EP1360744A1 - Fixing for an electrical contact - Google Patents

Fixing for an electrical contact

Info

Publication number
EP1360744A1
EP1360744A1 EP02708232A EP02708232A EP1360744A1 EP 1360744 A1 EP1360744 A1 EP 1360744A1 EP 02708232 A EP02708232 A EP 02708232A EP 02708232 A EP02708232 A EP 02708232A EP 1360744 A1 EP1360744 A1 EP 1360744A1
Authority
EP
European Patent Office
Prior art keywords
spacer ring
screw
electrical contact
cavity
weld nut
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Withdrawn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
EP02708232A
Other languages
German (de)
French (fr)
Inventor
Manfred Müller
Eckhard Blank
Roland Kurz
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.)
Newfrey LLC
Original Assignee
Newfrey LLC
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 Newfrey LLC filed Critical Newfrey LLC
Publication of EP1360744A1 publication Critical patent/EP1360744A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/34—Conductive members located under head of screw
    • 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
    • H01R43/0263—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 for positioning or holding parts during soldering or welding process

Definitions

  • the invention relates to a weldable attachment for an electrical contact, in particular for a ground connection.
  • Weldable fasteners are used, for example, in automotive engineering, where they are used to produce an electrical ground contact. From EP 0 640 404 it is known how such an electrical contact is attached to a metal sheet. In order to avoid contamination of the electrical contact surfaces, a protective cap is placed on a threaded bolt. This bolt with a protective cap is then connected to the metal sheet by welding. The protective cap has the particular task of protecting the thread of the bolt from subsequent contamination, in particular paint, which would prevent electrical contact when a cable is attached or screwed on.
  • known mass bolts of this type have a relatively high overall height, which is not always desirable.
  • the resulting connections, especially after welding to thin structures, can only absorb limited torques.
  • the weldable attachment according to the invention for an electrical contact comprises a weld nut which has an electrical contact surface on its upper side and an annular axial extension on its underside, which surrounds a cavity of a predeterminable depth, and a screw screwed into the weld nut, which is also an electrical one Has contact surface, wherein a spacer ring is clamped between the contact surfaces.
  • the nut, spacer ring and screw are assembled and handled as one unit and welded on.
  • the electrical contact surfaces between the screw and the weld nut are protected against contamination with the aid of the clamped-in spacer ring.
  • the contact surfaces therefore remain clean during transport, handling, the welding process and later painting processes. Later, by unscrewing the screw, removing the spacer ring, attaching a contact ring and screwing the screw back on again, good quality electrical contact can be made. Due to the large diameter of the welding nut, in contrast to a conventional welding stud, which usually has a smaller diameter, a higher torque can be absorbed. In addition, welding with smaller sheet thicknesses, i.e. less than 0.6 mm, possible. The welding of a nut with a ring-shaped extension, suitable shapes and dimensions and the systems required for this are generally known in the prior art.
  • a contact produced in this way is preferably a ground contact for voltages between 6 and 42 volts, in particular in a motor vehicle.
  • the present invention is particularly suitable.
  • the spacer ring consists of elastic material, in particular polyethylene. This allows the parts to be securely held together during pre-assembly.
  • the spacer ring protects as a seal against paint wetting and other contaminants. This function is important if, for example, the workpiece is given one or more varnishes before a contact ring is attached.
  • the spacer ring has a thickness that is approximately equal to the depth of the cavity in the welded state. This is particularly important in connection with a further preferred embodiment of the invention, according to which the end of the screw, when the spacer ring is tensioned, is approximately flush with the end of the internal thread of the weld nut.
  • the latter means that neither the external thread of the screw nor the internal thread of the weld nut can be contaminated by metal splashes during welding. This allows the screw to be easily removed and screwed in later.
  • the screw with the dimensioning of the spacer ring mentioned above cannot hit the workpiece even when fully tightened, since the end of the screw can protrude into the cavity by a maximum of an excess that is the thickness of the spacer ring minus Corresponds to the thickness of the contact ring.
  • the specified matching of the dimensions of all parts to one another is therefore particularly advantageous for the present invention.
  • Fig. 1 is a weldable attachment according to the invention in longitudinal section
  • Fig. 2. the welded attachment according to Fig. 1, in which the spacer ring is removed and an electrical line is attached.
  • Fig. 1 shows a weldable attachment according to the invention for an electrical contact. It comprises a weld nut 1, which has an electrical contact surface 9 on its upper side and an annular axial extension 6 on its underside, which surrounds a cavity 4 of a predeterminable depth T, and with a screw 3 screwed into the weld nut 1, which is also an electrical one Has contact surface 9, wherein a spacer ring 2 is clamped between the contact surfaces 9.
  • the spacer ring 2 is shaped such that it essentially covers the contact surfaces 9 and is securely clamped between them.
  • the screw 3 and the welding nut 1 are braced against one another, so that loosening of the screw 3 from the welding nut 1 is prevented even under heavy mechanical stress (for example due to vibrations during transport or handling) due to the comparatively high static friction becomes.
  • the spacer ring 2 seals the screw 3 against the weld nut 1 and prevents the ingress of contaminants or paint to the contact surfaces and into the interior of the preassembled combination.
  • the end 5 of the screw 3 with an external thread 13 is flush with the end of the internal thread 12 of the weld nut 1.
  • a workpiece 7 which can also consist of a thin sheet of less than 0.6 mm thickness, for example, no metal splashes can occur deposit on the threads and later hinder disassembly or assembly.
  • the thickness D of the spacer ring 2 is advantageously approximately the same as the depth T of the cavity 4. As a result, the screw cannot later strike the workpiece 7 when the spacer ring 2 is replaced by an electrical contact ring.
  • FIG. 2 shows the completely assembled fastening according to the invention according to FIG. 1, in which an electrical line 10 with a contact ring 8 is clamped in place of the spacer ring 2 between the contact surfaces 9 of screw 3 and weld nut 1. Relatively high currents can be conducted and high torques can be absorbed via the annular welded connection 11.
  • the screwed-in screw 3 at its end 5 reaches at most a protrusion d into the cavity 4 which corresponds to the thickness D of the former spacer ring 2 minus the thickness of the contact ring 8 and can therefore not touch the workpiece 7 and therefore not the weld connection 11 damage if the spacer ring 2 previously had a thickness D like the depth T of the cavity 4.
  • the invention is particularly suitable for use in series production in which automatic tools are used.
  • the prefabricated unit consisting of weld nut, spacer ring and screw can be handled and welded like other welded parts and is suitable for welding to thin sheets, for contacts with a low overall height and high loads.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connection Of Plates (AREA)

Abstract

The invention relates to a weldable fixing for an electrical contact, comprising a weld nut (1) that is provided on its top with an electrical contact area (9) and on its bottom with an annular axial projection (6) that surrounds a cavity (4) having a predetermined depth (T), and a screw (3) screwed into the weld nut (1), said screw also having an electrical contact area (9). Between the contact areas (9) a spacer ring (2) is clamped. Said spacer ring (2) preferably has a thickness (D) that approximately equals the depth (T) of the cavity (4). When the spacer ring (2) is clamped, the screw (3) is approximately flush with the end of the inner thread (12) of the weld nut (1). The inventive combination is characterized in that that it has reduced overall height, no metal splatter is disposed on the thread (12) during welding, the contact areas (9) are protected during assembly, and the welded connection can receive high torques even when welded onto thin work pieces (7).

Description

Befestigung für einen elektrischen Kontakt Attachment for an electrical contact
Die Erfindung betrifft eine anschweissbare Befestigung für einen elektrischen Kontakt, insbesondere für einen Masseanschluß.The invention relates to a weldable attachment for an electrical contact, in particular for a ground connection.
Anschweißbare Befestigungen werden beispielsweise in der Kraftfahrzeugtechnik verwendet, wo sie zur Herstellung eines elektrischen Massekontaktes Verwendung finden. Aus der EP 0 640 404 ist bekannt, wie ein derartiger elektrischer Kontakt an einem Metallblech befestigt wird. Um Verunreinigungen der elektrischen Kontaktflächen zu vermeiden, wird eine Schutzkappe auf einen mit einem Gewinde versehenen Bolzen gebracht. Dieser Bolzen mit Schutzkappe wird dann mit dem Metallblech durch Schweißen verbunden. Die Schutzkappe hat insbesondere die Aufgabe, das Gewinde des Bolzens vor einer nachträglichen Verunreinigung, insbesondere Farbe, zu schützen, die bei der Anbringung bzw. der Anschraubung eines Kabels einen elektrischen Kontakt verhindern würden.Weldable fasteners are used, for example, in automotive engineering, where they are used to produce an electrical ground contact. From EP 0 640 404 it is known how such an electrical contact is attached to a metal sheet. In order to avoid contamination of the electrical contact surfaces, a protective cap is placed on a threaded bolt. This bolt with a protective cap is then connected to the metal sheet by welding. The protective cap has the particular task of protecting the thread of the bolt from subsequent contamination, in particular paint, which would prevent electrical contact when a cable is attached or screwed on.
Einerseits weisen bekannte Massenbolzen dieser Art eine relativ hohe Bauhöhe auf, was nicht immer erwünscht ist. Anderseits ist ein Anschweißen von bekannten Massenbolzen an Blechen von weniger als 0,6 mm Stärke schwierig durchführbar. Darüber hinaus können die entstehenden Verbindungen, insbesondere nach Anschweißen an dünne Strukturen, nur begrenzte Drehmomente aufnehmen.On the one hand, known mass bolts of this type have a relatively high overall height, which is not always desirable. On the other hand, it is difficult to weld known bulk bolts to sheets of less than 0.6 mm in thickness. In addition, the resulting connections, especially after welding to thin structures, can only absorb limited torques.
Es ist daher Aufgabe der Erfindung, die genannten Nachteile zu überwinden und eine anschweissbare Befestigung anzugeben, die eine sichere Anbringung eines elektrischen Kontakts bei geringer Bauhöhe erlaubt. Diese Aufgabe wird gelöst durch die Merkmale des Anspruchs 1. Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der abhängigen Ansprüche.It is therefore an object of the invention to overcome the disadvantages mentioned and to provide a weldable attachment which allows a secure attachment of an electrical contact with a low overall height. This object is achieved by the features of claim 1. Further advantageous refinements of the invention are the subject of the dependent claims.
Die erfindungsgemäße anschweissbare Befestigung für einen elektrischen Kontakt umfasst eine Schweißmutter, die an ihrer Oberseite eine elektrische Kontal tfläche und an ihrer Unterseite einen ringförmigen axialen Fortsatz aufweist, der einen Hohlraum einer vorgebbaren Tiefe umgibt, und eine in die Schweißmutter eingeschraubten Schraube, die ebenfalls eine elektrische Kontaktfläche aufweist, wobei zwischen den Kontaktflächen ein Distanzring eingeklemmt ist. Mutter, Distanz- ring und Schraube werden zusammengebaut als Einheit gehandhabt und angeschweißt. Durch das Anschweißen des ringförmigen Fortsatzes der Schweißmutter an einem Metallblech wird im Gegensatz zu einem vergleichbar großen herkömmlichen Schweißbolzen ein größerer Außendurchmesser der Schweißverbindung erreicht, so dass eine Aufnahme von höheren Drehmomenten erzielt wird. Die elektrischen Kontaktflächen zwischen Schraube und Schweißmutter werden mit Hilfe des eingeklemmten Distanzrings vor Verunreinigungen geschützt. Die Kontaktflächen bleiben daher beim Transport, bei der Handhabung, beim Schweißvorgang und bei späteren Lackiervorgängen sauber. Später kann dann durch Abschrauben der Schraube, Entfernen des Distanzrings, Aufstecken eines Kontaktringes und erneutes Festschrauben der Schraube ein elelctrischer Kontakt mit guter Qualität hergestellt werden. Durch den großen Durchmesser der Schweißmutter kann im Gegensatz zu einem herkömmlichen Schweißbolzen, der in der Regel einen geringeren Durchmesser hat, ein höheres Drehmoment aufgenommen werden. Außerdem sind hiermit Verschweißungen mit geringeren Blechdicken, d.h. unter 0,6 mm, möglich. Das Anschweißen einer Mutter mit ringförmigem Fortsatz, dafür geeignete Formen und Maße und die dafür notwendigen Anlagen sind generell im Stand der Technik bekannt.The weldable attachment according to the invention for an electrical contact comprises a weld nut which has an electrical contact surface on its upper side and an annular axial extension on its underside, which surrounds a cavity of a predeterminable depth, and a screw screwed into the weld nut, which is also an electrical one Has contact surface, wherein a spacer ring is clamped between the contact surfaces. The nut, spacer ring and screw are assembled and handled as one unit and welded on. By welding the ring-shaped extension of the welding nut onto a metal sheet, in contrast to a comparable large conventional welding stud, a larger outside diameter of the welded connection is achieved, so that higher torques can be absorbed. The electrical contact surfaces between the screw and the weld nut are protected against contamination with the aid of the clamped-in spacer ring. The contact surfaces therefore remain clean during transport, handling, the welding process and later painting processes. Later, by unscrewing the screw, removing the spacer ring, attaching a contact ring and screwing the screw back on again, good quality electrical contact can be made. Due to the large diameter of the welding nut, in contrast to a conventional welding stud, which usually has a smaller diameter, a higher torque can be absorbed. In addition, welding with smaller sheet thicknesses, i.e. less than 0.6 mm, possible. The welding of a nut with a ring-shaped extension, suitable shapes and dimensions and the systems required for this are generally known in the prior art.
Bevorzugt ist ein so hergestellter Kontakt ein Massekontakt für Spannungen zwi- sehen 6 und 42 Volt, insbesondere in einem Kraftfahrzeug. Für solche Anwen- düngen in einer Serienproduktion eignet sich die vorliegende Erfindung besonders.A contact produced in this way is preferably a ground contact for voltages between 6 and 42 volts, in particular in a motor vehicle. For such applications fertilize in series production, the present invention is particularly suitable.
Bei einer bevorzugten Ausführungsform der Erfindung besteht der Distanzring aus elastischem Material, insbesondere Polyäthylen. Dadurch lässt sich bei der Vormontage ein sicherer Halt der Teile untereinander erreichen.In a preferred embodiment of the invention, the spacer ring consists of elastic material, in particular polyethylene. This allows the parts to be securely held together during pre-assembly.
In einer besonderen Weiterbildung der Erfindung schützt der Distanzring als Dichtung gegen Lackbenetzung und andere Verunreinigungen. Diese Funktion ist dann wichtig, wenn beispielsweise das Werkstück vor dem Anbringen eines Kontaktringes noch eine oder mehrere Lackierungen erhält.In a special development of the invention, the spacer ring protects as a seal against paint wetting and other contaminants. This function is important if, for example, the workpiece is given one or more varnishes before a contact ring is attached.
In einer besonders vorteilhaften Weiterbildung der Erfindung hat der Distanzring eine Dicke, die etwa gleich der Tiefe des Hohlraums im geschweißten Zustand ist. Dies ist insbesondere in Verbindung mit einer weiteren bevorzugten Ausführungs- form der Erfindung von Bedeutung, nach der das Ende der Schraube bei verspanntem Distanzring etwa bündig mit dem Ende des Innengewindes der Schweißmutter abschließt. Letzteres bewirkt, dass beim Schweißen weder das Außengewinde der Schraube, noch das Innengewinde der Schweißmutter durch Metallspritzer verunreinigt werden kann. Dadurch lässt sich später die Schraube leicht heraus und wieder hereindrehen. Nach Entfernen des Distanzrings und Anbringen eines Kontaktringes kann die Schraube bei der oben angegebenen Dimensionierung des Distanzrings auch nicht beim vollständigen Festziehen gegen das Werkstück stoßen, da das Ende der Schraube maximal um einen Überstand in den Hohlraum ragen kann, der der Dicke des Distanzrings minus der Dicke des Kontaktringes entspricht. Die angegebene Abstimmung der Maße aller Teile aufeinander ist daher besonders vorteilhaft für die vorliegende Erfindung.In a particularly advantageous development of the invention, the spacer ring has a thickness that is approximately equal to the depth of the cavity in the welded state. This is particularly important in connection with a further preferred embodiment of the invention, according to which the end of the screw, when the spacer ring is tensioned, is approximately flush with the end of the internal thread of the weld nut. The latter means that neither the external thread of the screw nor the internal thread of the weld nut can be contaminated by metal splashes during welding. This allows the screw to be easily removed and screwed in later. After removing the spacer ring and attaching a contact ring, the screw with the dimensioning of the spacer ring mentioned above cannot hit the workpiece even when fully tightened, since the end of the screw can protrude into the cavity by a maximum of an excess that is the thickness of the spacer ring minus Corresponds to the thickness of the contact ring. The specified matching of the dimensions of all parts to one another is therefore particularly advantageous for the present invention.
Schließlich ist es auch günstig, den Außendurchmesser des ringförmigen Fortsat- zes größer als den Außendurchmesser der sonstigen Befestigung zu machen. Dies erlaubt eine Anpassung an unterschiedliche Werkstückdicken und gewünschte Drehmomente ohne Veränderung der Maße der Kontaktflächen.Finally, it is also advantageous to make the outer diameter of the annular extension larger than the outer diameter of the other fastening. This allows adaptation to different workpiece thicknesses and desired torques without changing the dimensions of the contact surfaces.
Weitere spezielle Ausgestaltungen und Vorteile der Erfindung werden in der fol- genden Zeichnung beschrieben. Ohne den Inhalt der Erfindung einzuschränken, zeigt die Zeichnung eine von vielen möglichen Realisierungsformen. Es zeigenFurther special configurations and advantages of the invention are described in the following drawing. Without restricting the content of the invention, the drawing shows one of many possible forms of implementation. Show it
Fig. 1 eine erfindungsgemäße anschweissbare Befestigung im Längsschnitt, undFig. 1 is a weldable attachment according to the invention in longitudinal section, and
Fig. 2. die aufgeweißte Befestigung nach Fig. 1, bei der der Distanzring entfernt und eine elektrische Leitung befestigt ist.Fig. 2. the welded attachment according to Fig. 1, in which the spacer ring is removed and an electrical line is attached.
Fig. 1 zeigt eine erfindungsgemäße anschweissbare Befestigung für einen elektrischen Kontakt. Sie umfasst eine Schweißmutter 1, die an ihrer Oberseite eine elektrische Kontaktfläche 9 und an ihrer Unterseite einen ringförmigen axialen Fortsatz 6 aufweist, der einen Hohlraum 4 einer vorgebbaren Tiefe T umgibt, und mit einer in die Schweißmutter 1 eingeschraubten Schraube 3, die ebenfalls eine elektrische Kontaktfläche 9 aufweist, wobei zwischen den Kontaktflächen 9 ein Distanzring 2 eingeklemmt ist. Der Distanzring 2 ist so geformt, dass er die Kon- taktflächen 9 im wesentlichen abdeckt und zwischen ihnen sicher eingeklemmt ist. Durch die Klemmung des Distanzrings 2 werden die Schraube 3 und die Schweißmutter 1 gegeneinander verspannt, so dass ein Lösen der Schraube 3 von der Schweiß mutter 1 selbst unter starker mechanischer Belastung (z.B. durch Vibrationen beim Transport oder der Handhabung) aufgrund der vergleichsweise großen Haftreibung verhindert wird. Der Distanzring 2 dichtet die Schraube 3 gegenüber der Schweißmutter 1 ab und verhindert ein Eindringen von Verunreinigungen bzw. Farbe zu den Kontaktflächen und in das Innere der vormontierten Kombination. Das Ende 5 der Schraube 3 mit Außengewinde 13 schließt bündig mit dem Ende des Innengewindes 12 der Schweißmutter 1 ab. Beim Anschweißen an ein Werkstück 7, welches auch aus einem dünnen Blech von beispielsweise weniger als 0,6 mm Dicke bestehen kann, können sich somit keine Metallspritzer an den Gewindegängen ablagern und später die Demontage oder Montage behindern. Die Dicke D des Distanzrings 2 ist vorteilhafterweise ungefähr genauso groß wie die Tiefe T des Hohlraums 4. Dadurch kann die Schraube später beim Austausch des Distanzrings 2 gegen einen elektrischen Kontaktring nicht gegen das Werkstück 7 stoßen.Fig. 1 shows a weldable attachment according to the invention for an electrical contact. It comprises a weld nut 1, which has an electrical contact surface 9 on its upper side and an annular axial extension 6 on its underside, which surrounds a cavity 4 of a predeterminable depth T, and with a screw 3 screwed into the weld nut 1, which is also an electrical one Has contact surface 9, wherein a spacer ring 2 is clamped between the contact surfaces 9. The spacer ring 2 is shaped such that it essentially covers the contact surfaces 9 and is securely clamped between them. By clamping the spacer ring 2, the screw 3 and the welding nut 1 are braced against one another, so that loosening of the screw 3 from the welding nut 1 is prevented even under heavy mechanical stress (for example due to vibrations during transport or handling) due to the comparatively high static friction becomes. The spacer ring 2 seals the screw 3 against the weld nut 1 and prevents the ingress of contaminants or paint to the contact surfaces and into the interior of the preassembled combination. The end 5 of the screw 3 with an external thread 13 is flush with the end of the internal thread 12 of the weld nut 1. When welding onto a workpiece 7, which can also consist of a thin sheet of less than 0.6 mm thickness, for example, no metal splashes can occur deposit on the threads and later hinder disassembly or assembly. The thickness D of the spacer ring 2 is advantageously approximately the same as the depth T of the cavity 4. As a result, the screw cannot later strike the workpiece 7 when the spacer ring 2 is replaced by an electrical contact ring.
Fig. 2 zeigt die fertig montierte erfindungsgemäße Befestigung nach Fig. 1, bei der eine elektrische Leitung 10 mit einem Kontaktring 8 statt des Distanzrings 2 zwischen den Kontaktflächen 9 von Schraube 3 und Schweißmutter 1 einge- klemmt ist. Über die ringförmige Schweißverbindung 11 können relativ hohe Ströme geleitet und hohe Drehmomente aufgenommen werden. Die eingeschraubte Schraube 3 erreicht mit ihrem Ende 5 maximal einen Überstand d in den Hohlraum 4 hinein, der der Dicke D des früheren Distanzrings 2 minus der Dicke des Kontaktringes 8 entspricht und kann daher das Werkstück 7 nicht be- rühren und dadurch die Schweißverbindung 11 nicht beschädigen, wenn der Distanzring 2 vorher etwa eine Dicke D wie die Tiefe T des Hohlraumes 4 hatte.FIG. 2 shows the completely assembled fastening according to the invention according to FIG. 1, in which an electrical line 10 with a contact ring 8 is clamped in place of the spacer ring 2 between the contact surfaces 9 of screw 3 and weld nut 1. Relatively high currents can be conducted and high torques can be absorbed via the annular welded connection 11. The screwed-in screw 3 at its end 5 reaches at most a protrusion d into the cavity 4 which corresponds to the thickness D of the former spacer ring 2 minus the thickness of the contact ring 8 and can therefore not touch the workpiece 7 and therefore not the weld connection 11 damage if the spacer ring 2 previously had a thickness D like the depth T of the cavity 4.
Die Erfindung eignet sich besonders für die Anwendung in einer Serienproduktion, bei der mit automatischen Werkzeugen gearbeitet wird. Die vorgefertigte Einheit aus Schweißmutter, Distanzring und Schraube lässt sich wie andere Schweißteile handhaben und anschweißen und eignet sich für das Anschweißen an dünne Bleche, für Kontakte mit geringer Bauhöhe und hohe Belastungen. The invention is particularly suitable for use in series production in which automatic tools are used. The prefabricated unit consisting of weld nut, spacer ring and screw can be handled and welded like other welded parts and is suitable for welding to thin sheets, for contacts with a low overall height and high loads.
BezugszeichenlisteReference list
1 Schweißmutter1 welding nut
2 Distanzring2 spacer ring
3 Schraube3 screw
4 Hohlraum4 cavity
5 Ende5 end
6 ringförmiger axialer Fortsatz6 ring-shaped axial extension
7 Werkstück7 workpiece
8 Kontaktring8 contact ring
9 Elektrische Kontaktflächen9 Electrical contact surfaces
10 Elektrische Leitung10 Electrical line
11 S chweiß Verbindung11 Welded connection
12 Innengewinde der Schweißmutter12 internal thread of the welding nut
13 Außengewinde der Schraube13 external thread of the screw
D Dicke des Distanzrings d Überstand der SchraubeD thickness of the spacer ring d protrusion of the screw
T Tiefe des Hohlraumes T depth of the cavity

Claims

Patentansprüche claims
1. Anschweissbare Befestigung für einen elektrischen Kontakt mit einer Schweißmutter (1), die an ihrer Oberseite eine elektrische Kontaktfläche (9) und an ihrer Unterseite einen ringförmigen axialen Fortsatz (6) aufweist, der einen Hohlraum (4) einer vorgebbaren Tiefe (T) umgibt, und mit einer in die Schweißmutter (1) eingeschraubten Schraube (3), die ebenfalls eine elektrische Kontaktfläche (9) aufweist, wobei zwischen den Kontaktflächen (9) ein Distanzring (2) verspannt ist.1. Weldable fastening for an electrical contact with a welding nut (1), which has an electrical contact surface (9) on its upper side and an annular axial extension (6) on its underside, which has a cavity (4) of a predefinable depth (T) surrounds, and with a screw (3) screwed into the weld nut (1), which also has an electrical contact surface (9), a spacer ring (2) being clamped between the contact surfaces (9).
2. Befestigung nach Anspruch 1, dadurch gekennzeichnet, dass der elektrische Kontakt ein Masseanschluß, insbesondere für die Verwendung in einem Kraftfahrzeug, ist.2. Fastening according to claim 1, characterized in that the electrical contact is a ground connection, in particular for use in a motor vehicle.
3. Befestigung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der3. Attachment according to claim 1 or 2, characterized in that the
Distanzring (2) aus elastischem Material, insbesondere aus Polyäthylen, besteht.Spacer ring (2) made of elastic material, in particular polyethylene.
4. Befestigung nach einem der vorherigen Ansprüche, dadurch gekennzeich- net, dass der Distanzring (2) als Dichtung zum Abdichten der Kontaktflächen (9) gegen Schmutz oder Farbe ausgebildet ist.4. Fastening according to one of the preceding claims, characterized in that the spacer ring (2) is designed as a seal for sealing the contact surfaces (9) against dirt or paint.
5. Befestigung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Distanzring (2) eine vorgebbare Dicke (D) aufweist, die etwa gleich der Tiefe (T) des Hohlraums (4) im geschweißten Zustand ist. 5. Fastening according to one of the preceding claims, characterized in that the spacer ring (2) has a predeterminable thickness (D) which is approximately equal to the depth (T) of the cavity (4) in the welded state.
6. Befestigung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schweißmutter (1) ein Innengewinde (12) und die Schraube (3) ein Außengewinde (13) aufweist, wobei die Länge des Außengewindes (13) so bemessen ist, dass das Ende (5) der Schraube (3) bei verspanntem Distanzring (2) etwa bündig mit dem Ende des Innengewindes (12) der Schweißmutter (1) abschließt.6. Fastening according to one of the preceding claims, characterized in that the welding nut (1) has an internal thread (12) and the screw (3) has an external thread (13), the length of the external thread (13) being dimensioned such that the End (5) of the screw (3) with the tensioned spacer ring (2) approximately flush with the end of the internal thread (12) of the weld nut (1).
7. Befestigung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Außendurchmesser des ringförmigen Fortsatzes (6) größer als der Außendurchmesser der Befestigung in den übrigen Bereichen ist. 7. Fastening according to one of the preceding claims, characterized in that the outer diameter of the annular extension (6) is larger than the outer diameter of the fastening in the other areas.
EP02708232A 2001-02-16 2002-02-12 Fixing for an electrical contact Withdrawn EP1360744A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10107231 2001-02-16
DE10107231A DE10107231A1 (en) 2001-02-16 2001-02-16 Attachment for an electrical contact
PCT/DE2002/000490 WO2002067381A1 (en) 2001-02-16 2002-02-12 Fixing for an electrical contact

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EP1360744A1 true EP1360744A1 (en) 2003-11-12

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EP (1) EP1360744A1 (en)
JP (1) JP4205950B2 (en)
DE (1) DE10107231A1 (en)
WO (1) WO2002067381A1 (en)

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Also Published As

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US20040149481A1 (en) 2004-08-05
WO2002067381A1 (en) 2002-08-29
JP4205950B2 (en) 2009-01-07
DE10107231A1 (en) 2002-08-22
JP2004525487A (en) 2004-08-19
US7083479B2 (en) 2006-08-01

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