EP1776740A1 - Contact a pression electrique - Google Patents

Contact a pression electrique

Info

Publication number
EP1776740A1
EP1776740A1 EP05774246A EP05774246A EP1776740A1 EP 1776740 A1 EP1776740 A1 EP 1776740A1 EP 05774246 A EP05774246 A EP 05774246A EP 05774246 A EP05774246 A EP 05774246A EP 1776740 A1 EP1776740 A1 EP 1776740A1
Authority
EP
European Patent Office
Prior art keywords
contact
bore
facing
head
housing 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.)
Granted
Application number
EP05774246A
Other languages
German (de)
English (en)
Other versions
EP1776740B1 (fr
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(A1) "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/fr
Application granted granted Critical
Publication of EP1776740B1 publication Critical patent/EP1776740B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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 with a contact-facing and a contact-facing end, an axially slidably 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 the contact head can be pushed into the housing sleeve, and a contact piece arranged at the end of the housing sleeve arranged, conductive connecting piece for fixing an electrical supply line.
  • Electrical pressure contacts of the type described above are used for example for current or signal transmission between mutually movable Ele ⁇ 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.
  • the state of the art is referred to an electrical pressure contact, which is described in EP 1 289 072 A2.
  • This pressure contact has an axially flexible electrical line which is clamped with its end facing the contact in an axial bore formed at the contact-remote end of the contact head and with its axial end remote from the contact in an end of the connecting piece facing the contact.
  • 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.
  • the section 2 of a contact head 3 pushed in contact-contact, ie inserted into a housing sleeve 1 is designed 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 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 is therefore no longer available for contact lubrication or for example by dust particles verunrei ⁇ nigt, which at the contact-facing end of the contact head. 3 adhere and enter when pushing into the interior of the housing sleeve 1. 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 detergents usually used have a degreasing effect and, when they reach the interior of the housing sleeve 1 as a result of the lifting movements of the contact head 3, the contact grease likewise gradually becomes ineffective.
  • the pressure contact must be disassembled, which is tedious, time consuming and costly.
  • the present invention seeks to provide an electrical pressure contact of the type mentioned above, which is simple and over a long time a uniformly good Radio- hold both in terms of its mechanical properties and its electrical properties.
  • the invention solves this problem in that the connector has a kon ⁇ clock-facing axial bore within the housing sleeve in which a koaxi ⁇ al arranged to contact non-contact portion of the contact head for making the electrical contact between the contact head and fitting is axially displaceable.
  • the electrical contact between the contact head and the connecting piece is produced in that the contact-remote portion of the contact head is axially displaceable in the formed in the An ⁇ closing piece contact-facing 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. A contact fat can be introduced into this separate contact space, which keeps the contact resistance between the contact head and the connecting piece small and also ensures that the portion facing away from the contact is displaceable in the axial bore of the connecting piece.
  • 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 Montageauf ⁇ wall replacement of the contact grease is therefore not required even with a long service life.
  • the invention accordingly provides an electrical pressure contact, which is particularly well protected against environmental influences and requires virtually no maintenance.
  • a conductive contact element is seated in the bore coaxially with the latter and abrades the outer surface of the contact-facing section of the contact head which is 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-remote section of the contact head moving in it, so that reliable contact is ensured.
  • the Stromübertra ⁇ supply takes place with advantageously low contact resistance of the contact head via the contact element directly, i. without going through the housing sleeve, on the connector.
  • the contact element which is firmly seated in the bore of the connection piece, ensures on the one hand good mechanical guidance of the contact head pushed into the bore and, on the other hand, good electrical contact between the contact head and the connection piece. As a result, a constant contact resistance is ensured even after a large number of contact strokes.
  • the pressure contact thus exhibits a consistently good operating behavior over a long service life.
  • the contact element is a metallic, tubular element in which the contact facing Ab ⁇ section of the contact head is always at least partially received and the concave inwardly concave, adjacent in the circumferential direction has and extending in the longitudinal direction of the contact blades, which are resiliently biased to the outer surface of the received in the contact element of the Kunststoffkop ⁇ fes.
  • the elastically acting contact blades provide both good mechanical guidance and secure contacting of the contact head.
  • the contact element has several circumferentially demoeinan ⁇ derlying 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 asanna ⁇ det, which passes through the contact element over its entire length.
  • the contact element is reduced so as to reduce the width of the mounting slot so that the diameter of the contact element is reduced.
  • the contact element is arranged in an interference fit in the bore of the Anschluß ⁇ piece. This also simplifies the structure of the pressure contact.
  • the bore of the An ⁇ closing piece has a larger diameter portion, a smaller diameter part 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.
  • This configuration makes it possible to mount the contact element in a particularly simple manner in the bore of the Anschluß ⁇ piece. Since the contact element is arranged in the larger diameter part of the bore, the contact facing away from the contact Kop ⁇ fes can be inserted through the contact element through into the smaller diameter part of the bore. With good mechanical guidance and reliable contacting of the contact head, this allows a particularly compact construction of the pressure contact.
  • 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 part of the bore in its entire length and is fixed radially in this part of the bore via its two ends. 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 maxi ⁇ inserted into the housing sleeve, while it is received only with its contactab- turned end in the larger diameter part of the bore when the contact head from the maximum projecting end of the housing sleeve protrudes.
  • 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 non-contacting portion of the contact head is formed as a hollow cylinder whose wall is provided with a plurality of longitudinal slots, whereby resilient conversion sectors are formed, which abut the inner surface of the bore grinding.
  • such an embodiment corresponds to the known from DE 39 38 706 C1 printhead.
  • the connecting piece has a larger diameter portion facing away from the contact via which it is fastened to the inner wall of the housing sleeve and a contact-facing, smaller portion, that the contact head has a contact-facing larger diameter portion and the contact-facing portion with a smaller diameter and that the biasing member is a Schrau ⁇ benfeder surrounding the non-contact portion of the contact head and the contact-facing portion of the connector.
  • the space defined in the housing sleeve about the interlocking arrangement of the contact head and fitting i. the above-mentioned Kon ⁇ contact space, is present, forming a biasing element coil spring.
  • the electrical pressure contact is widely used.
  • it may be part of a train coupling.
  • FIG. 3 shows a perspective view of a contact element arranged in the electrical pressure contact
  • Fig. 5 is a plan view of the contact element
  • FIG. 6 shows a longitudinal section through a known from the prior art th electrical pressure contact.
  • FIG. 1 to 5 show an embodiment of the electrical pressure contact according to the invention with a housing sleeve 10, which has a contact facing, in Figs. 1 and 2 upper end and a contact facing away, in the Fig. 1 and 2 unte ⁇ res end.
  • the housing sleeve axis is denoted by the reference numeral 12.
  • a contact head 14 is mounted axially displaceable.
  • the contact head 14 has a contact-facing portion 16, which protrudes in the state shown in Fig. 2 of the pressure contact from the contact-facing end of the housing sleeve 10, and a contact-facing portion 18, which is located within the housing sleeve 10.
  • the diameter of the contact facing portion 16 is greater than that of the portion facing away from contact 18.
  • 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 intended for contact with a counter contact, not shown in FIGS. 1 and 2.
  • 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 connecting piece 30 is fixed on its larger diameter portion 34 on the inner surface of the Genzous ⁇ sleeve 10, for example in an interference 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 is open to the mating contact, not shown in FIG.
  • the bore 38 is designed as a blind bore.
  • the contact facing away portion 18 of the contact head 14 is inserted, wherein in the state shown in Fig. 2, the contact facing away portion 18 is only with its free end in the bore 38.
  • the length of the contact-facing portion 18 of the contact head 14 and the length of the Sack ⁇ 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 section 18 of the contact head 14 and the blind bore 38 have approximately the same length.
  • 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-turned 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 a Schul ⁇ ter 50 formed.
  • 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 of outer surface 66 and 68 respectively. With the outer surfaces 66 and 68, the contact element 60 bears against the inner wall of the larger-diameter part 46 of the blind bore 38. In addition, the contact face facing away from the end face 64 of the contact element 60, which is denoted by 69, bears against the shoulder 50, which is formed between the two parts 46 and 48 of the blind bore 38.
  • the length of the contact element 60 corresponds to the length of the larger diameter portion 46 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.
  • the contact element 60 has in its lying between the two ends 62 and 64 part a plurality of concave inwardly, circumferentially demo ⁇ juxtaposed and extending in the longitudinal direction contact blades 70.
  • the contact blades 70 are formed by areas of the contact element 60, which between in the wall the contact element 60 formed slots 72 which lie in the circumferential direction of the contact element 60 next to each other and extend in the longitudinal direction parallel to the housing sleeve axis 12.
  • the contact element 60 is designed in such a way that its contact blades 70 are elastically springy.
  • the contact element 60 further has a continuous mounting slot 74 in its wall.
  • This mounting slot 74 allows the contact element 60 to be compressed during assembly in such a way that the mutually facing end surfaces of the mounting slot 74 come into abutment with one another. 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 abradingly against the outer surface of the contact-facing 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. If the contact head 14 is inserted into the housing sleeve 10, the contact-remote end of the smaller-diameter section 18 of the contact head 14 passes through the contact element 60 into the smaller-diameter part 48 of the blind bore 38.
  • the dimensions of the pressure contact are selected so that in the state shown in FIG. 2, in which the contact head 14 protrudes maximally from the contact-facing end of the housing sleeve 10, the contact-facing section 18 of the contact head 14 almost completely the contact element 60 is received.
  • 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 is transmitted 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 in the bore 38 may be arranged, 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 60.
  • This contact grease is protected by its arrangement in the ist ⁇ 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.
  • the contact element 60 can also be omitted.
  • the contact-facing section 18 of the contact head 14 received in the bore 38 can also be designed as a hollow cylinder, as described in DE 39 38 706 C1.
  • resilient Wandungssek ⁇ gates are formed on the contact head, which bear against the inner surface of the bore 38.

Landscapes

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

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 (fr) 2004-07-13 2005-07-13 Contact a pression electrique

Publications (2)

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

Family

ID=35134762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05774246A Active EP1776740B1 (fr) 2004-07-13 2005-07-13 Contact a pression electrique

Country Status (10)

Country Link
US (1) US7682206B2 (fr)
EP (1) EP1776740B1 (fr)
JP (1) JP2008507081A (fr)
CN (1) CN1973409B (fr)
AT (1) ATE488886T1 (fr)
AU (1) AU2005261779B2 (fr)
DE (2) DE102004033864A1 (fr)
ES (1) ES2356562T3 (fr)
HK (1) HK1104122A1 (fr)
WO (1) WO2006005614A1 (fr)

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AU2005261779A1 (en) 2006-01-19
ES2356562T3 (es) 2011-04-11
CN1973409A (zh) 2007-05-30
CN1973409B (zh) 2010-05-26
AU2005261779B2 (en) 2009-11-26
WO2006005614A1 (fr) 2006-01-19
ATE488886T1 (de) 2010-12-15
DE502005010561D1 (de) 2010-12-30
US7682206B2 (en) 2010-03-23
HK1104122A1 (en) 2008-01-04
EP1776740B1 (fr) 2010-11-17
JP2008507081A (ja) 2008-03-06
US20090004929A1 (en) 2009-01-01
DE102004033864A1 (de) 2006-02-16

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