EP1776740B1 - Elektrischer druckkontakt - Google Patents

Elektrischer druckkontakt Download PDF

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Publication number
EP1776740B1
EP1776740B1 EP05774246A EP05774246A EP1776740B1 EP 1776740 B1 EP1776740 B1 EP 1776740B1 EP 05774246 A EP05774246 A EP 05774246A EP 05774246 A EP05774246 A EP 05774246A EP 1776740 B1 EP1776740 B1 EP 1776740B1
Authority
EP
European Patent Office
Prior art keywords
contact
bore
head
housing sleeve
facing
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
EP05774246A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1776740A1 (de
Inventor
Andreas Kainz
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.)
Era Contact GmbH
Original Assignee
Era Contact 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35134762&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1776740(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Era Contact GmbH filed Critical Era Contact GmbH
Publication of EP1776740A1 publication Critical patent/EP1776740A1/de
Application granted granted Critical
Publication of EP1776740B1 publication Critical patent/EP1776740B1/de
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
    • 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
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • 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
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/111—Resilient sockets co-operating with pins having a circular transverse section

Definitions

  • the invention relates to an electrical pressure contact, comprising a housing sleeve having a contact-facing and a contact-facing end, an axially displaceably mounted in the housing sleeve, conductive contact head, which protrudes from the contact facing end of the housing sleeve, a arranged in the housing sleeve biasing member, against the biasing force of the contact head in the housing sleeve is inserted, and arranged at the contact remote from the end of the housing sleeve, conductive connecting piece for fixing an electrical supply line.
  • Electrical pressure contacts of the type described above are used for example for power or signal transmission between mutually movable elements.
  • the provided in the pressure contact contact head provides for a resilient mechanical contact with a relative to the housing sleeve movable mating contact.
  • electrical contact via the conductive contact head electrical contact to a fixed to the connector electrical supply produced.
  • EP 1 289 072 A2 The prior art is referred to an electrical pressure contact in EP 1 289 072 A2 is described.
  • This pressure contact has an axially flexible electrical line, which is clamped with its contact-facing end in an axial direction at the contact remote end of the contact head formed axial bore and with its contact remote end in a contact-facing end of the connecting piece formed axial bore.
  • the flexible electrical line of strands or be formed by a compression spring, against the spring force of the contact head is inserted into the housing sleeve.
  • DE 39 38 706 C1 discloses an electrical pressure contact, which manages without strands.
  • Fig. 6 is shown in this pressure contact of contact remote, ie inserted into a housing sleeve 1 section 2 of a contact head 3 is formed as a hollow cylinder.
  • the wall of the hollow cylinder has a plurality of longitudinal slots 4, whereby Wandungssektoren are formed, which serve as resilient, electrically conductive contact tongues 5.
  • the contact tongues 5 abut on the inner surface of the current-transmitting housing sleeve 1, so the current can flow via the contact tongues 5 to the housing sleeve 1 and from there to a connection piece 6.
  • a contact grease between the contact tongues 5 and the inner surface of the housing sleeve 1 is introduced.
  • the contact grease serves to provide a contact resistance between the contact tongues 5 and the housing sleeve 1 which is as small as possible and constant over time.
  • the problem arises that as a result of the contact strokes, the contact grease passes from the interior of the housing sleeve 1 to the outside and therefore no longer available for contact lubrication or is contaminated by dust particles, which adhere to the contact facing the end of the contact head 3 and get into the interior of the housing sleeve 1 when inserted. Through these contaminants, the contact grease gradually loses both its contact action and its lubricating effect.
  • the protruding from the housing sleeve 1 end of the contact head 3 is cleaned.
  • the pressure contact must be disassembled, which is tedious, time consuming and costly.
  • EP 0 838 878 A The prior art is further referred to EP 0 838 878 A .
  • EP 1 385 233 A EP 1 102 359 and EP 0 435 408A .
  • the present invention seeks to provide an electrical pressure contact of the type mentioned, which is simple and over a long period of uniformly good performance both in terms of its mechanical properties and its electrical properties.
  • the electrical contact between the contact head and the connecting piece is produced in that the non-contact portion of the contact head is axially displaceable in the formed in the connecting piece facing the contact axial bore.
  • the current or signal transmission takes place directly via the contact head and the connecting piece, without the need for transmission via the housing sleeve.
  • the axial bore of the connecting piece forms a separate contact space within the housing sleeve. In this separate contact space, a contact grease can be introduced, which keeps the contact resistance between the contact head and the connector low and also ensures that the non-contact portion is friction in the axial bore of the connector displaced.
  • the contact fat can be introduced into the separate contact space, it is protected from impurities such as dust that can get into the interior of the housing sleeve as a result of the strokes. An associated with considerable installation effort replacement of the contact fat is therefore not required even with a long service life. Also can be dispensed with the use of degreasing detergents, which, as described above, affect the effectiveness of the contact fat.
  • the invention thus provides an electrical pressure contact, which is particularly well protected from environmental influences and requires virtually no maintenance.
  • a conductive contact element is seated in the bore and abrades the outer surface of the contact-facing section of the contact head axially displaceable in the bore and establishes the electrical contact between the contact head and the connecting piece.
  • a contact element is arranged in the bore formed in the connecting piece.
  • the contact facing away portion of the contact head is inserted into the contact element and contacted with this.
  • the contact facing away portion of the contact head, formed in the connector bore and the seated therein contact element form a particularly stable coaxial arrangement, which allows easy installation without much adjustment effort.
  • the contact element abradingly abuts against the outer surface of the contact-facing section of the contact head moving in it, so that secure contact is ensured.
  • the current transfer takes place with advantageously low contact resistance from the contact head via the contact element directly, i. without going through the housing sleeve, on the connector.
  • the firmly seated in the bore of the connector contact element provides on the one hand for a good mechanical guidance of the inserted in the bore contact head and on the other hand for a good electrical contact between the contact head and the connector. As a result, a constant contact resistance is ensured even after a high number of contact strokes.
  • the pressure contact has over a long service life a consistently good performance.
  • the contact element is a metallic, tubular element, in which the non-contact portion of the contact head is always accommodated at least in part and the plurality of concave inwardly curved, adjacent in the circumferential direction and longitudinally extending contact blades which are resiliently biased to the outer surface of the portion of the contact head received in the contact element.
  • the elastically acting contact blades provide both good mechanical guidance and secure contacting of the contact head.
  • the contact element has a plurality of circumferentially adjacent and extending in the longitudinal direction slots.
  • the contact blades are formed in this embodiment by the formed between these slots portions of the contact element.
  • a mounting slot is formed in the wall of the contact element, which passes through the contact element over its entire length.
  • the contact element is so compressible while reducing the width of the mounting slot, that reduces the diameter of the contact element.
  • the contact element is arranged in a press fit in the bore of the connection piece. This also simplifies the structure of the pressure contact.
  • the bore of the connector has a larger diameter portion, a smaller diameter portion and a radially inwardly between these two parts shoulder.
  • the contact element is arranged in the larger diameter part and lies with one end to the shoulder.
  • the length of the contact element is equal to the length of the larger diameter portion of the bore, while the outer diameter of the two ends of the contact element are equal to the diameter of the larger diameter portion of the bore.
  • the contact element thus fills the larger diameter portion of the bore in its entire length and is fixed over its two ends radially in this part of the bore. This also simplifies the construction of the contact head.
  • the contact-facing smaller diameter portion of the contact head is completely received in the bore when the contact head is inserted maximally into the housing sleeve, while it is received only with its contact remote end in the larger diameter portion of the bore, if the contact head maximum from the contact facing end of the housing sleeve protrudes.
  • the contact facing away portion of the contact head is more securely guided in the bore of the connector.
  • the length of the contact-facing smaller-diameter portion of the contact head preferably corresponds to the length of the bore. The axial dimension of the pressure contact can be reduced.
  • the contact element is preferably made of silvered brass. This material is characterized on the one hand by good conductivity and on the other hand mechanical resistance. This also helps to ensure good mechanical guidance and secure contact of the contact head.
  • the terminal piece has a larger diameter portion facing away from the contact via which it is attached to the inner wall of the housing sleeve, and a smaller diameter portion facing the contact
  • the contact head has a larger diameter portion facing toward the contact and the smaller diameter portion facing away from the contact
  • the biasing member a coil spring surrounding the non-contact portion of the contact head and the contact-facing portion of the fitting.
  • a coil spring forming the biasing element is arranged in the space defined in the housing sleeve about the interlocking arrangement of the contact head and fitting.
  • the electrical pressure contact is widely used.
  • it may be part of a train coupling.
  • Fig. 1 to 5 show an embodiment of the invention electrical pressure contact with a housing sleeve 10, a contact facing, in the Fig. 1 and 2 upper end and a contact facing away, in the Fig. 1 and 2 bottom end has.
  • the housing sleeve axis is designated by the reference numeral 12.
  • a contact head 14 is mounted axially displaceable.
  • the contact head 14 has a contact facing portion 16 which is in the in Fig. 2 shown state of the pressure contact protrudes from the contact facing the end of the housing sleeve 10, and a contact facing away portion 18 which is located within the housing sleeve 10.
  • the diameter of the contact-facing portion 16 is greater than that of the contact-facing portion 18th
  • a Mixniet 20 is used for example made of silver, which is a contact facing bulging contact surface 22 has.
  • the contact surface 22 is for contact with a in the Fig. 1 and 2 Not shown mating contact determined.
  • a connector 30 is inserted, which has a contact facing portion 32 and a subsequent thereto contact remote portion 34.
  • the diameter of the portion 34 is greater than that of the portion 32.
  • the fitting 30 is fixed on its larger diameter portion 34 on the inner surface of the housing sleeve 10, for example in a press fit.
  • the connector 30 further has a contact remote end 36 which protrudes from the contact remote from the end of the housing sleeve 10.
  • the connection piece 30, in contrast to the contact head 14, is arranged immovably in the housing sleeve 10.
  • a contact-facing bore 38 is formed, which corresponds to the in Fig. 2 not shown mating contact is open.
  • the bore 38 is formed as a blind bore.
  • the length of the contact facing away portion 18 of the contact head 14 and the length of the blind bore 38 are dimensioned so that the contact facing away portion 18 is completely received in the blind bore 38 when the mating contact pushes the contact head 14 in the housing sleeve 10.
  • a shoulder 40 formed on the contact head 14 comes into abutment with the contact-facing end of the connecting piece 30.
  • the contact-facing portion 18 of the contact head 14 and the blind bore 38 have approximately the same length. This means that the blind bore 38 is filled with completely inserted into the housing sleeve 10 contact head 14 substantially over its entire length of the contact facing portion 18.
  • a coil spring 42 is arranged, which biases the contact head 14 in the contact direction.
  • the coil spring 42 rests with its contact-facing end against the shoulder 40 formed on the contact head 14, while it bears with its contact remote end against a shoulder 44 which is formed by the contact-facing end face of the larger diameter portion 34 of the connecting piece 30.
  • the contact head 14 is thus inserted by the action of the mating contact against the spring force of the coil spring 42 in the housing sleeve 10.
  • the blind bore 38 has a contact-facing part 46 and a contact-facing part 48.
  • the diameter of the contact-facing part 46 is slightly larger than the diameter of the contact-facing part 48.
  • the transition between the two parts 46 and 48 of the blind bore 38 is formed by a shoulder 50.
  • the contact element 60 is a tubular element made of metal, for example silver-plated brass. It has a contact-facing end 62 and a contact-remote end 64, each having an annular, straight in the longitudinal direction outer surface 66 and 68 respectively. With the outer surfaces 66 and 68, the contact element 60 is located on the inner wall of the larger diameter portion 46 of the blind bore 38 at. In addition, located at 69 facing away from the contact end face of the end 64 of the contact element 60 to the shoulder 50, which is formed between the two parts 46 and 48 of the blind bore 38.
  • the outer diameter of the two ends 62 and 64 of the contact element 60 correspond to the diameter of the larger diameter portion 46 of the blind bore 38. Due to the above-mentioned dimensions of the contact element 60, the latter sits firmly in the larger diameter portion 46 of the blind bore 38th
  • the contact element 60 has in its lying between the two ends 62 and 64 part a plurality of concave inwardly adjacent, circumferentially adjacent and extending in the longitudinal direction contact blades 70.
  • the contact blades 70 are formed by areas of the contact element 60, between in the wall of the contact element 60 formed slots 72 are adjacent to each other in the circumferential direction of the contact element 60 and extend parallel to the housing sleeve axis 12 in the longitudinal direction.
  • the contact element 60 is designed so that its contact blades 70 are elastically resilient.
  • the contact element 60 further has in its wall a continuous mounting slot 74.
  • This mounting slot 74 allows the contact element 60 during assembly to compress so that the mutually facing end faces of the mounting slot 74 come into contact with each other. As a result, the diameter of the contact element is reduced, so that the latter can be used in the larger diameter portion 46 of the blind bore 38.
  • the contact blades 70 are rubbing against the outer surface of the contact facing away portion 18 of the contact head 14. Characterized a permanent contact of the contact element 60 is provided with the contact head 14 when it is moved by the action of the mating contact, not shown in the blind bore 38. In addition, the contact facing away portion 18 is mechanically guided by the surrounding contact element 60. The elastic action of the contact element 60 is advantageous both for the electrical contacting and for the mechanical guidance of the contact head 14.
  • the contact head 14 If the contact head 14 is inserted into the housing sleeve 10, then the contact remote from the end of the smaller diameter portion 18 of the contact head 14 passes through the contact element 60 into the smaller diameter portion 48 of the blind bore 38 a.
  • the dimensions of the pressure contact are chosen so that in the in Fig. 2 shown state in which the contact head 14 protrudes maximally from the contact-facing end of the housing sleeve 10, the contact facing away portion 18 of the contact head 14 is almost completely received in the contact element 60.
  • the contact surface between the contact head 14 and the contact element 60 during the insertion of the contact head 14 in the housing sleeve 10 is substantially constant. It follows that the contact resistance between the contact head 14 and the contact element 60 is practically constant over the entire length of the contact stroke.
  • the power transmission takes place from the mating contact, not shown, via the contact rivet 20, the contact head 14, the contact element 60 and the connection piece 30 to an electrical supply line, not shown, which is fastened to the contact 36 facing away from the connecting piece 30.
  • a power transmission via the housing sleeve 10 is therefore not required.
  • the bore 38 formed in the connection piece 30 forms a separate contact space within the housing sleeve 10.
  • This contact space is largely sealed off from the space surrounding it within the housing sleeve 10.
  • sealing element may be arranged in the bore 38, which seals the contact space with respect to the surrounding space.
  • a suitable contact grease can be introduced in the region of the contact element.
  • This contact grease is protected by its arrangement in the sealed contact space from environmental influences, for example, from dust, which passes into the interior of the housing sleeve, or particles that arise as a result of the contact strokes, for example by abrasion within the housing sleeve 10. Since the contact grease in the contact space does not pollute and does not escape from it, it generally does not have to be replaced even after a large number of contact strokes. The pressure contact therefore requires no special maintenance with regard to the contact fat used in it.
  • the electrical pressure contact according to the invention is not limited to the above embodiment.
  • the contact element does not have to be formed in one piece. It may also extend over the entire length of the bore provided in the connector.

Landscapes

  • Measuring Leads Or Probes (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Inorganic Insulating Materials (AREA)
  • Secondary Cells (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP05774246A 2004-07-13 2005-07-13 Elektrischer druckkontakt Expired - Lifetime EP1776740B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004033864A DE102004033864A1 (de) 2004-07-13 2004-07-13 Elektrischer Druckkontakt
PCT/EP2005/007638 WO2006005614A1 (de) 2004-07-13 2005-07-13 Elektrischer druckkontakt

Publications (2)

Publication Number Publication Date
EP1776740A1 EP1776740A1 (de) 2007-04-25
EP1776740B1 true EP1776740B1 (de) 2010-11-17

Family

ID=35134762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05774246A Expired - Lifetime EP1776740B1 (de) 2004-07-13 2005-07-13 Elektrischer druckkontakt

Country Status (9)

Country Link
US (1) US7682206B2 (tr)
EP (1) EP1776740B1 (tr)
JP (1) JP2008507081A (tr)
CN (1) CN1973409B (tr)
AT (1) ATE488886T1 (tr)
AU (1) AU2005261779B2 (tr)
DE (2) DE102004033864A1 (tr)
ES (1) ES2356562T3 (tr)
WO (1) WO2006005614A1 (tr)

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HK1104122A1 (zh) 2008-01-04
CN1973409B (zh) 2010-05-26
DE102004033864A1 (de) 2006-02-16
US7682206B2 (en) 2010-03-23
CN1973409A (zh) 2007-05-30
EP1776740A1 (de) 2007-04-25
WO2006005614A1 (de) 2006-01-19
DE502005010561D1 (de) 2010-12-30
ATE488886T1 (de) 2010-12-15
US20090004929A1 (en) 2009-01-01
ES2356562T3 (es) 2011-04-11
JP2008507081A (ja) 2008-03-06
AU2005261779A1 (en) 2006-01-19
AU2005261779B2 (en) 2009-11-26

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