EP0768738A1 - Rotary member for coaxial connections - Google Patents

Rotary member for coaxial connections Download PDF

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Publication number
EP0768738A1
EP0768738A1 EP96116034A EP96116034A EP0768738A1 EP 0768738 A1 EP0768738 A1 EP 0768738A1 EP 96116034 A EP96116034 A EP 96116034A EP 96116034 A EP96116034 A EP 96116034A EP 0768738 A1 EP0768738 A1 EP 0768738A1
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EP
European Patent Office
Prior art keywords
elements
tubular
rotary element
element according
end regions
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EP96116034A
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German (de)
French (fr)
Inventor
Henner Aulebach
Claus Kruse
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency

Definitions

  • the invention relates to a rotary element for coaxial connections, in particular for high-frequency conducting and / or high-voltage conducting connections.
  • the video and / or audio signals generated by the image and / or sound recording devices are transmitted from the aforementioned devices by means of transmission devices in the form of cable connections to the signals processing and / or processing facilities.
  • the image and / or sound recording devices are mounted on heads and carried by them, which in turn on stationary or movable carriers are suitably attached. These heads are regularly constructed in such a way that they allow the image and / or sound recording device to be moved in all three possible degrees of freedom, that is to say that this device or this head can also be rotated through 360 °.
  • the axis of rotation of the receiving head which is said to be rotatable through 360 °, was provided with a slip ring, slip ring constructions known from other areas of technology being provided between the rotating and fixed element of the receiving head, which admittedly inhibit the rotation of the previously limited cable connection in this Eliminated area, but at the same time showed significant other disadvantages for the transmission path of the video and / or audio signals.
  • These considerable disadvantages consisted in the fact that there is practically no possibility for the transmission of high-frequency signals to design the slip ring systems in such a way that they are at all positions relative to one another rotatable parts of the head have a constant wave resistance at all possible signal frequencies.
  • the object is achieved according to the invention by two tubular, mutually rotatable and conductively connected elements with an essentially circular cross-section, wherein in the tubular elements respective line elements are arranged axially, which are also rotatable and conductively connected to one another.
  • the advantage of the solution according to the invention consists essentially in the fact that a connection is created by means of the rotating element, which, when rotatable by any angle, ensures a constantly constant wave resistance of the connection, in which no reflections of the signals occur and no signal resonance occurs, the invention being used for transmission high-frequency signals a frequency bandwidth up to the gigahertz range is guaranteed.
  • Another significant advantage of the rotary element according to the invention is that practically no mechanical wear occurs, which affects the electrical or high-frequency transmission properties of the rotary connection created by means of the rotary element.
  • the two tubular elements are rotatably connected via contact elements formed at their respective mutually facing end regions, which on the one hand ensure that the tubular elements can be rotated very easily and without wear and on the other hand ensure very good conduction of the high-frequency signals is.
  • the two axial line elements are also rotatably connected via contact elements formed on their respective mutually facing end regions, so that a wear-free, mechanically smooth rotation at the same time is also good at this point Radio frequency line property of this connection is achieved.
  • the contact elements themselves can advantageously be made from rolls, i.e. consist of cylindrical or conical rollers, but contact elements made of balls are also suitable, the rollers and / or balls in the manner of a ball bearing over the circumference of the tubular elements or over the circumference in the end regions of the tubular elements and / or over the circumference are arranged in the end regions of the axial line elements.
  • rollers and / or balls are kept at a distance via roller and / or ball cages, as is found in normal roller and / or ball bearings, in such a way that the rollers and / or balls do not touch one another.
  • the cages, in which the rollers and / or balls run or with which they are kept at a distance, consist of non-conductive material, so that the rollers and / or balls are an electrically and high-frequency suitable contact element between the mutually rotatable tubular elements and opposite form the mutually rotatable contact elements. Undefined electrical or high-frequency transmission states can therefore not occur, since the cage made of electrically non-conductive material precludes undefined contact with the contact elements, be it in the form of rollers and / or balls.
  • the contact elements can consist of axially slotted end regions of the tubular elements and / or of the line elements, the axially slotted end regions are designed such that they deform slightly elastically when the tubular elements or the axial line elements are plugged together, so that the force counteracting the direction of deformation continuously ensures a defined pressure of the respective adjoining end regions, so that perfect electrical and high-frequency contact is ensured.
  • the interior of the tubular elements, which is not filled by the line elements, is preferably filled with an insulation agent, which can be formed, for example, from polytetrafluoroethylene (Teflon), the insulation agent ensuring a correct central axial position of the respective line elements in the tubular elements, i.e. acts to a certain extent as a defined spacer and, on the other hand, as a defined dielectric.
  • an insulation agent which can be formed, for example, from polytetrafluoroethylene (Teflon), the insulation agent ensuring a correct central axial position of the respective line elements in the tubular elements, i.e. acts to a certain extent as a defined spacer and, on the other hand, as a defined dielectric.
  • tubular elements there are many suitable options for supporting the tubular elements so that they can be rotated on the outside in such a way that an axial alignment of the two tubular elements is continuously ensured, which is mechanically stable and thus a continuously good electrical and high-frequency conduction of video and / or audio signals and possibly high-frequency high voltage.
  • An embodiment for this is advantageously proposed in that at least one tubular element is supported on the outside via one or more bearings on a carrier element.
  • This carrier element can itself be tubular, for example, so that the outer bearing or bearings, which possibly surround both of the tubular elements, are inserted into this carrier tube in a simple manner and are secure there can be held.
  • the carrier element is therefore preferably tubular with an essentially circular cross section.
  • the rotating element 10 consists essentially of two tubular elements 11, 12 which have a circular cross section.
  • the cross section of both tubular elements 11, 12 is dimensioned essentially the same.
  • Coaxial to the axis 25 of the tubular elements 11, 12 are each line elements 13, 14, which cross the tubular elements 11, 12 according to their length.
  • the line elements 13, 14 form the inner conductor of the rotary element, whereas the tubular elements 11, 12 completely surrounding the tubular line elements 13, 14 form the outer conductor of the rotary element 10.
  • the rotary element 10 shown in the single figure should, as far as the figurative representation is concerned, only be used here as an aid for understanding the basic structure.
  • the dimensioning of the cross section of the tubular elements 11, 12, of the line elements 13, 14 arranged in the axis 25, and of all the other elements, which will be described in detail below, can be of different dimensions depending on the application.
  • the two tubular elements 11, 12 have at their respective mutually facing end regions 15, 16 contact elements 17, via which the two tubular elements 11, 12 are rotatably and conductively connected to one another.
  • the contact elements 17 consist of balls which are formed over the circumferential surface of the tubular elements in the manner of a ball bearing.
  • the spherical contact elements 17 are held at a distance from one another in the circumferential direction by a cage (not shown here) for receiving the balls, the cage consisting of electrically non-conductive material.
  • the contact elements 17 form the actual electrical contact between the two tubular elements 11, 12.
  • an insulation means 22 which can consist, for example, of polytetrafluoroethylene (Teflon) and which includes the respective line elements 13, 14.
  • the insulation means 22 thus acts as a fastening member or spacer for the line elements 13, 14 in the respective tubular element 11, 12 and as a dielectric in connection with a transmission of high-frequency signals via the rotary element 10.
  • the two axial line elements 13, 14 are also over their mutually facing respective end regions 18, 19 formed contact elements 20 rotatably connected, these contact elements 20, just like the outer contact elements 17, here consist of balls, which are also kept at a distance from each other via a cage, not shown, made of electrically non-conductive material.
  • the contact elements 20 form in the form of balls together with the cage made of non-conductive material, which in total is a kind Form ball bearings, the actual electrical contacts between the two line elements 13, 14th
  • the contact elements 17, 20 can also consist of cylindrical or tapered rollers, it also being possible to design the contact elements 17, 20 in such a way that the respective end regions 15, 18 of the tubular elements 11, 12 and / or the line elements 13, 14 are axially slotted.
  • the end regions are dimensioned such that they are slightly spread apart when they mesh, so that the counterforce generated due to the elastic deformation associated therewith is sufficiently large to ensure that the end regions are constantly pressed sufficiently against one another with the aim of a continuous good Contact for the line of high-frequency video and / or audio signals and / or the line of high-frequency high voltage.
  • the entire rotating element 10 can in principle be accommodated in any suitable manner in a head for the mobility of an image and / or sound recording device, so that with a continuously correct axial alignment of both tubular elements 11, 12 a mutual rotation according to the arrows 26 is possible.
  • the tubular elements 11, 12 can be supported on the outside via bearings 23 in a tubular support element 24, so that the manufacturer already ensures a perfect axial alignment of both tubular elements 11, 12 is taken care of.
  • the number and type of arrangement of the bearings 23 in the single figure is also only to be understood schematically here.
  • the bearings 23 ensure the continuously required radial alignment of the tubular elements 11, 12 in the carrier element 24 and ensure that the contact elements 17, 20 do not tilt under any circumstances, ie mechanically neither radially nor axially, and with corresponding force components in between when the tubular elements 11 rotate, 12 are loaded, except for the load that is exerted by the radial force component desired according to the invention to ensure good electrical contact through the end regions 15, 16 or the end regions 18, 19 of the tubular elements 11, 12 or the line elements 13, 14.
  • the rotary element 10 permits the transmission of video and / or audio signals up to the gigahertz range and is also suitable for the transmission of high-frequency high voltage.
  • the rotating element 10 can also be used for the transmission of low-frequency signals or for the transmission of direct and alternating voltage and the like.
  • the rotating element 10 is a conductor with a constant characteristic impedance.

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Abstract

The rotating element includes two tubular elements (11,12) which are rotatable with respect to each other and which are conductively connected. The elements have a circular cross section. Cable elements (13,14) are axially arranged in each of the respective tubular elements. The cable elements are also rotatable with respect to each other and are conductively connected. In one embodiment the tubular elements are connected by contact elements (17) formed on each of their facing end regions (15,16).

Description

Die Erfindung betrifft ein Drehelement für koaxiale Verbindungen, insbesondere für hochfrequenzleitende und/oder hochspannungsleitende Verbindungen.The invention relates to a rotary element for coaxial connections, in particular for high-frequency conducting and / or high-voltage conducting connections.

Bei Bild- und/oder Tonaufzeichnungseinrichtungen, wie sie gemeinhin in Aufnahmestudios, in Sendeanstalten und auch im Freien verwenden werden, werden die von den Bild- und/oder Tonaufnahmeeinrichtungen erzeugten Video-und/oder Audiosignale von den vorgenannten Einrichtungen mittels Übertragungseinrichtungen in Form von Kabelverbindungen auf die Signale ver- und/oder bearbeitende Einrichtungen übertragen. Die Bild- und/oder Tonaufnahmeeinrichtungen werden dabei auf Köpfen montiert und von diesen getragen, die wiederum auf stationären oder bewegbaren Trägern geeignet befestigt sind. Diese Köpfe sind regelmäßig so aufgebaut, daß sie eine Bewegung der Bild- und/oder Tonaufzeichungseinrichtung in allen 3 möglichen Freiheitsgraden erlauben, d.h. auch ein Drehen dieser Einrichtung bzw. dieses Kopfes um 360°. Um eine Übertragung der hochfrequenten Video- und/oder Audiosignale von der Bild- und/oder Tonerfassungseinrichtung über diesen auch um 360° schwenkbaren Kopf über die Übertragungseinrichtung zur Ver- und/oder Bearbeitungseinrichtung der Video- und/oder Audiosignale zu gestatten, wurden zunächst einfache Kabelverbindungen vorgesehen, die ausreichend lang bemessen wurden, um ein mehrfaches Umsichselbstdrehen der Bild- und/oder Tonaufnahmeeinrichtung bzw. des diese aufnehmenden Aufnahmekopfes zu gestatten. Es hat sich jedoch gezeigt, daß eine derartig simple Technik erhebliche Nachteile mit sich bringt, da irgendwann die Drehbarkeit des Aufnahmekopfes mit darauf angeordneter Bild- und/oder Tonaufnahmeeinrichtung zu Ende ist, nämlich dann, wenn das Übertragungskabel mehrfach um diesen Bereich infolge des Drehens um den Aufnahmekopf gewickelt worden ist.In the case of image and / or sound recording devices, such as those commonly used in recording studios, in broadcasting stations and also outdoors, the video and / or audio signals generated by the image and / or sound recording devices are transmitted from the aforementioned devices by means of transmission devices in the form of cable connections to the signals processing and / or processing facilities. The image and / or sound recording devices are mounted on heads and carried by them, which in turn on stationary or movable carriers are suitably attached. These heads are regularly constructed in such a way that they allow the image and / or sound recording device to be moved in all three possible degrees of freedom, that is to say that this device or this head can also be rotated through 360 °. In order to allow the high-frequency video and / or audio signals to be transmitted from the image and / or sound detection device via this head, which can also be pivoted through 360 °, via the transmission device to the processing and / or processing device of the video and / or audio signals, simple first Cable connections are provided which have been dimensioned long enough to allow the image and / or sound recording device or the recording head receiving the same to rotate several times. It has been shown, however, that such a simple technique has considerable disadvantages, since at some point the rotatability of the recording head with the image and / or sound recording device arranged thereon ends, namely when the transmission cable rotates several times around this area as a result of the rotation the recording head has been wound.

Zur Abhilfe wurde deshalb die Drehachse des Aufnahmekopfes, die um 360° drehbar sein soll, mit einem Schleifring versehen, wobei zwischen drehendem und festem Element des Aufnahmekopfes aus anderen Bereichen der Technik bekannte Schleifringkonstruktionen vorgesehen, die zwar des Drehhemmnis der bisherigen begrenzt langen Kabelverbindung in diesem Bereich beseitigten, gleichzeitig aber erhebliche andere Nachteile für den Übertragungsweg der Video- und/oder Audiosignale zeigten. Diese erheblichen Nachteile bestanden darin, daß es für die Übertragung hochfrequenter Signale praktisch keine Möglichkeit gibt, die Schleifringsysteme derart auszu-bilden, daß sie bei allen Stellungen der zueinander drehbaren Teile des Kopfes bei allen möglichen Signalfrequenzen einen konstanten Wellenwiderstand aufweisen. Dieser erhebliche und an sich nicht tolerable Nachteil liegt im wesentlichen darin begründet, daß es auch mit den ausgefeiltesten Schleifringsystemen keine Gewähr für fortwährend absolute Kontaktgabe gibt, mit der Folge, daß untolerable Dämpfungen der Video- und/ oder Audiosignale und das Auftreten von resonanzfrequenten Signalen und Signalreflexionen schlechthin zu beobachten sind, was insbesondere bei hochwertigen Video- und/oder Audio-Produktionen unakzeptabel ist. Man hat sich deshalb vielfach wieder auf die alten Kabelverbindungen zurückgezogen mit allen damit verbundenen Nachteilen der Handhabbarkeitl, wobei allerdings mit einer Kabelverbindung wenigstens die Vorteil einer dämpfungs-, resonanz- und reflextionsfreien Verbindung zur Übertragung der Video- und/oder Audiosignale erreicht wird.To remedy this, the axis of rotation of the receiving head, which is said to be rotatable through 360 °, was provided with a slip ring, slip ring constructions known from other areas of technology being provided between the rotating and fixed element of the receiving head, which admittedly inhibit the rotation of the previously limited cable connection in this Eliminated area, but at the same time showed significant other disadvantages for the transmission path of the video and / or audio signals. These considerable disadvantages consisted in the fact that there is practically no possibility for the transmission of high-frequency signals to design the slip ring systems in such a way that they are at all positions relative to one another rotatable parts of the head have a constant wave resistance at all possible signal frequencies. This considerable and in itself intolerable disadvantage is essentially due to the fact that even with the most sophisticated slip ring systems there is no guarantee of continuous absolute contact, with the result that intolerable damping of the video and / or audio signals and the occurrence of resonance-frequency signals and Signal reflections are absolutely to be observed, which is particularly unacceptable for high-quality video and / or audio productions. One has therefore often withdrawn back to the old cable connections with all the associated disadvantages of manageability, although with a cable connection at least the advantage of an attenuation, resonance and reflection-free connection for transmitting the video and / or audio signals is achieved.

Es ist somit Aufgabe der vorliegenden Erfindung ein Drehelement für koaxiale Verbindungen der eingangs genannten Art zu schaffen, das eine dämpfungs-, resonanz- und reflexionsfreie Übertragung hochfrequenter Signale bei konstanten Wellenwiderstand bei ungehemmter Verdrehung der Drehelementteile zueinander mittels des Drehelementes erlaubt, wobei die bisherigen Nachteile dafür verwendeter Kabelverbindungen vollständig entfallen und wobei das Drehelement einfach im Aufbau und kostengünstig herstellbar sein soll und das Drehelement auch derart universell einsetzbar sein soll, daß anstelle der Übertragung hochfrequenter Video- und/oder Audiosignale auch hochfrequente Hochspannung übertragen werden kann.It is therefore an object of the present invention to provide a rotary element for coaxial connections of the type mentioned at the outset, which allows high-frequency signals to be transmitted without damping, resonance and reflection and constant wave resistance with uninhibited rotation of the rotary element parts relative to one another by means of the rotary element, with the previous disadvantages for this cable connections used are completely eliminated and the rotary element should be simple in construction and inexpensive to manufacture and the rotary element should also be universally applicable such that high-frequency high voltage can be transmitted instead of the transmission of high-frequency video and / or audio signals.

Gelöst wird die Aufgabe gemäß der Erfindung durch zwei rohrförmige, gegeneinander drehbare und leitend verbundene Elemente mit im wesentlichen kreisförmigem Querschnitt, wobei in den rohrförmigen Elementen axial jeweilige Leitungselemente angeordnet sind, die ebenfalls gegeneinander drehbar und leitend verbunden sind.The object is achieved according to the invention by two tubular, mutually rotatable and conductively connected elements with an essentially circular cross-section, wherein in the tubular elements respective line elements are arranged axially, which are also rotatable and conductively connected to one another.

Der Vorteil der erfindungsgemäßen Lösung besteht im wesentlichen darin, daß eine Verbindung mittels des Drehelementes geschaffen wird, die bei Drehbarkeit um beliebige Winkel einen fortwährend konstanten Wellenwiderstand der Verbindung gewährleistet, bei dem keine Reflexionen der Signale auftreten und keine Signalresonanz auftritt, wobei erfindungsgemäß bei der Übertragung hochfrequenter Signale eine Frequenzbandbreite bis in den Giga-Hertz-Bereich gewährleistet ist. Ein weiterer wesentlicher Vorteil des erfindungsgemäßen Drehelementes besteht darin, daß praktisch kein mechanischer Verschleiß auftritt, der die elektrischen bzw. hochfrequenten Übertragungseigenschaften der mittels des Drehelements geschaffenen Drehverbindung beeinträchtigt.The advantage of the solution according to the invention consists essentially in the fact that a connection is created by means of the rotating element, which, when rotatable by any angle, ensures a constantly constant wave resistance of the connection, in which no reflections of the signals occur and no signal resonance occurs, the invention being used for transmission high-frequency signals a frequency bandwidth up to the gigahertz range is guaranteed. Another significant advantage of the rotary element according to the invention is that practically no mechanical wear occurs, which affects the electrical or high-frequency transmission properties of the rotary connection created by means of the rotary element.

Bei einer vorteilhaften Ausgestaltung der Erfindung sind die beiden rohrförmigen Elemente über an ihren jeweiligen einander zugewandten Endbereichen ausgebildeten Kontaktelemente drehbar verbunden, die einerseits dafür sorgen, daß eine sehr leichtgängige und verschleißfreie Verdrehbarkeit der rohrförmigen Elemente gewährleistet ist und andererseits eine sehr gute Leitung der hochfrequenten Signale gewährleistet ist. Vorteilhafterweise sind ebenfalls die beiden axialen Leitungselemente über an ihren jeweiligen einander zugewandten Endbereichen ausgebildete Kontaktelemente drehbar verbunden, so daß auch an dieser Stelle eine verschleißfreie mechanisch leichtgängige Verdrehbarkeit bei gleichzeitig guter Hochfrequenzleitungseigenschaft dieser Verbindung erreicht wird.In an advantageous embodiment of the invention, the two tubular elements are rotatably connected via contact elements formed at their respective mutually facing end regions, which on the one hand ensure that the tubular elements can be rotated very easily and without wear and on the other hand ensure very good conduction of the high-frequency signals is. Advantageously, the two axial line elements are also rotatably connected via contact elements formed on their respective mutually facing end regions, so that a wear-free, mechanically smooth rotation at the same time is also good at this point Radio frequency line property of this connection is achieved.

Die Kontaktelemente selbst können vorteilhafterweise aus Rollen, d.h. aus zylindrischen oder kegelförmigen Rollen bestehen, vorzugsweise eignen sich aber auch Kontaktelemente aus Kugeln, wobei die Rollen und/oder Kugeln nach Art eines Kugellagers über den Umfang der rohrförmigen Elemente bzw. über den Umfang in den Endbereichen der rohrförmigen Elemente und/oder über den Umfang in den Endbereichen der axialen Leitungselemente angeordnet sind.The contact elements themselves can advantageously be made from rolls, i.e. consist of cylindrical or conical rollers, but contact elements made of balls are also suitable, the rollers and / or balls in the manner of a ball bearing over the circumference of the tubular elements or over the circumference in the end regions of the tubular elements and / or over the circumference are arranged in the end regions of the axial line elements.

Dabei werden die Rollen und/oder Kugeln über Rollen-und/oder Kugelkäfige, wie es bei normalen Rollen-und/oder Kugellagern anzutreffen ist, derart auf Abstand gehalten, daß die Rollen und/oder Kugeln sich untereinander nicht berühren. Die Käfige, in denen die Rollen und/oder Kugeln laufen bzw. mit denen sie auf Abstand gehalten werden, bestehen dabei aus nichtleitendem Werkstoff, so daß die Rollen und/oder Kugeln ein elektrisch- und hochfrequenzgeeignetes Kontaktelement zwischen den gegeneinander drehbaren rohrförmigen Elementen und gegenüber den gegeneinander drehbaren Kontaktelementen bilden. Undefinierte elektrische oder hochfrequente Übertragungszustände können somit nicht auftreten, da der Käfig aus elektrisch nichtleitendem Werkstoff ein undefiniertes Berühren der Kontaktelemente, sei es in Form von Rollen und/oder Kugeln, ausschließt.The rollers and / or balls are kept at a distance via roller and / or ball cages, as is found in normal roller and / or ball bearings, in such a way that the rollers and / or balls do not touch one another. The cages, in which the rollers and / or balls run or with which they are kept at a distance, consist of non-conductive material, so that the rollers and / or balls are an electrically and high-frequency suitable contact element between the mutually rotatable tubular elements and opposite form the mutually rotatable contact elements. Undefined electrical or high-frequency transmission states can therefore not occur, since the cage made of electrically non-conductive material precludes undefined contact with the contact elements, be it in the form of rollers and / or balls.

Bei einer anderen vorteilhaften Ausführungsform können die Kontaktelemente aus axial geschlitzten Endbereichen der rohrförmigen Elemente und/oder der Leitungselemente bestehen, wobei die axial geschlitzten Endbereiche derart ausgebildet sind, daß sie sich beim Zusammenstecken der rohrförmigen Elemente bzw. der axialen Leitungselemente geringfügig elastisch verformen, so daß fortwährend die der Verformungsrichtung entgegenwirkende Kraft für einen definierten Andruck der jeweiligen aneinanderliegenden Endbereiche sorgt, so daß ein einwandfreier elektrischer und hochfrequenter Kontakt gewährleistet ist.In another advantageous embodiment, the contact elements can consist of axially slotted end regions of the tubular elements and / or of the line elements, the axially slotted end regions are designed such that they deform slightly elastically when the tubular elements or the axial line elements are plugged together, so that the force counteracting the direction of deformation continuously ensures a defined pressure of the respective adjoining end regions, so that perfect electrical and high-frequency contact is ensured.

Der von den Leitungselementen nicht ausgefüllte Innenraum der rohrförmigen Elemente ist vorzugsweise mit einem Isolationsmittel angefüllt, das beispielsweise aus Polytetrafluoräthylen (Teflon) ausgebildet sein kann, wobei das Isolationsmittel für eine ordnungsgemäße zentralaxiale Stellung der jeweiligen Leitungselemente in den rohrförmigen Elementen sorgt, d.h. gewissermaßen als definierter Abstandshalter wirkt und andererseits als definiertes Dielektrikum.The interior of the tubular elements, which is not filled by the line elements, is preferably filled with an insulation agent, which can be formed, for example, from polytetrafluoroethylene (Teflon), the insulation agent ensuring a correct central axial position of the respective line elements in the tubular elements, i.e. acts to a certain extent as a defined spacer and, on the other hand, as a defined dielectric.

Es gibt grundsätzlich viele geeignete Möglichkeiten, die rohrförmigen Elemente derart drehbar außen abzustützen, daß fortwährend eine axiale Ausrichtung der beiden rohrförmigen Elemente gewährleistet ist, die mechanisch stabil ist und somit eine fortwährend gute elektrische und hochfrequente Leitung von Video- und/oder Audiosignalen und ggf. hochfrequenter Hochspannung ermöglicht. Vorteilhafterweise wird eine Ausbildung dafür dadurch vorgeschlagen, daß wenigstens ein rohrförmiges Element außen über ein oder mehrere Lager an einem Trägerelement abgestützt wird.In principle, there are many suitable options for supporting the tubular elements so that they can be rotated on the outside in such a way that an axial alignment of the two tubular elements is continuously ensured, which is mechanically stable and thus a continuously good electrical and high-frequency conduction of video and / or audio signals and possibly high-frequency high voltage. An embodiment for this is advantageously proposed in that at least one tubular element is supported on the outside via one or more bearings on a carrier element.

Dieses Trägerelement kann beispielsweise selbst wiederum rohrförmig sein, so daß das oder die Außenlager, die die rohrförmigen Elemente ggf. beide umgeben, in dieses Trägerrohr auf einfache Weise eingesetzt und dort sicher gehalten werden kann bzw. können. Somit ist für diesen Fall das Trägerelement vorzugsweise rohrförmig mit im wesentlichen kreisförmigem Querschnitt ausgebildet.This carrier element can itself be tubular, for example, so that the outer bearing or bearings, which possibly surround both of the tubular elements, are inserted into this carrier tube in a simple manner and are secure there can be held. In this case, the carrier element is therefore preferably tubular with an essentially circular cross section.

Die Erfindung wird nun unter Bezugnahme auf die nachfolgende einzige schematische Zeichnung beschrieben. Diese zeigt:
   Im Schnitt zwei rohrförmige Elemente, die drehbar und leitend miteinander verbunden sind und die außen von Kugellagern gehalten werden.The invention will now be described with reference to the following single schematic drawing. This shows:
On average two tubular elements that are rotatably and conductively connected to each other and that are held on the outside by ball bearings.

Das Drehelement 10 besteht im wesentlichen aus zwei rohrförmigen Elementen 11, 12, die einen kreisförmigen Querschnitt aufweisen. Der Querschnitt beider rohrförmigen Elemente 11, 12 ist im wesentlichen gleich dimensioniert. Koaxial zur Achse 25 der rohrförmigen Elemente 11, 12 sind jeweils Leitungselemente 13, 14 angeordnet, die die rohrförmigen Elemente 11, 12 entsprechend deren Länge durchqueren. Die Leitungselemente 13, 14 bilden den Innenleiter des Drehelements, wohingegen die die rohrförmigen Leitungselemente 13, 14 vollständig umgebenden rohrförmigen Elemente 11, 12 den Außenleiter des Drehelements 10 bilden.The rotating element 10 consists essentially of two tubular elements 11, 12 which have a circular cross section. The cross section of both tubular elements 11, 12 is dimensioned essentially the same. Coaxial to the axis 25 of the tubular elements 11, 12 are each line elements 13, 14, which cross the tubular elements 11, 12 according to their length. The line elements 13, 14 form the inner conductor of the rotary element, whereas the tubular elements 11, 12 completely surrounding the tubular line elements 13, 14 form the outer conductor of the rotary element 10.

Das in der einzigen Figur dargestellte Drehelement 10 soll, was die figürliche Darstellung angeht, hier nur als Hilfe für das Verständnis des Grundaufbaus herangezogen werden. Die Dimensionierung des Querschnitts der rohrförmigen Elemente 11, 12, der der in der Achse 25 angeordneten Leitungselemente 13, 14, sowie aller übrigen Elemente, die noch nachfolgend im einzelnen beschrieben werden, können je nach Anwendungsfall unterschiedlich dimensioniert ausgebildet sein.The rotary element 10 shown in the single figure should, as far as the figurative representation is concerned, only be used here as an aid for understanding the basic structure. The dimensioning of the cross section of the tubular elements 11, 12, of the line elements 13, 14 arranged in the axis 25, and of all the other elements, which will be described in detail below, can be of different dimensions depending on the application.

Die beiden rohrförmigen Elemente 11, 12 weisen an ihren jeweiligen einander zugewandten Endbereichen 15, 16 Kontaktelemente 17 auf, über die beide rohrförmigen Elemente 11, 12 drehbar und leitend miteinander verbunden sind. Bei dem in der Figur dargestellten Ausführungsbeispiel des Drehelements 10 bestehen die Kontaktelemente 17 aus Kugeln, die über die Umfangsfläche der rohrförmigen Elemente verteilt nach Art eines Kugellagers ausgebildet sind. Die kugelförmigen Kontaktelemente 17 werden durch einen hier nicht dargestellten Käfig zur Aufnahme der Kugeln in Umfangsrichtung in Abstand voneinander gehalten, wobei der Käfig aus elektrisch nichtleitenden Werkstoff besteht. Die Kontaktelemente 17 bilden den eigentlichen elektrischen Kontakt zwischen den beiden rohrförmigen Elementen 11, 12.The two tubular elements 11, 12 have at their respective mutually facing end regions 15, 16 contact elements 17, via which the two tubular elements 11, 12 are rotatably and conductively connected to one another. In the exemplary embodiment of the rotary element 10 shown in the figure, the contact elements 17 consist of balls which are formed over the circumferential surface of the tubular elements in the manner of a ball bearing. The spherical contact elements 17 are held at a distance from one another in the circumferential direction by a cage (not shown here) for receiving the balls, the cage consisting of electrically non-conductive material. The contact elements 17 form the actual electrical contact between the two tubular elements 11, 12.

Im Innenraum 21 der rohrförmigen Elemente 11, 12 ist ein Isolationsmittel 22 vorgesehen, das beispielsweise aus Polytetrafluoräthylen (Teflon) bestehen kann, und das die jeweiligen Leitungselemente 13, 14 einschließt. Das Isolationsmittel 22 wirkt somit als Befestigungsorgan bzw. Abstandshalter für die Leitungselemente 13, 14 im jeweiligen rohrförmigen Element 11, 12 und als Dielektrikum im Zusammenhang mit einer Übertragung hochfrequenter Signale über das Drehelement 10. Die beiden axialen Leitungselemente 13, 14 sind ebenfalls über an ihren einander zugewandten jeweiligen Endbereichen 18, 19 ausgebildete Kontaktelemente 20 drehbar verbunden, wobei diese Kontaktelemente 20, genau wie die äußeren Kontaktelemente 17, hier aus Kugeln bestehen, die ebenfalls über einen hier nicht dargestellten Käfig aus elektrisch nichtleitenden Werkstoff auf Abstand voneinander gehalten werden. Auch hier bilden die Kontaktelemente 20 in Form von Kugeln zusammen mit dem Käfig aus nichtleitenden Werkstoff, die insgesamt eine Art Kugellager bilden, die eigentlichen elektrischen Kontakte zwischen den beiden Leitungselementen 13, 14.In the interior 21 of the tubular elements 11, 12, an insulation means 22 is provided, which can consist, for example, of polytetrafluoroethylene (Teflon) and which includes the respective line elements 13, 14. The insulation means 22 thus acts as a fastening member or spacer for the line elements 13, 14 in the respective tubular element 11, 12 and as a dielectric in connection with a transmission of high-frequency signals via the rotary element 10. The two axial line elements 13, 14 are also over their mutually facing respective end regions 18, 19 formed contact elements 20 rotatably connected, these contact elements 20, just like the outer contact elements 17, here consist of balls, which are also kept at a distance from each other via a cage, not shown, made of electrically non-conductive material. Here too, the contact elements 20 form in the form of balls together with the cage made of non-conductive material, which in total is a kind Form ball bearings, the actual electrical contacts between the two line elements 13, 14th

Die Kontaktelemente 17, 20 können aber auch aus zylindrischen oder kegeligen Rollen bestehen, wobei es ebenfalls möglich ist, die Kontaktelemente 17, 20 derart auszubilden, daß die jeweiligen Endbereiche 15, 18 der rohrförmigen Elemente 11, 12 und/oder der Leitungselemente 13, 14 axial geschlitzt sind. Die Endbereiche sind bei einer derartigen Ausgestaltung derart dimensioniert, daß sie beim jeweiligen Ineinandergreifen geringfügig aufgespreizt werden, so daß die aufgrund der damit verbundenen elastischen Verformung erzeugte Gegenkraft ausreichend groß ist, um fortwährend einen ausreichenden Andruck der Endbereiche gegeneinander zu gewährleisten mit dem Ziel einer fortwährenden guten Kontaktgabe für die Leitung hochfrequenter Video- und/oder Audiosignale und/oder die Leitung hochfrequenter Hochspannung.However, the contact elements 17, 20 can also consist of cylindrical or tapered rollers, it also being possible to design the contact elements 17, 20 in such a way that the respective end regions 15, 18 of the tubular elements 11, 12 and / or the line elements 13, 14 are axially slotted. In such a configuration, the end regions are dimensioned such that they are slightly spread apart when they mesh, so that the counterforce generated due to the elastic deformation associated therewith is sufficiently large to ensure that the end regions are constantly pressed sufficiently against one another with the aim of a continuous good Contact for the line of high-frequency video and / or audio signals and / or the line of high-frequency high voltage.

Das gesamte Drehelement 10 kann grundsätzlich auf beliebige geeignete Weise in einem Kopf für die Bewegbarkeit einer Bild- und/oder Tonaufnahmeeinrichtung aufgenommen werden, so daß bei einer fortwährend einwandfrei axialen Ausrichtung beider rohrförmigen Elemente 11, 12 eine gegenseitige Verdrehbarkeit entsprechend der Pfeile 26 möglich ist. Um aber eine derartige konstant axiale Ausrichtung beider rohrförmigen Elemente 11, 12 mit einfachen Mitteln zu gewährleisten, können die rohrförmigen Elemente 11, 12 außen über Lager 23 in einem rohrförmigen Trägerelement 24 abgestützt werden, so daß schon herstellungsseitig für eine einwandfreie axiale Ausrichtung beider rohrförmigen Elemente 11, 12 gesorgt ist. Auch die Anzahl und die Art der Anordnung der Lager 23 in der einzigen Figur ist hier lediglich schematisch zu verstehen. Die Lager 23 gewährleisten die fortwährend erforderliche radiale Ausrichtung der rohrförmigen Elemente 11, 12 im Trägerelement 24 und stellen sicher, daß die Kontaktelemente 17, 20 unter keinen Umständen verkanten, d.h. mechanisch weder radial noch axial, sowie mit entsprechenden dazwischenliegenden Kraftkomponenten bei der Drehung der rohrförmigen Elemente 11, 12 belastet werden, außer der Belastung, die durch die erfindungsgemäß gewollte radiale Kraftkomponente zur Sicherstellung eines guten elektrischen Kontakts durch die Endbereiche 15, 16 bzw. die Endbereiche 18, 19 der rohrförmigen Elemente 11, 12 bzw. der Leitungselemente 13, 14 ausgeübt wird.The entire rotating element 10 can in principle be accommodated in any suitable manner in a head for the mobility of an image and / or sound recording device, so that with a continuously correct axial alignment of both tubular elements 11, 12 a mutual rotation according to the arrows 26 is possible. However, in order to ensure such a constant axial alignment of both tubular elements 11, 12 with simple means, the tubular elements 11, 12 can be supported on the outside via bearings 23 in a tubular support element 24, so that the manufacturer already ensures a perfect axial alignment of both tubular elements 11, 12 is taken care of. The number and type of arrangement of the bearings 23 in the single figure is also only to be understood schematically here. The bearings 23 ensure the continuously required radial alignment of the tubular elements 11, 12 in the carrier element 24 and ensure that the contact elements 17, 20 do not tilt under any circumstances, ie mechanically neither radially nor axially, and with corresponding force components in between when the tubular elements 11 rotate, 12 are loaded, except for the load that is exerted by the radial force component desired according to the invention to ensure good electrical contact through the end regions 15, 16 or the end regions 18, 19 of the tubular elements 11, 12 or the line elements 13, 14.

Durch hier im einzelnen nicht dargestellte Maßnahmen muß sichergestellt sein, daß die Lager 23 gegenüber dem Trägerelement 24 elektrisch isoliert ausgebildet sind.Measures not shown in detail here must ensure that the bearings 23 are electrically insulated from the carrier element 24.

Das erfindungsgemäße Drehelement 10 gestattet eine Übertragung von Video- und/oder Audiosignalen bis in den Giga-Hertz Bereich und ist auch zur Übertragung hochfrequenter Hochspannung geeignet. Das Drehelement 10 kann ebensogut auch zur Übertragung von niederfrequenten Signalen oder zur Übertragung von Gleich- und Wechselspannung und dergleichen benutzt werden. Bei der Übertragung hochfrequenter Signale stellt das Drehelement 10 einen Leiter mit konstantem Wellenwiderstand dar.The rotary element 10 according to the invention permits the transmission of video and / or audio signals up to the gigahertz range and is also suitable for the transmission of high-frequency high voltage. The rotating element 10 can also be used for the transmission of low-frequency signals or for the transmission of direct and alternating voltage and the like. When transmitting high-frequency signals, the rotating element 10 is a conductor with a constant characteristic impedance.

BezugszeichenlisteReference list

1010th
DrehelementRotating element
1111
rohrförmiges Elementtubular element
1212th
rohrförmiges Elementtubular element
1313
LeitungselementPipe element
1414
LeitungselementPipe element
1515
Endbereich rohrförmiges ElementEnd section tubular element
1616
Endbereich rohrförmiges ElementEnd section tubular element
1717th
KontaktelementContact element
1818th
Endbereich LeitungselementEnd area line element
1919th
Endbereich LeitungselementEnd area line element
2020th
KontaktelementContact element
2121
Innenrauminner space
2222
IsolationsmittelInsulation
2323
Lagercamp
2424th
TrägerelementCarrier element
2525th
Achseaxis
2626
Pfeilarrow

Claims (10)

Drehelement für koaxiale Verbindungen, insbesondere für hochfrequenzleitende und/oder hochspannungsleitende Verbindungen, gekennzeichnet durch zwei rohrförmige, gegeneinander drehbare und leitend verbundene Elemente (11, 12) mit im wesentlichen kreisförmigem Querschnitt, wobei in den rohrförmigen Elementen (11, 12) axial jeweilige Leitungselemente (13, 14) angeordnet sind, die ebenfalls gegeneinander drehbar und leitend verbunden sind.Rotary element for coaxial connections, in particular for high-frequency conductive and / or high-voltage conductive connections, characterized by two tubular, mutually rotatable and conductively connected elements (11, 12) with an essentially circular cross-section, wherein in the tubular elements (11, 12) axially respective line elements ( 13, 14) are arranged, which are also rotatable relative to one another and conductively connected. Drehelement nach Anspruch 1, dadurch gekennzeichnet, daß die beiden rohrförmigen Elemente (11, 12) über ihren jeweiligen einander zu gewandten Endbereichen (15, 16) ausgebildete Kontaktelemente (17) drehbar verbunden sind.Rotary element according to claim 1, characterized in that the two tubular elements (11, 12) are rotatably connected via their respective end regions (15, 16) which face each other. Drehelement nach einem oder mehreren der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die beiden axialen Leitungselemente (13, 14) über an ihren jeweiligen einander zugewandten Endbereichen (18, 19) ausgebildete Kontaktelemente (20) drehbar verbunden sind.Rotary element according to one or more of claims 1 or 2, characterized in that the two axial line elements (13, 14) are rotatably connected via contact elements (20) formed on their respective mutually facing end regions (18, 19). Drehelement nach einem oder beiden der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Kontaktelemente (17; 20) aus Rollen bestehen.Rotary element according to one or both of claims 2 or 3, characterized in that the contact elements (17; 20) consist of rollers. Drehelement nach einem oder beiden der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Kontaktelemente (17; 20) aus Kugeln bestehen.Rotary element according to one or both of claims 2 or 3, characterized in that the contact elements (17; 20) consist of balls. Drehelement nach einem mehreren der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Kontaktelemente (17; 20) aus axial geschlitzten Endbereichen (15; 18) der rohrförmigen Elemente (11, 12) und/oder der Leitungselemente (13, 14) bestehen.Rotary element according to one of claims 2 or 3, characterized in that the contact elements (17; 20) consist of axially slotted end regions (15; 18) of the tubular elements (11, 12) and / or the line elements (13, 14). Drehelement nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der von den Leitungselementen (13, 14) nicht eingenommene Innenraum (21) der rohrförmigen Elemente (11, 12) mit einem Isolationsmittel (22) angefüllt ist.Rotary element according to one or more of claims 1 to 6, characterized in that the interior (21) of the tubular elements (11, 12) which is not occupied by the line elements (13, 14) is filled with an insulation means (22). Drehelement nach Anspruch 7, dadurch gekennzeichnet, daß das Isolationsmittel (22) Polytetrafluoräthylen (Teflon) ist.Rotary element according to claim 7, characterized in that the insulation means (22) is polytetrafluoroethylene (Teflon). Drehelement nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß wenigstens ein rohrförmiges Element (11, 12) außen über ein oder mehrere Lager (23) an einem Trägerelement (24) abgestützt wird.Rotary element according to one or more of claims 1 to 8, characterized in that at least one tubular element (11, 12) is supported on the outside via one or more bearings (23) on a carrier element (24). Drehelement auch Anspruch 9, dadurch gekennzeichnet, daß das Trägerelement (24) rohrförmig mit im wesentlichen kreisförmigem Querschnitt ausgebildet ist.Rotary element also claim 9, characterized in that the carrier element (24) is tubular with an essentially circular cross-section.
EP96116034A 1995-10-10 1996-10-07 Rotary member for coaxial connections Withdrawn EP0768738A1 (en)

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DE1995137649 DE19537649C2 (en) 1995-10-10 1995-10-10 Rotary element for coaxial connection
DE19537649 1995-10-10

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2011151081A1 (en) * 2010-06-04 2011-12-08 Ondal Industrietechnik Gmbh Rotatable electrical coupling device
CN103004037A (en) * 2010-06-04 2013-03-27 欧达尔医疗系统 Rotatable electrical coupling device
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CN103004037B (en) * 2010-06-04 2016-08-03 欧达尔医疗系统 Rotatable electric coupling device
CN108987859A (en) * 2018-07-13 2018-12-11 中国船舶重工集团公司第七二四研究所 A kind of multichannel broadband high-power microwave rotary gemel and its implementation

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DE19537649C2 (en) 1999-03-25

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