EP0801825B1 - Carbon brush - Google Patents

Carbon brush Download PDF

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Publication number
EP0801825B1
EP0801825B1 EP96900555A EP96900555A EP0801825B1 EP 0801825 B1 EP0801825 B1 EP 0801825B1 EP 96900555 A EP96900555 A EP 96900555A EP 96900555 A EP96900555 A EP 96900555A EP 0801825 B1 EP0801825 B1 EP 0801825B1
Authority
EP
European Patent Office
Prior art keywords
collector
carbon brush
grooves
brush according
brush
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.)
Revoked
Application number
EP96900555A
Other languages
German (de)
French (fr)
Other versions
EP0801825A1 (en
Inventor
Rainer Bruhn
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.)
ITT Automotive Europe GmbH
Continental Teves AG and Co oHG
Original Assignee
ITT Automotive Europe GmbH
Alfred Teves 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7750926&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0801825(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ITT Automotive Europe GmbH, Alfred Teves GmbH filed Critical ITT Automotive Europe GmbH
Publication of EP0801825A1 publication Critical patent/EP0801825A1/en
Application granted granted Critical
Publication of EP0801825B1 publication Critical patent/EP0801825B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/26—Solid sliding contacts, e.g. carbon brush

Definitions

  • the invention relates to a carbon brush for an electric Machine that has an end face that leads to the system can be brought to a collector, according to the generic term of claim 1.
  • the contact surface has already been proposed to the axis of the collector or to the man of the collector.
  • the contact area will beveled accordingly. But this creates a sharp-edged transition between the contact surface and the lower side edge of the brush, so that at least in the initial phase operation of the motor only with the brush one edge abuts the collector.
  • these brushes generally dispensed with that when pressing the graphite mixture to remove the resulting hard surface. In In this case, the noise reduction that can be achieved is only slight. If the surface skin of the brush is removed after pressing, there is a risk that the edge will break off.
  • DE-A-1 538 982 discloses a carbon brush for one electrical machine with a curved face for Attachment to a collector of the electrical machine, the End face with respect to the axial direction of the collector is inclined. Regarding the desired noise reduction this structure is not a satisfactory solution.
  • the invention has for its object a reduction to achieve the noise level during operation.
  • the contact surface with respect to the axial direction of the collector tend. It only operates in the lower area with one or more Grooves to be provided in the transverse direction.
  • These grooves can be milled into the surface, so that at the same time removes the hard surface skin becomes.
  • the contact surface itself is according to the cylindrical one Curved surface of the collector.
  • the slope of the contact surface opposite the lateral surface of the collector lies in on the order of 6 to 10 degrees, preferably around 8 Degree.
  • the inclination to be set depends, among other things. also depend on which electrical currents are transmitted through the brush should.
  • FIGS. 1a, 1b, 1c show a carbon brush in different views
  • FIG. 2 shows a detail from FIG. 1a.
  • the carbon brush 1 shown consists of an elongated one Cuboid which is approximately square in cross section (FIG. 1b) and is approximately rectangular in longitudinal section (FIG. 1a).
  • Such a carbon brush is provided with a strand 2, via which the power supply takes place.
  • the brushes are in Quivers performed, arranged on a brush support plate are.
  • One end face of the brush, the contact face 3, reaches after assembling an engine to the lateral surface of a Collector 4.
  • the contact surface of the collector its outer surface is arranged.
  • the contact surface 3 of the brush 1 is now designed as follows: In the transverse direction, that is in the circumferential direction of the The collector is the contact surface 3, as in FIG. 1c recognize, curved. The curvature corresponds essentially the radius of the collector 4.
  • the contact surface 3 is to the outer surface of the collector 4 inclined. Between the outer surface of the Collector 4 and the contact surface 3 of the brush 1 is so a wedge-shaped gap 5 is formed.
  • the brush is preferably positioned in the holder so that the lower edge 6 is close to the brush support plate. However, it is also possible to position the brush so that the lower edge is at a distance from the brush support plate.
  • the grooves 10, 11, 12 are acute-angled, that is to say they have a triangular profile in cross section.
  • the lowermost groove 10 is open at the bottom, that is to say there is only a bevel relative to the underside 13 of the brush 1.
  • the brushes are made as follows.
  • Blanks are pressed and sintered from a mixture that essentially contains graphite.
  • the layer on the long sides of the brush can also be removed in this way.
  • the end face 3 is then beveled, as described above, with a corresponding curvature in the circumferential direction being achieved by the choice of the tool. Then one or more grooves are milled in the transverse direction on the lower edge.
  • the motor can be operated very quietly with such a carbon brush.
  • the protruding edges 14, 15 are often ground off during test runs of the engine. That is, the brush gradually includes a shape adapted to the outer surfaces of the collector, starting from the lower edge.
  • the contact surface 3 approximately an angle of 6 to 10 degrees to the outer surface of the collector should include.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Description

Die Erfindung bezieht sich auf eine Kohlebürste für eine elektrische Maschine, die eine Stirnfläche aufweist, die zur Anlage an einen Kollektor gebracht werden kann, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a carbon brush for an electric Machine that has an end face that leads to the system can be brought to a collector, according to the generic term of claim 1.

Derartige Bürsten sind schon vielfach beschrieben worden. Ein Beispiel kann der DE 31 48 996 entnommen werden.Such brushes have been described many times. On Example can be found in DE 31 48 996.

Das Problem, daß bei der Konstruktion derartiger Bürsten beachtet werden muß, besteht darin, daß die Einheit aus Bürste und Kollektor während des Betriebs Geräusche verursacht. Die Kontaktfläche der Bürste gleitet an der Oberfläche des Kollektors entlang, wodurch insbesondere durch die lamellenartige Struktur der Oberfläche des Kollektors Schwingungen induziert werden, die letztlich als Luftschall abgegeben und als Geräusch wahrgenommen werden. Es sind schon vielfach Vorschläge gemacht worden, um diese Geräuschbelastung zu reduzieren. Bei jedem neuen Vorschlag ist als Randbedingung zu beachten, daß der Übergangswiderstand zwischen Bürste und Kollektor nicht zu klein werden darf. Außerdem soll die Bürste eine ausreichende Abriebfestigkeit aufweisen, darf also nicht zu weich gestaltet werden.The problem that is considered in the construction of such brushes must be that the unit is made of brush and collector causes noise during operation. The Contact surface of the brush slides on the surface of the collector along, which is particularly due to the lamellar Structure of the surface of the collector induces vibrations that are ultimately emitted as airborne sound and as noise be perceived. There are many suggestions made to reduce this noise pollution. At Every new proposal has to take into account that the contact resistance between the brush and the collector does not increase may get small. In addition, the brush should be sufficient Have abrasion resistance, so it must not be too soft become.

So wurde zum Beispiel schon vorgeschlagen, die Kontaktfläche gegenüber der Achse des Kollektors bzw. gegenüber der Man telfläche des Kollektors zu neigen. Die Kontaktfläche wird dazu entsprechend angeschrägt. Dabei entsteht aber ein scharfkantiger Übergang zwischen der Kontaktfläche und der unteren Seitenkante der Bürste, so daß zumindest in der Anfangsphase des Betriebs des Motors die Bürste lediglich mit einer Kante an dem Kollektor anliegt. Bei diesen Bürsten wird im allgemeinen darauf verzichtet, die beim Pressen der Graphitmischung entstehende harte Oberfläche zu entfernen. In diesem Fall ist die erzielbare Geräuschreduzierung nur gering. Wird die Oberflächenhaut der Bürste nach dem Pressen entfernt, besteht die Gefahr, daß die Kante abbricht.For example, the contact surface has already been proposed to the axis of the collector or to the man of the collector. The contact area will beveled accordingly. But this creates a sharp-edged transition between the contact surface and the lower side edge of the brush, so that at least in the initial phase operation of the motor only with the brush one edge abuts the collector. With these brushes generally dispensed with that when pressing the graphite mixture to remove the resulting hard surface. In In this case, the noise reduction that can be achieved is only slight. If the surface skin of the brush is removed after pressing, there is a risk that the edge will break off.

Es ist aus der DE-U 680 2635 weiterhin bekannt, die Kontaktflächen der Bürste über die gesamte Fläche mit Längsrillen zu versehen, die sich in Querrichtung, d.h. in Umfangsrichtung des Kollektors erstrecken. Diese Maßnahme führt aber nur zu einer geringen Abnahme des Geräuschpegels.It is also known from DE-U 680 2635, the Contact areas of the brush over the entire area with To provide longitudinal grooves that are transverse, i.e. in Extend circumferential direction of the collector. This measure but only leads to a slight decrease in the noise level.

Die DE-A-1 538 982 offenbart eine Kohlenbürste für eine elektrische Maschine mit einer gekrümmten Stirnfläche zur Anlage an einen Kollektor der elektrischen Maschine, wobei die Stirnfläche in bezug auf die Axialrichtung des Kollektors geneigt ist. Hinsichtlich der gewünschten Geräuschminderung stellt dieser Aufbau keine befriedigende Lösung dar.DE-A-1 538 982 discloses a carbon brush for one electrical machine with a curved face for Attachment to a collector of the electrical machine, the End face with respect to the axial direction of the collector is inclined. Regarding the desired noise reduction this structure is not a satisfactory solution.

Der Erfindung liegt die Aufgabe zugrunde, eine Verminderung der Geräuschentwicklung während des Betriebs zu erzielen.The invention has for its object a reduction to achieve the noise level during operation.

Ausgehend von einer Kohlebürste, wie sie aus der DE-A1-15 38 982 bekannt ist, wird diese Aufgabe mit einer Kohlebürste gelöst, die die Merkmale des Anspruchs 1 aufweist.Starting from a carbon brush, as described in DE-A1-15 38 982 is known, this task is done with a carbon brush solved, which has the features of claim 1.

Es wird daher gemäß der Erfindung vorgeschlagen, die Kontaktfläche in Bezug auf die Axialrichtung des Kollektors zu neigen. Sie brancht lediglich im unteren Bereich mit einer oder mehreren Rillen in Querrichtung versehen zu sein. It is therefore proposed according to the invention, the contact surface with respect to the axial direction of the collector tend. It only operates in the lower area with one or more Grooves to be provided in the transverse direction.

Diese Rillen können in die Oberfläche eingefräst werden, so daß dabei gleichzeitig die harte Oberflächenhaut entfernt wird.These grooves can be milled into the surface, so that at the same time removes the hard surface skin becomes.

Es hat sich herausgestellt, daß zwei oder drei Rillen ausreichend sind, wobei die unterste Rille nach unten hin offen sein kann. Die Kontaktfläche selbst ist gemäß der zylindrischen Oberfläche des Kollektors gekrümmt. Die Neigung der Kontaktfläche gegenüber der Mantelfläche des Kollektors liegt in der Größenordnung von 6 bis 10 Grad, vorzugsweise bei ca. 8 Grad. Die einzustellende Neigung hängt u.a. auch davon ab, welche elektrischen Ströme durch die Bürste übertragen werden sollen.It has been found that two or three grooves are sufficient with the bottom groove open at the bottom can be. The contact surface itself is according to the cylindrical one Curved surface of the collector. The slope of the contact surface opposite the lateral surface of the collector lies in on the order of 6 to 10 degrees, preferably around 8 Degree. The inclination to be set depends, among other things. also depend on which electrical currents are transmitted through the brush should.

Die Neigung kann umso kleiner gewählt werden, je höher die elektrischen Ströme sind, die zu übertragen sind. The lower the inclination, the higher the are electrical currents to be transmitted.

Die Erfindung wird im folgenden anhand von 4 Figuren näher erläutert.The invention is explained in more detail below with the aid of 4 figures explained.

Die Figuren 1a,1b,1c zeigen eine Kohlebürste in verschiedenen Ansichten,
die Figur 2 einen Ausschnitt aus der Figur 1a.FIGS. 1a, 1b, 1c show a carbon brush in different views,
FIG. 2 shows a detail from FIG. 1a.

Die dargestellt Kohlebürste 1 besteht aus einem länglichen Quader, der im Querschnitt (Figur 1b) in etwa quadratisch und im Längsschnitt (Figur 1a) in etwa rechteckig ist.The carbon brush 1 shown consists of an elongated one Cuboid which is approximately square in cross section (FIG. 1b) and is approximately rectangular in longitudinal section (FIG. 1a).

Eine derartige Kohlebürste ist mit eine Litze 2 versehen, über die die Stromzuführung erfolgt. Die Bürsten werden in Köchern geführt, die auf eine Bürstentrageplatte angeordnet sind.Such a carbon brush is provided with a strand 2, via which the power supply takes place. The brushes are in Quivers performed, arranged on a brush support plate are.

Eine Stirnfläche der Bürste, die Kontaktfläche 3, gelangt nach dem Zusammenbau eines Motors an die Mantelfläche eines Kollektors 4.One end face of the brush, the contact face 3, reaches after assembling an engine to the lateral surface of a Collector 4.

Im Ausführungsbeispiel ist ein zylinderförmiger Kollektor vorgesehen, wobei die Kontaktfläche des Kollektors auf seiner Mantelfläche angeordnet ist. Die Kontaktfläche 3 der Bürste 1 gelangt zur Anlage an die Mantelfläche/Kontaktfläche des Kollektors 4.In the exemplary embodiment is a cylindrical collector provided, the contact surface of the collector its outer surface is arranged. The contact surface 3 the brush 1 comes to rest on the Shell surface / contact surface of the collector 4.

Die Kontaktfläche 3 der Bürste 1 ist nun wie folgt gestaltet: In Querrichtung, das heißt in Umfangsrichtung des Kollektors ist die Kontaktfläche 3, wie in Figur 1c zu erkennen, gekrümmt. Die Krümmung entspricht dabei im wesentlichen dem Radius des Kollektors 4.The contact surface 3 of the brush 1 is now designed as follows: In the transverse direction, that is in the circumferential direction of the The collector is the contact surface 3, as in FIG. 1c recognize, curved. The curvature corresponds essentially the radius of the collector 4.

In Axialrichtung ist die Kontaktfläche 3 zur Mantelfläche des Kollektors 4 geneigt. Zwischen der Mantelfläche des Kollektors 4 und der Kontaktfläche 3 der Bürste 1 ist damit ein keilförmiger Spalt 5 ausgebildet. Die untere Kante 6, das ist die Kante, die an der Mantelfläche des Kollektors 4 anliegt, ist mit ein oder mehreren Rillen 10,11,12 versehen, die sich in Querrichtung über die gesamte Breite der Kontaktfläche 3 erstrecken. In the axial direction, the contact surface 3 is to the outer surface of the collector 4 inclined. Between the outer surface of the Collector 4 and the contact surface 3 of the brush 1 is so a wedge-shaped gap 5 is formed. The bottom edge 6, this is the edge on the outer surface of the collector 4 is present, is with one or more grooves 10, 11, 12 provided that extend across the full width extend the contact surface 3.

Die Bürste wird vorzugsweise so im Köcher positioniert, daß die untere Kante 6 nahe der Bürstentrageplatte ist. Es ist allerdings auch möglich die Bürste so zu positioneren, daß die untere Kante einen Abstand zur Bürstentrageplatte aufweist.The brush is preferably positioned in the holder so that the lower edge 6 is close to the brush support plate. However, it is also possible to position the brush so that the lower edge is at a distance from the brush support plate.

Wie aus der Figur 2 zu erkennen ist, sind die Rillen 10, 11, 12 spitzwinklig, das heißt sie weisen im Querschnitt ein dreieckförmiges Profil auf. Dabei ist die unterste Rille 10, nach unten offen, das heißt es erfolgte lediglich eine Abschrägung gegenüber der Unterseite 13 der Bürste 1.As can be seen from FIG. 2, the grooves 10, 11, 12 are acute-angled, that is to say they have a triangular profile in cross section. The lowermost groove 10 is open at the bottom, that is to say there is only a bevel relative to the underside 13 of the brush 1.

Die Bürsten werden wie folgt hergestellt.The brushes are made as follows.

Aus einer Mischung, die im wesentlichen Graphit enthält, werden Rohlinge gepreßt und gesintert. Dabei steht an der Oberfläche der Bürsten eine harte Schicht, die zumindest im Bereich der Stirnfläche 3 abgeschmirgelt bzw. abgefräst werden muß. Auch die Schicht an den Längsseiten der Bürste kann auf diese Weise entfernt werden.Blanks are pressed and sintered from a mixture that essentially contains graphite. There is a hard layer on the surface of the brushes, which must be sanded or milled off at least in the area of the end face 3. The layer on the long sides of the brush can also be removed in this way.

Sodann wird die Stirnfläche 3, wie oben beschrieben, angeschrägt, wobei durch die Wahl des Werkzeuges eine entsprechende Krümmung in Umfangsrichtung erzielt wird. Sodann werden an der unteren Kante eine oder mehrere Rillen in Querrichtung eingefräst.The end face 3 is then beveled, as described above, with a corresponding curvature in the circumferential direction being achieved by the choice of the tool. Then one or more grooves are milled in the transverse direction on the lower edge.

Mit einer derartigen Kohlenbürste kann der Motor sehr geräuscharm betrieben werden. Die vorstehenden Kanten 14,15 werden häufig schon bei Probeläufen des Motors abgeschliffen. Das heißt die Bürste enthält von der unteren Kante beginnend nach und nach eine der Außenflächen des Kollektors angepaßte Form.The motor can be operated very quietly with such a carbon brush. The protruding edges 14, 15 are often ground off during test runs of the engine. That is, the brush gradually includes a shape adapted to the outer surfaces of the collector, starting from the lower edge.

Es hat sich herausgestellt, daß auf diese Weise der Motor sehr geräuscharm arbeitet.It has been found that the motor works very quietly in this way.

Ergänzend sei ausgeführt, daß die Kontaktfläche 3 etwa einen Winkel von 6 bis 10 Grad zur Mantelfläche des Kollektors einschließen soll.In addition, it should be stated that the contact surface 3 approximately an angle of 6 to 10 degrees to the outer surface of the collector should include.

Claims (9)

  1. A carbon brush for an electrical machine having a front surface (3), arranged to be brought into contact with a collector (4), and being inclined relative to an axial direction of the collector (4), characterized in that the front surface (3) is inclined that an edge (6) is in contact with the collector (4) and the area of said edge (6) protruding to the collector (4) is provided with one or more grooves (10, 11, 12) at the lower portion of the surface (3) facing the collector (4), that the grooves (10, 11, 12) extend in transverse direction of the collector (4) and that the front surface (3) is curved essentially according to a cylindrical contact surface of the collector (4), wherein each bottom of the grooves (10, 11, 12) is arranged in one plane, which is inclined correspondingly to the inclination of the front surface (3) with regard to the contact surface of the collector (4).
  2. A carbon brush according to claim 1, characterized in that two or three grooves (10, 11, 12) are provided.
  3. A carbon brush according to claim 1 or 2, characterized in that the grooves (10, 11, 12) have a substantially triangular cross section.
  4. A carbon brush according to claim 1, 2 or 3, characterized in that the lowest groove (10) is open toward the bottom surface.
  5. A carbon brush according to claim 1, characterized in that the inclination of the contact surface (3) the collector (4) is by approximately 6 - 10 degrees.
  6. A carbon brush according to claim 5, characterized in that the inclination is preferably 8 degrees.
  7. A carbon brush according to claim 1, characterized in that the lower edge (6) of the contact surface (3) is situated near the brush carrier plate, on which cartridge-type brush holders are arranged in which the carbon brush (1) is guided.
  8. A carbon brush according to claim 1, characterized in that the lower portion is provided with grooves (10, 11, 12) only.
  9. A carbon brush according to one of the preceding claims, characterized in that the surface layer formed during the pressing process of the brush is removed.
EP96900555A 1995-01-03 1996-01-02 Carbon brush Revoked EP0801825B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19500016 1995-01-03
DE19500016 1995-01-03
PCT/EP1996/000001 WO1996021260A1 (en) 1995-01-03 1996-01-02 Carbon brush

Publications (2)

Publication Number Publication Date
EP0801825A1 EP0801825A1 (en) 1997-10-22
EP0801825B1 true EP0801825B1 (en) 2000-05-17

Family

ID=7750926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900555A Revoked EP0801825B1 (en) 1995-01-03 1996-01-02 Carbon brush

Country Status (9)

Country Link
US (1) US5909077A (en)
EP (1) EP0801825B1 (en)
JP (1) JPH10511838A (en)
BR (1) BR9606965A (en)
CZ (1) CZ287118B6 (en)
DE (2) DE19533031A1 (en)
ES (1) ES2145423T3 (en)
HU (1) HUP9802169A3 (en)
WO (1) WO1996021260A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19962363A1 (en) * 1999-12-23 2001-06-28 Pierburg Ag Wet running DC motor
KR20020074325A (en) * 2001-03-20 2002-09-30 주식회사 캄코 Brush for an electric motor
JP3511513B2 (en) * 2001-05-10 2004-03-29 三菱電機株式会社 Brush equipment
US7265475B2 (en) * 2004-03-30 2007-09-04 Trico Products Corporation Electric motor having convex high-speed brush
US20060055276A1 (en) * 2004-09-16 2006-03-16 O'donnell Steven B Keyed motor brushes
FR2896095B1 (en) * 2006-01-11 2008-06-13 Siemens Vdo Automotive Sas BROOM FOR ELECTRIC MOTOR
DE102007053314A1 (en) 2007-11-08 2009-05-14 Robert Bosch Gmbh Carbon brush for electric machine, has bearing area brought in contact element of electric machine rotated for arrangement, where bearing surface area of carbon brush is increased during pre-defined running-in period
DE102010009833A1 (en) * 2009-03-03 2010-10-07 Johnson Electric S.A. electric motor
CN108233583B (en) * 2016-12-14 2021-11-30 德昌电机(深圳)有限公司 Motor and electric brush thereof
JP7463859B2 (en) * 2020-06-08 2024-04-09 株式会社オートネットワーク技術研究所 Wire Harness Unit
JP7463860B2 (en) * 2020-06-08 2024-04-09 株式会社オートネットワーク技術研究所 Wire Harness Unit
JP7524672B2 (en) * 2020-08-26 2024-07-30 住友電装株式会社 Wire Harness Unit

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206366A (en) * 1937-10-22 1940-07-02 Albert G Redmond Brush assembly for dynamoelectric machines
US2296366A (en) * 1941-12-29 1942-09-22 Standard Oil Dev Co Borehole tool
US3205382A (en) * 1960-07-01 1965-09-07 Ford Motor Co Dynamoelectric machine
US3467846A (en) * 1965-05-05 1969-09-16 Lorraine Carbone Brushes for electric motors
DE6802635U (en) * 1968-01-11 1969-03-13 Rau Swf Autozubehoer CHARCOAL BRUSH FOR ELECTRIC MACHINERY
GB1255501A (en) * 1968-01-19 1971-12-01 Lucas Industries Ltd Electric motors
US3794869A (en) * 1972-11-15 1974-02-26 Ford Motor Co Dynamoelectric machine end plate and mounting means
DE7626775U1 (en) * 1976-08-27 1976-12-16 Deutsche Carbone Ag, 6000 Frankfurt Carbon brush for electrical machines
FR2437710A1 (en) * 1978-09-26 1980-04-25 Lorraine Carbone Grooved brushes for electrical machines - have grooves, pref. of triangular cross=section formed in rubbing face without intersecting periphery of brush to avoid chipping
JPS55109155A (en) * 1979-02-09 1980-08-22 Matsushita Electric Works Ltd Carbon brush for motor
DE7917605U1 (en) * 1979-06-20 1980-11-27 Deutsche Carbone Ag, 6000 Frankfurt Low-noise carbon brush
SU1092630A1 (en) * 1982-12-24 1984-05-15 Предприятие П/Я В-4514 Electric machine brush
JPH058787Y2 (en) * 1989-05-15 1993-03-04
US5414319A (en) * 1994-03-02 1995-05-09 Lucas Aerospace Power Equipment Corporation Dynamoelectric machine with brush having slanted core

Also Published As

Publication number Publication date
DE19533031A1 (en) 1996-07-04
CZ287118B6 (en) 2000-09-13
EP0801825A1 (en) 1997-10-22
DE59605249D1 (en) 2000-06-21
CZ208897A3 (en) 1997-11-12
US5909077A (en) 1999-06-01
HUP9802169A3 (en) 2002-03-28
JPH10511838A (en) 1998-11-10
HUP9802169A2 (en) 1998-12-28
BR9606965A (en) 1999-01-26
ES2145423T3 (en) 2000-07-01
WO1996021260A1 (en) 1996-07-11

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