EP0455253B1 - Bürstenhalter - Google Patents

Bürstenhalter Download PDF

Info

Publication number
EP0455253B1
EP0455253B1 EP91107183A EP91107183A EP0455253B1 EP 0455253 B1 EP0455253 B1 EP 0455253B1 EP 91107183 A EP91107183 A EP 91107183A EP 91107183 A EP91107183 A EP 91107183A EP 0455253 B1 EP0455253 B1 EP 0455253B1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
shaft
brush
arrangement according
inclination
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
EP91107183A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0455253A3 (en
EP0455253A2 (de
Inventor
Winfried Kipke
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 Bahn und Industrietechnik GmbH Germany
Original Assignee
Schunk Bahn und Industrietechnik GmbH Germany
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 Bahn und Industrietechnik GmbH Germany filed Critical Schunk Bahn und Industrietechnik GmbH Germany
Publication of EP0455253A2 publication Critical patent/EP0455253A2/de
Publication of EP0455253A3 publication Critical patent/EP0455253A3/de
Application granted granted Critical
Publication of EP0455253B1 publication Critical patent/EP0455253B1/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
    • H01R39/38—Brush holders
    • H01R39/381—Brush holders characterised by the application of pressure to brush

Definitions

  • the invention relates to a brush holder with a carbon brush which can be displaced in a carbon brush shaft, a pressure lever which initiates a force on the carbon brush in the direction of its displacement and a spring element which on the one hand starts from the pressure lever and on the other hand from a fastening point, the carbon brush resting against at least a carbon brush shaft wall transverse forces on the carbon brush in the area of the foot can be introduced through an element on the carbon brush shaft wall opposite side surface of the carbon brush, permanently applied to the side element.
  • carbon brushes sit in a carbon brush shaft with play. This is particularly disadvantageous if the carbon brushes are associated with motors in which the direction of rotation is reversed, e.g. with washing machine motors or traction motors, so there is a reversing operation. Through the reversing process, the brush base moves according to the holder play. This shifting is often associated with a tipping process.
  • a roller band spring acts on a slope of the brush head and, in addition to the contact pressure, conveys a further force component which acts against the opposite shaft surface.
  • the second pressure point is determined by the bracket of the roll belt spring. Due to the design, the lateral forces decrease in the course of wear.
  • a roller band spring is rigidly attached to a carbon brush in order to cause both transverse forces to bear the carbon brush against a shaft wall and forces in the direction of the commutator.
  • a corresponding construction is clearly disadvantageous, since an exchange of the carbon brush also causes an exchange of the spring. A solution in this regard is therefore negligible solely from a cost perspective.
  • a further disadvantage is that the brush tilts in the guide and thus only absorbs the transverse forces in the contact line.
  • a roller spring known from DE-A-33 46 595 exerts both pressure on the carbon brush in the direction of the commutator and transverse forces.
  • the point of application is quite high in relation to the transverse forces, so that there is an unfavorable moment.
  • DE-B-1 488 671 describes a brush holder in which a pivotable lever mounted on a pressure lever is provided for introducing transverse forces into a carbon brush. Separate coil springs each act on the swivel lever and the pressure lever in order to introduce the desired forces into the carbon brush.
  • a movable pivot lever for a carbon brush assembly is known from US-A-2,532,827. According to one embodiment, this starts from a separate shaft.
  • a coil spring acts on the swivel lever and acts on a pressure lever at the same time.
  • the helical spring itself surrounds a further shaft starting from a mounting plate of the brush holder.
  • the present invention is based on the problem of developing a brush holder of the type described at the outset in such a way that it is ensured with structurally simple measures that displacement or tilting of the carbon brush is ruled out, in particular in the case of a reversing operation, it being intended to ensure that the transverse forces are introduced in the area of the carbon brush base. It should also be possible to improve the heat dissipation from the carbon brush.
  • the element is displaceable along a slope running in the area of an opening of the carbon brush shaft and is directly or indirectly the further attachment point of the spring element.
  • the spring element ensures, on the one hand, that the element, which is preferably designed as a rotatable rolling element, strives to be moved along the slope towards the carbon brush, that is to say in the region of the smallest distance between the slope and the carbon brush. This ensures that the element always acts on the carbon brush to such an extent that it abuts the corresponding coal shaft wall on the surface opposite the contact surface. This in turn means that shifting the foot area of the carbon brush is impossible. As a result, even with a large amount of play between the carbon brush and the carbon brush shaft, it is ensured that there is no tilting.
  • the force acting in the direction of the commutator or the slip ring is introduced into the carbon brush via the spring element.
  • This construction clearly ensures that the direction of the transverse force is introduced into the carbon brush regardless of the position of the element which acts directly on the carbon brush head surface, that is to say the pressure finger position or the corresponding roller band section.
  • the resulting lateral force remains largely constant.
  • the transverse forces can be increased in that the pressure finger rests on a beveled brush head surface, however, as is already known from the prior art.
  • At least the interacting surfaces can be designed to be electrically insulated from the further element, such as the roller element and the carbon brush, as a result of which an uncontrolled flow of current is excluded.
  • the further element can preferably consist of an electrically insulating material or be coated with such.
  • the additional element in particular in the form of the roller element which can be rotated about an axis running parallel to the incline, reduces the friction between the carbon brush and the element which causes the transverse forces. A reduction in friction can also be achieved in that the sliding surfaces are designed to reduce friction.
  • a brush holder 10 is shown with a structure which is known per se, whereby features designed according to the invention ensure that 12 transverse forces F act on a carbon brush, so that in particular in the case of a reversing operation a shifting or tilting of the carbon brush 12 is excluded.
  • the brush holder 10 has a carbon brush shaft 14 which is intended for the carbon brush 12 and is penetrated by the carbon brush 12 so that it can interact with a commutator (not shown) or with slip rings of an electrical machine for transmitting the current.
  • a pressure lever 16 is provided in the exemplary embodiment, the finger 18 of which acts on the head surface 20 of the carbon brush 12.
  • the head surface 20 is chamfered so that a transverse force can be generated in the direction of the arrow F.
  • the pressure lever 16 has bearing pins 22 which can be inserted into receptacles 24 of legs 26 and 28 in order to be able to pivot the pressure lever 16 to the desired extent.
  • a tension spring such as a helical spring 30, emanates from the pressure lever 16 and starts from a fastening 32, which in turn extends indirectly from the legs 26 and 28 of the carbon brush holder 10.
  • the transverse forces F are intended to cause the carbon brush 12 to bear flat against the inner surface of the wall 34 of the carbon brush shaft 14.
  • a rolling element 40 which can be displaced along an incline 38 acts on the carbon brush 12 to produce the transverse force in the foot region 36 of the carbon brush 12.
  • the bevel 38 is formed by sections of the legs 26 and 28.
  • a peg or a shaft 42 which is surrounded by sections of the element 40, runs along these inclined leg sections, that is to say the bevel 38, as is particularly illustrated in the illustration in FIG. 3.
  • the fastening 32 for the helical spring 30 runs between the sections of the element 40 designed as a cylinder. In other words, the fastening 32 extends from the shaft 42.
  • the shaft 42 and thus the roller element 40 endeavors to be displaced along the bevel 38 in the direction of the carbon brush 12, so that in turn the lateral force F in the foot region 36 of the carbon brush 12 is introduced in such a way that the carbon brush 12 is flat on the surface Carbon brush shaft wall 34 abuts.
  • the bevel 38 runs in the region of a recess 44, which lies opposite the wall of the carbon brush shaft on which the carbon brush 12 bears due to the transverse forces F.
  • bevel 38 or the leg sections at the free end 46 has a section running parallel to the shaft walls, which ensures that the shaft 42 cannot slide off the bevel 38 in an uncontrolled manner.
  • At least the areas of the rolling element 40 interacting with the carbon brush 12 can be formed from an electrically insulating material.
  • the helical spring element 30 performs a dual function, namely on the one hand to pivot the pressure lever 16 and thus the pressure finger 18 to the carbon brush 12 and on the other hand to move the element 40 along the bevel 38 until a firm contact with the surface opposite the wall 34 the carbon brush 12 takes place.
  • the transverse forces shown in FIG. 1 marked with the symbol F are introduced into the carbon brush 12, so that movement or tilting within the carbon brush shaft 14 is excluded.
  • the direction of the transverse forces F in the area of the foot 36 of the carbon brush 12 is independent of the position of the pressure finger and thus the wear of the carbon brush 12.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
EP91107183A 1990-05-04 1991-05-03 Bürstenhalter Expired - Lifetime EP0455253B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4014300A DE4014300A1 (de) 1990-05-04 1990-05-04 Einrichtung zur uebertragung von stroemen
DE4014300 1990-05-04

Publications (3)

Publication Number Publication Date
EP0455253A2 EP0455253A2 (de) 1991-11-06
EP0455253A3 EP0455253A3 (en) 1992-07-29
EP0455253B1 true EP0455253B1 (de) 1995-03-15

Family

ID=6405691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107183A Expired - Lifetime EP0455253B1 (de) 1990-05-04 1991-05-03 Bürstenhalter

Country Status (3)

Country Link
EP (1) EP0455253B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE4014300A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2071855T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021072523A1 (pt) * 2019-10-18 2021-04-22 Mersen Do Brasil Ltda. Porta escovas para motores elétricos de tração para locomotivas

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3351698B2 (ja) * 1996-12-27 2002-12-03 株式会社ミツバ ブラシホルダ装置
DE19725082A1 (de) * 1997-06-13 1999-01-07 Itt Mfg Enterprises Inc Kohlebürste für eine elektrische Maschine
RU2150772C1 (ru) * 1999-01-25 2000-06-10 Смазнов Петр Петрович Щетка для электрической машины
DE102011085997A1 (de) 2011-11-09 2013-05-16 Robert Bosch Gmbh Schwingungsreduzierter Bürstenhalter für einen Elektromotor
DE102020114457A1 (de) * 2020-05-29 2021-12-02 Audi Aktiengesellschaft Elektromaschine, insbesondere fremderregte Synchronmaschine
CN114123674B (zh) * 2021-11-30 2023-12-01 江苏汇博机器人技术股份有限公司 一种电气自动化设备检修防护装置
CN114792918B (zh) * 2022-03-31 2023-05-23 华能伊敏煤电有限责任公司 一种接触稳定的高低压环用电刷
CN115663550B (zh) * 2022-09-07 2023-12-08 中国科学院电工研究所 一种压力可调的碳刷压紧机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532827A (en) * 1949-12-03 1950-12-05 Gen Electric Brush rigging
DE1488671B2 (de) * 1965-05-11 1970-11-05 Le Carbone-Lorraine S.A., Paris Bürstenhalter für Kollektoren von elektrischen Maschinen
GB1269403A (en) * 1968-06-21 1972-04-06 Gen Electric Improvements in brush holding arrangements in dynamoelectric machines
FR2217828B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-02-08 1978-08-04 Ferraz & Cie Lucien
DE3346595C2 (de) * 1983-12-23 1986-11-20 Max Frost Maschinen- und Apparatebau, 4508 Bohmte Bürstenhalter für elektrische Maschinen
US4602181A (en) * 1984-11-05 1986-07-22 Wolfgang Dietrich Brush holder assembly for use in electric machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021072523A1 (pt) * 2019-10-18 2021-04-22 Mersen Do Brasil Ltda. Porta escovas para motores elétricos de tração para locomotivas

Also Published As

Publication number Publication date
EP0455253A3 (en) 1992-07-29
DE59104929D1 (de) 1995-04-20
EP0455253A2 (de) 1991-11-06
DE4014300A1 (de) 1991-11-14
DE4014300C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-06-17
ES2071855T3 (es) 1995-07-01

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