EP2856579B1 - Balai de charbon doté de poudre isolante compactée - Google Patents

Balai de charbon doté de poudre isolante compactée Download PDF

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Publication number
EP2856579B1
EP2856579B1 EP13730140.4A EP13730140A EP2856579B1 EP 2856579 B1 EP2856579 B1 EP 2856579B1 EP 13730140 A EP13730140 A EP 13730140A EP 2856579 B1 EP2856579 B1 EP 2856579B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
carbon brush
insulating
recess
individual wires
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.)
Not-in-force
Application number
EP13730140.4A
Other languages
German (de)
English (en)
Other versions
EP2856579A1 (fr
Inventor
Edmund Kübler
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.)
Schunk Wien GmbH
Original Assignee
Schunk Wien 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 Schunk Wien GmbH filed Critical Schunk Wien GmbH
Publication of EP2856579A1 publication Critical patent/EP2856579A1/fr
Application granted granted Critical
Publication of EP2856579B1 publication Critical patent/EP2856579B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/36—Connections of cable or wire to brush
    • 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
    • H01R39/58—Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear

Definitions

  • the invention relates to a carbon brush with a wear limit detection function, with a current-carrying strand arranged in a brush body and with a detent strand, which is arranged with a Litzenendabrough in a recess formed in the brush body.
  • the EP 0512 234 A2 proposes a secure positional fixation by the Meldelitze is performed with its sheathed portion through a metal sleeve open on both sides, squeezed with the sleeve and the sleeve is then glued in the recess of the carbon brush.
  • the stripped wire at its end can also be inserted into a cup-shaped sleeve of insulating material closed on one side and glued to the exposed individual wires at the bottom of the sleeve. Subsequently, this prefabricated arrangement is introduced into the receptacle of the carbon brush and fixed by means of an adhesive material.
  • the sleeve can be fixed in position by a pin arranged in a second recess or bore.
  • the message wire is tamped in a (Teflon) coated area with a metal powder, such as iron or copper powder or carbon in the recess of the carbon brush.
  • a metal powder such as iron or copper powder or carbon in the recess of the carbon brush.
  • the underlying object of the invention is to provide a connection technique for fixing the message cord in a carbon brush, which with little design effort, a mechanically robust attachment of the signaling cord connected to a reliable wear limit message guaranteed.
  • the basic idea of the present invention is thus based on the use of an insulating ramming powder, with the exposed individual wires of the message strand are tamped in a recess of the carbon brush.
  • the insulating ramming powder fulfills the task of fixing the message strand and the role of an insulating layer between the message cord and carbon brush body in a dual function.
  • the stripped Meldelitze in the recess is completely surrounded by the insulating ramming powder, in particular as a final insulation on the conductor cross-section at the bottom of the recess.
  • the ramming powder acts simultaneously as an insulating material, can be dispensed with an insulating sheathing of the message strand, for example made of Teflon.
  • this has the advantage that a recess with a small bore diameter can be provided for the message strand, which exhibits at least in the strand end section exposed in the recess, without sheathing. This in turn leads to a stability-promoting thicker residual wall thickness of the carbon brush body.
  • the exposed individual wires are at least partially enclosed by a sleeve with an insertion opening.
  • a sleeve with an insertion opening For carbon brushes with larger dimensions (cross-sectional area preferably greater than 10x8 mm 2 ) can be a more reliable mechanical connection can be achieved by the use of a sleeve in which the stripped Meldelitze is attached, for example by crimping. The Litzenendabêt with preassembled sleeve is then fixed in the recess with the insulating ramming powder.
  • the insulating ramming powder does not have to enclose the entire arrangement in the recess.
  • the tamping above the sleeve insertion since the exposed individual wires of the message strand within the sleeve, in particular at its end by the electrically non-conductive cup ground as the final insulation isolated.
  • the insulating ramming powder surrounds the sleeve and the individual wires exposed in the recess completely to ensure reliable insulation.
  • the sleeve is designed as a centering sleeve.
  • a sleeve designed as a centering sleeve has at its strand insertion opening a conical taper in the insertion direction, so that the strand during insertion can slide without resistance into the interior of the centering.
  • An eversion of individual stranded wires and thus the risk of unreliable connection are excluded in contrast to a sleeve with a flat end face at the insertion.
  • the centering sleeve is designed as a closed sleeve on one side.
  • This cup-shaped centering sleeve surrounds the Litzenendabrough as an electrically insulating socket within the carbon brush body - optionally in conjunction with an applied on the outer wall of the strand adhesive insulating layer - and prevents in normal operation electrical contact with the carbon brush.
  • An electrically conductive connection with the carbon brush body or the slip ring comes off only when due to the carbon brush wear and abrasion of the (cup) bottom is done.
  • the centering sleeve can be designed as a sleeve open on both sides.
  • the strand end portion protrudes with its exposed individual wires beyond the lower end of the sleeve and is enclosed by an additional insulating adhesive layer or the insulating ramming powder.
  • the exposed individual wires are pressed by crimping with the centering sleeve or glued into it.
  • These joining techniques are easy to perform production technology before inserting the assembly in the carbon brush body and ensure a sufficiently high-tensile strength connection.
  • the insulating ramming powder is a thermoset or it contains Duroplast fortunemaschinener. Due to its high thermo-mechanical strength, this plastic is preferably suitable as ramming powder material.
  • Fig. 1 shows a carbon brush 2 with a carbon brush body 4, which has a bore formed as a recess 6, in which a Litzenendabites 12 a Meldelitze 10 is introduced.
  • the carbon brush body 4 still another, not shown recess for receiving a current-carrying wire, via which the operating current is supplied and transmitted via a contact surface at the lower end of the carbon brush 2 on a slip ring.
  • the signaling strand 10 is not provided with an insulating sheath, so that a bundle 14 of individual wires 13 exposed, ie not enclosed by an insulating protective sheath, projects into the recess 6.
  • the necessary insulation layer with respect to the carbon brush body 4 forms the insulating ramming powder 15, with which the bundle 14 is fixed from the exposed individual wires 13 in the recess 6.
  • the insulating ramming powder 15 surrounds the exposed individual wires 13 completely, ie circumferentially along the bore wall and in particular at the end of the strand opposite the recess base. With progressive wear of the carbon brush body 4, the insulating ramming powder 15 is removed at the recess bottom from below, so that the strand end comes into contact with the slip ring and due to the electrical connection is an alarm.
  • Fig. 2 shows a carbon brush 2 with a carbon brush body 4, in the recess 6 a centering sleeve 8 is inserted.
  • the centering sleeve 8 is designed as a sleeve closed on one side of insulating material and receives the Litzenendabêt 12 of the uncoated Meldelitze 10.
  • the bundle 14 protrudes from exposed individual wires 13 into the interior of the centering sleeve 8 and is glued there with an adhesive layer 17.
  • the centering sleeve 8 thus forms a cup-shaped insulating socket for the bundle 14 from the uncovered individual wires 13.
  • the arrangement of detector cord 10 and centering sleeve 8 is fixed above the insertion opening of the centering sleeve 8 with the insulating ramming powder 15.
  • the contact surface of the carbon brush body 4 moves with the slip ring in the direction of the lower end of the centering 8, so that the tip of an insulating bottom 16 of the centering 8 is affected by the abrasion and at further wear the individual wires 13, 14 come into contact with the brush body 4 via the slip ring, whereby a warning signal is triggered.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Installation Of Indoor Wiring (AREA)

Claims (7)

  1. Balai de carbone (2) ayant une fonctionne d'indication de limite d'abrasion, ayant un toron conducteur disposé dans le corps de balai (4) et ayant un toron indicatif (10) qui est disposé dans un évidement (6) formé dans le corps de balai (4) avec une section d'extrémité de toron (12),
    caractérisé en ce que
    la section d'extrémité de toron (12) comprend des fils individuels exposés (14) le long de la profondeur de l'évidement (6), lesdits fils individuels exposés (14) étant enveloppés par une poudre tassant (15) isolante pour être fixés dans l'évidement.
  2. Balai de carbone selon la revendication 1,
    caractérisé en ce que
    les fils individuels exposés (14) sont enveloppés au moins en section par un manchon (8) ayant une ouverture d'introduction (22).
  3. Balai de carbone selon la revendication 1 ou 2,
    caractérisé en ce que
    le manchon (8) est formé comme un manchon à centrer (8).
  4. Balai de carbone selon la revendication 3
    caractérisé en ce que
    le manchon à centrer (8) est formé comme un manchon (8) fermé à un côté.
  5. Balai de carbone selon la revendication 3 ou 4,
    caractérisé en ce que
    le manchon à centrer (8) est formé comme un manchon (8) ouvert à deux côtés.
  6. Balai de carbone selon l'une quelconque des revendication 2 à 5,
    caractérisé en ce que
    les fils individuels exposés (14) sont sertis avec le manchon à centrer (8) par le sertissage ou est collé dans le manchon à center (8).
  7. Balai de carbone selon l'une quelconque des revendications 2 à 6,
    caractérisé en ce que
    la poudre tassant isolante est un matériau thermodurcissable ou comprend des parts d'un matériau thermodurcissable.
EP13730140.4A 2012-05-31 2013-05-31 Balai de charbon doté de poudre isolante compactée Not-in-force EP2856579B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012209216A DE102012209216A1 (de) 2012-05-31 2012-05-31 Kohlebürste mit isolierendem Stampfpulver
PCT/EP2013/061271 WO2013178791A1 (fr) 2012-05-31 2013-05-31 Balai de charbon doté de poudre isolante compactée

Publications (2)

Publication Number Publication Date
EP2856579A1 EP2856579A1 (fr) 2015-04-08
EP2856579B1 true EP2856579B1 (fr) 2017-03-01

Family

ID=48669874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13730140.4A Not-in-force EP2856579B1 (fr) 2012-05-31 2013-05-31 Balai de charbon doté de poudre isolante compactée

Country Status (4)

Country Link
EP (1) EP2856579B1 (fr)
DE (1) DE102012209216A1 (fr)
HU (1) HUE034351T2 (fr)
WO (1) WO2013178791A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536670A (en) * 1981-12-14 1985-08-20 Morganite Incorporated Electrical brushes with wear sensors
DE4111206A1 (de) 1991-04-06 1992-10-08 Schunk Kohlenstofftechnik Gmbh Kohlebuerste
DE4201701B4 (de) 1992-01-23 2007-04-26 Schunk Kohlenstofftechnik Gmbh Kohlebürste
DE9211524U1 (de) * 1992-01-23 1993-05-27 Schunk Kohlenstofftechnik GmbH, 6301 Heuchelheim Kohlebürste
DE59309829D1 (de) 1992-09-02 1999-11-11 Schunk Kohlenstofftechnik Gmbh Kohlebürste
DE4315622C2 (de) 1993-05-11 1997-01-16 Schunk Kohlenstofftechnik Gmbh Kohlebürste sowie Verfahren zum Anordnen und Befestigen einer Meldelitze in einer solchen
US7638918B2 (en) * 2004-06-14 2009-12-29 Carbone Lorraine Applications Electriques Carbon brush having a shunt wire in a carbon brush body
DE102008012963A1 (de) * 2008-03-06 2009-09-17 Schunk Kohlenstofftechnik Gmbh Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit
DE102010031415B4 (de) * 2010-07-15 2016-07-07 Schunk Kohlenstofftechnik Gmbh Kohlebürste

Also Published As

Publication number Publication date
WO2013178791A1 (fr) 2013-12-05
EP2856579A1 (fr) 2015-04-08
HUE034351T2 (hu) 2018-02-28
DE102012209216A1 (de) 2013-12-05

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