EP0403897A1 - Carbon brush holder - Google Patents
Carbon brush holder Download PDFInfo
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- EP0403897A1 EP0403897A1 EP90110924A EP90110924A EP0403897A1 EP 0403897 A1 EP0403897 A1 EP 0403897A1 EP 90110924 A EP90110924 A EP 90110924A EP 90110924 A EP90110924 A EP 90110924A EP 0403897 A1 EP0403897 A1 EP 0403897A1
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- EP
- European Patent Office
- Prior art keywords
- carbon brush
- brush holder
- plastic
- holding body
- holder according
- Prior art date
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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
- H01R39/40—Brush holders enabling brush movement within holder during current collection
Definitions
- the invention relates to a carbon brush holder for in particular direct current motors and three-phase slip ring rotor motors comprising a holding body with at least one receptacle with guides for a carbon brush, a pressure bracket acting on the latter, which is under spring preload, and a metallic connecting strip.
- a corresponding carbon brush holder can be found, for example, in DE-OS 31 21 938.
- a carbon brush holder in this regard - like that of the present invention - is intended for larger size electrical machines. Motors of sizes 132 and larger come into question.
- carbon brushes are used, which have a cross section of 10x16 mm2 or more. So that the known carbon brush holder can withstand the loads occurring in large machines, it is necessary that the guides for the carbon brushes consist of metallic profiles, which in turn are pressed into a plastic body.
- a construction in this regard shows the advantage over the holding body, which is made entirely of brass, that weight is saved and vibration behavior is more favorable, without, however, offering great simplifications in terms of production technology; because there are at least different ones Manufacturing steps, on the one hand for the guides for the carbon brush and on the other hand for the holding body itself, required.
- the pressure brackets used on the carbon brushes are made of metal, so care must be taken that the mounting of the pressure bracket pins is adapted to ensure that the pressure bracket can be pivoted sufficiently easily even at different temperatures.
- the object of the present invention is to provide a carbon brush holder of the type mentioned at the outset for larger machines, in particular size 132 motors, which can be produced inexpensively and which permit a largely universal use.
- the object is essentially achieved in that the pressure bracket and the integrally formed with the guides holding body made of plastic.
- Suitable materials here are, in particular, thermosetting or thermoplastic plastics and / or fiber-reinforced plastics, the latter being able to have glass fibers or carbon fibers, the volume fraction of which can be up to 50%.
- the proposal according to the invention consequently e.g. produced by spraying the holding body, which is directly suitable for inserting the carbon brushes. Consequently, the metal guides provided in the prior art for larger machines are not required, so that there is a simplification in terms of production technology. It is also not necessary to take into account the different expansion coefficients of the connecting materials.
- the holding body is made of all-plastic material results in an improved vibration behavior of the carbon brush holder, so that there is an improvement in running and noise reduction in the machines which are equipped with the carbon brush holders according to the invention.
- the pressure bracket is also made of plastic, special measures for connecting the parts to one another are not necessary. In particular, if the plastic materials used are the same, there is no need to pay attention to different expansion coefficients.
- the holding body has a retracted bottom surface that has one with at least one Stop surface of the pressure bracket has an interactive projection such as stop pin.
- the spring element can be fastened to the pressure bracket via a molded-on pin or via a spring support bolt which can be inserted into a slot of the pressure bracket and which, in turn, preferably also consists of plastic.
- a carbon brush holder is shown in plan view, which consists of a completely plastic holding body (1), on one end of which an angled terminal block (3) is arranged, via which the electrical connection with in guides (7) limited recesses (8) insertable carbon brushes (29) is produced via strands, not shown, which can be fixed in threaded holes (12) by means of screws.
- Pressure brackets (2) which also consist entirely of plastic, act on the carbon brushes (29).
- the pressure brackets have integrally formed bearing journals (19) which can be introduced into bearings (25) formed by wall sections as counter-shells.
- the shells (25) In order to prevent the pressure bracket (2) from being pulled out in an uncontrolled manner, the shells (25) have an opening with a clear width which is slightly smaller than the diameter of the bearing journal (19). According to FIG. 5, the opening in the bearing (25) is constricted by a projection (26) referred to as locking knobs.
- a fastening element such as suspension bolts (4) is a spring element such as a coil tension spring (5) with its other end a spring hanger pin (6) is gripped, which can be inserted into a slot (18) extending in the direction of the holding body (1) in the pressure bracket (2).
- the spring suspension bolt is formed as an integral part of a pressure bracket (21), which is also made of plastic.
- a pull-back lever (16) is provided, which is also made of plastic as an integral part of the pressure bracket (2).
- a protrusion such as a stop pin (14) starts from a retracted bottom surface (30), which in the exemplary embodiment according to FIG. 2 interacts with stop surfaces (20) and (27), the former pivoting outwards and the latter the movement in the recess (8) of the holding body (1) for the carbon brush (29) is limited, which ensures that the pressure bracket (2) worn carbon brushes (29) can not push out of the recess (8), thereby reducing the risk of Damage to the rotating machine parts would occur.
- a stop surface (17) is provided on the pressure bracket (2), which interacts with the edge of the recess (8), that is to say with the holding body (1) when the carbon brush (29) is worn.
- a fastening pocket (9) is formed on a side wall of the carrier body (1) and has a T-shaped groove (11) for a fastening screw in order to fasten the carrier body to a brush holder carrier ring (not shown) or the like.
- the L-shaped and electrically conductive terminal strip (3) is detachably attached to the end wall (22) of the holding body (1) adjacent to the cutouts (8).
- fastening projections and lugs (13) start from the side edges of the leg (23) extending along the wall (22) and engage in corresponding recesses in cuboid reinforcements (31) in the edge of the holding body (1).
- connection strip (3) is braced in that elevations such as webs (24) extend from the wall (22) and act on the leg (23) in such a way that the connection strip (3) is attached to the fastening lugs ( 13) is fixed in the assigned recesses of the holding body (1).
- thermosetting or thermoplastic plastics are particularly suitable as plastics.
- Plastics reinforced with glass fibers or carbon fibers can also be used, the fiber content being up to 50% by volume.
- the use of the plastic not only saves weight, but also improves the vibration properties compared to carbon brush holders made of brass.
- insulation is not required when installing carbon brush holders according to the invention, since they consist entirely of insulating material.
Abstract
Description
Die Erfindung bezieht sich auf einen Kohlebürstenhalter für insbesondere Gleichstrommotore und Drehstrom-SchleifringLäufermotore umfassend einen Haltekörper mit zumindest einer Aufnahme mit Führungen für eine Kohlebürste, einen auf diese einwirkenden, unter Federvorspannung stehenden Druckbügel sowie einer metallischen Anschlußleiste.The invention relates to a carbon brush holder for in particular direct current motors and three-phase slip ring rotor motors comprising a holding body with at least one receptacle with guides for a carbon brush, a pressure bracket acting on the latter, which is under spring preload, and a metallic connecting strip.
Ein entsprechender Kohlebürstenhalter ist z.B. der DE-OS 31 21 938 zu entnehmen. Ein diesbezüglicher Kohlebürstenhalter - wie der der vorliegenden Erfindung - ist für elektrische Maschinen größerer Abmessungen bestimmt. In Frage kommen Motore der Baugrößen 132 und größer. Hierbei finden Kohlebürsten Verwendung, die einen Querschnitt von 10x16 mm² oder mehr aufweisen. Damit der bekannte Kohlebürstenhalter den bei den großen Maschinen auftretenden Belastungen standhalten kann, ist es erforderlich, daß die Führungen für die Kohlebürsten aus metallischen Profilen bestehen, die ihrerseits in einem Kunststoffkörper eingepreßt sind. Ein diesbezüglicher Aufbau zeigt zwar gegenüber der vollständig aus Messing bestehenden Haltekörper den Vorteil, daß eine Gewichtsersparnis erfolgt und ein günstigeres Schwingungsverhalten vorliegt, ohne jedoch herstellungstechnisch große Vereinfachungen zu bieten; denn es sind zumindest verschiedene Herstellungsschritte, zum einen für die Führungen für die Kohlebürste und zum anderen für den Haltekörper selbst, erforderlich.A corresponding carbon brush holder can be found, for example, in DE-OS 31 21 938. A carbon brush holder in this regard - like that of the present invention - is intended for larger size electrical machines. Motors of sizes 132 and larger come into question. Here carbon brushes are used, which have a cross section of 10x16 mm² or more. So that the known carbon brush holder can withstand the loads occurring in large machines, it is necessary that the guides for the carbon brushes consist of metallic profiles, which in turn are pressed into a plastic body. A construction in this regard shows the advantage over the holding body, which is made entirely of brass, that weight is saved and vibration behavior is more favorable, without, however, offering great simplifications in terms of production technology; because there are at least different ones Manufacturing steps, on the one hand for the guides for the carbon brush and on the other hand for the holding body itself, required.
Die verwendeten auf die Kohlebürsten einwirkende Druckbügel bestehen aus Metall, so daß darauf zu achten ist, daß die Lagerungen der Druckbügelzapfen diesen so angepaßt ist, daß auch bei unterschiedlicher Temperatur eine hinreichend leichte Verschwenkbarkeit der Druckbügel erfolgt.The pressure brackets used on the carbon brushes are made of metal, so care must be taken that the mounting of the pressure bracket pins is adapted to ensure that the pressure bracket can be pivoted sufficiently easily even at different temperatures.
Aufgabe der vorliegenden Erfindung ist es, einen Kohlebürstenhalter der eingangs genannten Art für größere Maschinen, insbesondere Motore der Baugröße 132 aufwärts zur Verfügung zu stellen, die kostengünstig herstellbar sind und einen weitgehend universellen Einsatz ermöglichen.The object of the present invention is to provide a carbon brush holder of the type mentioned at the outset for larger machines, in particular size 132 motors, which can be produced inexpensively and which permit a largely universal use.
Die Aufgabe wird erfindungsgemäß im wesentlichen dadurch gelöst, daß der Druckbügel und der einstückig mit den Führungen ausgebildete Haltekörper aus Kunststoff bestehen. Als geeignete Materialien kommen dabei insbesondere duro- oder thermoplastische Kunststoffe und/oder faserverstärkte Kunststoffe in Frage, wobei letztere Glasfasern oder Kohlenstoffasern aufweisen kann, deren Volumenanteil bis zu 50% betragen kann.The object is essentially achieved in that the pressure bracket and the integrally formed with the guides holding body made of plastic. Suitable materials here are, in particular, thermosetting or thermoplastic plastics and / or fiber-reinforced plastics, the latter being able to have glass fibers or carbon fibers, the volume fraction of which can be up to 50%.
Durch den erfindungsgemäßen Vorschlag wird folglich z.B. im Spritzverfahren der Haltekörper hergestellt, der unmittelbar zum Einsetzen der Kohlebürsten geeignet ist. Folglich sind die nach dem Stand der Technik bei größeren Maschinen vorgesehenen Metallführungen nicht erforderlich, so daß sich herstellungstechnisch eine Vereinfachung ergibt. Auch ist es nicht notwendig, daß die unterschiedlichen Ausdehnungskoeffizienten der verbindenden Materialien zu berücksichtigen sind.The proposal according to the invention consequently e.g. produced by spraying the holding body, which is directly suitable for inserting the carbon brushes. Consequently, the metal guides provided in the prior art for larger machines are not required, so that there is a simplification in terms of production technology. It is also not necessary to take into account the different expansion coefficients of the connecting materials.
Durch die Verwendung von Kunststoff ergibt sich eine erkennbare Gewichtsreduzierung im Vergleich zu solchen aus Messing. Andere Isolationen, wie sie bei aus Messing bestehenden Haltekörpern notwendig sind, werden nicht benötigt, da der Haltekörper selbst ein Isolator ist.The use of plastic results in a noticeable reduction in weight compared to brass. Other insulations, such as are necessary with brass holding bodies, are not required since the holding body itself is an insulator.
Dadurch, daß der Haltekörper aus Vollkunststoff besteht, ergibt sich ein verbessertes Schwingungsverhalten des Kohlebürstenhalters, so daß eine Laufverbesserung und Geräuschminderung bei den Maschinen gegeben ist, die mit den erfindungsgemäßen Kohlebürstenhaltern bestückt sind.The fact that the holding body is made of all-plastic material results in an improved vibration behavior of the carbon brush holder, so that there is an improvement in running and noise reduction in the machines which are equipped with the carbon brush holders according to the invention.
Da der Druckbügel gleichfalls aus Kunststoff besteht, sind besondere Maßnahmen zum Verbinden der Teile untereinander nicht erforderlich. Insbesondere muß dann, wenn die verwendeten Kunststoffmaterialien gleich sind, nicht auf unterschiedliche Ausdehnungskoeffizienten geachtet werden.Since the pressure bracket is also made of plastic, special measures for connecting the parts to one another are not necessary. In particular, if the plastic materials used are the same, there is no need to pay attention to different expansion coefficients.
Um die Schwenkbewegung des Druckbügels zu begrenzen, um also insbesondere sicherzustellen, daß der Druckbügel nicht in einem Umfang auf die Kohlebürste einwirken kann, daß diese aus der Führung herausgedrückt wird, ist vorgesehen, daß der Haltekörper eine eingezogene Bodenfläche aufweist, die einen mit zumindest einer Anschlagfläche des Druckbügels wechselwirkenden Vorsprung wie Anschlagzapfen aufweist.In order to limit the pivoting movement of the pressure bracket, so in particular to ensure that the pressure bracket cannot act on the carbon brush to an extent that it is pressed out of the guide, it is provided that the holding body has a retracted bottom surface that has one with at least one Stop surface of the pressure bracket has an interactive projection such as stop pin.
Die Befestigung des Federelementes an dem Druckbügel kann über einen angeformten Zapfen oder über einen in einen Schlitz des Druckbügels einbringbaren Federauflagebolzen erfolgen, der seinerseits vorzugsweise auch aus Kunststoff besteht.The spring element can be fastened to the pressure bracket via a molded-on pin or via a spring support bolt which can be inserted into a slot of the pressure bracket and which, in turn, preferably also consists of plastic.
Weitere Einzelheiten, Vorteile und Merkmale der Erfindung ergeben sich nicht nur aus den Ansprüchen, den diesen zu entnehmenden Merkmalen -für sich und/oder in Kombination-, sondern auch aus der nachfolgenden Beschreibung von der Zeichnung zu entnehmenden bevorzugten Ausführungsbeispielen.Further details, advantages and features of the invention result not only from the claims, the features to be extracted from them - individually and / or in combination - but also from the following description of preferred embodiments to be taken from the drawing.
Es zeigen:
- Fig. 1 eine Draufsicht auf einen Kohlebürstenhalter,
- Fig. 2 eine Schnittdarstellung entlang der Linie II-II in Fig. 1,
- Fig. 3 eine der Fig. 2 entsprechende Schnittdarstellung unter Verwendung eines anderen Druckbügels,
- Fig. 4 eine Detaildarstellung des Kohlebürstenhalters nach Fig. 1 im Bereich einer Stirnwandung und
- Fig. 5 einen Ausschnitt aus dem Bürstenkörper nach Fig. 1.
- 1 is a plan view of a carbon brush holder,
- 2 is a sectional view taken along the line II-II in Fig. 1,
- 3 is a sectional view corresponding to FIG. 2 using a different pressure bracket,
- Fig. 4 is a detailed view of the carbon brush holder of FIG. 1 in the region of an end wall and
- 5 shows a detail from the brush body according to FIG. 1.
In Fig. 1 ist in Draufsicht ein Kohlenbürstenhalter dargestellt, der aus einem vollständig aus Kunststoff bestehenden Haltekörper (1) besteht, an dessen einer Stirnseite eine winkelförmig ausgebildete Anschlußleiste (3) angeordnet ist, über die die elektrische Verbindung mit in von Führungen (7) begrenzten Aussparungen (8) einbringbare Kohlebürsten (29) über nicht dargestellte Litzen hergestellt wird, die in Gewindelöchern (12) mittels Schrauben festlegbar sind. Auf die Kohlebürsten (29) wirken Druckbügel (2) ein, die ebenfalls vollständig aus Kunststoff bestehen. Die Druckbügel weisen angeformte Lagerzapfen (19) auf, die in von Wandabschnitten gebildete als Gegenschalen ausgebildete Lagerungen (25) einbringbar sind. Um ein unkontrolliertes Herausziehen des Druckbügels (2) zu verhindern, weisen die Schalen (25) eine Öffnung mit einer lichten Weite auf, die geringfügig kleiner als der Durchmesser der Lagerzapfen (19) ist. Die Einschürung der Öffnung der Lagerung (25) erfolgt gemäß Fig. 5 durch ein als Arretierungsnoppen bezeichneten Vorsprung (26).In Fig. 1, a carbon brush holder is shown in plan view, which consists of a completely plastic holding body (1), on one end of which an angled terminal block (3) is arranged, via which the electrical connection with in guides (7) limited recesses (8) insertable carbon brushes (29) is produced via strands, not shown, which can be fixed in threaded holes (12) by means of screws. Pressure brackets (2), which also consist entirely of plastic, act on the carbon brushes (29). The pressure brackets have integrally formed bearing journals (19) which can be introduced into bearings (25) formed by wall sections as counter-shells. In order to prevent the pressure bracket (2) from being pulled out in an uncontrolled manner, the shells (25) have an opening with a clear width which is slightly smaller than the diameter of the bearing journal (19). According to FIG. 5, the opening in the bearing (25) is constricted by a projection (26) referred to as locking knobs.
Damit auf die Kohlebürsten (29) von den Druckhebeln (2), und zwar über deren vorderen, als Druckfinger (15) ausgebildeten Enden eine Kraft einwirkt, geht von einem Befestigungselement wie Aufhängebolzen (4) ein Federelement wie Schraubenzugfeder (5) aus, die mit ihrem anderen Ende einen Federaufhängerbolzen (6) erfaßt, der in einen sich in Richtung des Haltekörpers (1) in dem Druckbügel (2) erstreckenden Schlitz (18) einsetzbar ist. Alternativ besteht nach Fig. 3 die Möglichkeit, daß der Federaufhängebolzen als integrales Teil eines Druckbügels (21) ausgebildet ist, der gleichfalls aus Kunststoff besteht.So that a force acts on the carbon brushes (29) from the pressure levers (2), namely via their front ends designed as pressure fingers (15), a fastening element such as suspension bolts (4) is a spring element such as a coil tension spring (5) with its other end a spring hanger pin (6) is gripped, which can be inserted into a slot (18) extending in the direction of the holding body (1) in the pressure bracket (2). Alternatively, according to Fig. 3 there is the possibility that the spring suspension bolt is formed as an integral part of a pressure bracket (21), which is also made of plastic.
Um den Druckhebel von der Kohlebürste (29) abziehen zu können, ist ein Rückziehhebel (16) vorgesehen, der ebenfalls als integrales Teil des Druckbügels (2) aus Kunststoff besteht. Um die Schwenkbewegung zu begrenzen, geht von einer eingezogenen Bodenfläche (30) ein Vorsprung wie Anschlagzapfen (14) aus, der bei dem Ausführungsbeispiel nach Fig. 2 mit Anschlagflächen (20) und (27) wechselwirkt, wobei erstere die Schwenkbewegung nach außen und letztere die Bewegung in die Aussparung (8) des Haltekörpers (1) für die Kohlebürste (29) begrenzt, wodurch sichergestellt ist, daß der Druckbügel (2) verschlissene Kohlebürsten (29) nicht aus der Aussparung (8) herausdrücken kann, wodurch die Gefahr einer Beschädigung der drehenden Maschinenteile erfolgen würde. Zusätzlich ist am Druckbügel (2) eine Anschlagfläche (17) vorgesehen, die mit dem Rand der Aussparung (8), also mit dem Haltekörper (1) bei verschlissener Kohlebürste (29) wechselwirkt.In order to be able to pull the pressure lever off the carbon brush (29), a pull-back lever (16) is provided, which is also made of plastic as an integral part of the pressure bracket (2). In order to limit the pivoting movement, a protrusion such as a stop pin (14) starts from a retracted bottom surface (30), which in the exemplary embodiment according to FIG. 2 interacts with stop surfaces (20) and (27), the former pivoting outwards and the latter the movement in the recess (8) of the holding body (1) for the carbon brush (29) is limited, which ensures that the pressure bracket (2) worn carbon brushes (29) can not push out of the recess (8), thereby reducing the risk of Damage to the rotating machine parts would occur. In addition, a stop surface (17) is provided on the pressure bracket (2), which interacts with the edge of the recess (8), that is to say with the holding body (1) when the carbon brush (29) is worn.
An einer Seitenwandung des Trägerkörpers (1) ist eine Befestigungstasche (9) angeformt, die eine T-förmige Nut (11) für eine Befestigungsschraube aufweist, um den Trägerkörper an einen nicht dargestellten Bürstenhaltertragring oder ähnliches zu befestigen.A fastening pocket (9) is formed on a side wall of the carrier body (1) and has a T-shaped groove (11) for a fastening screw in order to fasten the carrier body to a brush holder carrier ring (not shown) or the like.
An der den Aussparungen (8) angrenzenden Stirnwandung (22) des Haltekörpers (1) ist die L-förmig ausgebildete und elektrisch leitende Anschlußleiste (3) lösbar befestigt. Hierzu gehen von den Seitenrändern des sich entlang der Wandung (22) erstreckenden Schenkels (23) Befestigungsvorsprünge wie -nasen (13) aus, die in entsprechende Aussparungen in quaderförmigen Verstärkungen (31) im Rand des Haltekörpers (1) eingreifen.The L-shaped and electrically conductive terminal strip (3) is detachably attached to the end wall (22) of the holding body (1) adjacent to the cutouts (8). For this purpose, fastening projections and lugs (13) start from the side edges of the leg (23) extending along the wall (22) and engage in corresponding recesses in cuboid reinforcements (31) in the edge of the holding body (1).
Um ein Schwingen der Anschlußleiste (3) auszuschließen, wird diese dadurch verspannt, daß von der Wandung (22) Erhebungen wie Stege (24) ausgehen, die auf den Schenkel (23) derart einwirken, daß die Anschlußleiste (3) über die Befestigungsnasen (13) in den zugeordneten Ausnehmungen des Haltekörpers (1) festgelegt wird.In order to prevent the connection strip (3) from vibrating, the connection strip (3) is braced in that elevations such as webs (24) extend from the wall (22) and act on the leg (23) in such a way that the connection strip (3) is attached to the fastening lugs ( 13) is fixed in the assigned recesses of the holding body (1).
Der erfindungsgemäße Kohlebürstenhalter mit dem vollständig aus Kunststoff bestehenden Haltekörper und dem gleichfalls aus Kunststoff bestehenden Druckbügel ist für große Maschinen, insbesondere Motore ab der Baugröße 132 einsetzbar. Dabei gelangen Kohlebürsten der Querschnitte 10x16 mm² oder mehr zum Einsatz.The carbon brush holder according to the invention with the holding body made entirely of plastic and the pressure bracket likewise made of plastic can be used for large machines, in particular motors, from size 132. Carbon brushes with cross sections of 10x16 mm² or more are used.
Ist im Ausführungsbeispiel ein Kohlebürstenhalter mit drei Aufnahmen (8) für Kohlebürsten dargestellt, so ist die erfindungsgemäße Lehre gleichfalls auf Kohlebürsten mit einer abweichenden Anzahl von Ausnehmungen anwendbar.If a carbon brush holder with three receptacles (8) for carbon brushes is shown in the exemplary embodiment, the teaching according to the invention can also be applied to carbon brushes with a different number of recesses.
Als Kunststoffe eignen sich insbesondere duro- oder thermoplastische Kunststoffe. Auch mit Glasfasern oder Kohlestoffasern verstärkte Kunststoffe können verwendet werden, wobei der Faseranteil bis zu 50 Vol. % betragen kann.Thermosetting or thermoplastic plastics are particularly suitable as plastics. Plastics reinforced with glass fibers or carbon fibers can also be used, the fiber content being up to 50% by volume.
Durch die Verwendung des Kunststoffes ergeben sich neben Gewichtsersparnissen im Vergleich zu Kohlebürstenhalter aus Messing verbesserte Schwingungseigenschaften. Auch sind zusätzlich Isolationen beim Einbau von erfindungsgemäßen Kohlebürstenhaltern nicht erforderlich, da diese vollständig aus isolierendem Material bestehen.The use of the plastic not only saves weight, but also improves the vibration properties compared to carbon brush holders made of brass. In addition, insulation is not required when installing carbon brush holders according to the invention, since they consist entirely of insulating material.
Claims (8)
dadurch gekennzeichnet,
daß der Druckbügel (2) und der einstückig mit den Führungen (7) ausgebildete Haltekörper (1) aus Kunststoff bestehen.1. Carbon brush holder for direct current machines and three-phase slip ring rotor motors, in particular of a large design, comprising a holding body with at least one receptacle with guides for a carbon brush, a pressure bracket acting on the latter, which is under spring preload, and a metallic connecting strip,
characterized,
that the pressure bracket (2) and the integrally formed with the guides (7) holding body (1) consist of plastic.
dadurch gekennzeichnet,
daß der Kunststoff duro- oder thermoplastischer Kunststoff ist.2. carbon brush holder according to claim 1,
characterized,
that the plastic is thermosetting or thermoplastic.
dadurch gekennzeichnet,
daß der Kunststoff faserverstärkt ist.3. carbon brush holder according to at least one of the preceding claims,
characterized,
that the plastic is fiber-reinforced.
dadurch gekennzeichnet,
daß der Kunststoff mit Glasfasern oder Kohlenstoffasern verstärkt ist, wobei deren Anteil bis 50 Vol. % beträgt.4. Carbon brush holder according to at least one of the preceding claims,
characterized,
that the plastic is reinforced with glass fibers or carbon fibers, the proportion of which is up to 50% by volume.
dadurch gekennzeichnet,
daß entlang einer Stirnwandung (22) ein Schenkel (23) der L-förmig ausgebildeten Anschlußleiste (3) verläuft, die über Rastvorsprünge wie -nasen (13) in zugeordnete Aussparungen des Haltekörpers (1) zum lösbaren Festlegen eingreifen.5. carbon brush holder according to at least claim 1,
characterized,
that a leg (23) of the L-shaped terminal strip (3) runs along an end wall (22), which engage via latching projections and tabs (13) in associated recesses in the holding body (1) for releasable fixing.
dadurch gekennzeichnet,
daß von der Stirnwandung (22) stegartige Vorsprünge (24) ausgehen und zum Verspannen der Anschlußleiste (3) sich in Richtung des Schenkels (23) erstrecken.6. carbon brush holder according to claim 5,
characterized,
that web-like projections (24) extend from the end wall (22) and extend in the direction of the leg (23) for bracing the terminal block (3).
dadurch gekennzeichnet,
daß von einer eingezogenen Fläche (30) des Haltekörpers (1) ein mit zumindest einer Anschlagfläche (20, 27) des Druckbügels (2) wechselwirkender Vorsprung (14) wie Anschlagzapfen ausgeht.7. carbon brush holder according to at least claim 1,
characterized,
that from a retracted surface (30) of the holding body (1) interacts with at least one stop surface (20, 27) of the pressure bracket (2) projection (14) like stop pin.
dadurch gekennzeichnet,
daß der Druckbügel (2) einen in Richtung des Haltekörpers (1) verlaufenden Schlitz (18) aufweist, in den ein aus Kunststoff bestehender Federaufhängebolzen (6) einsetzbar ist.8. carbon brush holder according to at least claim 1,
characterized,
that the pressure bracket (2) has a slot (18) running in the direction of the holding body (1), into which a spring suspension bolt (6) made of plastic can be inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90110924T ATE80251T1 (en) | 1989-06-20 | 1990-06-09 | CARBON BRUSHHOLDER. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3920147 | 1989-06-20 | ||
| DE3920147A DE3920147A1 (en) | 1989-06-20 | 1989-06-20 | CARBON BRUSH HOLDER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0403897A1 true EP0403897A1 (en) | 1990-12-27 |
| EP0403897B1 EP0403897B1 (en) | 1992-09-02 |
Family
ID=6383142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90110924A Expired - Lifetime EP0403897B1 (en) | 1989-06-20 | 1990-06-09 | Carbon brush holder |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0403897B1 (en) |
| AT (1) | ATE80251T1 (en) |
| DE (2) | DE3920147A1 (en) |
| ES (1) | ES2034801T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997015099A1 (en) * | 1995-10-18 | 1997-04-24 | Ate Industriale S.R.L. | Brush-holder with wear detection device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10055326A1 (en) * | 2000-11-08 | 2002-05-16 | Buhler Motor Gmbh | Commutator motor comprises electrically conductive springs which provide a required pressure on the carbon brushes, and are provided with insulation at least over a section nearest to the motor housing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8201699U1 (en) * | 1982-01-25 | 1982-07-01 | Fa. Bohnenblust & Dietrich, 7893 Jestetten | Device for holding contact brushes |
| DE3121938A1 (en) * | 1981-06-03 | 1983-01-05 | Heid & Co, GmbH, KG, Kohlebürsten- und Bürstenhalterfabrik, 6730 Neustadt | Carbon-brush holder |
| DE8234555U1 (en) * | 1982-12-09 | 1983-05-19 | Heid & Co, GmbH, KG, Kohlebürsten- und Bürstenhalterfabrik, 6730 Neustadt | Carbon brush holder |
| EP0180773A1 (en) * | 1984-10-03 | 1986-05-14 | Nippondenso Co., Ltd. | Brush holding device for rotating electrical machines |
| DE8716991U1 (en) * | 1987-12-24 | 1988-03-31 | Schunk Metall Und Kunststoff Gmbh, 6301 Wettenberg, De |
-
1989
- 1989-06-20 DE DE3920147A patent/DE3920147A1/en not_active Withdrawn
-
1990
- 1990-06-09 EP EP90110924A patent/EP0403897B1/en not_active Expired - Lifetime
- 1990-06-09 AT AT90110924T patent/ATE80251T1/en not_active IP Right Cessation
- 1990-06-09 DE DE9090110924T patent/DE59000284D1/en not_active Expired - Fee Related
- 1990-06-09 ES ES199090110924T patent/ES2034801T3/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3121938A1 (en) * | 1981-06-03 | 1983-01-05 | Heid & Co, GmbH, KG, Kohlebürsten- und Bürstenhalterfabrik, 6730 Neustadt | Carbon-brush holder |
| DE8201699U1 (en) * | 1982-01-25 | 1982-07-01 | Fa. Bohnenblust & Dietrich, 7893 Jestetten | Device for holding contact brushes |
| DE8234555U1 (en) * | 1982-12-09 | 1983-05-19 | Heid & Co, GmbH, KG, Kohlebürsten- und Bürstenhalterfabrik, 6730 Neustadt | Carbon brush holder |
| EP0180773A1 (en) * | 1984-10-03 | 1986-05-14 | Nippondenso Co., Ltd. | Brush holding device for rotating electrical machines |
| DE8716991U1 (en) * | 1987-12-24 | 1988-03-31 | Schunk Metall Und Kunststoff Gmbh, 6301 Wettenberg, De |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997015099A1 (en) * | 1995-10-18 | 1997-04-24 | Ate Industriale S.R.L. | Brush-holder with wear detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3920147A1 (en) | 1991-01-10 |
| ES2034801T3 (en) | 1993-04-01 |
| DE59000284D1 (en) | 1992-10-08 |
| EP0403897B1 (en) | 1992-09-02 |
| ATE80251T1 (en) | 1992-09-15 |
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