EP0435408B1 - Resilient pressure contacts - Google Patents

Resilient pressure contacts Download PDF

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Publication number
EP0435408B1
EP0435408B1 EP90250246A EP90250246A EP0435408B1 EP 0435408 B1 EP0435408 B1 EP 0435408B1 EP 90250246 A EP90250246 A EP 90250246A EP 90250246 A EP90250246 A EP 90250246A EP 0435408 B1 EP0435408 B1 EP 0435408B1
Authority
EP
European Patent Office
Prior art keywords
contact
hollow cylinder
head
tongues
guide sleeve
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.)
Expired - Lifetime
Application number
EP90250246A
Other languages
German (de)
French (fr)
Other versions
EP0435408A2 (en
EP0435408A3 (en
Inventor
Klaus Kaestner
Georg Treinies
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.)
FABEG GmbH
Original Assignee
FABEG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FABEG GmbH filed Critical FABEG GmbH
Publication of EP0435408A2 publication Critical patent/EP0435408A2/en
Publication of EP0435408A3 publication Critical patent/EP0435408A3/en
Application granted granted Critical
Publication of EP0435408B1 publication Critical patent/EP0435408B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 invention relates to a resilient pressure contact for the front system and for current transmission to a fixed contact with a movable metallic contact head, as further defined in the preamble of claim 1.
  • the contact head moves axially against a spring force within its guide sleeve when it rests on a fixed contact within its guide sleeve.
  • the current transfer between the contact connection and the movable contact head takes place through copper strands within the guide sleeve. A not inconsiderable manual manufacturing effort is required for the production. If the number of contacts is high, the inner copper strands often break.
  • Such pressure contacts generally have no switching function. They are brought to the system without power or separated.
  • the object of the invention is to improve the service life of the resilient pressure contacts in the direction of increasing the number of possible contact strokes, to increase the reliability by avoiding or reducing strand breaks, to reduce the overall manual production effort and at the same time to increase the current carrying capacity.
  • a switch has already become known in which a contacting plug is inserted into a resilient mating contact (US Pat. No. 3,205,332).
  • the switch In counter contact, the switch has a movable erosion contact head, which is hollow-cylindrical on the end facing away from the contact pieces and is designed to accommodate a compression spring.
  • a high-resistance current transfer between the plug parts is first established via the above erosion contact head by pressure contact.
  • the erosion contact head which is equipped with resilient guide surfaces, is moved within a slotted guide sleeve which, in the end position as a tulip contact piece, comprises the actual plug contact of the plug in a low-resistance manner.
  • Such an erosion contact head of a plug is not usable for resilient pressure contacts in the area of railway applications.
  • a metal contact head 2 made of solid material and with contact pieces 1 is mounted in a guide sleeve 3 so that it cannot rotate, but is displaceable.
  • a compression spring 4 holds the contact head in the position shown.
  • a force P presses in the direction of the arrow and the contact head 2 is pressed - here to the right - by pressing the compression spring 4.
  • the electrical connection is made via a screw bolt 5, the current transfer from the fixed connecting plate 7 to the movable contact head 2 via various copper strands or bands 6 is effected. The latter are introduced with a twist and soldered at the ends.
  • Fig. 2 now shows a new contact head 2a.
  • the fit dimensions are the same and therefore interchangeable.
  • the copper strands 6 have now been omitted.
  • the new contact head 2a On its side facing away from the contact pieces 1, the new contact head 2a is partially designed as a hollow cylinder 8 and is provided with slots 9 which are radial to the longitudinal axis.
  • the remaining wall sectors form contact tongues 10 which, according to FIG. 3, abut on the inside of the guide sleeve 3 and thus serve to transfer current from the connecting bolt 5 via the guide sleeve 3 to the contact head.
  • the profile of the Kostaktzonne 10 is formed by an undercut with a contact-making area 12 of the largest outside diameter on the very outside on the side facing away from the contact pieces 1 and inwardly adjoining areas with reduced outside diameters, the smallest outside diameter located at the end of the radial slots 9 being the tongue fixed points 13 for the Tongue movement determined.
  • the compression spring 4 of the resilient pressure contact engages centrally in the hollow cylinder 8 of the coupling head 2a, is supported on the base 14 and is fixed there. Snap rings can be inserted in one or more circumferential inner ring grooves 15 to increase the contact pressure. The necessary high electrical conductivity as well as resistance to abrasion are ensured by a suitable choice of materials.
  • the new pressure contacts remain unchanged from the previous design. The new contact head is full with the previous ones - i.e. mechanically and electrically - compatible.

Landscapes

  • Contacts (AREA)
  • Surface Heating Bodies (AREA)
  • Springs (AREA)
  • Resistance Heating (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

For a resilient pressure contact, in which a contact head is moved axially against the force of a compression spring on resting against a fixed contact inside a guide sleeve, the object exists of improving the life of the resilient pressure contacts, increasing the reliability by reducing the braided conductor fractures, increasing the current capacity and reducing the overall manual production costs. This is achieved in that a part of the contact head (2a) is constructed on the side facing away from the contact pieces (1) as a hollow cylinder (8) having a wall which has multiple slots (9) radially with respect to the longitudinal axis, the remaining wall sectors being used as current-carrying resilient contact tongues (10) opposite the guide sleeve (3). Braided conductors are no longer used. <IMAGE>

Description

Die Erfindung bezieht sich auf einen federnden Druckkontakt zur stirnseitigen Anlage an und zur Stromübertragung auf einen Festkontakt mit einem beweglichen metallischen Kontaktkopf, wie er im übrigen im Oberbegriff des Anspruches 1 näher definiert ist.The invention relates to a resilient pressure contact for the front system and for current transmission to a fixed contact with a movable metallic contact head, as further defined in the preamble of claim 1.

Bei den bekannten gebräuchlichen Druckkontakten, wie sie insbesondere bei elektrischen Bahn- und Kabelkupplungen Verwendung finden, bewegt sich innerhalb des federnden Druckkontaktes der Kontaktkopf bei Anlage an einen Festkontakt innerhalb seiner Führungshülse axial gegen eine Federkraft. Der Stromübergang zwischen Kontaktanschluß und beweglichem Kontaktkopf erfolgt durch Kupferlitzen innerhalb der Führungshülse. Für die Herstellung ist ein nicht unbeträchtlicher manueller Fertigungsaufwand erforderlich. Bei hoher Kontaktierungshäufigkeit kommt es häufig zu Brüchen der inneren Kupferlitzen.In the known conventional pressure contacts, such as those used in particular in electrical railway and cable couplings, the contact head moves axially against a spring force within its guide sleeve when it rests on a fixed contact within its guide sleeve. The current transfer between the contact connection and the movable contact head takes place through copper strands within the guide sleeve. A not inconsiderable manual manufacturing effort is required for the production. If the number of contacts is high, the inner copper strands often break.

Solchen Druckkontakten kommt allgemein keine Schaltfunktion zu. Sie werden stromlos zur Anlage gebracht oder getrennt.Such pressure contacts generally have no switching function. They are brought to the system without power or separated.

Aufgabe der Erfindung ist es, die Standzeit der federnden Druckkontakte in Richtung einer Vergrößerung der Anzahl möglicher Kontakthübe zu verbessern, die Zuverlässigkeit durch Vermeidung oder Verminderung von Litzenbrüchen zu steigern, den manuellen Fertigungsaufwand insgesamt zu reduzieren und gleichzeitig die Strombelastbarkeit zu erhöhen.The object of the invention is to improve the service life of the resilient pressure contacts in the direction of increasing the number of possible contact strokes, to increase the reliability by avoiding or reducing strand breaks, to reduce the overall manual production effort and at the same time to increase the current carrying capacity.

Diese komplexe Aufgabe wird gemäß den kennzeichnenden Merkmalen des Anspruches 1 auf einfache Weise gelöst, Vorteilhafte Ausgestaltungen sind den Unteransprüchen entnehmbar.
Es ist bereits ein Schalter bekanntgeworden, bei dem ein kontaktgebender Stecker in einen federnden Gegenkontakt gesteckt wird (US-A-3 205 332). Der Schalter weist im Gegenkontakt einen beweglichen Abbrand-Kontaktkopf auf, der auf dem den Kontaktstücken abgewandten Ende hohlzylindrisch und für die Aufnahme einer Druckfeder ausgebildet ist. Beim Einstecken des Steckers wird zunächst über den vorstehenden Abbrand-Kontaktkopf durch Druckkontakt ein hochohmiger Stromübergang zwischen den Steckerteilen hergestellt. Dabei wird der mit federnden Führungsflächen ausgestattete Abbrand-Kontaktkopf innerhalb einer geschlitzten Führungshülse bewegt, die in der Endlage als Tulpenkontaktstück den eigentlichen Steckkontakt des Steckers niederohmig umfaßt. Ein solcher Abbrand-Kontaktkopf eines Steckers ist für federnde Druckkontakte im Bahnanwendungsbereich nicht brauchbar.This complex problem is solved in a simple manner according to the characterizing features of claim 1. Advantageous refinements can be found in the subclaims.
A switch has already become known in which a contacting plug is inserted into a resilient mating contact (US Pat. No. 3,205,332). In counter contact, the switch has a movable erosion contact head, which is hollow-cylindrical on the end facing away from the contact pieces and is designed to accommodate a compression spring. When the plug is inserted, a high-resistance current transfer between the plug parts is first established via the above erosion contact head by pressure contact. In this case, the erosion contact head, which is equipped with resilient guide surfaces, is moved within a slotted guide sleeve which, in the end position as a tulip contact piece, comprises the actual plug contact of the plug in a low-resistance manner. Such an erosion contact head of a plug is not usable for resilient pressure contacts in the area of railway applications.

Weiter bekannt ist ein als Hilfsschalter fungierender federnder Druckkontakt eines Hauptschalters (DE-PS 563 635). Dort wird ein federnd abgestützter ungeschlitzter Schaltkopf innerhalb einer ebenfalls ungeschlitzten Führungshülse bewegt. Der Stromübergang erfolgt - nur für Niedrigströme ausreichend - über die gegenseitigen Führungsflächen unter Wirkung eines Verkantens und unter Einbeziehung der Abstützfeder. Eine sichere Hochstromführung bei langer Lebensdauer ist damit nicht erreichbar.Also known is a resilient pressure contact acting as an auxiliary switch of a main switch (DE-PS 563 635). There, a resiliently supported unslit switch head is moved within an unslit guide sleeve. The current transfer takes place - only sufficient for low currents - via the mutual guide surfaces under the effect of tilting and with the inclusion of the support spring. Safe high-current control with a long service life cannot be achieved.

Anhand eines schematischen Ausführungsbeispieles in der Zeichnung wird die Erfindung im nachstehenden näher erläutert.Using a schematic embodiment in the drawing, the invention is explained in more detail below.

Es zeigen:

  • Fig. 1 einen herkömmlichen Druckkontakt im Schnitt
  • Fig. 2 einen neuen Kontaktopf
  • Fig. 3 einen neuen federnden Druckkontakt mit einem Kontaktkopf gemäß Fig. 2.
Show it:
  • Fig. 1 shows a conventional pressure contact in section
  • Fig. 2 shows a new contact head
  • 3 shows a new resilient pressure contact with a contact head according to FIG. 2.

Aus Fig. 1 ist der grundsätzliche Aufbau eines federnden Druckkontaktes erkennbar. Danach ist ein mit Kontaktstücken 1 besetzter metallischer Kontaktkopf 2 aus Vollmaterial in einer Führungshülse 3 verdrehsicher, aber verschiebbar gelagert. Eine Druckfeder 4 hält den Kontaktkopf in der dargestellten Lage. Bei einem Kupplungsvorgang drückt eine Kraft P in Pfeilrichtung und der Kontaktkopf 2 wird - hier nach rechts - gedrückt unter Pressung der Druckfeder 4. Der elektrische Anschluß erfolgt über einen Schraubbolzen 5, wobei der Stromübergang vom festen Anschlußteller 7 auf den beweglichen Kontaktkopf 2 über diverse Kupferlitzen oder -bänder 6 bewirkt wird. Letzter sind mit einem Drall eingebracht und endseitig verlötet.From Fig. 1, the basic structure of a resilient pressure contact can be seen. Thereafter, a metal contact head 2 made of solid material and with contact pieces 1 is mounted in a guide sleeve 3 so that it cannot rotate, but is displaceable. A compression spring 4 holds the contact head in the position shown. During a coupling process, a force P presses in the direction of the arrow and the contact head 2 is pressed - here to the right - by pressing the compression spring 4. The electrical connection is made via a screw bolt 5, the current transfer from the fixed connecting plate 7 to the movable contact head 2 via various copper strands or bands 6 is effected. The latter are introduced with a twist and soldered at the ends.

Fig. 2 zeigt nun einen neuen Kontaktkopf 2a. Dieser ist in seinen Passungsabmessungen gleich und damit austauschbar. Wie auch Fig. 3 entnehmbar ist, sind jetzt die Kupferlitzen 6 entfallen. Der neue Kontaktkopf 2a ist auf seiner den Kontaktstücken 1 abgewandten Seite teilweise als Hohlzylinder 8 ausgebildet und mit zur Längsachse radialen Schlitzen 9 versehen. Die verbleibenden Wandungssektoren bilden Kontaktzungen 10, die nach Fig. 3 auf der Innenseite der Führungshülse 3 schleifend anliegen und so dem Stromübergang vom Anschlußbolzen 5 über Führungshülse 3 zum Kontaktopf dienen. Das Profil der Kostaktzungen 10 ist durch Hinterschnitt gebildet mit einem kontaktgebenen Bereich 12 größten Außendurchmessers ganz außen auf der den Kontaktstücken 1 abgewandten Seite und nach innen sich anschließenden Bereichenmit reduzierten Außendurchmessern, wobei der am Ende der radialen Schlitze 9 befindliche geringste Außendurchmesser die Zungenfestpunkte 13 für die Zungenbewegung bestimmt.Fig. 2 now shows a new contact head 2a. The fit dimensions are the same and therefore interchangeable. As can also be seen in FIG. 3, the copper strands 6 have now been omitted. On its side facing away from the contact pieces 1, the new contact head 2a is partially designed as a hollow cylinder 8 and is provided with slots 9 which are radial to the longitudinal axis. The remaining wall sectors form contact tongues 10 which, according to FIG. 3, abut on the inside of the guide sleeve 3 and thus serve to transfer current from the connecting bolt 5 via the guide sleeve 3 to the contact head. The profile of the Kostaktzungen 10 is formed by an undercut with a contact-making area 12 of the largest outside diameter on the very outside on the side facing away from the contact pieces 1 and inwardly adjoining areas with reduced outside diameters, the smallest outside diameter located at the end of the radial slots 9 being the tongue fixed points 13 for the Tongue movement determined.

Die Druckfeder 4 des federnden Druckkontaktes greift zentral in den Hohlzylinder 8 des Kupplungskopfes 2a ein, stützt sich am Boden 14 ab und ist dort festgelegt. In einer oder mehreren umlaufenden inneren Ringnuten 15 können zur Kontaktdruckverstärkung Sprengringe eingelegt werden. Durch geeignete Werkstoffauswahl wird sowohl die notwendige hohe elektrische Leitfähigkeit wie auch Abriebfestigkeit sichergestellt. Die neuen Druckkontakte bleiben gegenüber der bisherigen Bauform äußerlich unverändert. Der neue Kontaktkopf ist mit den bisherigen voll - d.h. mechanisch und elektrisch - kompatibel.The compression spring 4 of the resilient pressure contact engages centrally in the hollow cylinder 8 of the coupling head 2a, is supported on the base 14 and is fixed there. Snap rings can be inserted in one or more circumferential inner ring grooves 15 to increase the contact pressure. The necessary high electrical conductivity as well as resistance to abrasion are ensured by a suitable choice of materials. The new pressure contacts remain unchanged from the previous design. The new contact head is full with the previous ones - i.e. mechanically and electrically - compatible.

Claims (4)

  1. Resilient pressure contact for the end-on bearing against and the current transmission to a fixed contact, with a movable metallic contact head which on bearing against the fixed contact is urged back axially within a guide sleeve against the force of a compression spring wherein the contact head, which is formed partially as hollow cylinder and closed at the contact end, is arranged for a reception of the compression spring, in particular for railway applications, characterised thereby that for a high current-carrying capacity the contact head (2a) is provided with multiple longitudinal slots (9) in the wall, which start out from that end of the hollow cylinder (8), which is remote from the contact members (1), and thereby form wall sectors which are formed as resilient, highly conductive contact tongues (10) and display crowned, contact-making end regions (12), which lie wipingly against the inward side of the inward side of the current-transmitting guide sleeve (3).
  2. Pressure contact according to claim 1, characterised thereby that the profile of the contact tongues (10) of the contact head (20) is formed by undercutting the outer diamter of the hollow cylinder (8), wherein inner regions of reduced outer diameters still adjoin an outer contact-making region of greatest outer diameter (12) on the outer side remote from the contact members (1) and a smallest outer diameter situated at the ends of the radial slots forms the fixed points (13) of the tongues.
  3. Pressure contact according to claim 1 or 2, characterised thereby that the spring force of the contact tongues (10) is increased by one or more spring rings in the interior of the hollow cylinder (8).
  4. Pressure contact according to claim 3, characterised thereby that the spring rings are housed at the height of the contact-making region (12) in encircling inner annular grooves of the hollow cylinder (8).
EP90250246A 1989-11-17 1990-09-26 Resilient pressure contacts Expired - Lifetime EP0435408B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938706 1989-11-17
DE3938706A DE3938706C1 (en) 1989-11-17 1989-11-17

Publications (3)

Publication Number Publication Date
EP0435408A2 EP0435408A2 (en) 1991-07-03
EP0435408A3 EP0435408A3 (en) 1992-01-02
EP0435408B1 true EP0435408B1 (en) 1996-04-10

Family

ID=6393977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250246A Expired - Lifetime EP0435408B1 (en) 1989-11-17 1990-09-26 Resilient pressure contacts

Country Status (5)

Country Link
EP (1) EP0435408B1 (en)
AT (1) ATE136682T1 (en)
DE (2) DE3938706C1 (en)
ES (1) ES2086366T3 (en)
GR (1) GR3020253T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1289072A2 (en) 2001-09-04 2003-03-05 era-contact GmbH Electrical pressure contact
DE10261733A1 (en) * 2002-12-30 2004-07-22 Ims Connector Systems Gmbh Pluggable connector with rolled-metallic cylindrical sleeve, has sleeve made from cylindrical-shaped arcuate plane material section
DE102004027902A1 (en) * 2004-06-09 2005-12-29 Ims Connector Systems Gmbh Push contact for a battery connection has a contact pin for making contact with a counter contact, a flexible tightening element, a guiding device and a contact spring
DE102004040118A1 (en) * 2004-08-18 2006-03-09 Ims Connector Systems Gmbh Small device-pressure contact, has elastic, electric conductive contact device laterally fastened onto contact pin and pressing against guide for mounting of electrical connection between guide and contact device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573690A1 (en) * 1992-06-11 1993-12-15 GEC Alsthom T&D AG Pressure contact
FR2709025B1 (en) * 1993-08-10 1995-10-20 Legrand Sa Elastic electrical contact.
JP3156957B2 (en) * 1995-08-29 2001-04-16 矢崎総業株式会社 connector
FR2768897B1 (en) * 1997-09-23 1999-11-19 Matra Marconi Space France DEVICE FOR INTERCONNECTING ELECTRONIC MODULES IN A THREE-DIMENSIONAL ASSEMBLY
JP2001143803A (en) * 1999-11-16 2001-05-25 Yazaki Corp Butting contact terminal and connector using the same
DE10158716B4 (en) * 2001-11-29 2005-08-18 Dellner Kupplungen Gmbh Contact for transmitting electricity
DE10332298B4 (en) 2003-07-16 2018-09-27 Schaltbau Gmbh Watertight pressure-contact connector, contact element for a watertight pressure-contact connector and method for producing a contact element
DE102004033864A1 (en) * 2004-07-13 2006-02-16 Era-Contact Gmbh Electrical pressure contact

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE563635C (en) * 1929-06-18 1932-11-07 Siemens Schuckertwerke Akt Ges Switching device for working with a particularly high switching frequency
GB655491A (en) * 1948-06-18 1951-07-25 Reyrolle A & Co Ltd Improvements relating to contact arrangements of electric circuit breakers
US2728062A (en) * 1952-12-04 1955-12-20 American Phenolic Corp Spring loaded butt contact with external contacting sleeve
US3205332A (en) * 1963-08-15 1965-09-07 Kinetics Corp Switch having two pairs of contacts, one pair being formed of material having higherresisttvity characteristic than the other pair

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1289072A2 (en) 2001-09-04 2003-03-05 era-contact GmbH Electrical pressure contact
US6773312B2 (en) 2001-09-04 2004-08-10 Era-Contact Gmbh Electrical pressure contact
DE10261733A1 (en) * 2002-12-30 2004-07-22 Ims Connector Systems Gmbh Pluggable connector with rolled-metallic cylindrical sleeve, has sleeve made from cylindrical-shaped arcuate plane material section
DE10261733B4 (en) * 2002-12-30 2005-07-21 Ims Connector Systems Gmbh Connector with rolled sleeve
DE102004027902A1 (en) * 2004-06-09 2005-12-29 Ims Connector Systems Gmbh Push contact for a battery connection has a contact pin for making contact with a counter contact, a flexible tightening element, a guiding device and a contact spring
DE102004027902B4 (en) * 2004-06-09 2006-06-08 Ims Connector Systems Gmbh Push contact for a battery connection has a contact pin for making contact with a counter contact, a flexible tightening element, a guiding device and a contact spring
DE102004040118A1 (en) * 2004-08-18 2006-03-09 Ims Connector Systems Gmbh Small device-pressure contact, has elastic, electric conductive contact device laterally fastened onto contact pin and pressing against guide for mounting of electrical connection between guide and contact device

Also Published As

Publication number Publication date
EP0435408A2 (en) 1991-07-03
DE59010279D1 (en) 1996-05-15
GR3020253T3 (en) 1996-09-30
EP0435408A3 (en) 1992-01-02
DE3938706C1 (en) 1990-10-04
ATE136682T1 (en) 1996-04-15
ES2086366T3 (en) 1996-07-01

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