EP1444757A1 - Carbon brush - Google Patents

Carbon brush

Info

Publication number
EP1444757A1
EP1444757A1 EP02781315A EP02781315A EP1444757A1 EP 1444757 A1 EP1444757 A1 EP 1444757A1 EP 02781315 A EP02781315 A EP 02781315A EP 02781315 A EP02781315 A EP 02781315A EP 1444757 A1 EP1444757 A1 EP 1444757A1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
spring
shut
sheath
recess
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
EP02781315A
Other languages
German (de)
French (fr)
Other versions
EP1444757B1 (en
Inventor
Diethard Schunk Italia S.r.l. Schaut
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.)
Schunk Kohlenstofftechnik GmbH
Original Assignee
Schunk Kohlenstofftechnik 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 Schunk Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP1444757A1 publication Critical patent/EP1444757A1/en
Application granted granted Critical
Publication of EP1444757B1 publication Critical patent/EP1444757B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H01R39/59—Means structurally associated with the brushes for interrupting current

Definitions

  • the invention relates to a carbon brush with a shut-off element which is arranged in a recess and at least partially surrounded by a sheathing and comprises a pin, which is preferably biased in the longitudinal direction of the carbon brush and consists of an electrically insulating material such as a shut-off lip], the sheath being fastened in the carbon brush. and optionally a current-conducting strand.
  • shutdown devices are integrated in the carbon brushes.
  • the shutdown devices consist of a pin or nipple made of electrically insulating material, which is acted upon by a helical compression spring in the direction of the running surface of the carbon brush.
  • the helical compression spring can be supported on a separating plate which is fixed in the carbon brush by means of ramming powder or by means of an insulating pin running transversely to the shutdown device.
  • a carbon brush with shut-off nipple is e.g. B. EP 0 512 234 A2 or DE 28 04 547 AI.
  • current can be conducted via a stranded wire or via a pressure element, such as a pressure spring, which acts in the carbon brush direction of the commutator.
  • the present invention is based on the problem of developing a carbon brush of the type mentioned at the outset in such a way that the shut-off element can be fixed in the carbon brush without any problems, the spring being able to have a desired pretension which cannot be compensated for by separate tools during assembly. It should also be ensured that the forces caused by the spring do not exert any impermissible forces on the carbon brush when the shut-off element is fixed. Furthermore, there is to be a simplification in terms of assembly when the shut-off element is fixed in the carbon brush.
  • the problem is solved in that the shut-off element with the pretensioned spring is surrounded on the pin side by the sheath consisting of electrically insulating material in such a way that the sheath takes on the pretension of the spring.
  • a shrink film can also be used as a covering.
  • the shutdown element is supplied as a prefabricated component with a prestressed spring element, such as a helical compression spring, to the carbon brush having the recess in order to be fixed in the former. It is not necessary to ramming the assembled component or fixing its coil spring by means of a separating plate or a pin made of insulating material.
  • a prestressed spring element such as a helical compression spring
  • the shutdown element with the sheath surrounding it at least in regions is inserted and fixed in the recess as a prefabricated unit with a prestressed spring.
  • the casing is perforated on the switching nipple side.
  • the sheath can also have a lower material thickness on the switching nipple side than on the spring side.
  • the switching nipple-spring assembly can be used as a unit in such a way that the spring is pretensioned to the required extent with respect to the switching nipple, without the spring having to be supported separately in the carbon brush.
  • the switching nipple can enforce the covering with the result that the switching nipple is supported on the commutator on the one hand and the spring lifts the carbon brush from the commutator on the other hand.
  • the particular advantages of the invention are the simple assembly, since an automatic assembly machine, which is associated with high costs, is not required. Rather, a simple drilling device is sufficient.
  • the assembled component can also be inserted regardless of location. The production can be carried out or relocated without great effort.
  • the invention is also characterized by a method for equipping a carbon brush with a shut-off element to be introduced into a recess thereof, comprising a pin, which is biased by a spring and made of electrically insulating material, such as a shut-off nipple, the covering being fastened in the carbon brush, in that: Shut-off device with a prestressed spring in which the pre-tensioning of the spring-containing sheathing consisting of electrically insulating material is arranged and introduced as a prefabricated part into the recess and fixed in it.
  • a section of a carbon brush 10 is shown, which is intended in particular for small machines such as power tools or garden pumps or washing machines or washing machine motors, that is to say for motors in general in which multiple assembly is to take place, but without thereby teaching the invention is restricted.
  • the teaching according to the invention also applies to carbon brushes, in which the current is conducted via a pressure spring (not shown), via which the carbon brush is subjected to force in the direction of a commutator in order to rest on the latter.
  • a recess 18 is preferably provided, which runs along the longitudinal axis 16 of the brush and in which a shut-off element 20 is arranged.
  • the shut-off device 20 comprises an insulating pin or element having the same effect as the shut-off nipple 22, which is made of an electrically insulating material and which is in the carbon brush 10 under the action of a strongly pre-tensioned spring 24 such as a helical compression spring.
  • the shut-off device 20 with the shut-off nipple 22 and the spring 24 is according to the invention from surrounded by an envelope 26.
  • the unit thus formed is in the recess 18 by z. B. adhesive 28 fixed.
  • the bias of the spring 24 is absorbed by the sheath 26, so that the carbon brush 10 is not loaded. It is also not necessary for the shutdown element 20 to be stamped into the recess 18, as is the case in the prior art.
  • the sheath 26 surrounds the shut-off element 20 with the shut-off nipple 22 and the spring 24 in such a way that the spring 24 is received in the prestressed state. It is not absolutely necessary for a sheath 26 to completely surround the shutdown element 20.
  • the region of the switching nipple 22 on the commutator side is exposed both by the carbon brush 10 and by the sheath 26, so that the switch-off nipple 22 can rest on the commutator.
  • the preload of the spring 24 can decrease, with the result that the carbon brush 10 is lifted off the commutator. This prevents a brush fire, so that the commutator cannot be roughened or out of round by brush fire.
  • the sheath 26 is made of electrically insulating material and can be designed as a shrink film, in which the shut-off element 20 with the shut-off nipple 22 and the prestressed spring 24 is arranged.
  • the unit thus formed can be inserted into the recess 18 and mentioned z. B. be fixed by adhesive or other suitable measures.
  • shutdown element 22 is supplied in the prestressed state simplifies the assembly of carbon brushes which are to be designed to be self-shutdown.
  • the covering 26 can be provided in the tread area 30 z. B. be perforated or have a lower material thickness than in the peripheral region or in the region of the spring 24.

Abstract

The invention relates to a carbon brush (10) with a disconnecting element (20) arranged in a recess (18).Said disconnecting element comprises a disconnection fitting which is pre-tensed by means of a spring and made of an electrically insulating material. In order to easily arrange the disconnecting element in the carbon brush with the desired spring pre-tensing, the disconnecting element (20) with the pre-tensed spring (24) is surrounded by a covering (26) made of an electrically insulating material, said covering being fixed in the recess (18) of the carbon brush (10).

Description

Beschreibungdescription
Kohlebürstecarbon brush
Die Erfindung bezieht sich auf eine Kohlebürste mit einem in einer Ausnehmung dieser angeordneten zumindest teilweise von einer Umhüllung umgebenen Abschaltorgan umfassend einen über eine Feder vorzugsweise in Kohlebürstenlängsrichtung vorgespannten aus elektrisch isolierendem Material bestehenden Stift wie Abschaltnippe], wobei die Umhüllung in der Kohlebürste befestigt ist. sowie gegebenenfalls einer stromleitenden Litze.The invention relates to a carbon brush with a shut-off element which is arranged in a recess and at least partially surrounded by a sheathing and comprises a pin, which is preferably biased in the longitudinal direction of the carbon brush and consists of an electrically insulating material such as a shut-off lip], the sheath being fastened in the carbon brush. and optionally a current-conducting strand.
Insbesondere bei Kleinmaschinen wie Elektrowcrkzeυgen oder gewerblichen Hausgeräten ist es erforderlich, mehrere Kohlebürstcnbestückungcn hintereinander ohne Kommutator-Nacharbeit abzufahren. Damit die nach Ablauf der Erstbest ückung folgenden Ersatzbestückungen ausreichende Standzeiten erzielen, muss der Kommutator ausreichend rund und frei von stärkeren Anfleckungen sein. Dies ist nur dann möglich, wenn die jeweiligen zum Einsatz gelangenden Kohlebürsten bei Erreichen ihrer Verschleißgrenze nicht den Kommutator durch zunehmendes Bürstenfcuer unzulässig stark aufrauhen bzw. unrund feuern. Es muss außerdem vermieden werden, dass eine Litze bzw. ein Stampfkontakt mit dem Kommutator in Berührung gelangt, der andernfalls beschädigt werden würde.Particularly in the case of small machines such as electric tools or commercial household appliances, it is necessary to run several carbon brushes in succession without reworking the commutator. The commutator must be sufficiently round and free from severe staining so that the replacement assemblies that follow the initial assembly have a sufficient service life. This is only possible if the respective carbon brushes used do not roughen the commutator to an unacceptable extent or fire out of round due to increasing brushing speed when their wear limit is reached. It must also be avoided that a strand or ramming contact comes into contact with the commutator, which would otherwise be damaged.
Um dies zu erreichen, werden in den Kohlebürsten Abschaltvorrichtungen integriert. Die Abschaltvorrichtungen bestehen dabei aus einem aus elektrisch isolierendem Material bestehenden Stift oder Nippel, der mittels einer Schraubendruckfeder in Richtung der Lauffläche der Kohlebürste kraftbeaυfschlagt ist. Die Schraubendruckfeder kann sich auf ein Trenn- plättchen abstützen, das in der Kohlebürste mittels Einstampfpulver oder mittels eines quer zu der Abschaltvorrichtung verlaufenden Isolierstifts fixiert ist.To achieve this, shutdown devices are integrated in the carbon brushes. The shutdown devices consist of a pin or nipple made of electrically insulating material, which is acted upon by a helical compression spring in the direction of the running surface of the carbon brush. The helical compression spring can be supported on a separating plate which is fixed in the carbon brush by means of ramming powder or by means of an insulating pin running transversely to the shutdown device.
Erreicht die Kohlebürste ihre Verschleißgrenze, so ist der Abschaltnippel freigelegt mit der Folge, dass dieser frei beweglich ist, also durch Abstützen auf dem Kommutator die Kohlebürste von diesem abhebt. Aufgrund der erforderlichen hohen Vorspannung durch die Schraubendruckfeder muss das Einstampfpulver bzw. der Isolierstift erhebliche Kräfte kompensieren, so dass die Kohlebürste beim Fixieren des Abschaltorgans die Kohlebürste zerbrechen kann. Auch sind montagemäßig Nachteile gegeben, da die Schrauben feder vorgespannt werden muss.When the carbon brush reaches its wear limit, the switch-off nipple is exposed, with the result that it can move freely, that is to say the carbon brush is lifted from the commutator by being supported on it. Due to the high prestress required by the helical compression spring, the ramming powder or the insulating pin has to compensate for considerable forces, so that the carbon brush can break the carbon brush when the shut-off element is fixed. There are also disadvantages in terms of assembly, since the screws have to be spring-loaded.
Eine Kohlebürste mit Abschaltnippel ist z. B. der EP 0 512 234 A2 oder der DE 28 04 547 AI zu entnehmen.A carbon brush with shut-off nipple is e.g. B. EP 0 512 234 A2 or DE 28 04 547 AI.
Unabhängig von dem Abschaltorgan kann bei der Kohlebürste Strom über eine Litze oder über eine in Kohlebürstenrichtung des Kommutators kraftbeaufschlagendes Andruckelement wie Andruckfeder geleitet werden.Regardless of the switch-off device, in the carbon brush, current can be conducted via a stranded wire or via a pressure element, such as a pressure spring, which acts in the carbon brush direction of the commutator.
Dem DE 74 04 456 Ul ist eine gattungsbildende Kohlebürste mit einem Abschaltorgan zu entnehmen. Dieses umfasst ein Druckstück, das eine Kapsel durchsetzt. Um ein unkontrolliertes Herausgleiten des Druckstückes zu vermeiden, ist eine Verengung in der Kapsel vorgesehen. Zum ordnungsgemäßen Positionieren des Abschaltorgans muss die Kapsel mit dem Druckstück derart in ein Sackloch der Kohlebürste eingebracht werden, dass eine in der Kapsel vorhandene Feder über das Druckstück, das sich an der Kohlebürste abstützt, vorgespannt wird.DE 74 04 456 Ul shows a generic carbon brush with a shut-off device. This includes a pressure piece that passes through a capsule. In order to prevent the pressure piece from sliding out in an uncontrolled manner, a constriction is provided in the capsule. For proper positioning of the shut-off device, the capsule with the pressure piece must be inserted into a blind hole in the carbon brush in such a way that a spring present in the capsule is prestressed via the pressure piece that is supported on the carbon brush.
Der vorliegenden Erfindung liegt das Problem zu Grunde, eine Kohlebürste der eingangs genannten Art so weiterzubilden, dass das Abschaltorgan problemlos in der Kohlebürste fixierbar ist, wobei die Feder eine gewünschte Vorspannung aufweisen kann, die während der Montage durch gesonderte Werkzeuge nicht zu kompensieren ist. Auch soll sichergestellt sein, dass die von der Feder hervorgerufenen Kräfte bei fixiertem Abschaltorgan keine unzulässigen Kräfte auf die Kohlebürste ausüben. Ferner soll eine montagemäßige Vereinfachung beim Fixieren des Abschaltorgans in der Kohlebürste erfolgen.The present invention is based on the problem of developing a carbon brush of the type mentioned at the outset in such a way that the shut-off element can be fixed in the carbon brush without any problems, the spring being able to have a desired pretension which cannot be compensated for by separate tools during assembly. It should also be ensured that the forces caused by the spring do not exert any impermissible forces on the carbon brush when the shut-off element is fixed. Furthermore, there is to be a simplification in terms of assembly when the shut-off element is fixed in the carbon brush.
Erfindungsgemäß wird das Problem dadurch gelöst, dass das Abschaltorgan mit vorgespannter Feder von der aus elektrisch isolierendem Material bestehenden Umhüllung stiftseitig derart umgeben ist, dass die Umhüllung Vorspannung der Feder aufnimmt. Als Umhüllung kann auch eine Schrumpffolie benutzt werden.According to the invention, the problem is solved in that the shut-off element with the pretensioned spring is surrounded on the pin side by the sheath consisting of electrically insulating material in such a way that the sheath takes on the pretension of the spring. A shrink film can also be used as a covering.
Eriindungsgemäß wird das Abschaltorgan als konfektioniertes Bauteil mit vorgespanntem Federelement wie Schraubendruckfeder der die Ausnehmung aufweisenden Kohlebürste zugeführt, um in ersterer fixiert zu werden. Ein Einstampfen des konfektionierten Bauteils bzw. ein Fixieren dessen Schraubenfeder durch ein Trennplättchen oder einen aus isolierendem Material bestehenden Stift ist nicht erforderlich.According to the invention, the shutdown element is supplied as a prefabricated component with a prestressed spring element, such as a helical compression spring, to the carbon brush having the recess in order to be fixed in the former. It is not necessary to ramming the assembled component or fixing its coil spring by means of a separating plate or a pin made of insulating material.
Mit anderen Worten wird vorgeschlagen, dass das Abschaltorgan mit der dieses zumindest bereichsweise umgebenden Umhüllung als vorgefertigte Einheit mit vorgespannter Feder in die Ausnehmung eingesetzt und fixiert ist.In other words, it is proposed that the shutdown element with the sheath surrounding it at least in regions is inserted and fixed in the recess as a prefabricated unit with a prestressed spring.
Um ein sicheres Abheben der Kohlebürste bei Erreichen deren Verschleißgrenze sicherzustellen, sieht eine Weiterbildung der Erfindung vor, dass die Umhüllung schaltnippelseitig perforiert ist. Alternativ oder ergänzend kann die Umhüllung auch schaltnippelseitig eine geringere Materialstärke als federseitig aufweisen.In order to ensure that the carbon brush is safely lifted off when its wear limit is reached, a further development of the invention provides that the casing is perforated on the switching nipple side. As an alternative or in addition, the sheath can also have a lower material thickness on the switching nipple side than on the spring side.
Durch diese Maßnahmen ist sichergestellt, dass einerseits die Baueinheit Schaltnippel-Feder derart als Einheit verwendbar ist, dass die Feder im erforderlichen Umfang gegenüber dem Schaltnippel vorgespannt ist, ohne dass eine gesonderte Abstützung der Feder in der Kohlebürste erforderlich ist. Gleichzeitig ist sichergestellt, dass dann, wenn die Schaltorganeinheit durch Abnutzung der Kohlebürste freigelegt ist, der Schaltnippel die Umhüllung mit der Folge durchsetzen kann, dass sich der Schaltnippel einerseits auf dem Kommutator abstützt und andererseits die Feder die Kohlebürste von dem Kommutator abhebt.These measures ensure that, on the one hand, the switching nipple-spring assembly can be used as a unit in such a way that the spring is pretensioned to the required extent with respect to the switching nipple, without the spring having to be supported separately in the carbon brush. At the same time, it is ensured that when the switching organ unit is exposed due to wear of the carbon brush, the switching nipple can enforce the covering with the result that the switching nipple is supported on the commutator on the one hand and the spring lifts the carbon brush from the commutator on the other hand.
Als besondere Vorteile der Erfindung sind hervorzuheben die einfache Montage, da ein Montageautomat, der mit hohen Kosten verbunden ist, nicht erforderlich ist. Vielmehr genügt eine einfache Bohrvorrichtung. Auch kann ein Einsetzen des konfektionierten Bauteils ortsunabhängig erfolgen. Die Fertigung kann ohne großen Aufwand vorgenommen bzw. verlagert werden. Daher zeichnet sich die Erfindung auch durch ein Verfahren zum Bestücken einer Kohlebürste mit einem in einer Ausnehmung dieser einzubringenden Abschaltorgan umfassend einen über eine Feder vorgespannten aus elektrisch isolierendem Material bestehenden Stift wie Abschaltnippel, wobei die Umhüllung in der Kohlebürste befestigt wird, dadurch aus, dass das Abschaltorgan mit vorgespannter Feder in der aus elektrisch isolierendem Material bestehenden die Vorspannung der Feder aufnehmenden Umhüllung angeordnet wird und als konfektioniertes Teil in die Aussparung eingebracht und in dieser fixiert wird.The particular advantages of the invention are the simple assembly, since an automatic assembly machine, which is associated with high costs, is not required. Rather, a simple drilling device is sufficient. The assembled component can also be inserted regardless of location. The production can be carried out or relocated without great effort. Therefore, the invention is also characterized by a method for equipping a carbon brush with a shut-off element to be introduced into a recess thereof, comprising a pin, which is biased by a spring and made of electrically insulating material, such as a shut-off nipple, the covering being fastened in the carbon brush, in that: Shut-off device with a prestressed spring in which the pre-tensioning of the spring-containing sheathing consisting of electrically insulating material is arranged and introduced as a prefabricated part into the recess and fixed in it.
Weitere Einzelheiten, Vorteile und Merkmale der Erfindung ergeben sich nicht nur aus den Ansprüchen, den diesen zu entnehmenden Merkmalen - für sich/oder in Kombination -, sondern auch aus der nachfolgenden Beschreibung eines der Zeichnung zu entnehmenden bevorzugten Ausführungsbeispiels.Further details, advantages and features of the invention result not only from the claims, the features to be extracted from them - by themselves / or in combination - but also from the following description of a preferred embodiment to be taken from the drawing.
In der einzigen Figur ist ein Ausschnitt einer Kohlebürste 10 dargestellt, die insbesondere für Kleinmaschinen wie Elektrowerkzeuge oder Gartenpumpen oder Flaυsgeräte oder Waschmaschinen-Motoren bestimmt ist, also für Motoren allgemein, bei denen eine Mehrfachbestük- kung erfolgen soll, ohne dass jedoch hierdurch die erfindungsgemäße Lehre eingeschränkt wird. Gleiches gilt in Bezug auf die prinzipiell dargestellte stromführende Litze 12, die in einer Ausnehmung mittels Einstampfpulver 14 fixiert ist. Selbstverständlich gilt die erfindungsgemäße Lehre auch für Kohlebürsten, bei denen der Strom über eine nicht dargestellte Andruckfeder geleitet wird, über die die Kohlebürste in Richtung eines Kommutators kraftbeaufschlagt wird, um an diesem anzuliegen.In the single figure, a section of a carbon brush 10 is shown, which is intended in particular for small machines such as power tools or garden pumps or washing machines or washing machine motors, that is to say for motors in general in which multiple assembly is to take place, but without thereby teaching the invention is restricted. The same applies to the current-carrying wire 12 shown in principle, which is fixed in a recess by means of ramming powder 14. Of course, the teaching according to the invention also applies to carbon brushes, in which the current is conducted via a pressure spring (not shown), via which the carbon brush is subjected to force in the direction of a commutator in order to rest on the latter.
Unabhängig von dem Einsatzgebiet der Kohlebürste 10 und dessen Stromführung ist jedoch eine vorzugsweise entlang der Bürstenlängsachse 16 verlaufende Ausnehmung 18 vorgesehen, in der ein Abschaltorgan 20 angeordnet ist. Das Abschaltorgan 20 umfasst ein aus elektrisch isolierendem Material bestehenden Isolierstift oder gleichwirkendes Element wie Abschaltnippel 22, der in der Kohlebürste 10 unter Einwirkung einer stark vorgespannten Feder 24 wie Schraubendruckfeder steht.Regardless of the field of application of the carbon brush 10 and its current supply, a recess 18 is preferably provided, which runs along the longitudinal axis 16 of the brush and in which a shut-off element 20 is arranged. The shut-off device 20 comprises an insulating pin or element having the same effect as the shut-off nipple 22, which is made of an electrically insulating material and which is in the carbon brush 10 under the action of a strongly pre-tensioned spring 24 such as a helical compression spring.
Das Abschaltorgan 20 mit dem Abschaltnippel 22 und der Feder 24 ist erfindungsgemäß von einer Umhüllung 26 umgeben. Die so gebildete Einheit ist in der Aussparung 18 durch z. B. Klebstoff 28 fixiert. Die Vorspannung der Feder 24 wird von der Umhüllung 26 aufgenommen, so dass eine Belastung der Kohlebürste 10 nicht erfolgt. Auch ist es nicht erforderlich, dass das Abschaltorgan 20 in der Ausnehmung 18 eingestampft ist, wie dies nach dem Stand der Technik der Fall ist.The shut-off device 20 with the shut-off nipple 22 and the spring 24 is according to the invention from surrounded by an envelope 26. The unit thus formed is in the recess 18 by z. B. adhesive 28 fixed. The bias of the spring 24 is absorbed by the sheath 26, so that the carbon brush 10 is not loaded. It is also not necessary for the shutdown element 20 to be stamped into the recess 18, as is the case in the prior art.
Die Umhüllung 26 umgibt das Abschaltorgan 20 mit dem Abschaltnippel 22 und der Feder 24 derart, dass die Feder 24 im vorgespannten Zustand aufgenommen ist. Dabei ist es nicht zwingend erforderlich, dass eine Umhüllung 26 das Abschaltorgan 20 vollυmfanglich umgibt.The sheath 26 surrounds the shut-off element 20 with the shut-off nipple 22 and the spring 24 in such a way that the spring 24 is received in the prestressed state. It is not absolutely necessary for a sheath 26 to completely surround the shutdown element 20.
Hat die Kohlebürste 10 ihre Verschleißgrenze erreicht, so ist der kommutatorseitige Bereich des Schaltnipppels 22 sowohl von der Kohlebürste 10 als auch von der Umhüllung 26 freigelegt, so dass sich der Abschaltnippel 22 auf dem Kommutator auflegen kann. Gleichzeitig kann sich die Vorspannung der Feder 24 mit der Folge abbauen, dass die Kohlebürste 10 von dem Kommutator abgehoben wird. Ein Bürstenfeuer wird hierdurch unterbunden, so dass der Kommutator durch Bürstenfeuer nicht aufgerauht bzw. unrund werden kann.When the carbon brush 10 has reached its wear limit, the region of the switching nipple 22 on the commutator side is exposed both by the carbon brush 10 and by the sheath 26, so that the switch-off nipple 22 can rest on the commutator. At the same time, the preload of the spring 24 can decrease, with the result that the carbon brush 10 is lifted off the commutator. This prevents a brush fire, so that the commutator cannot be roughened or out of round by brush fire.
Die Umhüllung 26 besteht aus elektrisch isolierendem Material und kann quasi als Schrumpffolie ausgebildet sein, in der das Abschaltorgan 20 mit dem Abschaltnippel 22 und der vorgespannten Feder 24 angeordnet ist. Die so gebildete Einheit kann in die Ausnehmung 18 eingesetzt und erwähntermaßen z. B. durch Klebstoff oder andere geeignete Maßnahmen fixiert werden.The sheath 26 is made of electrically insulating material and can be designed as a shrink film, in which the shut-off element 20 with the shut-off nipple 22 and the prestressed spring 24 is arranged. The unit thus formed can be inserted into the recess 18 and mentioned z. B. be fixed by adhesive or other suitable measures.
Dadurch, dass das Abschaltorgan 22 im vorgespannten Zustand geliefert wird, erfolgt eine Vereinfachung der Bestückung von Kohlebürsten, die selbstabschaltend ausgebildet werden sollen.The fact that the shutdown element 22 is supplied in the prestressed state simplifies the assembly of carbon brushes which are to be designed to be self-shutdown.
Um ein sicheres Freigeben des Abschaltnippels 22 bei Erreichen der Verschleißgrenze der Kohlebürste 10 sicherzustellen, kann die Umhüllung 26 im laufflächigen Bereich 30 z. B. perforiert sein oder eine geringere Materialstärke als im Umfangsbereich bzw. im Bereich der Feder 24 aufweisen. In order to ensure a safe release of the shut-off nipple 22 when the wear limit of the carbon brush 10 is reached, the covering 26 can be provided in the tread area 30 z. B. be perforated or have a lower material thickness than in the peripheral region or in the region of the spring 24.

Claims

Patentansprüche claims
1. Kohlebürste (10) mit einem in einer Ausnehmung (18) dieser angeordneten zumindest teilweise von einer Umhüllung umgebenen Abschaltorgan (20) umfassend einen über eine Feder (24) vorzugsweise in Kohlebürstenlängsrichtung vorgespannten aus elektrisch isolierendem Material bestehenden Stift wie Abschaltnippel (22), wobei die Umhüllung (26) in der Kohlebürste befestigt ist, sowie gegebenenfalls eine stromleitende Litze (12), dadurch gekennzeichnet. dass das Abschaltorgan (20) mit vorgespannter Feder (24) von der aus elektrisch isolierendem Material bestehenden Umhüllung (26) stiftseitig derart umgeben ist, dass die Umhüllung Vorspannung der Feder aufnimmt.1. carbon brush (10) with a shut-off element (20) arranged in a recess (18) at least partially surrounded by a sheathing, comprising a pin consisting of an electrically insulating material, such as shut-off nipple (22), preferably biased in the longitudinal direction of the carbon brush, wherein the sheath (26) is fastened in the carbon brush, and optionally a current-conducting strand (12), characterized. that the shut-off element (20) with the pretensioned spring (24) is surrounded on the pin side by the sheath (26) made of electrically insulating material in such a way that the sheath absorbs pretension of the spring.
2. Kohlebürstenach Anspruch 1, dadurch gekennzeichnet, dass die Umhüllung (26) aus Kunststoff besteht.2. Carbon brush according to claim 1, characterized in that the covering (26) consists of plastic.
3. Kohlebürste nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Umhüllung (26) in der Ausnehmung (18) der Kohlebürste eingeklebt ist.3. Carbon brush according to claim 1 or 2, characterized in that the casing (26) is glued into the recess (18) of the carbon brush.
4. Kohlebürste nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Abschaltorgan (20) von der Umhüllung (26) umschweißt ist. 4. Carbon brush according to at least one of the preceding claims, characterized in that the shutdown element (20) is welded by the sheath (26).
5. Kohlebürste nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Umhüllung (26) kohlebürstenlaufflächenseitig perforiert ist.5. Carbon brush according to at least one of the preceding claims, characterized in that the casing (26) is perforated on the carbon brush tread side.
6. Kohlebürste nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Umhüllung (26) kohlebürstenlaufflächenseitig eine geringere Materialstärke als federseitig aufweist.6. Carbon brush according to at least one of the preceding claims, characterized in that the casing (26) has a smaller material thickness on the carbon brush tread side than on the spring side.
7. Kohlebürste nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Abschaltorgan (20) in einer Folie eingeschrumpft ist.7. Carbon brush according to at least one of the preceding claims, characterized in that the shutdown element (20) is shrunk in a film.
8. Kohlebürste nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Abschaltorgan (20) mit der dieses zumindest bereichsweise umgebenden Umhüllung (26) als vorgefertigte Einheit mit vorgespannter Feder (24) in die Ausnehmung (18) eingesetzt und fixiert ist.8. Carbon brush according to at least one of the preceding claims, characterized in that the shut-off element (20) with the at least regionally surrounding envelope (26) is inserted and fixed as a prefabricated unit with a prestressed spring (24) in the recess (18).
9. Verfahren zum Bestücken einer Kohlebürste (10) mit einem in einer Ausnehmung (18) dieser einzubringenden Abschaltorgan (20) umfassend einen über eine Feder (24) vorgespannten aus elektrisch isolierendem Material bestehenden Stift wie Abschaltnippel (22), wobei die Umhüllung in der Kohlebürste befestigt wird, d a d u rc h g e k e n n z e i c h n et, dass das Abschaltorgan (20) mit vorgespannter Feder (24) in der aus elektrisch isolierendem Material bestehenden die Vorspannung der Feder aufnehmenden Umhüllung (26) angeordnet wird und als konfektioniertes Teil in die Aussparung (18) eingebracht und in dieser fixiert wird.9. A method for equipping a carbon brush (10) with a shut-off element (20) to be introduced into a recess (18) comprising a pin (b) consisting of electrically insulating material and biased by a spring (24), the sheath being in the Carbon brush is fastened, so that the shut-off element (20) with the pre-tensioned spring (24) is arranged in the sheath (26) absorbing the pre-tensioning of the spring and made as an assembled part in the recess (18) and is fixed in it.
10. Verfahren nach Anspruch 9, d a d u rc h g e k e n n z e i c h n e t, dass die Umhüllung (26) in die Aussparung (18) eingeklebt wird. 10. The method according to claim 9, d a d u rc h g e k e n e z e i c h n e t that the sheath (26) is glued into the recess (18).
EP02781315A 2001-11-15 2002-11-13 Carbon brush Expired - Lifetime EP1444757B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10155991A DE10155991C2 (en) 2001-11-15 2001-11-15 carbon brush
DE10155991 2001-11-15
PCT/EP2002/012688 WO2003043142A1 (en) 2001-11-15 2002-11-13 Carbon brush

Publications (2)

Publication Number Publication Date
EP1444757A1 true EP1444757A1 (en) 2004-08-11
EP1444757B1 EP1444757B1 (en) 2006-02-01

Family

ID=7705764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02781315A Expired - Lifetime EP1444757B1 (en) 2001-11-15 2002-11-13 Carbon brush

Country Status (5)

Country Link
EP (1) EP1444757B1 (en)
CN (1) CN1586027A (en)
AT (1) ATE317161T1 (en)
DE (2) DE10155991C2 (en)
WO (1) WO2003043142A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005063170B4 (en) * 2005-12-30 2011-12-08 Schunk Kohlenstofftechnik Gmbh Method for equipping a carbon brush with a shutdown device
DE102008012963A1 (en) * 2008-03-06 2009-09-17 Schunk Kohlenstofftechnik Gmbh Method for producing a contact unit and contact unit
DE102010042804A1 (en) 2010-10-22 2012-04-26 Robert Bosch Gmbh Carbon brush with shut-off device
CN103427284A (en) * 2012-05-14 2013-12-04 海门市海菱碳业有限公司 Safety carbon brush for electric polisher
CN103427275A (en) * 2012-05-17 2013-12-04 海门市海菱碳业有限公司 Safety carbon brush of starting motor of automobile
CN103427301A (en) * 2012-05-18 2013-12-04 海门市华联电碳有限公司 Carbon brush for safe electric hammer
CN103427280A (en) * 2012-05-18 2013-12-04 海门市海菱碳业有限公司 Carbon brush for automatic-stop type angle polishing machine
CN102904146A (en) * 2012-10-26 2013-01-30 海门市通达碳业有限公司 Assembling method of electric brush assembly
DE102021107839A1 (en) * 2021-03-29 2022-09-29 Metabowerke Gmbh Layered carbon brush for an electric motor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2227658B1 (en) * 1973-04-26 1976-09-10 Lorraine Carbone
DE2804547A1 (en) * 1978-02-03 1979-08-09 Licentia Gmbh Carbon brush for commutator motor - has insulated signalling contact embedded in it to form closed circuit when brush needs changing
DE3047421A1 (en) * 1980-12-17 1982-07-15 Ringsdorff-Werke GmbH, 5300 Bonn SHUTDOWN BRUSH
DE4111206A1 (en) * 1991-04-06 1992-10-08 Schunk Kohlenstofftechnik Gmbh COAL BRUSH

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03043142A1 *

Also Published As

Publication number Publication date
ATE317161T1 (en) 2006-02-15
DE10155991C2 (en) 2003-12-24
WO2003043142A1 (en) 2003-05-22
DE50205764D1 (en) 2006-04-13
EP1444757B1 (en) 2006-02-01
DE10155991A1 (en) 2003-06-05
CN1586027A (en) 2005-02-23

Similar Documents

Publication Publication Date Title
DE102016206833B4 (en) Mat sealing cover of a waterproof connector
EP1238451B1 (en) Sealing body for longitudinally split cable fittings
DE102009016756B4 (en) shield connector
DE102010023423A1 (en) Spring clamp and terminal block
DE102005063170B4 (en) Method for equipping a carbon brush with a shutdown device
WO2009106461A2 (en) Current overload protection of an electrical machine
EP1444757A1 (en) Carbon brush
DE3641224A1 (en) THEFT-PROOF ELECTRIC CABLE
EP2198490B1 (en) Brush arrangement and electric machine, in particular electric domestic appliance
EP1728310A1 (en) Long stator comprising a ground conductor and maglev railway that is equipped with said stator
DE19922139B4 (en) A method of mounting a flat cable to a connector, a connector for a flat cable, and a component for exciting ultrasonic vibrations for use in this method
EP3756246A1 (en) Electrical charging assembly for charging electric vehicles
DE102010031415A1 (en) Carbon brush for drilling machine, has strand retainer for retaining strand end of current-carrying strand, and signaling strand formed as contact conductor for switching-off function such that shots in body are formed as strand shots
EP3788707A1 (en) Potential equalisation system for a modular multilevel converter
DE102005062073A1 (en) Carbon brush arrangement, e.g. for electric motor, has plate or disk-shaped electrically conducting contact element emanating from rear end of carbon brush and connected to current feed
DE69933155T2 (en) rotary switch
DE60033887T2 (en) Compact branch connector
DE102020111359A1 (en) Contact-protected connection arrangement of two electrical conductors and a motor vehicle with such a connection arrangement
EP3015359B1 (en) Device for fixing and making electrical contact between a cladding element of an aircraft and a support structure
DE3238949C2 (en) Device for testing cables with plugs
DE102011087788A1 (en) Electric machine
DE202004000419U1 (en) Screwless conductor connection terminal
DE102009040343A1 (en) Connecting unit for electrical machine of transmission for motor vehicle, has electrically conductive flat element electrically coupled with coil of stator of electrical machine, and contact socket welded at flat element
DE102016116127A1 (en) Modular system with several electrically connectable modules
EP1913677B1 (en) Portable power tool

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040513

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060201

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50205764

Country of ref document: DE

Date of ref document: 20060413

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: LUCHS & PARTNER PATENTANWAELTE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060501

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060501

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060512

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060510

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060703

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061030

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SK

Payment date: 20061031

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20061101

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20061123

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20061128

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20061130

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20061103

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20070212

Year of fee payment: 5

EN Fr: translation not filed
BERE Be: lapsed

Owner name: SCHUNK KOHLENSTOFFTECHNIK G.M.B.H.

Effective date: 20061130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070323

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061113

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071130

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071113

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071113

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071113