EP1935065B1 - Kohlebürstenhalter für eine elektro-dynamische maschine - Google Patents

Kohlebürstenhalter für eine elektro-dynamische maschine Download PDF

Info

Publication number
EP1935065B1
EP1935065B1 EP06806966A EP06806966A EP1935065B1 EP 1935065 B1 EP1935065 B1 EP 1935065B1 EP 06806966 A EP06806966 A EP 06806966A EP 06806966 A EP06806966 A EP 06806966A EP 1935065 B1 EP1935065 B1 EP 1935065B1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
brush holder
part shell
housing
shell
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
EP06806966A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1935065A1 (de
Inventor
Stefan Adamek
Alfred Binder
Jaroslav Murnik
Günter Schardt
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1935065A1 publication Critical patent/EP1935065A1/de
Application granted granted Critical
Publication of EP1935065B1 publication Critical patent/EP1935065B1/de
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
    • H01R39/38—Brush holders
    • H01R39/388—Brush holders characterised by the material of the brush holder
    • 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
    • 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
    • H01R39/38—Brush holders
    • H01R39/40—Brush holders enabling brush movement within holder during current collection
    • 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
    • H01R39/38—Brush holders
    • H01R39/41—Brush holders cartridge type

Definitions

  • the invention relates to a carbon brush holder for an electro-dynamic machine, in particular an electric motor, with a quiver-shaped carbon brush guide arranged in a housing for supporting a sliding in a guide direction carbon brush, wherein the carbon brush guide has separate guide elements in the form of a first sub-shell and a second sub-shell which each extend along the guide direction.
  • Such a carbon brush holder is already off EP 1 117 160 B1 known.
  • a carbon brush guide made of metal which is composed of two identical half-shells, which extend along the wider surfaces of the carbon brush symmetrical to the plane of symmetry of the carbon brush.
  • such a carbon brush holder has the disadvantage that when using multi-layer carbon brushes precautions must be taken to avoid that cross flows flow through the metallic carbon brush guide between the separated by an insulating layer carbon bars of multilayer carbon brush.
  • the present invention has for its object to provide an improved, inexpensive carbon brush holder for an electro-dynamic machine available.
  • the first sub-shell made of electrically insulating material and the second sub-shell made of metal.
  • the metallic second partial shell has the advantage that it dissipates heat and thus overheating of the carbon brush is avoided.
  • the electrically insulating material of the first partial shell prevents leakage currents from flowing through the carbon brush guide in the case of a multilayer carbon brush between the carbon bars separated by an insulating layer.
  • a further advantage consists in that, in the case of a spring element acting on the carbon brush, which presses the carbon brush onto the commutator or the slip ring, and in the case of a plug connection part for electrical contacting of the carbon brush, electrical insulation can also be dispensed with in the case of multilayer carbon brushes.
  • the commutation is improved compared to previous carbon brushes, which increases the coal life.
  • the carbon length can be reduced for the same service life of the carbon brush.
  • the first sub-shell of particular heavy-duty plastic such as thermoset
  • thermoset a plastic with a low coefficient of expansion
  • Duroplast maintains its strength and shape even at high temperatures, so that even at high temperatures the carbon brush is guided exactly through the first part shell.
  • the first subshell is integrally formed on the housing of the carbon brush holder. This reduces the number of components and in addition eliminates an adjustment of the first sub-shell, whereby the carbon brush holder can be manufactured inexpensively. Particularly easy, the first part of the shell can be produced together with the housing by an injection molding process.
  • the second partial shell is preferably formed from a metal sheet, whereby it can be particularly easily, for example by punching and bending, can be produced.
  • the second partial shell has at least one latching element, by which it can be fixed in the housing.
  • a receptacle for holding the second partial shell is formed in the housing, so that the position of the second partial shell is fixed in the housing. In this way, inaccuracies in the positioning of the second Partial shell avoided in the housing of the carbon brush holder, whereby a precise guidance of the carbon brush can be ensured.
  • the housing has at least one opening which extends in the guide direction and which can be closed by a cover plate.
  • the opening which preferably extends over the entire length of the housing, the interior of the housing is particularly easily accessible, whereby the assembly of the various components of the carbon brush holder including the carbon brush particularly simplified.
  • the cover plate has at least one latching element, by which the cover plate can be latched to the housing, so that it is possible to dispense with a complicated screwing.
  • a receptacle for holding the second partial shell is formed on the cover plate, so that the second partial shell can be fixed in the housing by the cover plate. In this way, the position of the second subshell with respect to the housing and with respect to the cover plate can be specified exactly, whereby a further calibration is unnecessary.
  • positioning elements for positioning and / or on the housing fastening elements for attachment of the carbon brush holder are integrally formed on the cover plate on the electro-dynamic machine.
  • precise mounting on the electro-dynamic machine is particularly easy and possible with as few additional components.
  • the second subshell is arranged in the housing opposite the first subshell, wherein, in particular, the first subshell and the second subshell are designed to guide opposing side surfaces of the carbon brush.
  • the first sub-shell and / or the second sub-shell respectively surround at least one of the extending in the guide direction. Edges of the carbon brush. This results in that the carbon brush can be performed with very little clearance in the carbon brush guide. This reduces the wear of the carbon brush, and also the noise during operation of the electro-dynamic machine can be minimized.
  • the second partial shell extends along a monolayered surface of the multilayer carbon brush.
  • a short circuit of various carbon bars of the multilayer carbon brush is avoided by the metallic second partial shell.
  • the first sub-shell and the second sub-shell are identically shaped.
  • the carbon brush can be guided uniformly in both partial shells, whereby a uniform wear of the carbon brush can be ensured.
  • the carbon brush holder according to the invention is used in particular for electric motors for household appliances, such as drive motors for washing machines or dryers or blower motors for vacuum cleaners.
  • FIG. 1 is a cross section through a carbon brush holder 1 transverse to the guide direction F (see arrow in FIG FIG. 3 ).
  • Individual components of the carbon brush holder 1 according to FIG. 1 show the FIGS. 2a to 2d .
  • the carbon brush holder 1 has a housing 2 (see also FIG. 2a ), which is formed of plastic.
  • a quiver-shaped carbon brush guide 3 is arranged, in which a carbon brush 4 is guided.
  • the carbon brush 4 shown is a multilayer carbon brush which consists of a first carbon bar 5 and a second carbon bar 6 with an insulating layer 7 arranged therebetween.
  • the carbon brush guide 3 is formed by a first sub-shell 8 and a second sub-shell 9.
  • the first sub-shell 8 is integrally formed on the housing 2 and consists of electrically insulating plastic.
  • the second sub-shell 9 (see also FIG. 2b ) is formed of a metal sheet and inserted into the housing 2.
  • the first sub-shell 8 and the second sub-shell 9 are formed with two legs 10, 11 and 12, 13 and each one of the legs 10 and 11 and 12 and 13 connecting base 14 and15 identical U-shaped.
  • a spring belly 16 or 17 for receiving a helical spring 18 is respectively formed in the central region of the base 14 and 15.
  • the carbon brush 4 is pressed in the guide direction F on a commutator or slip ring of an electric motor (not shown), so that the carbon brush 4 can rest flat with its face 19 on the commutator or slip ring.
  • each of the planar guide regions 20, 21, 22 or 23 comprises, with the adjoining associated limb 10, 11, 12 or 13, one of the edges K of the carbon brush 4 extending in the guide direction F.
  • the carbon brush 4 lies with the outer surfaces of the first Kohleriegel 5 on the legs 10, 11 and the planar guide portions 20, 21 of the first sub-shell 8 and with the outer surfaces of the second coal bar 6 on the legs 12, 13 and the planar guide portions 22, 23 of the second sub-shell 9 at. In this way, the carbon brush 4 is guided with its first carbon bar 5 through the first sub-shell 8 and with its second carbon bar 6 through the second sub-shell 9, so that leakage currents between the two coal bars 5, 6 are excluded via the metallic second sub-shell 9.
  • the housing 2 has a receptacle 24 for the positive retention of the second sub-shell 9, in particular its leg 12.
  • the second sub-shell 9 is inserted during assembly through an opening 25 of the carbon brush holder 1 in the receptacle 24 and by means of a latching element 26 (see FIG. 2b ) locked to the housing 2.
  • the opening 25 of the housing 2 can by a cover plate 27 (see also Figure 2d ) are closed.
  • Preferably 27 locking elements 28, 29 are integrally formed on the cover plate, through which the cover plate 27 can be latched to the housing 2.
  • cover plate 27 On the inside of the cover plate 27 is also a receptacle 30 for the positive retention of the second sub-shell 9, in particular its leg 13 is formed, so that the second sub-shell 9 by closing the opening 25 with the cover plate 27, can be accurately positioned. Furthermore, 27 positioning pins 31, 32 are integrally formed on the cover plate, by which the carbon brush holder 1 on the electric motor (not shown) can be accurately positioned. For attachment of the carbon brush holder 1 to the electric motor 2 protrusions 33, 34 are integrally formed on opposite sides of the housing, each having a mounting hole 35, 36 for carrying a fastening screw or a fastening pin (not shown).
  • the housing 2 with the first sub-shell 8, as well as the cover plate 27 is made of thermoset, which is temperature-stable to at least 250 ° C, by injection molding.
  • the housing 2, as well as the cover plate 27 have in the region of the insulating layer 7 channel-shaped recesses 37, 38 to ensure that coal dust, resulting from abrasion of the carbon brush 4, does not accumulate between the coal seals 5 and 6 and thereby leakage currents between the Coalbars 5 and 6 can cause.
  • the carbon brush is electrically contacted by a plug connection part 39, which rests against the end of the coil spring 18 opposite the carbon brush 4.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
EP06806966A 2005-10-07 2006-10-04 Kohlebürstenhalter für eine elektro-dynamische maschine Not-in-force EP1935065B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005048191A DE102005048191A1 (de) 2005-10-07 2005-10-07 Kohlebürstenhalter für eine elektro-dynamische Maschine
PCT/EP2006/067031 WO2007042437A1 (de) 2005-10-07 2006-10-04 Kohlebürstenhalter für eine elektro-dynamische maschine

Publications (2)

Publication Number Publication Date
EP1935065A1 EP1935065A1 (de) 2008-06-25
EP1935065B1 true EP1935065B1 (de) 2009-02-11

Family

ID=37565702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06806966A Not-in-force EP1935065B1 (de) 2005-10-07 2006-10-04 Kohlebürstenhalter für eine elektro-dynamische maschine

Country Status (6)

Country Link
EP (1) EP1935065B1 (zh)
CN (1) CN101283489B (zh)
AT (1) ATE422721T1 (zh)
DE (2) DE102005048191A1 (zh)
ES (1) ES2320932T3 (zh)
WO (1) WO2007042437A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010041871B4 (de) * 2010-10-01 2017-04-13 Schunk Italia S.R.L. Kohlebürstenmodul
CN105226476A (zh) * 2014-06-25 2016-01-06 西安立科环保科技有限公司 一种新型整体碳刷架

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748324A (en) * 1954-05-07 1956-04-25 Arthur Abbey Improvements in or relating to brush-holders for electrical apparatus
US3983432A (en) * 1975-04-22 1976-09-28 Alexander Rankin Brush holder assembly
DE2831928A1 (de) * 1978-07-20 1980-03-20 Bosch Gmbh Robert Buerstenhalter fuer kleine kommutator-motoren, insbesondere fuer heimwerker-kombinationsmaschinen
CN2209840Y (zh) * 1995-01-14 1995-10-11 江鸿仁 一种电机碳刷座的导电铜座
CN2317559Y (zh) * 1998-04-21 1999-05-05 隆环企业有限公司 碳刷保持器
DE10002786A1 (de) * 2000-01-13 2001-08-16 Schunk Italia S R L Kohlehalteranordnung
CN2426238Y (zh) * 2000-06-19 2001-04-04 瑞安市瑞鑫电器有限公司 碳刷架
DE102004004275A1 (de) * 2004-01-28 2005-08-18 BSH Bosch und Siemens Hausgeräte GmbH Bürstenköcher für eine dynamo-elektrische Maschine

Also Published As

Publication number Publication date
ES2320932T3 (es) 2009-05-29
DE502006002849D1 (de) 2009-03-26
ATE422721T1 (de) 2009-02-15
WO2007042437A1 (de) 2007-04-19
DE102005048191A1 (de) 2007-04-19
CN101283489B (zh) 2010-09-29
EP1935065A1 (de) 2008-06-25
CN101283489A (zh) 2008-10-08

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