WO2008128807A2 - Ground connection for electronic devices - Google Patents

Ground connection for electronic devices Download PDF

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Publication number
WO2008128807A2
WO2008128807A2 PCT/EP2008/052112 EP2008052112W WO2008128807A2 WO 2008128807 A2 WO2008128807 A2 WO 2008128807A2 EP 2008052112 W EP2008052112 W EP 2008052112W WO 2008128807 A2 WO2008128807 A2 WO 2008128807A2
Authority
WO
WIPO (PCT)
Prior art keywords
ground connection
housing cover
electrically conductive
bottom plate
ground
Prior art date
Application number
PCT/EP2008/052112
Other languages
German (de)
French (fr)
Other versions
WO2008128807A3 (en
Inventor
Josef Loibl
Karl Smirra
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008128807A2 publication Critical patent/WO2008128807A2/en
Publication of WO2008128807A3 publication Critical patent/WO2008128807A3/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/6485—Electrostatic discharge protection
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/002—Casings with localised screening
    • H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]
    • H05K9/0024—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields
    • H05K9/0026—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields integrally formed from metal sheet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail

Definitions

  • the invention relates to a ground connection for electronic devices according to the preamble of patent claim 1 and a method for producing such a ground connection, in particular for transmission or engine controls in the automotive industry.
  • Modern mechatronics that is, in particular control electronics, which are used directly on site, for example in a transmission or in an engine, are subject to a variety of environmental requirements.
  • the increased operating temperatures and the environment of the engine or transmission which is mechanically demanding due to the constant vibration load, are in the foreground. Therefore, it is imperative that the sensitive electronics be protected as far as possible from these influences.
  • the stringent requirements for electromagnetic shielding play an increasingly important role, since a large number of electronics and computer parts are combined in particular in the engine and gear compartment.
  • the conception of the ground connection points of the electronics is a great challenge in order to comply with the requirements for electromagnetic shielding.
  • ground terminal for electronic devices, for example, the engine control to the engine block.
  • a prefabricated cable such as a copper strand is often provided with an eyelet, which can then be screwed to the chassis or the engine block.
  • Such a conventional ground connection has several disadvantages. On the one hand, assembly errors can occur during device installation or later during repair. This possibly leads to an increase of the electrical transition resistance of the ground connection and to disturbances in the device. On the other hand, this type of ground connection requires a relatively large number of individual parts, which must be mounted one after the other and thus to an increased installation cost.
  • DE 101 36 361 A1 describes a concept for the electrical contacting of a foil line with ground potential.
  • a designed as a threaded ground bolt on the housing and a special, multi-part wing screw is provided which has a receptacle for film conductor in a flat area.
  • a conventional round conductor can be fastened and contacted with the screw.
  • ground connections formed in this way is that this concept can only be applied to the respectively specific ground contacts by means of a receptacle to be provided on the housing side.
  • these concepts presuppose per se that a special ground connection must be formed either as a threaded bolt or as a recess on the ground conductor. This also requires an increased accuracy of fit of the arrangement of the entire component relative to the special connection of the ground conductor.
  • ground connections are less flexible and therefore faulty over the entire service life. in the case of heavily impacted housings and components.
  • a vibration damper with a Dampfungskorper made of elastic material is known, which is surrounded by a cup-shaped metal part.
  • the interior of the half-shell metal part is closed by a flexible part, which may in particular consist of an electrically conductive fabric.
  • a ground connection can be made via the electrically conductive tissue.
  • the object of the invention is therefore to provide a simplified concept for ground connection of vibration-loaded electronic components, which allows a simplified assembly and at the same time has a long service life. This is achieved according to the invention with a device according to the patent claim 1.
  • a ground connection for vibration-loaded electronic components having a housing cover, at least one printed circuit board for connecting the electronic peripheral components to the central control electronics and a base plate which has at least one electrically conductive connection element which is arranged between the housing cover of the housing electronic component and the bottom plate can make a resilient electrically conductive connection.
  • the electrically conductive connection element can be designed as a simple round conductor and thus as an additional component to be used variably, or it can particularly preferably be formed as an extension of the housing cover.
  • the extension can resiliently engage in a recess of the bottom plate.
  • the spring force can on the one hand in the horizontal direction for a secure connection even with vibration load. On the other hand, the spring force in the vertical direction for holding down and fixing the housing cover contribute.
  • the ground connection system of the present invention has the decisive advantage over the previously known ground connections that it does not require expensive and expensive materials for the production.
  • the construction of at least one resilient connection element as an extension of the housing cover and at least one recess in the bottom plate, in which the extension can be brought into engagement, also allows a cost-effective and flexible adaptation of the connection system to different specifications, for example, for dimensioning and spacing of the carrier and the
  • the system according to the invention offers a high level of efficiency due to the materials used Longevity and excellent resistance to both mechanical and environmental influences.
  • By means of one or more integrated resilient extensions of an electrically conductive material both a recording of the vibrations and a ground connection to the bottom plate can be produced.
  • the arrangement according to the invention therefore offers, in addition to increased reliability, also easier assembly without error susceptibility.
  • the integration of the resilient extension provides an extra Liehe force, which holds down the housing cover.
  • the extension can also be adapted in its shape and dimension to the specifications of the housing cover and the bottom plate.
  • the extension is made of an electrically conductive metal sheet, such as aluminum or steel sheet.
  • the extension can be made of a metallized plastic.
  • the housing cover is made of a metallic material and is made for example as a stamped and bent part of sheet steel or aluminum. This results in increased rigidity and long-term stability, a good diffusion density against aggressive chemicals and improved EMC shielding values over the entire service life of the control board.
  • the bottom plate is preferably attached to a carrier which is, for example via a hydraulic plate with the gear housing, the chassis o- another massager in combination.
  • a plurality of electrically conductive connection elements can be arranged on the housing cover such that the housing cover rests force-free on the floor plate.
  • electrically conductive connection element may be additionally provided outside the contact points with an insulating Schutzuberyak. In this way, the electromagnetic shielding values and the long-term durability of the component can be additionally improved.
  • a ground connection according to the invention of an integrated electronic component can particularly preferably be used as part of a connection for control electronics, in particular for transmissions and / or for motors, in the automobile industry.
  • a particularly preferred field of use for a ground connection of the present invention is the integrated mechatronic control devices for motor vehicle transmissions.
  • Fig. 1 is a perspective cross-sectional view of a mounted ground connection system
  • FIG. 2 is a perspective plan view of a closed embodiment of an inventive ground connection system.
  • FIG. 1 shows a perspective view of a ground connection system 1 according to the invention.
  • the ground connection system 1 has a bottom plate 2 and a housing cover 3 with a matched electrically conductive extension 5.
  • the extension 5 can be configured rod-shaped, wherein in the illustrated embodiment, the extension S-shaped spring is formed. This advantageously results in a spring force which makes a contribution both in the vertical direction for holding down the housing cover 3 as well as in the horizontal direction for fixed contact with the bottom plate 2 and thus for secure ground connection.
  • the extension 5 can engage with its resilient S-shaped part in a recess 6.
  • the extension 5 is preferably made of electrically conductive material, for example sheet steel.
  • Recess 6 in the bottom plate 2 may be suitably designed around and adapted in its dimensions to the extension 5 and the respective requirements.
  • the housing cover 3 can be placed form-fittingly on the floor plate 2 fitted with a flexible printed circuit board 4, so that a secure fit of the housing cover 3 and thus also of the contacting extension 5 is ensured.
  • the S-shaped extension 5 may protrude beyond the bottom plate 3 in the assembled state. The then protruding part of the extension 5 can, if necessary, additionally contacted with a support element.
  • the extension can also be provided with an insulating protective cover, the contact points remain free.
  • This insulating U-coating can be made in one piece with a corresponding protective coating of the housing cover 3 and, for example, consist of anodized, lacquer or plastic.
  • an electronic substrate 7 which may have, for example, various electronic components.
  • the substrate 7 with its various electronic components in the interior of the housing cover 3 is connected via direct contacts, for example via Dickdrahtbondungen, with the circuit board 4.
  • the circuit board 4 in Inside area of the housing cover 3 cut out and in the resulting cutout, the electronic substrate 7 is arranged.
  • the electronic substrate 7 is further electrically conductively connected via a direct ground contact 8 with the bottom plate 2.
  • FIG. 2 shows a perspective top view of a closed ground connection from FIG. 1 for connecting an electronic component, for example a motor or transmission control system with a mass carrier (not shown).
  • the mass carrier can be, for example, a hydraulic plate, an engine block or a transmission housing.
  • the ground connection system can be placed or screwed.
  • the bottom plate 2 carries a printed circuit board 4, wherein the housing cover 3 is arranged circumferentially fixed directly on the circuit board 4.
  • the circuit board 4 has a larger area than the housing cover 3 and protrudes below the attachment surface of the lid 3.
  • the contacting points for the connection to peripheral components are arranged outside the housing cover 3 in the edge region of the printed circuit board 4.
  • connection of the peripheral components with the printed circuit board can be produced for example by soldering, welding or crimping.
  • the resilient extensions 5 can both fulfill the task of ground contacting and, in addition, react flexibly to occurring vibrations. This significantly increases the long-term stability of the ground connection.
  • the S-shaped extension 5 of the housing cover 3 can be surrounded form-fitting manner by the recess 6. This has the advantage that even with a lateral relative movement with a vibration occurring an uninterrupted contact of the ground connection can be given. Below the housing cover 6, the electronic substrate with the electronic components 7 can be arranged protected.
  • the production of a ground connection for vibration-loaded electronic components is provided for the first time for a mass carrier in which a ground connection to the bottom plate and thus to the mass carrier is produced by means of one or more integrated resilient extensions of the housing cover made of an electrically conductive material can.
  • the arrangement according to the invention therefore offers not only increased reliability and improved electromagnetic shielding, but also easier assembly without error susceptibility.
  • the integration of the resilient extension into the housing cover ensures a considerably simplified construction.

Abstract

The invention relates to a ground connection system (1) for electronic components that are exposed to vibrations. Said system comprises a frame (2), at least one printed circuit board (4) and a casing cover (3). One or more electrically conducting terminal elements (5) are arranged on the casing cover (3) in such a manner that they can resiliently engage in at least one recess (6) of the frame (3) and establish an electrically conducting connection between the casing cover (3) and the frame (2).

Description

Beschreibungdescription
Masseanschluss für elektronische GerateGround connection for electronic devices
Die Erfindung betrifft einen Masseanschluss für elektronische Gerate gemäß dem Oberbegriff des Patentanspruchs 1 sowie ein Verfahren zur Herstellung eines solchen Masseanschlusses, insbesondere für Getriebe- oder Motorsteuerungen in der Automobilindustrie .The invention relates to a ground connection for electronic devices according to the preamble of patent claim 1 and a method for producing such a ground connection, in particular for transmission or engine controls in the automotive industry.
Stand der TechnikState of the art
Moderne Mechatroniken, das heißt insbesondere Steuerelektroniken, die direkt vor Ort beispielsweise in einem Getriebe oder in einem Motor eingesetzt werden, unterliegen einer Vielzahl von umgebungsabhangigen Anforderungen. Neben der Langzeitstabilitat und Ausfallsicherheit der Steuerung stehen die erhöhten Betriebstemperaturen sowie die durch die standige Vibrationsbelastung mechanisch anspruchsvolle Umgebung des Motors oder Getriebes im Vordergrund. Daher ist es unerlass- lich, dass die empfindlichen Elektroniken soweit wie möglich vor diesen Einflüssen geschützt werden. Daneben spielen die strengen Vorgaben zur elektromagnetischen Abschirmung eine immer großer werdende Rolle, da insbesondere im Motor- und Getrieberaum eine Vielzahl von Elektroniken und Computerteilen zusammengefasst werden. Gerade die Konzeption der Masseanschlussstellen der Elektroniken stellt eine große Herausforderung dar, um die Vorgaben zur elektromagnetischen Abschirmung einzuhalten.Modern mechatronics, that is, in particular control electronics, which are used directly on site, for example in a transmission or in an engine, are subject to a variety of environmental requirements. In addition to the long-term stability and failure safety of the control, the increased operating temperatures and the environment of the engine or transmission, which is mechanically demanding due to the constant vibration load, are in the foreground. Therefore, it is imperative that the sensitive electronics be protected as far as possible from these influences. In addition, the stringent requirements for electromagnetic shielding play an increasingly important role, since a large number of electronics and computer parts are combined in particular in the engine and gear compartment. The conception of the ground connection points of the electronics is a great challenge in order to comply with the requirements for electromagnetic shielding.
Es sind verschiedene Konzepte bekannt, den Massenanschluss für elektronische Gerate zum Beispiel der Motorsteuerung an dem Motorblock zu befestigen. So wird häufig einfach eine konfektionierte Leitung wie beispielsweise eine Kupferlitze mit einer Ose versehen, die anschließend an das Chassis oder den Motorblock geschraubt werden kann. Ein solcher herkömmlicher Masseanschluss zeigt mehrere Nachteile. Einerseits kann es zu Montagefehlern bei der Geratemontage oder spater bei der Reparatur kommen. Dies fuhrt möglicherweise zur Erhöhung des elektrischen Ubergangswider- Stands der Masseanbindung und zu Störungen im Gerat. Andererseits erfordert diese Art der Masseanbindung eine relativ große Zahl von einzelnen Teilen, die nacheinander montiert werden müssen und damit zu einem erhöhten Montageaufwand.There are various concepts known to attach the ground terminal for electronic devices, for example, the engine control to the engine block. For example, a prefabricated cable such as a copper strand is often provided with an eyelet, which can then be screwed to the chassis or the engine block. Such a conventional ground connection has several disadvantages. On the one hand, assembly errors can occur during device installation or later during repair. This possibly leads to an increase of the electrical transition resistance of the ground connection and to disturbances in the device. On the other hand, this type of ground connection requires a relatively large number of individual parts, which must be mounted one after the other and thus to an increased installation cost.
Die DE 101 36 361 Al beschreibt ein Konzept zur elektrischen Kontaktierung einer Folienleitung mit Massepotential. Dazu ist ein als Gewinde ausgestalteter Massebolzen am Gehäuse und eine spezielle, mehrteilige Flugelschraube vorgesehen, die in einem flachen Bereich eine Aufnahme für Folienleiter auf- weist. Gleichzeitig kann zudem noch ein herkömmlicher Rundleiter mit der Schraube befestigt und kontaktiert werden.DE 101 36 361 A1 describes a concept for the electrical contacting of a foil line with ground potential. For this purpose, a designed as a threaded ground bolt on the housing and a special, multi-part wing screw is provided which has a receptacle for film conductor in a flat area. At the same time, in addition, a conventional round conductor can be fastened and contacted with the screw.
Auch die DE 10 2004 041 169 B3 beschreibt eine Anordnung zur Masseanbindung eines elektrischen Schaltungstragers . Es wird vorgeschlagen, zwischen einem Schaltungstrager und dem Masseleiter eine Steckverbindung mit einem Pin und einer passenden Ausnehmung auf der Gehauseseite vorzusehen, wobei die Steckverbindung als Presspassung ausgebildet ist. Anzahl und Form der Massepins können dabei flexibel ausgestaltet werden.DE 10 2004 041 169 B3 also describes an arrangement for ground connection of an electrical circuit carrier. It is proposed to provide a connector with a pin and a matching recess on the housing side between a circuit carrier and the ground conductor, wherein the connector is formed as a press fit. The number and shape of the ground pins can be made flexible.
Nachteilig bei den so ausgebildeten Masseanschlüssen ist, dass sich dieses Konzept nur auf die jeweils speziellen Masse-Kontaktierungen mittels einer an der Gehauseseite vorzusehenden Aufnahme anwenden lasst. Damit setzen diese Konzepte per se voraus, dass ein spezieller Masseanschluss entweder als Gewindebolzen oder als Ausnehmung an dem Masseleiter ausgebildet sein muss. Dies erfordert zudem eine erhöhte Passgenauigkeit der Anordnung des gesamten Bauteils relativ zum speziellen Anschluss des Masseleiters.The disadvantage of the ground connections formed in this way is that this concept can only be applied to the respectively specific ground contacts by means of a receptacle to be provided on the housing side. Thus, these concepts presuppose per se that a special ground connection must be formed either as a threaded bolt or as a recess on the ground conductor. This also requires an increased accuracy of fit of the arrangement of the entire component relative to the special connection of the ground conductor.
Darüber hinaus sind die bekannten Masseanschlüsse wenig flexibel und daher im Laufe der gesamten Lebensdauer fehleran- fallig, wenn es sich um stark vibrationsbelastete Gehäuse und Bauteile handelt.In addition, the known ground connections are less flexible and therefore faulty over the entire service life. in the case of heavily impacted housings and components.
In diesem Zusammenhang sind in der jüngsten Vergangenheit verschiedene Schwingungsdampfer zur Aufhangung einer Steuerelektronik an Gehäusen entwickelt worden.In this connection, various vibration dampers have been developed in recent years for suspending control electronics on housings.
So ist aus der DE 199 51 265 Al ein Schwingungsdampfer mit einem Dampfungskorper aus elastischem Material bekannt, der von einem tassenformigen Metallteil umgeben ist. Vorzugsweise ist der Innenraum des halbschaligen Metallteils durch ein flexibles Teil abgeschlossen, welches insbesondere aus einem elektrisch leitenden Gewebe bestehen kann. Auf diese Weise sorgt es für eine gute leitende Verbindung zwischen den bei- den zueinander entgegengesetzt angebrachten Metallbolzen, die zur Befestigung des Schwingungsdampfers am Gehäuse dienen. So kann eine Masseanbindung über das elektrisch leitende Gewebe hergestellt werden.Thus, from DE 199 51 265 Al a vibration damper with a Dampfungskorper made of elastic material is known, which is surrounded by a cup-shaped metal part. Preferably, the interior of the half-shell metal part is closed by a flexible part, which may in particular consist of an electrically conductive fabric. In this way, it ensures a good conductive connection between the two mutually oppositely mounted metal bolts, which serve to attach the vibration damper to the housing. Thus, a ground connection can be made via the electrically conductive tissue.
Nachteilig an dieser Weiterentwicklung der Masseanbindung ist die Tatsache, dass sie aufgrund des elektrisch leitenden Gewebes möglicherweise nicht ausreichend robust ist, um über die gesamte Lebensdauer des Motors oder des Getriebes in der sowohl mechanisch als auch chemisch und temperaturbedingt ag- gressiven Umgebung einwandfrei zu kontaktieren. Zudem ist dieser Aufbau eines Schwingungsdampfers aufwendig und erfordert den passgenauen Einsatz des kostspieligen SpezialGewebes .A disadvantage of this further development of the ground connection is the fact that it may not be sufficiently robust due to the electrically conductive fabric in order to contact properly over the entire life of the engine or transmission in both mechanically and chemically and temperature-conditioned aggressive environment. In addition, this structure of a vibration damper is complex and requires the custom-fit use of expensive SpezialGewebes.
Aufgabenstellungtask
Aufgabe der Erfindung ist es daher, ein vereinfachtes Konzept zur Masseanbindung von vibrationsbelasteten elektronischen Bauteilen bereit zu stellen, das eine vereinfachte Montage erlaubt und gleichzeitig eine hohe Lebensdauer aufweist. Dies wird erfindungsgemaß mit einer Vorrichtung entsprechend des Patentanspruchs 1 erreicht.The object of the invention is therefore to provide a simplified concept for ground connection of vibration-loaded electronic components, which allows a simplified assembly and at the same time has a long service life. This is achieved according to the invention with a device according to the patent claim 1.
Erfindungsgemaß wird vorgeschlagen, einen Masseanschluss für vibrationsbelastete elektronische Bauteile mit einem Gehausedeckel, mindestens einer Leiterplatte zur Verbindung der e- lektronischen peripheren Komponenten mit der zentralen Steuerungselektronik und einer Bodenplatte zur Verfugung zu stellen, der mindestens ein elektrisch leitendes Anschlusselement aufweist, welches zwischen dem Gehausedeckel des elektronischen Bauteils und der Bodenplatte eine federnde elektrisch leitende Verbindung herstellen kann.According to the invention, it is proposed to provide a ground connection for vibration-loaded electronic components having a housing cover, at least one printed circuit board for connecting the electronic peripheral components to the central control electronics and a base plate which has at least one electrically conductive connection element which is arranged between the housing cover of the housing electronic component and the bottom plate can make a resilient electrically conductive connection.
Das elektrisch leitende Anschlusselement kann als einfacher Rundleiter und damit als zusatzliche, variabel einzusetzende Komponente ausgestaltet sein oder es kann besonders bevorzugt als Fortsatz des Gehausedeckels ausgebildet sein.The electrically conductive connection element can be designed as a simple round conductor and thus as an additional component to be used variably, or it can particularly preferably be formed as an extension of the housing cover.
Der Fortsatz kann in eine Ausnehmung der Bodenplatte federnd eingreifen. Die Federkraft kann einerseits in horizontaler Richtung für eine sichere Verbindung auch bei Vibrationsbelastung sorgen. Andererseits kann die Federkraft in vertikaler Richtung zur Niederhaltung und Befestigung des Gehausedeckels beitragen.The extension can resiliently engage in a recess of the bottom plate. The spring force can on the one hand in the horizontal direction for a secure connection even with vibration load. On the other hand, the spring force in the vertical direction for holding down and fixing the housing cover contribute.
Das Masseanschlusssystem der vorliegenden Erfindung weist gegenüber den bisher bekannten Masseanschlüssen den entscheidenden Vorteil auf, dass es keine aufwendigen und teueren Materialien zur Herstellung benotigt. Der Aufbau aus mindestens einem federnden Anschlusselement als Fortsatz des Gehausedeckels und mindestens einer Ausnehmung in der Bodenplatte, in die der Fortsatz zum Eingriff gebracht werden kann, erlaubt zudem eine kostengünstige und flexible Anpassung des Anschlusssystems an unterschiedliche Vorgaben beispielsweise zur Dimensionierung und Beabstandung des Tragers und derThe ground connection system of the present invention has the decisive advantage over the previously known ground connections that it does not require expensive and expensive materials for the production. The construction of at least one resilient connection element as an extension of the housing cover and at least one recess in the bottom plate, in which the extension can be brought into engagement, also allows a cost-effective and flexible adaptation of the connection system to different specifications, for example, for dimensioning and spacing of the carrier and the
Steuerungselektronik. Darüber hinaus bietet das erfindungsge- maße System aufgrund der eingesetzten Materialien eine hohe Lebensdauer und eine ausgezeichnete Widerstandfahigkeit gegenüber sowohl mechanischen als auch umweltbedingten Einflüssen. Mittels einem oder mehrerer integrierter federnder Fortsatze aus einem elektrisch leitenden Material kann sowohl ei- ne Aufnahme der Schwingungen als auch ein Masseanschluss zur Bodenplatte hergestellt werden. Die erfindungsgemaße Anordnung bietet mithin neben einer erhöhten Zuverlässigkeit auch eine erleichterte Montage ohne Fehleranfalligkeit . Zudem stellt die Integration des federnden Fortsatzes eine zusatz- liehe Kraft zur Verfugung, die den Gehausedeckel niederhalt.Control electronics. In addition, the system according to the invention offers a high level of efficiency due to the materials used Longevity and excellent resistance to both mechanical and environmental influences. By means of one or more integrated resilient extensions of an electrically conductive material, both a recording of the vibrations and a ground connection to the bottom plate can be produced. The arrangement according to the invention therefore offers, in addition to increased reliability, also easier assembly without error susceptibility. In addition, the integration of the resilient extension provides an extra Liehe force, which holds down the housing cover.
Weitere vorteilhafte Ausgestaltungen und Weiterbildungen, welche einzeln oder in Kombination miteinander eingesetzt werden können, sind Gegenstand der abhangigen Ansprüche.Further advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.
Der Fortsatz kann ebenso in seiner Gestalt und Dimension an die Vorgaben des Gehausedeckels und der Bodenplatte angepasst werden. Bevorzugt wird der Fortsatz aus einem elektrisch leitenden Metallblech, beispielsweise Aluminium oder Stahlblech gefertigt. In einer weiteren Ausgestaltung der Erfindung kann der Fortsatz aus einem metallisierten Kunststoff gefertigt sein .The extension can also be adapted in its shape and dimension to the specifications of the housing cover and the bottom plate. Preferably, the extension is made of an electrically conductive metal sheet, such as aluminum or steel sheet. In a further embodiment of the invention, the extension can be made of a metallized plastic.
Bevorzugt besteht der Gehausedeckel aus einem metallischen Material und ist beispielsweise als Stanzbiegeteil aus Stahlblech oder Aluminium gefertigt. Dadurch ergeben sich eine erhöhte Steifigkeit und Langzeitstabilitat, eine gute Diffusionsdichte gegenüber aggressiven Chemikalien und verbesserte EMV-Abschirmwerte über die gesamte Lebensdauer des Steuerge- rats.Preferably, the housing cover is made of a metallic material and is made for example as a stamped and bent part of sheet steel or aluminum. This results in increased rigidity and long-term stability, a good diffusion density against aggressive chemicals and improved EMC shielding values over the entire service life of the control board.
Zur Einhaltung der Vorschriften zur Elektromagnetischen Abschirmung der einzelnen Elektroniken wird die Bodenplatte bevorzugt an einen Trager angebracht, der beispielsweise über eine Hydraulikplatte mit dem Getriebegehause, dem Chassis o- der einem anderen Massetrager in Verbindung steht. In einer bevorzugten Ausgestaltung der Erfindung können mehrere elektrisch leitende Anschlusselemente so am Gehausedeckel angeordnet werden, dass der Gehausedeckel kraftefrei auf der Bodenplatte aufsitzt. Auf diese Weise wird erfindungsge- maß erreicht, dass keine unerwünschten Querkrafte auf den Gehausedeckel oder auf die Bodenplatte wirken, die insbesondere im Hinblick auf die Langzeitstabilitat des Bauteils nachteilig waren.To comply with the requirements for electromagnetic shielding of the individual electronics, the bottom plate is preferably attached to a carrier which is, for example via a hydraulic plate with the gear housing, the chassis o- another massager in combination. In a preferred embodiment of the invention, a plurality of electrically conductive connection elements can be arranged on the housing cover such that the housing cover rests force-free on the floor plate. In this way, according to the invention, it is achieved that no undesired transverse forces act on the housing cover or on the base plate, which were disadvantageous in particular with regard to the long-term stability of the component.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung kann elektrisch leitende Anschlusselement außerhalb der Kontaktstellen zusatzlich mit einem isolierenden Schutzuberzug versehen sein. Auf diese Weise können die elektromagnetischen Abschirmwerte und die Langzeitbestandigkeit der Komponente zusatzlich verbessert werden.In a further advantageous embodiment of the invention, electrically conductive connection element may be additionally provided outside the contact points with an insulating Schutzuberzug. In this way, the electromagnetic shielding values and the long-term durability of the component can be additionally improved.
Ein erfindungsgemaßer Masseanschluss eines integrierten e- lektronischen Bauteils kann besonders bevorzugt als Bestandteil eines Anschlusses für eine Steuerelektronik, insbesonde- re für Getriebe und/oder für Motoren, in der Automobilindustrie verwendet werden. Ein besonders bevorzugtes Einsatzgebiet für einen Masseanschluss der vorliegenden Erfindung liegt bei den integrierten mechatronischen Steuergeraten für Kraftfahrzeuggetriebe .A ground connection according to the invention of an integrated electronic component can particularly preferably be used as part of a connection for control electronics, in particular for transmissions and / or for motors, in the automobile industry. A particularly preferred field of use for a ground connection of the present invention is the integrated mechatronic control devices for motor vehicle transmissions.
Die Erfindung wird nachfolgend in beispielhafter Weise anhand von einer Ausfuhrungsvariante in Verbindung mit den Zeichnungen erläutert, ohne darauf beschrankt zu sein.The invention is explained below by way of example with reference to an embodiment variant in conjunction with the drawings, without being limited thereto.
In dieser zeigt:In this shows:
Fig. 1 einer perspektivischen Querschnittsansicht eines montierten Masseanschlusssystems undFig. 1 is a perspective cross-sectional view of a mounted ground connection system and
Fig. 2 eine perspektivische Draufsicht auf eine geschlossene Ausgestaltung eines erfindungsgemaßen Masseanschluss- Systems . Fig. 1 zeigt in einer perspektivischen Querschnittsansicht ein erfindungsgemaßes Masseanschlusssystem 1. Das Masseanschlusssystem 1 weist eine Bodenplatte 2 und einen Gehausedeckel 3 mit einem angepassten elektrisch leitenden Fortsatz 5 auf. Der Fortsatz 5 kann stabformig ausgestaltet sein, wobei in der gezeigten Ausfuhrungsform der Fortsatz S-formig federnd ausgebildet ist. Hierdurch ergibt sich vorteilhafterweise eine Federkraft, die einen Beitrag sowohl in vertikaler Richtung zur Niederhaltung des Gehausedeckels 3 als auch in horizontaler Richtung zur festen Anlage an die Bodenplatte 2 und damit zur sicheren Masseanbindung leistet. In der Bodenplatte 2 als Grundtrager kann der Fortsatz 5 mit seinem federnden S-formig gestalteten Teil in eine Aussparung 6 eingreifen. Der Fortsatz 5 ist vorzugsweise aus elektrisch lei- tendem Material, beispielsweise Stahlblech gefertigt. DieFig. 2 is a perspective plan view of a closed embodiment of an inventive ground connection system. FIG. 1 shows a perspective view of a ground connection system 1 according to the invention. The ground connection system 1 has a bottom plate 2 and a housing cover 3 with a matched electrically conductive extension 5. The extension 5 can be configured rod-shaped, wherein in the illustrated embodiment, the extension S-shaped spring is formed. This advantageously results in a spring force which makes a contribution both in the vertical direction for holding down the housing cover 3 as well as in the horizontal direction for fixed contact with the bottom plate 2 and thus for secure ground connection. In the base plate 2 as a basic carrier, the extension 5 can engage with its resilient S-shaped part in a recess 6. The extension 5 is preferably made of electrically conductive material, for example sheet steel. The
Ausnehmung 6 in der Bodenplatte 2 kann zweckmaßigerweise rund ausgestaltet und in seinen Dimensionen an den Fortsatz 5 und die jeweiligen Anforderungen angepasst sein. Vorteilhafterweise kann der Gehausedeckel 3 formschlussig auf die mit ei- ner flexiblen Leiterplatte 4 bestuckten Bodenplatte 2 aufgesetzt sein, so dass ein sicherer Sitz des Gehausedeckels 3 und damit auch des kontaktierenden Fortsatzes 5 gewahrleistet ist. Der S-formige Fortsatz 5 kann über die Bodenplatte 3 im zusammengesetzten Zustand hinausragen. Der dann überstehende Teil des Fortsatzes 5 kann, sofern erforderlich, zusatzlich mit einem Tragerelement kontaktiert sein. Der Fortsatz kann weiterhin mit einem isolierenden Schutzuberzug versehen sein, wobei die Kontaktstellen frei bleiben. Dieser isolierende U- berzug kann in einem Stuck mit einem entsprechenden Schutz- uberzug des Gehausedeckels 3 gefertigt sein und beispielsweise aus Eloxal, Lack oder Kunststoff bestehen. Innerhalb des Gehausedeckels 3 befindet sich ein Elektronik-Substrat 7, das beispielsweise verschiedene elektronische Komponenten aufweisen kann. Das Substrat 7 mit seinen verschiedenen elektroni- sehen Komponenten im Innern des Gehausedeckels 3 ist über Direktkontakte, beispielsweise über Dickdrahtbondungen, mit der Leiterplatte 4 verbunden. Weiterhin ist die Leiterplatte 4 im Innenbereich des Gehausedeckels 3 ausgeschnitten und in dem so entstandenen Ausschnitt ist das elektronische Substrat 7 angeordnet. Das elektronische Substrat 7 ist weiterhin über einen direkten Massekontakt 8 mit der Bodenplatte 2 elekt- risch leitend verbunden.Recess 6 in the bottom plate 2 may be suitably designed around and adapted in its dimensions to the extension 5 and the respective requirements. Advantageously, the housing cover 3 can be placed form-fittingly on the floor plate 2 fitted with a flexible printed circuit board 4, so that a secure fit of the housing cover 3 and thus also of the contacting extension 5 is ensured. The S-shaped extension 5 may protrude beyond the bottom plate 3 in the assembled state. The then protruding part of the extension 5 can, if necessary, additionally contacted with a support element. The extension can also be provided with an insulating protective cover, the contact points remain free. This insulating U-coating can be made in one piece with a corresponding protective coating of the housing cover 3 and, for example, consist of anodized, lacquer or plastic. Within the housing cover 3 is an electronic substrate 7, which may have, for example, various electronic components. The substrate 7 with its various electronic components in the interior of the housing cover 3 is connected via direct contacts, for example via Dickdrahtbondungen, with the circuit board 4. Furthermore, the circuit board 4 in Inside area of the housing cover 3 cut out and in the resulting cutout, the electronic substrate 7 is arranged. The electronic substrate 7 is further electrically conductively connected via a direct ground contact 8 with the bottom plate 2.
Fig. 2 zeigt eine perspektivische Draufsicht auf einen geschlossenen Masseanschluss aus Fig. 1 zur Verbindung eines elektronischen Bauteils, beispielsweise einer Motor- oder Ge- triebesteuerung mit einem Massetrager (nicht gezeigt) . Der Massetrager kann zum Beispiel eine Hydraulikplatte, ein Motorblock oder ein Getriebegehause sein. Auf den Massetrager kann das Masseanschlusssystem aufgesetzt oder aufgeschraubt sein. Die Bodenplatte 2 tragt eine Leiterplatte 4, wobei der Gehausedeckel 3 umlaufend fest direkt auf der Leiterplatte 4 angeordnet ist. Die Leiterplatte 4 hat eine größere Flache als der Gehausedeckel 3 und ragt unter der Aufsatzflache des Deckels 3 hervor. Die Kontaktierungsstellen für die Verbindung zu peripheren Komponenten sind außerhalb des Gehausede- ckels 3 im Randbereich der Leiterplatte 4 angeordnet. Die Verbindung der peripheren Komponenten mit der Leiterplatte kann beispielsweise mittels Loten, Schweißen oder Crimpen hergestellt werden. Der federnde Fortsatz 5, der in die Bodenplatte 3 eingepasst ist, kontaktiert entweder direkt oder über die Bodenplatte mit dem darunter angeordneten Trager. Vorteilhafterweise können die federnden Fortsatze 5 sowohl die Aufgabe der Masse-Kontaktierung erfüllen als auch zusatzlich flexibel auf auftretende Vibrationen reagieren. Dies erhöht erheblich die Langzeitstabilitat des Masseanschlusses. Der S-formige Fortsatz 5 des Gehausedeckels 3 kann dabei formschlussig von der Ausnehmung 6 umgeben sein. Dies hat den Vorteil, dass selbst bei einer seitlichen Relativbewegung bei einer auftretenden Vibration eine ununterbrochene Anlage des Masseanschlusses gegeben sein kann. Unterhalb des Gehausede- ckels 6 kann das elektronische Substrat mit den elektronischen Komponenten 7 geschützt angeordnet werden. Zusammenfassend wird aufgrund des erfindungsgemaßen Masseanschlusssystems erstmals die Herstellung von einem Massean- schluss für vibrationsbelastete elektronische Bauteile an einen Massetrager bereit gestellt, in dem mittels eines oder mehrerer integrierter federnder Fortsatze des Gehausedeckels aus einem elektrisch leitenden Material ein Masseanschluss zur Bodenplatte und mithin zum Massetrager hergestellt werden kann. Die erfindungsgemaße Anordnung bietet mithin neben einer erhöhten Zuverlässigkeit und einer verbesserten elektro- magnetischen Abschirmung auch eine erleichterte Montage ohne Fehleranfalligkeit . Zudem stellt die Integration des federnden Fortsatzes in den Gehausedeckel einen erheblich vereinfachten Aufbau sicher. FIG. 2 shows a perspective top view of a closed ground connection from FIG. 1 for connecting an electronic component, for example a motor or transmission control system with a mass carrier (not shown). The mass carrier can be, for example, a hydraulic plate, an engine block or a transmission housing. On the mass carrier, the ground connection system can be placed or screwed. The bottom plate 2 carries a printed circuit board 4, wherein the housing cover 3 is arranged circumferentially fixed directly on the circuit board 4. The circuit board 4 has a larger area than the housing cover 3 and protrudes below the attachment surface of the lid 3. The contacting points for the connection to peripheral components are arranged outside the housing cover 3 in the edge region of the printed circuit board 4. The connection of the peripheral components with the printed circuit board can be produced for example by soldering, welding or crimping. The resilient extension 5, which is fitted in the bottom plate 3, contacted either directly or through the bottom plate with the carrier arranged underneath. Advantageously, the resilient extensions 5 can both fulfill the task of ground contacting and, in addition, react flexibly to occurring vibrations. This significantly increases the long-term stability of the ground connection. The S-shaped extension 5 of the housing cover 3 can be surrounded form-fitting manner by the recess 6. This has the advantage that even with a lateral relative movement with a vibration occurring an uninterrupted contact of the ground connection can be given. Below the housing cover 6, the electronic substrate with the electronic components 7 can be arranged protected. In summary, due to the ground connection system according to the invention, the production of a ground connection for vibration-loaded electronic components is provided for the first time for a mass carrier in which a ground connection to the bottom plate and thus to the mass carrier is produced by means of one or more integrated resilient extensions of the housing cover made of an electrically conductive material can. The arrangement according to the invention therefore offers not only increased reliability and improved electromagnetic shielding, but also easier assembly without error susceptibility. In addition, the integration of the resilient extension into the housing cover ensures a considerably simplified construction.

Claims

Patentansprüche claims
1. Masseanschlusssystem (1) für vibrationsbelastete elektronische Bauteile umfassend eine Bodenplatte (2), mindestens eine Leiterplatte (4) und einen Gehausedeckel (3) dadurch gekennzeichnet , dass ein oder mehrere elektrisch leitende Anschlusselemente (5) an dem Gehausedeckel (3) so angeordnet sind, dass sie in mindestens eine Ausnehmung (6) der Bodenplatte (3) federnd eingreifen können und zwischen dem Gehausedeckel (3) und der Bodenplatte (2) eine elektrisch leitende Verbindung herstellen.1. ground connection system (1) for vibration-loaded electronic components comprising a bottom plate (2), at least one printed circuit board (4) and a housing cover (3), characterized in that one or more electrically conductive connection elements (5) on the housing cover (3) so arranged are that they can resiliently engage in at least one recess (6) of the bottom plate (3) and establish an electrically conductive connection between the housing cover (3) and the bottom plate (2).
2. Masseanschlusssystem nach Anspruch 1, dadurch gekennzeichnet, dass das elektrisch leitende Anschlusselement (5) als ein federnder Fortsatz des Gehausedeckels (3) gefertigt ist.2. Ground connection system according to claim 1, characterized in that the electrically conductive connection element (5) is made as a resilient extension of the housing cover (3).
3. Masseanschlusssystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere elektrisch leitende Anschlussele- mente (5) so am Gehausedeckel angeordnet werden, dass der Gehausedeckel kraftefrei auf der Bodenplatte aufsitzt.3. Ground connection system according to claim 1 or 2, characterized in that several electrically conductive Anschlußele- elements (5) are arranged on the housing cover so that the housing cover rests force-free on the bottom plate.
4. Masseanschlusssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elektrisch leitende Anschlusselement (5) außerhalb der Kontaktstellen zusatzlich mit einem isolierenden Schutzuberzug versehen ist.4. Ground connection system according to one of the preceding claims, characterized in that the electrically conductive connection element (5) is additionally provided outside the contact points with an insulating protective cover.
5. Verwendung eines Masseanschlusssystems für ein vibrati- onsbelastetes elektronisches Bauteil nach einem der vorherge- henden Ansprüche als Bestandteil eines Anschlusses für eine Steuerelektronik, insbesondere für Getriebe und/oder für Motoren, in der Automobilindustrie. 5. Use of a ground connection system for a vibration-loaded electronic component according to one of the preceding claims as part of a connection for control electronics, in particular for transmissions and / or for motors, in the automotive industry.
PCT/EP2008/052112 2007-04-23 2008-02-21 Ground connection for electronic devices WO2008128807A2 (en)

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