EP1935066A1 - Balai de charbon pour un moteur a courant continu - Google Patents

Balai de charbon pour un moteur a courant continu

Info

Publication number
EP1935066A1
EP1935066A1 EP06792932A EP06792932A EP1935066A1 EP 1935066 A1 EP1935066 A1 EP 1935066A1 EP 06792932 A EP06792932 A EP 06792932A EP 06792932 A EP06792932 A EP 06792932A EP 1935066 A1 EP1935066 A1 EP 1935066A1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
edge
commutator
motor
brush body
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
EP06792932A
Other languages
German (de)
English (en)
Other versions
EP1935066B1 (fr
Inventor
Gerald Kuenzel
Christof Bernauer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1935066A1 publication Critical patent/EP1935066A1/fr
Application granted granted Critical
Publication of EP1935066B1 publication Critical patent/EP1935066B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01R39/18—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 and a DC motor with such a carbon brush.
  • the invention relates to the field of mechanically commutated DC motors.
  • a carbon brush for a mechanically commutated DC motor is known.
  • the known carbon brush has a tread designed in such a way that two defined, as far apart as possible, substantially point or line bearing surfaces between the carbon brush and the contacting blades of the collector of the DC motor are present, the tread of the carbon brush is provided centrally with a recess , A contour of the carbon brush has an at least substantially V-shaped contour in the region of the running surface.
  • the carbon brush known from DE 44 38 868 C2 has the disadvantage that for a reliable operation either a very large extent of the tread and thus the entire carbon brush is required, which in addition to an increased use of material requires a larger size of the DC motor, or there is a risk in that, during operation of the DC motor, the carbon brush dips into a commutator slot with an edge delimiting the running surface.
  • the risk of immersion of the edge of the carbon brush in one of the commutator slots is particularly at an edge run, wherein the carbon brush is then thrown out of the Kommutatorschlitz at the edge due to the following edge of the next commutator. This requires excitation of the carbon brush and thus also of the entire motor structure with the frequency of the successive commutator slots and their harmonics. The subjective noise behavior of the DC motor is thereby audibly deteriorated.
  • the carbon brush according to the invention with the features of claim 1 and the DC motor according to the invention with the features of claim 10 have the advantage that a possible immersion of the brush body in commutator formed on a commutator slots or the like is reduced or prevented. As a result, in particular the noise behavior of a DC motor with a carbon brush according to the invention can be improved.
  • the commutator of the DC motor is not a part of the carbon brush claimed in claims 1 to 9 and that such a carbon brush can also be manufactured and sold alone without such a commutator.
  • the convex portion of the profile line in the region of an edge of the brush body is provided, wherein the convex portion can also adjoin the edge of Burstenkorpers.
  • a resting of the Burstenkorpers is achieved at the commutator in the region of the convex portion at least when crossing a Kommutatorschlitzes of the commutator, whereby a dipping of the edge of Burstenkorpers is substantially reduced or prevented in the Kommutatorschlitz.
  • the edge of the Burstenkorpers is rounded, wherein the convex portion of the profile line may include the edge of Burstenkorpers.
  • the profile line of the Burstenkorpers has at least one concave portion on which the Burstenkorper is configured concave.
  • the convex portion of the profile line may be provided closer to an edge of the Burstenkorpers closer than the concave portion.
  • Fig. 1 shows an embodiment of a DC motor with a carbon brush of the invention in an excerpted sectional view.
  • FIG. 3 is a carbon brush according to another embodiment in a simplified representation of several views.
  • Fig. 1 shows a DC motor 1 with a carbon brush 2 according to an embodiment of the invention.
  • the DC motor 1 can be configured in particular as a mechanically commutated DC motor 1.
  • the DC motor 1 is particularly suitable for power-operated adjustment of elements of a motor vehicle.
  • a preferred use of the DC motor 1 is a Wegverstellmotor for elements of a seat of a motor vehicle, in particular for driver and front passenger seats.
  • the DC motor 1 according to the invention and the carbon brush 2 according to the invention are also suitable for other applications.
  • the DC motor 1 has a carbon guide 3, in which the carbon brush 2 is guided. Furthermore, the DC motor 1 has a commutator 4, which comprises a plurality of commutator slots 5, 6. In Fig. 1, a situation is shown as it occurs when operating the DC motor 1, when the commutator 4 is operated in the direction of rotation 7.
  • the DC motor 1 can also be designed as a DC motor 1 with a reversible direction of rotation, so that the commutator 4 rotates counter to the direction of rotation 7 after a switching operation.
  • the commutator 4 has a plurality of commutator running surfaces 8, 9, 10, which are separated from one another by the commutator slots 5, 6. During the rotation of the commutator 4 in the direction of rotation 7, the carbon brush 2 first passes over the commutator surface 10, then via the commutator 9, as is the case in the instant shown in FIG. 1, and then via the commutator tread eighth
  • the carbon brush 2 has a running surface 15, which extends from an edge 16 to an edge 17 of the carbon brush 2.
  • a profile line 18 of the carbon brush 2 is defined, which extends at least approximately in the direction of rotation 7 on the running surface 15 and limits the profile of the carbon brush 2 shown in FIG.
  • the carbon brush 2 is symmetrical relative to a central axis 19, so that in addition to the tread 15 and the profile line 18 is configured symmetrically to the central axis 19.
  • the edge 16 is adjoined by a convex portion 20 of the profile line 18, on which the Burstenkorper 2 is configured convex.
  • the tread 15 of the Burstenkorpers 2 at the convex portion 20 is bulged or configured belly-shaped.
  • a concave portion 21 of the profile line 18 adjoins the convex portion 20, on which the Burstenkorper 2 of the carbon brush 2 is concave.
  • the tread 15 of the Burstenkorpers 2 in the region of the concave portion 21 is therefore mannuckgewolbt or hollow shape configured.
  • the Burstenkorper 2 in the region of the central axis 19 has a groove 22.
  • the convex portion 20 abuts directly on the concave portion 21, wherein the transition between the convex portion 20 and the concave portion 21, where the profile line 18 has a turning point, a distance 23 from the central axis 19 of the Burstenkorpers 2 has.
  • the edge 17 is rounded off, wherein an edge radius 24 is provided.
  • the convex portion of the profile line 18 in the region of the edge 17 is executed at least substantially with a radius 25, while the concave portion of the Profile line 18 in the region of the edge 17 with a radius 26 is executed.
  • the configuration of the Burstenkorpers 2 and in particular the profile line 18 of the Burstenkorpers 2 is adapted to the dimensions of the commutator slots 5, 6. In particular, an adaptation to the width 27 of the commutator slot 6 takes place.
  • the tread 15 of Burstenkorpers 2 includes with the edges 16, 17 and with bevels 29, 30 from.
  • the bevels 29, 30 serve as a tolerance compensation during the grinding process, so that a possible offset of the carbon brush 2 compensated to a grinding wheel or a form of fiber and thus the grinding of the entire tread 15 is guaranteed.
  • transitions of the individual regions that is, from the bevel 29 to the edge 16, from the edge 16 to the convex portion 20, from the convex portion 20 to the concave portion 21, from the concave portion 21 to the groove 22, from the groove 22 to the concave portion in FIG Area of the edge 17, from the concave portion in the region of the edge 17 to the convex portion in the region of the edge 17, from the convex portion in the region of the edge 17 to the edge 17 and from the edge 17 to the slope 30 are designed tangentenstetig.
  • the outlet of the bevels 29, 30 to the other Burstenkorper 2 in the coal trays 3 is not necessarily tangentenstetig configured and may have a kink.
  • Fig. 2 shows the Burstenkorper 2 from several views and a simplified grinding wheel 35 for producing the tread 15 of the Burstenkorpers 2.
  • the Burstenkorper 2 is designated in a front view
  • the Burstenkorper 2 from a designated B direction of view the Burstenkorper 2A
  • the Burstenkorper 2 is designated from a designated C direction of view on the Burstenkorpers 2A.
  • the Burstenkorper 2 has a through hole 36 which serves during the manufacture of the Burstenkorpers for holding the Burstenkorpers 2 and later for fixing the Burstenkorpers 2 in the Kohlezenung 3.
  • DC motor 1 is preferably a contact between the carbon brush 2 and the commutator 4 at the support points 40, 41.
  • the support point 40 is provided at least approximately at the transition between the convex portion 20 to the concave portion 21. The same applies to the support point 41st
  • FIG. 3 shows the Burstenkorper 2 from several views and the grinding wheel 35 for producing the tread 15.
  • the rotating in the direction of rotation 37 grinding wheel 35 in the feed direction 38 which is oriented parallel to the central axis 19, at least approximately centered moved to the tread 15.
  • a tread 15 extending at least substantially in the transverse direction 42 in the transverse direction 42 forms.
  • lateral, line-shaped support points 4 OA, 4OB, 41 A, 41 B are designed, on which during operation of the DC motor 1 preferably an electrical contact between the Burstenkorper 2 and the commutator 4 comes about.
  • the configuration shown in FIG. 1 is preferably fulfilled for each cut along the tread 15 in which the profile line 18 intersects the linear support points 40, 41 at least approximately perpendicularly.
  • this embodiment of the tread 15 is met at least for profile lines 18 which intersect the linienstuckformigen support points 4OA, 41A or the linienstuckformigen support points 4OB, 41B at least approximately perpendicular.
  • Each point of the support points 40, 41 or the support points 4OA, 4OB, 41A, 41B represents a contact point of the tread 15 on which an electrical contact between the Burstenkorper 2 and the commutator 4 of the DC motor 1 can be produced. In an edge run of the Burstenkorpers 2, however, this contact point can move in the direction of the edge 16 or the edge 17 or on one of the edges 16, 17.
  • FIG. 2 shows a section line 43 along which the section through the brush body 2 of the carbon brush 2 shown in FIG. 1 can be made. The profile line 18 then runs along the cutting line 43.
  • the profile line 18 can also run closer to a side 44 or to a side 45 of the brush body 2 and preferably parallel to the cutting line 43. In the exemplary embodiment illustrated in FIG. 3, the profile line 18 extends in the region of the side 44 or in the region of the side 45.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention concerne un balai de charbon (2) pour un moteur à courant continu (1). Le balai de charbon (2) selon l'invention comprend au moins un corps de balai (2) muni d'une surface de roulement (15), un contact électrique entre le corps de balai (2) et un commutateur (4) du moteur à courant continu (1) pouvant être établi au niveau d'un point de contact de cette surface de roulement (15). Une ligne profilée (18), s'étendant le long de la surface de roulement (15), du corps de balai (2) présente au moins un segment convexe (20) au niveau duquel le corps de balai (2) a une forme convexe. On réduit ainsi l'enfoncement d'une arête (16) du corps de balai (2) lors du franchissement d'une fente de commutateur (5, 6), ce qui permet d'éviter une éjection consécutive.
EP06792932.3A 2005-09-30 2006-08-22 Balai de charbon pour un moteur a courant continu Expired - Fee Related EP1935066B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510047083 DE102005047083A1 (de) 2005-09-30 2005-09-30 Kohlebürste für einen Gleichstormmotor
PCT/EP2006/065543 WO2007039349A1 (fr) 2005-09-30 2006-08-22 Balai de charbon pour un moteur a courant continu

Publications (2)

Publication Number Publication Date
EP1935066A1 true EP1935066A1 (fr) 2008-06-25
EP1935066B1 EP1935066B1 (fr) 2017-06-07

Family

ID=37232948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06792932.3A Expired - Fee Related EP1935066B1 (fr) 2005-09-30 2006-08-22 Balai de charbon pour un moteur a courant continu

Country Status (3)

Country Link
EP (1) EP1935066B1 (fr)
DE (1) DE102005047083A1 (fr)
WO (1) WO2007039349A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7768175B2 (en) 2007-08-02 2010-08-03 Jtekt Corporation Brush manufacturing method, motor manufacturing method, brush, motor, and electromotive power steering device
WO2014060035A1 (fr) * 2012-10-17 2014-04-24 Schleifring Und Apparatebau Gmbh Balai de bague collectrice à densité de courant régulée

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485049A (en) * 1994-05-25 1996-01-16 United Technologies Motor Systems, Inc. Multi-speed motor
DE19650245A1 (de) * 1996-12-04 1998-06-10 Mannesmann Vdo Ag Kohlebürste, zur Kontaktierung eines sich drehenden, mehrere Lamellen aufweisenden Kollektors eines Elektromotors
GB2422252A (en) * 2005-01-14 2006-07-19 Johnson Electric Sa Leading/trailing electric motor brush edge profiles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007039349A1 *

Also Published As

Publication number Publication date
WO2007039349A1 (fr) 2007-04-12
DE102005047083A1 (de) 2007-04-05
EP1935066B1 (fr) 2017-06-07

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