WO1997015974A2 - Dispositif d'etancheification d'un passe-cable - Google Patents

Dispositif d'etancheification d'un passe-cable Download PDF

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Publication number
WO1997015974A2
WO1997015974A2 PCT/DE1996/001890 DE9601890W WO9715974A2 WO 1997015974 A2 WO1997015974 A2 WO 1997015974A2 DE 9601890 W DE9601890 W DE 9601890W WO 9715974 A2 WO9715974 A2 WO 9715974A2
Authority
WO
WIPO (PCT)
Prior art keywords
cable
insulation jacket
grommet body
grommet
arrangement
Prior art date
Application number
PCT/DE1996/001890
Other languages
German (de)
English (en)
Other versions
WO1997015974A3 (fr
Inventor
Johann Wehrmann
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1997015974A2 publication Critical patent/WO1997015974A2/fr
Publication of WO1997015974A3 publication Critical patent/WO1997015974A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/0207—Wire harnesses
    • B60R16/0215—Protecting, fastening and routing means therefor
    • B60R16/0222—Grommets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/4062—Electrical connectors associated therewith
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • G01N27/4078—Means for sealing the sensor element in a housing

Definitions

  • the invention relates to an arrangement for sealing a cable bushing in a housing, in particular a lambda probe according to the preamble of claim 1, and a method for its production.
  • DE 319 486 discloses such a cable bushing, in which an elastic sealing tube is pushed over the insulating jacket of the cable.
  • a longitudinal shaping of the elastic sealing hose is achieved by a sophisticated shaping of a further sealing element in interaction with a union sleeve, which are pushed onto one another and anchored to one another via locking means.
  • This longitudinal deformation seals the insulation jacket of the cable from the sealing body.
  • the aforementioned cable entry is very complex because different components have to be manufactured and assembled during assembly. Accordingly, this effort is reflected in the manufacturing costs.
  • DE 41 26 378 discloses a cable bushing in which the connection points of contact parts and connecting conductors are each closely enclosed in a through hole of an elastic plug-like molded part.
  • the elastic plug-like molded part is made of a heat-resistant material, e.g. made of PTFE. This molded part is surrounded by a connection-side longitudinal section of a metal sleeve and pressed together, which is both a seal between the
  • PTFE in particular expands when heated, this expansion preferably taking place in the longitudinal direction of this sleeve due to the surrounding metal sleeves. With subsequent cooling, this linear expansion is retained because PTFE is only slightly elastic. This can result in leaks between the cable and the molded part when the insulation jacket of the cable is pulled together.
  • the object of the invention is therefore to propose an arrangement that can be manufactured with reasonable effort and thereby ensures a permanent and reliable seal.
  • cable grommet in an arrangement according to the invention (hereinafter referred to as cable grommet) with a grommet body, which is penetrated by a cable consisting of an electrically conductive core and an insulation jacket, the grommet body and the insulation jacket of the cable are firmly connected to one another over the entire circumference of the insulation jacket.
  • the movements of the materials of the insulation jacket or the sleeve body are not only coupled with each other during the heating, but also in the cooling phase. Therefore, a positive connection between the insulation jacket and the sleeve body is guaranteed even during the cooling phase.
  • connection between the insulation jacket and the sleeve body is produced by fusing or at least by fusing the materials on both sides.
  • a high level of adhesion between the insulation jacket and the sleeve body can be produced, which is sufficient to ensure the required tightness of the cable sleeve in the long term.
  • a fusion of the materials on both sides is achieved in the transition area, whereby the two components as a whole fuse to form a uniform and accordingly dense structural unit.
  • connection can also be made by gluing. If a suitable adhesive is available, a permanent and all-round positive connection between the insulation jacket and the sleeve body can also be brought about by such an adhesive connection.
  • the insulation jacket and the sleeve body are at least partially made of the same material. With such a choice of material, melting or fusing of the two components is generally easier to accomplish.
  • the insulation jacket and / or sleeve body are at least partially made of Teflon (PTFE). This material offers the advantage of high temperature resistance and high sealing capacity.
  • PTFE Teflon
  • At least partially glass fiber-filled Teflon is used as the manufacturing material for the grommet body.
  • the grommet body can better meet the mechanical requirements placed on it, an inhomogeneous glass fiber filling possibly also being conceivable, so that pure PTFE is present in the region of the interfaces between the insulating jacket and grommet body.
  • an interlocking connection according to the invention can also be produced directly between pure Teflon and glass fiber-filled Teflon.
  • a cable grommet according to the invention can advantageously be produced by heating the cable and thus its insulation jacket after insertion through a corresponding passage in the grommet body. Such heating causes the materials on both sides to melt or fuse, so that the desired all-round positive connection results.
  • the heating is called ⁇ advantageously in a temperature range above 300 C, preferably at about 370 ° C.
  • the heating is advantageously carried out under pressure. This has the advantage that larger tolerances are permissible when dimensioning the cable opening in the sleeve body.
  • the manufacture of the grommet body is less complex and, on the other hand, the measuring cable can be threaded through the grommet body more easily. If the grommet body is then pressurized, it fits positively on the insulation jacket of the cable, so that the desired positive connection can then be made, for example by heating.
  • the thermal expansion of the sleeve body and / or the threaded measuring cable is used to generate the pressure which is advantageous for establishing the connection between the sleeve body and the insulation jacket.
  • the grommet body with a threaded measuring cable is at least partially positively enclosed by a pressure element before heating.
  • the pressure element is designed so that its thermal expansion is less than that of the sleeve body or the measuring cable. If a grommet body clamped in this way is heated together with the measuring cable, a gap that may exist between the two components to be connected initially closes due to the material expansion. This results in the necessary positive locking of the connection when the interfaces are further melted or melted.
  • the pressure element can be provided as a sleeve with open end faces, so that the sleeve body can deform in the axial direction with respect to the pressure element due to the thermal expansion due to the further expansion of pressure. In this way, the pressure exerted on the cable in the area of the connection remains limited.
  • the heating of the grommet body and the measuring cable for producing the fixed and positive connection according to the invention can be carried out in a known manner in an oven, for example in a continuous oven. However, it would also be conceivable to directly heat the pressure element that at least partially surrounds the sleeve body.
  • the heating of the pressure element can be carried out via an electric heater, the pressure element itself advantageously being made electrically conductive, so that the heating currents can flow directly through the pressure element.
  • Such a heating current can be generated, for example, by direct conductor contacts or else by induction coils.
  • the single figure shows a section through a cable grommet according to the invention in the installed state in a lambda probe.
  • connection side 1 of a lambda probe comprises a partially shown metal sleeve 2 in which the grommet body 3 is located.
  • Two connecting cables 4, 5 pass through the grommet body 3 and are provided with crimp contacts 6, 7 at their lower end.
  • the grommet body 3 is caulked in the metal sleeve 2, which is why the metal sleeve 2 has an annular bulge 8 and the grommet body 3 has an annular bulge 9 which fits into the bulge 8 and comprises a groove 10.
  • An O-ring 11 is inserted into the groove 10.
  • the insulation jackets 12, 13 of the connecting cables 4, 5 are positively on the grommet body 3 and are firmly connected to this.
  • the sleeve body 13 which preferably consists of glass fiber filled Teflon (PTFE)
  • PTFE glass fiber filled Teflon
  • the grommet body 3 does not return completely to its original shape, so that under certain circumstances a leak can form between the grommet body 3 and the metal sleeve 2.
  • the groove 10 is provided with the Viton O-ring 11 on the inside. The O-ring 11 is able to permanently seal the narrow gaps caused by said thermal expansion due to its elasticity.
  • the finished cable grommet 14 generally consists of the cables 4, 5 which are fixedly connected to the grommet body 3.
  • the crimp contacts 6, 7 are also firmly integrated into the cable grommet.
  • the insulation sleeves 12, 13 are positively connected to the sleeve body 3 along their entire circumference.
  • the cable grommet 14 is thus inherently tight, with a continuous air exchange channel being retained via the cable core. Due to the firm connection of the insulation sheaths 12, 13 to the grommet body 3, all deformations during the heating or cooling of the cable grommet 14 are carried out coupled by the insulation sheaths 12, 13 and the grommet body 3.
  • the grommet 14 according to the invention is produced in the present exemplary embodiment in such a way that the grommet body 3 with inserted connecting cables 4, 5 is clutched by a production tool (not shown in more detail).
  • This Manufacturing tool can be designed, for example, in the form of a sleeve or in the form of two clamping jaws.
  • the entire cable grommet 14 is then heated, for example, in an oven, the grommet body 3 and the insulation sleeves 12, 13 expanding. Any existing ring gaps around the insulation jackets 12, 13 are closed. The entire cable grommet 14 is thus pressurized within the production tool. During the heating, the interfaces between insulation jackets 12, 13 and the grommet body 3 are melted or fused. This results in the desired firm and tight all-round connection.
  • Such a cable grommet 14 can be produced with significantly less effort than the hitherto customary sealing by means of sealing tubes which are placed around the connecting cable.
  • the necessary tightness is guaranteed at all times and permanently, it being possible for both the grommet body 3 and the insulation sleeves 12, 13 to be made of Teflon.
  • the tightness is also present when, at the interface, glass-fiber-filled PTFE of the sleeve body 3 meets pure PTFE of the insulation sheaths 12, 13.
  • the caulking of the cable grommet 14 in the metal sleeve 2 is preferably carried out only after the installation of the cable grommet 14 in the metal sleeve 2 with an inserted O-ring.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Insulating Bodies (AREA)
  • Installation Of Indoor Wiring (AREA)

Abstract

L'invention concerne un dispositif (14) insensible à la température pour étanchéifier un passe-câble destiné à une sonde de mesure de gaz, notamment pour les sondes Lambda de véhicules. Ledit dispositif garantit une étanchéification durable et fiable pour un faible coût de réalisation. Pour ce faire, l'invention propose qu'au moins un câble (4, 5), composé d'une âme conductrice d'électricité et d'une gaine d'isolation (12, 13), traverse une douille (3) en étant relié fermement à ladite douille par liaison de forme, par l'intermédiaire de toute la périphérie de la gaine d'isolation (12, 13).
PCT/DE1996/001890 1995-10-27 1996-10-01 Dispositif d'etancheification d'un passe-cable WO1997015974A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19540022.4 1995-10-27
DE1995140022 DE19540022A1 (de) 1995-10-27 1995-10-27 Anordnung zum Abdichten einer Kabeldurchführung

Publications (2)

Publication Number Publication Date
WO1997015974A2 true WO1997015974A2 (fr) 1997-05-01
WO1997015974A3 WO1997015974A3 (fr) 1997-06-19

Family

ID=7775928

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001890 WO1997015974A2 (fr) 1995-10-27 1996-10-01 Dispositif d'etancheification d'un passe-cable

Country Status (2)

Country Link
DE (1) DE19540022A1 (fr)
WO (1) WO1997015974A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631501C2 (de) * 1996-08-03 1998-09-10 Bosch Gmbh Robert Gasdurchlässige Anschlußleitung für einen Meßfühler
JP3311638B2 (ja) * 1997-05-22 2002-08-05 矢崎総業株式会社 被覆導体導出部の防水方法
DE19728370A1 (de) * 1997-07-03 1999-01-07 Bosch Gmbh Robert Kabeldurchführung für Anschlußkabel eines Gasmeßfühlers
DE19735559A1 (de) * 1997-08-16 1999-02-18 Bosch Gmbh Robert Gasmeßfühler
DE19848296A1 (de) * 1998-10-12 2000-04-13 Peter Van Treeck Korrosionsstabile Anschlussklemme zur reversiblen Herstellung elektrischer Anschlüsse in Elektrolyten und anderen korrosiven Medien
ITTO20030230A1 (it) * 2003-03-27 2004-09-28 Fiat Ricerche Organo connettore per collegamenti elettrici attraverso

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB968277A (en) * 1960-05-02 1964-09-02 English Electric Co Ltd Improvements in or relating to bonding agents and processes and bonded assemblies produced therewith
US4107451A (en) * 1975-11-19 1978-08-15 Trech, Inc. Reinforced splice joint and method of making same
US4216351A (en) * 1977-08-26 1980-08-05 Akzona Incorporated Plastic collar integral with a cable jacket
DE4126378A1 (de) * 1990-10-26 1992-04-30 Bosch Gmbh Robert Gasmessfuehler, insbesondere zur bestimmung des sauerstoffgehaltes in abgasen von brennkraftmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB968277A (en) * 1960-05-02 1964-09-02 English Electric Co Ltd Improvements in or relating to bonding agents and processes and bonded assemblies produced therewith
US4107451A (en) * 1975-11-19 1978-08-15 Trech, Inc. Reinforced splice joint and method of making same
US4216351A (en) * 1977-08-26 1980-08-05 Akzona Incorporated Plastic collar integral with a cable jacket
DE4126378A1 (de) * 1990-10-26 1992-04-30 Bosch Gmbh Robert Gasmessfuehler, insbesondere zur bestimmung des sauerstoffgehaltes in abgasen von brennkraftmaschinen

Also Published As

Publication number Publication date
WO1997015974A3 (fr) 1997-06-19
DE19540022A1 (de) 1997-04-30

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