EP1747606B1 - Carbon brush for an electric machine - Google Patents
Carbon brush for an electric machine Download PDFInfo
- Publication number
- EP1747606B1 EP1747606B1 EP05729618A EP05729618A EP1747606B1 EP 1747606 B1 EP1747606 B1 EP 1747606B1 EP 05729618 A EP05729618 A EP 05729618A EP 05729618 A EP05729618 A EP 05729618A EP 1747606 B1 EP1747606 B1 EP 1747606B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon brush
- carbon
- bearing
- section
- commutator
- 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.)
- Not-in-force
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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
- H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder
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- 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 carbon brush for an electric machine according to the preamble of claim 1.
- a carbon brush is pivotally mounted on a brush holder of the electric machine.
- the carbon brush is mounted in a plastic part, which in turn is pivotally mounted on the brush holder.
- the position of the contact area of the carbon brush with the commutator can change greatly due to the temperature coefficient of the plastic.
- parts made of metal, weight and costs increase.
- Another type of pivotable carbon brushes are hammer brushes, wherein the carbon brush is attached to a leaf spring.
- the power is supplied via a wire or directly via the leaf spring, which is welded to the carbon brush.
- Manufacturing tolerances can cause a height offset between the carbon brush and the ideal contact height at the commutator. Noise development can not be excluded. From the DE-A-2812214 a carbon brush for an electric machine with the features of the preamble of claim 1 is known.
- the carbon brush for an electrical machine with the features of claim 1 has the advantage that the position of the carbon brush to the commutator does not change very strong even with strong temperature fluctuations. Furthermore, the carbon brush can be well positioned in a brush holder, which ensures an accurate assignment to the commutator.
- a carbon brush for an electric machine for pivotable mounting on a brush holder of the electric machine is provided, wherein on the coal itself, a bearing portion for pivotally supporting the coal is formed.
- the spring is attached to the pivot arm and passes over an arcuate portion in a spring arm, which extends substantially along the pivot arm in the direction of the bearing portion.
- a simple implementation of the carbon brush is given if adjoins the bearing portion of the carbon brush, a pivot arm, of which a support portion for support protrudes transversely on a commutator of a commutator motor or a slip ring of a generator.
- the carbon brush can be attached to a brush holder, which extends parallel to the shaft of an electric machine.
- bearing portion Simple embodiments of the bearing portion are possible if it is designed as a cylindrical portion for receiving in a bearing shell or if it has a bore for receiving a bearing pin.
- an electrical pigtail is attached to the pivot arm or the support section, as this favorable electrical connections are possible.
- Brush holder with bearings for the pivotal mounting of carbon brushes and with such carbon brushes on which even bearing sections are formed, which are accommodated in the camps, are inexpensive.
- the brush holder has bearing shells or pins on which the carbon brushes are mounted, which allows a cost-effective manner of storage.
- An electric machine with such carbon brushes or such a brush holder is inexpensive in construction and has a good noise performance.
- an electric motor 10 which may also be a generator, simplified in a longitudinal section shown.
- the electric motor 10 can be used in a motor vehicle, for example in a window regulator, wiper drive, blower, etc.
- the electric motor 10 comprises a housing 12 and an armature 14 arranged therein.
- the armature 14 has a shaft 16 and an armature package 1 7 with an armature winding, not shown.
- the armature winding is connected via wires 18 to a commutator 20.
- the commutator 20 is acted on the circumference of two carbon brushes 22 on two radially opposite sides.
- the carbon brushes 22 are arranged on a brush holder 24.
- the commutator 20, the carbon brushes 22 and the brush holder 24 form a commutation device 26.
- the commutation device 26 is shown in a side view from the left in relation to the longitudinal section of FIG.
- the brush holder 24, which is preferably made of plastic, extends substantially parallel to the shaft 16, which is not shown in detail in Figure 2; however, it may also extend perpendicular to the shaft 16.
- the brush holder 24 has two bearings in the form of pins 28, which extend parallel to the commutator axis, for the pivotable mounting of the carbon brushes 22.
- the distance of the pins 28 from each other is preferably at least as large as the diameter of the commutator 20.
- the distance of the pins 28 to the commutator axis is at least 1.5 times the Kommutatorradius. As a result, no premature wear of the carbon brush 20 occurs.
- bearing sections are formed in the form of holes 30 which are plugged onto the pins 28.
- the bearing portions are integrally formed with the carbon brushes 22.
- each have a pivot arm 32 connects.
- the length of the pivot arm 32 preferably corresponds approximately to the radius of the commutator 20.
- the length of the pivot arm 32 is dimensioned so that support portions 34 for resting on the commutator 20 of the two carbon brushes 22 are diametrically opposed to the commutator 20.
- the respective support region 34 projects transversely or diagonally from the pivot arm 32 and has a shorter length than the pivot arm 32.
- the cross-sectional area of the carbon brush 22 is rectangular, preferably square.
- two slots 36 or recesses are formed on the carbon brushes, which are perpendicular to the holes 30.
- Spring arms 38 are arranged in the slots 36.
- the spring arms 38 act on the carbon brushes 22 so that they are pressed against the commutator 20.
- the carbon brushes 22 are shown in a position they occupy when the commutator 20 is absent.
- the spring arms 38 are preferably integrally formed on the brush holder 24, made of plastic and lie in a plane. It is advantageous if they are directed towards each other. As a result, a space-saving arrangement is given as if they are directed away from each other.
- a stranded wire 40 is still attached to the carbon brushes 22 for electrical contacting.
- the strand 40 is preferably welded to the pivot arm 32, in particular electrically welded.
- the carbon brushes 22 are placed on the pins 28. At the same time, the spring arms 38 are inserted into the slots 36. As a result, then the angular position of the carbon brushes 22 is secured and optionally an intermediate storage possible.
- the commutation device 26 is pressed with the carbon brushes 22 ahead against the commutator 20. As a result, the carbon brushes 22 are pressed apart until the commutation device 26 reaches its end position.
- both carbon brushes 22.1, 22.2 have a kind of storage in common, which differs from the previously described.
- the carbon brushes 22.1 and 22.2 instead of a bore 30, the carbon brushes 22.1 and 22.2 as a bearing section on a cylindrical portion 42 for receiving in a bearing shell 44, wherein the bearing portions integral with the carbon brushes 22.1, 22.2 or integrally formed therewith.
- the longitudinal axis of the zyhnderförmigen portion 42 is parallel to the commutator axis.
- the bearing shell 44 is designed so that on the one hand the carbon brushes 22.1 and 22.2 can be mounted via a snap or clip connection.
- the carbon brushes 22.1 and 22.2 can be pivoted sufficiently.
- the carbon brushes 22.1 and 22 also have a pivoting arm 32 and a support region 34, the dimensions of which correspond to those of the carbon brush 22 of FIG.
- a storage according to Figure 2 is also possible here.
- a spring 46.1 or 46.2 for applying a compressive force to the pivot arm 32 or the support portion 34 is attached.
- Both springs 46.1 are preferably made of resilient flat steel. Both springs 46.1 and 46.2 have been attached to the pivot arm 32 and go over an arcuate portion 48.1 and 48.2 in a spring arm 50.1 and 50.2, which extends substantially along the pivot arm 32 in the direction of the bearing shells 44.
- the spring 46.1 is connected via a pin 52 with the carbon brush 22.
- the spring 46.2 is welded to the pivot arm 32 of the carbon brush 22. This makes this part easy to prefabricate and handle.
- the spring arms 50.1 and 50.2 of the springs 46.1 and 46.2 are inserted into receiving bores 54 of the brush holder 56, in which they are supported on the brush holder 56. This training allows that at the same time the suspension and the power supply is ensured.
- FIG. 4 shows another commenting device with an annular brush holder 58.
- the brush holder 58 can be mounted axially on a shaft 16 with the commutator 20.
- two further carbon brushes 22.3 are pivotally mounted.
- the carbon brushes 22.3 essentially have a shape corresponding to the carbon brushes 22.1, 22.2. That is, they also have a cylindrical portion 42, a pivot arm 32 and a support portion 34.
- a leg spring or torsion spring 60 is disposed on the bearing shell 44 in addition to the cylindrical portion 42.
- the central portion 62 of the torsion spring 60 which is preferably helically wound, is in this case
- the length of the bearing shell 44 is dimensioned so that they can accommodate the cylindrical portion 42 and the central portion 62, if they are arranged one behind the other.
- a pin about which the central portion 62 of the torsion spring 60 is arranged may be provided on the cylindrical portion 42, a pin about which the central portion 62 of the torsion spring 60 is arranged.
- the illustration in Figure 4 is the same in the case. This also applies to a storage with pins 28 of Figure 2.
- a first leg 64 of the torsion spring 60 is supported on the bearing shell 44 or another component.
- a second leg 66 abuts on the pivot arm 32 such that the torsion spring 60 presses the support region 34 against the commutator 20 when the brush holder 58 is mounted.
- the torsion spring 60 which may be mounted on bearings in the form of the pins 28, the bearing shells 44 or even the Kohlbebürsten 22.3 itself, allows a comparatively simple structure.
- the power supply is possible via strands 40, as shown in Figure 2, or may also be via torsion springs 60 when they are welded, for example, to the carbon brushes 22.3.
- the leg 64 can then be used for example as a connector.
- the bearing sections which are formed on the carbon brushes 22, 22.1, 22.2, 223 themselves or integrally or integrally with these, allow the elimination of additional components for the pivotal mounting of the carbon brushes 22, 22.1, 22.2, 22.3, such as leaf springs in hammer brushes or plastic holder ,
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- Motor Or Generator Current Collectors (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
Die Erfindung geht aus von einer Kohlebürste für eine elektrische Maschine nach dem Oberbegriff des Patentanspruchs 1. Eine derartige Kohlebürste ist schwenkbar an einem Bürstenhalter der elektrischen Maschine gelagert. Allerdings ist die Kohlebürste in einem Teil aus Kunststoff gelagert, das seinerseits schwenkbar an dem Bürstenhalter gelagert ist. Bei großen Temperaturschwankungen kann sich die Position des Auflagebereichs der Kohlebürste zum Kommutator aufgrund des Temperaturkoeffizienten des Kunststoffs stark ändern. Verwendet man Teile aus Metall, steigen Gewicht und Kosten.The invention relates to a carbon brush for an electric machine according to the preamble of claim 1. Such a carbon brush is pivotally mounted on a brush holder of the electric machine. However, the carbon brush is mounted in a plastic part, which in turn is pivotally mounted on the brush holder. In the case of large temperature fluctuations, the position of the contact area of the carbon brush with the commutator can change greatly due to the temperature coefficient of the plastic. Using parts made of metal, weight and costs increase.
Eine andere Art verschwenkbarer Kohlebürsten sind Hammerbürsten, wobei die Kohlebürste an einer Blattfeder befestigt ist. Die Stromzuführung erfolgt über eine Litze oder direkt über die Blattfeder, welche mit der Kohlenbürste verschweißt ist. Durch Fertigungstoleranzen kann es zu einem Höhenversatz zwischen der Kohlenbürste und der idealen Kontakthöhe am Kommutator. Geräuschentwicklungen können dadurch nicht ausgeschlossen werden. Aus der
Die Kohlebürste für eine elektrische Maschine mit den Merkmalen des Patentanspruchs 1 hat den Vorteil, dass die Position der Kohlebürste zum Kommutator auch bei starken Temperaturschwankungen sich nicht besonders stark ändert. Ferner lässt sich die Kohlenbürste in einem Bürstenhalter gut positionieren, was eine genaue Zuordnung zum Kommutator gewährleistet. Hierfür ist eine Kohlebürste für eine elektrische Maschine zur schwenkbaren Lagerung an einem Bürstenhalter der elektrischen Maschine vorgesehen, wobei an der Kohle selbst ein Lagerabschnitt zur schwenkbaren Lagerung der Kohle ausgebildet ist.The carbon brush for an electrical machine with the features of claim 1 has the advantage that the position of the carbon brush to the commutator does not change very strong even with strong temperature fluctuations. Furthermore, the carbon brush can be well positioned in a brush holder, which ensures an accurate assignment to the commutator. For this purpose, a carbon brush for an electric machine for pivotable mounting on a brush holder of the electric machine is provided, wherein on the coal itself, a bearing portion for pivotally supporting the coal is formed.
Greift eine Feder zur Aufbringung einer Druckkraft auf den Auflageabschnitt an dem Schwenkarm oder dem Auflageabschnitt an, so ergeben sich gute Hebelverhältnisse, wodurch die Feder nicht so stark sein muss. Erfindungsgemäß ist die Feder am Schwenkarm befestigt und geht über einen bogenförmigen Abschnitt in einen Federarm über, der sich im Wesentlichen entlang des Schwenkarms in Richtung des Lagerabschnitts erstreckt.If a spring acts on the swivel arm or on the support section in order to apply a compressive force to the support section, good leverage results, whereby the spring does not have to be so strong. According to the invention, the spring is attached to the pivot arm and passes over an arcuate portion in a spring arm, which extends substantially along the pivot arm in the direction of the bearing portion.
Eine einfache Umsetzung der Kohlebürste ist gegeben, wenn sich an den Lagerabschnitt der Kohlebürste ein Schwenkarm anschließt, von dem ein Auflageabschnitt zur Auflage an einem Kommutator eines Kommutatormotors oder einem Schleifring eines Generators quer absteht.A simple implementation of the carbon brush is given if adjoins the bearing portion of the carbon brush, a pivot arm, of which a support portion for support protrudes transversely on a commutator of a commutator motor or a slip ring of a generator.
Entspricht die Länge des Schwenkarms im Wesentlichen dem Radius des Kommutators oder Schleiüings, so kann die Kohlebürste an einen Bürstenhalter angebaut werden, der sich parallel zur Welle einer elektrischen Maschine erstreckt.Corresponds to the length of the pivot arm substantially the radius of the commutator or Schleiüings, the carbon brush can be attached to a brush holder, which extends parallel to the shaft of an electric machine.
Einfache Ausbildungen des Lagerabschnitts sind möglich, wenn er als ein zylinderförmiger Abschnitt zur Aufnahme in einer Lagerschale ausgebildet ist oder wenn er eine Bohrung zur Aufnahme eines Lagerstifts aufweist.Simple embodiments of the bearing portion are possible if it is designed as a cylindrical portion for receiving in a bearing shell or if it has a bore for receiving a bearing pin.
Vorzugsweise ist an dem Schwenkarm oder dem Auflageabschnitt eine elektrische Anschlusslitze befestigt, da dadurch günstige elektrische Anbindungen möglich sind.Preferably, an electrical pigtail is attached to the pivot arm or the support section, as this favorable electrical connections are possible.
Bürstenhalter mit Lagern zur schwenkbaren Lagerung von Kohlebürsten und mit derartigen Kohlebürsten, an denen selbst Lagerabschnitte ausgebildet sind, die in den Lagern aufgenommen sind, sind kostengünstig. Der Bürstenhalter hat Lagerschalen oder Stifte, an denen die Kohlebürsten gelagert sind, was eine kostengünstige Art der Lagerung ermöglicht.Brush holder with bearings for the pivotal mounting of carbon brushes and with such carbon brushes on which even bearing sections are formed, which are accommodated in the camps, are inexpensive. The brush holder has bearing shells or pins on which the carbon brushes are mounted, which allows a cost-effective manner of storage.
Vorzugsweise stützen sich an den Kohlebürsten befestigte Federn am Bürstenhalter ab, was einen kompakten Aufbau ergibt.Preferably, fastened to the carbon brush springs based on the brush holder, resulting in a compact design.
Eine elektrische Maschine mit derartigen Kohlebürsten oder einem derartigen Bürstenhalter ist kostengünstig im Aufbau und hat ein gutes Geräuschverhalten.An electric machine with such carbon brushes or such a brush holder is inexpensive in construction and has a good noise performance.
Weitere Vorteile und vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen und der Beschreibung.Further advantages and advantageous developments emerge from the subclaims and the description.
Ein Ausfiihrungsbeispiel ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Bei den Ausführungsbeispielen der Figuren 2 und 4 handelt es sich nicht um Ausführungsformen der Erfindung, sondern um Beispiele, die das Verständnis der Erfindung erleichtern. Es zeigen:
- Figur 1
- einen Elektromotor im Längsschnitt,
- Figur 2
- eine erste Kommutierungsvorrichtung des Elektromotors,
- Figur 3
- eine zweite Kommutierungsvorrichtung und
- Figur 4
- eine dritte Kommutierungsvornchtung .
- FIG. 1
- an electric motor in longitudinal section,
- FIG. 2
- a first commutation device of the electric motor,
- FIG. 3
- a second commutation device and
- FIG. 4
- a third Kommutierungsvornchtung.
In der Figur 1 ist ein Elektromotor 10, wobei es sich auch um einen Generator handeln kann, vereinfacht in einem Längsschnitt dargestellt. Der Elektromotor 10 kann in einem Kraftfahrzeug beispielsweise in einem Fensterheber, Wischerantrieb, Gebläse etc. verwendet werden. Der Elektromotor 10 umfasst ein Gehäuse 12 und einen darin angeordneten Anker 14. Der Anker 14 weist eine Welle 16 und ein Ankerpaket 1 7 mit einer nicht näher dargestellten Ankerwicklung auf. Die Ankerwicklung ist über Drähte 18 mit einem Kommutator 20 verbunden. Der Kommutator 20 wird am Umfang von zwei Kohlebürsten 22 an zwei radial gegenüberliegenden Seiten beaufschlagt. Die Kohlebürsten 22 sind auf einem Bürstenhalter 24 angeordnet. Der Kommutator 20, die Kohlebürsten 22 und der Bürstenhalter 24 bilden eine Kommutierungsvorrichtung 26.In the figure 1, an
In der Figur 2 ist die Kommutierungsvorrichtung 26 in bezug auf den Längsschnitt der Figur 1 in einer Seitenansicht von links dargestellt. Der Bürstenhalter 24, der vorzugsweise aus Kunststoff besteht, erstreckt sich im Wesentlichen parallel zur Welle 16, die in der Figur 2 nicht näher dargestellt ist; jedoch kann er sich auch senkrecht zur Welle 16 erstrecken. Der Bürstenhalter 24 weist zwei Lager in Form von Stiften 28, die sich parallel zur Kommutatorachse erstrecken, zur schwenkbaren Lagerung der Kohlebürsten 22 auf. Der Abstand der Stifte 28 voneinander ist vorzugsweise mindestens so groß wie der Durchmesser des Kommutators 20. Der Abstand der Stifte 28 zur Kommutatorachse beträgt mindestens das 1,5-fache des Kommutatorradius. Dadurch tritt keine frühzeitige Abnutzung der Kohlebürste 20 auf.In FIG. 2, the
An den Kohlebürsten 22 selbst sind Lagerabschnitte in Form von Bohrungen 30 ausgebildet, die auf die Stifte 28 gesteckt sind. Anders ausgedrückt sind die Lagerabschnitte einstückig mit bzw. integral an den Kohlebürsten 22 ausgebildet.On the
An die Lagerabschnitte bzw. Bohrungen 30 schließt sich jeweils ein Schwenkarm 32 an. Die Länge des Schwenkarms 32 entspricht vorzugsweise in etwa dem Radius des Kommutators 20. Die Länge des Schwenkarms 32 ist so bemessen, dass Auflagebereiche 34 zur Auflage am Kommutator 20 der beiden Kohlebürsten 22 sich am Kommutator 20 diametral gegenüberliegen. Der jeweilige Auflagebereich 34 steht quer bzw. diagonal vom Schwenkarm 32 ab und hat eine kürzere Länge als der Schwenkarm 32. Die Querschnittsfläche der Kohlebürste 22 ist rechteckig, vorzugsweise quadratisch.At the bearing sections or
Im Bereich der Lagerung sind an den Kohlebürsten 22 zwei Schlitze 36 oder Ausnehmungen ausgebildet, die senkrecht auf den Bohrungen 30 stehen. In den Schlitzen 36 sind Federarme 38 angeordnet Die Federarme 38 beaufschlagen die Kohlebürsten 22 so, dass sie an den Kommutator 20 gedrückt werden. Zur Veranschaulichung sind die Kohlebürsten 22 in einer Position gezeigt, die sie einnehmen, wenn der Kommutator 20 nicht vorhanden ist. Die Federarme 38 sind vorzugsweise einstückig am Bürstenhalter 24 angeformt, aus Kunststoff und liegen in einer Ebene. Es ist vorteilhaft, wenn sie aufeinander gerichtet sind. Dadurch ist eine platzsparendere Anordnung gegeben als wenn sie voneinander weggerichtet sind.In the area of the
Schließlich ist zur elektrischen Kontaktierung an den Kohlebürsten 22 noch jeweils eine Litze 40 befestigt. Die Litze 40 ist vorzugsweise am Schwenkarm 32 angeschweißt, insbesondere elektrisch verschweißt.Finally, a stranded
Zur Montage der Kommutierungsvorrichtung 26 werden die Kohlebürsten 22 auf die Stifte 28 gesteckt. Gleichzeitig werden die Federarme 38 in die Schlitze 36 eingeführt. Dadurch ist danach die Winkelposition der Kohlebürsten 22 gesichert und gegebenenfalls eine Zwischenlagerung möglich. Zur Montage wird die Kommutierungsvorrichtung 26 mit den Kohlebürsten 22 voran gegen den Kommutator 20 gedrückt. Dadurch werden die Kohlebürsten 22 auseinandergedrückt, bis die Kommutierungsvorrichtung 26 ihre Endlage erreicht.For mounting the
In der Figur 3 sind zwei leicht abgewandelte Kohlebürsten 22.1 und 22.2 gezeigt. Beide Kohlebürsten 22.1, 22.2 haben eine Art der Lagerung gemeinsam, die sich von der zuvor geschilderten unterscheidet. Statt einer Bohrung 30 weisen die Kohlebürsten 22.1 und 22.2 als Lagerabschnitt einen zylinderförmiger Abschnitt 42 zur Aufnahme in einer Lagerschale 44 auf, wobei die Lagerabschnitte einstückig mit den Kohlebürsten 22.1, 22.2 bzw. integral mit diesen ausgebildet ist. Die Längsachse des zyhnderförmigen Abschnitts 42 ist parallel zur Kommutatorachse. Die Lagerschale 44 ist so ausgebildet, dass einerseits die Kohlebürsten 22.1 und 22.2 über eine Rast- bzw. Clipsverbindung montiert werden können. Andererseits können die Kohlebürsten 22.1 und 22.2 ausreichend verschwenkt werden. Die Kohlebürste 22.1 und 22. haben ebenfalls einen Schwenkarm 32 und einen Auflagebereich 34, deren Ausmaße denen der Kohlebürste 22 der Figur 2 entsprechen. Natürlich ist auch hier eine Lagerung gemäß Figur 2 möglich.In the figure 3, two slightly modified carbon brushes 22.1 and 22.2 are shown. Both carbon brushes 22.1, 22.2 have a kind of storage in common, which differs from the previously described. Instead of a
An beiden Kohlebürsten 22.1 und 22.2 ist eine Feder 46.1 bzw. 46.2 zur Aufbringung einer Druckkraft an dem Schwenkarm 32 oder dem Auflageabschnitt 34 angebracht. Beide Federn 46.1 sind vorzugsweise aus federndem Flachstahl. Beide Federn 46.1 und 46.2 haben sind am Schwenkarm 32 befestigt und gehen über einen bogenförmigen Abschnitt 48.1 bzw. 48.2 in einen Federarm 50.1 und 50.2 über, der sich im Wesentlichen entlang des Schwenkarms 32 in Richtung der Lagerschalen 44 erstreckt. Die Feder 46.1 ist über einen Stift 52 mit der Kohlebürste 22 verbunden. Die Feder 46.2 ist am Schwenkarm 32 der Kohlebürste 22 angeschweißt. Dadurch lässt sich dieses Teil leicht vorfertigen und handhaben. Die Federarme 50.1 und 50.2 der Federn 46.1 und 46.2 sind in Aufnahmebohrungen 54 des Bürstenhalters 56 gesteckt, in denen sie sich am Bürstenhalter 56 abstützen. Diese Ausbildung ermöglicht es, dass gleichzeitig die Federung und die Stromversorgung gewährleistet ist.At both carbon brushes 22.1 and 22.2, a spring 46.1 or 46.2 for applying a compressive force to the
In der Figur 4 ist eine weitere Kommentierungsvorrichtung mit einem ringförmigen Bürstenhalter 58 dargestellt. Der Bürstenhalter 58 kann axial auf eine Welle 16 mit dem Kommutator 20 montiert werden. An zwei sich diametral gegenüberliegenden Lagerschalen 44, die an einer der Stirnseiten des Bürstenhalter 58 angeordnet sind, sind zwei weitere Kohlebürsten 22.3 schwenkbar gelagert. Die Kohlebürsten 22.3 haben im Wesentlichen eine Gestalt, die den Kohlebürsten 22.1, 22.2 entspricht. Das heißt sie haben ebenfalls einen zylinderförmigen Abschnitt 42, einen Schwenkarm 32 und einen Auflagebereich 34. An der Lagerschale 44 ist jedoch zusätzlich zum zylinderförmigen Abschnitt 42 eine Schenkelfeder bzw. Drehfeder 60 angeordnet. Der Mittelabschnitt 62 der Drehfeder 60, der vorzugsweise schraubenlinienförmig gewunden ist, ist hierbei in der Lagerschale 44 angeordnet Hierzu ist die Länge der Lagerschale 44 so bemessen, dass sie den zylinderförmigen Abschnitt 42 und den Mittelabschnitt 62, wenn sie hintereinander angeordnet sind, aufnehmen kann. Natürlich kann am zylinderförmigen Abschnitt 42 ein Zapfen vorgesehen sein, um den der Mittelabschnitt 62 der Drehfeder 60 angeordnet ist. Die Darstellung in der Figur 4 ist in dem Fall die gleiche. Dies trifft ebenfalls auf eine Lagerung mit Stiften 28 der Figur 2 zu.FIG. 4 shows another commenting device with an
Ein erster Schenkel 64 der Drehfeder 60 stützt sich an der Lagerschale 44 oder einem sonstigen Bauteil ab. Ein zweiter Schenkel 66 liegt so am Schwenkarm 32 an, dass die Drehfeder 60 bei montiertem Bürstenhalter 58 den Auflagebereich 34 gegen den Kommutator 20 drückt.A
Die Drehfeder 60, die an Lagern in Form der Stifte 28, der Lagerschalen 44 oder auch den Kohlbebürsten 22.3 selbst gelagert sein kann, ermöglicht einen vergleichsweise einfachen Aufbau.The
Die Stromzuführung ist möglich über Litzen 40, wie in Figur 2 gezeigt, oder kann auch über Drehfedern 60, wenn diese beispielsweise an den Kohlebürsten 22.3 angeschweißt sind. Der Schenkel 64 kann dann beispielsweise als Anschlussstecker genutzt werden.The power supply is possible via
Die Lagerabschnitte, die an den Kohlebürsten 22, 22.1, 22.2, 223 selbst oder einstückig bzw. integral mit diesen ausgebildet sind, ermöglichen das Wegfallen zusätzlicher Bauteile zur schwenkbaren Lagerung der Kohlebürsten 22, 22.1, 22.2, 22.3, wie beispielsweise Blattfedern bei Hammerbürsten oder Kunststoffhalter.The bearing sections, which are formed on the carbon brushes 22, 22.1, 22.2, 223 themselves or integrally or integrally with these, allow the elimination of additional components for the pivotal mounting of the carbon brushes 22, 22.1, 22.2, 22.3, such as leaf springs in hammer brushes or plastic holder ,
Claims (9)
- Carbon brush (22.1, 22.2) for an electric machine (10) for the pivotable bearing arrangement on a brushholder (24, 56) of the electric machine (10), a bearing section (30, 42) for the pivotable bearing arrangement of the carbon brush (22.1, 22.2) being formed on the carbon brush (22.1, 22.2) itself, having a spring, the spring (46.1, 46.2) for applying a pressure force to a resting section (34) acting on a pivoting arm (32) or the resting section (34) of the carbon brush, characterized in that the spring (46.1, 46.2) is fixed to the pivoting arm (32) and merges with a spring arm (50.1, 50.2) via an arcuate section (48.1, 48.2), which spring arm extends substantially along the pivoting arm (32) in the direction of the bearing section (42).
- Carbon brush (22.1, 22.2) according to Claim 1, characterized in that the pivoting arm (32) adjoins the bearing section (30, 42) of the carbon brush (22.1, 22.2), from which pivoting arm the resting section (34) for resting on a commutator (20) of a commutator motor (10) or a slipring of a generator protrudes transversely.
- Carbon brush (22.1, 22.2) according to Claim 2, characterized in that the length of the pivoting arm (32) substantially corresponds at least to the radius of the commutator (20) or slipring.
- Carbon brush (22.1, 22.2) according to one of the preceding claims, characterized in that the bearing section (42) is in the form of a cylindrical section for accommodation in a bearing shell (44) or in that the bearing section (30) has a drilled hole for accommodating a bearing pin (28).
- Carbon brush according to one of the preceding claims, characterized in that an electrical pigtail lead (40) is fixed to the pivoting arm (32) or the resting section (34).
- Brushholder (24, 56) with bearings (28, 44) for the pivotable bearing arrangement of carbon brushes (22.1, 22.2) and with carbon brushes (22.1, 22.2) according to one of the preceding claims.
- Brushholder (24, 56) according to Claim 6, characterized in that the brushholder (24, 56) has bearing shells (44) or pins (28), on which the carbon brushes (22.1, 22.2) are mounted.
- Brushholder (56) according to Claim 6 or 7, characterized in that springs (46.1, 46.2, 60), which are fixed to the carbon brushes (22.1, 22.2, 22.3), are supported on the brushholder (56).
- Electric machine (10) with at least one carbon brush (22.1, 22.2) according to one of Claims 1 to 5 or a brushholder (24, 56) according to one of Claims 6 to 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05729618T PL1747606T3 (en) | 2004-05-12 | 2005-03-04 | Carbon brush for an electric machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004023398A DE102004023398A1 (en) | 2004-05-12 | 2004-05-12 | Carbon brush for an electric machine |
PCT/EP2005/050984 WO2005112205A1 (en) | 2004-05-12 | 2005-03-04 | Carbon brush for an electric machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1747606A1 EP1747606A1 (en) | 2007-01-31 |
EP1747606B1 true EP1747606B1 (en) | 2008-01-23 |
Family
ID=34963037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05729618A Not-in-force EP1747606B1 (en) | 2004-05-12 | 2005-03-04 | Carbon brush for an electric machine |
Country Status (8)
Country | Link |
---|---|
US (1) | US20080030099A1 (en) |
EP (1) | EP1747606B1 (en) |
CN (1) | CN100511877C (en) |
AT (1) | ATE385058T1 (en) |
DE (2) | DE102004023398A1 (en) |
ES (1) | ES2301002T3 (en) |
PL (1) | PL1747606T3 (en) |
WO (1) | WO2005112205A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110752494A (en) * | 2019-10-30 | 2020-02-04 | 哈尔滨电机厂有限责任公司 | Pressure equalizing type constant-pressure carbon brush supporting device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HUE041651T2 (en) * | 2011-12-02 | 2019-05-28 | Lakeview Innovation Ltd | Brush support for a brush commuted electric motor and electric motor |
WO2016095959A1 (en) * | 2014-12-16 | 2016-06-23 | Aktiebolaget Skf | Bearing arrangement |
DE102016225984A1 (en) * | 2016-12-22 | 2018-06-28 | Robert Bosch Gmbh | Brush holder for an electric machine |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3229135A (en) * | 1963-05-31 | 1966-01-11 | Cav Ltd | Brush assemblies for dynamoelectric machines |
DE1916392U (en) * | 1963-06-25 | 1965-05-26 | Ringsdorff Werke Gmbh | BRUSH HOLDER COMBINATION. |
DE1226702B (en) * | 1964-12-24 | 1966-10-13 | Ernst Weiss Dipl Kfm | Holding device for collector brushes of small and micro motors |
FR2022966A1 (en) * | 1968-11-09 | 1970-08-07 | Nippon Denso Co | |
DE2812214A1 (en) * | 1978-03-20 | 1979-09-27 | Siemens Ag | Brush holder for miniature DC motor - has lever brushes on pins, pressed by springs and held axially by parts of tags held in casing |
DE3023803A1 (en) * | 1980-06-25 | 1982-01-21 | Siemens AG, 1000 Berlin und 8000 München | COLLECTOR MOTOR |
CH673356A5 (en) * | 1986-04-14 | 1990-02-28 | Portescap | |
DE9207590U1 (en) * | 1992-06-04 | 1992-08-20 | Interelectric Ag, Sachseln | Lever brush for use in DC machines |
DE29605114U1 (en) * | 1996-03-19 | 1996-07-11 | Interelectric Ag, Sachseln | Brush cover for DC machines |
DE19904728A1 (en) * | 1999-02-05 | 2000-08-10 | Interelectric Ag Sachseln | Electric motor with a commutator |
JP3898942B2 (en) * | 2001-11-30 | 2007-03-28 | 並木精密宝石株式会社 | Brush device and motor with brush |
US6707220B1 (en) * | 2003-02-12 | 2004-03-16 | Siemens Vdo Automotive, Inc. | Electric motor brush holder for suppressing audible and electromagnetic noise |
-
2004
- 2004-05-12 DE DE102004023398A patent/DE102004023398A1/en not_active Withdrawn
-
2005
- 2005-03-04 EP EP05729618A patent/EP1747606B1/en not_active Not-in-force
- 2005-03-04 AT AT05729618T patent/ATE385058T1/en not_active IP Right Cessation
- 2005-03-04 ES ES05729618T patent/ES2301002T3/en active Active
- 2005-03-04 PL PL05729618T patent/PL1747606T3/en unknown
- 2005-03-04 US US11/587,437 patent/US20080030099A1/en not_active Abandoned
- 2005-03-04 DE DE502005002672T patent/DE502005002672D1/en active Active
- 2005-03-04 WO PCT/EP2005/050984 patent/WO2005112205A1/en active IP Right Grant
- 2005-03-04 CN CNB2005800151369A patent/CN100511877C/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110752494A (en) * | 2019-10-30 | 2020-02-04 | 哈尔滨电机厂有限责任公司 | Pressure equalizing type constant-pressure carbon brush supporting device |
Also Published As
Publication number | Publication date |
---|---|
US20080030099A1 (en) | 2008-02-07 |
EP1747606A1 (en) | 2007-01-31 |
DE102004023398A1 (en) | 2005-12-08 |
PL1747606T3 (en) | 2008-07-31 |
ES2301002T3 (en) | 2008-06-16 |
CN1954467A (en) | 2007-04-25 |
ATE385058T1 (en) | 2008-02-15 |
CN100511877C (en) | 2009-07-08 |
DE502005002672D1 (en) | 2008-03-13 |
WO2005112205A1 (en) | 2005-11-24 |
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