EP1360744A1 - Fixation pour contact electrique - Google Patents

Fixation pour contact electrique

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Withdrawn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)
English (en)
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/fr
Withdrawn legal-status Critical Current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

La présente invention concerne une fixation à souder destiné à un contact électrique, comprenant : un écrou à souder (1) qui présente sur sa face supérieure une surface de contact électrique (9), et sur sa face inférieure un prolongement axial annulaire (6) qui entoure une cavité (4) ayant une profondeur (T) qui peut être prédéterminée ; et une vis (3) vissée dans l'écrou à souder (1) et présentant également une surface de contact électrique (9), un anneau de séparation (2) étant enserré entre les surfaces de contact (9). De préférence, l'anneau de séparation (2) a une épaisseur (D) qui est approximativement égale à la profondeur (T) de la cavité (4). Lorsque l'anneau de séparation (2) est enserré, la vis (3) vient approximativement à fleur de l'extrémité du filetage interne (12) de l'écrou à souder (1). Cette combinaison se caractérise en ce qu'elle a une hauteur de montage limitée, aucune projection de métal ne se dépose dans le filetage (12) lors de la soudure, les surfaces de contact (9) sont protégées lors du montage, et la liaison de soudure peut supporter des moments de rotation élevés, même lors de la soudure contre des pièces fines (7).
EP02708232A 2001-02-16 2002-02-12 Fixation pour contact electrique Withdrawn EP1360744A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10107231 2001-02-16
DE10107231A DE10107231A1 (de) 2001-02-16 2001-02-16 Befestigung für einen elektrischen Kontakt
PCT/DE2002/000490 WO2002067381A1 (fr) 2001-02-16 2002-02-12 Fixation pour contact electrique

Publications (1)

Publication Number Publication Date
EP1360744A1 true EP1360744A1 (fr) 2003-11-12

Family

ID=7674261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708232A Withdrawn EP1360744A1 (fr) 2001-02-16 2002-02-12 Fixation pour contact electrique

Country Status (5)

Country Link
US (1) US7083479B2 (fr)
EP (1) EP1360744A1 (fr)
JP (1) JP4205950B2 (fr)
DE (1) DE10107231A1 (fr)
WO (1) WO2002067381A1 (fr)

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Also Published As

Publication number Publication date
US20040149481A1 (en) 2004-08-05
US7083479B2 (en) 2006-08-01
JP4205950B2 (ja) 2009-01-07
JP2004525487A (ja) 2004-08-19
WO2002067381A1 (fr) 2002-08-29
DE10107231A1 (de) 2002-08-22

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