WO2003071637A1 - Bürste für einen kommutator einer elektrischen maschine - Google Patents
Bürste für einen kommutator einer elektrischen maschine Download PDFInfo
- Publication number
- WO2003071637A1 WO2003071637A1 PCT/DE2002/003620 DE0203620W WO03071637A1 WO 2003071637 A1 WO2003071637 A1 WO 2003071637A1 DE 0203620 W DE0203620 W DE 0203620W WO 03071637 A1 WO03071637 A1 WO 03071637A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brush
- cable
- section
- cross
- commutator
- Prior art date
Links
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
- H01R39/383—Brush holders characterised by the electrical connection to the brush holder
Definitions
- the invention relates to a brush for a commutator of an electrical machine with the features of the preamble of claim 1.
- Electrical machines are, for example, electric motors or generators.
- the brush according to the invention is intended in particular for small motors with a small installation space in the area of the commutator.
- the brushes are often carbon brushes, the brush cable strands, the stripped or insulation-free ends of which are pressed into the brush and are thus mechanically connected to the brush and electrically contacted.
- the brush according to the invention with the features of claim 1 has a brush cable with a non-circular cross section.
- the cross section is preferably oval or elliptical.
- the invention has the advantage that for a given cross-sectional area of the brush cable, a slot for the passage of the brush cable in a brush holder, in which the brush lies displaceably, can be narrower than in the case of a brush cable with a circular cross-section. In this way, good lateral guidance of the brush in the brush holder can be achieved.
- a further advantage is that the brush cable according to the invention can be bent with a smaller radius or, for a given bending radius, has smaller tensile and compressive stresses than a brush cable with a circular cross-section and the same cross-sectional area.
- the brush according to the invention can be accommodated with the brush cable in a narrower installation space in the electrical machine and the risk of vibration breaks in the brush cable is reduced.
- An additional advantage of the invention is that it is cost-neutral, i. H. can be produced with the same effort as a conventional brush.
- the brush according to the invention can also be produced with the same pressing tool as a conventional brush; all that is required is to replace a usually circular socket for feeding the brush cable with a socket of oval or elliptical cross section.
- the invention is intended in particular for use in small motors, such as are used, for example, for opening and closing electrically operated sunroofs in motor vehicles.
- the brush 10 according to the invention shown in the drawing is a so-called carbon brush, which lies in a brush holder 12 radially to a commutator 14 of an electrical machine, not shown, in particular a small motor.
- a spring element 16 designed as a leaf spring presses the brush 10 resiliently against a circumference of the commutator 14.
- a stripped end of a strand, which forms a brush cable 18, is pressed into the brush 10.
- the brush cable 18 has an oval cross-sectional area and is pressed into the brush 10 such that a large semiaxis of the oval cross section is arranged in the direction of displacement of the brush 10 and a small semiaxis is arranged transversely to the direction of displacement.
- the cross section of the brush cable 18 is shown in FIG. 2 and is designated by the reference number 20.
- This arrangement of the brush cable 18 allows a narrow slot 22 in the brush holder 12 for the passage of the brush cable 18.
- the brush cable 18 is guided on two opposite elongated sides of its oval cross section in the slot 22 of the brush holder 12 and thus in the same direction as the brush 10.
- the brush cable 18 is bent transversely to the small semiaxis of its oval cross-section, whereby a small bending radius is possible.
- the brush 10 according to the invention is produced in a manner known per se by pressing in a press device (not shown).
- the strand forming the brush cable 18 is fed during manufacture through a socket on an upper punch of the pressing device.
- a bushing with an oval cross section is used to produce the brush according to the invention for supplying the strand forming the brush cable 18. It can therefore be an existing one Press device for producing the brush 10 according to the invention can be used. Since such pressing devices are known per se to the person skilled in the art, this is not to be dealt with in more detail here.
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02774410A EP1479134A1 (de) | 2002-02-16 | 2002-09-25 | Bürste für einen kommutator einer elektrischen maschine |
BR0208918-1A BR0208918A (pt) | 2002-02-16 | 2002-09-25 | Escova para um comutador de uma máquina elétrica |
US10/500,669 US20050077799A1 (en) | 2002-02-16 | 2002-09-25 | Brush for the commutator of an electric machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10206498A DE10206498A1 (de) | 2002-02-16 | 2002-02-16 | Bürste für einen Kommutator einer elektrischen Maschine |
DE10206498.9 | 2002-02-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003071637A1 true WO2003071637A1 (de) | 2003-08-28 |
Family
ID=27635035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003620 WO2003071637A1 (de) | 2002-02-16 | 2002-09-25 | Bürste für einen kommutator einer elektrischen maschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050077799A1 (de) |
EP (1) | EP1479134A1 (de) |
BR (1) | BR0208918A (de) |
DE (1) | DE10206498A1 (de) |
WO (1) | WO2003071637A1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH356520A (de) * | 1958-04-30 | 1961-08-31 | Wachendorf & Cie Schweiz Gummi | Bürstenhalter für elektrische Maschinen |
US5939812A (en) * | 1996-12-24 | 1999-08-17 | Robert Bosch Gmbh | Collector machine with housing contacting |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1629875A (en) * | 1921-04-20 | 1927-05-24 | Nat Carbon Co Inc | Pigtail connection for brushes |
US3489984A (en) * | 1966-12-27 | 1970-01-13 | Great Lakes Carbon Corp | Electrical connection between electrical conductors such as between a metal bar and a cathode of an aluminum cell |
US4075524A (en) * | 1976-07-01 | 1978-02-21 | Airco, Inc. | Brush shunt connection |
US5171942A (en) * | 1991-02-28 | 1992-12-15 | Southwire Company | Oval shaped overhead conductor and method for making same |
JP2850768B2 (ja) * | 1994-09-30 | 1999-01-27 | アスモ株式会社 | ブラシ装置 |
-
2002
- 2002-02-16 DE DE10206498A patent/DE10206498A1/de not_active Withdrawn
- 2002-09-25 EP EP02774410A patent/EP1479134A1/de not_active Withdrawn
- 2002-09-25 BR BR0208918-1A patent/BR0208918A/pt not_active IP Right Cessation
- 2002-09-25 US US10/500,669 patent/US20050077799A1/en not_active Abandoned
- 2002-09-25 WO PCT/DE2002/003620 patent/WO2003071637A1/de not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH356520A (de) * | 1958-04-30 | 1961-08-31 | Wachendorf & Cie Schweiz Gummi | Bürstenhalter für elektrische Maschinen |
US5939812A (en) * | 1996-12-24 | 1999-08-17 | Robert Bosch Gmbh | Collector machine with housing contacting |
Also Published As
Publication number | Publication date |
---|---|
EP1479134A1 (de) | 2004-11-24 |
US20050077799A1 (en) | 2005-04-14 |
DE10206498A1 (de) | 2003-08-28 |
BR0208918A (pt) | 2004-04-20 |
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