EP0148367B1 - Méthode pour la diminution et la stabilisation de la résistance de passage d'un balai de charbon et d'un toron de raccordement - Google Patents

Méthode pour la diminution et la stabilisation de la résistance de passage d'un balai de charbon et d'un toron de raccordement Download PDF

Info

Publication number
EP0148367B1
EP0148367B1 EP84113666A EP84113666A EP0148367B1 EP 0148367 B1 EP0148367 B1 EP 0148367B1 EP 84113666 A EP84113666 A EP 84113666A EP 84113666 A EP84113666 A EP 84113666A EP 0148367 B1 EP0148367 B1 EP 0148367B1
Authority
EP
European Patent Office
Prior art keywords
strand
carbon brush
stabilization
diminution
lead
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
Application number
EP84113666A
Other languages
German (de)
English (en)
Other versions
EP0148367A1 (fr
Inventor
Walter Dr. Holl
Rolf Lamparter
Martin Scholpp
Berthold Ulrich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0148367A1 publication Critical patent/EP0148367A1/fr
Application granted granted Critical
Publication of EP0148367B1 publication Critical patent/EP0148367B1/fr
Expired 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
    • H01R39/36—Connections of cable or wire to brush

Definitions

  • the invention is based on a method according to the preamble of the main claim.
  • a large part of the carbon brushes is manufactured today by pressing in a die. It is most economical if the connecting strands are pressed in at the same time. For this purpose, a straight strand end is immersed in the powder mixture and the powder is then compacted.
  • the quality of the anchoring depends, among other things, on the coal mixture used and the cross-section of the strand.
  • High-resistance carbon brushes and small wire cross sections result in high contact resistance. These in turn are sensitive to external and internal influences such as oxidation due to changes in temperature and climate, as well as shocks and the electrical current flowing through them. The higher the initial resistance, the greater the risk of a steady increase in resistance. The consequence of such processes is a loss of power and heating of the contact point by the current.
  • One way to overcome this problem is to use strands that are silver-plated in the contact area. However, such strands are expensive and are not necessarily a solution to the problem shown.
  • the method according to the invention with the characterizing features of the main claim has the advantage, in contrast, that the strand end bent over by 180 ° is introduced into the starting powder mixture and that the initial resistance to the straight strand ends is at least 50% lower and also remains constant in the further course.
  • the bent end of the strand receives a mushroom-shaped anchoring in the carbon brush during the compression, and the contact is much better due to the better form fit and the larger common surface between the strand and the carbon brush; moreover, the costs are hardly higher than in the method with a straight strand end and lower than in the complicated method in which the strand end has to be introduced into a channel.
  • bent end of the strand corresponds to approximately 0.5 times the total immersion length.
  • the compact After removing the compact from the press die, the compact is kept under a protective gas, e.g. B. sintered nitrogen or town gas, a mixture consisting essentially of hydrogen, methane and carbon monoxide. After cooling, the finished carbon brush with the pressed-in connecting wire is available.
  • a protective gas e.g. B. sintered nitrogen or town gas, a mixture consisting essentially of hydrogen, methane and carbon monoxide.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Claims (2)

1. Procédé pour diminuer et stabiliser de la résistance de passage électrique entre un balai de charbon compacté par un mélange de poudre et d'un toron de raccordement, selon lequel une extrémité du toron est plongée dans un mélange poudreux de départ et qui comporte de la poudre et du toron, caractérisé en ce que l'extrémité du toron est recourbée de 180° avant immersion dans la poudre.
2. Procédé selon la revendication 1, caractérisé en ce que la longueur de l'extrémité recourbée du toron correspond à environ 0,5 fois la longueur totale d'immersion.
EP84113666A 1983-12-09 1984-11-13 Méthode pour la diminution et la stabilisation de la résistance de passage d'un balai de charbon et d'un toron de raccordement Expired EP0148367B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833344556 DE3344556A1 (de) 1983-12-09 1983-12-09 Verfahren zur senkung und stabilisierung des uebergangswiderstandes zwischen einer kohlebuerste und einer anschlusslitze
DE3344556 1983-12-09

Publications (2)

Publication Number Publication Date
EP0148367A1 EP0148367A1 (fr) 1985-07-17
EP0148367B1 true EP0148367B1 (fr) 1987-08-05

Family

ID=6216487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113666A Expired EP0148367B1 (fr) 1983-12-09 1984-11-13 Méthode pour la diminution et la stabilisation de la résistance de passage d'un balai de charbon et d'un toron de raccordement

Country Status (2)

Country Link
EP (1) EP0148367B1 (fr)
DE (2) DE3344556A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29610353U1 (de) * 1996-06-13 1996-08-22 Deutsche Carbone Ag, 60437 Frankfurt Kohlebürste mit einem Stromableiter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1089700A (en) * 1911-11-17 1914-03-10 Gen Electric Current-collector and process of making the same.
CH63217A (fr) * 1912-11-26 1914-01-16 Carbone Sa L Dispositif de connexion électrique
US1719963A (en) * 1926-03-29 1929-07-09 Albert C Henry Composite electrical brush or contact and method of producing same
US2654038A (en) * 1950-11-25 1953-09-29 Speer Carbon Company Molded-in shunt electrical contact member
US3076908A (en) * 1960-02-10 1963-02-05 Owens Illinois Glass Co Carbon to metal bonded assembly and method of making same
FR1512525A (fr) * 1966-12-28 1968-02-09 Lorraine Carbone Perfectionnement au moulage des balais avec câble incorporé
DE1613356A1 (de) * 1967-08-31 1971-04-15 Ringsdorff Werke Gmbh Kohlebuerste fuer elektrische Maschinen mit eingepresstem Kabel sowie Verfahren und Vorrichtung zu ihrer Herstellung
DE2701829A1 (de) * 1977-01-18 1978-07-20 Hoffmann Elektrokohle Gepresste kohlebuerste mit mindestens einem eingepressten kabel

Also Published As

Publication number Publication date
DE3465228D1 (en) 1987-09-10
DE3344556A1 (de) 1985-06-20
EP0148367A1 (fr) 1985-07-17

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