EP1761977A1 - Hammer brush for an electric machine - Google Patents

Hammer brush for an electric machine

Info

Publication number
EP1761977A1
EP1761977A1 EP05752513A EP05752513A EP1761977A1 EP 1761977 A1 EP1761977 A1 EP 1761977A1 EP 05752513 A EP05752513 A EP 05752513A EP 05752513 A EP05752513 A EP 05752513A EP 1761977 A1 EP1761977 A1 EP 1761977A1
Authority
EP
European Patent Office
Prior art keywords
brush
hammer
arm
brush holder
brushes
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
EP05752513A
Other languages
German (de)
French (fr)
Other versions
EP1761977B1 (en
Inventor
Robert Heitz
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
Priority to PL05752513T priority Critical patent/PL1761977T3/en
Publication of EP1761977A1 publication Critical patent/EP1761977A1/en
Application granted granted Critical
Publication of EP1761977B1 publication Critical patent/EP1761977B1/en
Not-in-force 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
    • H01R39/38—Brush holders
    • H01R39/381—Brush holders characterised by the application of pressure to brush
    • 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

Definitions

  • the invention relates to a hammer brush for an electric machine according to the preamble of claim 1.
  • a hammer brush for pivotal mounting on a brush holder of the electric machine usually has two
  • Leaf springs comprising a fixing portion for anchoring to the brush holder, an adjoining the attachment portion arm, to which a carbon brush is attached, and an angled at the end of the arm to the attachment portion portion. To ensure the required contact force of the coal to the commutator, a bias of the hammer brushes is required. At the radial
  • the preloaded hammer brushes are widened with trained as mating sections, which are supported on the commutator. This results in a high buckling load for the leaf springs of the hammer brushes, especially at the first touch of the joining aid with the commutator. The surface of the commutator can be damaged.
  • the hammer brush for an electric machine with the features of claim 1 has the advantage that simplifies the assembly of the hammer brush holder, improves the positioning of the coal to the commutator and the spring force tolerances is narrowed.
  • a hammer brush for pivotal mounting on a brush holder of an electric machine is provided with a leaf spring, wherein the leaf spring has a fixing portion for anchoring to the brush holder, an adjoining the attachment portion arm, on the one
  • Carbon brush is attached, and comprises an angled at the end of the arm to the fastening portion out resilient portion, wherein the portion is angled to the side facing away from the carbon brush side of the arm.
  • the resilient portion is angled at least at an acute angle to the arm. This results in more precisely defined spring forces.
  • the arm and the resilient portion are connected to each other via an arc.
  • a brush holder with two arranged on the brush holder, projecting from the brush holder hammer brushes, wherein the carbon brushes facing each other and the resilient portions facing away from each other, can be easily assembled.
  • the arms when the arms are not mounted, they are arranged substantially parallel to each other.
  • the contact force on a commutator during assembly is very low and is applied only towards the end of the assembly process.
  • This assembly simplification also affects an electric machine with at least one such hammer brush.
  • the brush holder is arranged with the hammer brushes in a recess in front, wherein the hammer brushes abut a commutator arranged in the recess and wherein the recess has two side walls, against which the resilient portions ,
  • the assembly can be simplified if on the side walls joining bevels are formed for the resilient portions of the arms.
  • FIG. 1 shows an electric motor in longitudinal section
  • 2 shows a commutation device of the electric motor according to the section line 11-11 in FIG. 2
  • FIG. 3 shows the commutating device from FIG. 2 in the assembly position.
  • 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 Wegversteller, windows, wiper drive, blowers, 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 17 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 periphery of two hammer brushes 22 on two radially opposite sides.
  • the hammer brushes 22 are arranged on a brush holder 24.
  • the commutator 20, the hammer brushes 22 and the brush holder 24 form a commutation device 26.
  • the commutator 20 and partially the hammer brushes 22 are arranged in a recess 28, which may be located for example in a transmission housing.
  • 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 is arranged in the recess 28 with the hammer brush 22 ahead.
  • the hammer brushes 22 abut with carbon brushes 30 on the commutator 20 arranged in the recess.
  • the hammer brushes 22 in turn bear against two mutually parallel side walls 32 of the recess 28.
  • the side walls 32 each have at their outer edge facing each other serving as a joining aids chamfers 34th
  • the hammer brushes 22 for pivotable mounting on the brush holder 24 each include a leaf spring 36.
  • Each leaf spring 36 includes a mounting portion 38, is anchored to the brush holder 24.
  • the power supply of the hammer brush 22 takes place via the attachment section 38 or additional strands.
  • An arm 40 in the form of a leaf spring connects to the attachment section 38.
  • On the arm 40 and the carbon brush 30 is attached.
  • Preferably via an arc 42 with a 1 to 3 millimeter radius is followed by the arm 40 at the end of an attachment portion 38 and the brush holder 24 toward or in the direction angled resilient portion 44.
  • the angled portion 44 is in the unassembled state ( Figure 3) at an acute angle of 5 to 25 ° to the arm 40 angled.
  • the resilient portion 44 is angled away from the side facing away from the carbon brush 30 side of the arm 40 out. At the end of the angled portion 44 approximately at the level of the carbon brush 30 is a weggewölbter from the arm 40, preferably arcuate, area 46 is formed. The area 46 essentially corresponds to a semicircle.
  • a stiffener 48 is present between the attachment portion 38 and the bow 42.
  • the stiffener 48 may be formed as a bead or as the two edge of the rope along the arm 40 may be angled. Also, a plate may be welded, for example.
  • the arms 40 are arranged substantially parallel to each other at least in the unassembled state.
  • the carbon brushes 30 are facing each other and the resilient portions 44 face away from each other.
  • the arms 40 are used to pre-position the carbon brushes 30.
  • the angled portions 44 are first compressed by means of the arcuate portions 46 coming into contact with the chamfers 34 and tensioned. This can be done so that the carbon brushes 30 are pressed radially only to the commutator 20 without tangentially along this. As a result, the surface is not scratched. However, it may be permissible for the carbon brushes 30 to drag somewhat along the surface of the commutator 20.
  • the arms 40 are pivoted only by the positional offset between the commutator 20 and the brush holder 24, which is why the stiffeners can be provided so well prevent a disturbing tilting of the carbon brushes 30, which can be initiated by the torque due to the spring force
  • the hammer brushes 22 can also be arranged in the recess 28 itself.
  • the joining bevels 34 are then arranged in the counterpart, for example a plastic carrier or gear cover

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Motor Or Generator Frames (AREA)
  • Dc Machiner (AREA)

Abstract

The invention relates to a hammer brush (22) which can be pivotably mounted onto a brush holder (24) of an electric machine (10), and comprising a leaf-spring (36). The leaf-spring (36) comprises a securing section (38) for anchoring onto the brush holder (24), an arm (40) which is connected to the securing section (38) whereon a carbon brush (30) is fixed, and a section (44) which is curved towards an end of the arm (40) towards the securing section (38). The section (44) is curved towards the side of the arm (40) facing away from the carbon brush (30) and is embodied in an elastic manner.

Description

Hammerbürste für eine elektrische MaschineHammer brush for an electric machine
Stand der TechnikState of the art
Die Erfindung geht aus von einer Hammerbürste für eine elektrische Maschine nach dem Oberbegriff des Patentanspruchs 1. Eine derartige Hammerbürste zur schwenkbaren Lagerung an einem Bürstenhalter der elektrischen Maschine hat in der Regel zweiThe invention relates to a hammer brush for an electric machine according to the preamble of claim 1. Such a hammer brush for pivotal mounting on a brush holder of the electric machine usually has two
Blattfedern, die einen Befestigungsabschnitt zur Verankerung an dem Bürstenhalter, einen sich an den Befestigungsabschnitt anschließenden Arm, an dem eine Kohlebürste befestigt ist, und einen am Ende des Arms zum Befestigungsabschnitt hin abgewinkelten Abschnitt umfassen. Um die geforderte Anpresskraft der Kohle zum Kommutator zu gewährleisten, ist eine Vorspannung der Hammerbürsten erforderlich. Bei der radialenLeaf springs comprising a fixing portion for anchoring to the brush holder, an adjoining the attachment portion arm, to which a carbon brush is attached, and an angled at the end of the arm to the attachment portion portion. To ensure the required contact force of the coal to the commutator, a bias of the hammer brushes is required. At the radial
Montage des Hammerbürstenhalters werden die vorgespannten Hammerbürsten mit den als Fügehilfen ausgebildeten Abschnitten, welche sich am Kommutator abstützen, aufgeweitet. Dabei ergibt sich eine hohe Knickbelastung für die Blattfedern der Hammerbürsten, besonders bei der ersten Berührung der Fügehilfe mit dem Kommutator. Die Oberfläche des Kommutators kann dabei beschädigt werden.Assembly of the hammer brush holder, the preloaded hammer brushes are widened with trained as mating sections, which are supported on the commutator. This results in a high buckling load for the leaf springs of the hammer brushes, especially at the first touch of the joining aid with the commutator. The surface of the commutator can be damaged.
Vorteile der ErfindungAdvantages of the invention
Die Hammerbürste für eine elektrische Maschine mit den Merkmalen des Patentanspruchs 1 hat den Vorteil, dass die Montage des Hammerbürstenhalters vereinfacht, die Positionierung der Kohle zum Kommutator verbessert und die Federkrafttoleranzen eingeengt wird. Hierzu ist eine Hammerbürste zur schwenkbaren Lagerung an einem Bürstenhalter einer elektrischen Maschine mit einer Blattfeder vorgesehen, wobei die Blattfeder einen Befestigungsabschnitt zur Verankerung an dem Bürstenhalter, einen sich an den Befestigungsabschnitt anschließenden Arm, an dem eineThe hammer brush for an electric machine with the features of claim 1 has the advantage that simplifies the assembly of the hammer brush holder, improves the positioning of the coal to the commutator and the spring force tolerances is narrowed. For this purpose, a hammer brush for pivotal mounting on a brush holder of an electric machine is provided with a leaf spring, wherein the leaf spring has a fixing portion for anchoring to the brush holder, an adjoining the attachment portion arm, on the one
Kohlebürste befestigt ist, und einen am Ende des Arms zum Befestigungsabschnitt hin abgewinkelten federnden Abschnitt umfasst, wobei der Abschnitt zu der von der Kohlebürste abgewandten Seite des Arms hin abgewinkelt ist.Carbon brush is attached, and comprises an angled at the end of the arm to the fastening portion out resilient portion, wherein the portion is angled to the side facing away from the carbon brush side of the arm.
Vorzugsweise ist der federnde Abschnitt zumindest unter einem spitzen Winkel zum Arm abgewinkelt. Dadurch ergeben sich genauer definierte Federkräfte. Für die Federkennlinie ist es vorteilhaft, wenn der Arm und der federnde Abschnitt über einen Bogen miteinander verbunden sind.Preferably, the resilient portion is angled at least at an acute angle to the arm. This results in more precisely defined spring forces. For the spring characteristic, it is advantageous if the arm and the resilient portion are connected to each other via an arc.
Dadurch, dass am Ende des federnden Abschnitts auf Höhe der Kohlebürste ein vom Arm weggewölbter, vorzugsweise bogenförmiger, Bereich ausgebildet ist, wird das Fügen der Hammerbürste in ein Bauteil vereinfachtCharacterized in that at the end of the resilient portion at the level of the carbon brush arched away from the arm, preferably arcuate, area is formed, the joining of the hammer brush is simplified into a single component
Wenn entlang des Arms eine Versteifung vorhanden ist, die eine Sicke, umgebogene Kanten oder eine zusätzliche Platte ist, wird dadurch ein Kippen der Kohlen, was durch das Drehmoment aufgrund der Federkraft eingeleitet wird, verhindert.If a stiffener is present along the arm, which is a bead, bent edges or an additional plate, thereby a tilting of the coals, which is initiated by the torque due to the spring force prevented.
Ein Bürstenhalter mit zwei auf dem Bürstenhalter angeordneten, von dem Bürstenhalter abstehenden Hammerbürsten, wobei die Kohlebürsten einander zugewandt sind und die federnden Abschnitte voneinander weg weisen, lässt sich leicht montieren. Wenn bei einem derartigen Bürstenhalter die Arme im nicht montierten Zustand im Wesentlichen parallel zueinander angeordnet sind. So ist die Auflagekraft auf einen Kommutator bei der Montage sehr gering und wird erst gegen Ende des Montagevorgangs aufgebracht.A brush holder with two arranged on the brush holder, projecting from the brush holder hammer brushes, wherein the carbon brushes facing each other and the resilient portions facing away from each other, can be easily assembled. With such a brush holder, when the arms are not mounted, they are arranged substantially parallel to each other. Thus, the contact force on a commutator during assembly is very low and is applied only towards the end of the assembly process.
Diese Montagevereinfachung wirkt sich auch auf eine elektrische Maschine mit mindestens einer derartigen Hammerbürste aus. Gleiches trifft auf eine elektrische Maschine mit einem derartigen Bürstenhalter zu, wobei der Bürstenhalter mit den Hammerbürsten voran in einer Ausnehmung angeordnet ist, wobei die Hammerbürsten an einem in der Ausnehmung angeordneten Kommutator anliegen und wobei die Ausnehmung zwei Seitenwände hat, an denen die federnden Abschnitte anliegen.This assembly simplification also affects an electric machine with at least one such hammer brush. The same applies to an electric machine with such a brush holder, wherein the brush holder is arranged with the hammer brushes in a recess in front, wherein the hammer brushes abut a commutator arranged in the recess and wherein the recess has two side walls, against which the resilient portions ,
Weiterhin lässt sich die Montage vereinfachen, wenn an den Seitenwänden Fügeschrägen für die federnden Abschnitte der Arme ausgebildet sind.Furthermore, the assembly can be simplified if on the side walls joining bevels are formed for the resilient portions of the arms.
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.
Zeichnungdrawing
Ein Ausführungsbeispiel ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Elektromotor im Längsschnitt, Figur 2 eine Kommutierungsvorrichtung des Elektromotors gemäß der Schnittlinie 11-11 in Figur 2 und Figur 3 die Kommutierungsvorrichtung aus Figur 2 in Montageposition.An embodiment is shown in the drawing and explained in more detail in the following description. 1 shows an electric motor in longitudinal section, 2 shows a commutation device of the electric motor according to the section line 11-11 in FIG. 2 and FIG. 3 shows the commutating device from FIG. 2 in the assembly position.
Beschreibung des AusführungsbeispielsDescription of the embodiment
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 Sitzversteller, 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 17 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 Hammerbürsten 22 an zwei radial gegenüberliegenden Seiten beaufschlagt. Die Hammerbürsten 22 sind auf einem Bürstenhalter 24 angeordnet Der Kommutator 20, die Hammerbürsten 22 und der Bürstenhalter 24 bilden eine Kommutierungsvorrichtung 26.In the figure 1, 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 Sitzversteller, windows, wiper drive, blowers, 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 17 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 periphery of two hammer brushes 22 on two radially opposite sides. The hammer brushes 22 are arranged on a brush holder 24. The commutator 20, the hammer brushes 22 and the brush holder 24 form a commutation device 26.
Der Kommutator 20 und teilweise die Hammerbürsten 22 sind in einer Ausnehmung 28, die sich beispielsweise in einem Getriebegehäuse befinden kann, angeordnet.The commutator 20 and partially the hammer brushes 22 are arranged in a recess 28, which may be located for example in a transmission housing.
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 ist mit den Hammerbürsten 22 voran in der Ausnehmung 28 angeordnet ist. Die Hammerbürsten 22 liegen mit Kohlebürsten 30 an dem in der Ausnehmung angeordneten Kommutator 20 an. Die Hammerbürsten 22 ihrerseits liegen an zwei zueinander parallelen Seitenwänden 32 der Λusnehmung 28 an. Die Seitenwände 32 haben an ihrem äußeren Rand jeweils einander zugewandte als Fügehilfen dienende Einfuhrschrägen 34.In FIG. 2, 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 is arranged in the recess 28 with the hammer brush 22 ahead. The hammer brushes 22 abut with carbon brushes 30 on the commutator 20 arranged in the recess. The hammer brushes 22 in turn bear against two mutually parallel side walls 32 of the recess 28. The side walls 32 each have at their outer edge facing each other serving as a joining aids chamfers 34th
Die Hammerbürsten 22 zur schwenkbaren Lagerung an dem Bürstenhalter 24 umfassen jeweils eine Blattfeder 36. Jede Blattfeder 36 umfasst einen Befestigungsabschnitt 38, mit dem am Bürstenhalter 24 verankert ist. Über den Befestigungsabschnitt 38 oder zusätzliche Litzen erfolgt die Stromversorgung der Hammerbürste 22. An den Befestigungsabschnitt 38 schließt sich ein Arm 40 in Form einer Blattfeder an. An dem Arm 40 ist auch die Kohlebürste 30 befestigt. Vorzugsweise über einen Bogen 42 mit ein 1 bis 3 Millimeter Radius schließt sich an den Arm 40 an dessen Ende ein zum Befestigungsabschnitt 38 bzw. zum Bürstenhalter 24 hin bzw. in dessen Richtung abgewinkelter federnder Abschnitt 44. Der abgewinkelte Abschnitt 44 ist im nicht montierten Zustand (Figur 3) unter einem spitzen Winkel von 5 bis 25° zum Arm 40 abgewinkelt. Der federnde Abschnitt 44 ist zu der von der Kohlebürste 30 abgewandten Seite des Arms 40 hin abgewinkelt. Am Ende des abgewinkelten Abschnitts 44 ungefähr auf Höhe der Kohlebürste 30 ist ein vom Arm 40 weggewölbter, vorzugsweise bogenförmiger, Bereich 46 ausgebildet. Der Bereich 46 entspricht im Wesentlichen einem Halbkreis.The hammer brushes 22 for pivotable mounting on the brush holder 24 each include a leaf spring 36. Each leaf spring 36 includes a mounting portion 38, is anchored to the brush holder 24. The power supply of the hammer brush 22 takes place via the attachment section 38 or additional strands. An arm 40 in the form of a leaf spring connects to the attachment section 38. On the arm 40 and the carbon brush 30 is attached. Preferably via an arc 42 with a 1 to 3 millimeter radius is followed by the arm 40 at the end of an attachment portion 38 and the brush holder 24 toward or in the direction angled resilient portion 44. The angled portion 44 is in the unassembled state (Figure 3) at an acute angle of 5 to 25 ° to the arm 40 angled. The resilient portion 44 is angled away from the side facing away from the carbon brush 30 side of the arm 40 out. At the end of the angled portion 44 approximately at the level of the carbon brush 30 is a weggewölbter from the arm 40, preferably arcuate, area 46 is formed. The area 46 essentially corresponds to a semicircle.
Entlang des Arms 40 ist zwischen dem Befestigungsabschnitt 38 und dem Bogen 42 eine Versteifung 48 vorhanden. Die Versteifung 48 kann als Sicke ausgebildet sein oder als die beiden Seilenkante entlang des Arms 40 können abgewinkelt sein. Auch kann eine Platte beispielsweise angeschweißt sein.Along the arm 40, a stiffener 48 is present between the attachment portion 38 and the bow 42. The stiffener 48 may be formed as a bead or as the two edge of the rope along the arm 40 may be angled. Also, a plate may be welded, for example.
Wie aus der Figur 3 hervorgeht, sind die Arme 40 zumindest im nicht montierten Zustand im Wesentlichen parallel zueinander angeordnet. Die Kohlebürsten 30 sind dabei einander zugewandt und die federnden Abschnitte 44 weisen voneinander weg. Die Arme 40 dienen der Vorpositionierung der Kohlebürsten 30. Beim Einfügen des Bürstenhalters 24 bzw. der Hammerbürsten 22 werden zunächst die abgewinkelten Abschnitte 44 mittels der mit den Einführschrägen 34 in Kontakt kommenden bogenförmige Bereiche 46 zusammengedrückt und gespannt. Dies kann so erfolgen, dass die Kohlebürsten 30 nur radial an den Kommutator 20 gedrückt werden ohne an diesem tangential entlang zu schleifen. Dadurch wird die Oberfläche nicht zerkratzt. Es kann jedoch zulässig sein, dass die Kohlebürsten 30 doch etwas an der Oberfläche des Kommutators 20 entlang schleifen. Die Arme 40 werden lediglich um den Positionsversatz zwischen dem Kommutator 20 und Bürstenhalter 24 geschwenkt, weshalb die Versteifungen vorgesehen werden können, die ein störendes Kippen der Kohlebürsten 30, was durch das Drehmoment aufgrund der Federkraft eingeleitet werden kann, so gut verhindernAs can be seen from FIG. 3, the arms 40 are arranged substantially parallel to each other at least in the unassembled state. The carbon brushes 30 are facing each other and the resilient portions 44 face away from each other. The arms 40 are used to pre-position the carbon brushes 30. When inserting the brush holder 24 and the hammer brushes 22, the angled portions 44 are first compressed by means of the arcuate portions 46 coming into contact with the chamfers 34 and tensioned. This can be done so that the carbon brushes 30 are pressed radially only to the commutator 20 without tangentially along this. As a result, the surface is not scratched. However, it may be permissible for the carbon brushes 30 to drag somewhat along the surface of the commutator 20. The arms 40 are pivoted only by the positional offset between the commutator 20 and the brush holder 24, which is why the stiffeners can be provided so well prevent a disturbing tilting of the carbon brushes 30, which can be initiated by the torque due to the spring force
Die Hammerbürsten 22 können auch in der Ausnehmung 28 selbst angeordnet werden. Die Fügeschrägen 34 sind dann im Gegenstück, beispielsweise einem Kunststoffträger oder Getriebedeckel, angeordnet The hammer brushes 22 can also be arranged in the recess 28 itself. The joining bevels 34 are then arranged in the counterpart, for example a plastic carrier or gear cover

Claims

Ansprüche claims
1. Hammerbürste (22) zur schwenkbaren Lagerung an einem Bürstenhalter (24) einer elektrischen Maschine (10) mit einer Blattfeder (36), wobei die Blattfeder (36) umfasst einen Befestigungsabschnitt (38) zur Verankerung an dem Bürstenhalter (24), einen sich an den Befestigungsabschnitt (38) anschließenden Arm (40), an dem eine Kohlebürste (30) befestigt ist, und einen am Ende des Arms (40) zum Befestigungsabschnitt (38) hin abgewinkelten Abschnitt (44), dadurch gekennzeichnet, dass der Abschnitt (44) zu der von der Kohlebürste (30) abgewandten Seite des Arms (40) hin abgewinkelt ist und federnd ausgebildet ist.A hammer brush (22) for pivotal mounting to a brush holder (24) of an electrical machine (10) having a leaf spring (36), the leaf spring (36) comprising a mounting portion (38) for anchoring to the brush holder (24) arm (40) adjoining the attachment portion (38) to which a carbon brush (30) is attached, and a portion (44) angled towards the attachment portion (38) at the end of the arm (40), characterized in that the portion (44) is angled towards the side facing away from the carbon brush (30) side of the arm (40) and is resilient.
2. Hammerbürste (22) nach Anspruch 1, dadurch gekennzeichnet, dass der federnde Abschnitt (44) zumindest unter einem spitzen Winkel zum Arm (40) abgewinkelt ist.2. hammer brush (22) according to claim 1, characterized in that the resilient portion (44) is angled at least at an acute angle to the arm (40).
3. Hammerbürste (22) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Arm3. hammer brush (22) according to claim 1 or 2, characterized in that the arm
(40) und der federnde Abschnitt (44) über einen Bogen (42) miteinander verbunden sind.(40) and the resilient portion (44) via an arc (42) are interconnected.
4. Hammerbürste (22) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass am Ende des federnden Abschnitts (44) auf Höhe der Kohlebürste (30) ein vom Arm (40) weggewölbter, vorzugsweise bogenförmiger, Bereich (46) ausgebildet ist.4. hammer brush (22) according to any one of the preceding claims, characterized in that at the end of the resilient portion (44) at the level of the carbon brush (30) from the arm (40) weggewölbter, preferably arcuate, region (46) is formed.
5. Hammerbürste (22) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass entlang des Arms (40) eine Versteifung (48) in Form einer Sicke, umgeklappter Seitenkanten oder einer zusätzliche Platte vorhanden ist.5. hammer brush (22) according to any one of the preceding claims, characterized in that along the arm (40) has a stiffener (48) in the form of a bead, folded side edges or an additional plate is present.
6. Bürstenhalter (24) mit mindestens zwei auf dem Bürstenhalter (24) angeordneten, von dem Bürstenhalter (24) abstehenden Hammerbürsten (22) nach einem der vorhergehenden Ansprüche, wobei die Kohlebürsten (30) einander zugewandt sind und die federnden Abschnitte (44) voneinander weg weisen. 6. brush holder (24) with at least two on the brush holder (24) arranged, from the brush holder (24) protruding hammer brushes (22) according to any one of the preceding claims, wherein the carbon brushes (30) facing each other and the resilient portions (44) point away from each other.
7. Bürstenhalter (24) nach Anspruch 6, dadurch gekennzeichnet, dass die Arme 0 zumindest im nicht montierten Zustand im Wesentiichen parallel zueinander angeordnet sind.7. Brush holder (24) according to claim 6, characterized in that the arms 0 are arranged at least in the unassembled state substantially parallel to each other.
8. Elektrische Maschine (10) mit mindestens einer Hammerbürste (22) nach einem der Ansprüche 1 bis 5.8. Electrical machine (10) with at least one hammer brush (22) according to one of claims 1 to 5.
9. Elektrische Maschine (10) mit einem Bürstenhalter (24) nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass der Bürstenhalter (24) mit den Hammerbürsten (22) voran in einer Ausnehmung (28) angeordnet ist, wobei die Hammerbürsten (22) an einem in der Ausnehmung (28) angeordneten Kommutator (20) anliegen, und dass die Ausnehmung (28) zwei Seitenwände (32) hat, an denen die federnden Abschnitte (44) anliegen.9. Electrical machine (10) with a brush holder (24) according to claim 6 or 7, characterized in that the brush holder (24) is arranged with the hammer brush (22) in a first recess (28), wherein the hammer brushes (22) on a in the recess (28) arranged commutator (20) abut, and that the recess (28) has two side walls (32) against which the resilient portions (44).
10. Elektrische Maschine (10) nach Anspruch 9, dadurch gekennzeichnet, dass an den10. Electrical machine (10) according to claim 9, characterized in that the
Seilenwänden (32) Fügeschrägen (34) für die Hammerbürsten (22) ausgebildet sind. Rope walls (32) joining bevels (34) are formed for the hammer brush (22).
EP05752513A 2004-06-18 2005-06-14 Hammer brush for an electric machine Not-in-force EP1761977B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05752513T PL1761977T3 (en) 2004-06-18 2005-06-14 Hammer brush for an electric machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004029534A DE102004029534A1 (en) 2004-06-18 2004-06-18 Hammer brush for an electric machine
PCT/EP2005/052736 WO2005124946A1 (en) 2004-06-18 2005-06-14 Hammer brush for an electric machine

Publications (2)

Publication Number Publication Date
EP1761977A1 true EP1761977A1 (en) 2007-03-14
EP1761977B1 EP1761977B1 (en) 2007-10-17

Family

ID=34970251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05752513A Not-in-force EP1761977B1 (en) 2004-06-18 2005-06-14 Hammer brush for an electric machine

Country Status (9)

Country Link
US (1) US20080048518A1 (en)
EP (1) EP1761977B1 (en)
JP (1) JP2008503195A (en)
CN (1) CN1969432A (en)
AT (1) ATE376271T1 (en)
DE (2) DE102004029534A1 (en)
ES (1) ES2293586T3 (en)
PL (1) PL1761977T3 (en)
WO (1) WO2005124946A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007053272A1 (en) * 2007-11-08 2009-05-14 Robert Bosch Gmbh drive unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE496914C (en) * 1927-05-20 1930-04-29 Siemens Schuckertwerke Akt Ges Carbon brush holder for electrical machines with a helical compression spring, one end resting against the brush, with the other end clamped to the brush holder
US2262409A (en) * 1939-11-29 1941-11-11 Westinghouse Electric & Mfg Co Synchro-tie unit
DE2413578A1 (en) * 1974-03-21 1975-10-02 Bosch Siemens Hausgeraete SMALL ELECTRIC APPLIANCE, IN PARTICULAR HOUSEHOLD COFFEE GRINDER OR THE LIKE.
US4238703A (en) * 1978-07-14 1980-12-09 Aupac Kabushiki Kaisha Brush device for a miniature electric motor
JPS6173547A (en) * 1984-09-17 1986-04-15 Matsushita Electric Ind Co Ltd Brush retainer for miniature commutator motor
DE10063405C2 (en) * 2000-12-19 2003-01-23 K Tec Gmbh Holder for a carbon brush
DE10148705A1 (en) * 2001-10-02 2003-04-10 Valeo Auto Electric Gmbh Brush holder system for electrical drive, has brush holder plate with guide arrangement for guiding brushes or brush sections of flat springs with brushes in radial direction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005124946A1 *

Also Published As

Publication number Publication date
DE502005001753D1 (en) 2007-11-29
US20080048518A1 (en) 2008-02-28
JP2008503195A (en) 2008-01-31
ATE376271T1 (en) 2007-11-15
CN1969432A (en) 2007-05-23
EP1761977B1 (en) 2007-10-17
ES2293586T3 (en) 2008-03-16
PL1761977T3 (en) 2008-03-31
WO2005124946A1 (en) 2005-12-29
DE102004029534A1 (en) 2006-01-05

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