EP2657379B1 - Open-end spinning rotor - Google Patents

Open-end spinning rotor Download PDF

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Publication number
EP2657379B1
EP2657379B1 EP13001318.8A EP13001318A EP2657379B1 EP 2657379 B1 EP2657379 B1 EP 2657379B1 EP 13001318 A EP13001318 A EP 13001318A EP 2657379 B1 EP2657379 B1 EP 2657379B1
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EP
European Patent Office
Prior art keywords
rotor
open
end spinning
shaft
cup
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EP13001318.8A
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German (de)
French (fr)
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EP2657379A2 (en
EP2657379A3 (en
Inventor
Heinz-Georg Wassenhoven
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Saurer Spinning Solutions GmbH and Co KG
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Saurer Germany GmbH and Co KG
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Publication of EP2657379A2 publication Critical patent/EP2657379A2/en
Publication of EP2657379A3 publication Critical patent/EP2657379A3/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/12—Rotor bearings; Arrangements for driving or stopping
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors

Definitions

  • the present invention relates to an open-end spinning rotor, comprising a rotor shaft, a rotor cup and a coupling device for releasably connecting the rotor shaft and rotor cup, the coupling device having arranged in a holding element locking body, which in operation of the open-end spinning rotor due to the centrifugal force, the rotor cup and lock the rotor shaft in the axial direction, wherein the locking bodies is associated with an elastic element and the elastic element cooperates with the locking bodies such that the locking body lock the rotor cup with the rotor shaft even at a standstill in the axial direction and wherein the holding element is designed as a pin and the Pin is shaped so that it produces a positive shaft-hub connection between the rotor shaft and rotor cup in conjunction with a correspondingly shaped hub.
  • open-end rotor spinning machines used in the textile industry were usually designed so that the spinning rotors with their rotor shafts were mounted in the bearing gussets of a so-called support disk bearing and were driven by a machine-tangential belt.
  • spinning rotors in which the rotor shaft and the rotor cup are usually connected almost inextricably by means of a press fit, can be installed or removed from the front through the opened rotor housing if necessary, for example during wear or to manufacture another type of yarn on the rotor spinning machine become.
  • single-motor driven spinning rotors are becoming increasingly important.
  • Such a single-motor driven spinning rotor is for example from the EP 0 972 868 A2 known.
  • the disclosed spinning rotor is supported with its rotor shaft in a magnetic bearing arrangement.
  • the magnetic bearing assembly consists of a front and a rear bearing, these bearings in turn each have axially opposed permanent magnet rings.
  • One of these permanent magnet rings is in each case fixed on the stator, while the other permanent magnet ring rotates with the rotor shaft.
  • the rotor cup is in each case releasably connected to the rotor shaft in these spinning rotors.
  • a coupling device which consists of a magnetic bearing for axial locking of the rotor shaft and rotor cup and a mechanical anti-rotation, which prevents any relative rotational movement between the rotor shaft and rotor cup via positive engagement exists.
  • a receiving sleeve is inserted by means of a press fit.
  • a permanent magnet and a polygonal socket are inserted in the axial direction one behind the other.
  • the rotor cup has a stub axle with an outer polygon, which corresponds to the polygonal socket.
  • shaft-hub connections Types of connections that transmit torques and power from a rotating shaft or spigot to a hub or vice versa from a rotating hub to a shaft or spigot are referred to in the art as shaft-hub connections.
  • the internal polygon forms in conjunction with the external polygon a positive shaft-hub connection.
  • the DE 38 15 182 A1 discloses various examples in which the coupling in the axial direction as well as the torque transmission from the rotor shaft to the rotor cup is realized either by a frictional or a positive connection.
  • the rotor cup is provided on the outer region of its bottom with connecting pins which are introduced into two axially parallel bores of a coupling disk fastened to the rotor shaft.
  • a coupling disk fastened to the rotor shaft For axial fixation, inter alia, a wavy curved spring steel strip or an S-shaped elastic locking element are proposed. Both parts deform under the influence of centrifugal forces and then engage in detents at the end of the connecting pin. At rest, rotor cup and rotor shaft are not axially locked. Presumably for this reason, the connecting pins are formed relatively long to prevent falling out of the rotor cup at rest under the influence of gravity. The long connecting pins are rather unfavorable for handling.
  • the generic EP 0 805 224 A2 discloses a coupling device between rotor cup and rotor shaft, which produces an exclusively non-positive connection both in the axial direction and for torque transmission. It is a centrifugal clutch with spherical locking bodies. When the spinning rotor is rotated, the centrifugal forces due to the design of the clutch provide for locking in the axial direction as well as in the direction of rotation.
  • the clutch also has an elastic element, the Example may be formed as a rubber block or as a spring element. The elastic element is arranged such that the locking bodies are pressed outwardly without rotational movement with respect to the axis of rotation of the spinning rotor. In this way, a lock is present even when the spinning rotor is at a standstill.
  • the locking bodies can be easily pushed together.
  • a disadvantage of this arrangement is that with increasing rotational speed of the spinning rotor, the purely non-positive transmission of the torque is no longer reliable. Therefore, the possibility is also described of designing the coupling as a non-rotationally symmetrical part, for example with a square cross-section, in order to simultaneously act as an anti-twist device.
  • the coupling should be formed with the locking body as a separate component.
  • the manufacturing tolerances add up according to the number of components, so that more components lead to greater inaccuracies and thus to a larger imbalance. At the high speeds with which spinning rotors are operated, this unbalance can lead to problems, up to the damage of the spinning unit.
  • the holding element with the locking bodies is firmly connected to the rotor shaft and the hub is formed as part of the rotor cup. Due to the arrangement of the holding element on the rotor shaft, the rotor cup, which is exchanged when needed, can be made particularly simple.
  • the invention realizes in a simple manner a positive connection for transmitting a torque from the rotor shaft to the rotor cup. As a result, the torque can be transmitted reliably even at higher speeds.
  • the inventive shape of the holding element for the locking body a compact and space-saving arrangement is created. A separate axle element is not required for the positive connection.
  • the arrangement according to the invention has few individual parts. Thereby, a summation of manufacturing tolerances can be reduced, so that the spinning rotor has a small imbalance.
  • the positive connection can be achieved for example by a splined shaft profile, a polygonal profile or a serration.
  • a simple but effective form for the positive connection is a circular cylindrical shape with at least one flat surface on the circumference.
  • the hub has receptacles that at least partially receive the locking bodies in the assembled state.
  • the centrifugal force acting in the radial direction initially causes a frictional locking in the axial direction.
  • the receptacle may be formed, for example, as a V-shaped groove.
  • the groove is present in the region of the locking body.
  • the groove is advantageously formed circumferentially along the circumference of the hub.
  • the receptacles each have a surface against which the locking body press
  • the rotor shaft and the rotor cup each have a stop for limiting an axial movement
  • the receptacles and the surface are formed so that the force acting in the radial direction the locking body is converted into a force in the axial direction of the open-end spinning rotor and thereby the stops of the rotor shaft and the rotor cup are pressed against each other.
  • the receptacles are formed as a V-shaped groove, this effect can be achieved by an asymmetrical structure of the groove.
  • the groove is designed so that the locking body press only against one of the inclined surfaces and so the radial force is converted into an axial force. If stops of rotor cup and rotor shaft are pressed against each other by the axial force, you get an optimal locking in the axial direction.
  • the stops have stop surfaces.
  • the abutment surfaces are preferably arranged perpendicular to the axis of the open-end spinning rotor and their geometric center of gravity is on the axis of the open-end spinning rotor.
  • the attacks is additionally achieved by the axial force against the attacks a centering of the rotor cup. That is, an angular offset between the axis of the rotor shaft and the axis of the rotor cup is avoided.
  • centrifugal clutches of the type claimed spherical locking body are particularly advantageous.
  • a spherical locking body works particularly effectively in conjunction with a V-shaped groove on the hub.
  • the spherical one Locking body lies against an inclined surface of the groove, so that the centrifugal force is converted into an axial force.
  • the spinning rotor comprises a rotor cup for an open-end spinning rotor having a hub, wherein the hub is shaped so that it results in a positive shaft-hub connection in conjunction with a correspondingly shaped journal of a rotor shaft, wherein the hub has receptacles on its inner circumference which are adapted to at least partially receive locking bodies connected to a rotor shaft, the seats having a surface formed such that a force exerting a locking body on the surface in the radial direction into a force in the axial direction of the rotor cup is converted.
  • the rotor cup has stops with stop surfaces which are arranged perpendicular to the axis of the rotor cup and whose geometric center of gravity is located on the axis of the rotor cup.
  • the spinning rotor 1 comprises a rotor shaft 4 and a rotor cup 2.
  • the rotor shaft 4 and the rotor cup 2 are releasably connected to each other, so that the rotor cup 2 can be replaced if necessary.
  • the rotor shaft 4 is connected to a drive, not shown. Since the rotor cup 2 is interchangeable, the rotor shaft 4 can be firmly integrated in the drive, preferably a single drive.
  • the spinning rotor 1 has a coupling device 3.
  • the rotor shaft 4 comprises a pin 5 and the rotor cup 2 a hub 8.
  • the outer shape of the pin 5 and the inner shape of the hub 8 are mutually corresponding, so that when plugging the rotor cup 2 on the pin 5 of the rotor shaft 4 a positive shaft-hub connection results and thus a torque can be transmitted.
  • the in the Figures 1 and 2 embodiment shown has a pin 5 with a circular cylindrical outer shape. To one achieve positive connection, the circular cylinder has two flat surfaces on its circumference.
  • the FIGS. 3 to 5 show exemplary alternative forms for a positive rotation between pin 5 and hub 8.
  • the Fig. 3 shows splined shaft profiles.
  • the Fig. 4 represents polygon profiles.
  • the Fig. 5 shows forms with a serration.
  • the pin 5 is simultaneously formed as a holding element for the locking body 6.
  • 6 two balls are available as a locking body.
  • an elastic element 7 is arranged, which presses the balls 6 also in the idle state of the spinning rotor to the outside.
  • the elastic element 7 may be formed, for example, as a rubber block or as a spring.
  • two balls 6 there is a simple structure.
  • the two balls 6 can be introduced with the elastic element in a transverse bore of the pin 5. By a so-called embossing creates a small bead at the ends of the transverse bore. By this embossment, the balls 6 are held with the elastic element 7 in the transverse bore.
  • the balls 6 are pressed into the receptacles 9 of the hub 8 of the rotor cup 2.
  • the receptacles 9 are formed as a V-shaped circumferential groove in the hub.
  • the Fig. 6 shows a part of the Fig. 2 and illustrates the operation of a possible axial locking.
  • the arrangement is designed such that the ball 6 only presses against the surface 12 facing the rotor shaft 4.
  • the centrifugal force or the force of the elastic element 7 is converted into an axial force.
  • the axial force is directed so that the stop 11 of the rotor cup 2 is pressed against the stop 10 of the rotor shaft 4.
  • the stops 10 and 11 are arranged rotationally symmetrical.
  • the geometric center of gravity of the abutment surfaces is thus on the axis of rotation of the open-end spinning rotor 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die vorliegende Erfindung betrifft einen Offenend-Spinnrotor, umfassend einen Rotorschaft, eine Rotortasse und eine Kupplungsvorrichtung zum lösbaren Verbinden von Rotorschaft und Rotortasse, wobei die Kupplungsvorrichtung in einem Halteelement angeordnete Verriegelungskörper aufweist, die bei Betrieb des Offenend-Spinnrotors in Folge der Zentrifugalkraft die Rotortasse und den Rotorschaft in axialer Richtung arretieren, wobei den Verriegelungskörpern ein elastisches Element zugeordnet ist und das elastische Element mit den Verriegelungskörpern derart zusammenwirkt, dass die Verriegelungskörper die Rotortasse mit dem Rotorschaft auch im Stillstand in axialer Richtung arretieren und wobei das Halteelement als Zapfen ausgebildet ist und der Zapfen so geformt ist, dass er in Verbindung mit einer entsprechend geformten Nabe eine formschlüssige Welle-Nabe-Verbindung zwischen Rotorschaft und Rotortasse herstellt.The present invention relates to an open-end spinning rotor, comprising a rotor shaft, a rotor cup and a coupling device for releasably connecting the rotor shaft and rotor cup, the coupling device having arranged in a holding element locking body, which in operation of the open-end spinning rotor due to the centrifugal force, the rotor cup and lock the rotor shaft in the axial direction, wherein the locking bodies is associated with an elastic element and the elastic element cooperates with the locking bodies such that the locking body lock the rotor cup with the rotor shaft even at a standstill in the axial direction and wherein the holding element is designed as a pin and the Pin is shaped so that it produces a positive shaft-hub connection between the rotor shaft and rotor cup in conjunction with a correspondingly shaped hub.

In der Vergangenheit waren in der Textilindustrie eingesetzte Offenend-Rotorspinnmaschinen meistens so gestaltet, dass die Spinnrotoren mit ihrem Rotorschaft in den Lagerzwickeln einer sogenannten Stützscheibenlagerung gelagert waren und dabei über einen maschinenlangen Tangentialriemen angetrieben wurden.In the past, open-end rotor spinning machines used in the textile industry were usually designed so that the spinning rotors with their rotor shafts were mounted in the bearing gussets of a so-called support disk bearing and were driven by a machine-tangential belt.

Diese Spinnrotoren, bei denen der Rotorschaft und die Rotortasse üblicherweise über einen Preßsitz nahezu unlösbar verbunden sind, können bei Bedarf, zum Beispiel bei Verschleiß oder, um einen anderen Garntyp auf der Rotorspinnmaschine zu fertigen, von vorne durch das geöffnete Rotorgehäuse ein- bzw. ausgebaut werden.These spinning rotors, in which the rotor shaft and the rotor cup are usually connected almost inextricably by means of a press fit, can be installed or removed from the front through the opened rotor housing if necessary, for example during wear or to manufacture another type of yarn on the rotor spinning machine become.

In der Gegenwart gewinnen einzelmotorisch angetriebene Spinnrotoren zunehmend an Bedeutung. Ein solcher einzelmotorisch angetriebener Spinnrotor ist beispielsweise aus der EP 0 972 868 A2 bekannt. Der offenbarte Spinnrotor ist mit seinem Rotorschaft in einer Magnetlageranordnung abgestützt.In the present, single-motor driven spinning rotors are becoming increasingly important. Such a single-motor driven spinning rotor is for example from the EP 0 972 868 A2 known. The disclosed spinning rotor is supported with its rotor shaft in a magnetic bearing arrangement.

Die Magnetlageranordnung besteht dabei aus einer vorderen und einer hinteren Lagerstelle, wobei diese Lagerstellen ihrerseits jeweils über sich axial gegenüberstehende Permanentmagnetringe verfügen. Einer dieser Permanentmagnetringe ist dabei jeweils am Stator festgelegt, während der andere Permanentmagnetring mit dem Rotorschaft umläuft.The magnetic bearing assembly consists of a front and a rear bearing, these bearings in turn each have axially opposed permanent magnet rings. One of these permanent magnet rings is in each case fixed on the stator, while the other permanent magnet ring rotates with the rotor shaft.

Da der Ein- oder Ausbau derartig gelagerter Spinnrotoren einen nicht unerheblichen Montageaufwand erfordert, ist bei diesen Spinnrotoren die Rotortasse jeweils lösbar mit dem Rotorschaft verbunden. Eine Möglichkeit einer solchen lösbaren Verbindung ist in der EP 1 156 142 B1 beschrieben. Diese wird mittels einer Kupplungsvorrichtung realisiert, die aus einer Magnetlagerung zur axialen Arretierung von Rotorschaft und Rotortasse und einer mechanischen Verdrehsicherung, die über Formschluss jede relative Rotationsbewegung zwischen Rotorschaft und Rotortasse verhindert, besteht. In den Rotorschaft ist eine Aufnahmehülse mittels einer Presspassung eingelassen. In der Aufnahmehülse sind in axialer Richtung hintereinander ein Permanentmagnet und ein Innenmehrkant eingelassen. Die Rotortasse weist einen Achsstummel mit einem Außenmehrkant auf, der mit dem Innenmehrkant korrespondiert.Since the installation or removal of such stored spinning rotors requires a considerable installation effort, the rotor cup is in each case releasably connected to the rotor shaft in these spinning rotors. One possibility of such a detachable connection is in the EP 1 156 142 B1 described. This is realized by means of a coupling device, which consists of a magnetic bearing for axial locking of the rotor shaft and rotor cup and a mechanical anti-rotation, which prevents any relative rotational movement between the rotor shaft and rotor cup via positive engagement exists. In the rotor shaft a receiving sleeve is inserted by means of a press fit. In the receiving sleeve, a permanent magnet and a polygonal socket are inserted in the axial direction one behind the other. The rotor cup has a stub axle with an outer polygon, which corresponds to the polygonal socket.

Verbindungsarten, die Drehmomente und Leistungen von einer rotierenden Welle oder einem rotierendem Zapfen auf eine Nabe oder umgekehrt von einer rotierenden Nabe auf eine Welle oder einen Zapfen übertragen, werden im Maschinenbau als Welle-Nabe-Verbindungen bezeichnet. Der Innenmehrkant bildet in Verbindung mit dem Außenmehrkant eine formschlüssige Welle-Nabe-Verbindung.Types of connections that transmit torques and power from a rotating shaft or spigot to a hub or vice versa from a rotating hub to a shaft or spigot are referred to in the art as shaft-hub connections. The internal polygon forms in conjunction with the external polygon a positive shaft-hub connection.

Es gab aber auch schon vor der Etablierung einzelmotorischer Rotorantriebe Bestrebungen, die Verbindung von Rotortasse und Rotorschaft lösbar auszubilden. Beispiele finden sich in der DE 38 15 182 A1 und in der DE 196 18 027 A1 .However, even before the establishment of single-motor rotor drives, efforts were made to detachably form the connection between the rotor cup and the rotor shaft. Examples can be found in the DE 38 15 182 A1 and in the DE 196 18 027 A1 ,

Die DE 38 15 182 A1 offenbart verschiedene Beispiele, bei denen die Kopplung in axialer Richtung als auch die Drehmomentübertragung von der Rotorwelle auf die Rotortasse entweder durch eine kraftschlüssige oder eine formschlüssige Verbindung realisiert wird. Zur Übertragung des Drehmomentes ist bei einem Ausführungsbeispiel die Rotortasse am Außenbereich ihres Bodens mit Verbindungszapfen versehen, die in zwei achsparallele Bohrungen einer an dem Rotorschaft befestigten Kupplungsscheibe eingeführt werden. Zur axialen Fixierung werden unter anderem ein wellenförmig gebogener Federstahlstreifen oder ein S-förmig ausgebildetes elastisches Verriegelungselement vorgeschlagen. Beide Teile verformen sich unter dem Einfluss von Fliehkräften und greifen dann in Rasten am Ende der Verbindungszapfen ein. Im Ruhezustand sind Rotortasse und Rotorschaft nicht axial arretiert. Vermutlich aus diesem Grunde sind die Verbindungszapfen relativ lang ausgebildet, um ein Herausfallen der Rotortasse im Ruhezustand unter Einfluss der Schwerkraft zu verhindern. Die langen Verbindungszapfen sind für die Handhabung eher ungünstig.The DE 38 15 182 A1 discloses various examples in which the coupling in the axial direction as well as the torque transmission from the rotor shaft to the rotor cup is realized either by a frictional or a positive connection. In order to transmit the torque, in one exemplary embodiment the rotor cup is provided on the outer region of its bottom with connecting pins which are introduced into two axially parallel bores of a coupling disk fastened to the rotor shaft. For axial fixation, inter alia, a wavy curved spring steel strip or an S-shaped elastic locking element are proposed. Both parts deform under the influence of centrifugal forces and then engage in detents at the end of the connecting pin. At rest, rotor cup and rotor shaft are not axially locked. Presumably for this reason, the connecting pins are formed relatively long to prevent falling out of the rotor cup at rest under the influence of gravity. The long connecting pins are rather unfavorable for handling.

Die gattungsgemäße EP 0 805 224 A2 offenbart eine Kupplungseinrichtung zwischen Rotortasse und Rotorschaft, die sowohl in axialer Richtung als auch zur Drehmomentübertragung eine ausschließlich kraftschlüssige Verbindung herstellt. Es handelt sich um eine Fliehkraftkupplung mit kugelförmigen Verriegelungskörpern. Wenn der Spinnrotor in Rotation versetzt wird, sorgen die Zentrifugalkräfte aufgrund der Konstruktion der Kupplung für eine Arretierung in axialer Richtung als auch in Drehrichtung. Die Kupplung weist zudem ein elastisches Element auf, das zum Beispiel als Gummiklotz oder als Federelement ausgebildet sein kann. Das elastische Element ist so angeordnet, dass die Verriegelungskörper auch ohne Rotationsbewegung in Bezug auf die Drehachse des Spinnrotors nach außen gedrückt werden. Auf diese Weise ist auch im Stillstand des Spinnrotors eine Arretierung vorhanden. Zum Verbinden von Spinntasse und Rotorschaft können die Verriegelungskörper leicht zusammengeschoben werden. Nachteilig an dieser Anordnung ist, dass bei zunehmender Drehzahl des Spinnrotors die rein kraftschlüssige Übertragung des Drehmomentes nicht mehr zuverlässig arbeitet. Deshalb wird auch die Möglichkeit beschrieben die Kupplung als nicht rotationssymmetrisches Teil auszugestalten, zum Beispiel mit einem quadratischen Querschnitt, um gleichzeitig als Verdrehsicherung zu wirken.The generic EP 0 805 224 A2 discloses a coupling device between rotor cup and rotor shaft, which produces an exclusively non-positive connection both in the axial direction and for torque transmission. It is a centrifugal clutch with spherical locking bodies. When the spinning rotor is rotated, the centrifugal forces due to the design of the clutch provide for locking in the axial direction as well as in the direction of rotation. The clutch also has an elastic element, the Example may be formed as a rubber block or as a spring element. The elastic element is arranged such that the locking bodies are pressed outwardly without rotational movement with respect to the axis of rotation of the spinning rotor. In this way, a lock is present even when the spinning rotor is at a standstill. For connecting the spinning cup and the rotor shaft, the locking bodies can be easily pushed together. A disadvantage of this arrangement is that with increasing rotational speed of the spinning rotor, the purely non-positive transmission of the torque is no longer reliable. Therefore, the possibility is also described of designing the coupling as a non-rotationally symmetrical part, for example with a square cross-section, in order to simultaneously act as an anti-twist device.

Gemäß der EP 0 805 224 A2 soll die Kupplung mit den Verriegelungskörper als separates Bauteil ausgebildet sein. Die Fertigungstoleranzen addieren sich entsprechend der Anzahl der Bauteile, so dass mehr Bauteile zu größeren Ungenauigkeiten führen und damit zu einer größeren Unwucht. Bei den hohen Drehzahlen mit denen Spinnrotoren betrieben werden, kann diese Unwucht zu Problemen führen, bis hin zur Beschädigung der Spinneinheit.According to the EP 0 805 224 A2 the coupling should be formed with the locking body as a separate component. The manufacturing tolerances add up according to the number of components, so that more components lead to greater inaccuracies and thus to a larger imbalance. At the high speeds with which spinning rotors are operated, this unbalance can lead to problems, up to the damage of the spinning unit.

Es ist die Aufgabe der vorliegenden Erfindung, ausgehend von der EP 0 805 224 A2 , einen Spinnrotor mit einer kompakten und zuverlässigen Kupplungsvorrichtung zur Verfügung zu stellen.It is the object of the present invention, starting from the EP 0 805 224 A2 to provide a spinning rotor with a compact and reliable coupling device.

Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved by the characterizing features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

Zur Lösung der Aufgabe ist das Halteelement mit den Verriegelungskörpern fest mit dem Rotorschaft verbunden und die Nabe ist als Teil der Rotortasse ausgebildet. Durch die Anordnung des Halteelementes auf dem Rotorschaft, kann die Rotortasse, die bei Bedarf ausgetauscht wird, besonders einfach gestaltet werden.To solve the problem, the holding element with the locking bodies is firmly connected to the rotor shaft and the hub is formed as part of the rotor cup. Due to the arrangement of the holding element on the rotor shaft, the rotor cup, which is exchanged when needed, can be made particularly simple.

Die Erfindung realisiert auf einfache Weise eine formschlüssige Verbindung zur Übertragung eines Drehmoments von dem Rotorschaft auf die Rotortasse. Dadurch kann das Drehmoment auch bei höheren Drehzahlen zuverlässig übertragen werden. Durch die erfindungsgemäße Form des Halteelementes für die Verriegelungskörper wird eine kompakte und platzsparende Anordnung geschaffen. Ein separates Achselement ist für die formschlüssige Verbindung nicht erforderlich. Die erfindungsgemäße Anordnung weist wenige Einzelteile auf. Dadurch kann eine Summierung von Fertigungstoleranzen reduziert werden, so dass der Spinnrotor eine geringe Unwucht aufweist.The invention realizes in a simple manner a positive connection for transmitting a torque from the rotor shaft to the rotor cup. As a result, the torque can be transmitted reliably even at higher speeds. The inventive shape of the holding element for the locking body a compact and space-saving arrangement is created. A separate axle element is not required for the positive connection. The arrangement according to the invention has few individual parts. Thereby, a summation of manufacturing tolerances can be reduced, so that the spinning rotor has a small imbalance.

Für die Form des als Zapfen ausgebildeten Halteelementes können an sich bekannte Formen für Welle-Nabe-Verbindungen verwendet werden. Die formschlüssige Verbindung kann zum Beispiel durch ein Keilwellenprofil, ein Polygonprofil oder eine Kerbverzahnung erreicht wird.For the shape of the holding element designed as a journal, forms known per se for shaft-hub connections can be used. The positive connection can be achieved for example by a splined shaft profile, a polygonal profile or a serration.

Eine einfache aber wirkungsvolle Form für die formschlüssige Verbindung ist eine kreiszylindrische Form mit mindestens einer ebenen Fläche auf dem Umfang.A simple but effective form for the positive connection is a circular cylindrical shape with at least one flat surface on the circumference.

Vorzugsweise weist die Nabe Aufnahmen auf, die in montiertem Zustand die Verriegelungskörper zumindest teilweise aufnehmen. Die in radialer Richtung wirkende Zentrifugalkraft bewirkt zunächst eine kraftschlüssige Arretierung in axialer Richtung. Durch die Aufnahme wird zusätzlich ein Formschluss erreicht, der die Arretierung in axialer Richtung verbessert. Die Aufnahme kann zum Beispiel als V-förmige Nut ausgebildet sein. Für die Funktion ist es ausreichend, wenn die Nut im Bereich der Verriegelungskörper vorhanden ist. Aus fertigungstechnischen Gründen ist die Nut allerdings vorteilhaferweise umlaufend entlang des Umfangs der Nabe ausgebildet.Preferably, the hub has receptacles that at least partially receive the locking bodies in the assembled state. The centrifugal force acting in the radial direction initially causes a frictional locking in the axial direction. By recording a positive connection is additionally achieved, which improves the locking in the axial direction. The receptacle may be formed, for example, as a V-shaped groove. For the function, it is sufficient if the groove is present in the region of the locking body. For manufacturing reasons, however, the groove is advantageously formed circumferentially along the circumference of the hub.

Vorteilhafterweise weisen die Aufnahmen jeweils eine Fläche auf, gegen die die Verriegelungskörper drücken, und der Rotorschaft und die Rotortasse weisen jeweils einen Anschlag zur Begrenzung einer axialen Bewegung auf, wobei die Aufnahmen und die Fläche so ausgebildet sind, dass die in radialer Richtung wirkende Kraft auf die Verriegelungskörper in eine Kraft in axialer Richtung des Offenend-Spinnrotors umgewandelt wird und dadurch die Anschläge von Rotorschaft und Rotortasse aneinander gedrückt werden.Advantageously, the receptacles each have a surface against which the locking body press, and the rotor shaft and the rotor cup each have a stop for limiting an axial movement, wherein the receptacles and the surface are formed so that the force acting in the radial direction the locking body is converted into a force in the axial direction of the open-end spinning rotor and thereby the stops of the rotor shaft and the rotor cup are pressed against each other.

Wenn die Aufnahmen als V-förmige Nut ausgebildet sind, kann diese Wirkungsweise durch einen unsymmetrischen Aufbau der Nut erreicht werden. Die Nut ist so gestaltet, dass die Verriegelungskörper nur gegen eine der schrägen Flächen drücken und so die radiale Kraft in eine axiale Kraft umgewandelt wird. Wenn durch die axiale Kraft Anschläge von Rotortasse und Rotorschaft gegeneinander gedrückt werden, erhält man eine optimale Arretierung in axialer Richtung.If the receptacles are formed as a V-shaped groove, this effect can be achieved by an asymmetrical structure of the groove. The groove is designed so that the locking body press only against one of the inclined surfaces and so the radial force is converted into an axial force. If stops of rotor cup and rotor shaft are pressed against each other by the axial force, you get an optimal locking in the axial direction.

Die Anschläge weisen Anschlagflächen auf. Die Anschlagflächen sind vorzugsweise senkrecht zur Achse des Offenend-Spinnrotors angeordnet und ihr geometrischer Schwerpunkt liegt auf der Achse des Offenend-Spinnrotors. Bei dieser Ausgestaltung der Anschläge wird durch die axiale Kraft gegen die Anschläge zusätzlich eine Zentrierung der Rotortasse erreicht. Das heißt, ein Winkelversatz zwischen der Achse des Rotorschaftes und der Achse der Rotortasse wird vermieden.The stops have stop surfaces. The abutment surfaces are preferably arranged perpendicular to the axis of the open-end spinning rotor and their geometric center of gravity is on the axis of the open-end spinning rotor. In this embodiment of the attacks is additionally achieved by the axial force against the attacks a centering of the rotor cup. That is, an angular offset between the axis of the rotor shaft and the axis of the rotor cup is avoided.

Für Fliehkraftkupplungen der beanspruchten Art sind kugelförmige Verriegelungskörper besonders vorteilhaft. Ein kugelförmiger Verriegelungskörper arbeitet besonders wirkungsvoll in Verbindung mit einer V-förmigen Nut an der Nabe. Der kugelförmige Verriegelungskörper legt sich an eine schräge Fläche der Nut, so dass die Zentrifugalkraft in eine axiale Kraft umgewandelt wird.For centrifugal clutches of the type claimed spherical locking body are particularly advantageous. A spherical locking body works particularly effectively in conjunction with a V-shaped groove on the hub. The spherical one Locking body lies against an inclined surface of the groove, so that the centrifugal force is converted into an axial force.

Der erfindungsgemäße Spinnrotor umfasst eine Rotortasse für einen Offenend-Spinnrotor mit einer Nabe, wobei die Nabe so geformt ist, dass sie in Verbindung mit einem entsprechend geformten Zapfen eines Rotorschaftes eine formschlüssige Welle-Nabe-Verbindung ergibt, wobei die Nabe an ihrem Innenumfang Aufnahmen aufweist, die dazu ausgebildet sind, mit einem Rotorschaft verbundene Verriegelungskörper zumindest teilweise aufzunehmen, wobei die Aufnahmen eine Fläche aufweisen, die so ausgebildet ist, dass eine Kraft, die ein Verriegelungskörper auf die Fläche in radialer Richtung ausübt, in eine Kraft in axialer Richtung der Rotortasse umgewandelt wird.The spinning rotor according to the invention comprises a rotor cup for an open-end spinning rotor having a hub, wherein the hub is shaped so that it results in a positive shaft-hub connection in conjunction with a correspondingly shaped journal of a rotor shaft, wherein the hub has receptacles on its inner circumference which are adapted to at least partially receive locking bodies connected to a rotor shaft, the seats having a surface formed such that a force exerting a locking body on the surface in the radial direction into a force in the axial direction of the rotor cup is converted.

Vorzugsweise weist die Rotortasse Anschläge mit Anschlagflächen auf, die senkrecht zur Achse der Rotortasse angeordnet sind und deren geometrischer Schwerpunkt auf der Achse der Rotortasse liegt.Preferably, the rotor cup has stops with stop surfaces which are arranged perpendicular to the axis of the rotor cup and whose geometric center of gravity is located on the axis of the rotor cup.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawings.

Es zeigen:

Fig. 1
einen erfindungsgemäßen Spinnrotor;
Fig. 2
den Spinnrotor aus Fig. 1 in einer geschnittenen Darstellung;
Fig. 3
mögliche Formen für eine formschlüssige Welle-Nabe-Verbindung durch Keilwellenprofile;
Fig. 4
mögliche Formen für eine formschlüssige Welle-Nabe-Verbindung durch Polygonprofile;
Fig. 5
mögliche Formen für eine formschlüssige Welle-Nabe-Verbindung durch Kerbverzahnung;
Fig. 6
einen Ausschnitt aus der Darstellung der Fig. 2.
Show it:
Fig. 1
a spinning rotor according to the invention;
Fig. 2
the spinning rotor off Fig. 1 in a sectional view;
Fig. 3
possible forms for a positive shaft-hub connection by spline profiles;
Fig. 4
possible forms for a positive shaft-hub connection by polygonal profiles;
Fig. 5
possible forms for a positive shaft-hub connection by serration;
Fig. 6
a section of the representation of Fig. 2 ,

Die Figuren 1 und 2 zeigen einen erfindungsgemäßen Spinnrotor 1. Der Spinnrotor 1 umfasst einen Rotorschaft 4 und eine Rotortasse 2. Der Rotorschaft 4 und die Rotortasse 2 sind lösbar miteinander verbunden, so dass die Rotortasse 2 bei Bedarf ausgetauscht werden kann. Der Rotorschaft 4 ist mit einem nicht dargestellten Antrieb verbunden. Da die Rotortasse 2 austauschbar ist, kann der Rotorschaft 4 fest in den Antrieb, vorzugsweise ein Einzelantrieb, integriert sein.The Figures 1 and 2 The spinning rotor 1 comprises a rotor shaft 4 and a rotor cup 2. The rotor shaft 4 and the rotor cup 2 are releasably connected to each other, so that the rotor cup 2 can be replaced if necessary. The rotor shaft 4 is connected to a drive, not shown. Since the rotor cup 2 is interchangeable, the rotor shaft 4 can be firmly integrated in the drive, preferably a single drive.

Um eine lösbare Verbindung zu realisieren, weist der Spinnrotor 1 eine Kupplungsvorrichtung 3 auf. In dem dargestellten Ausführungsbeispiel umfasst der Rotorschaft 4 einen Zapfen 5 und die Rotortasse 2 eine Nabe 8. Die Außenform des Zapfens 5 und die Innenform der Nabe 8 sind zueinander korrespondierend, so dass sich beim Aufstecken der Rotortasse 2 auf den Zapfen 5 des Rotorschaftes 4 eine formschlüssige Welle-Nabe-Verbindung ergibt und somit ein Drehmoment übertragen werden kann. Die in den Figuren 1 und 2 dargestellte Ausführungsform weist einen Zapfen 5 mit einer kreiszylindrischen Außenform auf. Um eine formschlüssige Verbindung zu erzielen, weist der Kreiszylinder zwei ebene Flächen an seinem Umfang auf. Die Figuren 3 bis 5 zeigen beispielhaft alternative Formen für eine formschlüssige Verdrehsicherung zwischen Zapfen 5 und Nabe 8. Die Fig. 3 zeigt Keilwellenprofile. Die Fig. 4 stellt Polygonprofile dar. Die Fig. 5 zeigt Formen mit einer Kerbverzahnung.In order to realize a detachable connection, the spinning rotor 1 has a coupling device 3. In the illustrated embodiment, the rotor shaft 4 comprises a pin 5 and the rotor cup 2 a hub 8. The outer shape of the pin 5 and the inner shape of the hub 8 are mutually corresponding, so that when plugging the rotor cup 2 on the pin 5 of the rotor shaft 4 a positive shaft-hub connection results and thus a torque can be transmitted. The in the Figures 1 and 2 embodiment shown has a pin 5 with a circular cylindrical outer shape. To one achieve positive connection, the circular cylinder has two flat surfaces on its circumference. The FIGS. 3 to 5 show exemplary alternative forms for a positive rotation between pin 5 and hub 8. The Fig. 3 shows splined shaft profiles. The Fig. 4 represents polygon profiles. The Fig. 5 shows forms with a serration.

Der Zapfen 5 ist gleichzeitig als Halteelement für die Verriegelungskörper 6 ausgebildet. In dem dargestellten Ausführungsbeispiel sind als Verriegelungskörper 6 zwei Kugeln vorhanden. Zwischen den Kugeln 6 ist ein elastisches Element 7 angeordnet, das die Kugeln 6 auch im Ruhezustand des Spinnrotors nach außen drückt. Das elastische Element 7 kann zum Beispiel als Gummiklotz oder als Feder ausgebildet sein. Bei Verwendung von zwei Verriegelungskörpern, im vorliegenden Ausführungsbeispiel zwei Kugeln 6, ergibt sich ein einfacher Aufbau. Die beiden Kugeln 6 können mit dem elastischen Element in eine Querbohrung des Zapfens 5 eingebracht werden. Durch eine sogenannte Prägung entsteht eine geringe Wulst an den Enden der Querbohrung. Durch diese Prägung werden die Kugeln 6 mit dem elastischen Element 7 in der Querbohrung gehalten. In eingebautem Zustand werden die Kugeln 6 in die Aufnahmen 9 der Nabe 8 der Rotortasse 2 gedrückt. Die Aufnahmen 9 sind als V-förmige umlaufende Nut in der Nabe ausgebildet. Beim Abziehen und Aufstecken der Rotortasse 2 können die Kräfte des elastischen Elementes 7 leicht überwunden werden. Wenn der Spinnrotor 1 in Rotation versetzt wird, wirken auf die Kugeln 6 Zentrifugalkräfte, so dass die Kugeln mit einer größeren Kraft in die Nut 9 gedrückt werden.The pin 5 is simultaneously formed as a holding element for the locking body 6. In the illustrated embodiment, 6 two balls are available as a locking body. Between the balls 6, an elastic element 7 is arranged, which presses the balls 6 also in the idle state of the spinning rotor to the outside. The elastic element 7 may be formed, for example, as a rubber block or as a spring. When using two locking bodies, in the present embodiment, two balls 6, there is a simple structure. The two balls 6 can be introduced with the elastic element in a transverse bore of the pin 5. By a so-called embossing creates a small bead at the ends of the transverse bore. By this embossment, the balls 6 are held with the elastic element 7 in the transverse bore. In the installed state, the balls 6 are pressed into the receptacles 9 of the hub 8 of the rotor cup 2. The receptacles 9 are formed as a V-shaped circumferential groove in the hub. When removing and attaching the rotor cup 2, the forces of the elastic element 7 can be easily overcome. When the spinning rotor 1 is rotated, centrifugal forces are applied to the balls 6, so that the balls are pressed into the groove 9 with a larger force.

Die Fig. 6 zeigt einen Ausschnitt aus der Fig. 2 und verdeutlicht die Wirkungsweise einer möglichen axialen Arretierung. In der vergrößerten Darstellung ist der unsymmetrische Aufbau der Nut 9 zu erkennen. Die Anordnung ist so ausgebildet, dass die Kugel 6 nur gegen die dem Rotorschaft 4 zugewandte Fläche 12 drückt. Dadurch wird die Zentrifugalkraft beziehungsweise die Kraft des elastischen Elementes 7 in eine Axialkraft umgewandelt. Die Axialkraft ist so gerichtet, dass der Anschlag 11 der Rotortasse 2 gegen den Anschlag 10 des Rotorschaftes 4 gedrückt wird. Die Anschläge 10 und 11 sind rotationssymmetrisch angeordnet. Der geometrischer Schwerpunkt der Anschlagsflächen liegt damit auf der Rotationachse des Offenend-Spinnrotors 1. Indem die Anschläge 10, 11 gegeneinander gedrückt werden, erfolgt damit nicht nur eine axiale Arretierung sondern auch eine Zentrierung der Rotortasse.The Fig. 6 shows a part of the Fig. 2 and illustrates the operation of a possible axial locking. In the enlarged view is the unbalanced structure of Groove 9 to recognize. The arrangement is designed such that the ball 6 only presses against the surface 12 facing the rotor shaft 4. As a result, the centrifugal force or the force of the elastic element 7 is converted into an axial force. The axial force is directed so that the stop 11 of the rotor cup 2 is pressed against the stop 10 of the rotor shaft 4. The stops 10 and 11 are arranged rotationally symmetrical. The geometric center of gravity of the abutment surfaces is thus on the axis of rotation of the open-end spinning rotor 1. By the stops 10, 11 are pressed against each other, thus takes place not only an axial locking but also a centering of the rotor cup.

Claims (9)

  1. Open-end spinning rotor (1), comprising a rotor shaft (4), a rotor cup (2) and a coupling device (3) for releasably connecting the rotor shaft (4) and rotor cup (2), wherein the coupling device (3) comprises locking bodies (6), which are arranged in a holding element (5) and lock the rotor cup (2) and the rotor shaft (4) in axial direction as a consequence of the centrifugal force during operation of the open-end spinning rotor (1), and wherein a resilient element (7) is associated with the locking bodies (6) and the resilient element (7) cooperates with the locking bodies (6) in such a way that the locking bodies (6) also lock the rotor cup (2) to the rotor shaft (4) in the axial direction at a standstill, the holding element (5) is configured as a pin and the pin is shaped in such a way that it produces a form-fitting shaft-hub connection between the rotor shaft (4) and rotor cup (2) in conjunction with a correspondingly formed hub (8), characterised in that the holding element (5) with the locking bodies (6) is securely connected to the rotor shaft (4) and the hub (8) is configured as part of the rotor cup (2).
  2. Open-end spinning rotor (1) according to claim 1, characterised in that the form-fitting connection is achieved by a spline shaft profile.
  3. Open-end spinning rotor (1) according to claim 1, characterised in that the form-fitting connection is achieved by a polygonal profile.
  4. Open-end spinning rotor (1) according to claim 1, characterised in that the form-fitting connection is achieved by a serration.
  5. Open-end spinning rotor (1) according to claim 1, characterised in that the form-fitting connection is achieved by a circular cylindrical shape having at least one level face on the periphery.
  6. Open-end spinning rotor (1) according to any of the preceding claims, characterised in that the hub (8) has mounts (9), which at least partly receive the locking bodies (6) in the assembled state.
  7. Open-end spinning rotor (1) according to claim 6, characterised in that the mounts (9) in each case have a face (12), against which the locking bodies (6) press, and in that the rotor shaft (4) and the rotor cup (2) in each case have a stop (10, 11) for limiting an axial movement, wherein the mounts (9) and the face (12) are configured in such a way that the force acting in the radial direction on the locking bodies (6) is converted into a force in the axial direction of the open-end spinning rotor (1) and the stops (10, 11) of the rotor shaft (4) and rotor cup (2) are thereby pressed against one another.
  8. Open-end spinning rotor (1) according to claim 7, characterised in that the stops (10, 11) have stop faces, which are arranged perpendicular to the axis of the open-end spinning rotor (1) and the geometric focal point of which is located on the axis of the open-end spinning rotor (1).
  9. Open-end spinning rotor (1) according to any of the preceding claims, characterised in that the locking bodies (6) are spherical.
EP13001318.8A 2012-04-28 2013-03-15 Open-end spinning rotor Active EP2657379B1 (en)

Applications Claiming Priority (1)

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DE102012008693A DE102012008693A1 (en) 2012-04-28 2012-04-28 Open-end spinning rotor

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EP2657379A3 EP2657379A3 (en) 2014-04-16
EP2657379B1 true EP2657379B1 (en) 2017-02-08

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US (1) US8875482B2 (en)
EP (1) EP2657379B1 (en)
CN (1) CN103374770B (en)
BR (1) BR102013010578B1 (en)
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DE102012022092A1 (en) 2012-11-10 2014-05-15 Saurer Germany Gmbh & Co. Kg Open-end spinning rotor
DE102013108199A1 (en) * 2013-07-31 2015-02-05 Maschinenfabrik Rieter Ag Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device
DE102014002102A1 (en) 2014-02-15 2015-08-20 Saurer Germany Gmbh & Co. Kg Open-end spinning rotor
DE102016108859A1 (en) * 2016-05-13 2017-11-16 Rieter Ingolstadt Gmbh Spinning rotor for an open-end spinning device with a friction-increasing coating and open-end spinning device
DE102016109509A1 (en) * 2016-05-24 2017-11-30 Rieter Ingolstadt Gmbh Rotor shaft for a non-contact mounted in a magnetic bearing assembly spinning rotor and spinning rotor
CN110306264B (en) * 2019-07-16 2021-07-27 济宁精忠纺织有限公司 Device convenient to high rotational speed spinning rotor free end installation is dismantled

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EP2657379A2 (en) 2013-10-30
BR102013010578A2 (en) 2015-12-08
US20130283754A1 (en) 2013-10-31
CN103374770A (en) 2013-10-30
DE102012008693A1 (en) 2013-10-31
BR102013010578B1 (en) 2021-04-13
CN103374770B (en) 2018-04-06
EP2657379A3 (en) 2014-04-16
US8875482B2 (en) 2014-11-04

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