EP1512200A1 - Commutator for electric motors - Google Patents

Commutator for electric motors

Info

Publication number
EP1512200A1
EP1512200A1 EP03717114A EP03717114A EP1512200A1 EP 1512200 A1 EP1512200 A1 EP 1512200A1 EP 03717114 A EP03717114 A EP 03717114A EP 03717114 A EP03717114 A EP 03717114A EP 1512200 A1 EP1512200 A1 EP 1512200A1
Authority
EP
European Patent Office
Prior art keywords
collector
cylinders
electrically conductive
rings
commutator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03717114A
Other languages
German (de)
French (fr)
Inventor
Michael Habele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1512200A1 publication Critical patent/EP1512200A1/en
Withdrawn legal-status Critical Current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
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/28—Roller contacts; Ball contacts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly

Definitions

  • the present invention relates to a commutator for electric motors, which has a cylindrical collector and contacting means which are arranged on a motor armature shaft and which, during rotation of the collector, touch at least two of a plurality of contact blades present on the collector and thus an electrical connection between the relevant contact blades and external ones Make power connections.
  • Such a commutator in which carbon brushes grind on the slats of the collector and thus transmit a direct current into the armature windings, is known, for example, from DE 197 52 626 AI.
  • Such commutators equipped with carbon brushes are usually used for DC motors or universal motors.
  • Such commutators have the disadvantage that they are very subject to wear, which considerably reduces the service life of an electric motor unless the carbon brushes are replaced.
  • the interchangeability of the carbon brushes requires a relatively high level of design effort.
  • As an alternative solution to such wear-prone mechanical commutators there are electrical machines that are commutated purely electrically. The electronic circuits required for electrical commutation are relatively complex and therefore expensive.
  • the invention is therefore based on the object of specifying a commutator for electric motors of the type mentioned at the outset. works purely mechanically, but is still very low-wear.
  • the collector of the motor has contacting means which, during rotation of the collector, touch at least two of a plurality of contact lamellae present on the collector and thus establish an electrical connection between the relevant contact lamellae and external power connections.
  • the contacting means consist of at least two electrically conductive cylinders arranged one behind the other in the axial direction of the collector, whose longitudinal axes are parallel to the longitudinal axis of the collector.
  • the at least two cylinders are positioned relative to the collector and have a diameter such that the collector rolls over the inner surfaces or the outer surfaces of the at least two cylinders as it rotates, and each of the existing cylinders is only touched by one lamella of the collector.
  • the parts belonging to the commutator are subject to extremely low wear.
  • no replacement of parts is required during its entire service life, as is the case with a commutator with carbon brushes.
  • the probability of failure in the mechanical commutator according to the invention is even lower than in the case of an electrically commutated motor, because electrical components of the commutation circuit are subject to a certain probability of failure.
  • An advantageous embodiment of the electrically conductive cylinders is that they are mounted eccentrically with respect to the longitudinal axis of the collector.
  • the electrically conductive cylinders are designed as roller bearings, each with an inner ring and an outer ring.
  • the roller bearings enclose the collector and the inner rings of the roller bearings over which the collector rolls are rotatably supported and the outer rings are fixed.
  • the electrically conductive cylinders are also designed as roller bearings, each with an inner ring and an outer ring.
  • the roller bearings are arranged inside the collector and the outer rings of the roller bearings, over which the collector rolls, are rotatably mounted and the inner rings are fixed.
  • Means which establish an electrical connection between the fixed inner rings or outer rings of the roller bearings and external power connections.
  • the means for the electrical connection between the fixed outer and inner rings of the rolling bearings and the external power connections preferably consist of pins that can be screwed from the outside through one or more receptacles that fix the outer or men rings so that the pin ends on the réelletial Butt inner rings. Because the electrically conductive cylinders are resiliently supported in the radial direction relative to their longitudinal axis, asymmetries can be compensated in a simple manner due to the manufacturing tolerances of the collector.
  • pins which make an electrical contact and which strike the outer and inner rings of the electrically conductive cylinders press the cylinders against the collector, whereby the pins simultaneously perform an electrical and a mechanical function.
  • FIG. 1 shows a longitudinal section through a commutator with two cylinders surrounding the collector
  • Figure 2 is a front view
  • Figure 3 is a rear view of the commutator shown in Figure 1 and
  • Figure 4 is a front view of a commutator with two cylinders arranged within the collector.
  • FIG. 1 shows a longitudinal section through a commutator of an electric motor, which is, for example, a direct current motor or a universal motor.
  • the commutator has a collector 1 which is mounted rotatably about a longitudinal axis 2, which longitudinal axis coincides with the axis of rotation of the rotor of the electric motor, which rotor, not shown in the drawing, accommodates a plurality of armature windings.
  • the collector 1 has in a known manner on its outer circumference a plurality of fins 3 which are electrically connected to the armature windings and via which a current is supplied to the armature windings.
  • the following description shows the means by which one or more slats 3 of the collector 1 are supplied with current and the current is derived again from one or more other slats 3 of the collector 1.
  • These current supply and discharge contact means can be seen in the cross section through the commutator shown in FIG. 1, the structure of the Contact means is also illustrated by the front view A shown in FIG. 2 and by the rear view B of the commutator shown in FIG. 3.
  • the contact means consist of two electrically conductive cylinders 4 and 5 arranged one behind the other in the axial direction of the collector 1.
  • the electrically conductive cylinder 4 is rotatably mounted about a longitudinal axis 6 and the electrically conductive cylinder 5 is rotatable about a longitudinal axis 7, the two longitudinal axes 5 and 6 of the two cylinders 4 and 5 are eccentric with respect to the longitudinal axis 2 of the collector 1.
  • Both longitudinal axes 6 and 7 of the two electrically conductive cylinders 4 and 5 are offset from the longitudinal axis 2 of the collector 1 by the same distance.
  • the electrically conductive cylinder 4 is designed as a roller bearing, each with an inner ring 8 and an outer ring 9, and between the sleeve ring 8 and the outer ring 9 there are balls, rollers or needles 10 which prevent the inner ring 8 and the outer ring 9 from rotating relative to one another enable common longitudinal axis 6.
  • the electrically conductive cylinder 5 is constructed in the same way as the electrically conductive cylinder 4. It also consists of an inner ring 11, an outer ring 12 and between the two balls, rollers or needles 13.
  • the two cylinders 4 and 5 arranged one behind the other in the axial direction are held by a housing 14 concentrically surrounding the collector 1.
  • the housing 14 is preferably made of an electrically insulating material.
  • the outer rings 9 and 12 of the two electrically conductive cylinders 4 and 5 are fixed in the housing 14.
  • the two electrically conductive cylinders 4 and 5 are resiliently mounted in the housing 14 in the radial direction relative to their longitudinal axes 5 and 6.
  • the resilient mounting of the two cylinders 4 and 5 can take place, for example, by means of a rubber ring 15 or 16 inserted between the outer ring 9 or 12 of the cylinder 5 or 6 and the inner wall of the housing 14.
  • the resilient rings 15 and 16 can also consist of another elastic material instead of rubber.
  • a contact ring 17 and 18, which consists of an electrically conductive material, is preferably inserted between each outer ring 9 or 12 of the cylinder 4 or 5 and the rubber ring 15 or 16 surrounding it.
  • the contact rings 17 and 18 resting on the outer rings 9 and 12 of the two cylinders 4 and 5 serve to electrically connect current-carrying or discharging contact pins 19 and 20 to the cylinders 4 and 5.
  • the Contact pin 19 is screwed into the housing 4 from the outside perpendicular to the longitudinal axis 6 of the electrically conductive cylinder 4. Its end protruding from the housing 14 is designed as a contact tab 21, so that the line of a power source can be connected to it.
  • the end of the contact pin 19 pointing into the interior of the housing 14 has a tapered shoulder 23 which is guided through the contact ring 17 and abuts the outer ring 9 of the cylinder 4. Thus there is a current flow via the contact pin 19, the outer ring 9, the balls, rollers or needles
  • the other contact pin 20 is constructed in the same way as the previously described contact pin 19.
  • the contact pin 20 has a contact tab 22 at its end protruding from the housing 14 and is provided with a tapered shoulder 24 with its end protruding into the housing is passed through the contact ring 18 and strikes the outer ring 12 of the cylinder 5.
  • the diameter of the inner rings 8 and 11 of the two cylinders 4 and 5 in relation to the diameter of the collector 1 should be selected such that the inner ring 8 or 11 of the cylinder 4 or 5 only touches one lamella of the collector 1.
  • the inner rings 8 and 11 of the two cylinders 4 and 5 each touch diametrically opposite lamellae of the collector 1.
  • a current is supplied to one lamella 3 of the collector 1 via one of the two cylinders 4 and 5 and is supplied via the other of the two cylinders 4 and 5 respectively 5 a current is derived from another lamella of the collector 1.
  • the electrically conductive cylinders 4 and 5 can be pressed against the spring forces generated by the rubber rings 15 and 16 on the fins 3 of the collector 1 by screwing them more or less deeply into the housing 14.
  • the collector connected to the rotor of the motor rotates about its longitudinal axis 2, the fins 3 roll over the current-carrying inner rings 8 and 11 of the two eccentrically arranged cylinders 4 and 5.
  • the collector 1 rolls on the inner rings 8 and 11 of the two cylinders 4 and 5, ie the two cylinders " 4 and 5 have a larger diameter than the collector 1, so that the two cylinders 4 and 5 surround the collector 1.
  • the collector 25 can enclose the electrically conductive cylinders 26 and 27.
  • FIG 4 is a front view of a collector 25 is shown with two electrically conductive cylinders 26 and 27 arranged in its interior, the longitudinal axes 28 and 29 of which run parallel to the longitudinal axis 30 of the collector 25 and are offset eccentrically with respect to this, for the sake of clarity, FIG Bearing and contacting means for the two electrically conductive cylinders 26 and 27.
  • the electrically conductive cylinder 26 consists of a sleeve ring 31, an outer ring 32 and balls, rollers or needles 33 mounted therebetween, and the electrically conductive cylinder 27 consists of an inner ring 34, an outer ring 35 and balls, rollers or needles 36 mounted therebetween
  • the respective sleeve rings 31 and 34 of the two electrically conductive cylinders 26 and 27 are fixed, and the outer rings 32 and 35 are rotatable relative to the inner rings 31 and 34 about the axes 28 and 29 of the electrically conductive cylinders 26 and 27.
  • the lamellae 37 of the collector 25 roll over the outer rings 32 and 35 of the two electrically conductive cylinders 26 and 27.
  • the supply and extraction of current into and out of the two electrically conductive cylinders 26 and 27 is again carried out, which is not shown in FIG. 4, by means of contact pins which are connected to the fixed inner rings 31 and 34 of the electrically conductive cylinders 26 and 27 become.
  • the motor can be operated with the electrically conductive cylinders 4, 5 or 26, 27 brake in a very simple manner, namely by braking the outer rings 9, 12 or inner rings 31, 34 running over the fins 3 or 37 of the collector 1 or 25 or rotating them in different directions.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Abstract

The invention relates to a commutator comprising a cylindrical collector (1) arranged on a motor-rotor shaft and contacting means (4, 5) which come into contact with at least two out of several contact blades (3) which are predisposed on the collector (1) during rotation of the collector (1) such that an electrical connection is established between the respective contact blades (3) and external power supply points (21, 22). The commutator is especially resistant to wear and tear such that the contacting means are made of at least two electrically conductive cylinders (4, 5) which are arranged behind each other in an axial direction of the collector (1). The longitudinal axes thereof (6, 7) are arranged parallel to the longitudinal axis (2) of the collector (1) and the at least two cylinders (4, 5) are placed relative to the collector (1) and have a diameter such that the collector (1) rolls off the at least two cylinders (4, 5) during the rotation thereof via the internal surfaces (8) or the external surfaces and each of the provided cylinders (4, 5) exclusively comes into contact with a blade (3) of the collector (3).

Description

Kommutator für ElektromotorenCommutator for electric motors
Stand der TechnikState of the art
Die vorliegende Erfindung betrifft einen Kommutator für Elektromotoren, der einen auf einer Motor-Ankerwelle angeordneten zylinderförmigen Kollektor und Kontaktierungsmittel aufweist, welche während einer Rotation des Kollektors mindestens jeweils zwei von mehreren am Kollektor vorhandenen Kontaktlamellen berühren und damit eine elektrische Verbindung zwischen den betreffenden Kontaktlamellen und externen Stromanschlüssen herstellen.The present invention relates to a commutator for electric motors, which has a cylindrical collector and contacting means which are arranged on a motor armature shaft and which, during rotation of the collector, touch at least two of a plurality of contact blades present on the collector and thus an electrical connection between the relevant contact blades and external ones Make power connections.
Ein derartiger Kommutator, bei dem Kohlebürsten auf den Lamellen des Kollektors schleifen und so einen Gleichstrom in die Ankerwicklungen übertragen, ist zum Beispiel aus der DE 197 52 626 AI bekannt. Solche mit Kohlebürsten ausgestattete Kommutatoren werden üblicher Weise für Gleichstrommotoren bzw. Universalmotoren eingesetzt. Derartige Kommutatoren haben den Nachteil, dass sie sehr verschleißbehaftet sind, womit sich die Lebensdauer eines Elektromotors erheblich verringert, sofern die Kohlebürsten nicht ausgewechselt werden. Die Auswechselbarkeit der Kohlebürsten erfordert einen relativ hohen konstruktiven Aufwand. Als alternative Lösung zu solch verschleißbehafteten mechanischen Kommutatoren gibt es elektrische Maschinen, die rein elektrisch kommutiert werden. Die für die elektrische Kommutierung erforderlichen elektronischen Schaltungen sind relativ aufwendig und damit kostenintensiv.Such a commutator, in which carbon brushes grind on the slats of the collector and thus transmit a direct current into the armature windings, is known, for example, from DE 197 52 626 AI. Such commutators equipped with carbon brushes are usually used for DC motors or universal motors. Such commutators have the disadvantage that they are very subject to wear, which considerably reduces the service life of an electric motor unless the carbon brushes are replaced. The interchangeability of the carbon brushes requires a relatively high level of design effort. As an alternative solution to such wear-prone mechanical commutators, there are electrical machines that are commutated purely electrically. The electronic circuits required for electrical commutation are relatively complex and therefore expensive.
Der Erfindung liegt daher die Aufgabe zu Grunde, einen Kommutator für Elektromotoren der eingangs genannten Art anzugeben, der. rein mechanisch arbeitet, aber trotzdem sehr verschleißarm ist.The invention is therefore based on the object of specifying a commutator for electric motors of the type mentioned at the outset. works purely mechanically, but is still very low-wear.
Vorteile der ErfindungAdvantages of the invention
Die genannte Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst. Dabei weist der Kollektor des Motors Kontaktierungsmittel auf, welche während einer Rotation des Kollektors mindestens jeweils zwei von mehreren am Kollektor vorhandenen Kontaktlamellen berühren und damit eine elektrische Verbindung zwischen den betreffenden Kontaktlamellen und externen Stromanschlüssen herstellen. Erfindungsgemäß bestehen die Kontaktierungsmitteln aus mindestens zwei in axialer Richtung des Kollektors hintereinander angeordneten, elektrisch leitenden Zylindern, deren Längsachsen parallel zur Längsachse des Kollektors liegen. Die mindestens -zwei Zylinder sind relativ zum Kollektor so platziert und haben einen solchen Durchmesser, dass der Kollektor bei seiner Rotation über die Innenflächen oder die Außenflächen der mindestens zwei Zylinder abrollt und dabei jeder der vorhandenen Zylinder immer nur von einer Lamelle des Kollektors berührt wird. Dadurch, dass der Kollektor mit seinen Lamellen auf den Zylindern abrollt und es zwischen beiden keinen Schleifkontakt gibt, unterliegen die zum Kommutator gehörenden Teile einem äußerst geringen Verschleiß. Bei einem mit einem solchen Kommutator ausgestatteten Motor ist während seiner gesamten Lebensdauer kein Teileaustausch erforderlich, so wie es bei einem Kommutator mit Kohlebürsten der Fall ist. Außerdem ist bei dem erfindungsgemäßen mechanischen Kommutator die Ausfallwahrscheinlichkeit noch geringer als bei einem elektrisch kommutierten Motor, weil elektrische Bauelemente der Kommutierungsschaltung einer gewissen Ausfallwahrscheinlichkeit unterliegen.The stated object is achieved with the features of claim 1. In this case, the collector of the motor has contacting means which, during rotation of the collector, touch at least two of a plurality of contact lamellae present on the collector and thus establish an electrical connection between the relevant contact lamellae and external power connections. According to the invention, the contacting means consist of at least two electrically conductive cylinders arranged one behind the other in the axial direction of the collector, whose longitudinal axes are parallel to the longitudinal axis of the collector. The at least two cylinders are positioned relative to the collector and have a diameter such that the collector rolls over the inner surfaces or the outer surfaces of the at least two cylinders as it rotates, and each of the existing cylinders is only touched by one lamella of the collector. Due to the fact that the collector rolls with its fins on the cylinders and there is no sliding contact between the two, the parts belonging to the commutator are subject to extremely low wear. In the case of a motor equipped with such a commutator, no replacement of parts is required during its entire service life, as is the case with a commutator with carbon brushes. In addition, the probability of failure in the mechanical commutator according to the invention is even lower than in the case of an electrically commutated motor, because electrical components of the commutation circuit are subject to a certain probability of failure.
Vorteilhafte Weiterbildungen und Ausführungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous further developments and designs of the invention emerge from the subclaims.
Eine vorteilhafte Ausführung der elektrisch leitenden Zylinder besteht darin, dass sie gegenüber der Längsachse des Kollektors exzentrisch gelagert sind.An advantageous embodiment of the electrically conductive cylinders is that they are mounted eccentrically with respect to the longitudinal axis of the collector.
In einer ersten Ausführung sind die elektrisch leitenden Zylinder als Wälzlager mit jeweils einem Innenring und einem Außenring ausgebildet. Die Wälzlager umschließen den Kollektor und die Innenringe der Wälzlager, über die der Kollektor abrollt, sind drehbar gelagert und die Außenringe stehen fest. In einer zweiten Ausführung sind die elektrisch leitenden Zylinder ebenfalls als Wälzlager mit jeweils einem Innenring und einem Außenring ausgebildet. Hier sind die Wälzlager aber im Inneren des Kollektors angeordnet und die Außenringe der Wälzlager, über die der Kollektor abrollt, sind drehbar gelagert und die Innenringe stehen fest.In a first embodiment, the electrically conductive cylinders are designed as roller bearings, each with an inner ring and an outer ring. The roller bearings enclose the collector and the inner rings of the roller bearings over which the collector rolls are rotatably supported and the outer rings are fixed. In a second embodiment, the electrically conductive cylinders are also designed as roller bearings, each with an inner ring and an outer ring. Here, however, the roller bearings are arranged inside the collector and the outer rings of the roller bearings, over which the collector rolls, are rotatably mounted and the inner rings are fixed.
Es sind Mittel vorgesehen, welche eine elektrische Verbindung zwischen den fest stehenden innenringen bzw. Außenringen der Wälzlager und externen Stromanschlüssen herstellen. Dabei bestehen die Mittel zur elektrischen Verbindung zwischen den fest stehenden Außen- bzw. Innenringen der Wälzlager und den externen Stromanschlüssen vorzugsweise aus Stiften, die von außen durch ein oder mehrere die Außen- bzw. menringe fixierende Aufnahmen schraubbar sind, so dass die Stiftenden auf die Außenbzw. Innenringe stoßen. Dadurch, dass die elektrisch leitenden Zylinder in radialer Richtung relativ zu ihrer Längsachse federnd gelagert sind, können Unsymmetrien auf Grund von Fertigungstoleranzen des Kollektors auf einfache Art und Weise ausgeglichen werden.Means are provided which establish an electrical connection between the fixed inner rings or outer rings of the roller bearings and external power connections. The means for the electrical connection between the fixed outer and inner rings of the rolling bearings and the external power connections preferably consist of pins that can be screwed from the outside through one or more receptacles that fix the outer or men rings so that the pin ends on the Außenbzw. Butt inner rings. Because the electrically conductive cylinders are resiliently supported in the radial direction relative to their longitudinal axis, asymmetries can be compensated in a simple manner due to the manufacturing tolerances of the collector.
Es ist vorteilhaft, dass die auf die Außen- bzw. Innenringe der elektrisch leitenden Zylinder stoßenden, einen elektrischen Kontakt herstellenden Stifte die Zylinder gegen den Kollektor drücken, womit die Stifte gleichzeitig eine elektrische und eine mechanische Funktion erfüllen.It is advantageous that the pins which make an electrical contact and which strike the outer and inner rings of the electrically conductive cylinders press the cylinders against the collector, whereby the pins simultaneously perform an electrical and a mechanical function.
Zeichnungdrawing
Anhand mehrerer in der Zeichnung dargestellter Ausführungsbeispiele wird nachfolgend die Erfindung näher erläutert. Es zeigen:The invention is explained in more detail below with the aid of several exemplary embodiments shown in the drawing. Show it:
Figur 1 einen Längsschnitt durch einen Kommutator mit zwei den Kollektor umgebenden Zylindern, Figur 2 eine Vorderansicht und1 shows a longitudinal section through a commutator with two cylinders surrounding the collector, Figure 2 is a front view and
Figur 3 eine Rückansicht des in Figur 1 dargestellten Kommutators undFigure 3 is a rear view of the commutator shown in Figure 1 and
Figur 4 eine Frontansicht eines Kommutators mit zwei innerhalb des Kollektors angeordneten Zylindern.Figure 4 is a front view of a commutator with two cylinders arranged within the collector.
Beschreibung von AusführungsbeispielenDescription of exemplary embodiments
Die Figur 1 zeigt einen Längsschnitt durch einen Kommutator eines Elektromotors, der zum Beispiel ein Gleichstrommotor bzw. ein Universalmotor ist. Der Kommutator weist einen Kollektor 1 auf, der um eine Längsachse 2 rotierbar gelagert ist, welche Längsachse mit der Rotationsachse des in der Zeichnung nicht dargestellten, mehrere Ankerwicklungen aufnehmenden Rotors des Elektromotors zusammenfällt. Der Kollektor 1 hat in bekannter Weise an seinem äußeren Umfang mehrere Lamellen 3, die mit den Ankerwicklungen elektrisch verbunden sind und über die den Ankerwicklungen ein Strom zugeführt wird. Mit welchen Mitteln einer oder mehreren Lamellen 3 des Kollektors 1 ein Strom zugeführt wird und aus ein oder mehreren anderen Lamellen 3 des Kollektors 1 der Strom wieder abgeleitet wird, gibt die folgende Beschreibung wieder. Diese stromzu- und abführenden Kontaktmittel kann man dem in der Figur 1 dargestellten Querschnitt durch den Kommutator entnehmen, wobei der Aufbau der Kontaktmittel auch durch die in der Figur 2 dargestellte Vorderansicht A und durch die in der Figur 3 dargestellte Rückansicht B des Kommutators verdeutlicht wird.FIG. 1 shows a longitudinal section through a commutator of an electric motor, which is, for example, a direct current motor or a universal motor. The commutator has a collector 1 which is mounted rotatably about a longitudinal axis 2, which longitudinal axis coincides with the axis of rotation of the rotor of the electric motor, which rotor, not shown in the drawing, accommodates a plurality of armature windings. The collector 1 has in a known manner on its outer circumference a plurality of fins 3 which are electrically connected to the armature windings and via which a current is supplied to the armature windings. The following description shows the means by which one or more slats 3 of the collector 1 are supplied with current and the current is derived again from one or more other slats 3 of the collector 1. These current supply and discharge contact means can be seen in the cross section through the commutator shown in FIG. 1, the structure of the Contact means is also illustrated by the front view A shown in FIG. 2 and by the rear view B of the commutator shown in FIG. 3.
Die Kontaktmittel bestehen aus zwei in axialer Richtung des Kollektors 1 hintereinander angeordneten, elektrisch leitenden Zylindern 4 und 5. Der elektrisch leitende Zylinder 4 ist um eine Längsachse 6 und der elektrisch leitende Zylinder 5 um eine Längsachse 7 rotierbar gelagert, wobei die beiden Längsachsen 5 und 6 der beiden Zylinder 4 und 5 gegenüber der Längsachse 2 des Kollektors 1 exzentrisch liegen. Beide Längsachsen 6 und 7 der beiden elektrisch leitenden Zylinder 4 und 5 sind gegenüber der Längsachse 2 des Kollektors 1 um den gleichen Abstand versetzt.The contact means consist of two electrically conductive cylinders 4 and 5 arranged one behind the other in the axial direction of the collector 1. The electrically conductive cylinder 4 is rotatably mounted about a longitudinal axis 6 and the electrically conductive cylinder 5 is rotatable about a longitudinal axis 7, the two longitudinal axes 5 and 6 of the two cylinders 4 and 5 are eccentric with respect to the longitudinal axis 2 of the collector 1. Both longitudinal axes 6 and 7 of the two electrically conductive cylinders 4 and 5 are offset from the longitudinal axis 2 of the collector 1 by the same distance.
Der elektrisch leitende Zylinder 4 ist als Wälzlager mit jeweils einem Innenring 8 und einem Außenring 9 ausgebildet, und zwischen dem hmenring 8 und dem Außenring 9 befinden sich Kugeln, Walzen oder Nadeln 10, welche ein gegenseitiges Verdrehen des Innenrings 8 und des Außenrings 9 um die gemeinsame Längsachse 6 ermöglichen. In gleicher Weise wie der elektrisch leitende Zylinder 4 ist auch der elektrisch leitende Zylinder 5 aufgebaut. Er besteht ebenfalls aus einem Innenring 11, einem Außenring 12 und zwischen beiden gelagerten Kugeln, Walzen oder Nadeln 13.The electrically conductive cylinder 4 is designed as a roller bearing, each with an inner ring 8 and an outer ring 9, and between the sleeve ring 8 and the outer ring 9 there are balls, rollers or needles 10 which prevent the inner ring 8 and the outer ring 9 from rotating relative to one another enable common longitudinal axis 6. The electrically conductive cylinder 5 is constructed in the same way as the electrically conductive cylinder 4. It also consists of an inner ring 11, an outer ring 12 and between the two balls, rollers or needles 13.
Die beiden in axialer Richtung hintereinander angeordneten Zylinder 4 und 5 werden von einem den Kollektor 1 konzentrisch umgebenden Gehäuse 14 gehalten. Das Gehäuse 14 besteht vorzugsweise aus einem elektrisch isolierenden Material. Die Außenringe 9 und 12 der beiden elektrisch leitenden Zylinder 4 und 5 sind feststehend im Gehäuse 14 fixiert. Die beiden elektrisch leitenden Zylinder 4 und 5 sind im Gehäuse 14 in radialer Richtung relativ zu ihren Längsachsen 5 und 6 federnd gelagert. Die federnde Lagerung der beiden Zylinder 4 und 5 kann beispielsweise mittels eines zwischen dem Außenring 9 bzw. 12 des Zylinders 5 bzw. 6 und der Innenwand des Gehäuses 14 eingefügten Gummiringes 15 bzw. 16 erfolgen. Die federnden Ringe 15 bzw. 16 können anstatt aus Gummi auch aus einem anderen elastischen Material bestehen. Vorzugsweise ist zwischen jedem Außenring 9 bzw. 12 des Zylinders 4 bzw. 5 und dem ihn umgebenden Gummiring 15 bzw. 16 noch ein Kontaktring 17 und 18 eingefügt, der aus einem elektrisch leitenden Material besteht.The two cylinders 4 and 5 arranged one behind the other in the axial direction are held by a housing 14 concentrically surrounding the collector 1. The housing 14 is preferably made of an electrically insulating material. The outer rings 9 and 12 of the two electrically conductive cylinders 4 and 5 are fixed in the housing 14. The two electrically conductive cylinders 4 and 5 are resiliently mounted in the housing 14 in the radial direction relative to their longitudinal axes 5 and 6. The resilient mounting of the two cylinders 4 and 5 can take place, for example, by means of a rubber ring 15 or 16 inserted between the outer ring 9 or 12 of the cylinder 5 or 6 and the inner wall of the housing 14. The resilient rings 15 and 16 can also consist of another elastic material instead of rubber. A contact ring 17 and 18, which consists of an electrically conductive material, is preferably inserted between each outer ring 9 or 12 of the cylinder 4 or 5 and the rubber ring 15 or 16 surrounding it.
Wie nachfolgend beschrieben, dienen die auf den Außenringen 9 und 12 der beiden Zylinder 4 und 5 aufliegenden Kontaktringe 17 und 18 dazu, Strom zu- bzw. abführende Kontaktstifte 19 und 20 mit den Zylindern 4 und 5 elektrisch zu verbinden. Der Kontaktstift 19 wird senkrecht zur Längsachse 6 des elektrisch leitenden Zylinders 4 von außen in das Gehäuse 4 hineingeschraubt. Sein aus dem Gehäuse 14 herausragendes Ende ist als Kontaktfahne 21 ausgebildet, so dass daran die Leitung einer Stromquelle angeschlossen werden kann. Das in das Innere des Gehäuses 14 weisende Ende des Kontaktstiftes 19 weist einen verjüngten Absatz 23 auf, der durch den Kontaktring 17 hindurch geführt ist und auf den Außenring 9 des Zylinders 4 stößt. Somit ist ein Stromfluss über den Kontaktstift 19, den Außenring 9, die Kugeln, Walzen oder NadelnAs described below, the contact rings 17 and 18 resting on the outer rings 9 and 12 of the two cylinders 4 and 5 serve to electrically connect current-carrying or discharging contact pins 19 and 20 to the cylinders 4 and 5. The Contact pin 19 is screwed into the housing 4 from the outside perpendicular to the longitudinal axis 6 of the electrically conductive cylinder 4. Its end protruding from the housing 14 is designed as a contact tab 21, so that the line of a power source can be connected to it. The end of the contact pin 19 pointing into the interior of the housing 14 has a tapered shoulder 23 which is guided through the contact ring 17 and abuts the outer ring 9 of the cylinder 4. Thus there is a current flow via the contact pin 19, the outer ring 9, the balls, rollers or needles
10 bis zum Innenring 8 des Zylinders 4 möglich. Der andere Kontaktstift 20 ist in gleicher Weise aufgebaut, wie der zuvor beschriebene Kontaktstift 19. Der Kontaktstift 20 weist an seinem aus dem Gehäuse 14 herausragenden Ende eine Kontaktfahne 22 auf und ist mit seinem in das Gehäuse hineinragenden Ende mit einem verjüngten Absatz 24 versehen, der durch den Kontaktring 18 hindurchgeführt ist und auf den Außenring 12 des Zylinders 5 stößt.10 to the inner ring 8 of the cylinder 4 possible. The other contact pin 20 is constructed in the same way as the previously described contact pin 19. The contact pin 20 has a contact tab 22 at its end protruding from the housing 14 and is provided with a tapered shoulder 24 with its end protruding into the housing is passed through the contact ring 18 and strikes the outer ring 12 of the cylinder 5.
Den beiden in den Figuren 2 und 3 dargestellten Frontansichten in Richtung A und in Richtung B des Kommutators ist zu entnehmen, dass die Durchmesser der Innenringe 8 und 11 der beiden Zylinder 4 und 5 in Relation zum Durchmesser des Kollektors 1 so zu wählen sind, dass der Innenring 8 bzw. 11 des Zylinders 4 bzw. 5 jeweils nur eine Lamelle des Kollektors 1 berührt. Und zwar berühren die Innenringe 8 und 11 der beiden Zylinder 4 und 5 jeweils diametral gegenüberliegende Lamellen des Kollektors 1. Über einen der beiden Zylinder 4 bzw. 5 wird einer Lamelle 3 des Kollektors 1 ein Strom zugeführt und über den anderen der beiden Zylinder 4 bzw. 5 wird aus einer anderen Lamelle des Kollektors 1 ein Strom abgeleitet. Mit den zuvor beschriebenen Kontaktstiften 19 und 20 können durch mehr oder weniger tiefes Einschrauben in das Gehäuse 14 die elektrisch leitenden Zylinder 4 und 5 gegen die von den Gummiringen 15 und 16 erzeugten Federkräfte auf die Lamellen 3 des Kollektors 1 gepresst werden. Wenn sich der mit dem Rotor des Motors verbundene Kollektor um seine Längsachse 2 dreht, rollen die Lamellen 3 über die Strom führenden Innenringe 8 und 11 der beiden exzentrisch angeordneten Zylinder 4 und 5 ab. Dadurch, dass sich die Innenringe 8 undIt can be seen from the two front views in direction A and direction B of the commutator shown in FIGS. 2 and 3 that the diameter of the inner rings 8 and 11 of the two cylinders 4 and 5 in relation to the diameter of the collector 1 should be selected such that the inner ring 8 or 11 of the cylinder 4 or 5 only touches one lamella of the collector 1. Namely, the inner rings 8 and 11 of the two cylinders 4 and 5 each touch diametrically opposite lamellae of the collector 1. A current is supplied to one lamella 3 of the collector 1 via one of the two cylinders 4 and 5 and is supplied via the other of the two cylinders 4 and 5 respectively 5 a current is derived from another lamella of the collector 1. With the previously described contact pins 19 and 20, the electrically conductive cylinders 4 and 5 can be pressed against the spring forces generated by the rubber rings 15 and 16 on the fins 3 of the collector 1 by screwing them more or less deeply into the housing 14. When the collector connected to the rotor of the motor rotates about its longitudinal axis 2, the fins 3 roll over the current-carrying inner rings 8 and 11 of the two eccentrically arranged cylinders 4 and 5. The fact that the inner rings 8 and
11 gegenüber den Außenringen 9 und 12 der beiden Zylinder 4 und 5 um die Längsachsen 6 und 7 verdrehen lassen, kommt es zu der besagten Abrollbewegung der Lamellen 3 des Kollektors 1 auf den Innenringen 8 und 11, wodurch eine gegenüber einem Schleifkontakt (wie bei einem Kohlebürstenkontakt) erheblich verschleißärmere Abrollkontaktierung gebildet wird. Während bei dem vorangehend beschriebenen Ausführungsbeispiel jeweils nur zwei Lamellen des Kollektors 1 durch die Zylinder 4 und 5 kontaktiert werden - die eine Lamelle für die Stromeinspeisung und die andere Lamelle für eine Stromableitung - können auch mehr als nur zwei hintereinander angeordnete elektrisch leitende Zylinder vorgesehen werden, wenn für die Stromzuführung und die Stromableitung mehrere Lamellen des Kollektors vorgesehen sind.11 against the outer rings 9 and 12 of the two cylinders 4 and 5 to rotate about the longitudinal axes 6 and 7, it comes to the said rolling movement of the fins 3 of the collector 1 on the inner rings 8 and 11, which one against a sliding contact (as in a Carbon brush contact) significantly less wear rolling contact is formed. While in the exemplary embodiment described above, only two lamellae of the collector 1 are contacted by the cylinders 4 and 5 - one lamella for the current feed and the other lamella for a current discharge - more than just two electrically conductive cylinders arranged one behind the other can also be provided, if several lamellae of the collector are provided for the current supply and the current dissipation.
Bei dem in den Figuren 1, 2 und 3 dargestellten Ausführungsbeispiel eines Kommutators rollt der Kollektor 1 an den Innenringen 8 und 11 der beiden Zylinder 4 und 5 ab, d.h. die beiden Zylinder "4 und 5 haben einen größeren Durchmesser als der Kollektor 1, so dass die beiden Zylinder 4 und 5 den Kollektor 1 umschließen. Wie der Figur 4 zu entnehmen ist, kann in einer Umkehrung zu dem vorhergehenden Beispiel der Kollektor 25 die elektrisch leitenden Zylinder 26 und 27 umschließen. In der Figur 4 ist eine Frontansicht eines Kollektors 25 mit zwei in seinem Inneren angeordneten elektrisch leitenden Zylindern 26 und 27 dargestellt, deren Längsachsen 28 und 29 parallel zur Längsachse 30 des Kollektors 25 und gegenüber dieser exzentrisch versetzt verlaufen. Der Übersichtlichkeit halber sind in der Figur 4 nicht das Gehäuse des Kommutators und auch nicht die Lagerungs- und Kontaktierungsmittel für die beiden elektrisch leitenden Zylinder 26 und 27 dargestellt. Genauso wie beim vorhergehenden Ausführungsbeispiel besteht der elektrisch leitende Zylinder 26 aus einem hmenring 31, einem Außenring 32 und dazwischen gelagerten Kugeln, Walzen oder Nadeln 33, und der elektrisch leitende Zylinder 27 besteht aus einem Innenring 34, einem Außenring 35 und dazwischen gelagerten Kugeln, Walzen oder Nadeln 36. Jeweils die hmenringe 31 und 34 der beiden elektrisch leitenden Zylinder 26 und 27 sind feststehend, und die Außenringe 32 und 35 sind gegenüber den Innenringen 31 und 34 um die Achsen 28 und 29 der elektrisch leitenden Zylinder 26 und 27 drehbar. Die Lamellen 37 des Kollektors 25 rollen bei diesem Ausführungsbeispiel des Kommutators über die Außenringe 32 und 35 der beiden elektrisch leitenden Zylinder 26 und 27 ab. Die Stromeinspeisung und -auskopplung in und aus den beiden elektrisch leitenden Zylindern 26 und 27 wird, was in der Figur 4 nicht dargestellt ist, wiederum mittels Kontaktstiften vorgenommen, welche mit den feststehenden Innenringen 31 und 34 der elektrisch leitenden Zylinder 26 und 27 in Verbindung gebracht werden.In the embodiment of a commutator shown in Figures 1, 2 and 3, the collector 1 rolls on the inner rings 8 and 11 of the two cylinders 4 and 5, ie the two cylinders " 4 and 5 have a larger diameter than the collector 1, so that the two cylinders 4 and 5 surround the collector 1. As can be seen in FIG. 4, in a reversal of the previous example, the collector 25 can enclose the electrically conductive cylinders 26 and 27. In Figure 4 is a front view of a collector 25 is shown with two electrically conductive cylinders 26 and 27 arranged in its interior, the longitudinal axes 28 and 29 of which run parallel to the longitudinal axis 30 of the collector 25 and are offset eccentrically with respect to this, for the sake of clarity, FIG Bearing and contacting means for the two electrically conductive cylinders 26 and 27. Shown as in the previous In the exemplary embodiment, the electrically conductive cylinder 26 consists of a sleeve ring 31, an outer ring 32 and balls, rollers or needles 33 mounted therebetween, and the electrically conductive cylinder 27 consists of an inner ring 34, an outer ring 35 and balls, rollers or needles 36 mounted therebetween The respective sleeve rings 31 and 34 of the two electrically conductive cylinders 26 and 27 are fixed, and the outer rings 32 and 35 are rotatable relative to the inner rings 31 and 34 about the axes 28 and 29 of the electrically conductive cylinders 26 and 27. In this exemplary embodiment of the commutator, the lamellae 37 of the collector 25 roll over the outer rings 32 and 35 of the two electrically conductive cylinders 26 and 27. The supply and extraction of current into and out of the two electrically conductive cylinders 26 and 27 is again carried out, which is not shown in FIG. 4, by means of contact pins which are connected to the fixed inner rings 31 and 34 of the electrically conductive cylinders 26 and 27 become.
Durch Wechsel der Stromflussrichtung in oder aus den beiden Zylindern 4 und 5 bzw. 26 und 27 kann zwischen einem Links- und Rechtslauf des Motors umgeschaltet werden. Des Weiteren lässt sich der Motor mit den elektrisch leitenden Zylindern 4, 5 bzw. 26, 27 auf sehr einfache Art und Weise abbremsen, in dem nämlich die über die Lamellen 3 bzw. 37 des Kollektors 1 bzw. 25 ablaufenden Außenringe 9, 12 bzw. Innenringe 31, 34 abgebremst oder in verschiedene Richtungen gedreht werden. By changing the direction of current flow in or out of the two cylinders 4 and 5 or 26 and 27, it is possible to switch between left and right rotation of the motor. Furthermore, the motor can be operated with the electrically conductive cylinders 4, 5 or 26, 27 brake in a very simple manner, namely by braking the outer rings 9, 12 or inner rings 31, 34 running over the fins 3 or 37 of the collector 1 or 25 or rotating them in different directions.

Claims

Ansprüche Expectations
1. Kommutator für Elektromotoren, der einen auf einer Motor-Ankerwelle angeordneten zylinderförmigen Kollektor (1, 25) und Kontaktierungsmittel (4, 5, 26, 27) aufweist, welche während einer Rotation des Kollektors (1, 25) mindestens jeweils zwei von mehreren am Kollektor (1, 25) vorhandenen Kontaktlamellen (3, 37) berühren und damit eine elektrische Verbindung zwischen den betreffenden Kontaktlamellen (3, 27) und externen Stromanschlüssen (21, 22) herstellen, dadurch gekennzeichnet, dass die Kontaktierungsmittel aus mindestens zwei in axialer Richtung des Kollektors (1, 25) hintereinander angeordneten, elektrisch leitenden Zylindern (4, 5, 26, 27) bestehen, deren Längsachsen (6, 7, 28, 29) parallel zur Längsachse (2, 30) des Kollektors (1, 25) liegen, und dass die . mindestens zwei Zylinder (4, 5, 26, 27) relativ zum Kollektor (1, 25) so platziert sind und einen solchen Durchmesser haben, dass der ^Kollektor (1, 25) bei seiner Rotation über die Innenflächen (8, 11) oder die Außenflächen (9, 12) der mindestens zwei Zylinder (4, 5, 26, 27) abrollt und dabei jeder der vorhandenen Zylinder (4, 5, 26, 27) immer nur von einer Lamelle (3, 37) des Kollektors (1, 25) berührt wird.1. Commutator for electric motors, which has a cylindrical collector (1, 25) arranged on a motor armature shaft and contacting means (4, 5, 26, 27), which during rotation of the collector (1, 25) each have at least two of several Touch existing contact blades (3, 37) on the collector (1, 25) and thus establish an electrical connection between the relevant contact blades (3, 27) and external power connections (21, 22), characterized in that the contacting means consist of at least two axially Direction of the collector (1, 25) arranged one behind the other, there are electrically conductive cylinders (4, 5, 26, 27) whose longitudinal axes (6, 7, 28, 29) are parallel to the longitudinal axis (2, 30) of the collector (1, 25 ) and that the. at least two cylinders (4, 5, 26, 27) are placed relative to the collector (1, 25) and have a diameter such that the ^ collector (1, 25) rotates over the inner surfaces (8, 11) or rolls the outer surfaces (9, 12) of the at least two cylinders (4, 5, 26, 27) and each of the existing cylinders (4, 5, 26, 27) only ever from one lamella (3, 37) of the collector (1 , 25) is touched.
2. Kommutator nach Anspruch 1, dadurch gekennzeichnet, dass die elektrisch leitenden Zylinder (4, 5, 26, 27) gegenüber der Längsachse (2, 30) des Kollektors (1, 25) exzentrisch gelagert sind.2. Commutator according to claim 1, characterized in that the electrically conductive cylinders (4, 5, 26, 27) with respect to the longitudinal axis (2, 30) of the collector (1, 25) are mounted eccentrically.
3. Kommutator nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die elektrisch leitenden Zylinder (4, 5) als Wälzlager mit jeweils einem hmenring (8, 11) und einem Außenring (9, 12) ausgebildet sind, dass die Zylinder (4, 5) den Kollektor (1) umschließen und dass die Innenringe (8, 11) der Zylinder (4, 5), über die der Kollektor (1) abrollt, drehbar gelagert sind und die Außenringe (9, 12) feststehen.3. Commutator according to one of claims 1 or 2, characterized in that the electrically conductive cylinders (4, 5) are designed as roller bearings, each with a sleeve ring (8, 11) and an outer ring (9, 12), that the cylinders ( 4, 5) enclose the collector (1) and that the inner rings (8, 11) of the cylinders (4, 5) over which the collector (1) rolls are rotatably mounted and the outer rings (9, 12) are fixed.
4. Kommutator nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die elektrisch leitenden Zylinder (26, 27) als Wälzlager mit jeweils einem Innenring (31, 34) und einem Außenring (32, 35) ausgebildet sind, dass die Zylinder (26, 27)4. Commutator according to one of claims 1 or 2, characterized in that the electrically conductive cylinders (26, 27) are designed as roller bearings, each with an inner ring (31, 34) and an outer ring (32, 35), that the cylinders ( 26, 27)
• im Inneren des Kollektors (25) angeordnet sind und dass die Außenringe (32, 35) der Zylinder (26, 27), über die der Kollektor (25) abrollt, drehbar gelagert sind und die Innenringe (31, 34) feststehen. • are arranged inside the collector (25) and that the outer rings (32, 35) of the cylinders (26, 27), via which the collector (25) rolls, are rotatably mounted and the inner rings (31, 34) are fixed.
5. Kommutator nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass Mittel (19, 20) vorgesehen sind, welche eine elektrische Verbindung zwischen den feststehenden Innenringen (8, 11) bzw. Außenringen (32, 35) der Zylinder (4, 5, 26, 27) und externen Stromanschlüssen (21, 22) herstellen.5. Commutator according to one of claims 3 or 4, characterized in that means (19, 20) are provided which provide an electrical connection between the fixed inner rings (8, 11) or outer rings (32, 35) of the cylinders (4, 5, 26, 27) and external power connections (21, 22).
6. Kommutator nach Anspruch 5, dadurch gekennzeichnet, dass die Mittel zur elektrischen Verbindung zwischen den feststehenden Außen- bzw. Innenringen (9, 12) der Zylinder (4, 5) und den externen Stromanschlüssen (21, 22) aus Stiften (19, 20) bestehen, die von außen durch ein oder mehrere die Außen- bzw. hmenringe (9, 12) fixierende Aufnahmen (14, 17, 18) schraubbar sind, so dass die Stiftenden (23, 24) auf die Außen- bzw. Innenringe (9, 12) stoßen.6. Commutator according to claim 5, characterized in that the means for electrical connection between the fixed outer and inner rings (9, 12) of the cylinders (4, 5) and the external power connections (21, 22) from pins (19, 20), which can be screwed from the outside through one or more receptacles (14, 17, 18) fixing the outer or sleeve rings (9, 12), so that the pin ends (23, 24) onto the outer or inner rings (9, 12) encounter.
7. Kommutator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die elektrisch leitenden Zylinder (4, 5) in radialer Richtung relativ zu ihrer Längsachse (6, 7) federnd gelagert sind.7. Commutator according to one of the preceding claims, characterized in that the electrically conductive cylinders (4, 5) are resiliently mounted in the radial direction relative to their longitudinal axis (6, 7).
8. Kommutator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Mittel (19, 20) vorgesehen sind, welche die elektrisch leitenden Zylinder (4, 5) gegen den Kollektor (1) drücken.8. Commutator according to one of the preceding claims, characterized in that means (19, 20) are provided which press the electrically conductive cylinders (4, 5) against the collector (1).
9. Kommutator nach Anspruch 6 und Anspruch 8, dadurch gekennzeichnet, dass die auf die Außen- bzw. Innenringe (9, 12) der elektrisch leitenden Zylinder (4, 5) stoßenden, einen elektrischen Kontakt herstellenden Stifte (19, 20) die Zylinder (4, 5) gegen den Kollektor (1) drücken. 9. commutator according to claim 6 and claim 8, characterized in that on the outer and inner rings (9, 12) of the electrically conductive cylinders (4, 5) abutting, making electrical contact pins (19, 20) the cylinder Press (4, 5) against the collector (1).
EP03717114A 2002-05-25 2003-02-27 Commutator for electric motors Withdrawn EP1512200A1 (en)

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DE10223361 2002-05-25
DE10223361A DE10223361C1 (en) 2002-05-25 2002-05-25 Commutator for electric motors
PCT/DE2003/000625 WO2003100919A1 (en) 2002-05-25 2003-02-27 Commutator for electric motors

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Title
See references of WO03100919A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011073120A1 (en) 2009-12-17 2011-06-23 Basf Se Metal oxide support material containing nanoscaled iron-platinum group metal particles

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US6903481B2 (en) 2005-06-07
WO2003100919A1 (en) 2003-12-04
US20040239205A1 (en) 2004-12-02
CN1537348A (en) 2004-10-13
DE10223361C1 (en) 2003-12-24
CN100342598C (en) 2007-10-10
JP2005528072A (en) 2005-09-15

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