EP0358812B1 - Brush holder of the cartridge type for a multilayer brush - Google Patents

Brush holder of the cartridge type for a multilayer brush Download PDF

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Publication number
EP0358812B1
EP0358812B1 EP19880115219 EP88115219A EP0358812B1 EP 0358812 B1 EP0358812 B1 EP 0358812B1 EP 19880115219 EP19880115219 EP 19880115219 EP 88115219 A EP88115219 A EP 88115219A EP 0358812 B1 EP0358812 B1 EP 0358812B1
Authority
EP
European Patent Office
Prior art keywords
brush
multilayer
holder
brush holder
insulation layer
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
EP19880115219
Other languages
German (de)
French (fr)
Other versions
EP0358812A1 (en
Inventor
Matthias Dipl.-Ing.(Fh) Fuss
Rolf Dipl.-Ing.(Fh) Tapprich
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP19880115219 priority Critical patent/EP0358812B1/en
Priority to DE8888115219T priority patent/DE3882045D1/en
Publication of EP0358812A1 publication Critical patent/EP0358812A1/en
Application granted granted Critical
Publication of EP0358812B1 publication Critical patent/EP0358812B1/en
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
    • H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
    • 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

Definitions

  • the invention relates to a metal brush holder for a multi-layer brush according to the preamble of claim 1; such a metal brush holder is known from Richter: “Electrical Machines", 1950, 5th volume, pages 83-86.
  • the insulation of the guide walls of the brush holder is advantageous according to the invention by a polytetrafluoroethylene Insulation layer reached.
  • the brush holder is punched or formed from a metal plate provided with the polytetrafluoroethylene insulation layer; In terms of production technology, this provides a considerable advantage over the subsequent coating of the guide walls on the already formed brush holder.
  • a multilayer brush 3 is held in a metal brush holder 2 and pressed by means of a bow spring 5, which extends through a slot opening 21 into the interior of the brush holder 2 and rests on the radial surface of the brush 3, with its lower grinding surface against lamellae 11 of a commutator 1 .
  • a brush connection wire 4, which is in contact with the upper radial end of the multilayer brush 3, is used for the power supply.
  • the multilayer brush 3 consists, in a manner known per se, of at least two layers 31, 32 with at least one insulation intermediate layer 33, such that no direct short-circuit cross currents can flow in the region of the guide walls of the multilayer brush 3 when two adjacent lamellae are in the rest position.
  • a polytetrafluoroethylene insulation layer 22 is applied as an insulation layer between the multilayer brush 3 and the lateral guide walls of the brush holder 2 onto the guide surfaces facing the multilayer brush 3.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Description

Die Erfindung bezieht sich auf einen Metall-Bürstenköcher für eine Mehrschicht-Bürste gemäß Oberbegriff des Anspruchs 1; ein derartiger Metall-Bürstenköcher ist durch Richter: "Elektrische Maschinen", 1950, 5. Band, Seiten 83-86 bekannt.The invention relates to a metal brush holder for a multi-layer brush according to the preamble of claim 1; such a metal brush holder is known from Richter: "Electrical Machines", 1950, 5th volume, pages 83-86.

Um die schädliche Wirkung der sogenannten Ruhe-EMK auf die Kommutierung von AC-Universalmotoren zu vermeiden, ist es bekannt geschichtete Bürsten in Form von sogenannten MehrschichtBürsten zur Erhöhung des Widerstandes im Kurzschlußkreis zu verwenden. Damit dieser Effekt nicht durch eine leitende Überbrückung der einzelnen gegeneinander isolierten Schichten der Mehrschichtbürste durch die Bürsten-Führungswände des Metall-Bürstenköchers wieder, zumindest teilweise, aufgehoben wird, ist es auch bekannt, die Führungswände gegenüber den sie berührenden Mehrschicht-Bürsten zu isolieren.In order to avoid the harmful effect of the so-called resting EMF on the commutation of AC universal motors, it is known to use layered brushes in the form of so-called multi-layer brushes to increase the resistance in the short circuit. So that this effect is not, at least partially, canceled out by a conductive bridging of the individual mutually insulated layers of the multilayer brush by the brush guide walls of the metal brush holder, it is also known to isolate the guide walls from the multilayer brushes touching them.

Eine besonders betriebssichere, auch bei hohen Betriebs-Standzeiten voll wirksam bleibende und in Kombination damit besonders günstige Reibverhältnisse im Sinne eines möglichst kleinen Unterschiedes zwischen Haft- und Gleitreibwert bei hinsichtlich des absoluten Wertes geringer Reibung vorteilhafte Isolierung der Führungswände des Bürstenköchers wird erfindungsgemäß durch eine Polytetrafluoräthylen-Isolationsschicht erreicht.A particularly reliable, even with long service life, which remains fully effective and, in combination, particularly favorable friction conditions in terms of the smallest possible difference between the static and sliding friction coefficient with low friction in terms of absolute value, the insulation of the guide walls of the brush holder is advantageous according to the invention by a polytetrafluoroethylene Insulation layer reached.

Es hat sich in überraschender Weise gezeigt, daß eine Polytetrafluoräthylen-Beschichtung hinsichtlich sämtlicher für die Kommutierung und die Bürstenstandzeiten maßgeblicher Parameter optimale Kombination darstellt.Surprisingly, it has been shown that a polytetrafluoroethylene coating is the optimal combination with regard to all parameters relevant for commutation and brush life.

Aufgrund der sich ergebenden hohen Elastizität und großen Haftfähigkeit der erfindungsgemäßen Polytetrafluoräthylen-Isolationsschicht ist nach einer Ausgestaltung der Erfindung vorgesehen, daß der Bürstenköcher aus einer mit der Polytetrafluoräthylen-Isolationsschicht versehene Metall-Platine gestanzt bzw. geformt ist; dies erbringt fertigungstechnisch einen erheblichen Vorteil gegenüber der nachträglichen Beschichtung der Führungswände am bereits fertig geformten Bürstenköcher.Due to the resulting high elasticity and great adhesiveness of the polytetrafluoroethylene insulation layer according to the invention, it is provided according to one embodiment of the invention that the brush holder is punched or formed from a metal plate provided with the polytetrafluoroethylene insulation layer; In terms of production technology, this provides a considerable advantage over the subsequent coating of the guide walls on the already formed brush holder.

Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung werden im folgenden anhand eines schematisch dargestellten Ausführungsbeispiels in der Zeichnung näher erläutert; darin zeigen:

FIG 1
eine kommutatorseitige Draufsicht auf einen Metall-Bürstenköcher mit Isolationsschicht und Mehrfachbürste in Blickrichtung I-I gemäß FIG 2,
FIG 2
einen radialen Schnitt gemäß Schnittverlauf II-II durch den Metall-Bürstenköcher gemäß FIG 1.
The invention and further advantageous embodiments of the invention are explained in more detail below with reference to a schematically illustrated embodiment in the drawing; show in it:
FIG. 1
3 shows a commutator-side plan view of a metal brush holder with an insulation layer and a multiple brush in viewing direction II according to FIG. 2,
FIG 2
a radial section along section line II-II through the metal brush holder according to FIG. 1

In einem Metall-Bürstenköcher 2 ist eine Mehrschicht-Bürste 3 geführt gehalten und mittels einer durch eine Schlitzöffnung 21 in das Innere des Bürstenköchers 2 reichende, auf der radialen Oberfläche der Bürste 3 aufliegende Bügelfeder 5 mit ihrer unteren Schleiffläche gegen Lamellen 11 eines Kommutators 1 angedrückt. Zur Stromzuführung dient eine mit dem oberen radialen Ende der Mehrschicht-Bürste 3 kontaktierte Bürstenanschlußlitze 4.A multilayer brush 3 is held in a metal brush holder 2 and pressed by means of a bow spring 5, which extends through a slot opening 21 into the interior of the brush holder 2 and rests on the radial surface of the brush 3, with its lower grinding surface against lamellae 11 of a commutator 1 . A brush connection wire 4, which is in contact with the upper radial end of the multilayer brush 3, is used for the power supply.

Die Mehrschicht-Bürste 3 besteht in an sich bekannter Weise aus zumindest zwei Schichten 31,32 mit zumindest einer Isolationszwischenlage 33, derart daß in Ruhestellung beim Kontaktieren zweier benachbarter Lamellen keine direkten Kurzschlußquerströme im Bereich der Führungswände der Mehrschicht-Bürste 3 fließen können.The multilayer brush 3 consists, in a manner known per se, of at least two layers 31, 32 with at least one insulation intermediate layer 33, such that no direct short-circuit cross currents can flow in the region of the guide walls of the multilayer brush 3 when two adjacent lamellae are in the rest position.

Erfindungsgemäß ist als Isolationsschicht zwischen der Mehrschichtbürste 3 und den seitlichen Führungswänden des Bürstenköchers 2 auf die den der Mehrschichtbürste 3 zugewandten Führungsflächen eine Polytetrafluorathylen-Isolationsschicht 22 aufgetragen.According to the invention, a polytetrafluoroethylene insulation layer 22 is applied as an insulation layer between the multilayer brush 3 and the lateral guide walls of the brush holder 2 onto the guide surfaces facing the multilayer brush 3.

Claims (2)

  1. Tubular metal brush-holder (2) for a multilayer brush (3) having an insulation layer (22) which is applied to the brush-guiding walls to prevent electrical short circuits between the brush layers (31, 32), characterised in that a polytetrafluoroethylene insulation layer (22) is applied to the brush-guiding walls of the tubular brush-holder (2).
  2. Tubular metal brush-holder according to claim 1, characterised in that the tubular brush-holder (2) is punched or formed from a metal plate bar provided with a polytetrafluoroethylene insulation layer (22).
EP19880115219 1988-09-16 1988-09-16 Brush holder of the cartridge type for a multilayer brush Expired - Lifetime EP0358812B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19880115219 EP0358812B1 (en) 1988-09-16 1988-09-16 Brush holder of the cartridge type for a multilayer brush
DE8888115219T DE3882045D1 (en) 1988-09-16 1988-09-16 METAL BRUSH COOKER FOR A MULTILAYER BRUSH.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19880115219 EP0358812B1 (en) 1988-09-16 1988-09-16 Brush holder of the cartridge type for a multilayer brush

Publications (2)

Publication Number Publication Date
EP0358812A1 EP0358812A1 (en) 1990-03-21
EP0358812B1 true EP0358812B1 (en) 1993-06-23

Family

ID=8199330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880115219 Expired - Lifetime EP0358812B1 (en) 1988-09-16 1988-09-16 Brush holder of the cartridge type for a multilayer brush

Country Status (2)

Country Link
EP (1) EP0358812B1 (en)
DE (1) DE3882045D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1618151B (en) * 2001-11-26 2012-09-05 申克意大利股份有限公司 Carbon brush box and method for the production thereof

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69422790T2 (en) * 1993-12-22 2000-09-07 Denso Corp Rotating electrical machine with commutator
DE59400459D1 (en) * 1994-11-24 1996-08-29 Siemens Ag Commutator motor with multi-layer brushes
DE10002786A1 (en) * 2000-01-13 2001-08-16 Schunk Italia S R L Carbon holder arrangement for electric motors has guide elements along opposing guide surfaces of brushes or bounding edges separate from sections independently fixed in bearer plate
DE10012740A1 (en) * 2000-03-16 2001-09-27 Schunk Italia S R L Carbon brush holder for electric motors with insulating support plate etc. of ceramic or plastics material
DE10347764A1 (en) 2003-10-14 2005-05-12 Bsh Bosch Siemens Hausgeraete Insulated carbon brush guide
EP2571115B1 (en) 2011-09-16 2018-08-15 Schleifring GmbH Modular brush holder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536602B1 (en) * 1982-11-24 1985-10-04 Ducellier & Cie THERMOPLASTIC MATERIAL BEARING FOR ELECTRIC MACHINE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1618151B (en) * 2001-11-26 2012-09-05 申克意大利股份有限公司 Carbon brush box and method for the production thereof

Also Published As

Publication number Publication date
DE3882045D1 (en) 1993-07-29
EP0358812A1 (en) 1990-03-21

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