EP2856580B1 - Balai de carbone avec douille de centrage - Google Patents

Balai de carbone avec douille de centrage Download PDF

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Publication number
EP2856580B1
EP2856580B1 EP13730139.6A EP13730139A EP2856580B1 EP 2856580 B1 EP2856580 B1 EP 2856580B1 EP 13730139 A EP13730139 A EP 13730139A EP 2856580 B1 EP2856580 B1 EP 2856580B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
centering sleeve
carbon brush
centering
stranded
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
EP13730139.6A
Other languages
German (de)
English (en)
Other versions
EP2856580A1 (fr
Inventor
Klaus-Georg Tontsch
Reiner Pfeiffer
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 Kohlenstofftechnik GmbH
Original Assignee
Schunk Kohlenstofftechnik 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 Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP2856580A1 publication Critical patent/EP2856580A1/fr
Application granted granted Critical
Publication of EP2856580B1 publication Critical patent/EP2856580B1/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
    • H01R39/58—Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear
    • 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
    • H01R39/59—Means structurally associated with the brushes for interrupting current

Definitions

  • the invention relates to a carbon brush with a wear limit reporting function, with a current-carrying strand arranged in a brush body and with a message strand which is surrounded and fixed at a conductor end portion of a sleeve having an insertion opening, wherein the sleeve is arranged in a recess formed in the brush body.
  • the message function fulfilled by the message cord can be supplemented by a shutdown function which forcibly stops the operating power supply via the (operating) current-carrying Litze entailed.
  • This shutdown function can be designed as a mechanical shutdown device.
  • a shutdown device is known, which is designed as a composite of several components assembly in the brush body.
  • the switch-off device has an electrically insulating Abschaltnippel, which is received under spring preload in a receiving bore.
  • a compression spring connected to the shut-off nipple is supported on a compacted filling compound filled into the receiving bore, which as a rule consists of a metal powder.
  • One way to circumvent the complex design of a mechanical shutdown function is to form the message splice such that it also fulfills the shutdown function in an electrical manner in addition to the reporting function.
  • the Meldelitze is designed as a contact conductor for the shutdown function for controlling an electrical shutdown device.
  • both the recess for the Meldelitze and for the operating current-carrying strand are designed as possible uniformly dimensioned recordings.
  • the object underlying the invention is to design the connection of a strand, in particular the message strand, with the carbon brush such that the strand can be securely fixed in the carbon brush body with a few simple manufacturing steps.
  • the sleeve is designed as such a centering sleeve whose inner diameter at the insertion an outer diameter corresponds and has a conical taper in the insertion direction.
  • the conical taper of the inner diameter is limited to a section adjacent to the insertion opening, the centering sleeve subsequently having a section of constant inner diameter.
  • the conical taper can basically extend over the entire length of the sleeve, so the sleeve in its entirety represent an inner cone whose inner diameter is constantly reduced at a constant outer diameter of the Ein Industriesrand with any thin wall thickness to the opposite end.
  • the conical course in the longitudinal direction of the centering sleeve is limited to a section adjacent to the insertion opening, to which a region is constant Inside diameter connects. This embodiment is easy to implement in terms of manufacturing technology and gives the sleeve a sufficient stability.
  • the limited in its length to the region of the insertion cone-shaped portion is advantageously formed so that the cone angle of the centering corresponds to a point angle of a center drill.
  • This configuration allows the shaping of the sleeve interior in production technology simple way through a hole with a center drill.
  • a preferred cone angle of 30 ° ensures obstacle-free insertion of the strand bundle.
  • the centering sleeve is designed as a closed sleeve on one side.
  • This cup-shaped centering sleeve surrounds the Litzenendabrough as electrically insulating socket within the carbon brush body - optionally in conjunction with an applied on the outer wall of the strand insulating adhesive layer - and prevents in normal operation electrical contact with the carbon brush.
  • An electrically conductive connection with the carbon brush body or the commutator 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 beyond the lower sleeve end and may be enclosed by an insulating adhesive layer.
  • the Meldelitze is crimped 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 centering sleeve is glued into the recess of the brush body.
  • the bonding of the centering can be done with an insulating adhesive material.
  • the centering sleeve is made of electrically non-conductive material.
  • the material may be, for example, an insulating plastic. This ensures that, as long as the wear limit has not yet been reached, the message cord has no electrical contact with the carbon brush body or the slip ring.
  • the centering sleeve may be made of metal, wherein an electrically non-conductive adhesive material is used as an insulating sheath when gluing the centering in the recess of the brush body and the centering sleeve is designed as a sleeve open on both sides. Due to its elasticity, a metallic sleeve allows both easy squeezing of the message strand and easy fitting of the sleeve into the recess of the carbon brush body. In addition, the metal can be reliably bonded. In the case of a metallic centering sleeve, this is open at the bottom so as not to damage the commutator.
  • the message strand and the centering sleeve are fixed by tamping with a ramming powder in the recess. If the drilling depth of the recess is greater than the sleeve length, then the sleeve can be fixed with the melding rope fastened in it by tamping a sheathed section of the message rope above the sleeve insertion opening with a ramming powder.
  • the ramming powder may in this case be a metallic ramming powder.
  • the strand end section can have exposed individual wires within the recess which are surrounded by an insulating stamping powder for fixing the message strand and the centering sleeve.
  • an insulating stamping powder for fixing the message strand and the centering sleeve.
  • the centering sleeve is used as a sleeve made of conductive material for the connection of the current-carrying stranded wire with the brush body (4).
  • the use of a sleeve in the embodiment as a centering sleeve is not limited to mounting a Meldelitze, but can also be used advantageously in the form of a metallic sleeve for producing a mechanical and electrical connection of the current-carrying stranded wire.
  • Fig. 1a shows a carbon brush 2 with a carbon brush body 4, which has a recess 6.
  • the recess 6 is preferably formed as a bore into which a centering sleeve 8 according to the invention is inserted.
  • the centering sleeve 8 receives a message cord 10.
  • a Litzenendabêt 12 of the Meldelitze 10 is connected to the centering sleeve 8, preferably by crimping with the centering sleeve 8 pressed or glued to this.
  • the carbon brush body 4 still another, not shown recess for receiving a live 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 centering sleeve 8 itself is glued into the recess 6 with preferably insulating adhesive material and forms a cup-shaped insulating socket for the Litzenendabexcellent 12 of the Meldelitze 10, wherein at the end of the Litzenendabitess 12 exposed by stripping single wires 13, 14 bundle-like in the interior 20 (FIGS. Fig. 2 ) of the centering sleeve 8 protrude.
  • 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.
  • Fig. 1b shows a further embodiment, which differs from the embodiment in Fig. 1a only differs in that the signal wire 10 is not stripped in their Litzenendabites 12, but has an insulating sheathing or encapsulation.
  • Fig. 2 shows a centering sleeve 8 according to the invention in detail.
  • the - not shown to scale - centering 8 is made of electrically non-conductive material and has the shape of a cylindrical body 18 with a cavity or interior 20 which is bounded at the lower end by the tapered bottom 16 and at the upper end an insertion 22nd for the reporting cord 10 has.
  • This cup-shaped configuration provides an insulated socket for the strand end section 12 of the message strand 10 within the carbon brush body 4.
  • the cylindrical base body 18 has a constant shape Outer diameter 24 and an inner diameter 26a, which corresponds to the insertion opening 22 almost the outer diameter 24, so that there the wall thickness and thus the end face goes to zero.
  • the introduction of the message cord 10 is considerably simplified.
  • the bundle 14 of individual wires 13, 14 initially slides in the bore 6 in the carbon brush body 4 along and then, without experiencing the resistance of a stepped shoulder, in the interior 20 of the centering sleeve 8 to the bottom before.
  • Adjoining the insertion opening 22 is an inner cone 30 that tapers in the direction of the sleeve bottom 16, which leads the individual wires 14 and, in the further course, merges into a section 32 of constant inner diameter 26b.
  • the centering sleeve 8 according to the invention can be used in an advantageous manner completely in a bore 6 of the carbon brush body 4.
  • the cavity 20 is formed in manufacturing technology simple manner by drilling with a center drill, so that for the cone angle ⁇ results in a value that can be selected according to the apex angle of the center drill.
  • a cone angle ⁇ of 30 ° has proven to be favorable to be able to insert the strand end portion 12 without having to fear the risk of everting the individual wires 13, 14.
  • other cone angles ⁇ are also possible - even conical angles ⁇ independent of a drill geometry, as long as a problem-free insertion of the strand end section 12 succeeds and the advantage of forming the cone by means of the center drill is dispensed with.
  • the centering sleeve 8 can also be designed as a sleeve open on both sides without bottom 16, if it is ensured that the exposed individual wires 13, 14 do not come into contact with the brush body 4. This can for example by a fixation the centering sleeve 8 previously introduced into the recess 6 electrically non-conductive adhesive material can be achieved, which completely lines the recess 6 in an insulating manner.
  • the centering sleeve 8 may consist of conductive material, wherein an electrically non-conductive adhesive material is used as an insulating sheath when gluing the centering sleeve 8 in the recess 6 of the brush body 4.
  • an electrically non-conductive adhesive material is used as an insulating sheath when gluing the centering sleeve 8 in the recess 6 of the brush body 4.
  • the insulating effect of a centering sleeve 8 made of insulating (plastic) material is replaced by the adhesive layer.
  • the centering sleeve 8 can also be used as a sleeve made of conductive material for the connection of a current-carrying stranded wire with the brush body 4. Also in this arrangement for fixing the current-carrying strand, the conical configuration 30 at the insertion opening 22 causes a simplified insertion of the current-carrying stranded wire.
  • the centering sleeve 8 may also be designed as a sleeve open on both sides, since an enveloping insulation within the brush body 4 is not required - on the contrary even must be avoided.
  • Fig. 3 shows a carbon brush 2 with a carbon brush body 4, in the recess 6 which is arranged in the centering sleeve 8 according to the invention
  • Meldelitze 10 is tamped.
  • the centering sleeve 8 is as in Fig. 1a formed as a one-sided closed sleeve made of insulating material and takes up the strand end portion 12 of an unimasked in this embodiment Meldelitze 10.
  • the bundle 14 protrudes from exposed individual wires 13, 14 into the interior of the centering sleeve 8 and is glued there with an adhesive layer 17.
  • crimping or compression is possible.
  • the arrangement of Meldelitze 10 and centering 8 is fixed above the insertion of the centering 8 with an insulating ramming powder 15.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Brushes (AREA)

Claims (11)

  1. Balai de carbone (2) ayant une fonctionne d'indication de limite d'abrasion, ayant un toron conducteur disposé dans un corps de balai (4) et ayant un toron indicatif (10) qui à une section d'extrémité de toron (12) est enveloppé et fixé par un manchon (8) ayant une ouverture d'introduction (22), ledit manchon (8) comprenant un diamètre intérieur (26a, 26b) et un diamètre extérieur (24) constant et étant disposé complètement dans un évidement (6) formé dans le corps de balai (4), ledit manchon (8) étant formé comme un manchon à centrer (8),
    caractérisé en ce que
    le diamètre intérieur du manchon à centrer correspond au diamètre extérieur (24) à l'évidement d'introduction (22) et comprend un rétrécissement (30) conique dans la direction d'introduction, ledit rétrécissement (30) conique du diamètre intérieur (26a, 26b) se limite à une section adjacente à l'ouverture d'introduction (22) et le manchon à centrer (8) comprenant une section (32) du diamètre intérieur (26b) constant adjacente à celle-ci.
  2. Balai de carbone selon la revendication 1,
    caractérisé en ce qu'
    un angle de cône (α) de manchon à centrer (8) correspond à un angle de pointe d'un foret à centrer.
  3. Balai de carbone selon la revendication 1 ou 2,
    caractérisé en ce que
    le manchon à centrer (8) est formé comme un manchon (8) fermé à un côté.
  4. Balai de carbone selon la revendication 1 ou 2,
    caractérisé en ce que
    le manchon à centrer (8) est formé comme un manchon (8) ouvert à deux côtés.
  5. Balai de carbone selon l'une quelconque des revendication 1 à 4,
    caractérisé en ce que
    le toron d'indication (10) est serti avec le manchon à centrer (8) par le sertissage ou est collé dans le manchon à center (8).
  6. Balai de carbone selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    le manchon à centrer (8) est collé dans l'évidement du corps de balai (4).
  7. Balai de carbone selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    le manchon à centrer (8) est produit en matériau non-conducteur électriquement.
  8. Balai de carbone selon la revendication 6,
    caractérisé en ce que
    le manchon à centrer (8) consiste au métal, un matériau adhésif non-conducteur électriquement étant utilisé comme une enveloppe isolante quand le manchon à centrer (8) est collé dans l'évidement (6) du corps de balai (4) et le manchon à centrer (8) étant formé comme un manchon ouvert au deux côtés.
  9. Balai de carbone selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    le toron d'indication (10) et le manchon à centrer (8) sont fixés dans l'évidement (6) par être tassés avec une poudre tassant (15).
  10. Balai de carbone selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    la section d'extrémité de toron (12) comprend des fils individuels (14) exposés dans l'évidement (6), lesdits fils individuels (6) étant enveloppés par une poudre tassant (15) isolant pour fixer le toron d'indication (10) et le manchon à centrer (8).
  11. Balai de carbone selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que
    le manchon à centrer (8) est utilisé comme un manchon (8) produit en matériau conducteur pour la connexion du toron conducteur au corps de balai (4).
EP13730139.6A 2012-05-31 2013-05-31 Balai de carbone avec douille de centrage Not-in-force EP2856580B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210209222 DE102012209222A1 (de) 2012-05-31 2012-05-31 Kohlebürste mit Zentrierhülse
PCT/EP2013/061269 WO2013178790A1 (fr) 2012-05-31 2013-05-31 Balai de carbone avec douille de centrage

Publications (2)

Publication Number Publication Date
EP2856580A1 EP2856580A1 (fr) 2015-04-08
EP2856580B1 true EP2856580B1 (fr) 2017-03-01

Family

ID=48669873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13730139.6A Not-in-force EP2856580B1 (fr) 2012-05-31 2013-05-31 Balai de carbone avec douille de centrage

Country Status (7)

Country Link
US (1) US9728925B2 (fr)
EP (1) EP2856580B1 (fr)
JP (1) JP6058791B2 (fr)
CN (1) CN104380541B (fr)
DE (1) DE102012209222A1 (fr)
HU (1) HUE032115T2 (fr)
WO (1) WO2013178790A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109149308B (zh) * 2018-07-20 2020-05-05 博深股份有限公司 一种带指示更换装置的电机用碳刷
CN109616850B (zh) * 2018-12-03 2020-02-28 大同新成新材料股份有限公司 一种石墨碳刷防过压用单模冲模具及其方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1425632A (en) * 1920-10-29 1922-08-15 Westinghouse Electric & Mfg Co Commutator brush
US2935632A (en) * 1956-02-08 1960-05-03 Jr Michael F Schmitz Shunt for carbon brush
GB999167A (en) * 1964-04-02 1965-07-21 Morganite Carbon Ltd Improvements in and relating to carbon brushes for electric generators and the like
FR1412458A (fr) 1964-07-23 1965-10-01 Morganite Carbon Ltd Balai pour dispositif électrique
JPS4916703U (fr) 1972-05-16 1974-02-13
JPS5037801U (fr) 1973-08-03 1975-04-19
US4344072A (en) * 1979-12-10 1982-08-10 Harper Jr Harold L Worn brush indicator
US4333095A (en) * 1980-02-19 1982-06-01 Reliance Electric Company Brush wear indicator
JPS5717268U (fr) 1980-06-25 1982-01-28
US4636778A (en) * 1983-10-03 1987-01-13 Reliance Electric Company Brush wear monitor
JPH0634362B2 (ja) 1985-01-28 1994-05-02 株式会社日立製作所 超電導線の接合方法
DE4111206A1 (de) 1991-04-06 1992-10-08 Schunk Kohlenstofftechnik Gmbh Kohlebuerste
EP0585591B1 (fr) 1992-09-02 1997-03-05 Schunk Kohlenstofftechnik GmbH Balai en charbon
DE4315622C2 (de) * 1993-05-11 1997-01-16 Schunk Kohlenstofftechnik Gmbh Kohlebürste sowie Verfahren zum Anordnen und Befestigen einer Meldelitze in einer solchen
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
DE102012209222A1 (de) 2013-12-05
CN104380541A (zh) 2015-02-25
JP6058791B2 (ja) 2017-01-11
US20150111397A1 (en) 2015-04-23
JP2015524243A (ja) 2015-08-20
US9728925B2 (en) 2017-08-08
CN104380541B (zh) 2017-06-13
WO2013178790A1 (fr) 2013-12-05
HUE032115T2 (en) 2017-08-28
EP2856580A1 (fr) 2015-04-08

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