EP2198490B1 - Bürstenanordnung und elektrische maschine, insbesondere elektrisches hausgerät - Google Patents

Bürstenanordnung und elektrische maschine, insbesondere elektrisches hausgerät Download PDF

Info

Publication number
EP2198490B1
EP2198490B1 EP08804151.2A EP08804151A EP2198490B1 EP 2198490 B1 EP2198490 B1 EP 2198490B1 EP 08804151 A EP08804151 A EP 08804151A EP 2198490 B1 EP2198490 B1 EP 2198490B1
Authority
EP
European Patent Office
Prior art keywords
brush
arrangement according
sleeve
brush arrangement
brush sleeve
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
EP08804151.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2198490A1 (de
Inventor
Maria Büttner
Andreas Kirchner
Herbert Pecat
Thomas Tripp
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 EP2198490A1 publication Critical patent/EP2198490A1/de
Application granted granted Critical
Publication of EP2198490B1 publication Critical patent/EP2198490B1/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
    • H01R39/41—Brush holders cartridge type
    • 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
    • H01R39/385—Means for mechanical fixation of the brush holder

Definitions

  • the invention relates to a brush assembly on an electrical machine, in particular on an electrical domestic appliance, with a brush holder receiving the brush sleeve, which can be fixed in a position of use on the housing of the machine, and an electric machine equipped therewith.
  • a brush arrangement of the type mentioned is from the German patent application DE 197 17 594 A1 known.
  • the relevant machine has a pot-like housing made of an electrically conductive material, in which the commutator is rotatably mounted.
  • the housing holding means In the region of the end face of the housing holding means are formed, which serve to hold the carbon brushes receiving brush sleeves.
  • the carbon brushes are slidably mounted in the brush sleeves and biased by a helical compression spring in the direction of the commutator. Since the brush sleeves are also electrically conductive, they must each be rigidly attached to a support member made of an electrically insulating material, in particular made of plastic, are attached. Each support member is inserted during assembly from the outside radially inwardly in the direction of the commutator in the holding means until the brush sleeves occupy their position of use.
  • the contact spring of the stator comes into contact with the radial surface of the respective brush sleeve.
  • locking and stop means secure the support member and thus the associated brush sleeve in all directions.
  • a later replacement of support member and brush sleeve is basically by a mechanical lifting of the locking connection and a radially outward displacement possible.
  • an unintentional loosening of the latching connection may occur, especially if in a fault, the temperatures in the electrical machine unusually high and the material of the support member loses strength.
  • the object of the invention is to further improve the safety of such an electric machine even in the event of a fault.
  • a brush arrangement of the generic type in that the brush arrangement has catch means by means of which the brush sleeve can be locked in a securing position when leaving the use position.
  • the brush sleeve shifts beyond the securing position if it is released in the event of a fault. In this way, it can be ensured with the invention that the prescribed electrical safety distances are maintained even in the event of a fault, in particular with regard to the brushes and the brush sleeves.
  • the catching means comprise at least one latching device which engages the brush sleeve latching in the securing position.
  • a locking device can be implemented in a particularly simple and inexpensive way, the catch of the invention. This particularly ensures that Catching the brush sleeve against another directed away from the commutator displacement, especially in the direction of other electrically conductive components of the machine. This makes it possible to ensure that safety distances between the brush arrangement and other conductive components surrounding the brush arrangement are maintained even in the event of a fault.
  • This embodiment of the invention may be particularly advantageous when the brush sleeve is equipped for biasing the brush with a compression spring or other suitable means which favors in the case of a release of the brush sleeve displacing this away from the commutator.
  • the latching device in this case advantageously has at least one recess provided on the radial surface of the brush sleeve into which engages a latching lug in the position of use against the radial surface upon reaching the securing position and counteracts a further displacement by form-locking.
  • the invention can be realized in terms of manufacturing technology particularly simple and substantially weight and cost neutral with respect to the brush sleeve.
  • the recess can be formed, for example, circular or rectangular, in particular square. Such contours can be produced by drilling or, in particular, punching the recess without problems and within the framework of manufacturing steps which are required in any case, and by using tools and devices already used in the production process.
  • the invention is particularly applicable to a brush assembly in which the brush sleeve is formed electrically conductive and is therefore particularly secure against unwanted contact with other electrically conductive components.
  • the locking lug which is suitable for engagement in the recess when the securing position is reached is preferably formed by the contact spring of the stator, which has sufficient strength to secure the brush sleeve.
  • the formation of the catch in this case requires no additional or modified components with respect to the cited prior art with the exception of the adapted brush sleeve and is therefore also essentially cost and weight neutral.
  • in an exchange of the brush sleeves basically a retrofitting of existing electrical devices with catching means according to the invention, for example, in the context of an already due wear replacement, possible.
  • the recesses in the radial surface of the brush sleeves are preferably arranged in the position of use in the radial direction between the commutator and the stator of the electric machine and shift in an unwanted release in the direction of the contact springs.
  • the contact springs of the stator are in the position of use of the brush sleeve with advantage in the direction of the commutator inclined to the contact surface of the brush sleeve.
  • the relevant contact spring engages in the recess and is deformed in a further, radially acting away from the use position on the brush sleeve force in the direction of a blocking contour.
  • the invention can also be used with particular advantage in a brush arrangement in which the housing of the relevant machine is designed to be electrically conductive. Especially with such electrical devices, contact between the brush sleeve and the housing is reliably avoided.
  • the brush sleeve is preferably attached at a deratigen training on an electrically insulating support member, which in turn can be used in holding means provided on the housing, in particular insertable, is.
  • the support member is inserted in the course of assembly preferably in the direction of the commutator in the holding means of the housing, ie in the direction of a common mounting direction of the brush sleeve.
  • the specialist staff involved in the replacement of the brush sleeve thus does not need any of the usual in terms of assembly in this case Practice divergent teaching to be taught.
  • the catching means of the brush arrangement have a projecting from the brush sleeve projection which abuts in the securing position to a securing element, in particular to the contact spring.
  • a projection can be produced for example with little manufacturing effort by local plastic deformation of the sleeve wall and is also substantially both weight and cost neutral.
  • electric machine 1 has a pot-like housing 2, which receives on its end face 3 two similar brush assemblies 4.
  • the brush assemblies 4 are arranged in mirror image with respect to a plane intersecting the axis of rotation 5 of the rotor.
  • only a brush assembly 4 is shown in the drawing for simplicity and finds its correspondence on the opposite side of the housing 2, not shown.
  • the structural design of the brush assembly 4 is made FIG. 2 in detail visible.
  • the brush assembly 4 consists of a brush sleeve 6, in which a carbon brush 7 is arranged displaceably in the direction of the arrow A.
  • the carbon brush 7 is biased by a helical compression spring 8 in the direction of the commutator 9 connected to the rotor 5, wherein the carbon brush 7 applied end of the compression spring 8 is supported on the rear wall 10 of the brush sleeve 6.
  • this is displaced by the compression spring 8 in the direction of the commutator 9, whereby the abrasion is compensated until reaching a wear limit.
  • the brush sleeve 6 and the housing 2 are each made of a sheet-like, electrically conductive material, for example, brass or steel sheet. These materials have a high strength, but can be easily processed by pressing, stamping or drilling to form complex parts.
  • the brush sleeve 6 is undetachably connected via an angle-like projecting leg 11 and a form-fitting manner with a plate-like support member 12 which consists of an electrically non-conductive material and the brush sleeve 6 with respect to the housing 2 electrically insulated.
  • the support member 12 in turn is inserted during assembly together with the brush sleeve 6 in the direction of arrow B in the housing 2 integrally formed, tab-like holding means 13 until a protruding from the support member 12 stop 14 abuts the housing 2.
  • the holding means are in FIG. 1 also shown in supervision.
  • the contact spring 18 of the stator 19 is elastically resilient.
  • the contact spring 18 has a relative to the radial surface 17 in the direction of the commutator 9 inclined abutment region 20 which bears against the radial surface 17 under prestress.
  • the contact spring 18 is a component to be provided anyway on the electric machine, which in principle can be designed basically unchanged with regard to its shape compared with suitable previously known solutions. In this case, a non-inventively equipped at first installation electrical device can be subsequently provided, for example, in the context of a maintenance operation, with the present invention corresponding catch.
  • a circular recess 21 which in trouble-free operation of the electric machine 1 (as well as FIG. 5 apparent) is without function.
  • the recess 21 may also have a deviating from the circular contour, which, for example, of a preferred Manufacturing process for the brush sleeve 6 or the shape of the contact spring 18 is affected.
  • FIG. 7 consist of the catching means for securing the brush sleeve 6 in its securing position of a protruding from the radial surface 17 of the brush sleeve 6 away from the carbon brush 7 projection 22, which by its ramp-like mounting (arrow B) of the assembly of brush sleeve 6 and support member 12 only slightly impaired, whose displacement in the direction of arrow C, however, sets after reaching the securing position, a considerable resistance.
  • basically all components known from the prior art, with the exception of the brush sleeve 6, can be used unchanged, wherein the brush sleeve 6 itself can be produced within the scope of conventional production with the features required for carrying out the invention essentially without additional costs or weight increase is.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
EP08804151.2A 2007-10-05 2008-09-12 Bürstenanordnung und elektrische maschine, insbesondere elektrisches hausgerät Not-in-force EP2198490B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007047648A DE102007047648A1 (de) 2007-10-05 2007-10-05 Bürstenanordnung und elektrische Maschine, insbesondere elektrisches Hausgerät
PCT/EP2008/062189 WO2009047083A1 (de) 2007-10-05 2008-09-12 Bürstenanordnung und elektrische maschine, insbesondere elektrisches hausgerät

Publications (2)

Publication Number Publication Date
EP2198490A1 EP2198490A1 (de) 2010-06-23
EP2198490B1 true EP2198490B1 (de) 2013-05-01

Family

ID=39944427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08804151.2A Not-in-force EP2198490B1 (de) 2007-10-05 2008-09-12 Bürstenanordnung und elektrische maschine, insbesondere elektrisches hausgerät

Country Status (8)

Country Link
US (1) US20100207483A1 (ja)
EP (1) EP2198490B1 (ja)
JP (1) JP2010541174A (ja)
KR (1) KR20100076993A (ja)
CN (1) CN101816105B (ja)
DE (1) DE102007047648A1 (ja)
RU (1) RU2010114862A (ja)
WO (1) WO2009047083A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102594035B (zh) * 2011-01-07 2017-05-10 德昌电机(深圳)有限公司 电机
CN103633525A (zh) * 2013-11-18 2014-03-12 宝鸡航天华科机电工业有限公司 一种新型电刷
US9601967B2 (en) * 2014-05-02 2017-03-21 The Scott Fetzer Company Electric motor brush apparatus and method
CN205583897U (zh) * 2016-03-07 2016-09-14 德昌电机(深圳)有限公司 电刷装置、电机及液泵
CN106654784A (zh) * 2016-12-20 2017-05-10 湖南顶立科技有限公司 一种平面旋转电刷
CN116608896B (zh) * 2023-06-30 2023-09-19 常州华旋传感技术有限公司 电机一体式旋转变压器模拟设备及其模拟方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466481A (en) * 1965-01-30 1969-09-09 Ringsdorff Werke Gmbh Brush holder with gripping lever for electrical machines
US3656018A (en) * 1970-11-25 1972-04-11 Gen Electric Brush holder assembly
GB1438777A (en) * 1973-09-04 1976-06-09 Mullard Ltd Electromechanical propagation devices and the manufacture thereof
DE3227199A1 (de) * 1982-07-21 1984-01-26 Robert Bosch Gmbh, 7000 Stuttgart Elektromotor, insbesondere zum antreiben von hilfsaggregaten in kraftfahrzeugen
CN2098104U (zh) * 1991-06-17 1992-03-04 无锡县深硕电器厂 供电滑触导管
DE19717594B4 (de) 1997-04-25 2017-09-07 BSH Hausgeräte GmbH Bürstenanordnung an einer elektrischen Maschine
JPH11234968A (ja) * 1998-02-12 1999-08-27 Asmo Co Ltd ブラシ保持装置
JP2003224946A (ja) * 2002-01-29 2003-08-08 Sanyo Electric Co Ltd 整流子回転機
GB0328386D0 (en) * 2003-12-06 2004-01-14 Johnson Electric Sa Brush holder assembly for an electric motor
US7049727B2 (en) * 2004-01-16 2006-05-23 Robert Bosch Gmbh Integrated brush-holder retention system

Also Published As

Publication number Publication date
RU2010114862A (ru) 2011-11-10
US20100207483A1 (en) 2010-08-19
WO2009047083A1 (de) 2009-04-16
EP2198490A1 (de) 2010-06-23
DE102007047648A1 (de) 2009-04-09
CN101816105A (zh) 2010-08-25
KR20100076993A (ko) 2010-07-06
JP2010541174A (ja) 2010-12-24
CN101816105B (zh) 2013-01-23

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