EP0573690A1 - Contact à pression - Google Patents

Contact à pression Download PDF

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Publication number
EP0573690A1
EP0573690A1 EP92109792A EP92109792A EP0573690A1 EP 0573690 A1 EP0573690 A1 EP 0573690A1 EP 92109792 A EP92109792 A EP 92109792A EP 92109792 A EP92109792 A EP 92109792A EP 0573690 A1 EP0573690 A1 EP 0573690A1
Authority
EP
European Patent Office
Prior art keywords
base body
conductor
pressure contact
contact piece
contact
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Withdrawn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
EP92109792A
Other languages
German (de)
English (en)
Inventor
Antal Antunovits
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.)
General Electric Switzerland GmbH
Original Assignee
GEC Alsthom T&D AG
Sprecher Energie 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 GEC Alsthom T&D AG, Sprecher Energie AG filed Critical GEC Alsthom T&D AG
Priority to EP92109792A priority Critical patent/EP0573690A1/fr
Publication of EP0573690A1 publication Critical patent/EP0573690A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs

Definitions

  • the present invention relates to a pressure contact according to the preamble of claim 1.
  • Pressure contacts of this type are used primarily for the electrical connection of two conductors, which can have large position tolerances against each other.
  • a pressure contact is known from DE-A-39 38 706, the spring-loaded contact piece of which is designed as a hollow cylinder with longitudinal slots on its rear end region facing a base body. The remaining segments between these slots form contact fingers which rest against the outside on the inside of the hollow cylindrical base body with their own spring.
  • the production of this pressure contact is extremely complex and there is also the risk that at high currents, even if they only occur briefly, the contact fingers are attracted to one another and therefore stand out from the base body. This can lead to the formation of an arc and thus to welding between the base body and the spring-loaded contact piece, so that the pressure contact is blocked and its spring property is eliminated.
  • the base body and the contact piece can be produced solely by turning and assembled with little effort.
  • the helix lies with each of its large number of turns on the contact piece and on the base body, which leads to small current loads on the half-turns and the contacts.
  • the helix is elastic in the radial direction, but has a high spring constant, so that large contact pressures and great stability against the forces caused by the current are achieved.
  • the sections of the helix with which it rests on the base body also run, for example in the direction of movement of the contact piece, so that low friction can be achieved. At the same time, the helix ensures that the contact piece is centered in the base body.
  • FIG. 1 shows part of a metal-encapsulated, pressurized gas-insulated switchgear in which first conductors 12 are electrically connected to second conductors 14 via resilient pressure contacts 10.
  • the pressure contacts 10 each have an essentially cylindrical base body 16 which is fastened to the relevant first conductor 12 by means of a screw connection 18.
  • the end hood 24 is seated on the high-voltage connection conductor 26 of a voltage converter 28.
  • the voltage converters 28, each assigned to a phase, are fastened to a cover 30 of the metal encapsulation 32.
  • This cover 30 is fastened in a known manner via screw connections to a tubular encapsulation part 34 which envelops the voltage converter 28 and connect to the further encapsulation parts not shown on the side facing away from the cover 30.
  • the lid 30 is substantially in the direction of the axis 34 ' rotationally symmetrical encapsulation part 34 can be lifted off this, or can be placed on it during assembly.
  • the pressure contacts 10 each take up the tolerances occurring in the axial direction between the fixedly arranged first conductors 12 and the second conductors 14. Tolerances in the radial direction are absorbed by the end caps 24.
  • the first conductors 12 are firmly supported in a generally known manner via insulating cones 36 with respect to the encapsulation 32.
  • insulating cones 36 On the side facing the voltage transformers 28 with respect to the insulating cones 36, they each have a shield-like end body 38 which carries the pressure contact 10 in question directly or indirectly via a cantilever-like connecting conductor 40.
  • the rotationally symmetrical contact piece 22 has, in its area engaging in the hollow cylindrical base body 16, a circumferential bead 42 in which a circumferential groove 44 which is open radially to the outside and is approximately rectangular in cross section is recessed.
  • a circumferential groove 44 Arranged in the circumferential groove 44 is a helical spring-like helix 46 made of electrically conductive, resilient material, which rests on the coaxial inner lateral surface 48 of the base body 16.
  • the circumferential groove 44 is shaped with respect to the circumferential surface 48 such that the helix 46 is elastically compressed in the radial direction with respect to the axis 20 and thus rests under spring force both on the circumferential surface 48 and on the bottom 50 of the circumferential groove 44.
  • the two axial end walls 52 of the circumferential groove 44 are so far apart spaced apart that in the assembled state, ie when the contact piece 22 with the helix 46 is arranged in the base body 16, the helix 46 compressed in the radial direction also bears against the end walls 52 in the axial direction. This increases the force with which the helix 46 rests on the lateral surface 48 and on the bottom 50, and in particular a lifting of the helix 46 from the lateral surface 48 and / or from the bottom 50, even at very high currents, is avoided. If the helix 46 itself has a sufficiently high rigidity, there is of course no need to support the end walls 52.
  • a circumferential retaining groove 54 is open on the base body 16, into which a snap ring 56 is inserted, which cooperates as a stop with the peripheral bead 42 of the contact piece 20 in order to prevent it from doing so by the force a coil spring 58 to be displaced out of the base body 16.
  • the one-piece base body 16 On the side facing the first conductor 12, the one-piece base body 16 has a base part 62 on which the helical spring 58 is supported with its end on this side.
  • the bottom part 62 now has a contact surface 64 with respect to its end face projecting in the direction of the axis 20 threaded pin 66 with which the base body 16 is screwed to the connecting conductor 40 of the first conductor 12.
  • the threaded pin 66 On the inside facing the base body 16, the threaded pin 66 has a recess 68 into which the coil spring 58 engages. Therefore, the diameter of the threaded pin 66 is larger than the diameter of the helical spring 58.
  • This embodiment achieves a low overall height, measured in the axial direction from the contact surface 64 to the free end of the contact piece 22 on the end face.
  • the bottom part 62 is flat, which means that in order to achieve the same spring properties of the pressure contact 10 with the same coil spring 58 as for the pressure contact 10 according to FIG. 3, the overall height corresponding to the depth of the recess 68 is greater.
  • the bottom part 62 is penetrated through a coaxial passage 70 by a screw 72 which engages in the first conductor 12 and pulls the base body 16 with its contact surface 64 against the first conductor 12.
  • the outside diameter 74 of the head 72 'of the screw 72 is smaller than the inside width 58' of the coil spring 58.
  • the contact piece 22 also has an axial passage 76, the diameter 76 'of which is now smaller than the outside diameter 74 of the screw head 72', however is larger than the diameter of a tool 78 for tightening the screw 72. This enables the finished assembly of the pressure contact 10 including the screw 72 loosely arranged therein. The tool 78 can then be used to tighten the screw 72 and thus the pressure contact 10 are attached to the first conductor 12.
  • the distance between the base part 62 and the contact piece 22 in the axial direction is preferably smaller than the length of the screw 72. This prevents the screw from disengaging from the passage 70.
  • An internal polygon is preferably formed on the screw head 72 ', so that large torques can be applied with the corresponding tool 78, which has small dimensions in diameter.
  • a threaded pin 66 ' also protrudes from the bottom part 62 with respect to the contact surface 64. 3, since it has no recess 68 and the helical spring 58 is supported on the base part 62, which is flat against the interior of the base body 16. The overall height is thus the same as that of the embodiment shown in FIG. 4. However, an axial passage 76 in the contact piece 22 is not necessary.

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  • Multi-Conductor Connections (AREA)
EP92109792A 1992-06-11 1992-06-11 Contact à pression Withdrawn EP0573690A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92109792A EP0573690A1 (fr) 1992-06-11 1992-06-11 Contact à pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92109792A EP0573690A1 (fr) 1992-06-11 1992-06-11 Contact à pression

Publications (1)

Publication Number Publication Date
EP0573690A1 true EP0573690A1 (fr) 1993-12-15

Family

ID=8209700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109792A Withdrawn EP0573690A1 (fr) 1992-06-11 1992-06-11 Contact à pression

Country Status (1)

Country Link
EP (1) EP0573690A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716474A1 (fr) 1994-12-05 1996-06-12 Multi-Contact Ag Elément de contact pour relier deux pièces de contact
EP0718918A1 (fr) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connecteur avec contact à ressort et des moyens de court-circuitage
EP0718919A1 (fr) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connecteur avec contact à ressort et des moyens de court-circuitage
DE19634434A1 (de) * 1995-08-29 1997-03-06 Yazaki Corp Steckverbindung
EP0989291A2 (fr) * 1998-09-24 2000-03-29 Mannesmann VDO Aktiengesellschaft Dispositif pour réaliser le contact avec une platine
GB2398436A (en) * 2003-02-13 2004-08-18 Ito Seisakusho Press fitting type spring connector
DE102004040118A1 (de) * 2004-08-18 2006-03-09 Ims Connector Systems Gmbh Kontakt mit einem Kontaktstift, einer Führung und einer Kontakteinrichtung zwischen diesen sowie Kontaktstift
WO2006025510A1 (fr) * 2004-08-30 2006-03-09 Yokowo Co., Ltd. Connecteur à ressort

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1542102A (en) * 1975-01-30 1979-03-14 Square D Co Electrical connecting assembly
EP0314229A1 (fr) * 1987-10-26 1989-05-03 AT&T NETWORK SYSTEMS INTERNATIONAL B.V. Connecteur coaxial
US4904213A (en) * 1989-04-06 1990-02-27 Motorola, Inc. Low impedance electric connector
DE3938706C1 (fr) * 1989-11-17 1990-10-04 Fabeg Gmbh, 7518 Bretten, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1542102A (en) * 1975-01-30 1979-03-14 Square D Co Electrical connecting assembly
EP0314229A1 (fr) * 1987-10-26 1989-05-03 AT&T NETWORK SYSTEMS INTERNATIONAL B.V. Connecteur coaxial
US4904213A (en) * 1989-04-06 1990-02-27 Motorola, Inc. Low impedance electric connector
DE3938706C1 (fr) * 1989-11-17 1990-10-04 Fabeg Gmbh, 7518 Bretten, De

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716474A1 (fr) 1994-12-05 1996-06-12 Multi-Contact Ag Elément de contact pour relier deux pièces de contact
EP0718918A1 (fr) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connecteur avec contact à ressort et des moyens de court-circuitage
EP0718919A1 (fr) * 1994-12-20 1996-06-26 Connector Systems Technology N.V. Connecteur avec contact à ressort et des moyens de court-circuitage
DE19634434A1 (de) * 1995-08-29 1997-03-06 Yazaki Corp Steckverbindung
DE19634434C2 (de) * 1995-08-29 2002-01-24 Yazaki Corp Steckverbindung mit Druckkontakt und festem Gegenkontakt
EP0989291A3 (fr) * 1998-09-24 2000-12-20 Mannesmann VDO Aktiengesellschaft Dispositif pour réaliser le contact avec une platine
DE19843770A1 (de) * 1998-09-24 2000-03-30 Mannesmann Vdo Ag Einrichtung zur Kontaktierung einer Platine
US6227871B1 (en) 1998-09-24 2001-05-08 Mannesmann Vdo Ag Device for contact-connecting a circuit board
EP0989291A2 (fr) * 1998-09-24 2000-03-29 Mannesmann VDO Aktiengesellschaft Dispositif pour réaliser le contact avec une platine
GB2398436A (en) * 2003-02-13 2004-08-18 Ito Seisakusho Press fitting type spring connector
GB2398436B (en) * 2003-02-13 2005-11-16 Ito Seisakusho Press fitting type spring connector
DE102004040118A1 (de) * 2004-08-18 2006-03-09 Ims Connector Systems Gmbh Kontakt mit einem Kontaktstift, einer Führung und einer Kontakteinrichtung zwischen diesen sowie Kontaktstift
WO2006025510A1 (fr) * 2004-08-30 2006-03-09 Yokowo Co., Ltd. Connecteur à ressort

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