EP2295621A1 - Friction motor spindle - Google Patents

Friction motor spindle Download PDF

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Publication number
EP2295621A1
EP2295621A1 EP10171587A EP10171587A EP2295621A1 EP 2295621 A1 EP2295621 A1 EP 2295621A1 EP 10171587 A EP10171587 A EP 10171587A EP 10171587 A EP10171587 A EP 10171587A EP 2295621 A1 EP2295621 A1 EP 2295621A1
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EP
European Patent Office
Prior art keywords
motor
friction
electric motor
spindle
spindle according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10171587A
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German (de)
French (fr)
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EP2295621B1 (en
Inventor
Johann Egbers
Uwe Junginger
Jürgen Mümmler
Günter Schmid
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP2295621A1 publication Critical patent/EP2295621A1/en
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/06—Spindles
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/082—Rollers or other friction causing elements with the periphery of at least one disc

Definitions

  • the invention relates to a suitable for use in a Fritationsfalschdrallaggregat friction motor spindle according to the preamble of claim 1.
  • a generic friction motor spindle is from the EP 0 828 872 B1 with particular reference to Figures 14 and 15 of said document.
  • the friction false-twist unit disclosed therein comprises three friction motor spindles each having an electric direct drive. To synchronize the three spindles, each spindle in addition to the electric direct drive on a spur gear, wherein a toothed belt is placed on the three spur gears.
  • the invention has for its object to provide a suitable for a Fritationsfalschdrallaggregat, having an electric direct drive motor spindle, which in a compact, production-friendly structure by particularly favorable mechanical properties, in particular vibration properties, distinguished.
  • the friction motor spindle comprises a storage unit for a spindle, namely friction spindle, provided bearing unit, which includes two axially spaced rolling bearings, and provided for direct drive of the spindle, no own storage having electric motor.
  • a transmission element which is provided as part of a belt transmission, rotatably connected, wherein the electric motor of the bearing unit is immediately adjacent.
  • the electric motor is arranged axially between the gear element and the bearing unit.
  • the electric motor is arranged on the side facing away from the transmission element of the bearing unit.
  • the bearing unit preferably represents a preassembled structural unit with two bearings axially preloaded against each other, in particular ball bearings.
  • the electric motor is designed as an external rotor, wherein preferably its rotor projects beyond the bearing unit in the radial direction.
  • This embodiment is characterized by a high torque of the electric direct drive.
  • the air gap formed between the stator and the rotor of the electric motor is arranged radially outside of the outer rolling body raceways of the bearing unit.
  • the electric motor-the electric motor is designed as an internal rotor. In this case, no rotating parts are present on the outer circumference of the electric motor.
  • the synchronous motor of the friction motor spindle can be designed either as an AC motor or as a DC motor. Further, as possible engine types an asynchronous motor and an electronically commutated DC motor can be mentioned.
  • a reluctance motor which can be used as drive of the friction motor spindle, in particular a switched reluctance motor or a reluctance stepping motor, has advantages.
  • Such a motor has no magnets.
  • a reluctance motor designed as a stepping motor only requires a simply constructed motor drive electronics. The lower torque density of reluctance motors compared to permanent magnet synchronous motors is sufficient in many applications.
  • the rotor of the electric motor or a component of the rotor of the electric motor may be formed integrally with the spindle.
  • the rotor may be rotatably connected to the spindle, for example, by a press or adhesive connection.
  • the electric direct drive that is, gearless electric drive, sensorless vector control, a U / f control or control via a mounted on the electric motor or built-in rotation angle position transmitter.
  • a designated generally by the reference numeral 1 friction motor spindle is intended for installation in a friction false-twist unit, with respect to its principal function on the above-mentioned prior art and on the DE 10 2005 023 928 A1 is referenced.
  • the friction motor spindle 1 comprises an electric motor 2 which is provided for the direct drive of a spindle 3, which carries not shown friction discs.
  • the bearing of the spindle 3 and the electric motor 2 by means of a bearing unit 4, the two rolling bearings 5, namely axially against each other preloaded ball bearings, and in the embodiments of the Figures 1 and 2 is arranged axially between the electric motor 2 and a nnem for supporting the friction discs provided section 6 of the spindle 3.
  • the electric motor 2 is arranged between the bearing unit 4 and the section 6 of the spindle 3.
  • the electric motor 2 which works as well as the rotatable gear element 7 without its own bearing, has a stator 8 and a rotor 9, wherein the stator 8 has electric coils 10 that can be supplied with energy via lines, not shown, while the rotor 9 has permanent magnets 11, in particular rare earth magnets, is equipped. Between the stator 8 and the rotor 9, an air gap 12 is formed.
  • the rotor 9 is designed as a cup-shaped outer rotor and equipped on its cylindrical inner wall with the permanent magnet 11.
  • the annular air gap 12 is arranged radially outside of the pitch circle described by the center points of the individual rolling bodies 13, namely balls, of a roller bearing 5.
  • this relation applies to each of the rolling bearings. Due to the large diameter of the annular air gap 12, a high torque can be generated even without costly cooling of the electric motor 2, whereby a compact form of the friction motor spindle 1 remains given by the thin-walled construction of the rotor 9.
  • the energizable coils 12 are connected via an intermediate piece 14, which has two hollow cylindrical sections of different diameters and is attributable to the stator 8, fixedly connected to a non-rotating jacket 15 of the bearing unit 4.
  • the concentric to the intermediate piece 14 spindle 3 is inserted through this without contact with the intermediate piece 14 and connected via a Verwarschellesskontur not shown with a disc-shaped bottom portion 16 of the rotor 9 and the transmission element 7.
  • the permanent magnets 11 are applied directly to the spindle 3, for example glued, while the stator 8 is fixed in this case by means of an intermediate piece 14 to the bearing unit 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

The spindle (3) has a bearing unit (4) comprising two roller bearings (5) e.g. ball bearings, which are axially placed at a distance from one another. An electric motor (2) is provided for directly driving the spindle without a bearing. A gear element (7) e.g. crown gear, is connected with the spindle in a twist-proof manner and forms a part of a belt drive. The electric motor is placed immediately near the bearing unit and formed as a synchronous motor, asynchronous motor, permanent magnet excited motor, electronically commutated direct current (DC) motor or reluctance motor.

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft eine zur Verwendung in einem Friktionsfalschdrallaggregat geeignete Friktions-Motorspindel nach dem Oberbegriff des Anspruchs 1.The invention relates to a suitable for use in a Friktionsfalschdrallaggregat friction motor spindle according to the preamble of claim 1.

Hintergrund der ErfindungBackground of the invention

Eine gattungsgemäße Friktions-Motorspindel ist aus der EP 0 828 872 B1 bekannt, wobei insbesondere auf die Figuren 14 und 15 des genannten Dokuments verwiesen wird. Das darin offenbarte Friktionsfalschdrallaggregat umfasst drei Friktions-Motorspindeln, welche jeweils einen elektrischen Direktantrieb aufweisen. Zur Synchronisation der drei Spindeln weist jede Spindel zusätzlich zum elektrischen Direktantrieb ein Stirnrad auf, wobei ein Zahnriemen auf die drei Stirnräder aufgelegt ist.A generic friction motor spindle is from the EP 0 828 872 B1 with particular reference to Figures 14 and 15 of said document. The friction false-twist unit disclosed therein comprises three friction motor spindles each having an electric direct drive. To synchronize the three spindles, each spindle in addition to the electric direct drive on a spur gear, wherein a toothed belt is placed on the three spur gears.

Aufgabe der ErfindungObject of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine für ein Friktionsfalschdrallaggregat geeignete, einen elektrischen Direktantrieb aufweisende Motorspindel anzugeben, welche sich bei kompaktem, fertigungsfreundlichem Aufbau durch besonders günstige mechanische Eigenschaften, insbesondere Schwingungseigenschaften, auszeichnet.The invention has for its object to provide a suitable for a Friktionsfalschdrallaggregat, having an electric direct drive motor spindle, which in a compact, production-friendly structure by particularly favorable mechanical properties, in particular vibration properties, distinguished.

Zusammenfassung der ErfindungSummary of the invention

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Friktions-Motorspindel mit den Merkmalen des Anspruchs 1. Die Friktions-Motorspindel umfasst eine zur Lagerung einer Spindel, nämlich Friktionsspindel, vorgesehene Lagereinheit, welche zwei axial voneinander beabstandete Wälzlager einschließt, sowie einen zum Direktantrieb der Spindel vorgesehenen, keine eigene Lagerung aufweisenden Elektromotor. Mit der Spindel ist ein Getriebeelement, welches als Teil eines Umschlingungsgetriebes vorgesehen ist, drehfest verbunden, wobei der Elektromotor der Lagereinheit unmittelbar benachbart ist.This object is achieved by a friction motor spindle with the features of claim 1. The friction motor spindle comprises a storage unit for a spindle, namely friction spindle, provided bearing unit, which includes two axially spaced rolling bearings, and provided for direct drive of the spindle, no own storage having electric motor. With the spindle, a transmission element which is provided as part of a belt transmission, rotatably connected, wherein the electric motor of the bearing unit is immediately adjacent.

Gemäß einer ersten Variante ist der Elektromotor axial zwischen dem Getriebeelement und der Lagereinheit angeordnet. Gemäß einer zweiten Variante ist der Elektromotor auf der dem Getriebelement abgewandten Seite der Lagereinheit angeordnet.According to a first variant, the electric motor is arranged axially between the gear element and the bearing unit. According to a second variant of the electric motor is arranged on the side facing away from the transmission element of the bearing unit.

Im Gegensatz zu der aus der EP 0 828 872 B1 bekannten Anordnung ist bei der erfindungsgemäßen Motorspindel somit in jeder Variante der Elektromotor besonders nah an der Lagereinheit angeordnet, wobei gemäß der ersten Variante der Elektromotor näher als das Getriebeelement, beispielsweise eine Zahnriemenscheibe, ein Zahnrad ober ein reibschlüssig arbeitendes Getriebeelement, insbesondere eines Umschlingungsgetriebes, an der Lagereinheit angeordnet ist. Bei beiden Varianten hat sich herausgestellt, dass in besonders geringem Maße Schwingungen in die Spindel eingebracht werden, wobei nahezu das theoretisch nochmals verbesserte Schwingungsverhalten, welches bei einem zwischen den Wälzlagern der Lagereinheit angeordneten Elektromotor gegeben wäre, erreicht wird. Wesentlich relevanter als das theoretisch noch optimierbare Schwingungsverhalten ist jedoch die Tatsache, dass der Motor außerhalb der Lagereinheit, beispielsweise oberhalb oder unterhalb der Lagereinheit, angeordnet und somit ein montagefreundlicher Aufbau gegeben ist. Die Lagereinheit stellt vorzugsweise eine vormontierte Baueinheit mit zwei axial gegeneinander vorgespannten Lagern, insbesondere Kugellagern, dar.Unlike the one from the EP 0 828 872 B1 Known arrangement is thus arranged in the motor spindle according to the invention in each variant of the electric motor particularly close to the bearing unit, according to the first variant of the electric motor closer than the transmission element, such as a toothed belt pulley, a gear above a frictionally-operating transmission element, in particular a belt transmission, on the Storage unit is arranged. In both variants, it has been found that oscillations are introduced into the spindle to a particularly small extent, wherein virtually the theoretically even improved vibration behavior that would be present in an electric motor arranged between the roller bearings of the bearing unit is achieved. Much more relevant than the theoretically still optimizable vibration behavior, however, is the fact that the engine outside the storage unit, for example above or below the storage unit, arranged and thus a montage friendly structure is given. The bearing unit preferably represents a preassembled structural unit with two bearings axially preloaded against each other, in particular ball bearings.

Gemäß einer ersten Ausführungsform, die mit beiden Varianten - was die Anordnung des Elektromotors relativ zur Lagereinheit sowie zum Getriebeelement betrifft - kombinierbar ist, ist der Elektromotor als Außenläufer ausgebildet, wobei vorzugsweise dessen Rotor die Lagereinheit in Radialrichtung überragt. Diese Ausführungsform zeichnet sich durch ein hohes Drehmoment des elektrischen Direktantriebs aus. In besonders bevorzugter Ausgestaltung ist der zwischen dem Stator und dem Rotor des Elektromotors gebildete Luftspalt radial außerhalb der äußeren Wälzkörperlaufbahnen der Lagereinheit angeordnet. Die Angaben "axial" und "radial" beziehen sich stets auf die Rotationsachse des Elektromotors und damit der gesamten Friktions-Motorspindel.According to a first embodiment, which can be combined with both variants - with regard to the arrangement of the electric motor relative to the bearing unit and to the gear element - the electric motor is designed as an external rotor, wherein preferably its rotor projects beyond the bearing unit in the radial direction. This embodiment is characterized by a high torque of the electric direct drive. In a particularly preferred embodiment, the air gap formed between the stator and the rotor of the electric motor is arranged radially outside of the outer rolling body raceways of the bearing unit. The specifications "axial" and "radial" always refer to the axis of rotation of the electric motor and thus the entire friction motor spindle.

Gemäß einer zweiten Ausführungsform, welche ebenfalls mit beiden Varianten - betreffend die Anordnung des Elektromotors - kombinierbar ist, ist der Elektromotor als Innenläufer ausgebildet. In diesem Fall sind am Außenumfang des Elektromotors keine rotierenden Teile vorhanden.According to a second embodiment, which can also be combined with both variants-with regard to the arrangement of the electric motor-the electric motor is designed as an internal rotor. In this case, no rotating parts are present on the outer circumference of the electric motor.

Sowohl in der Ausführungsform als Innenläufer als auch in der Ausführungsform als Außenläufer kommen verschiedene Arten von Elektromotoren zum Antrieb der Spindel in Betracht: Im Fall eines Synchronmotors ist insbesondere ein mit Permanentmagneten bestückter Motor geeignet, wobei die Permanentmagnete vorzugsweise auf dem Rotor angeordnet sind, während der Stator bestrombare Spulen aufweist.Both in the embodiment as an internal rotor and in the embodiment as an external rotor, various types of electric motors for driving the spindle come into consideration: In the case of a synchronous motor, in particular a motor equipped with permanent magnets is suitable, the permanent magnets preferably being arranged on the rotor, while the Stator has energizable coils.

Der Synchronmotor der Friktions-Motorspindel kann entweder als Wechselstrommotor oder als Gleichstrommotor ausgebildet sein. Weiter sind als mögliche Motorbauarten ein Asynchronmotor sowie ein elektronisch kommutierter Gleichstrommotor zu nennen.The synchronous motor of the friction motor spindle can be designed either as an AC motor or as a DC motor. Further, as possible engine types an asynchronous motor and an electronically commutated DC motor can be mentioned.

Besonders hinsichtlich Robustheit, auch unter rauen Umgebungsbedingungen, und Herstellungsaufwand weist ein als Antrieb der Friktions-Motorspindel verwendbarer Reluktanzmotor, insbesondere ein geschalteter Reluktanzmotor oder ein Reluktanz-Schrittmotor, Vorteile auf. Ein solcher Motor weist keine Magnete auf. Insbesondere ein als Schrittmotor ausgebildeter Reluktanzmotor benötigt lediglich eine einfach aufgebaute Motoransteuerelektronik. Die im Vergleich zu permanentmagneterregten Synchronmotoren geringere Drehmomentdichte von Reluktanzmotoren ist in vielen Anwendungsfällen ausreichend.Particularly with regard to robustness, even under harsh environmental conditions, and production costs, a reluctance motor which can be used as drive of the friction motor spindle, in particular a switched reluctance motor or a reluctance stepping motor, has advantages. Such a motor has no magnets. In particular, a reluctance motor designed as a stepping motor only requires a simply constructed motor drive electronics. The lower torque density of reluctance motors compared to permanent magnet synchronous motors is sufficient in many applications.

Der Rotor des Elektromotors oder eine Komponente des Rotors des Elektromotors kann einstückig mit der Spindel ausgebildet sein. Ebenso kann der Rotor beispielsweise durch eine Press- oder Klebeverbindung drehfest mit der Spindel verbunden sein.The rotor of the electric motor or a component of the rotor of the electric motor may be formed integrally with the spindle. Likewise, the rotor may be rotatably connected to the spindle, for example, by a press or adhesive connection.

Je nach Motorbauart und gewünschten Steuerungseigenschaften kann der elektrische Direktantrieb, das heißt getriebelose elektrische Antrieb, eine sensorlose Vektorregelung, eine U/f-Steuerung oder eine Regelung über einen an den Elektromotor angebauten oder in diesen eingebauten Drehwinkelstellungsgeber aufweisen.Depending on the type of engine and the desired control characteristics, the electric direct drive, that is, gearless electric drive, sensorless vector control, a U / f control or control via a mounted on the electric motor or built-in rotation angle position transmitter.

Nachfolgend werden drei Ausführungsbeispiele der Erfindung anhand einer Zeichnung näher erläutert. Hierin zeigen:Hereinafter, three embodiments of the invention will be explained in more detail with reference to a drawing. Herein show:

Kurze Beschreibung der ZeichnungShort description of the drawing

Fig. 1Fig. 1
eine Friktions-Motorspindel mit einem als Außenläufer ausgebil- deten elektrischen Direktantrieb,a friction motor spindle with an electric external drive designed as an external rotor,
Fig. 2Fig. 2
eine Friktions-Motorspindel mit einem als Innenläufer ausgebilde- ten elektrischen Direktantrieb.a friction motor spindle with a direct drive designed as an internal rotor.
Fig.3Figure 3
eine weitere Friktions-Motorspindel mit einem als Innenläufer ausgebildeten elektrischen Direktantrieb.another friction motor spindle with an internal rotor designed as direct electrical drive.
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Einander entsprechende oder gleichwirkende Teile sind in allen Figuren mit den gleichen Bezugszeichen gekennzeichnet. Die folgenden Ausführungen beziehen sich, soweit nicht anders erwähnt, auf alle Ausführungsformen.Corresponding or equivalent parts are identified in all figures with the same reference numerals. The following statements relate, unless otherwise stated, to all embodiments.

Eine insgesamt mit dem Bezugszeichen 1 gekennzeichnete Friktions-Motorspindel ist zum Einbau in ein Friktionsfalschdrallaggregat vorgesehen, hinsichtlich dessen prinzipieller Funktion auf den eingangs genannten Stand der Technik sowie auf die DE 10 2005 023 928 A1 verwiesen wird.A designated generally by the reference numeral 1 friction motor spindle is intended for installation in a friction false-twist unit, with respect to its principal function on the above-mentioned prior art and on the DE 10 2005 023 928 A1 is referenced.

Die Friktions-Motorspindel 1 umfasst einen Elektromotor 2, welcher zum direkten Antrieb einer Spindel 3, welche nicht dargestellte Friktionsscheiben trägt, vorgesehen ist. Die Lagerung der Spindel 3 sowie des Elektromotors 2 erfolgt mittels einer Lagereinheit 4, die zwei Wälzlager 5, nämlich axial gegeneinander vorgespannte Kugellager, umfasst und in den Ausführungsbeispielen nach den Figuren 1 und 2 axial zwischen dem Elektromotor 2 und einnem zum Tragen der Friktionsscheiben vorgesehenen Abschnitt 6 der Spindel 3 angeordnet ist. Im Ausführungsbeispiel nach Fig. 3 dagegen ist der Elektromotor 2 zwischen der Lagereinheit 4 und dem Abschnitt 6 der Spindel 3 angeordnet.The friction motor spindle 1 comprises an electric motor 2 which is provided for the direct drive of a spindle 3, which carries not shown friction discs. The bearing of the spindle 3 and the electric motor 2 by means of a bearing unit 4, the two rolling bearings 5, namely axially against each other preloaded ball bearings, and in the embodiments of the Figures 1 and 2 is arranged axially between the electric motor 2 and a nnem for supporting the friction discs provided section 6 of the spindle 3. In the embodiment according to Fig. 3 By contrast, the electric motor 2 is arranged between the bearing unit 4 and the section 6 of the spindle 3.

Auf der der Lagereinheit 4 abgewandten Seite des Elektromotors 2 schließt sich in der Anordnung nach Fig. 1 sowie in der Anordnung nach Fig. 2 an den Elektromotor 2 ein als Teil eines Umschlingungsgetriebes fungierendes Getriebeelement 7, nämlich eine Zahnriemenscheibe, an. In der Anordnung nach Fig. 3 ist das Getriebeelement 7 der Lagereinheit 4 unmittelbar benachbart. In allen Fällen ist die Zahnriemenscheibe 7 oder ein sonstiges rotierbares Getriebeelement, beispielsweise ein Zahnrad, prinzipiell ebenso wie der Elektromotor 2 zum rotativen Antrieb der Spindel 3 geeignet. Vorzugsweise wird die Zahnriemenscheibe 7 beziehungsweise das sonstige Getriebeelement jedoch als Abtriebselement verwendet. Im Fall einer Zahnriemenscheibe 7 als Getriebeelement werden über einen nicht dargestellten Zahnriemen zwei weitere, keinen eigenen elektrischen Antrieb aufweisende Friktionsspindeln innerhalb des Friktionsfalschdrallaggregats angetrieben.On the side facing away from the storage unit 4 of the electric motor 2 follows in the arrangement Fig. 1 and in the arrangement according to Fig. 2 to the electric motor 2 acting as part of a belt transmission gear element 7, namely a toothed belt pulley, to. In the arrangement according to Fig. 3 is the transmission element 7 of the storage unit 4 immediately adjacent. In all cases, the toothed belt pulley 7 or another rotatable gear element, such as a gear, in principle, as well as the electric motor 2 for rotary drive of the spindle 3 suitable. Preferably, the Timing belt pulley 7 or the other gear element, however, used as an output element. In the case of a toothed belt pulley 7 as a transmission element two further, not own electric drive having friction spindles are driven within the Friktionsfalschdrallaggregats via a timing belt, not shown.

Der ebenso wie das rotierbare Getriebeelement 7 ohne eigene Lagerung arbeitende Elektromotor 2 weist einen Stator 8 und einen Rotor 9 auf, wobei der Stator 8 über nicht dargestellte Leitungen mit Energie versorgbare elektrische Spulen 10 aufweist, während der Rotor 9 mit Permanentmagneten 11, insbesondere Seltenerdmagneten, bestückt ist. Zwischen dem Stator 8 und dem Rotor 9 ist ein Luftspalt 12 gebildet.The electric motor 2, which works as well as the rotatable gear element 7 without its own bearing, has a stator 8 and a rotor 9, wherein the stator 8 has electric coils 10 that can be supplied with energy via lines, not shown, while the rotor 9 has permanent magnets 11, in particular rare earth magnets, is equipped. Between the stator 8 and the rotor 9, an air gap 12 is formed.

Im Ausführungsbeispiel nach Fig. 1 ist der Rotor 9 als topfförmiger Außenrotor ausgebildet und an seiner zylindrischen Innenwandung mit den Permanentmagneten 11 bestückt. Der ringförmige Luftspalt 12 ist hierbei radial außerhalb des durch die Mittelpunkte der einzelnen Wälzkörper 13, nämlich Kugeln, eines Wälzlagers 5 beschriebenen Teilkreises angeordnet. In Fällen, in denen die beiden Wälzlager 5 der Lagereinheit 4 unterschiedliche Durchmesser aufweisen, gilt diese Relation für jedes der Wälzlager. Durch den großen Durchmesser des ringförmigen Luftspalts 12 ist auch ohne aufwendige Kühlung des Elektromotors 2 ein hohes Drehmoment erzeugbar, wobei durch die dünnwandige Bauweise des Rotors 9 insgesamt eine kompakte Form der Friktions-Motorspindel 1 gegeben bleibt. Die bestrombaren Spulen 12 sind über ein Zwischenstück 14, welches zwei hohlzylindrische Abschnitte unterschiedlichen Durchmessers aufweist und dem Stator 8 zuzurechnen ist, fest mit einem nicht rotierenden Mantel 15 der Lagereinheit 4 verbunden. Die zum Zwischenstück 14 konzentrische Spindel 3 ist ohne Kontakt zu dem Zwischenstück 14 durch dieses durchgesteckt und über eine nicht dargestellte Verdrehsicherungskontur mit einem scheibenförmigen Bodenabschnitt 16 des Rotors 9 sowie mit dem Getriebeelement 7 verbunden.In the embodiment according to Fig. 1 the rotor 9 is designed as a cup-shaped outer rotor and equipped on its cylindrical inner wall with the permanent magnet 11. In this case, the annular air gap 12 is arranged radially outside of the pitch circle described by the center points of the individual rolling bodies 13, namely balls, of a roller bearing 5. In cases where the two rolling bearings 5 of the bearing unit 4 have different diameters, this relation applies to each of the rolling bearings. Due to the large diameter of the annular air gap 12, a high torque can be generated even without costly cooling of the electric motor 2, whereby a compact form of the friction motor spindle 1 remains given by the thin-walled construction of the rotor 9. The energizable coils 12 are connected via an intermediate piece 14, which has two hollow cylindrical sections of different diameters and is attributable to the stator 8, fixedly connected to a non-rotating jacket 15 of the bearing unit 4. The concentric to the intermediate piece 14 spindle 3 is inserted through this without contact with the intermediate piece 14 and connected via a Verdrehsicherungskontur not shown with a disc-shaped bottom portion 16 of the rotor 9 and the transmission element 7.

In den Ausführungsbeispielen nach den Figuren 2 und 3 sind die Permanentmagnete 11 direkt auf die Spindel 3 aufgebracht, beispielsweise aufgeklebt, während der Stator 8 auch in diesem Fall mittels eines Zwischenstücks 14 an der Lagereinheit 4 befestigt ist. Eine Abdeckscheibe 17, welche fest mit dem Zwischenstück 14 verbunden oder einteilig mit diesem ausgebildet ist, schließt den Elektromotor 2 auf der der Lagereinheit 4 abgewandten Seite ab.In the embodiments of the FIGS. 2 and 3 the permanent magnets 11 are applied directly to the spindle 3, for example glued, while the stator 8 is fixed in this case by means of an intermediate piece 14 to the bearing unit 4. A cover plate 17, which is fixedly connected to the intermediate piece 14 or integrally formed therewith, closes off the electric motor 2 on the side facing away from the bearing unit 4.

In nicht dargestellter Weise können in allen Ausführungsbeispielen auf die Spindel 3 wirkende Dämpfungsmittel vorgesehen sein. Aufgrund der schwingungstechnisch günstigen Anordnung von Lagereinheit 4, Elektromotor 2 und Getriebeelement 7 ist jedoch in praktisch allen Anwendungsfällen auch ohne solche Dämpfungsmittel ein ausreichend schwingungsarmer Lauf der Spindel 3 gegeben.In a manner not shown may be provided in all embodiments of the spindle 3 acting damping means. Due to the vibrationally favorable arrangement of bearing unit 4, electric motor 2 and gear element 7, however, a sufficiently low-vibration running of the spindle 3 is given in virtually all applications even without such damping means.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Friktions-MotorspindelFriction motor spindle
22
Elektromotorelectric motor
33
Spindelspindle
44
Lagereinheitstorage unit
55
Wälzlagerroller bearing
66
Abschnittsection
77
Getriebeelementgear element
88th
Statorstator
99
Rotorrotor
1010
SpuleKitchen sink
1111
Permanentmagnetpermanent magnet
1212
Luftspaltair gap
1313
Wälzkörperrolling elements
1414
Zwischenstückconnecting piece
1515
Mantelcoat
1616
Bodenabschnittbottom section
1717
Abdeckscheibecover plate

Claims (14)

Friktions-Motorspindel, mit einer zur Lagerung einer Spindel (3) vorgesehenen Lagereinheit (4), welche zwei axial voneinander beabstandete Wälzlager (5) umfasst, sowie mit einem zum Direktantrieb der Spindel (3) vorgesehenen, keine eigene Lagerung aufweisenden Elektromotor (2), und mit einem drehfest mit der Spindel (3) verbundenen, ein Teil eines Umschlingungsgetriebes bildenden Getriebelement (7), dadurch gekennzeichnet, dass der Elektromotor (2) der Lagereinheit (4) unmittelbar benachbart ist.Friction motor spindle, with a storage unit for a spindle (3) provided bearing unit (4), which comprises two axially spaced rolling bearings (5), and with a direct drive to the spindle (3) provided, not own storage having electric motor (2) , And with a rotatably connected to the spindle (3), forming part of a belt transmission gear element (7), characterized in that the electric motor (2) of the bearing unit (4) is immediately adjacent. Friktions-Motorspindel nach Anspruch 1, dadurch gekennzeichnet, dass der Elektromotor (2) axial zwischen dem Getriebelement (7) und der Lagereinheit (4) angeordnet ist.Friction motor spindle according to claim 1, characterized in that the electric motor (2) is arranged axially between the gear element (7) and the bearing unit (4). Friktions-Motorspindel nach Anspruch 1, dadurch gekennzeichnet, dass die Lagereinheit (4) axial zwischen dem Elektromotor (2) und dem Getriebelement (7) angeordnet ist.Friction motor spindle according to claim 1, characterized in that the bearing unit (4) is arranged axially between the electric motor (2) and the gear element (7). Friktions-Motorspindel nach Anspruch 1, dadurch gekennzeichnet, dass der Elektromotor (2) als Außenläufer ausgebildet ist.Friction motor spindle according to claim 1, characterized in that the electric motor (2) is designed as an external rotor. Friktions-Motorspindel nach Anspruch 4, dadurch gekennzeichnet, dass der Elektromotor (2) einen Rotor (9) aufweist, welcher die Lagereinheit (4) in Radialrichtung überragt.Friction motor spindle according to claim 4, characterized in that the electric motor (2) has a rotor (9) which projects beyond the bearing unit (4) in the radial direction. Friktions-Motorspindel nach Anspruch 1, dadurch gekennzeichnet, dass der Elektromotor (2) als Innenläufer ausgebildet ist.Friction motor spindle according to claim 1, characterized in that the electric motor (2) is designed as an internal rotor. Friktions-Motorspindel nach Anspruch 4 oder 6, dadurch gekennzeichnet, dass als Elektromotor (2) ein Synchronmotor vorgesehen ist.Friction motor spindle according to claim 4 or 6, characterized in that a synchronous motor is provided as the electric motor (2). Friktions-Motorspindel nach Anspruch 7, dadurch gekennzeichnet, dass der Elektromotor (2) als permanentmagneterregter Motor ausgebildet ist.Friction motor spindle according to claim 7, characterized in that the electric motor (2) is designed as a permanent magnet excited motor. Friktions-Motorspindel nach Anspruch 4 oder 6, dadurch gekennzeichnet, dass als Elektromotor (2) ein elektronisch kommutierter Gleichstrommotor vorgesehen ist.Friction motor spindle according to claim 4 or 6, characterized in that as the electric motor (2) an electronically commutated DC motor is provided. Friktions-Motorspindel nach Anspruch 4 oder 6, dadurch gekennzeichnet, dass als Elektromotor (2) ein Asynchronmotor vorgesehen ist.Friction motor spindle according to claim 4 or 6, characterized in that an asynchronous motor is provided as the electric motor (2). Friktions-Motorspindel nach Anspruch 4 oder 6, dadurch gekennzeichnet, dass als Elektromotor (2) ein Reluktanzmotor vorgesehen ist.Friction motor spindle according to claim 4 or 6, characterized in that a reluctance motor is provided as the electric motor (2). Friktions-Motorspindel nach Anspruch 11, dadurch gekennzeichnet, dass der Elektromotor (2) als Reluktanz-Schrittmotor ausgebildet ist.Friction motor spindle according to claim 11, characterized in that the electric motor (2) is designed as a reluctance stepper motor. Friktions-Motorspindel nach Anspruch 1, dadurch gekennzeichnet, dass als Getriebelement (7) eine Zahnriemenscheibe vorgesehen ist.Friction motor spindle according to claim 1, characterized in that a toothed belt pulley is provided as the gear element (7). Friktions-Motorspindel nach Anspruch 1, dadurch gekennzeichnet, dass als Wälzlager (5) axial gegeneinander vorgespannte Kugellager vorgesehen sind.Friction motor spindle according to claim 1, characterized in that as a rolling bearing (5) axially against each other preloaded ball bearings are provided.
EP10171587A 2009-09-09 2010-08-02 Friction motor spindle Not-in-force EP2295621B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009040864A DE102009040864A1 (en) 2009-09-09 2009-09-09 Friction motor spindle

Publications (2)

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EP2295621A1 true EP2295621A1 (en) 2011-03-16
EP2295621B1 EP2295621B1 (en) 2011-11-02

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ID=43304657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10171587A Not-in-force EP2295621B1 (en) 2009-09-09 2010-08-02 Friction motor spindle

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EP (1) EP2295621B1 (en)
CN (1) CN102021700B (en)
AT (1) ATE531840T1 (en)
DE (1) DE102009040864A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016525173A (en) * 2013-07-19 2016-08-22 シェフラー テクノロジーズ アー・ゲー ウント コー． カー・ゲーＳｃｈａｅｆｆｌｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓ ＡＧ ＆ Ｃｏ． ＫＧ False twister and false twister
JP2016529407A (en) * 2013-07-19 2016-09-23 シェフラー テクノロジーズ アー・ゲー ウント コー． カー・ゲーＳｃｈａｅｆｆｌｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓ ＡＧ ＆ Ｃｏ． ＫＧ False twister and false twister

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011080416A1 (en) * 2011-08-04 2013-02-07 Schaeffler Technologies AG & Co. KG Friction motor spindle and method of operation

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DE3743708A1 (en) * 1987-12-23 1989-07-06 Kugelfischer G Schaefer & Co FALSE TWIST TEXTURING UNIT WITH ELECTROMOTORIC DRIVE
EP0828872B1 (en) 1995-06-01 1999-07-07 INA Wälzlager Schaeffler oHG Drive for friction spindle units
DE102005023928A1 (en) 2005-05-24 2006-11-30 Schaeffler Kg Friktionsfalschdrallaggregat

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CN1052517C (en) * 1995-06-01 2000-05-17 Ina滚柱轴承制造两合公司 Drive for friction spindle units
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WO2000034558A1 (en) * 1998-12-07 2000-06-15 Teijin Seiki Co., Ltd. Motor-driven three-axis friction false twisting device

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Publication number Priority date Publication date Assignee Title
DE3743708A1 (en) * 1987-12-23 1989-07-06 Kugelfischer G Schaefer & Co FALSE TWIST TEXTURING UNIT WITH ELECTROMOTORIC DRIVE
EP0828872B1 (en) 1995-06-01 1999-07-07 INA Wälzlager Schaeffler oHG Drive for friction spindle units
DE102005023928A1 (en) 2005-05-24 2006-11-30 Schaeffler Kg Friktionsfalschdrallaggregat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016525173A (en) * 2013-07-19 2016-08-22 シェフラー テクノロジーズ アー・ゲー ウント コー． カー・ゲーＳｃｈａｅｆｆｌｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓ ＡＧ ＆ Ｃｏ． ＫＧ False twister and false twister
JP2016529407A (en) * 2013-07-19 2016-09-23 シェフラー テクノロジーズ アー・ゲー ウント コー． カー・ゲーＳｃｈａｅｆｆｌｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓ ＡＧ ＆ Ｃｏ． ＫＧ False twister and false twister
EP3031963A4 (en) * 2013-07-19 2017-03-22 Schaeffler Technologies AG & Co. KG False twister spindle and false twister

Also Published As

Publication number Publication date
ATE531840T1 (en) 2011-11-15
EP2295621B1 (en) 2011-11-02
CN102021700B (en) 2014-11-19
DE102009040864A1 (en) 2011-03-10
CN102021700A (en) 2011-04-20

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