EP0089625A1 - Device for transmitting electric currents between mutually rotatable parts - Google Patents

Device for transmitting electric currents between mutually rotatable parts Download PDF

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Publication number
EP0089625A1
EP0089625A1 EP83102635A EP83102635A EP0089625A1 EP 0089625 A1 EP0089625 A1 EP 0089625A1 EP 83102635 A EP83102635 A EP 83102635A EP 83102635 A EP83102635 A EP 83102635A EP 0089625 A1 EP0089625 A1 EP 0089625A1
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EP
European Patent Office
Prior art keywords
housing
axial
bearings
bearing
shaft
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Granted
Application number
EP83102635A
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German (de)
French (fr)
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EP0089625B1 (en
Inventor
Klaus Ing.-Grad. Barthelt
Kurt Dollhofer
Ludwig Rauh
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Schleifring und Apparatebau GmbH
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Schleifring und Apparatebau GmbH
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Priority to AT83102635T priority Critical patent/ATE17417T1/en
Publication of EP0089625A1 publication Critical patent/EP0089625A1/en
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Publication of EP0089625B1 publication Critical patent/EP0089625B1/en
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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
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing

Definitions

  • slip ring transmitters are mostly used for this, i.e. Devices in which brushes, in particular carbon brushes, slide on annular slideways made of highly conductive material. These slip ring transmitters have the disadvantage that high wear occurs on the brushes, which are made of soft material. In order to achieve low wear and thus a long service life even at high speeds, attempts have already been made to use ball bearings for power transmission. It was found, however, that the internal clearance leads to brief interruptions, so that there is a high level of noise in the case of measuring currents and an annoying spark formation which increases wear and tear.
  • the object of the invention is to design a ball bearing in such a way that the noise in the case of measurement currents and the spark formation in the case of stronger currents is avoided. While the disturbing internal clearance is inevitable in radial bearings, it has been found that a play-free and trouble-free run can be achieved if the ball bearings that transmit the current are axial bearings. In particular, there is a trouble-free current transmission if these axial bearings that transmit the current are under a constant, adjustable pressure, in particular under spring pressure. This pressure can be set depending on the dimensions of the bearings and the intended maximum speed and provides the necessary Contact pressure.
  • a good, uniform contact is achieved if, according to the further invention, the races do not have the round recess that is usual in ball bearings, but a V-shaped recess.
  • This form of the recess has the advantage that each ball rests at two defined points in the ring, thereby ensuring improved contact transmission.
  • Another way of achieving good electrical conductivity combined with a relatively high surface hardness is that the bearing shells and the balls are coated with material consisting of nitrites or containing nitrites. This results in a ver Improved contacting, especially with increasing speed due to centrifugal forces acting on the ball.
  • the device according to the invention has a plurality of current-transmitting axial bearings which are arranged in the axial direction one above the other in a housing and coaxially to a shaft which can be rotated relative to the housing, insulating rings being inserted between the facing bearing shells of two adjacent axial bearings in such a way that an insulating ring which is connected to the shaft in a rotationally fixed manner follows alternately on an insulating ring which is connected to the housing in a rotationally fixed manner.
  • the insulating rings are inserted into the housing such that they can be displaced in the axial direction and the contact pressure is brought about by a spring element which is arranged at one end of the housing and which is effective for all axial bearings.
  • a spring element which is arranged at one end of the housing and which is effective for all axial bearings.
  • the shaft 10 is rotatably mounted in a housing 12 by means of the radial ball bearings 19, 20.
  • the ball bearings 19, 20 can be any known ball bearings that absorb all the forces that occur between the housing 12 and the shaft 10.
  • a second housing 15 is inserted into the housing 12 and fastened by means of a flange.
  • the insulating rings 3 are used, which support the bearing shells 1b of axial bearings. Insulating rings 2 are also pushed onto the shaft 10 and carry the other bearing shells 1 a of the axial bearings.
  • the insulating rings 3 are connected in a rotationally fixed manner to the housing 15 and the insulating rings 2 are connected in a rotationally fixed manner to the shaft 10.
  • FIG. 2 A part of the axial bearings is shown in FIG. 2, it being evident that the bearing shells 1a and 1b have V-shaped recesses 24.
  • the bearing shells 1 b connected to the housing 15 are connected to the electrical feed lines 8 and the bearing shells 1 a connected to the shaft 10 are connected to the feed lines 9.
  • the insulating rings 3 and 2 are inserted alternately in the housing 15. This structure makes it possible to provide an almost unlimited number of transmission paths by lining up a large number of axial bearings.
  • ball holders 27 can be provided in a manner known per se, which, however, in contrast to the usual ball holders, are not made of metal but of plastic. With these ball holders, the balls 25 can be kept at a distance without wear. This makes it possible to accommodate several balls, whereby the current to be transmitted can be increased with a small size. Due to the difference in the circumferential speeds of the inner and outer raceway at the V-shaped recesses, there is a 6 self-cleaning of the contact surfaces between balls and bearing shells, while contaminations that would impair contact occur in the valley bottom of the V-shaped recesses, which does not serve as a contact surface can deposit.

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  • Support Of The Bearing (AREA)
  • Rolling Contact Bearings (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

1. Device for transmitting electric currents between mutually rotatable parts, comprising a plurality of current-transmitting axial ball bearings (1a-1b) arranged in axial direction one above the other in a housing (15) coaxial with a component (10) which ist rotatable relatively to said housing (15), whereby axially displaceable insulating rings (2, 3) are each arranged between the opposing bearing bushes (1a-1a, 1b-1b) of two adjacent ball bearings, said bearing bushes being connected to electric supply lines, and whereby the contact pressure is effected by a spring element (22) which is common to all axial ball bearings and is arranged at one end of the housing (15), the bearing bushes (1a, 1b) and the balls (25) being made of electrically conductive material, characterized in that the component which is rotatable relatively to the housing (15), is formed as a shaft (10) received in said housing (15), said shaft being rotatably mounted in the housing (15) through radial bearings (19, 20) receiving all of the forces which occur between the housing and the shaft, that the insulating rings (3, 2) are arranged in such a way that, alternately, an insulating ring (3) which is inserted in the housing (15) and is positively connected therewith, is followed by an insulating ring (2) which is slipped onto the shaft (10) and is positively connected therewith, that the bearing bushes (1a, 1b) which are provided with V- shaped recesses (24), are made of a silver alloy and are coated with a material consisting of or containing nitrides, and that the bearing pressure of the axial ball bearings (1a, 1b) is adjustable.

Description

Bei Maschinen verschiedenster Art müssen oftmals elektrische Ströme zwischen gegeneinander verdrehbaren Teilen übertragen werden. Meist werden dazu Schleifringübertrager verwendet, d.h. Vorrichtungen,bei denen auf ringförmigen Schleifbahnen aus gut leitendem Material Bürsten, insbesondere Kohlebürsten, gleiten. Diese Schleifringübertrager haben den Nachteil, daß an den Bürsten, die aus weichem Material bestehen, ein hoher Verschleiß auftritt. Um auch bei hoher Drehzahl geringen Verschleiß und damit eine lange Lebensdauer zu erreichen, wurde bereits versucht, zur Stromübertragung Kugellager zu verwenden. Dabei ergab sich jedoch, daß die Lagerluft kurzzeitige Unterbrechungen zur Folge hat, so daß bei Meßströmen ein hohes Rauschen und bei stärkeren Strömen eine störende und den Verschleiß erhöhende Funkenbildung entsteht.In machines of various types, electrical currents often have to be transmitted between parts that can be rotated relative to one another. Slip ring transmitters are mostly used for this, i.e. Devices in which brushes, in particular carbon brushes, slide on annular slideways made of highly conductive material. These slip ring transmitters have the disadvantage that high wear occurs on the brushes, which are made of soft material. In order to achieve low wear and thus a long service life even at high speeds, attempts have already been made to use ball bearings for power transmission. It was found, however, that the internal clearance leads to brief interruptions, so that there is a high level of noise in the case of measuring currents and an annoying spark formation which increases wear and tear.

Durch die Erfindung wird die Aufgabe gelöst, ein Kugellager so zu gestalten, daß das Rauschen bei Meßströmen und die Funkenbildung bei stärkeren Strömen vermieden wird. Während bei Radiallagern die störende Lagerluft unvermeidlich ist, ergab sich, daß sich ein spiel- und störungsfreier Lauf erreichen läßt, wenn die den Strom übertragenden Kugellager Axiallager sind. Insbesondere ergibt sich eine störungsfreie Stromübertragung, wenn diese,den Strom übertragenden Axiallager unter einem konstanten einstellbaren Druck stehen, insbesondere unter Federdruck. Dieser Druck kann abhängig von den Abmessungen der Lager und der vorgesehenen maximalen Drehzahl eingestellt werden und sorgt für den nötigen Kontaktdruck. Ein guter gleichmäßiger Kontakt wird erzielt, wenn gemäß der weiteren Erfindung die Laufringe nicht den bei Kugellagern üblichen runden Einstich aufweisen, sondern einen V-förmigen Einstich. Diese Form des Einstiches hat den Vorteil, daß jede Kugel an zwei definierten Punkten im Ring aufliegt und dadurch eine verbesserte Kontaktübertragung gewährleistet ist.The object of the invention is to design a ball bearing in such a way that the noise in the case of measurement currents and the spark formation in the case of stronger currents is avoided. While the disturbing internal clearance is inevitable in radial bearings, it has been found that a play-free and trouble-free run can be achieved if the ball bearings that transmit the current are axial bearings. In particular, there is a trouble-free current transmission if these axial bearings that transmit the current are under a constant, adjustable pressure, in particular under spring pressure. This pressure can be set depending on the dimensions of the bearings and the intended maximum speed and provides the necessary Contact pressure. A good, uniform contact is achieved if, according to the further invention, the races do not have the round recess that is usual in ball bearings, but a V-shaped recess. This form of the recess has the advantage that each ball rests at two defined points in the ring, thereby ensuring improved contact transmission.

Zur Verbesserung der elektrischen Werte der Vorrichtung erwies es sich ferner als zweckmäßig, statt der bei Kuggellagern üblichen Stahlteile Teile aus Nichteisen-Metallen zu verwenden. Bei der Auswahl des geeigneten Materials sind drei Materialeigenschaften wichtig, nämlich Elastizitätsmodul, Oberflächenhärte und Leitfähigkeit. Werkstoffe mit hoher Leitfähigkeit, also geringem spezifischen Widerstand, sind in der Regel weich und plastisch verformbar, während umgekehrt Werkstoffe mit hohem Elastizitätsmodul und großer Härte meist einen hohen spezifischen Widerstand besitzen. Es mußte also nach einem Kompromiß gesucht werden und es ergab sich, daß Silberlegierungen besonders geeignet sind, da sie mit einer relativ hohen Leitfähigkeit, ein großes Elastizitätsmodul und verhältnismäßig große Oberflächenhärte verbinden. Insbesondere geeignet sind Legierungen des Silbers mit Kupfer oder Beryllium oder mit beiden Metallen. Als vorteilhaft hat sich z.B. eine Materialpaarung von kalt verfestigtem 835-Silber mit Silberkugeln, die mit 3% Kupfer gehärtet sind, erwiesen.In order to improve the electrical values of the device, it also proved expedient to use parts made of non-ferrous metals instead of the steel parts customary for ball bearings. When choosing the right material, three material properties are important, namely modulus of elasticity, surface hardness and conductivity. Materials with high conductivity, i.e. low specific resistance, are generally soft and plastically deformable, while materials with a high modulus of elasticity and high hardness, on the other hand, usually have a high specific resistance. A compromise therefore had to be sought and it turned out that silver alloys are particularly suitable because they combine a relatively high conductivity, a large modulus of elasticity and a relatively high surface hardness. Alloys of silver with copper or beryllium or with both metals are particularly suitable. For example, a material combination of cold-hardened 835 silver with silver balls hardened with 3% copper has been proven.

Eine weitere Möglichkeit, eine gute elektrische Leitfähigkeit, verbunden mit verhältnismäßig großer Oberflächenhärte, zu erzielen, besteht darin, daß die Lagerschalen und die Kugeln mit aus Nitriten bestehendem oder Nitrite enthaltendem Material beschichtet sind. Hierdurch ergibt sich eine Verbesserung der Kontaktierung, insbesondere bei steigender Drehzahl durch Fliehkräfte, welche auf die Kugel wirken.Another way of achieving good electrical conductivity combined with a relatively high surface hardness is that the bearing shells and the balls are coated with material consisting of nitrites or containing nitrites. This results in a ver Improved contacting, especially with increasing speed due to centrifugal forces acting on the ball.

Bei einer besonders vorteilhaften Ausführungsform weist die erfindungsgemäße Vorrichtung mehrere stromübertragende Axiallager auf, die in axialer Richtung übereinander in einem Gehäuse und koaxial zu einer gegenüber dem Gehäuse verdrehbaren Welle angeordnet sind, wobei jeweils zwischen den einander zugewandten Lagerschalen zweier benachbarter Axiallager Isolierringe eingesetzt sind, und zwar derart, daß abwechselnd jeweils auf ein mit dem Gehäuse drehfest verbundenen Isolierring ein mit der Welle drehfest verbundener Isolierring folgt. Hierbei ist es zweckmäßig, wenn die Isolierringe in axialer Richtung verschiebbar in das Gehäuse eingesetzt sind und der Kontaktdruck durch ein an einem Ende des Gehäuses angeordnetes für alle Axiallager gemeinsam wirksames Federelement bewirkt wird. Bei dieser Ausführungsform sind infolge der besonderen Anordnung der Isolierringe jeweils zwei rotierende Lagerschalen und zwei feststehende Lagerschalen über einen Isolierring mechanisch miteinander verbunden. Diese Anordnung erlaubt das Anbringen nahezu unbegrenzt vieler Übertragungswege. Durch das in axialer-Richtung verschiebbare Einsetzen der Isolierringe in das Gehäuse wird ein quasi fliegender Aufbau erreicht, was zur Folge hat, daß in axialer und radialer Richtung wirksame Fertigungs- und Montagetoleranzen vernachlässigbar sind. Weiterhin wird bei diesem Aufbau nur ein einziges Federelement benötigt, das einstellbar den Kontaktdruck für alle Axiallager erzeugt. Die exakte Einstellmöglichkeit des Kontaktdruckes ermöglicht einen Eingriff auf die Lebensdauer der rotierenden Teile. Diese Art des Aufbaus benötigt auch keine festen Flansche, sondern nur eine stützende Kante und, da in tangentialer Richtung nur geringe Kräfte auftreten, nur einfache Mitnehmer.In a particularly advantageous embodiment, the device according to the invention has a plurality of current-transmitting axial bearings which are arranged in the axial direction one above the other in a housing and coaxially to a shaft which can be rotated relative to the housing, insulating rings being inserted between the facing bearing shells of two adjacent axial bearings in such a way that an insulating ring which is connected to the shaft in a rotationally fixed manner follows alternately on an insulating ring which is connected to the housing in a rotationally fixed manner. In this case, it is expedient if the insulating rings are inserted into the housing such that they can be displaced in the axial direction and the contact pressure is brought about by a spring element which is arranged at one end of the housing and which is effective for all axial bearings. In this embodiment, as a result of the special arrangement of the insulating rings, two rotating bearing shells and two fixed bearing shells are mechanically connected to one another via an insulating ring. This arrangement allows almost unlimited transmission paths to be attached. By inserting the insulating rings in the housing, which is displaceable in the axial direction, a quasi flying construction is achieved, with the result that effective manufacturing and assembly tolerances in the axial and radial directions are negligible. Furthermore, only a single spring element is required in this construction, which generates adjustable contact pressure for all axial bearings. The exact setting of the contact pressure enables an intervention in the service life of the rotating parts. This type of construction also needs no fixed flanges, only a supporting edge and, since only small forces occur in the tangential direction, only simple drivers.

Es hat sich weiterhin als vorteilhaft erwiesen, wenn in jedem Axiallager ein aus Kunststoffmaaterial bestehender Kugelhalter zur Halterung mehrerer Kugeln in festgelegten Abständen angeordnet ist. Auf diese Weise ist es möglich, in jedem Axiallager mehrere Kugeln unterzubringen, die verschleißfrei auf Abstand gehalten werden, wodurch der zu übertragende Strom bei geringer Baugröße erhöht werden kann.It has also proven to be advantageous if a ball holder made of plastic material is arranged in each axial bearing for holding a plurality of balls at fixed intervals. In this way, it is possible to accommodate several balls in each thrust bearing, which are kept free of wear and tear, whereby the current to be transmitted can be increased with a small size.

Ein Ausführungsbeispiel einer Stromübertragungsvorrichtung nach der Erfindung ist in den Zeichnungen dargestellt.An embodiment of a power transmission device according to the invention is shown in the drawings.

  • Fig. 1 zeigt einen Längsschnitt durch die Vorrichtung ,1 shows a longitudinal section through the device,
  • Fig. 2 zeigt im vergrößertem Maßstäb die Axiallager.Fig. 2 shows the axial bearings on an enlarged scale.

In einem Gehäuse 12 ist die Welle 10 mittels der RadialKugellager 19, 20 drehbar gelagert. Die Kugellager 19, 20 können beliebige bekannte Kugellager sein, die alle zwischen dem Gehäuse 12 und der Welle 10 auftretenden Kräfte aufnehmen. In das Gehäuse 12 ist ein zweites Gehäuse 15 eingesetzt und mittels eines Flansches befestigt. In dieses Gehäuse sind die Isolierringe 3 eingesetzt, die die Lagerschalen lb von Axiallagern tragen. Auf die Welle 10 sind ebenfalls Isolierringe 2 aufgeschoben, die die anderen Lagerschalen la der Axiallager tragen. Durch diese Anordnung sind die Isolierringe 3 drehfest mit dem Gehäuse 15 und die Isolierringe 2 drehfest mit der Welle 10 verbunden. Zwischen diesen Lagerschalen la, lb befinden sich die Kugellager-Kugeln 25. In Fig. 2 ist ein Teil der Axiallager dargestellt, wobei ersichtlich ist, daß die Lagerschalen la und lb V-förmige Einstiche 24 aufweisen. Die mit dem Gehäuse 15 verbundenen Lagerschalen Ib sind mit den elektrischen Zuleitungen 8 und die mit der Welle 10 verbundenen Lagerschalen la mit den Zuleitungen 9 verbunden. Werden, wie in Fig. 1 dargestellt, sechs Axiallager verwendet, die voneinander durch die Isolierringe 2, 3 getrennt sind, so können sechs Ströme unabhängig voneinander übertragen werden. Wie aus Fig. 1 ersichtlich, sind die Isolierringe 3 und 2 abwechselnd in das Gehäuse 15 eingesetzt. Dieser Aufbau erlaubt es, durch Aneinanderreihen einer großen Anzahl von Axiallagern eine beinahe unbegrenzte Anzahl von Übertragungswegen vorzusehen. Wichtig für eine gute Übertragung, d.h. für gleichmäßige Kontakte, die bei Meßströmen kein Rauschen und bei starken Strömen keine Funkenbildung verursachen, ist ein gleichmäßiger Lagerdruck, der nicht zu gering sein-darf, damit guter Kontakt gewährleistet ist, aber auch nicht zu hoch sein darf, damit die Lagerschalen und Kugeln nicht deformiert oder abgenutzt werden, wodurch die Kontaktgabe wieder mit der Zeit verschlechtert würde. Dieser gleichmäßige Lagerdruck wird dadurch gewährleistet. daß an einem Ende Tellerfedern 22 vorgesehen sind, deren Druck durch die Scheibe 6 auf die zusammen mit den Isolierringen 2, 3 in axialer Richtung verschiebbaren Axiallager übertragen wird, auf die aber sonst keine Kräfte einwirken. Durch die Isolierringe 2, 3 und durch zusätzliche Isolierscheiben 4 sind die Axiallager gegen die übrigen Metallteile der Vorrichtung elektrisch isoliert. Eine Mutter 26 dient zur Einstellung des Druckes, den die Federn 22 auf die Axiallager ausüben.The shaft 10 is rotatably mounted in a housing 12 by means of the radial ball bearings 19, 20. The ball bearings 19, 20 can be any known ball bearings that absorb all the forces that occur between the housing 12 and the shaft 10. A second housing 15 is inserted into the housing 12 and fastened by means of a flange. In this housing, the insulating rings 3 are used, which support the bearing shells 1b of axial bearings. Insulating rings 2 are also pushed onto the shaft 10 and carry the other bearing shells 1 a of the axial bearings. As a result of this arrangement, the insulating rings 3 are connected in a rotationally fixed manner to the housing 15 and the insulating rings 2 are connected in a rotationally fixed manner to the shaft 10. Between these bearing shells la, lb are the ball bearing Balls 25. A part of the axial bearings is shown in FIG. 2, it being evident that the bearing shells 1a and 1b have V-shaped recesses 24. The bearing shells 1 b connected to the housing 15 are connected to the electrical feed lines 8 and the bearing shells 1 a connected to the shaft 10 are connected to the feed lines 9. If, as shown in FIG. 1, six axial bearings are used which are separated from one another by the insulating rings 2, 3, six currents can be transmitted independently of one another. 1, the insulating rings 3 and 2 are inserted alternately in the housing 15. This structure makes it possible to provide an almost unlimited number of transmission paths by lining up a large number of axial bearings. It is important for a good transmission, that is, for even contacts that do not cause noise in the case of measuring currents and no sparking in the case of strong currents, that the bearing pressure is even, which must not be too low, so that good contact is guaranteed, but also not too high , so that the bearing shells and balls are not deformed or worn, which would make contact deteriorating again over time. This ensures this even bearing pressure. that plate springs 22 are provided at one end, the pressure of which is transmitted through the disk 6 to the axial bearings which can be displaced in the axial direction together with the insulating rings 2, 3, but on which no other forces act. The axial bearings are electrically insulated from the other metal parts of the device by the insulating rings 2, 3 and by additional insulating washers 4. A nut 26 is used to adjust the pressure that the springs 22 exert on the thrust bearings.

Zur Erleichterung des Zusammenbaues und zur Gewährleistung eines ruhigen Laufes können in an sich bekannter Weise Kugelhalter 27 vorgesehen sein, die jedoch zum Unterschied von den üblichen Kugelhaltern nicht aus Metall, sondern aus Kunststoff bestehen. Durch diese Kugelhalter können die Kugeln 25 verschleißfrei auf Abstand gehalten werden. Es ist dadurch möglich, mehrere Kugeln unterzubringen, wodurch der zu übertragende Strom bei geringer Baugröße erhöht wwerden kann. Durch die Differenz der Umfangsgeschwindigkeiten von innerer und äußerer Laufspur an den V-förmigen Einstichen tritt eine 6 Selbstreinigung der Berührungsflächen zwischen Kugeln und Lagerschalen auf, während sich Verunreinigungen, die die Kontaktgabe beeinträchtigen würden, in der nicht als Kontaktfläche dienenden Talsole der V-förmigen Einstiche ablagern können.To facilitate assembly and to ensure smooth running, ball holders 27 can be provided in a manner known per se, which, however, in contrast to the usual ball holders, are not made of metal but of plastic. With these ball holders, the balls 25 can be kept at a distance without wear. This makes it possible to accommodate several balls, whereby the current to be transmitted can be increased with a small size. Due to the difference in the circumferential speeds of the inner and outer raceway at the V-shaped recesses, there is a 6 self-cleaning of the contact surfaces between balls and bearing shells, while contaminations that would impair contact occur in the valley bottom of the V-shaped recesses, which does not serve as a contact surface can deposit.

Claims (10)

1. Vorrichtung zur Übertragung elektrischer Ströme zwischen gegeneinander verdrehbaren Teilen mit Kugellagern, dadurch gekennzeichnet, daß die den Strom übertragenden Kugellager Axiallager (la,lb, 25) sind.1. Device for transmitting electrical currents between mutually rotatable parts with ball bearings, characterized in that the current-transmitting ball bearings are axial bearings (la, lb, 25). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Axiallager unter einem konstanten einstellbaren Druck stehen.2. Device according to claim 1, characterized in that the axial bearings are under a constant adjustable pressure. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Lagerdruck durch Federn (22) erzeugt wird.3. Apparatus according to claim 2, characterized in that the bearing pressure is generated by springs (22). 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Lagerschalen (la, lb) der Axiallager einen V-förmigen Einstich (24) aufweisen.4. Device according to one of claims 1 to 3, characterized in that the bearing shells (la, lb) of the axial bearing have a V-shaped recess (24). 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Lagerschalen (la, lb) und die Kugeln (25) aus Silberlegierungen bestehen.5. Device according to one of claims 1 to 4, characterized in that the bearing shells (la, lb) and the balls (25) consist of silver alloys. 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Lagerschalen (la, lb) und die Kugeln (25) aus Legierungen des Silbers mit Kupfer und/oder Beryllium bestehen.6. The device according to claim 5, characterized in that the bearing shells (la, lb) and the balls (25) consist of alloys of silver with copper and / or beryllium. 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Lagerschalen (la, lb) und die Kugeln (25) mit aus Nitriten bestehendem oder Nitrite enhaltendem Material beschichtet sind.7. Device according to one of claims 1 to 6, characterized in that the bearing shells (la, lb) and the balls (25) are coated with material consisting of nitrites or containing nitrites. 8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie mehrere stromübertragende Axiallager aufweist, die in axialer Richtung übereinander in einem Gehäuse (15) und koaxial zu einer gegenüber dem Gehäuse (15) verdrehbaren Welle (10) angeordnet sind, wobei jeweils zwischen den einander zugewandten Lagerschalen (la-la, lb-lb) zweier benachbarter Axiallager Isolierringe (3,2) eingesetzt sind, und zwar derart, daß abwechselnd jeweils auf einen mit dem Gehäuse (15) drehfest verbundenen Isolierring (3) ein mit der Welle (10) drehfest verbundener Isolierring (2) folgt.8. Device according to one of claims 1 to 7, characterized in that it has a plurality of current-transmitting axial bearings which are arranged one above the other in the axial direction in a housing (15) and coaxially to a shaft (10) rotatable relative to the housing (15), in each case between the mutually facing bearing shells (la-la, lb-lb) of two adjacent axial bearings, insulating rings (3, 2) are inserted, in such a way that an alternating insulating ring (3) is connected to the housing (15) in a rotationally fixed manner with the shaft (10) non-rotatably connected insulating ring (2) follows. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Isolierringe (2, 3) in axialer Richtung verschiebbar in das Gehäuse (10) eingesetzt sind und der Kontaktdruck durch ein an einem Ende des Gehäuses (10) angeordnetes für alle Axiallager gemeinssam wirksames Federelement (22) bewirkt wird.9. The device according to claim 8, characterized in that the insulating rings (2, 3) are slidably inserted in the axial direction in the housing (10) and the contact pressure by a spring element arranged at one end of the housing (10) for all axial bearings (22) is effected. 10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß in jedem Axiallager ein aus Kunststoffmaterial bestehender Kugelhalter (27) zur Halterung mehrerer Kugeln (25) in festgelegten Abständen angeordnet ist.10. Device according to one of claims 1 to 9, characterized in that a ball holder (27) made of plastic material for holding a plurality of balls (25) is arranged at fixed intervals in each axial bearing.
EP83102635A 1982-03-20 1983-03-17 Device for transmitting electric currents between mutually rotatable parts Expired EP0089625B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102635T ATE17417T1 (en) 1982-03-20 1983-03-17 DEVICE FOR THE TRANSMISSION OF ELECTRIC CURRENT BETWEEN COUNTER-ROTATING PARTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823210334 DE3210334A1 (en) 1982-03-20 1982-03-20 DEVICE FOR TRANSMITTING ELECTRICAL CURRENTS BETWEEN PARTS REVERSIBLE
DE3210334 1982-03-20

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EP0089625A1 true EP0089625A1 (en) 1983-09-28
EP0089625B1 EP0089625B1 (en) 1986-01-08

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EP83102635A Expired EP0089625B1 (en) 1982-03-20 1983-03-17 Device for transmitting electric currents between mutually rotatable parts

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EP (1) EP0089625B1 (en)
AT (1) ATE17417T1 (en)
DE (2) DE3210334A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1358973A1 (en) * 2001-01-31 2003-11-05 BL Autotec, Ltd. Rotary joint
US7854615B1 (en) 2010-04-30 2010-12-21 Lincoln Global, Inc. Rotational connector for welding torch
CN104317014A (en) * 2014-08-29 2015-01-28 中航光电科技股份有限公司 Photoelectric composite rotary connector
WO2016083768A1 (en) * 2014-11-29 2016-06-02 Orange Music Electronic Company Limited Apparatus for providing a rotatable coupling between audio cables
CN111162422A (en) * 2020-03-11 2020-05-15 北京理工大学 Axial surface contact slip ring of flexible contact electrode
CN111313199A (en) * 2020-03-11 2020-06-19 北京理工大学 Flexible rolling body radial surface contact slip ring
CN111370958A (en) * 2020-03-11 2020-07-03 北京理工大学 Flexible rolling body axial surface contact slip ring

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US1821132A (en) * 1927-10-31 1931-09-01 Baker Charles Goater Swivel connection for electric cables and the like
US2523081A (en) * 1947-08-15 1950-09-19 Gen Electric Gyroscope electrical connection apparatus
DE1152459B (en) * 1954-09-27 1963-08-08 Karl Mohr Line coupling with concentric and relatively rotatable components for multi-phase power
FR2166986A5 (en) * 1971-11-26 1973-08-17 Toorn Cornelis Van

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Publication number Priority date Publication date Assignee Title
US3940200A (en) * 1975-03-04 1976-02-24 Schreffler Robert Z Electrical conductor arrangement including flexible race construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1821132A (en) * 1927-10-31 1931-09-01 Baker Charles Goater Swivel connection for electric cables and the like
US2523081A (en) * 1947-08-15 1950-09-19 Gen Electric Gyroscope electrical connection apparatus
DE1152459B (en) * 1954-09-27 1963-08-08 Karl Mohr Line coupling with concentric and relatively rotatable components for multi-phase power
FR2166986A5 (en) * 1971-11-26 1973-08-17 Toorn Cornelis Van

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1358973A1 (en) * 2001-01-31 2003-11-05 BL Autotec, Ltd. Rotary joint
EP1358973A4 (en) * 2001-01-31 2006-05-31 Bl Autotec Ltd Rotary joint
US7854615B1 (en) 2010-04-30 2010-12-21 Lincoln Global, Inc. Rotational connector for welding torch
CN104317014A (en) * 2014-08-29 2015-01-28 中航光电科技股份有限公司 Photoelectric composite rotary connector
WO2016083768A1 (en) * 2014-11-29 2016-06-02 Orange Music Electronic Company Limited Apparatus for providing a rotatable coupling between audio cables
CN107431320A (en) * 2014-11-29 2017-12-01 橙色音乐电子有限公司 For setting the device of rotary connector between tone frequency channel wire
US10038291B2 (en) 2014-11-29 2018-07-31 Orange Music Electronic Company Limited Apparatus for providing a rotatable coupling between audio cables
CN111162422A (en) * 2020-03-11 2020-05-15 北京理工大学 Axial surface contact slip ring of flexible contact electrode
CN111313199A (en) * 2020-03-11 2020-06-19 北京理工大学 Flexible rolling body radial surface contact slip ring
CN111370958A (en) * 2020-03-11 2020-07-03 北京理工大学 Flexible rolling body axial surface contact slip ring
CN111162422B (en) * 2020-03-11 2020-12-11 北京理工大学 Axial surface contact slip ring of flexible contact electrode

Also Published As

Publication number Publication date
DE3210334A1 (en) 1983-09-29
EP0089625B1 (en) 1986-01-08
DE3361753D1 (en) 1986-02-20
ATE17417T1 (en) 1986-01-15

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