connected to one another via a band-shaped means, and in that the maximum permissible deflection or pull-out height is limited by the maximum possible extension of the band-shaped means.
  • the flexibility of the anti-lift device implemented via the integrated band-shaped means is seen in the possibility of a lateral displacement of the fastening parts relative to one another.
  • the distance between the two fasteners is set by the length of the tape.
  • the maximum rebound height is advantageously set.
  • the air spring height can be set precisely. Compression is still possible, while pulling off the air bellows is prevented when the suspended component is raised.
  • the anti-lift device is protected against contamination and other atmospheric influences in the space enclosed by the air bellows. Due to the design according to the invention, the air spring manufacturer can supply a compact unit that can be assembled like a conventional air spring without additional effort. Only the fastening parts of the air springs have to be installed or placed between the components to be cushioned.
  • the installation space of the device according to the invention is smaller than in the case of an air spring device which has a separate anti-lift device.
  • the central force application of the lifting safety device prevents additional moments from being introduced into the components to be cushioned in comparison to the non-central force application of the known lifting devices arranged outside the air bellows.
  • the fastening parts according to claim 2 have, on their surfaces facing the air spring interior, bow-shaped fastening attachments to which the band-shaped means is fastened.
  • the band-shaped means remains loosely wrapped around the bracket in the normal spring deflection of the air spring and can move laterally.
  • the band shape enables full-area power transmission to the fastening parts.
  • the band-shaped means is turned over several times around the bow-shaped attachment lugs and its ends are connected to one another for continuous shaping.
  • one or both bow-shaped attachment lugs are resiliently suspended. This ensures a smoother response of the lifting safety device.
  • the band-shaped means has its own spring action, which is thus integrated into the band.
  • FIG. 1 shows an air spring in section with an integrated anti-lift device in the form of a belt
  • Fig. 2 shows a modified embodiment of the design of FIG. 1 with an additional suspension of the upper fastening device for the belt.
  • the air bellows 11 shown in FIG. 1, as a torus, is made of a natural or synthetic rubber mixture with embedded strength members.
  • a core ring 14 and 15 are embedded in each of its two annular beads 12 and 13.
  • the air bellows 11 is inserted between two components 16 and 17 of a test stand, which are spring-loaded against one another, with its beads 12 and 13 being pushed onto conical sealing seats 18 and 19 of two fastening parts 21 and 22 and sealing against them.
  • the upper conical sealing seat 18 is formed on an annular extension 20 of the fastening part 21.
  • the fastening part 21 bears from below against the component 16 to be cushioned, for example a concrete block.
  • the lower conical sealing seat 19 is mounted on a cylindrical support body 23 of the lower fastening part 22.
  • the support body 23 carries a metallic rim ring 27, against which the lower annular bead 13 of the bellows 11 bears in pressure-tight bracing from the outside.
  • the outer annular surface of the annular bead 19 lies on the rim flange 31 which jumps outwards horizontally.
  • the rim flange 31 is rounded at its periphery and is touched by the bellows wall.
  • the bellows 11 is pressurized with compressed air of controllable pressure via the pressure medium connection 32 in the support body 23 by means not shown and executes the spring movements forced with changes in the distance of the components 16 and 19 to be cushioned by shortening and lengthening the depending roll fold 33.
  • the upper mounting plate 21 has two bearing blocks 36 fastened with screws 35 within the annular extension 20 and carrying a horizontal holding rod 37.
  • the base plate 38 of the lower fastening part 22 has a welded bracket 39.
  • a band-shaped means in the form of a delimitation band (wrapping band) 41 is wrapped around the support rod 37 and the bracket 39 in multiple pulley-like arrangement, the ends of which are firmly connected to one another by means not shown here.
  • the looping of the limiting end 41 limits a predetermined rebound height when the air spring is put under pressure and prevents the air bellows 11 from being pulled off the sealing seats 18 and 19 when the upper component 16 is lifted off.
  • the limiting band 41 consists of a polyester fabric that is impregnated with polyurethane. This limiting band 41 is light, soft and flexible and is characterized by high strength.
  • the embodiment according to FIG. 2 differs from FIG. 1 in that the bearing blocks 36 for the horizontal support rod 37 can be displaced on the vertical fastening bolts 43 against a compression spring 44 arranged on the fastening bolts 43 to the bellows center.
  • the bearing blocks 36 are spring-loaded against the fastening part 21. This ensures a smoother response of the lifting safety device. LIST OF REFERENCE NUMBERS
  • Lifting strap, band-shaped means (delimiting strap; wrapping strap)

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A sealed pneumatic spring bellows is inserted between two component parts that are to be dampened with regard to one another. The dampening of the bellows is limited by a mechanical securing means, which consists of a band-shaped means (41) located inside the pneumatic spring bellows (11). The fastening parts of the pneumatic spring bellows (11) can be joined to one another in a flexible manner. The maximum permissible dampening is limited by the maximum possible extension of the band-shaped means (41).

Description

Beschreibung description
Luftfeder mit einem elastomeren Luftfederbalg zur federnden Abstützung von zwei gegeneinander bewegbaren TeilenAir spring with an elastomeric air bellows for resilient support of two parts that can be moved against each other
Die Erfindung betrifft eine Luftfeder mit einem elastomeren Luftfederbalg, der an seinen beiden Enden durch Befestigungsteile abgedichtet ist, über die der Luftfederbalg einerseits mit einem stationären Teil und andererseits mit einem abzufedernden Teil verbunden ist, wobei die Ausfederung durch ein mechanisches Sicherungsmittel begrenzt ist.The invention relates to an air spring with an elastomeric air bellows, which is sealed at both ends by fastening parts, via which the air bellows is connected, on the one hand, to a stationary part and, on the other hand, to a part to be cushioned, the deflection being limited by a mechanical securing means.
Bei Nutzfahrzeugen bieten Luftfedern vorteilhaft bei Vollast als auch bei Le*.rlast gleiches Federungsverhalten. Die Luftfederbälge sind an beiden offenen Enden mittels Befestigungsteilen abgedichtet und über diese am Fahrzeug befestigt. Die mit den Befestigungsteilen zu einer Luftfeder komplettierten Luftfederbälge werden beispielsweise zwischen dem Fahrzeugrahmen und den Achsen eingebaut, wobei das obere Befestigungsteil am Fahrzeugrahmen und das bei einem Rollbalg als Luftfederbalg üblicherweise als Abrollkolben ausgebildete untere Befestigungsteil mit seinem Boden an einem verlängerten Lenker der Achse befestigt sind.In commercial vehicles, air springs offer the same suspension behavior at full load as well as at Le * .rlast. The air bellows are sealed at both open ends by means of fastening parts and fastened to the vehicle via these. The air suspension bellows completed with the fastening parts to form an air spring are installed, for example, between the vehicle frame and the axles, the upper fastening part on the vehicle frame and the bottom fastening part, which is usually designed as a rolling bellows in the case of a rolling bellows, being attached with its base to an elongated handlebar of the axle.
Luftfedern werden auch für industrielle Anwendungen eingesetzt. Dabei können sie als Federelemente in der Schwingungsisolierung für Fundamente oder Laborböden und andere elastische Lagerungen eingesetzt werden.Air springs are also used for industrial applications. They can be used as spring elements in vibration isolation for foundations or laboratory floors and other elastic bearings.
Bei allen diesen Anwendungsfällen kann es notwendig sein, den Ausfederweg der Luftfeder zu begrenzen, damit keine unerwünschten Ausfederwege auftreten oder die Luftbälge nicht von ihren Befestigungsteilen abgezogen werden, im Bereich der Nutzfahrzeuge ist es dabei bekannt, Luftfederachsen auf beiden Seiten neben den Luftfederbälgen mit einem Fangseil auszurüsten, welches vom Fahrgestell ausgehend unter dem Achskörper durchgeführt und wieder am Fahrgestell befestigt ist. Mit diesen bekannten Fangseilen wird der Ausfederweg der Luftfederbälge ungefedert begrenzt.In all of these applications, it may be necessary to limit the rebound travel of the air spring so that no undesired rebound travel occurs or the air bellows are not pulled off their fastening parts. In the commercial vehicle sector, it is known to have air suspension axles on both sides next to the air spring bellows with a safety rope equip which, starting from the chassis, carried out under the axle beam and back on Chassis is attached. With these known safety ropes, the rebound travel of the air bellows is limited unsprung.
Aus der DE 41 26 998 C2 ist es bekannt, eine elastische Begrenzung des Ausfederweges einer Luftfederachse vorzunehmen. Dafür wird zwischen dem Fahrgestell und der Achse ein den Ausfederweg elastisch begrenzendes Federelement vorgeschlagen. Dieses elastisch begrenzende Federelement kann ein separater Luftfederbalg sein, der im Zusammenspiel mit einem von der Achse bewegbaren Gehäuse den Ausfederweg der tragenden Luftfederbälge begrenzt.From DE 41 26 998 C2 it is known to carry out an elastic limitation of the rebound path of an air spring axis. For this purpose, a spring element that elastically limits the rebound travel is proposed between the chassis and the axle. This elastically limiting spring element can be a separate air bellows which, in interaction with a housing which can be moved by the axis, limits the spring travel of the supporting air bellows.
Die bekannten Vorrichtungen zur Abhebesicherung bzw. Begrenzung des Ausfederungsweges benötigen zusätzliche Bauteile und z.T. eine zusätzliche Bedienung. Für die Montage am Fahrzeug bzw. bei einer industriellen Anwendung ist an den abzufedernden Teilen ein .separater Bauraum für die Abhebesicherung notwendig.The known devices for securing against lifting or limiting the deflection path require additional components and in some cases. an additional service. For installation on the vehicle or in an industrial application, a .separate installation space for the anti-lift device is necessary on the parts to be cushioned.
Der Erfindung liegt die Aufgabe zugrunde, eine Luftfeder zu schaffen, durch die eine Begrenzung des Ausfederweges bzw. ein Vermeiden des Abziehens des Luftfederbalges in einfacher Weise möglich ist.The invention has for its object to provide an air spring through which a limitation of the rebound path or avoiding the pulling off of the air bellows is possible in a simple manner.
Die Erfindung wird dadurch gelöst, daß die Befestigungsteile innerhalb des Luftfederbalges über ein bandförmiges Mittel miteinander flexibel verbunden sind, und daß die maximal zulässige Ausfederung bzw. Auszugshöhe durch die maximal mögliche Streckung des bandförmigen Mittels begrenzt ist.The invention is achieved in that the fastening parts within the air bellows are flexibly connected to one another via a band-shaped means, and in that the maximum permissible deflection or pull-out height is limited by the maximum possible extension of the band-shaped means.
Die Flexibilität der über das integrierte bandförmige Mittel realisierten Abhebesicherung wird in der Möglichkeit einer seitlichen Verschiebung der Befestigungsteile zueinander gesehen. Der Abstand der beiden Befestigungsteile zueinander wird durch die Längenabstimmung des Bandes eingestellt. Dabei wird vorteilhafter Weise die maximale Ausfederhöhe eingestellt. Ein Einstellen der Luftfederhöhe ist genau möglich. Ein Einfedern ist weiterhin möglich, während bei einem Anheben des abgefederten Bauteils ein Abziehen des Luftfederbalges verhindert wird. Die Abhebesicherung ist in dem von dem Luftfederbalg umschlossenen Raum gegenüber Verschmutzung und anderen atmosphärischen Einwirkungen geschützt. Durch die erfindungsgemäße Ausbildung ist von dem Luftfederhersteller ein kompaktes Aggregat lieferbar, das ohne zusätzlichen Aufwand wie eine übliche Luftfeder montierbar ist. Lediglich die Befestigungsteile der Luftfedern müssen zwischen die abzufedernden Bauteile montiert oder gestellt werden. Eine separate Montage und Justierung der Abhebesicherung entfällt. Der Bauraum der erfindungsgemäßen Vorrichtung ist geringer als bei einer Luftfedervorrichtung, die eine separate Abhebesicherung aufweist. Außerdem verhindert der zentrale Kraftangriff der Abhebesicherung die Einleitung von zusätzlichen Momenten In die abzufedernden Bauteile im Vergleich zum nichtzentralen Kraftangriff der bekannten, außerhalb des Luf-federbalges angeordneten Abhebesicherungen.The flexibility of the anti-lift device implemented via the integrated band-shaped means is seen in the possibility of a lateral displacement of the fastening parts relative to one another. The distance between the two fasteners is set by the length of the tape. The maximum rebound height is advantageously set. The air spring height can be set precisely. Compression is still possible, while pulling off the air bellows is prevented when the suspended component is raised. The anti-lift device is protected against contamination and other atmospheric influences in the space enclosed by the air bellows. Due to the design according to the invention, the air spring manufacturer can supply a compact unit that can be assembled like a conventional air spring without additional effort. Only the fastening parts of the air springs have to be installed or placed between the components to be cushioned. A separate assembly and adjustment of the lifting safety device is not necessary. The installation space of the device according to the invention is smaller than in the case of an air spring device which has a separate anti-lift device. In addition, the central force application of the lifting safety device prevents additional moments from being introduced into the components to be cushioned in comparison to the non-central force application of the known lifting devices arranged outside the air bellows.
In vorteilhafter Ausgestaltung der Erfindung weisen die Befestigungsteile gemäß Anspruch 2 auf ihren zum Luftfederinnenraum gerichtete Flächen bügeiförmige Befestigungsansät∑e auf, an denen das bandförmige Mittel befestigt ist. Das bandförmige Mittel bleibt in der Normaleinfederung der Luftfeder locker um die Bügel geschlungen und kann sich seitlich bewegen. Die Bandform ermöglicht eine vollflächige Kraftübertragung auf die Befestigungsteile.In an advantageous embodiment of the invention, the fastening parts according to claim 2 have, on their surfaces facing the air spring interior, bow-shaped fastening attachments to which the band-shaped means is fastened. The band-shaped means remains loosely wrapped around the bracket in the normal spring deflection of the air spring and can move laterally. The band shape enables full-area power transmission to the fastening parts.
In weiterer vorteilhafter Ausgestaltung der Erfindung nach Anspruch 3 ist das bandförmige Mittel mehrfach um die bügeiförmigen Befestigungsansätze umgeschlagen und seine Enden zum Endlosmächen miteinander verbunden. Diese Mehrfachumschlingung in Art eines Flaschenzuges ergibt eine gute Kraftaufteilung für jeden Umschlingungsbogen und eine gleichmäßigere Kraftverteilung als es einzelne Bänder aufgrund der dann zu beachtenden Fertigungstoleranzen geben könnten.In a further advantageous embodiment of the invention according to claim 3, the band-shaped means is turned over several times around the bow-shaped attachment lugs and its ends are connected to one another for continuous shaping. This multiple looping in the manner of a block and tackle results in a good distribution of force for each loop and a more even force distribution than individual belts could be due to the manufacturing tolerances then to be observed.
In weiterer vorteilhafter Ausgestaltung der Erfindung sind ein oder beide bügeiförmige Befestigungsansätze federnd aufgehängt. Dadurch wird ein sanfteres Ansprechverhalten der Abhebesicherung erreicht. Gemäß dem Merkmal in Anspruch 5 weist das bandförmige Mittel eine eigene Federwirkung auf, die somit in das Band integriert ist.In a further advantageous embodiment of the invention, one or both bow-shaped attachment lugs are resiliently suspended. This ensures a smoother response of the lifting safety device. According to the feature in claim 5, the band-shaped means has its own spring action, which is thus integrated into the band.
Anhand der Zeichnung werden zwei Ausführungsbeispiele der Erfindung nachstehend näher erläutert. Es zeigtTwo exemplary embodiments of the invention are explained in more detail below with reference to the drawing. It shows
Fig. 1 im Schnitt eine Luftfeder mit einer integrierten Abhebesicherung in Form eines Umschlingungsbandes,1 shows an air spring in section with an integrated anti-lift device in the form of a belt,
Fig. 2 eine modifizierte Ausführungsform der Ausbildung nach Fig. 1 mit einer zusätzlichen Federung der oberen Befestigungsvorrichtung für das Umschlingungsband.Fig. 2 shows a modified embodiment of the design of FIG. 1 with an additional suspension of the upper fastening device for the belt.
Der in Fig. 1 dargestellte Luftfederbalg 11 ist als Torusköf er aus einer natürlichen oder synthetischen Kautschukmischung mit eingebetteten Festigkeitsträgern hergestellt. In seinen beiden Ringwulsten 12 und 13 ist jeweils ein Kernring 14 bzw. 15 eingebettet.The air bellows 11 shown in FIG. 1, as a torus, is made of a natural or synthetic rubber mixture with embedded strength members. A core ring 14 and 15 are embedded in each of its two annular beads 12 and 13.
Der Luftfederbalg 11 ist zwischen zwei gegeneinander abgefederte Bauteile 16 und 17 eines Prüf Standes eingesetzt, wobei er mit seinen Wülsten 12 und 13 auf konischen Dichtsitzen 18 und 19 zweier Befestigungsteile 21 und 22 aufgeschoben ist und gegen diese abdichtet.The air bellows 11 is inserted between two components 16 and 17 of a test stand, which are spring-loaded against one another, with its beads 12 and 13 being pushed onto conical sealing seats 18 and 19 of two fastening parts 21 and 22 and sealing against them.
Der obere konische Dichtsitz 18 ist an einem ringförmigen Ansatz 20 des Befestigungsteiles 21 angeformt. Das Befestigungsteil 21 liegt von unten gegen das abzufedernde Bauteil 16, z.B. einen Betonblock an. Der untere konische Dichtsitz 19 ist auf einem zylindrischen Stützkörper 23 des unteren Befestigungsteiles 22 angebracht. Der Stützkörper 23 trägt einen metallischen Felgenring 27, gegen den sich der untere Ringwulst 13 des Federbalges 11 in druckdichter Verspannung von außen anlegt. Auf dem horizontal nach außen springenden Felgenhorn 31 liegt die äußere Ringfläche des Ringwulstes 19. Das Felgenhorn 31 ist an seinem Umfang abgerundet und wird von der Balgwand berührt. Der Rollbalg 11 wird über nicht weiter dargestellte Mittel mit Druckluft von regelbarem Druck über den Druckmittelanschluß 32 im Stützkörper 23 beaufschlagt und führt die mit Abstandsänderungen der abzufedernden Bauteile 16 und 19 aufgezwungenen Federbewegungen durch Verkürzen und Verlängern der herabhängenden Rollfalte 33 aus.The upper conical sealing seat 18 is formed on an annular extension 20 of the fastening part 21. The fastening part 21 bears from below against the component 16 to be cushioned, for example a concrete block. The lower conical sealing seat 19 is mounted on a cylindrical support body 23 of the lower fastening part 22. The support body 23 carries a metallic rim ring 27, against which the lower annular bead 13 of the bellows 11 bears in pressure-tight bracing from the outside. The outer annular surface of the annular bead 19 lies on the rim flange 31 which jumps outwards horizontally. The rim flange 31 is rounded at its periphery and is touched by the bellows wall. The bellows 11 is pressurized with compressed air of controllable pressure via the pressure medium connection 32 in the support body 23 by means not shown and executes the spring movements forced with changes in the distance of the components 16 and 19 to be cushioned by shortening and lengthening the depending roll fold 33.
Die obere Befestigungsplatte 21 weist innerhalb des ringförmigen Ansatzes 20 zwei mit Schrauben 35 befestigte Lagerböcke 36 auf, die eine horizontale Haltestange 37 tragen. Gegenüberliegend weist die Bodenplatte 38 des unteren Befestigungsteiles 22 einen angeschweißten Bügel 39 auf. Um die Haltestange 37 und den Bügel 39 ist in mehrfacher flaschenzugartiger Anordnung ein bandförmiges Mittel in Form eines Begrenzungsbandes (Umschlingungsband) 41 geschlungen, dessen Enden miteinander durch hier nicht dargestellte Mittel fest verbunden sind. Die '• 'mschlingung des Begrenzungsbεndes 41 begrenzt eine vorgegebene Ausfederhöhe, wenn die Luftfeder unter Druck gesetzt wird und verhindert ein Abziehen des Luftfederbalges 11 von den Dichtsitzen 18 bzw. 19, wenn das obere Bauteil 16 abgehoben wird.The upper mounting plate 21 has two bearing blocks 36 fastened with screws 35 within the annular extension 20 and carrying a horizontal holding rod 37. Opposite, the base plate 38 of the lower fastening part 22 has a welded bracket 39. A band-shaped means in the form of a delimitation band (wrapping band) 41 is wrapped around the support rod 37 and the bracket 39 in multiple pulley-like arrangement, the ends of which are firmly connected to one another by means not shown here. The looping of the limiting end 41 limits a predetermined rebound height when the air spring is put under pressure and prevents the air bellows 11 from being pulled off the sealing seats 18 and 19 when the upper component 16 is lifted off.
Das Begrenzungsband 41 besteht aus einem Polyestergewebe, das mit Polyurethan imprägniert ist. Dieses Begrenzungsband 41 ist leicht, weich und flexibel und zeichnet sich durch eine hohe Festigkeit aus.The limiting band 41 consists of a polyester fabric that is impregnated with polyurethane. This limiting band 41 is light, soft and flexible and is characterized by high strength.
Die Ausgestaltung gemäß Fig.2 unterscheidet sich von Fig. 1 dadurch, daß die Lagerböcke 36 für die horizontale Haltestange 37 auf senkrechten Befestigungsbolzen 43 gegen jeweils eine auf den Befestigungsbolzen 43 angeordnete Druckfeder 44 zum Balgzentrum verschiebbar sind. Die Lagerblöcke 36 sind federnd gegen das Befestigungsteil 21 beaufschlagt. Dadurch wird ein sanfteres Ansprechverhalten der Abhebesicherung erreicht. BezugszeichenlisteThe embodiment according to FIG. 2 differs from FIG. 1 in that the bearing blocks 36 for the horizontal support rod 37 can be displaced on the vertical fastening bolts 43 against a compression spring 44 arranged on the fastening bolts 43 to the bellows center. The bearing blocks 36 are spring-loaded against the fastening part 21. This ensures a smoother response of the lifting safety device. LIST OF REFERENCE NUMBERS
11 Luftfederbalg11 air bag
12 Ringwulst12 ring bead
13 Ringwulst 4 Kernring 5 Kernring 6 Bauteil 7 Bauteil 8 Dichtsitz, konisch 9 Dichtsitz, konisch 0 ringförmiger Ansatz 1 Befestigungsteil, oben 2 Befestigungsteil, unten 3 zylindrischer Stützkörper 7 Felgenring 1 Felgenhorn 2 Druckmittelanschluß 3 Rollfalte 4 Gürtel 5 Schrauben 6 Lagerböcke 7 Haltestange 8 Bodenplatte 9 Bügel13 ring bead 4 core ring 5 core ring 6 component 7 component 8 sealing seat, conical 9 sealing seat, conical 0 ring-shaped attachment 1 fastening part, top 2 fastening part, bottom 3 cylindrical support body 7 rim ring 1 rim flange 2 pressure medium connection 3 roller fold 4 belt 5 screws 6 bearing blocks 7 holding rod 8 base plate 9 brackets
Hebeband bandförmiges Mittel (Begrenzungsband; Umschlingungsband)Lifting strap, band-shaped means (delimiting strap; wrapping strap)
Befestigungsbolzenmounting bolts
Druckfeder compression spring

Claims

Patentansprüche claims
1. Luftfeder mit einem elastomeren Luftfederbalg, der an seinen beiden1. Air spring with an elastomeric air bellows attached to its two
Enden durch Befestigungsteile abgedichtet ist, über die der Luftfederbalg einerseits mit einem stationären Bauteil und andererseits mit einem abzufedernden Bauteil verbunden ist, wobei die Ausfederung bzw. dieEnds is sealed by fastening parts, via which the air bellows is connected on the one hand to a stationary component and on the other hand to a component to be cushioned, the rebound or the
Auszugshöhe durch ein mechanisches Sicherungsmittel begrenzt ist, d a d u r c h g e k e n n z e i c h n e t, daß die Befestigungsteile innerhalb des Luftfederbalges (11) über ein bandförmiges Mittel (41) miteinander flexibel verbunden sind, daß die maximal zulässige Ausfederung bzw. Auszugshöhe durch die maximal mögliche Streckung des b&ndförmigen Mittels (41) begrenzt ist.Pull-out height is limited by a mechanical securing means, characterized in that the fastening parts within the air bellows (11) are flexibly connected to one another via a band-shaped means (41), that the maximum permissible deflection or pull-out height is due to the maximum possible extension of the B-shaped means (41). is limited.
2. Luftfeder nach Anspruch 1 , dadurch gekennzeichnet, daß die Befestigungsteile (21 , 22) auf ihren zum Luftfederinnenraum gerichteten Flächen bügeiförmige Befestigungsansätze (36, 37, 39) aufweisen, an denen das bandförmige Mittel (41) befestigt ist.2. Air spring according to claim 1, characterized in that the fastening parts (21, 22) on their surfaces directed towards the air spring interior have bow-shaped fastening lugs (36, 37, 39) to which the band-shaped means (41) is fastened.
3. Luftfeder nach Anspruch 1 , dadurch gekennzeichnet, daß das bandförmige Mittel (41) mehrfach um die bügeiförmigen Befestigungsansätze (36, 37, 39) umgeschlagen ist und seine Enden zum Endlosmachen miteinander verbunden sind.3. Air spring according to claim 1, characterized in that the band-shaped means (41) is turned over several times around the bow-shaped attachment lugs (36, 37, 39) and its ends are connected to each other for making endless.
4. Luftfeder nach Anspruch 1 , dadurch gekennzeichnet, daß ein oder beide bügeiförmigen Befestigungsansätze (36, 37) federnd aufgehängt sind.4. Air spring according to claim 1, characterized in that one or both bow-shaped attachment lugs (36, 37) are resiliently suspended.
5. Luftfeder nach Anspruch 1 , dadurch gekennzeichnet, daß das bandförmige Mittel (41) eine eigene Federwirkung aufweist. 5. Air spring according to claim 1, characterized in that the band-shaped means (41) has its own spring action.
PCT/EP2001/005718 2000-06-10 2001-05-18 Pneumatic spring comprising an elastomeric pneumatic spring bellows for elastically supporting two parts that can move in relation to one another WO2001096129A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10028905.3 2000-06-10
DE2000128905 DE10028905A1 (en) 2000-06-10 2000-06-10 Rolling lobe air spring for mounting vehicle axle on its chassis has restricting ring fastened to stirrups attached to upper and lower mountings for spring, limiting its flexibility to maximum possible stretching of ring

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WO2001096129A1 true WO2001096129A1 (en) 2001-12-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112014002607B4 (en) 2013-05-28 2023-08-31 Firestone Industrial Products Company, Llc end member assemblies and limited travel assemblies and gas spring assemblies incorporating them

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB539597A (en) * 1940-05-15 1941-09-17 Daimler Co Ltd Improvements in or relating to spring suspension systems for motor vehicles
DE1146764B (en) * 1962-06-16 1963-04-04 Maschf Augsburg Nuernberg Ag Air spring for vehicles
US4573704A (en) * 1982-01-20 1986-03-04 Turner Quick-Lift Corporation Internal lift axle suspension system
US4786035A (en) * 1986-11-21 1988-11-22 The Firestone Tire & Rubber Company Airspring with internal restraint
DE4126998C2 (en) 1991-08-16 1994-07-07 Bergische Achsen Kotz Soehne Air suspension axle for off-road use
DE19539151A1 (en) * 1995-10-20 1997-04-24 Fichtel & Sachs Ag Vehicle pneumatic suspension element
DE19701605A1 (en) * 1997-01-17 1998-07-23 Bpw Bergische Achsen Kg Commercial vehicle axle air spring has internal travel-limiter made of polyamid

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB539597A (en) * 1940-05-15 1941-09-17 Daimler Co Ltd Improvements in or relating to spring suspension systems for motor vehicles
DE1146764B (en) * 1962-06-16 1963-04-04 Maschf Augsburg Nuernberg Ag Air spring for vehicles
US4573704A (en) * 1982-01-20 1986-03-04 Turner Quick-Lift Corporation Internal lift axle suspension system
US4786035A (en) * 1986-11-21 1988-11-22 The Firestone Tire & Rubber Company Airspring with internal restraint
DE4126998C2 (en) 1991-08-16 1994-07-07 Bergische Achsen Kotz Soehne Air suspension axle for off-road use
DE19539151A1 (en) * 1995-10-20 1997-04-24 Fichtel & Sachs Ag Vehicle pneumatic suspension element
DE19701605A1 (en) * 1997-01-17 1998-07-23 Bpw Bergische Achsen Kg Commercial vehicle axle air spring has internal travel-limiter made of polyamid

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