EP0525222A1 - Sliding contact piece for high current densities - Google Patents

Sliding contact piece for high current densities Download PDF

Info

Publication number
EP0525222A1
EP0525222A1 EP91112222A EP91112222A EP0525222A1 EP 0525222 A1 EP0525222 A1 EP 0525222A1 EP 91112222 A EP91112222 A EP 91112222A EP 91112222 A EP91112222 A EP 91112222A EP 0525222 A1 EP0525222 A1 EP 0525222A1
Authority
EP
European Patent Office
Prior art keywords
contact piece
sliding contact
admixture
copper
piece according
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
EP91112222A
Other languages
German (de)
French (fr)
Other versions
EP0525222B1 (en
Inventor
Ehrhard Dipl.-Ing. Grohs
Conrad Dr. Reynvaan
Lothar Dipl.-Chem. Biering
Jürgen Dipl.-Ing. Spangenberg
Klaus Dipl.-Ing. Groht
Arwed Dr. Uecker
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.)
Deutsche Carbone AG
Original Assignee
Deutsche Carbone 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
Priority to DE59105627T priority Critical patent/DE59105627D1/en
Application filed by Deutsche Carbone AG filed Critical Deutsche Carbone AG
Priority to EP91112222A priority patent/EP0525222B1/en
Priority to AT91112222T priority patent/ATE123360T1/en
Priority to ES91112222T priority patent/ES2072489T3/en
Priority to KR1019920012995A priority patent/KR950012479B1/en
Priority to BR929202788A priority patent/BR9202788A/en
Priority to US07/917,712 priority patent/US5270504A/en
Priority to JP4195049A priority patent/JPH0782898B2/en
Publication of EP0525222A1 publication Critical patent/EP0525222A1/en
Application granted granted Critical
Publication of EP0525222B1 publication Critical patent/EP0525222B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
    • 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
    • H01R43/12—Manufacture of brushes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres

Definitions

  • sliding contact pieces are in particular carbon brushes, e.g. for starters, as well as grinding pieces, e.g. for pantographs.
  • a first possibility is characterized in that the admixture is coated in such a way that it does not form any alloy with the copper.
  • the primary consideration here is to coat the admixture before it is introduced into the mold for producing the sliding contact piece.
  • the admixture is introduced into a binder in such a way that it does not form any alloy with the copper.
  • the binder can also be carbon (graphite), possibly with other binder additives. It is also important here that the admixture is covered by the binder.

Abstract

A sliding-contact piece for high current densities is described with an admixture which does not require significant additions of lead or antimony. These toxic metals are avoided. Without loss of quality they are replaced by nontoxic metals or metal alloys.

Description

Die Erfindung betrifft ein Gleitkontaktstück auf Kupfer-Kohlenstoffbasis für hohe Stromdichten mit einer Beimengung eines Metalls oder einer Metallegierung, deren Schmelztemperatur wesentlich unter derjenigen des Kupfers liegt.The invention relates to a sliding contact piece based on copper-carbon for high current densities with an admixture of a metal or a metal alloy, the melting temperature of which is significantly lower than that of the copper.

Derartige Gleitkontaktstücke sind insbesondere Kohlebürsten, z.B. für Starter, wie auch Schleifstükke, z.B. für Pantographen.Such sliding contact pieces are in particular carbon brushes, e.g. for starters, as well as grinding pieces, e.g. for pantographs.

Übliche Gleitkontaktstücke enthalten Zusätze von Blei oder Antimon. Zweck der Zusätze ist eine gute Putzwirkung, eine Kühlung des Kontaktstücks im Betrieb und auch eine gute Gleitfähigkeit am Gegenkontaktstück. Diese bekannten Zusätze sind aber giftig bzw. umweltschädlich.Usual sliding contact pieces contain additives of lead or antimony. The purpose of the additives is a good cleaning effect, cooling of the contact piece during operation and also good sliding properties on the counter contact piece. However, these known additives are toxic or harmful to the environment.

Demgegenüber liegt daher der Erfindung die Aufgabe zugrunde, ein Gleitkontaktstück vorzuschlagen, das ohne wesentliche Zusätze an Blei oder Antimon auskommt, ohne daß darunter die Betriebseigenschaften des Gleitkontaktstücks leiden.In contrast, the invention is therefore based on the object of proposing a sliding contact piece which does not require any significant additions of lead or antimony, without the operating properties of the sliding contact piece suffering as a result.

Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, daß die Beimengung von Kupfer getrennt ist und keine wesentlichen Anteil an Blei oder Antimon enthält.To achieve this object, the invention is characterized in that the admixture is separated from copper and contains no significant proportion of lead or antimony.

Man verwendet somit umweltunschädliche Beimengungen, vorzugsweise Zinn oder Zink. Diese Beimengungen kann man aber den Grundbestandteilen (Kupfer, Graphit) nicht einfach beimischen, weil sich dann eine Legierung ergäbe, die für den gewünschten Zweck viel zu härt wäre und die auch keinen ausreichend niedrigen Schmelzpunkt hätte. Statt dessen geht man erfindungsgemäß den Weg, die Beimengung von Kupfer derart zu trennen, daß sie mit dem Kupfer keine Legierung eingehen kann. Sie liegt im Gleitkontaktstück also als solche vor und erfüllt dort ihre Aufgabe, wobei das Gleitkontaktstück praktisch keine Anteile an Blei oder Antimon mehr enthält.Environmentally harmless admixtures are used, preferably tin or zinc. However, these additives cannot simply be added to the basic components (copper, graphite) because this would result in an alloy that would be much too hard for the desired purpose and which would not have a sufficiently low melting point. Instead, the method according to the invention is to separate the admixture of copper in such a way that it cannot form an alloy with the copper. It is thus present in the sliding contact piece as such and fulfills its task there, the sliding contact piece practically containing no more lead or antimony.

Für die angestrebte Trennung der Beimengung vom Grundbestandteil (Kupfer-Kohlenstoff) gibt es mehrere Möglichkeiten. Eine erste Möglichkeit ist dadurch gekennzeichnet, daß die Beimengung derart beschichtet wird, daß sie mit dem Kupfer keine Legierung eingeht. Hierbei ist in erster Linie an eine Beschichtung der Beimengung vor dem Einbringen in die Preßform zur Herstellung des Gleitkontaktstücks gedacht.There are several options for separating the admixture from the basic component (copper-carbon). A first possibility is characterized in that the admixture is coated in such a way that it does not form any alloy with the copper. The primary consideration here is to coat the admixture before it is introduced into the mold for producing the sliding contact piece.

Eine andere Möglichkeit ist dadurch gekennzeichnet, daß die Beimengung derart in ein Bindemittel eingebracht wird, daß sie mit dem Kupfer keine Legierung eingeht. Hierbei erfolgt die Trennung also beim Herstellungsprozeß des Gleitkontaktstückes. Das Bindemittel kann hierbei auch der Kohlenstoff (Graphit) sein, ggf. mit anderen Bindemittelzusätzen. Wesentlich ist es auch hier, daß die Beimengung von dem Bindemittel überzogen wird.Another possibility is characterized in that the admixture is introduced into a binder in such a way that it does not form any alloy with the copper. Here, the separation takes place during the manufacturing process of the sliding contact piece. The binder can also be carbon (graphite), possibly with other binder additives. It is also important here that the admixture is covered by the binder.

Eine dritte Möglichkeit besteht darin, daß das Gleitkontaktstück aus mehreren Schichten besteht, die nebeneinander so angeordnet sind, daß sie gemeinsam einen Gegenkontakt (Stromabnehmer, Kollektor) berühren und die getrennt voneinander das Kupfer bzw. die Beimengung enthalten. Die einzelnen Schichten werden miteinander verpreßt oder verklebt und bilden dadurch das Gleitkontaktstück aus. Wenn im Rahmen dieser Erfindung daher von einer Beimengung gesprochen wird, so beinhaltet dies auch ein Gleitkontaktstück mit nebeneinander angeordneten, diskreten und zu dem Gleitkontaktstück miteinander verbunden Schichten, die jeweils getrennt voneinander das Kupfer bzw. die Beimengung enthalten.A third possibility is that the sliding contact piece consists of several layers which are arranged next to one another in such a way that they touch a counter contact (current collector, collector) and which contain the copper or the admixture separately from one another. The individual layers are pressed or glued together and thereby form the sliding contact piece. If, within the scope of this invention, one speaks of an admixture, this also includes a sliding contact piece with discrete layers which are arranged next to one another and which are connected to one another to form the sliding contact piece and which each contain the copper or the admixture separately from one another.

Die in Anspruch 6 angesprochenen Gewichtsanteile an Beimengungen sind üblich.The proportions by weight of admixtures mentioned in claim 6 are common.

Anspruch 7 gibt bevorzugte Bindemittel bzw. Beschichtungsmittel an. Es sei erwähnt, daß diese beim Herstellungsvorgang durch Verkoken elektrisch leitend werden.Claim 7 indicates preferred binders or coating agents. It should be mentioned that they become electrically conductive by coking during the manufacturing process.

Anspruch 8 gibt abermals bevorzugte Binde- bzw. Beschichtungsmittel an.Claim 8 again specifies preferred binding agents or coating agents.

Die Schmelztemperatur der gewählten Beimengung liegt wesentlich unter derjenigen von Kupfer und das Oxid der Beimengung ist nicht härter als ca. 7, gemessen auf der Mohsschen Härteskala.The melting temperature of the selected admixture is significantly lower than that of copper and the oxide of the admixture is not harder than approx. 7, measured on the Mohs hardness scale.

Claims (8)

1. Gleitkontaktstück für hohe Stromdichten auf Kupfer-Kohlenstoffbasis mit einer Beimengung eines Metalls oder einer Metallegierung, deren Schmelztemperatur wesentlich unter derjenigen des Kupfers liegt,
dadurch gekennzeichnet,
daß die Beimengung vom Kupfer getrennt ist und keine wesentlichen Anteile an Blei oder Antimon enthält.1. sliding contact piece for high current densities based on copper-carbon with an admixture of a metal or a metal alloy, the melting temperature of which is significantly lower than that of the copper,
characterized,
that the admixture is separated from the copper and contains no significant amounts of lead or antimony. 2. Gleitkontaktstück nach Anspruch 1,
dadurch gekennzeichnet,
daß die Beimengung derart beschichtet ist, daß sie mit dem Kupfer keine Legierung eingeht.2. sliding contact piece according to claim 1,
characterized,
that the admixture is coated in such a way that it does not form an alloy with the copper. 3. Gleitkontaktstück nach Anspruch 1,
dadurch gekennzeichnet,
daß die Beimengung derart in ein Bindemittel eingebracht ist, daß sie mit dem Kupfer keine Legierung eingeht.3. sliding contact piece according to claim 1,
characterized,
that the admixture is introduced into a binder such that it does not form an alloy with the copper. 4. Gleitkontaktstück nach Anspruch 1,
dadurch gekennzeichnet,
daß es aus mehreren Schichten besteht, die nebeneinander so angeordnet sind, daß sie gemeinsam einen Gegenkontakt berühren und die getrennt voneinander das Kupfer bzw. die Beimengung enthalten.4. sliding contact piece according to claim 1,
characterized,
that it consists of several layers, which are arranged side by side so that they touch a counter contact together and which contain the copper or the admixture separately. 5. Gleitkontaktstück nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Beimengung im wesentlichen Zinn und/oder Zink oder deren Legierungen enthält.5. Sliding contact piece according to one of claims 1 to 4,
characterized,
that the admixture contains essentially tin and / or zinc or their alloys. 6. Gleitkontaktstück nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß es weniger als 10 Gew.% an Beimengungen enthält.6. sliding contact piece according to one of claims 1 to 5,
characterized,
that it contains less than 10% by weight of admixtures. 7. Gleitkontaktstück nach Anspruch 2 oder 3,
dadurch gekennzeichnet,
daß das Bindemittel bzw. Beschichtungsmittel ein Duroplast, ein Thermoplast, Teer, Pech, Wasserglas, ein Metall und/oder Graphit ist.7. sliding contact piece according to claim 2 or 3,
characterized,
that the binder or coating agent is a thermoset, a thermoplastic, tar, pitch, water glass, a metal and / or graphite. 8. Gleitkontaktstück nach Anspruch 7,
dadurch gekennzeichnet,
daß das Binde- bzw. Beschichtungsmittel ein Kunstharz, Chrom oder Nickel oder eine Legierung dieser Metalle ist.8. sliding contact piece according to claim 7,
characterized,
that the binder or coating agent is a synthetic resin, chromium or nickel or an alloy of these metals.
EP91112222A 1991-07-22 1991-07-22 Sliding contact piece for high current densities Expired - Lifetime EP0525222B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP91112222A EP0525222B1 (en) 1991-07-22 1991-07-22 Sliding contact piece for high current densities
AT91112222T ATE123360T1 (en) 1991-07-22 1991-07-22 SLIDING CONTACT PIECE FOR HIGH CURRENT DENSITIES.
ES91112222T ES2072489T3 (en) 1991-07-22 1991-07-22 SLIDING CONTACT PART FOR HIGH CURRENT DENSITIES.
DE59105627T DE59105627D1 (en) 1991-07-22 1991-07-22 Sliding contact piece for high current densities.
KR1019920012995A KR950012479B1 (en) 1991-07-22 1992-07-21 Sliding contact member for high current densities
BR929202788A BR9202788A (en) 1991-07-22 1992-07-21 SLIDING CONTACT PIECE FOR ATLAS CHAIN DENSITIES AND STARTING MOTOR WITH COAL BRUSHES
US07/917,712 US5270504A (en) 1991-07-22 1992-07-21 Sliding contact member for high currrent densities
JP4195049A JPH0782898B2 (en) 1991-07-22 1992-07-22 High current density sliding contact member or sliding member and starter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91112222A EP0525222B1 (en) 1991-07-22 1991-07-22 Sliding contact piece for high current densities

Publications (2)

Publication Number Publication Date
EP0525222A1 true EP0525222A1 (en) 1993-02-03
EP0525222B1 EP0525222B1 (en) 1995-05-31

Family

ID=8206964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112222A Expired - Lifetime EP0525222B1 (en) 1991-07-22 1991-07-22 Sliding contact piece for high current densities

Country Status (8)

Country Link
US (1) US5270504A (en)
EP (1) EP0525222B1 (en)
JP (1) JPH0782898B2 (en)
KR (1) KR950012479B1 (en)
AT (1) ATE123360T1 (en)
BR (1) BR9202788A (en)
DE (1) DE59105627D1 (en)
ES (1) ES2072489T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858473A1 (en) * 2003-08-01 2005-02-04 Carbone Lorraine Applications Electriques Sliding electric contact of carbon, copper and zinc and containing iron-based particles, e.g. for brushes of electric motors and motor vehicle starter motors
DE10201923B4 (en) * 2002-01-19 2006-05-24 Deutsche Carbone Ag Method for producing a sliding contact piece for medium to high current densities

Families Citing this family (16)

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US6123252A (en) * 1999-03-19 2000-09-26 Deutsche Carbone Ag Process for fixing a graphite-rich material onto a metallic body
SE9904350D0 (en) * 1999-11-30 1999-11-30 Abb Ab A contact element and a contact arrangement
JP3770476B2 (en) 2001-10-25 2006-04-26 トライス株式会社 Metal graphite brush
JP3661784B2 (en) * 2001-10-25 2005-06-22 トライス株式会社 Metal graphite brush
JP3929746B2 (en) * 2001-10-25 2007-06-13 トライス株式会社 Metal graphite brush
JP3797662B2 (en) * 2002-01-30 2006-07-19 トライス株式会社 Copper graphite brush
JP3914804B2 (en) * 2002-04-04 2007-05-16 トライス株式会社 Metallic graphite brush and method for producing the same
JP4512318B2 (en) * 2003-02-04 2010-07-28 日立化成工業株式会社 Laminated brush
GB0303752D0 (en) * 2003-02-18 2003-03-26 Morgan Crucible Co Composite electrical brush construction
DE10359896A1 (en) * 2003-12-19 2005-07-21 Hoffmann & Co. Elektrokohle Ag Carbon brush and method and material for their production
DE10361166A1 (en) * 2003-12-22 2005-07-28 Meisel, Jörg, Dr. Component for a prosthesis, especially a cervica vertebra, comprises two base parts coupled together by a hinge
WO2005099048A1 (en) * 2004-04-08 2005-10-20 Carbone Lorraine Applications Electriques Lead-free brush grade for high temperature applications
JP2006320067A (en) * 2005-05-11 2006-11-24 Hitachi Chem Co Ltd Process of metal graphite brush
US8309773B2 (en) 2010-02-02 2012-11-13 Calanese International Corporation Process for recovering ethanol
JP5901279B2 (en) * 2011-01-31 2016-04-06 トライス株式会社 Carbon commutator and manufacturing method thereof
CN111082607A (en) * 2018-10-22 2020-04-28 株式会社电装 Electrical contact device and rotating electrical machine comprising an electrical contact device

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CH589917A5 (en) * 1974-05-13 1977-07-29 Lonza Ag Graphite mouldings contg. fine metal powder - with optimum electrical conductivity and abrasion resistance, suitable for brushes
DE3217217A1 (en) * 1981-05-09 1982-12-09 Japan Marine Machinery Development Association, Tokyo CONTACT BRUSHES AND METHOD FOR THEIR PRODUCTION

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Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE154287C (en) *
DE289101C (en) *
CH589917A5 (en) * 1974-05-13 1977-07-29 Lonza Ag Graphite mouldings contg. fine metal powder - with optimum electrical conductivity and abrasion resistance, suitable for brushes
DE3217217A1 (en) * 1981-05-09 1982-12-09 Japan Marine Machinery Development Association, Tokyo CONTACT BRUSHES AND METHOD FOR THEIR PRODUCTION

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10201923B4 (en) * 2002-01-19 2006-05-24 Deutsche Carbone Ag Method for producing a sliding contact piece for medium to high current densities
FR2858473A1 (en) * 2003-08-01 2005-02-04 Carbone Lorraine Applications Electriques Sliding electric contact of carbon, copper and zinc and containing iron-based particles, e.g. for brushes of electric motors and motor vehicle starter motors
WO2005020390A1 (en) * 2003-08-01 2005-03-03 Carbone Lorraine Applications Electriques Sliding electrical contact part
US7525232B2 (en) 2003-08-01 2009-04-28 Carbone Larraine Applications Electriques Sliding electrical contact part

Also Published As

Publication number Publication date
US5270504A (en) 1993-12-14
BR9202788A (en) 1993-03-23
KR930003469A (en) 1993-02-24
KR950012479B1 (en) 1995-10-18
JPH0782898B2 (en) 1995-09-06
EP0525222B1 (en) 1995-05-31
ATE123360T1 (en) 1995-06-15
JPH05226048A (en) 1993-09-03
ES2072489T3 (en) 1995-07-16
DE59105627D1 (en) 1995-07-06

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