WO2000019068A1 - Mounting device for mounting a sensor in a chamber, especially in the engine compartment of an internal combustion engine - Google Patents

Mounting device for mounting a sensor in a chamber, especially in the engine compartment of an internal combustion engine Download PDF

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Publication number
WO2000019068A1
WO2000019068A1 PCT/CH1999/000408 CH9900408W WO0019068A1 WO 2000019068 A1 WO2000019068 A1 WO 2000019068A1 CH 9900408 W CH9900408 W CH 9900408W WO 0019068 A1 WO0019068 A1 WO 0019068A1
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WO
WIPO (PCT)
Prior art keywords
mounting
shells
mounting device
tube
mounting tube
Prior art date
Application number
PCT/CH1999/000408
Other languages
German (de)
French (fr)
Inventor
David Stedham
Original Assignee
Electrical Engineering Company Ltd.
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.)
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Publication date
Application filed by Electrical Engineering Company Ltd. filed Critical Electrical Engineering Company Ltd.
Priority to AU54042/99A priority Critical patent/AU5404299A/en
Publication of WO2000019068A1 publication Critical patent/WO2000019068A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices

Definitions

  • Mounting device for mounting a probe in a chamber, in particular in the Motorxatr of an internal combustion engine
  • the invention relates to an assembly device according to the preamble of claim 1.
  • the term probe is to be understood in the broadest sense here and can be used, for example, to record physical data such as temperature and pressure, but also to record atmospheric data, such as, in particular, the oil mist concentration in an engine compartment. and ultimately for taking samples from a chamber or also for venting them.
  • Mounting devices of the type mentioned at the outset are known, for example from WO 98/11331. It is disadvantageous that the assembly device cannot be attached from the outside of the chamber. A labyrinth device required to protect the probe must be attached to the mounting tube inside the chamber.
  • the purpose of the invention is to improve a mounting device of the type mentioned at the outset in such a way that it can be mounted from the outside of the chamber. According to the invention, this object is achieved by the characterizing features of claim 1.
  • the labyrinth device consists of shells made of elastic material arranged coaxially around the head part, the openings of which are offset from one another, the whole in such a way that the shells can be stretched in the longitudinal direction of the mounting tube, it is possible to reduce the shells in their outer diameter in such a way that that this corresponds essentially to the outer diameter of the mounting tube, so that the labyrinth device can be pushed through a corresponding hole in the wall of a chamber. After relaxing, the labyrinth device expands again and is available for attaching the probe.
  • the labyrinth device has at least two shells. But there can also be several.
  • the embodiment according to claim 2 with three shells is particularly advantageous.
  • the shells can have any shape, but rotationally symmetrical shapes are preferred.
  • the shells can be concentric spherical shells.
  • the onion-like design of the labyrinth device also favors the stretching of the labyrinth device in the longitudinal axis of the mounting tube.
  • the shells can form a free gap between them. According to claim 4, however, it is advantageous in the central plane transverse to the longitudinal axis of the mounting tube to connect shells with bendable wall parts that facilitate the expansion of the labyrinth device after installation.
  • the wall parts can also contribute to the removal of separated liquid particles.
  • the holes in the shells can have any shape.
  • An embodiment according to claim 5 is very particularly preferred, since the configuration as elongated holes which run in the longitudinal direction of the mounting tube make it easier to stretch the labyrinth device in the longitudinal direction of the tube.
  • a further development according to claim 6 is also expedient, which improves the removal of accumulating liquid in the labyrinth device.
  • a further development according to claim 7 is particularly advantageous for this.
  • An embodiment of the assembly device according to claim 8 is also expedient.
  • the passage opening arranged on the side facing away from the assembly tube can either facilitate the penetration of chamber atmosphere into the labyrinth seal or the probe can observe the chamber interior by means of a suitable measuring device through the passage opening, for example by means of optical means .
  • an embodiment according to claim 9 is advantageous.
  • a further advantageous embodiment of the mounting device results from claim 10, wherein the shells are connected to one another on the side facing away from the mounting tube and have a support flange for attaching a stretching tool.
  • a stretching tool can be an inserted probe, for example, which is supported on the support flanges and is used to stretch the labyrinth device in the longitudinal direction of the mounting tube.
  • Other suitable stretching tools are screwdrivers, pipe wrenches and the like.
  • the mounting tube can be designed in any way and fastened in a bore in a chamber.
  • the embodiment according to claim 11 is very particularly preferred, as a result of which the assembly of the assembly device is made considerably easier since there is no screw connection between the assembly tube and the wall of the chamber.
  • Figure 1 shows a mounting device on a
  • FIG. 1 shows the mounting device of Figure 1 in
  • FIGS 1 and 2 show a mounting device for mounting a probe 2 in a chamber 4 of an object, the interior of which requires special monitoring.
  • a chamber can be, for example, the housing of a transmission or, in particular, the interior of an internal combustion engine, as described, for example, in W098 / 11331.
  • the mounting device has a mounting tube 6 which is arranged in a bore 8 in a chamber wall 10 of the chamber 4.
  • the mounting tube 6 contains a head part 12, on which a labyrinth device 14 is arranged, which surrounds a probe 2, which is inserted through the mounting tube 6 into the labyrinth device 14.
  • the labyrinth device 14 is formed by at least two shells arranged coaxially around the head part 12 in the present example 3, specifically by an inner shell 18 which is surrounded by a middle shell 20, to which the outer shell 22 is connected on the outside.
  • the shells contain mutually offset openings 24, 26, 28 which are designed as elongated holes and extend practically over the entire length of the shells in the direction of the longitudinal axis 30 of the mounting tube 6.
  • the openings 24, 26, 28 are offset from one another from shell to shell, so that no direct connection between the atmosphere of the chamber 4 and the probe 2 is possible.
  • the labyrinth device is preferably designed in the manner of an onion, the shells 18, 20, 22 being connected to one another at the end 32 facing the head part 12 and at the opposite end 34 and each pointing outwards.
  • the openings 28 of the outer shell 24 are provided with outward-pointing deflection lips 36 in order to prevent any liquid that may strike the outer shell 22 from entering the opening 28.
  • an opening 28a of the outer shell 22 is arranged at the lowest point of the labyrinth device 14.
  • the shell part 20a of the middle shell 20, which lies above the lower opening 28a of the outer shell 22, is designed in such a way that no liquid can collect there, ie this shell part is at least horizontally or, if appropriate, curved inwards.
  • the shells 18, 20, 22 are fastened to the mounting end part 32 on the mounting tube 6, preferably vulcanized.
  • the free end part 34 of the labyrinth device 14 is preferably provided with a passage opening 28 which widens outwards.
  • the passage opening 38 is equipped with a support flange 40 which is suitable for attaching a stretching tool.
  • the probe 2 is supported on this support flange 40.
  • the shells 18, 20, 22 consist of elastic material, such as natural or artificial rubber, and are designed such that they can be tapered by longitudinal stretching in the direction of the longitudinal axis 30 of the mounting tube 6 in such a way that the outside diameter of the labyrinth device 14 essentially corresponds to the outside diameter corresponds to the mounting tube 6, so that the labyrinth device can be inserted into the chamber 4 from the outside through the bore 8 in the chamber wall 10 in the stretched state.
  • this can optionally be provided with wall parts 44 arranged in the central plane 42, which connects the shells 28, 22 in the manner of a membrane.
  • the wall part 44 must be bendable in such a way that the aforementioned stretching of the labyrinth device and the reduction in diameter to the outside diameter of the mounting tube is possible.
  • the mounting tube consists of a metallic inner tube 46, which has an external thread on the side facing away from the labyrinth device 14 48 is provided, on which a fastening nut 50 is screwed.
  • the latter is against the end face 52 of a jacket 54 surrounding the inner tube, which is made of elastic material in order to preload it radially against the inside of the bore 8 in the chamber wall 10 when it is fastened.
  • the inner tube is provided with circumferential ribs 56 which engage in a form-fitting manner in the surrounding jacket in order to prevent displacement of the jacket 54 relative to the inner tube 46 when the jacket 54 is compressed by means of the fastening nut 50.
  • the fastening nut 50 is also provided with a conical section 58 in order to center the mounting tube 6 in the bore 8.
  • the bore 8 is preferably also provided with a bevel 60.
  • the fastening nut 50 also contains an internal thread 62 into which a fastening screw of a probe 2 can be screwed in order to fix it in the assembly device.
  • the mounting device is particularly suitable for receiving an oil mist detector, which is only indicated by dashed lines, as is used for monitoring the engine compartment of an internal combustion engine.
  • the labyrinth seal 14 allows the oil mist atmosphere to penetrate into the probe 2, but prevents it from being contaminated by spray oil, as a result of which the measurement results of the oil mist detector are either falsified or even made impossible by contamination.
  • Other probes can also be used in the mounting device, which can be used, for example, to determine the temperature or pressure of the atmosphere in the chamber. Probes are also conceivable, which can be arranged in the mounting device for suction or for taking samples. LIST OF REFERENCE NUMBERS

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The inventive mounting device is provided with a mounting tube (6) to be fixed in a bore (8) of a chamber wall (10). Said mounting tube has a head part (12) which is connected to the chamber atmosphere and which is designed so as to accommodate a sensor (2) and a labyrinth device (14) enclosing the head part. Said labyrinth device contains at least two shells (18, 20, 24) which are coaxially arranged around the head part (12). Said shells are spaced apart from one another and are provided with openings (24, 26, 28, 28a), the openings of the two shells (18, 20, 22) being off-set from one another. The shells (18, 20, 22) are fixed to the mounting tube (6) and consist of an elastic material. The invention is designed in such a way that the shells (18, 20, 22) can be substantially reduced, in terms of their outer diameter, to the outer diameter of the mounting tube (6) by stretching them in the longitudinal direction of the mounting tube (6) so as to introduce the labyrinth device into the chamber (4) from the outside through the bore (8) and to fix it there.

Description

Montagevorrichtung zur Montage einer Sonde in einer Kammer, insbesondere im Motorxatr einer BrennkraftmaschineMounting device for mounting a probe in a chamber, in particular in the Motorxatr of an internal combustion engine
Technisches GebietTechnical field
Die Erfindung betrifft eine Montagevorrichtung gemäss Oberbegriff des Anspruches 1. Der Begriff Sonde ist hier im weitesten Sinne zu verstehen und kann beispielsweise zur Erfassung von physikalischen Daten wie Temperatur und Druck dienen, aber auch zur Erfassung atmosphärischer Daten, wie insbesondere der Ölnebelkonzentration in einem Motorraum, und letztlich zur Entnahme von Proben aus einer Kammer oder auch zum Entlüften derselben.The invention relates to an assembly device according to the preamble of claim 1. The term probe is to be understood in the broadest sense here and can be used, for example, to record physical data such as temperature and pressure, but also to record atmospheric data, such as, in particular, the oil mist concentration in an engine compartment. and ultimately for taking samples from a chamber or also for venting them.
Stand der TechnikState of the art
Montagevorrichtungen der eingangs genannten Art sind bekannt, so beispielsweise aus der WO 98/11331. Dabei ist es nachteilig, dass die Montagevorrichtung nicht von der Aussenseite der Kammer angesetzt werden kann. Eine zum Schutz der Sonde erforderliche Labyrinthvorrichtung muss innerhalb der Kammer am Montagerohr befestigt werden.Mounting devices of the type mentioned at the outset are known, for example from WO 98/11331. It is disadvantageous that the assembly device cannot be attached from the outside of the chamber. A labyrinth device required to protect the probe must be attached to the mounting tube inside the chamber.
Darstellung der ErfindungPresentation of the invention
Zweck der Erfindung ist es, eine Montagevorrichtung der eingangs genannten Art derart zu verbessern, dass sie von der Aussenseite der Kammer montierbar ist. Diese Aufgabe wird erfindungsgemäss gelöst durch die kennzeichnenden Merkmale des Anspruches 1.The purpose of the invention is to improve a mounting device of the type mentioned at the outset in such a way that it can be mounted from the outside of the chamber. According to the invention, this object is achieved by the characterizing features of claim 1.
Dadurch, dass die Labyrinthvorrichtung aus koaxial um den Kopfteil angeordneten Schalen aus elastischem Werkstoff besteht, deren Öffnungen gegeneinander versetzt sind, das Ganze derart, dass die Schalen in Längsrichtung des Montagerohres streckbar sind, ist es möglich, die Schalen in ihrem Aussendurchmesser derart zu reduzieren, dass dieser im wesentlichen dem Aussendurchmesser des Montagerohres entspricht, so dass die Labyrinthvorrichtung durch eine entsprechende Bohrung in der Wand einer Kammer durchgeschoben werden kann. Nach dem Entspannen dehnt sich die Labyrinthvorrichtung wieder aus und steht zur Anbringung der Sonde zur Verfügung.Because the labyrinth device consists of shells made of elastic material arranged coaxially around the head part, the openings of which are offset from one another, the whole in such a way that the shells can be stretched in the longitudinal direction of the mounting tube, it is possible to reduce the shells in their outer diameter in such a way that that this corresponds essentially to the outer diameter of the mounting tube, so that the labyrinth device can be pushed through a corresponding hole in the wall of a chamber. After relaxing, the labyrinth device expands again and is available for attaching the probe.
Vorteilhafte Ausgestaltungen sind in den Ansprüchen 2 bis 13 beschrieben.Advantageous embodiments are described in claims 2 to 13.
Die Labyrinthvorrichtung weist mindestens zwei Schalen auf. Es können aber auch mehrere sein. Besonders vorteilhaft ist die Ausgestaltung nach Anspruch 2 mit drei Schalen.The labyrinth device has at least two shells. But there can also be several. The embodiment according to claim 2 with three shells is particularly advantageous.
Grundsätzlich können die Schalen eine beliebige Form aufweisen, wobei jedoch rotationssymetrische Formen bevorzugt sind. Dabei können die Schalen konzentrische Kugelschalen sein. Besonders bevorzugt ist jedoch die Ausbildung der Labyrinthvorrichtung nach Anspruch 3 nach Art einer Zwiebel. In letzterem Fall laufen die Schalen an der Längsachse des Montagerohres an gegenüberliegenden Seiten nach aussen gerichtet zusammen, wodurch beispielsweise eine gemeinsame Befestigung am Montagerohr erleichtert wird. Die zwiebelartige Ausbildung der Labyrinthvorrichtung begünstigt auch das Strecken der Labyrinthvorrichtung in der Längsachse des Montagerohres.Basically, the shells can have any shape, but rotationally symmetrical shapes are preferred. The shells can be concentric spherical shells. However, it is particularly preferred to design the labyrinth device according to claim 3 in the manner of an onion. In the latter case, the shells converge on the longitudinal axis of the mounting tube on opposite sides facing outward, which, for example, facilitates joint attachment to the mounting tube. The onion-like design of the labyrinth device also favors the stretching of the labyrinth device in the longitudinal axis of the mounting tube.
Grundsätzlich können die Schalen einen freien Spalt zwischen sich bilden. Gemäss Anspruch 4 ist es jedoch vorteilhaft, in der Mittelebene quer zur Längsachse des Montagerohres die Schalen durch biegbare Wandteile miteinander zu verbinden, die das Expandieren der Labyrinthvorrichtung nach dem Einbau erleichtern. Auch können die Wandteile zum Abführen abgeschiedener Flüssigkeitsteilchen beitragen.Basically, the shells can form a free gap between them. According to claim 4, however, it is advantageous in the central plane transverse to the longitudinal axis of the mounting tube To connect shells with bendable wall parts that facilitate the expansion of the labyrinth device after installation. The wall parts can also contribute to the removal of separated liquid particles.
Grundsätzlich können die Löcher in den Schalen beliebige Formen aufweisen. Ganz besonders bevorzugt ist eine Ausbildung nach Anspruch 5, da die Ausgestaltung als Langlöcher, welche in Längsrichtung des Montagerohres verlaufen, das Strecken der Labyrinthvorrichtung in Längsrichtung des Rohres erleichtern.Basically, the holes in the shells can have any shape. An embodiment according to claim 5 is very particularly preferred, since the configuration as elongated holes which run in the longitudinal direction of the mounting tube make it easier to stretch the labyrinth device in the longitudinal direction of the tube.
Zweckmässig ist auch eine Weiterbildung nach Anspruch 6, die das Abführen von sich ansammelnder Flüssigkeit in der Labyrinthvorrichtung verbessert. Hierzu ist insbesondere eine Weiterbildung nach Anspruch 7 vorteilhaft.A further development according to claim 6 is also expedient, which improves the removal of accumulating liquid in the labyrinth device. A further development according to claim 7 is particularly advantageous for this.
Zweckmässig ist auch eine Ausgestaltung der Montagevorrichtung nach Anspruch 8. Durch die auf der dem Montagerohr abgewandten Seite angeordnete Durchtrittsöffnung kann entweder das Eindringen von Kammeratmosphäre in die Labyrinthdichtung erleichtert werden oder die Sonde kann mittels einer geeigneten Messvorrichtung durch die Durchtrittsöffnung den Kammerinnenraum beispielsweise mittels optischer Mittel beobachten.An embodiment of the assembly device according to claim 8 is also expedient. The passage opening arranged on the side facing away from the assembly tube can either facilitate the penetration of chamber atmosphere into the labyrinth seal or the probe can observe the chamber interior by means of a suitable measuring device through the passage opening, for example by means of optical means .
Um das Eindringen von Spritzflüssigkeit in die Labyrinthvorrichtung weitgehend zu verhindern, ist eine Ausgestaltung nach Anspruch 9 von Vorteil.In order to largely prevent the penetration of spray liquid into the labyrinth device, an embodiment according to claim 9 is advantageous.
Eine weitere vorteilhafte Ausgestaltung der Montagevorrichtung ergibt sich nach Anspruch 10, wobei die Schalen auf der dem Montagerohr abgewandten Seite miteinander verbunden sind und einen Stützflansch zum Ansetzen eines Streckwerkzeuges aufweisen. Ein solches Streckwerkzeug kann beispielsweise eine eingesetzte Sonde sein, die sich an den Stützflanschen abstützt und zum Strecken der Labyrinthvorrichtung in Längsrichtung des Montagerohres dient. Andere geeignete Streckwerkzeuge sind Schraubenzieher, Rohrschlüssel und dergleichen. Das Montagerohr kann beliebig ausgestaltet und in einer Bohrung einer Kammer befestigt werden. Ganz besonders bevorzugt ist jedoch die Ausbildung nach Anspruch 11, wodurch die Montage der Montagevorrichtung wesentlich erleichtert wird, da keine Schraubverbindung zwischen dem Montagerohr und der Wandung der Kammer gegeben ist. Allein durch die Presswirkung des Mantels zwischen dem metallischen Innenrohr und der Innenseite der Bohrung wird eine ausreichende und dichte Verbindung der Montagevorrichtung mit der Kammerwand erzielt. Als weitere Vorteile ergeben sich, dass die Montagevorrichtung gegenüber dem Inneren der Montagevorrichtung elektrische und oder thermisch isoliert ist, was für bestimmte Mess- und Beobachtungsvorgänge von Vorteil sein kann. Damit die Verbindung zwischen Innenrohr und Mantel auch beim Expandieren des Mantels mit der Befestigungsmutter nicht verändert wird, ist eine Ausgestaltung nach Anspruch 12 von Vorteil.A further advantageous embodiment of the mounting device results from claim 10, wherein the shells are connected to one another on the side facing away from the mounting tube and have a support flange for attaching a stretching tool. Such a stretching tool can be an inserted probe, for example, which is supported on the support flanges and is used to stretch the labyrinth device in the longitudinal direction of the mounting tube. Other suitable stretching tools are screwdrivers, pipe wrenches and the like. The mounting tube can be designed in any way and fastened in a bore in a chamber. However, the embodiment according to claim 11 is very particularly preferred, as a result of which the assembly of the assembly device is made considerably easier since there is no screw connection between the assembly tube and the wall of the chamber. The press action of the jacket between the metallic inner tube and the inside of the bore alone achieves a sufficient and tight connection of the mounting device to the chamber wall. Further advantages result from the fact that the assembly device is electrically and or thermally insulated from the interior of the assembly device, which can be advantageous for certain measurement and observation processes. In order that the connection between the inner tube and the jacket is not changed even when the jacket is expanded with the fastening nut, an embodiment according to claim 12 is advantageous.
Zur genauen Ausrichtung der Montagevorrichtung innerhalb der Bohrung ist eine Ausgestaltung der Montagevorrichtung nach Anspruch 13 empfehlenswert.For precise alignment of the mounting device within the bore, a configuration of the mounting device according to claim 13 is recommended.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnungen näher beschrieben, dabei zeigen:Exemplary embodiments of the invention are described in more detail below with reference to the drawings, in which:
Figur 1 eine Montagevorrichtung an einerFigure 1 shows a mounting device on a
Kammerwand im Längsschnitt; undChamber wall in longitudinal section; and
Figur 2 die Montagevorrichtung der Figur 1 imFigure 2 shows the mounting device of Figure 1 in
Schnitt II-II der Figur 1. Wege zur Ausführung der ErfindungSection II-II of Figure 1. Ways of Carrying Out the Invention
Die Figuren 1 und 2 zeigen eine Montagevorrichtung zur Montage einer Sonde 2 in einer Kammer 4 eines Ojektes, dessen Innenraum einer besonderen Überwachung bedarf. Eine solche Kammer kann beispielweise das Gehäuse eines Getriebes oder insbesondere der Innenraum einer Brennkraftmaschine sein, wie dies beispielsweise in der W098/11331 beschrieben ist. Die Montagevorrichtung weist ein Montagerohr 6 auf, das in einer Bohrung 8 einer Kammerwand 10 der Kammer 4 angeordnet ist. Auf der Innenseite der Kammer 4 enthält das Montagerohr 6 einen Kopfteil 12, an dem eine Labyrinthvorrichtung 14 angeordnet ist, welche eine Sonde 2 umgibt, die durch das Montagerohr 6 in die Labyrinthvorrichtung 14 eingesetzt ist.Figures 1 and 2 show a mounting device for mounting a probe 2 in a chamber 4 of an object, the interior of which requires special monitoring. Such a chamber can be, for example, the housing of a transmission or, in particular, the interior of an internal combustion engine, as described, for example, in W098 / 11331. The mounting device has a mounting tube 6 which is arranged in a bore 8 in a chamber wall 10 of the chamber 4. On the inside of the chamber 4, the mounting tube 6 contains a head part 12, on which a labyrinth device 14 is arranged, which surrounds a probe 2, which is inserted through the mounting tube 6 into the labyrinth device 14.
Die Labyrinthvorrichtung 14 wird gebildet durch mindestens zwei im vorliegenden Beispiel 3 koaxial um den Kopfteil 12 angeordnete Schalen und zwar durch eine innere Schale 18, die von einer mittleren Schale 20 umgeben ist, an die sich nach aussen die äussere Schale 22 anschliesst. Die Schalen enthalten gegeneinander versetzte Öffnungen 24,26,28 die als Langlöcher ausgebildet sind und sich praktisch über die ganze Länge der Schalen in Richtung der Längsachse 30 des Montagerohres 6 erstrecken. Die Öffnungen 24,26,28 sind von Schale zu Schale gegeneinander versetzt, so dass keine direkte Verbindung zwischen der Atmosphäre der Kammer 4 und der Sonde 2 möglich ist. Die Labyrinthvorrichtung ist vorzugsweise nach Art einer Zwiebel ausgebildet, wobei die Schalen 18,20,22 an dem dem Kopfteil 12 zugewandten Ende 32 und an dem gegenüberliegenden Ende 34 miteinander verbunden sind und jeweils nach aussen weisen.The labyrinth device 14 is formed by at least two shells arranged coaxially around the head part 12 in the present example 3, specifically by an inner shell 18 which is surrounded by a middle shell 20, to which the outer shell 22 is connected on the outside. The shells contain mutually offset openings 24, 26, 28 which are designed as elongated holes and extend practically over the entire length of the shells in the direction of the longitudinal axis 30 of the mounting tube 6. The openings 24, 26, 28 are offset from one another from shell to shell, so that no direct connection between the atmosphere of the chamber 4 and the probe 2 is possible. The labyrinth device is preferably designed in the manner of an onion, the shells 18, 20, 22 being connected to one another at the end 32 facing the head part 12 and at the opposite end 34 and each pointing outwards.
Die Öffnungen 28 der äusseren Schale 24 sind mit nach aussen weisenden Abweislippen 36 versehen, um zu verhindern, dass allfällig auf die äussere Schale 22 auftreffende Flüssigkeit in die Öffnung 28 gelangt. Um das AbfHessen von etwaiger, in die Labyrinthvorrichtung 14 gelangter Flüssigkeit zu ermögli- chen, ist eine Öffnung 28a der äusseren Schale 22 an der untersten Stelle der Labyrinthvorrichtung 14 angeordnet. Der Schalenteil 20a der mittleren Schale 20, der über der unteren Öffnung 28a der äusseren Schale 22 liegt ist so ausgebildet, dass sich dort keine Flüssigkeit sammeln kann, d.h. dieser Schalenteil ist mindestens waagrecht oder gegebenenfalls nach innen gekrümmt ausgebildet.The openings 28 of the outer shell 24 are provided with outward-pointing deflection lips 36 in order to prevent any liquid that may strike the outer shell 22 from entering the opening 28. In order to enable the measurement of any liquid that has entered the labyrinth device 14, Chen, an opening 28a of the outer shell 22 is arranged at the lowest point of the labyrinth device 14. The shell part 20a of the middle shell 20, which lies above the lower opening 28a of the outer shell 22, is designed in such a way that no liquid can collect there, ie this shell part is at least horizontally or, if appropriate, curved inwards.
Die Schalen 18,20,22 sind am Befestigungsendteil 32 am Montagerohr 6 befestigt, vorzugsweise anvulkanisiert. Der freie Endteil 34 der Labyrinthvorrichtung 14 ist vorzugsweise mit einer Durchtrittsöffnung 28 versehen, die sich nach aussen erweitert. Auf der Innenseite ist die Durchtrittsöffnung 38 mit einem Stützflansch 40 ausgestattet, der zum Ansetzen eines Streckwerkzeuges geeignet ist. Im vorliegenden Fall stützt sich die Sonde 2 an diesem Stützflansch 40 ab.The shells 18, 20, 22 are fastened to the mounting end part 32 on the mounting tube 6, preferably vulcanized. The free end part 34 of the labyrinth device 14 is preferably provided with a passage opening 28 which widens outwards. On the inside, the passage opening 38 is equipped with a support flange 40 which is suitable for attaching a stretching tool. In the present case, the probe 2 is supported on this support flange 40.
Die Labyrinthvorrichtung 14, d.h. die Schalen 18,20,22 bestehen aus elastischem Werkstoff, wie beispielsweise natürlichem oder künstlichem Kautschuk und sind derart ausgebildet, dass sie durch Längsstreckung in Richtung der Längsachse 30 des Montagerohres 6 derart verjüngt werden können, dass der Aussendurchmesser der Labyrinthvorrichtung 14 im wesentlichen dem Aussendurchmesser des Montagerohres 6 entspricht, so dass die Labyrinthvorrichtung in gestrecktem Zustand durch die Bohrung 8 in der Kammerwand 10 von Aussen in die Kammer 4 eingeführt werden kann. Zur Stabilisierung der Labyrinthvorrichtung kann diese gegebenenfalls mit in der Mittelebene 42 angeordneten Wandteilen 44 versehen sein, der die Schalen 28,22 membranartig verbindet. Der Wandteil 44 muss allerdings derart biegbar sein, dass die vorher erwähnte Streckung der Labyrinthvorrichtung und die Durchmesserverringerung auf den Aussendurchmesser des Montagerohres möglich ist.The labyrinth device 14, i.e. The shells 18, 20, 22 consist of elastic material, such as natural or artificial rubber, and are designed such that they can be tapered by longitudinal stretching in the direction of the longitudinal axis 30 of the mounting tube 6 in such a way that the outside diameter of the labyrinth device 14 essentially corresponds to the outside diameter corresponds to the mounting tube 6, so that the labyrinth device can be inserted into the chamber 4 from the outside through the bore 8 in the chamber wall 10 in the stretched state. To stabilize the labyrinth device, this can optionally be provided with wall parts 44 arranged in the central plane 42, which connects the shells 28, 22 in the manner of a membrane. However, the wall part 44 must be bendable in such a way that the aforementioned stretching of the labyrinth device and the reduction in diameter to the outside diameter of the mounting tube is possible.
Das Montagerohr besteht im vorliegenden Ausführungsbeispiel aus einem metallischen Innenrohr 46, das auf der der Labyrinthvorrichtung 14 abgewandten Seite mit einem Aussengewinde 48 versehen ist, auf dem eine Befestigungsmutter 50 aufgeschraubt ist. Letztere steht gegen die Stirnseite 52 eines das Innenrohr umgebenden Mantels 54 an, der aus elastischem Werkstoff besteht, um diesen beim Befestigen radial gegen die Innenseite der Bohrung 8 in der Kammerwand 10 vorzuspannen. Das Innenrohr ist mit umlaufenden Rippen 56 versehen, die in den umgebenden Mantel formschlüssig eingreifen, um ein Verschieben des Mantels 54 relativ zum Innenrohr 46 beim Komprimieren des Mantels 54 mittels der Befestigungsmutter 50 zu verhindern. Die Befestigungsmutter 50 ist überdies mit einem konischen Abschnitt 58 versehen, um das Montagerohr 6 in der Bohrung 8 zu zentrieren. Hierzu ist die Bohrung 8 vorzugsweise ebenfalls mit einer Abschrägung 60 ausgestattet. Die Befestigungsmutter 50 enthält überdies ein Innengewinde 62, in das eine Befestigungsschraube einer Sonde 2 eingeschraubt werden kann, um diese in der Montagevorrichtung zu fixieren.In the present exemplary embodiment, the mounting tube consists of a metallic inner tube 46, which has an external thread on the side facing away from the labyrinth device 14 48 is provided, on which a fastening nut 50 is screwed. The latter is against the end face 52 of a jacket 54 surrounding the inner tube, which is made of elastic material in order to preload it radially against the inside of the bore 8 in the chamber wall 10 when it is fastened. The inner tube is provided with circumferential ribs 56 which engage in a form-fitting manner in the surrounding jacket in order to prevent displacement of the jacket 54 relative to the inner tube 46 when the jacket 54 is compressed by means of the fastening nut 50. The fastening nut 50 is also provided with a conical section 58 in order to center the mounting tube 6 in the bore 8. For this purpose, the bore 8 is preferably also provided with a bevel 60. The fastening nut 50 also contains an internal thread 62 into which a fastening screw of a probe 2 can be screwed in order to fix it in the assembly device.
Die Montagevorrichtung ist insbesondere zur Aufnahme eines nur gestrichelt angedeuteten Ölnebeldetektors geeignet, wie er zur Überwachung des Motorraumes einer Brennkraftmaschine zum Einsatz kommt. Die Labyrinthdichtung 14 gestattet zwar das Eindringen der Ölnebelatmosphäre zu Sonde 2, verhindert aber, dass diese durch Spritzöl verschmutzt wird, wodurch die Messergebnisse des Ölnebeldetektors entweder verfälscht oder durch Verschmutzung gar verunmöglicht würden. In die Montagevorrichtung lassen sich auch andere Sonden einsetzen, die beispielsweise zur Temperatur- oder Druckermittlung der Atmosphäre in der Kammer dienen können. Es sind auch Sonden denkbar, die zum Absaugen oder zur Probenentnahme in der Montagevorrichtung angeordnet sein können. BEZUGSZEICHENLISTEThe mounting device is particularly suitable for receiving an oil mist detector, which is only indicated by dashed lines, as is used for monitoring the engine compartment of an internal combustion engine. The labyrinth seal 14 allows the oil mist atmosphere to penetrate into the probe 2, but prevents it from being contaminated by spray oil, as a result of which the measurement results of the oil mist detector are either falsified or even made impossible by contamination. Other probes can also be used in the mounting device, which can be used, for example, to determine the temperature or pressure of the atmosphere in the chamber. Probes are also conceivable, which can be arranged in the mounting device for suction or for taking samples. LIST OF REFERENCE NUMBERS
2 Sonde2 probe
4 Kammer4 chamber
6 Montagerohr6 mounting tube
8 Bohrung8 hole
10 Kammerwand10 chamber wall
12 Kopfteil12 headboard
14 Labyrinthvorrichtung14 labyrinth device
18 Schale innen18 bowl inside
20 Schale mitte20 bowl in the middle
20a Schalenteil20a shell part
22 Schale aussen22 shell outside
24 Öffnung innen24 opening inside
26 Öffnung mitte26 opening in the middle
28 Öffnung aussen28 Outside opening
28a Öffnung aussen28a outside opening
30 Längsachse30 longitudinal axis
32 Befestigungsendteil32 fastening end part
34 Endteil, frei34 end part, free
36 Abweislippe36 deflector lip
38 Durchtrittsöffnung38 passage opening
40 Stützflansch40 support flange
42 Mittelebene42 middle level
44 Wandteil44 wall part
46 metallisches Innenrohr46 metallic inner tube
48 Aussengewinde48 external thread
50 Befestigungsmutter50 fastening nut
52 Stirnseite52 end face
54 Mantel54 coat
56 Rippe56 rib
58 konischer Abschnitt58 conical section
60 Abschrägung60 bevel
62 Innengewinde 62 internal thread

Claims

PA EHT-ftNSPRUCHEPA EHT-SPNSPRUCHE
Montagevorrichtung zur Montage einer Sonde in einer Kammer, insbesondere im Motorraum einer Brennkraftmaschine, mit einem Montagerohr ( 6 ) , das ein mit der Kammeratmosphäre in Verbindung stehenden Kopfteil (12) zur Aufnahme der Sonde (2) und eine den Kopfteil umgebende Labyrinthvorrichtung (14) aufweist, dadurch gekennzeichnet, dass die Labyrinthvorrichtung (14) mindestens zwei koaxial um den Kopfteil (12) angeordnete Schalen (18,20,24) aufweist, die einen gegenseitigen Abstand sowie Öffnungen (24,26,28,28a) aufweisen, wobei die Öffnungen der Schalen (18,20,22) gegeneinander versetzt sind, wobei weiter die Schalen (18,20,22) am Montagerohr (6) befestigt sind und aus elastischem Werkstoff bestehen, das Ganze derart, dass die Schalen (18,20,22) durch Strecken in Längsrichtung des Montagerohres (6) in ihrem Aussendurchmesser im wesentlichen auf den Aussendurchmesser des Montagerohres (6) reduziert werden können.Mounting device for mounting a probe in a chamber, in particular in the engine compartment of an internal combustion engine, with a mounting tube (6) which has a head part (12) in connection with the chamber atmosphere for receiving the probe (2) and a labyrinth device (14) surrounding the head part characterized in that the labyrinth device (14) has at least two shells (18, 20, 24) arranged coaxially around the head part (12), which have a mutual spacing and openings (24, 26, 28, 28a), the Openings of the shells (18, 20, 22) are offset from one another, the shells (18, 20, 22) being fastened to the mounting tube (6) and made of elastic material, the whole in such a way that the shells (18, 20, 22) can be reduced by stretching in the longitudinal direction of the mounting tube (6) in its outer diameter substantially to the outer diameter of the mounting tube (6).
2. Montagevorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie mindestens 3 Schalen (18,20,22) aufweist.2. Mounting device according to claim 1, characterized in that it has at least 3 shells (18, 20, 22).
3. Montagevorrichtung nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass die Labyrinthvorrichtung (14) nach Art einer Zwiebel ausgebildet ist.3. Mounting device according to claim 1 or 2, characterized in that the labyrinth device (14) is designed in the manner of an onion.
4. Montagevorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schalen (18,20,22) in der Mittelebene quer zur Längsachse (30) des Montagerohres (6) durch biegbare Wandteile (44) miteinander verbunden sind. 4. Mounting device according to one of claims 1 to 3, characterized in that the shells (18,20,22) in the central plane transverse to the longitudinal axis (30) of the mounting tube (6) are connected to each other by bendable wall parts (44).
5. Montagevorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Öffnungen (24,26,28,28a) als in der Längsachse (30) des Montagerohres (6) verlaufende Langlöcher ausgebildet sind.5. Mounting device according to one of claims 1 to 4, characterized in that the openings (24,26,28,28a) are formed as elongated holes in the longitudinal axis (30) of the mounting tube (6).
6. Montagevorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Öffnungen (24,26,28,28a) der Schalen (18,20,22) derart angeordnet und ausgebildet sind, dass sich etwaige innerhalb der Schalen (18,20,22) ansammelnde Flüssigkeit nach unten ausläuft.6. Mounting device according to one of claims 1 to 5, characterized in that the openings (24, 26, 28, 28a) of the shells (18, 20, 22) are arranged and designed such that any within the shells (18, 20,22) accumulating liquid runs down.
Montagevorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass eine Öffnung (28a) der äusseren Schale (22) an unterster Stelle der Schale angeordnet ist und der die Öffnung abdeckende Schalenteil (20a) der darüber liegenden Schale (20) flach oder nach innen gekrümmt ausgebildet ist.Mounting device according to claim 6, characterized in that an opening (28a) of the outer shell (22) is arranged at the lowest point of the shell and the shell part (20a) covering the opening of the shell (20) above is flat or curved inwards .
8. Montagevorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Schalen (18,20,22) auf der dem Montagerohr (6) abgewandten Seite miteinander verbunden sind und eine Durchtrittsöffnung (38) aufweisen.8. Mounting device according to one of claims 1 to 7, characterized in that the shells (18, 20, 22) are connected to one another on the side facing away from the mounting tube (6) and have a passage opening (38).
9. Montagevorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Öffnungen (28,28a) der äusseren Schale (22) jeweils mit einer die Öffnung umgebenden nach aussen weisenden Abweislippe (36) versehen sind. 9. Mounting device according to one of claims 1 to 8, characterized in that the openings (28, 28a) of the outer shell (22) are each provided with an outwardly facing deflection lip (36) surrounding the opening.
10. Montagevorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Schalen (18,20,22) auf der dem Montagerohr (6) abgewandten Seite miteinander verbunden sind und einen Stützflansch (40) zum Ansetzen eines Streckwerkzeuges aufweisen.10. Mounting device according to one of claims 1 to 9, characterized in that the shells (18, 20, 22) are connected to one another on the side facing away from the mounting tube (6) and have a support flange (40) for attaching a stretching tool.
11. Montagevorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Montagerohr (6) ein metallisches Innenrohr (46) enthält, das auf der der Labyrinthvorrichtung (14) abgewandten Seite ein Aussengewinde (48) mit einer aufgeschraubten Befestigungsmutter (50) aufweist, die gegen die Stirnseite (52) eines das Innenrohr (46) umgebenden Mantels (54) aus elastischem Werkstoff wirkt, um diesen radial gegen die Innenseite einer Bohrung (8) der Kammerwand (10) zu pressen.11. Mounting device according to one of claims 1 to 10, characterized in that the mounting tube (6) contains a metallic inner tube (46) which on the side facing away from the labyrinth device (14) has an external thread (48) with a screwed-on fastening nut (50) which acts against the end face (52) of a jacket (54) surrounding the inner tube (46) made of elastic material in order to press it radially against the inside of a bore (8) in the chamber wall (10).
12. Montagevorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass das Innenrohr (46) mit dem umgebenden Mantel (54) formschlüssig vorzugsweise verzahnt ist.12. Mounting device according to claim 11, characterized in that the inner tube (46) with the surrounding jacket (54) is preferably positively toothed.
13. Montagevorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass die Befestigungsmutter (50) eine zum Zentrieren des Montagerohres (6) in einer Bohrung (8) dienenden konischen Abschnitt (58) aufweist. 13. Mounting device according to claim 11, characterized in that the fastening nut (50) has a conical section (58) serving to center the mounting tube (6) in a bore (8).
PCT/CH1999/000408 1998-09-24 1999-09-03 Mounting device for mounting a sensor in a chamber, especially in the engine compartment of an internal combustion engine WO2000019068A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54042/99A AU5404299A (en) 1998-09-24 1999-09-03 Mounting device for mounting a sensor in a chamber, especially in the engine compartment of an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH194798 1998-09-24
CH1947/98 1998-09-24

Publications (1)

Publication Number Publication Date
WO2000019068A1 true WO2000019068A1 (en) 2000-04-06

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249082A (en) * 1977-09-20 1981-02-03 Cybernet Electronics Corporation Photoelectric smoke sensor box
GB2166232A (en) * 1984-10-10 1986-04-30 Lee Dickens Limited Monitoring oil mist level
US4666019A (en) * 1984-09-24 1987-05-19 Schaller-Automation Industrielle Automationstechnik Kg Device for monitoring lubrication in large diesel engines
GB2309076A (en) * 1996-01-10 1997-07-16 Kidde Fire Protection Ltd Detecting and separating particles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249082A (en) * 1977-09-20 1981-02-03 Cybernet Electronics Corporation Photoelectric smoke sensor box
US4666019A (en) * 1984-09-24 1987-05-19 Schaller-Automation Industrielle Automationstechnik Kg Device for monitoring lubrication in large diesel engines
GB2166232A (en) * 1984-10-10 1986-04-30 Lee Dickens Limited Monitoring oil mist level
GB2309076A (en) * 1996-01-10 1997-07-16 Kidde Fire Protection Ltd Detecting and separating particles

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