EP2705996A2 - Grounding tab - Google Patents

Grounding tab Download PDF

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Publication number
EP2705996A2
EP2705996A2 EP13182781.8A EP13182781A EP2705996A2 EP 2705996 A2 EP2705996 A2 EP 2705996A2 EP 13182781 A EP13182781 A EP 13182781A EP 2705996 A2 EP2705996 A2 EP 2705996A2
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EP
European Patent Office
Prior art keywords
conductor
lug
grounding
eyelet
cable lug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13182781.8A
Other languages
German (de)
French (fr)
Other versions
EP2705996A3 (en
Inventor
Stefan Baumann
Bruno Gebhard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP17002072.1A priority Critical patent/EP3330153A1/en
Publication of EP2705996A2 publication Critical patent/EP2705996A2/en
Publication of EP2705996A3 publication Critical patent/EP2705996A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/041—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures with bodies characterised by use of light metal, e.g. aluminium
    • 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
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H01R4/625—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0207—Ultrasonic-, H.F.-, cold- or impact welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles
    • 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 grounding strap for making grounding of components.
  • earthing straps consisting of a tinned copper composite material to which a ground wire is connected and aluminum welded to the aluminum car body.
  • the structure of such a grounding tab is in Fig. 5-7 disclosed.
  • the rectangular, tin-plated copper 10 is pressed around the rod-shaped aluminum 11.
  • the starting material is delivered in poles.
  • To make a grounding lug it is cut to size, drilled, mechanically machined and deburred all around. In this case, a residue-free mechanical processing is necessary because copper residues on aluminum can lead to increased corrosion.
  • the object of the invention is to reduce the manufacturing cost of such grounding straps.
  • a grounding tab according to the invention comprises a cable lug, which in particular comprises copper, and a conductor, which in particular comprises aluminum.
  • the cable lug is made of copper or a copper alloy and / or the conductor is made of aluminum or an aluminum alloy.
  • the cable lug and the conductor are joined together, in particular welded, wherein the joint connection, or the welded joint, is available by means of electromagnetic pulse forming technology.
  • a grounding tab according to the invention is produced according to the invention by inserting the conductor into a conductor receptacle of the cable lug and then welding it to the cable lug, in particular with its conductor receptacle, by means of electromagnetic pulse-forming technology. It can be adapted by mechanical deformation of the inner contour of the conductor receiving a inserted into the conductor receptacle of the cable lug end of the conductor before insertion into the conductor receiving the lug, for example, be flattened to be complementary to this, in particular so that the inner cross section of Conductor receptacle and the outer cross section of the conductor undergo a transition fit to fit the conductor in a conductor receptacle of the cable lug.
  • the electrical contact resistance between cable lug and conductor is below a measure of a conventionally produced grounding strap by influencing predetermined, adjustable parameters of the EMPT method and because of the resulting cohesive connection.
  • the connection cross section of the earthing strap lies in the area of a conventionally crimped earthing puddle.
  • the cable lug has a closed, sleeve-shaped conductor receiving, in which the conductor is welded.
  • cable lugs are referred to as compression cable lugs.
  • the conductor receptacle is welded to the conductor.
  • the conductor is an aluminum rod, which forms a transition or press fit with the sleeve-shaped conductor receiving.
  • the aluminum rod has a larger cross section than the sleeve-shaped conductor receiving, in which case the conductor further educated at its inserted into the conductor receiving the cable lug end, in particular by mechanical deformation, can be adapted to the inner contour of the conductor receiving, for example, is flattened, and thus to this is designed complementary.
  • the conductor for welding for example, to a Aluminiumrohbau a rail vehicle of passenger traffic, at its free, the conductor receiving opposite end is mechanically deformed.
  • the ladder is supplied as an aluminum rod having a circular cross-section with two ends. This is connected to a first end with a complementary and correspondingly circular conductor receiving. Welding of the conductor at its free, second end is facilitated by the cross section of the conductor being approximately rectangular. To realize this, the ladder will be at its free, second End corresponding mechanically transformed, for example, flattened.
  • the earthing strap has an eyelet or a fork for fastening the earthing strap, for example with further cable lugs, and a base, which base forms an end face of the ladder receptacle and thus also the earthing strap, the earthing strap being from the base to the eyelet is tapered designed.
  • a thickness of the base is thus greater than a thickness of the eyelet or fork.
  • a grounding connection comprises a grounding lug according to the invention and another grounding lug, in particular galvanically connected, which is, for example, identical to the lug of the grounding lug, the further lug being an eyelet or a fork and one in the region of the eyelet or the fork has a substantially constant thickness, and wherein the further cable lug has a thickening, for example for receiving a conductor, wherein the grounding lug according to the invention comprises an eyelet or a fork and in the region of the eyelet or the fork has a substantially constant thickness, and extending in an angular range of at least 120 °, in particular of at least 180 °, around a center of the eyelet or fork, in particular pointing away from the base, at most to a degree about the center, which is smaller than a distance from a center of the eyelet Furthermore Cable lug to the thickening of the other cable lug. Two similar or even identically designed cable lugs
  • the grounding tab has an eyelet or a fork and a conductor receptacle, which eyelet or fork at an angle greater than 30 ° and less than 60 °, in particular at an angle of approximately 45 °, is inclined to a longitudinal axis of the conductor receiving.
  • a railway vehicle according to the invention in particular passenger transport, comprises an aluminum shell construction and cable lugs attached to the aluminum shell according to the invention, in particular of copper, as ground lugs.
  • the aluminum shell has correspondingly shaped aluminum conductors, which are attached to the aluminum shell or are formed without joints from the aluminum shell.
  • Fig. 1 and Fig. 2 is a grounding tab 1 according to the invention in a front view and in a side view each shown partially cut. It has a cable lug 2 and a conductor 3, which are interconnected. The connection is by means of electromagnetic pulse forming technology produced.
  • the conductor 3 is inserted into a conductor receptacle 4 of the cable lug 2.
  • the conductor 3 is formed correspondingly complementary to the conductor receptacle 4.
  • it has a circular cross section and is adapted to the inner contour of the conductor receptacle 4. By squeezing its free end is mechanically formed to weld along a weld to another component.
  • the conductor receptacle 4 is sleeve-shaped and encloses the conductor 3. It has a constant internal and external cross-section over the length of the conductor receptacle 4.
  • a base 5 forms a first end face of the cable lug 2. It also has this constant inner and outer cross-section.
  • the eyelet 6 is designed here as a bore with a bore longitudinal axis as the axis 7 of the eyelet 6 to eyelet 6 towards the cable lug 2 tapers the grounding lug 1.
  • the axis 7 forms the center in front view the eyelet 6 in the plane from.
  • the grounding tab 1 has a substantially constant thickness.
  • the base 5 opposite end face in an angular range ⁇ from here about 270 ° about a center 7 of the eyelet 6, a distance from a grounding tab 1 limiting contour to the center 7 of the eyelet 6 which is smaller than a distance from a center of an eyelet of another cable lug to the thickening of the further cable lug.
  • the cable lug 2 of the grounding lug 1 expands at most within the predetermined angular range about the center 7 of its lug 6, as the distance between the center 7 of the lug 6 and the conductor receptacle 4 has.
  • the area in the predetermined angular range constant thickness.
  • the conductor receptacle 4 has a greater thickness.
  • it is the area in the predetermined angular range for example, formed semicircular.
  • the angular range of 270 ° is to be regarded as exemplary only. Even smaller angular ranges, for example 180 ° and correspondingly parallel to the base 5 and the axis 7 cutting, are conceivable.
  • the axis 7 of the eyelet 6 intersects in this embodiment, a longitudinal axis 8 of the conductor receiving 4 vertically.
  • the eyelet 6 of in FIG. 3 and FIG. 4 On the other hand, the earthing strap illustrated has an angle of approximately 45 ° to a longitudinal axis 8 of the conductor receiving means 4.
  • the eyelet 6 is a bore in a plane of constant thickness of the cable lug 2, which plane is inclined to the longitudinal axis 8 of the conductor receptacle 4.
  • An eyelet 6 with an axis parallel to the longitudinal axis 8 of the conductor receptacle 4 is not shown here in the drawing.
  • the conductor 3 is in both outlined embodiments, a rod made of aluminum, which is welded to a Aluminiumrohbau a rail vehicle, indicated by the weld 9.
  • the conductor 3 in a suitable manner cohesively connected to the shell, so that a contact resistance between conductors and shell construction is low.
  • the cable lug 2 and the conductor 3 are connected by means of electromagnetic pulse forming technology, in particular so that a contact resistance between the conductor and cable lug 2 is low.
  • FIG. 5 a grounding tab of the prior art is shown.
  • a rectangular aluminum rod of height h and width b is pressed into a tinned copper sleeve of width B and height H.
  • the aluminum rod stands with a length 1 of the copper sleeve over.
  • the grounding tab has the length L and is provided with a bore of diameter D.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Multi-Conductor Connections (AREA)

Abstract

The clip (1) consists of a cable lug (2) comprising copper and a conductor (3) comprising aluminum, that are respectively welded together, such that a weld joint is formed by an electromagnetic pulse shaping technology. The conductor is introduced a closed-end sleeve-shaped conductor receptacle (4) of the cable lug, and welded. A loop (6) which is greater than 30 [deg] and less than 60 [deg] to a longitudinal axis of the conductor receptacle, is inclined at an angle. An independent claim is included for a method of manufacturing a grounding clip.

Description

Die Erfindung betrifft eine Erdungslasche zum Herstellen einer Erdung von Bauteilen.The invention relates to a grounding strap for making grounding of components.

Die Erdung von Schienenfahrzeug-Komponenten an Aluminium-Wagenkästen erfolgt bei höheren Strömen mit Hilfe von Erdungslaschen, welche aus einem Verbund-Werkstoff aus verzinntem Kupfer, an welchem ein Erdungsseil angeschlossen ist, und Aluminium, welches an den Aluminium-Wagenkasten angeschweißt ist, bestehen. Der Aufbau einer solchen Erdungslasche ist in Fig. 5-7 offenbart. Das rechteckige, verzinnte Kupfer 10 ist dabei um das stangenförmige Aluminium 11 verpresst. Das Ausgangsmaterial wird in Stangen angeliefert. Zum Herstellen einer Erdungslasche wird es zugeschnitten, abgebohrt, rundum mechanisch bearbeitet und entgratet. Dabei ist eine rückstandsfreie mechanische Bearbeitung notwendig, da Kupferrückstände an Aluminium zu erhöhter Korrosion führen können.The earthing of rail vehicle components on aluminum car bodies is carried out at higher currents by means of earthing straps consisting of a tinned copper composite material to which a ground wire is connected and aluminum welded to the aluminum car body. The structure of such a grounding tab is in Fig. 5-7 disclosed. The rectangular, tin-plated copper 10 is pressed around the rod-shaped aluminum 11. The starting material is delivered in poles. To make a grounding lug, it is cut to size, drilled, mechanically machined and deburred all around. In this case, a residue-free mechanical processing is necessary because copper residues on aluminum can lead to increased corrosion.

Aufgabe der Erfindung ist, die Herstellungskosten für solche Erdungslaschen zu senken.The object of the invention is to reduce the manufacturing cost of such grounding straps.

Gelöst wird die Aufgabe durch die Gegenstände der unabhängigen Patentansprüche 1 und 9. Weiterbildungen und Ausgestaltungen der Erfindung finden sich in den Merkmalen der jeweils abhängigen Patentansprüche wieder.The object is achieved by the subject matters of independent claims 1 and 9. Further developments and refinements of the invention can be found in the features of the respective dependent claims.

Eine erfindungsgemäße Erdungslasche umfasst einen Kabelschuh, welcher insbesondere Kupfer umfasst, und einen Leiter, welcher insbesondere Aluminium umfasst. Beispielsweise ist der Kabelschuh aus Kupfer oder aus einer Kupfer-Legierung hergestellt und/oder der Leiter ist aus Aluminium oder aus einer Aluminium-Legierung hergestellt. Weiterhin sind der Kabelschuh und der Leiter miteinander gefügt, insbesondere verschweißt, wobei die Fügeverbindung, bzw. die Schweißverbindung, mittels elektromagnetischer Pulsumformtechnologie erhältlich ist.A grounding tab according to the invention comprises a cable lug, which in particular comprises copper, and a conductor, which in particular comprises aluminum. For example, the cable lug is made of copper or a copper alloy and / or the conductor is made of aluminum or an aluminum alloy. Furthermore, the cable lug and the conductor are joined together, in particular welded, wherein the joint connection, or the welded joint, is available by means of electromagnetic pulse forming technology.

Eine erfindungsgemäße Erdungslasche wird erfindungsgemäß hergestellt indem der Leiter in eine Leiteraufnahme des Kabelschuhs eingeführt wird und anschließend mit dem Kabelschuh, insbesondere mit dessen Leiteraufnahme, mittels elektromagnetischer Pulsumformtechnologie verschweißt wird. Es kann ein in die Leiteraufnahme des Kabelschuhs eingeführtes Ende des Leiters vor dem Einführen in die Leiteraufnahme des Kabelschuhs durch mechanische Umformung an die Innenkontur der Leiteraufnahme angepasst werden, beispielsweise flachgedrückt werden, um zu dieser komplementär ausgebildet zu sein, insbesondere so, dass der Innenquerschnitt der Leiteraufnahme und der Außenquerschnitt des Leiters eine Übergangspassung eingehen, um den Leiter in eine Leiteraufnahme des Kabelschuhs einzupassen.A grounding tab according to the invention is produced according to the invention by inserting the conductor into a conductor receptacle of the cable lug and then welding it to the cable lug, in particular with its conductor receptacle, by means of electromagnetic pulse-forming technology. It can be adapted by mechanical deformation of the inner contour of the conductor receiving a inserted into the conductor receptacle of the cable lug end of the conductor before insertion into the conductor receiving the lug, for example, be flattened to be complementary to this, in particular so that the inner cross section of Conductor receptacle and the outer cross section of the conductor undergo a transition fit to fit the conductor in a conductor receptacle of the cable lug.

Mittels der Elektromagnetischen Pulsumformtechnologie (EMPT) ist eine stoffschlüssige Verbindung metallischer Komponenten ohne Zuführung von thermischer Energie möglich, durch Aufbau einer metallischen Bindung. "Hierzu erfolgt eine gezielte Beschleunigung der zu verbindenden Bauteile durch ein gepulstes, hochenergetisches Magnetfeld. Im Gegensatz zum thermischen Schweißen tritt keine Gefügebeeinflussung durch Wärmeeinwirkung auf. Darüber hinaus ist mit Hilfe des EMPT-Schweißens auch die stoffschlüssige Verbindung ungleicher und konventionell nicht schweißbarer Materialpaarungen, wie z. B. Aluminium und Stahl, möglich" [http://www.ptu.tu-dar- mstadt.de/mu_forschung/mu_triboligieundoberflaechentechnick/m enu_aktuelleforschungsprojekte/grundlagen _und_ mechanismen_ des _empt_schweissens/index.de.jsp, abgerufen am 15.03.2012].By means of electromagnetic pulse forming technology (EMPT), a cohesive connection of metallic components without the application of thermal energy is possible by building up a metallic bond. In contrast to thermal welding, there is no microstructural influence due to the effect of heat, and with the help of EMPT welding, there is also the material connection of unequal and conventionally non-weldable material pairings, such as eg aluminum and steel, possible "[http: //www.ptu.tu-dar- mstadt.de/mu_forschung/mu_triboligieundoberflaechentechnick/m enu_aktuelleforschungsprojekte / grundlagen _und_ mechanisms _ of _empt_schweissens / index.de.jsp, retrieved on 15.03. 2012].

Eine mechanische Nacharbeit oder eine spezielle Vorbereitung des Kabelschuhs und/oder des Leiters, z.B. das Entfernen einer Aluminiumoxidschicht, ist nicht erforderlich. Der elektrische Übergangswiderstand zwischen Kabelschuh und Leiter liegt durch Beeinflussung von vorgegebenen, einstellbaren Parametern des EMPT-Verfahrens und wegen der resultierenden stoffschlüssigen Verbindung unterhalb eines Maßes einer konventionell hergestellten Erdungslasche. Der Anbindungsquerschnitt der Erdungslasche liegt im Bereich einer konventionell gecrimpten Erdungslache.A mechanical rework or a special preparation of the cable lug and / or the conductor, such as the removal of an aluminum oxide layer, is not required. The electrical contact resistance between cable lug and conductor is below a measure of a conventionally produced grounding strap by influencing predetermined, adjustable parameters of the EMPT method and because of the resulting cohesive connection. The connection cross section of the earthing strap lies in the area of a conventionally crimped earthing puddle.

Unter anderem, um die Bauhöhe der Erfindung zu begrenzen, sind verschiedene Ausführungsformen von Kabelschuhen verwendbar.Among other things, in order to limit the height of the invention, various embodiments of cable lugs can be used.

Gemäß einer Weiterbildung der erfindungsgemäßen Erdungslasche weist der Kabelschuh eine geschlossene, hülsenförmige Leiteraufnahme auf, in welche der Leiter eingeschweißt ist. Herkömmlicherweise werden solche Kabelschuhe als Presskabelschuhe bezeichnet. Hier wird die Leiteraufnahme jedoch mit dem Leiter verschweißt. Insbesondere ist der Leiter eine Aluminiumstange, welche mit der hülsenförmigen Leiteraufnahme eine Übergangs- oder Presspassung bildet. Alternativ weist die Aluminiumstange einen größeren Querschnitt als die hülsenförmige Leiteraufnahme auf, wobei dann der Leiter weitergebildet an seinem in die Leiteraufnahme des Kabelschuhs eingeführten Ende, insbesondere durch mechanische Umformung, an die Innenkontur der Leiteraufnahme angepasst sein kann, beispielsweise flachgedrückt ist, und somit zu dieser komplementär ausgestaltet ist. Eine weitere Variante besteht darin, dass der Leiter zum Anschweißen, beispielsweise an einen Aluminiumrohbau eines Schienenfahrzeugs des Personenverkehrs, an seinem freien, der Leiteraufnahme gegenüberliegendem Ende mechanische umgeformt ist. So wird beispielsweise der Leiter als Aluminiumstange mit einem kreisförmigen Querschnitt mit zwei Enden angeliefert. Dieser wird mit einem ersten Ende mit einer komplementär und entsprechend kreisförmig ausgebildeten Leiteraufnahme verbunden. Ein Anschweißen des Leiters an seinem freien, zweiten Ende wird dadurch erleichtert, dass der Querschnitt des Leiters näherungsweise rechteckig ist. Um dies zu realisieren wird der Leiter an seinem freien, zweiten Ende entsprechend mechanisch umgeformt, beispielsweise flachgedrückt.According to a development of the earthing strap according to the invention, the cable lug has a closed, sleeve-shaped conductor receiving, in which the conductor is welded. Conventionally, such cable lugs are referred to as compression cable lugs. Here, however, the conductor receptacle is welded to the conductor. In particular, the conductor is an aluminum rod, which forms a transition or press fit with the sleeve-shaped conductor receiving. Alternatively, the aluminum rod has a larger cross section than the sleeve-shaped conductor receiving, in which case the conductor further educated at its inserted into the conductor receiving the cable lug end, in particular by mechanical deformation, can be adapted to the inner contour of the conductor receiving, for example, is flattened, and thus to this is designed complementary. A further variant is that the conductor for welding, for example, to a Aluminiumrohbau a rail vehicle of passenger traffic, at its free, the conductor receiving opposite end is mechanically deformed. For example, the ladder is supplied as an aluminum rod having a circular cross-section with two ends. This is connected to a first end with a complementary and correspondingly circular conductor receiving. Welding of the conductor at its free, second end is facilitated by the cross section of the conductor being approximately rectangular. To realize this, the ladder will be at its free, second End corresponding mechanically transformed, for example, flattened.

Eine weitere Weiterbildung der Erfindung sieht vor, dass die Erdungslasche eine Öse oder eine Gabel zur Befestigung der Erdungslasche, beispielsweise mit weiteren Kabelschuhen, und eine Basis aufweist, welche Basis eine Stirnseite der Leiteraufnahme und damit auch der Erdungslasche bildet, wobei die Erdungslasche von der Basis zur Öse sich verjüngend ausgestaltet ist. Eine Dicke der Basis ist somit größer als eine Dicke der Öse oder der Gabel.A further development of the invention provides that the earthing strap has an eyelet or a fork for fastening the earthing strap, for example with further cable lugs, and a base, which base forms an end face of the ladder receptacle and thus also the earthing strap, the earthing strap being from the base to the eyelet is tapered designed. A thickness of the base is thus greater than a thickness of the eyelet or fork.

In einer weiteren Weiterbildung der erfindungsgemäßen Lösung umfasst ein Erdungsanschluss eine erfindungsgemäße Erdungslasche und einen mit der Erdungslasche, insbesondere galvanisch verbundenen, weiteren Kabelschuh welcher beispielsweise baugleich mit dem Kabelschuh der Erdungslasche ist, wobei der weitere Kabelschuh eine Öse oder eine Gabel und eine im Bereich der Öse oder der Gabel im Wesentlichen konstante Dicke aufweist, und wobei der weitere Kabelschuh eine Verdickung, beispielsweise zur Aufnahme eines Leiters, aufweist, wobei die erfindungsgemäße Erdungslasche eine Öse oder eine Gabel und im Bereich der Öse oder der Gabel eine im Wesentlichen konstante Dicke aufweist, und sich in einem Winkelbereich von zumindest 120°, insbesondere von zumindest 180°, um einen Mittelpunkt der Öse oder der Gabel, insbesondere von der Basis wegweisend, höchstens in einem Maß um den Mittelpunkt ausdehnt, welches kleiner ist als ein Abstand von einem Mittelpunkt der Öse des weiteren Kabelschuhs zu der Verdickung des weiteren Kabelschuhs. Zwei ähnlich oder gar gleich ausgestaltete Kabelschuhe lassen sich somit um die gemeinsame Achse ihrer Ösen, durch welche sie miteinander in Verbindung stehen, in einem weiten Winkelbereich proportional zum angegebenen Winkelbereich gegeneinander verdrehen.In a further development of the solution according to the invention, a grounding connection comprises a grounding lug according to the invention and another grounding lug, in particular galvanically connected, which is, for example, identical to the lug of the grounding lug, the further lug being an eyelet or a fork and one in the region of the eyelet or the fork has a substantially constant thickness, and wherein the further cable lug has a thickening, for example for receiving a conductor, wherein the grounding lug according to the invention comprises an eyelet or a fork and in the region of the eyelet or the fork has a substantially constant thickness, and extending in an angular range of at least 120 °, in particular of at least 180 °, around a center of the eyelet or fork, in particular pointing away from the base, at most to a degree about the center, which is smaller than a distance from a center of the eyelet Furthermore Cable lug to the thickening of the other cable lug. Two similar or even identically designed cable lugs can thus be rotated about the common axis of their eyes, through which they communicate with each other, in a wide angular range proportional to the specified angular range against each other.

Eine Weiterbildung der Lösung ist darin zu sehen, dass die Erdungslasche eine Öse oder eine Gabel und eine Leiteraufnahme aufweist, welche Öse oder Gabel in einem Winkel größer 30° und kleiner 60°, insbesondere in einem Winkel von näherungsweise 45°, zu einer Längsachse der Leiteraufnahme geneigt ist.A further development of the solution is the fact that the grounding tab has an eyelet or a fork and a conductor receptacle, which eyelet or fork at an angle greater than 30 ° and less than 60 °, in particular at an angle of approximately 45 °, is inclined to a longitudinal axis of the conductor receiving.

Ein erfindungsgemäßes Schienenfahrzeug, insbesondere des Personenverkehrs, umfasst einen Aluminiumrohbau und an dem Aluminiumrohbau erfindungsgemäß angefügte Kabelschuhe, insbesondere aus Kupfer, als Erdungslaschen. Um die Kabelschuhe anzufügen weist der Aluminiumrohbau entsprechend ausgeformte Aluminiumleiter auf, welche an den Aluminiumrohbau angefügt sind oder aus dem Aluminiumrohbau fügestellenfrei ausgeformt sind.A railway vehicle according to the invention, in particular passenger transport, comprises an aluminum shell construction and cable lugs attached to the aluminum shell according to the invention, in particular of copper, as ground lugs. To attach the cable lugs, the aluminum shell has correspondingly shaped aluminum conductors, which are attached to the aluminum shell or are formed without joints from the aluminum shell.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Sie wird anhand der nachfolgenden Figuren näher erläutert, in denen jeweils ein Ausgestaltungsbeispiel dargestellt ist. Gleiche Elemente in den Figuren sind mit gleichen Bezugszeichen versehen.

Fig. 1
zeigt ein erstes Ausführungsbeispiel einer erfindungsgemäßen Erdungslasche in einer Draufsicht,
Fig. 2
zeigt die Erdungslasche aus Fig. 1 in einer Seitenansicht,
Fig. 3
zeigt ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Erdungslasche in einer Draufsicht,
Fig. 4
zeigt die Erdungslasche aus Fig. 3 in einer Seitenansicht,
Fig. 5
zeigt eine Erdungslasche des Stands der Technik in einer ersten Sicht,
Fig. 6
zeigt die Erdungslasche aus Fig. 5 in einer zweiten Sicht,
Fig. 7
zeigt die Erdungslasche aus Fig. 5 in einer dritten Sicht.
The invention allows numerous embodiments. It will be explained in more detail with reference to the following figures, in each of which a design example is shown. Identical elements in the figures are provided with the same reference numerals.
Fig. 1
shows a first embodiment of a grounding tab according to the invention in a plan view,
Fig. 2
shows the grounding tab Fig. 1 in a side view,
Fig. 3
shows a further embodiment of a grounding tab according to the invention in a plan view,
Fig. 4
shows the grounding tab Fig. 3 in a side view,
Fig. 5
shows a grounding tab of the prior art in a first view,
Fig. 6
shows the grounding tab Fig. 5 in a second view,
Fig. 7
shows the grounding tab Fig. 5 in a third view.

In Fig. 1 und Fig. 2 ist eine erfindungsgemäße Erdungslasche 1 in einer Vorderansicht und in einer Seitenansicht jeweils teilgeschnitten dargestellt. Sie weist einen Kabelschuh 2 und einen Leiter 3 auf, welche miteinander verbunden sind. Die Verbindung ist mittels elektromagnetischer Pulsumformtechnologie hergestellt. Dazu ist der Leiter 3 in eine Leiteraufnahme 4 des Kabelschuhs 2 eingeführt. Da der Kabelschuh 2 insbesondere ein aus dem Stand der Technik bekanntes, standardisiertes Zukaufteil ist, ist der Leiter 3 entsprechend komplementär zur Leiteraufnahme 4 ausgeformt. Hier weist er einen kreisförmigen Querschnitt auf und ist an die Innenkontur der Leiteraufnahme 4 angepasst. Durch Quetschen ist sein freies Ende zum Anschweißen entlang einer Schweißnaht an ein weiteres Bauteil mechanisch umgeformt.In Fig. 1 and Fig. 2 is a grounding tab 1 according to the invention in a front view and in a side view each shown partially cut. It has a cable lug 2 and a conductor 3, which are interconnected. The connection is by means of electromagnetic pulse forming technology produced. For this purpose, the conductor 3 is inserted into a conductor receptacle 4 of the cable lug 2. Since the cable lug 2 is in particular a standardized purchased part known from the prior art, the conductor 3 is formed correspondingly complementary to the conductor receptacle 4. Here it has a circular cross section and is adapted to the inner contour of the conductor receptacle 4. By squeezing its free end is mechanically formed to weld along a weld to another component.

Die Leiteraufnahme 4 ist dagegen hülsenförmig ausgestaltet und umschließt den Leiter 3. Sie weist hier einen über die Länge der Leiteraufnahme 4 konstanten Innen- und Außenquerschnitt auf. Eine Basis 5 bildet eine erste Stirnseite des Kabelschuhs 2. Auch sie weist diesen konstanten Innen- und Außenquerschnitt auf. Des Weiteren umfasst der Kabelschuh 2 eine Öse 6. Die Öse 6 ist hier als Bohrung ausgestaltet mit einer Bohrungslängsachse als Achse 7 der Öse 6. Zur Öse 6 hin verjüngt sich der Kabelschuh 2 der Erdungslasche 1. Die Achse 7 bildet in der Vorderansicht den Mittelpunkt der Öse 6 in der Zeichenebene ab.On the other hand, the conductor receptacle 4 is sleeve-shaped and encloses the conductor 3. It has a constant internal and external cross-section over the length of the conductor receptacle 4. A base 5 forms a first end face of the cable lug 2. It also has this constant inner and outer cross-section. The eyelet 6 is designed here as a bore with a bore longitudinal axis as the axis 7 of the eyelet 6 to eyelet 6 towards the cable lug 2 tapers the grounding lug 1. The axis 7 forms the center in front view the eyelet 6 in the plane from.

Im Bereich der Öse 6 weist die Erdungslasche 1 eine im Wesentlichen konstante Dicke auf. Darüber hinaus weist sie, hier im Bereich einer zweiten, der Basis 5 gegenüberliegenden Stirnseite, in einem Winkelbereich α von hier ungefähr 270° um einen Mittelpunkt 7 der Öse 6, einen Abstand von einer die Erdungslasche 1 begrenzenden Kontur zum Mittelpunkt 7 der Öse 6 auf, welcher kleiner ist als ein Abstand von einem Mittelpunkt einer Öse eines weiteren Kabelschuhs zu der Verdickung des weiteren Kabelschuhs. Da der weitere Kabelschuh insbesondere baugleich ausgestaltet ist, dehnt sich der Kabelschuh 2 der erfindungsgemäßen Erdungslasche 1 im vorgegebenen Winkelbereich somit höchstens soweit um den Mittelpunkt 7 seiner Öse 6 aus, wie der Abstand des Mittelpunkts 7 der Öse 6 zur Leiteraufnahme 4 aufweist. Dabei weist der Bereich im vorgegebenen Winkelbereich konstante Dicke auf. Die Leiteraufnahme 4 hingegen weist eine größere Dicke auf. Darüber hinaus ist der Bereich im vorgegebenen Winkelbereich beispielsweise halbkreisförmig ausgeformt. Der Winkelbereich von 270° ist lediglich als Beispielhaft anzusehen. Auch kleinere Winkelbereiche, beispielsweise 180° und entsprechend parallel zur Basis 5 und die Achse 7 schneidend, sind denkbar.In the region of the eyelet 6, the grounding tab 1 has a substantially constant thickness. In addition, it has, here in the region of a second, the base 5 opposite end face, in an angular range α from here about 270 ° about a center 7 of the eyelet 6, a distance from a grounding tab 1 limiting contour to the center 7 of the eyelet 6 which is smaller than a distance from a center of an eyelet of another cable lug to the thickening of the further cable lug. Since the other cable lug is configured in a particularly identical manner, the cable lug 2 of the grounding lug 1 according to the invention expands at most within the predetermined angular range about the center 7 of its lug 6, as the distance between the center 7 of the lug 6 and the conductor receptacle 4 has. In this case, the area in the predetermined angular range constant thickness. The conductor receptacle 4, however, has a greater thickness. In addition, it is the area in the predetermined angular range, for example, formed semicircular. The angular range of 270 ° is to be regarded as exemplary only. Even smaller angular ranges, for example 180 ° and correspondingly parallel to the base 5 and the axis 7 cutting, are conceivable.

Die Achse 7 der Öse 6 schneidet in diesem Ausführungsbeispiel eine Längsachse 8 der Leiteraufnahme 4 senkrecht. Die Öse 6 der in Fig. 3 und Fig. 4 veranschaulichten Erdungslasche weist hingegen einen Winkel von näherungsweise 45° zu einer Längsachse 8 der Leiteraufnahme 4 auf. Die Öse 6 ist eine Bohrung in einer Ebene konstanter Dicke des Kabelschuhs 2, welche Ebene zur Längsachse 8 der Leiteraufnahme 4 geneigt ist. Eine Öse 6 mit einer Achse parallel zur Längsachse 8 der Leiteraufnahme 4 ist hier nicht zeichnerisch ausgeführt.The axis 7 of the eyelet 6 intersects in this embodiment, a longitudinal axis 8 of the conductor receiving 4 vertically. The eyelet 6 of in FIG. 3 and FIG. 4 On the other hand, the earthing strap illustrated has an angle of approximately 45 ° to a longitudinal axis 8 of the conductor receiving means 4. The eyelet 6 is a bore in a plane of constant thickness of the cable lug 2, which plane is inclined to the longitudinal axis 8 of the conductor receptacle 4. An eyelet 6 with an axis parallel to the longitudinal axis 8 of the conductor receptacle 4 is not shown here in the drawing.

Der Leiter 3 ist in beiden skizzierten Ausführungsbeispielen eine Stange aus Aluminium, welche an einen Aluminiumrohbau eines Schienenfahrzeugs angeschweißt ist, angedeutet durch die Schweißnaht 9. Alternativ ist der Leiter 3 in geeigneter Art und Weise mit dem Rohbau stoffschlüssig verbunden, so dass ein Übergangswiderstand zwischen Leiter und Rohbau gering ist.The conductor 3 is in both outlined embodiments, a rod made of aluminum, which is welded to a Aluminiumrohbau a rail vehicle, indicated by the weld 9. Alternatively, the conductor 3 in a suitable manner cohesively connected to the shell, so that a contact resistance between conductors and shell construction is low.

Auch hier sind der Kabelschuh 2 und der Leiter 3 mit Hilfe der Elektromagnetischen Pulsumformtechnologie verbunden, insbesondere damit ein Übergangswiderstand zwischen Leiter und Kabelschuh 2 gering ist.Again, the cable lug 2 and the conductor 3 are connected by means of electromagnetic pulse forming technology, in particular so that a contact resistance between the conductor and cable lug 2 is low.

In den Fig. 5, Fig. 6 und Fig. 7 ist eine Erdungslasche aus dem Stand der Technik dargestellt. Ein rechteckförmige Stange aus Aluminium mit der Höhe h und der Breite b ist in eine Hülse aus verzinntem Kupfer mit der Breite B und der Höhe H verpresst. Die Aluminiumstange steht dabei mit einer Länge 1 aus der Kupferhülse über. Die Erdungslasche weist die Länge L auf und ist mit einer Bohrung mit dem Durchmesser D versehen.In the Fig. 5, Fig. 6 and Fig. 7 a grounding tab of the prior art is shown. A rectangular aluminum rod of height h and width b is pressed into a tinned copper sleeve of width B and height H. The aluminum rod stands with a length 1 of the copper sleeve over. The grounding tab has the length L and is provided with a bore of diameter D.

Claims (10)

Erdungslasche (1), umfassend einen Kabelschuh (2) und einen Leiter (3), dadurch gekennzeichnet, dass der Kabelschuh (2) und der Leiter (3) miteinander verschweißt sind, wobei die Schweißverbindung mittels elektromagnetischer Pulsumformtechnologie hergestellt ist.A grounding strap (1) comprising a lug (2) and a conductor (3), characterized in that the lug (2) and the conductor (3) are welded together, the weld being made by means of electromagnetic pulse forming technology. Erdungslasche nach Anspruch 1, dadurch gekennzeichnet, dass der Kabelschuh (2) Kupfer umfasst.Grounding tab according to claim 1, characterized in that the cable lug (2) comprises copper. Erdungslasche nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Leiter (3) Aluminium umfasst.Grounding tab according to one of claims 1 or 2, characterized in that the conductor (3) comprises aluminum. Erdungslasche nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Kabelschuh (2) eine einseitig geschlossene, hülsenförmige Leiteraufnahme (4) aufweist, in welche der Leiter (3) eingeführt und mit welcher der Leiter (3) verschweißt ist.Grounding lug according to one of claims 1 to 3, characterized in that the cable lug (2) has a closed on one side, sleeve-shaped conductor receptacle (4), in which the conductor (3) is inserted and with which the conductor (3) is welded. Erdungslasche nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Leiter (3) an einem in die Leiteraufnahme (4) des Kabelschuhs (2) eingeführten Ende, insbesondere durch mechanische Umformung, an die Innenkontur der Leiteraufnahme (4) angepasst ist.Grounding tab according to one of claims 1 to 4, characterized in that the conductor (3) is adapted to a in the conductor receptacle (4) of the cable lug (2) inserted end, in particular by mechanical deformation, to the inner contour of the conductor receptacle (4). Erdungslasche nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sie eine Öse (6) aufweist, welche in einem Winkel größer 30° und kleiner 60° zu einer Längsachse der Leiteraufnahme (4) geneigt ist.Grounding tab according to one of claims 1 to 5, characterized in that it comprises an eyelet (6) which is inclined at an angle greater than 30 ° and less than 60 ° to a longitudinal axis of the conductor receptacle (4). Erdungslasche nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sie eine Öse (6) und eine Basis (5) aufweist, welche Basis (5) eine Stirnseite der Leiteraufnahme (4) bildet, wobei sich die Erdungslasche (1) von der Basis (4) bis zur Öse (6) verjüngt.Grounding tab according to one of claims 1 to 6, characterized in that it comprises an eyelet (6) and a base (5), which base (5) forms an end face of the conductor receptacle (4), wherein the grounding tab (1) of the Base (4) to the eyelet (6) tapers. Erdungsanschluss mit einer Erdungslasche (1) nach einem der Ansprüche 1 bis 7 und einem mit der Erdungslasche (1) verbundenen Kabelschuh, dadurch gekennzeichnet, dass der Kabelschuh eine Öse und eine im Bereich der Öse im Wesentlichen konstante Dicke aufweist, und dass der Kabelschuh eine Verdickung in einem Bereich einer Leiteraufnahme aufweist, und dass die Erdungslasche (1) eine Öse (6) und im Bereich der Öse (6) eine im Wesentlichen konstante Dicke aufweist, und sich in einem Winkelbereich von zumindest 120° um einen Mittelpunkt der Öse (6) höchstens in einem Maß um den Mittelpunkt ausdehnt, welches kleiner ist als ein Abstand von einem Mittelpunkt der Öse des Kabelschuhs zu der Verdickung des Kabelschuhs (2).Grounding connection with a grounding tab (1) according to one of claims 1 to 7 and a grounding lug (1) connected to the lug, characterized in that the lug has an eyelet and a substantially constant thickness in the region of the eyelet, and that the cable lug a Has thickening in a region of a conductor receiving, and that the grounding tab (1) has an eyelet (6) and in the region of the eyelet (6) has a substantially constant thickness, and at an angular range of at least 120 ° about a center of the eyelet ( 6) at most extends to an extent about the center, which is smaller than a distance from a center of the eye of the cable lug to the thickening of the cable lug (2). Verfahren zum Herstellen einer Erdungslasche (1), dadurch gekennzeichnet, dass ein Leiter (3) in eine Leiteraufnahme (4) eines Kabelschuhs (2) eingeführt und mittels elektromagnetischer Pulsumformtechnologie mit dem Kabelschuh (2) verschweißt wird.Method for producing a grounding strap (1), characterized in that a conductor (3) is inserted into a conductor receptacle (4) of a cable lug (2) and welded to the cable lug (2) by means of electromagnetic pulse forming technology. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass ein in die Leiteraufnahme (4) des Kabelschuhs (2) eingeführtes Ende des Leiters (3) vor dem Einführen in die Leiteraufnahme (4) des Kabelschuhs (2) durch mechanische Umformung an die Innenkontur der Leiteraufnahme (4) angepasst wird.Method according to Claim 9, characterized in that an end of the conductor (3) introduced into the conductor receptacle (4) of the cable lug (2) before being inserted into the conductor receptacle (4) of the cable lug (2) is formed by mechanical deformation on the inner contour of the conductor receptacle (4) is adjusted.
EP13182781.8A 2012-09-05 2013-09-03 Grounding tab Withdrawn EP2705996A3 (en)

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WO2017102803A1 (en) * 2015-12-16 2017-06-22 Siemens Ag Österreich Rail vehicle body comprising an earthing point
WO2018059981A1 (en) * 2016-09-29 2018-04-05 Siemens Aktiengesellschaft Bolt-welded grounding lug
WO2019016347A1 (en) * 2017-07-21 2019-01-24 Siemens Aktiengesellschaft Grounding device for vehicles

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CN107123867B (en) * 2017-06-05 2019-05-10 吉林省中赢高科技有限公司 A kind of connector and its magnetic induction welding method of copper tip and aluminum conductor
DE102018220737A1 (en) * 2018-11-30 2020-01-02 Siemens Mobility GmbH Grounding strap, method of making an grounding strap and rail vehicle

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DE10357048A1 (en) 2003-12-04 2005-07-21 Leoni Bordnetz-Systeme Gmbh & Co Kg Method for producing an electrical connection between an aluminum conductor and a contact element
EP1766727A1 (en) * 2004-06-17 2007-03-28 Pulsar Welding Ltd. Bi-metallic connectors, method for producing the same, and method for connecting the same to a structure
EP2130738B1 (en) * 2008-06-06 2017-03-15 Bombardier Transportation GmbH Rail vehicle car body and method of assembly

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WO2017102803A1 (en) * 2015-12-16 2017-06-22 Siemens Ag Österreich Rail vehicle body comprising an earthing point
WO2018059981A1 (en) * 2016-09-29 2018-04-05 Siemens Aktiengesellschaft Bolt-welded grounding lug
WO2019016347A1 (en) * 2017-07-21 2019-01-24 Siemens Aktiengesellschaft Grounding device for vehicles

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