EP1444757B1 - Kohlebürste - Google Patents

Kohlebürste Download PDF

Info

Publication number
EP1444757B1
EP1444757B1 EP02781315A EP02781315A EP1444757B1 EP 1444757 B1 EP1444757 B1 EP 1444757B1 EP 02781315 A EP02781315 A EP 02781315A EP 02781315 A EP02781315 A EP 02781315A EP 1444757 B1 EP1444757 B1 EP 1444757B1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
spring
recess
disconnecting element
protective covering
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 - Lifetime
Application number
EP02781315A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1444757A1 (de
Inventor
Diethard Schunk Italia S.r.l. Schaut
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 EP1444757A1 publication Critical patent/EP1444757A1/de
Application granted granted Critical
Publication of EP1444757B1 publication Critical patent/EP1444757B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R39/59—Means structurally associated with the brushes for interrupting current

Definitions

  • the invention relates to a carbon brush with a arranged in a recess of this at least partially surrounded by a shutting Abschaltorgan comprising a spring preferably in carbon brush longitudinal direction biased from electrically insulating material existing pin as Abschaltnippel, wherein the sheath is fixed in the carbon brush, and optionally an electrically conductive strand.
  • shutdown devices are integrated in the carbon brushes.
  • the shutdown devices consist of a made of electrically insulating material pin or nipple, which is subjected to force by means of a helical compression spring in the direction of the tread of the carbon brush.
  • the helical compression spring can be supported on a separating plate, which is fixed in the carbon brush by means of stamping powder or by means of a transverse to the shut-off Isolierstifis.
  • the shut-off nipple is exposed, with the consequence that it is freely movable, that is, by supporting it on the commutator, the carbon brush lifts off from it.
  • a carbon brush with Abschaltnippel is z.
  • Abschaltorgan can be passed in the carbon brush current via a strand or a kraftbeier sodes in carbon brush direction of the commutator pressure element as pressure spring.
  • DE 74 04 456 U1 discloses a generic carbon brush with a shut-off. This includes a pressure piece that passes through a capsule. To avoid uncontrolled sliding out of the pressure piece, a constriction is provided in the capsule. For proper positioning of the Abschaltorgans the capsule must be introduced with the pressure piece in such a blind hole of the carbon brush that a present in the capsule spring on the pressure piece, which is supported on the carbon brush, is biased.
  • shut-off brush which has a screw-in the carbon brush sleeve in which a Abschaltnippel is arranged with these surrounding coil spring.
  • the shut-off nipple is constantly supported on the bottom wall of a blind hole, in which the sleeve is screwed.
  • the present invention is based on the problem, a carbon brush of the type mentioned in such a way that the Abschaltorgan is easily fixable in the carbon brush, the spring may have a desired bias, which is not to compensate during installation by separate tools. It should also be ensured that the forces caused by the spring do not exert any undue forces on the carbon brush when the shut-off device is fixed. Furthermore, a montagee Organic simplification when fixing the Abschaltorgans done in the carbon brush.
  • the problem is solved in that the shut-off member with pretensioned spring is surrounded on the pin-side by the sheath consisting of electrically insulating material in such a way that the sheath accommodates pretensioning of the spring.
  • a shrink film can also be used.
  • the shutdown member is supplied as a prefabricated component with biased spring element such as helical compression spring of the recess having carbon brush to be fixed in the former. It is not necessary to puncture the prefabricated component or fix its coil spring by means of a separating plate or a pin made of insulating material.
  • shut-off element is inserted and fixed in the recess as a prefabricated unit with preloaded spring with the sheathing surrounding it at least partially.
  • the envelope is perforated switching nipple side.
  • the envelope may also have a smaller material thickness than the spring side of the switching nipple side.
  • the unit switching nipple spring is used as a unit so that the spring is biased to the extent required relative to the nipple without a separate support of the spring in the carbon brush is required.
  • the nipple can enforce the enclosure with the result that the nipple is supported on the one hand on the commutator and on the other hand, the spring lifts the carbon brush from the commutator.
  • the invention is therefore also distinguished by a method for equipping a carbon brush with a shut-off element to be inserted in a recess comprising a pin, such as a shut-off nipple, which is prestressed by a spring and which is secured in the carbon brush Abschaltorgan with prestressed spring in the existing of electrically insulating material, the bias of the spring receiving sheath is arranged and introduced as a prefabricated part in the recess and fixed in this.
  • FIG. 1 a detail of a carbon brush 10 is shown, which is intended in particular for small machines such as power tools or garden pumps or home appliances or washing machine motors, ie for motors in general, in which a Mehrfachbestükkung should take place, but without thereby limiting the teaching of the invention ,
  • the teaching of the invention also applies to carbon brushes, in which the current is passed through a pressure spring, not shown, via which the carbon brush is subjected to force in the direction of a commutator to abut against this.
  • shut-off member 20 comprises an insulating pin made of electrically insulating material or equivalent element as Abschaltnippel 22, which is in the carbon brush 10 under the action of a highly biased spring 24 such as helical compression spring.
  • the unit thus formed is in the recess 18 by z. B. adhesive 28 fixed.
  • the bias of the spring 24 is received by the sheath 26, so that a load of the carbon brush 10 does not occur. Also, it is not necessary that the shut-off member 20 is pulped in the recess 18, as is the case in the prior art.
  • the enclosure 26 surrounds the shut-off member 20 with the Abschaltnippel 22 and the spring 24 such that the spring 24 is received in the prestressed state. It is not absolutely necessary that a sheath 26 completely surrounds the shut-off element 20.
  • the carbon brush 10 has reached its wear limit, the commutator-side region of the switching nipple 22 is exposed both by the carbon brush 10 and by the casing 26, so that the cut-off nipple 22 can be placed on the commutator.
  • the bias of the spring 24 may degrade, with the result that the carbon brush 10 is lifted from the commutator. A brush fire is thereby prevented, so that the commutator can not be roughened by brush fire or out of round.
  • the sheath 26 is made of electrically insulating material and may be formed as a kind of shrink film, in which the shut-off member 20 is arranged with the Abschaltnippel 22 and the biased spring 24.
  • the unit thus formed can be inserted into the recess 18 and mentioned z. B. be fixed by adhesive or other suitable measures.
  • shut-off member 22 is supplied in the prestressed state, there is a simplification of the assembly of carbon brushes, which are to be formedsabschallend.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
EP02781315A 2001-11-15 2002-11-13 Kohlebürste Expired - Lifetime EP1444757B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10155991 2001-11-15
DE10155991A DE10155991C2 (de) 2001-11-15 2001-11-15 Kohlebürste
PCT/EP2002/012688 WO2003043142A1 (de) 2001-11-15 2002-11-13 Kohlebürste

Publications (2)

Publication Number Publication Date
EP1444757A1 EP1444757A1 (de) 2004-08-11
EP1444757B1 true EP1444757B1 (de) 2006-02-01

Family

ID=7705764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02781315A Expired - Lifetime EP1444757B1 (de) 2001-11-15 2002-11-13 Kohlebürste

Country Status (5)

Country Link
EP (1) EP1444757B1 (zh)
CN (1) CN1586027A (zh)
AT (1) ATE317161T1 (zh)
DE (2) DE10155991C2 (zh)
WO (1) WO2003043142A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005063170B4 (de) * 2005-12-30 2011-12-08 Schunk Kohlenstofftechnik Gmbh Verfahren zum Bestücken einer Kohlebürste mit Abschalteinrichtung
DE102008012963A1 (de) * 2008-03-06 2009-09-17 Schunk Kohlenstofftechnik Gmbh Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit
DE102010042804A1 (de) 2010-10-22 2012-04-26 Robert Bosch Gmbh Kohlebürste mit Abschaltvorrichtung
CN103427284A (zh) * 2012-05-14 2013-12-04 海门市海菱碳业有限公司 电动抛光机用安全碳刷
CN103427275A (zh) * 2012-05-17 2013-12-04 海门市海菱碳业有限公司 汽车起动马达用保险碳刷
CN103427280A (zh) * 2012-05-18 2013-12-04 海门市海菱碳业有限公司 自停式角向磨光机用碳刷
CN103427301A (zh) * 2012-05-18 2013-12-04 海门市华联电碳有限公司 安全电锤用碳刷
CN102904146A (zh) * 2012-10-26 2013-01-30 海门市通达碳业有限公司 一种电刷组件的装配方法
DE102021107839A1 (de) * 2021-03-29 2022-09-29 Metabowerke Gmbh Schichtkohlebürste für einen Elektromotor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2227658B1 (zh) * 1973-04-26 1976-09-10 Lorraine Carbone
DE2804547A1 (de) * 1978-02-03 1979-08-09 Licentia Gmbh Kohlebuerste fuer kollektormotoren
DE3047421A1 (de) * 1980-12-17 1982-07-15 Ringsdorff-Werke GmbH, 5300 Bonn Abschaltbuerste
DE4111206A1 (de) * 1991-04-06 1992-10-08 Schunk Kohlenstofftechnik Gmbh Kohlebuerste

Also Published As

Publication number Publication date
DE10155991C2 (de) 2003-12-24
CN1586027A (zh) 2005-02-23
DE50205764D1 (de) 2006-04-13
DE10155991A1 (de) 2003-06-05
ATE317161T1 (de) 2006-02-15
EP1444757A1 (de) 2004-08-11
WO2003043142A1 (de) 2003-05-22

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