EP0455253A2 - Porte-balais - Google Patents

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Publication number
EP0455253A2
EP0455253A2 EP91107183A EP91107183A EP0455253A2 EP 0455253 A2 EP0455253 A2 EP 0455253A2 EP 91107183 A EP91107183 A EP 91107183A EP 91107183 A EP91107183 A EP 91107183A EP 0455253 A2 EP0455253 A2 EP 0455253A2
Authority
EP
European Patent Office
Prior art keywords
carbon brush
shaft
slope
brush
carbon
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.)
Granted
Application number
EP91107183A
Other languages
German (de)
English (en)
Other versions
EP0455253A3 (en
EP0455253B1 (fr
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/fr
Publication of EP0455253A3 publication Critical patent/EP0455253A3/de
Application granted granted Critical
Publication of EP0455253B1 publication Critical patent/EP0455253B1/fr
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 path 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 can be introduced onto the carbon brush in the area of the foot thereof by means of an element which acts permanently on the side surface of the carbon brush and acts on the carbon brush shaft wall.
  • 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. Due to 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 rest 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 arrangement is known from US-A 2,532,827. According to one embodiment, this assumes 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 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 region 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 bears on the corresponding coal shaft wall on the surface opposite the contact surface. This in turn means that a shifting of the base 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 also 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 in 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 further element in particular in the form of the roller element which can be rotated about an axis running parallel to the slope, 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 fundamentally known per se, with features designed according to the invention ensuring that transverse forces F act on a carbon brush (12). so that shifting or tilting of the carbon brush (12) is excluded, in particular in a reversing operation.
  • the brush holder (10) has a carbon brush shaft (14) which is intended for the carbon brush (12) and through which the carbon brush (12) passes 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 is on the head surface (20) of the carbon brush (12) acts.
  • the head surface (20) is chamfered so that a transverse force in the direction of the arrow F can be caused.
  • the pressure lever (16) has bearing journals (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 indirectly comes 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).
  • the carbon brush (12) acts on the carbon brush (12) on the carbon brush (12) to be displaced along an incline (38) in order to produce the transverse force in the foot region (36) ) a.
  • the bevel (38) is formed by sections of the legs (26) and (28).
  • the fastening (32) for the helical spring (30) runs between the sections of the element (40) designed as cylinders.
  • the attachment (32) starts from the shaft (42).
  • the shaft (42) and thus the roller element (40) endeavors to be displaced along the slope (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 such that the carbon brush (12) lies flat against the carbon brush shaft wall (34).
  • the slope (38) runs in the region of a recess (44), which lies opposite that wall of the carbon brush shaft on which the carbon brush (12) bears due to the transverse forces F.
  • the slope (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 slope (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) has a double function, namely to pivot the pressure lever (16) and thus the pressure finger (18) towards the carbon brush (12) and to move the element (40) along the slope (38) until there is a firm contact with the surface of the carbon brush (12) opposite the wall (34).
  • the lateral 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 Porte-balais Expired - Lifetime EP0455253B1 (fr)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=6405691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107183A Expired - Lifetime EP0455253B1 (fr) 1990-05-04 1991-05-03 Porte-balais

Country Status (3)

Country Link
EP (1) EP0455253B1 (fr)
DE (2) DE4014300A1 (fr)
ES (1) ES2071855T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0851541A1 (fr) * 1996-12-27 1998-07-01 Mitsuba Corporation Dispositif de porte-balais
EP0884810A2 (fr) * 1997-06-13 1998-12-16 Itt Manufacturing Enterprises, Inc. Balai en charbon pour machines électriques
CN114123674A (zh) * 2021-11-30 2022-03-01 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
CN114792918A (zh) * 2022-03-31 2022-07-26 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
US11545868B2 (en) * 2020-05-29 2023-01-03 Audi Ag Electric motor, in particular a separately excited synchronous motor
CN115663550A (zh) * 2022-09-07 2023-01-31 中国科学院电工研究所 一种压力可调的碳刷压紧机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011085997A1 (de) 2011-11-09 2013-05-16 Robert Bosch Gmbh Schwingungsreduzierter Bürstenhalter für einen Elektromotor
BR102019021921A2 (pt) * 2019-10-18 2020-02-11 Mersen Do Brasil Ltda. Porta escovas para motores elétricos de tração para locomotivas

Citations (4)

* 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
DE1488671A1 (de) * 1965-05-11 1969-06-19 Lorraine Carbone Buerstenhalter fuer Stromkollektoren von elektrischen Maschinen
DE3346595A1 (de) * 1983-12-23 1985-07-04 Frost Masch & App Max Buerstenhalter fuer elektrische maschinen
US4602181A (en) * 1984-11-05 1986-07-22 Wolfgang Dietrich Brush holder assembly for use in electric machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1269403A (en) * 1968-06-21 1972-04-06 Gen Electric Improvements in brush holding arrangements in dynamoelectric machines
FR2217828B1 (fr) * 1973-02-08 1978-08-04 Ferraz & Cie Lucien

Patent Citations (4)

* 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
DE1488671A1 (de) * 1965-05-11 1969-06-19 Lorraine Carbone Buerstenhalter fuer Stromkollektoren von elektrischen Maschinen
DE3346595A1 (de) * 1983-12-23 1985-07-04 Frost Masch & App Max Buerstenhalter fuer elektrische maschinen
US4602181A (en) * 1984-11-05 1986-07-22 Wolfgang Dietrich Brush holder assembly for use in electric machines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0851541A1 (fr) * 1996-12-27 1998-07-01 Mitsuba Corporation Dispositif de porte-balais
US6031313A (en) * 1996-12-27 2000-02-29 Mitsuba Corporation Brush holder device
EP0884810A2 (fr) * 1997-06-13 1998-12-16 Itt Manufacturing Enterprises, Inc. Balai en charbon pour machines électriques
EP0884810A3 (fr) * 1997-06-13 2000-01-12 Itt Manufacturing Enterprises, Inc. Balai en charbon pour machines électriques
US11545868B2 (en) * 2020-05-29 2023-01-03 Audi Ag Electric motor, in particular a separately excited synchronous motor
CN114123674A (zh) * 2021-11-30 2022-03-01 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
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
CN114792918A (zh) * 2022-03-31 2022-07-26 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
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
CN115663550A (zh) * 2022-09-07 2023-01-31 中国科学院电工研究所 一种压力可调的碳刷压紧机构
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

Also Published As

Publication number Publication date
EP0455253A3 (en) 1992-07-29
DE59104929D1 (de) 1995-04-20
DE4014300A1 (de) 1991-11-14
DE4014300C2 (fr) 1992-06-17
ES2071855T3 (es) 1995-07-01
EP0455253B1 (fr) 1995-03-15

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