EP2832903B1 - Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device - Google Patents

Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device Download PDF

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Publication number
EP2832903B1
EP2832903B1 EP14175954.8A EP14175954A EP2832903B1 EP 2832903 B1 EP2832903 B1 EP 2832903B1 EP 14175954 A EP14175954 A EP 14175954A EP 2832903 B1 EP2832903 B1 EP 2832903B1
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EP
European Patent Office
Prior art keywords
rotor
open
cup
projection
end spinning
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.)
Active
Application number
EP14175954.8A
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German (de)
French (fr)
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EP2832903A1 (en
Inventor
Bernd Loos
Hans Kustermann
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to EP16201925.1A priority Critical patent/EP3153611B1/en
Publication of EP2832903A1 publication Critical patent/EP2832903A1/en
Application granted granted Critical
Publication of EP2832903B1 publication Critical patent/EP2832903B1/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
    • D01H4/10—Rotors
    • 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

Definitions

  • the present invention relates to an open-end spinning rotor having a rotor cup, in which a fiber material is spinnable, and having a rotor shaft, via which the spinning rotor in a storage, in particular in a magnetic bearing, can be supported.
  • the rotor shaft and the rotor cup are releasably connected together via a coupling device.
  • the coupling device includes a positive connection for torque transmission between the rotor cup and the rotor shaft and a magnetic device for the axial connection of the rotor shaft and rotor cup.
  • the DE 38 15 182 A1 describes a spinning rotor with such a coupling arrangement.
  • the DE 38 15 182 A1 provides, at the end of the rotor shaft to arrange a coupling shell with a recess or sleeve, in which a correspondingly complementary trained pin, which is arranged at the back of the bottom of the rotor pot, engages.
  • the torque transmission from the rotor shaft to the rotor pot is to be done by a positive connection of the two coupling parts together.
  • According to a second embodiment may be provided instead of a large, central pin and a plurality of smaller pins which engage in recesses of the coupling shell.
  • To hold the rotor pot is a permanent magnet, which is inserted into the clutch disc on the rotor shaft.
  • the clutch assembly is relatively complex to produce and also relatively large and heavy, which is disadvantageous at today's high speeds.
  • the EP 1 156 142 B1 shows a spinning rotor, which is already provided for an open-end spinning device with a magnetic bearing assembly.
  • the coupling device includes a receiving sleeve arranged on the shaft of the spinning rotor, in which a hexagon socket is arranged.
  • a cylindrical guide projection is formed, which engages in the receiving sleeve of the rotor shaft.
  • an external hexagon is an external hexagon, which engages in the hexagon socket in the sleeve of the rotor shaft.
  • a permanent magnet is also disposed within the rotor shaft, which is to take over the axial securing of the coupling device.
  • the production of the spinning rotor with the additional guide projection and the additional receiving sleeve is also relatively expensive.
  • the EP 2 463 415 A2 shows a spinning rotor with a rotor shaft and a rotor cup, which are interconnected by a coupling device.
  • the spinning rotor includes a hole in the rotor cup and a corresponding cylindrical portion on the rotor shaft, the one inside the other to grab.
  • the coupling device includes a screw connection. The axial securing and torque transmission from the rotor shaft to the rotor cup thus takes place positively.
  • the EP 1 710 050 A2 shows a tool for holding and manually driving a screw bit.
  • the screw bit has at its end facing away from the screw tip a hexagon, which engages in a hexagon socket of a housing of the tool.
  • a plurality of magnets are provided in the housing of the tool.
  • Object of the present invention is to propose an open-end spinning rotor with a coupling device, which has a simple and easy to maintain in construction.
  • the coupling device includes a positive connection for torque transmission and a magnetic device for the axial connection of the rotor shaft and rotor cup. It is now provided to arrange the coupling device with its two coupling components directly to the rotor shaft or the rotor cup without the interposition of other components.
  • the assembly of the open-end spinning rotor is thereby particularly simple, since only two parts rotor shaft and rotor cup must be connected to each other and possibly even the permanent magnet must be used.
  • the open-end spinning rotor can therefore be used particularly advantageously in open-end spinning devices with high speeds of more than 130,000.
  • the rotor shaft has at least one projection with at least one torque-transmitting region, which engages in at least one corresponding recess of the rotor cup with at least one torque-transmitting counter region.
  • a receptacle for a permanent magnet is arranged at the rotor cup. The fact that the permanent magnet is arranged on the rotor cup, it is possible in a particularly simple and effective way to remove it after its lifetime and replace it with a new permanent magnet. A complex disassembly of the rotor shaft from the storage of the open-end spinning device is not required for this purpose.
  • the permanent magnet is particularly easily accessible and easily replaceable.
  • the permanent magnet is located on the wear part of the spinning rotor, namely the rotor cup, which must be replaced anyway after a certain time. It has been shown that such magnets often have a comparatively short life and therefore must be replaced. This is now easily possible by the arrangement of the permanent magnet on or in the easily replaceable rotor cup, since the magnet is easily accessible.
  • a particularly good accessibility and thus a particularly simple interchangeability of the permanent magnet results when it is arranged in the axial extension of the recess for the projection of the rotor shaft. At the same time, this results in a particularly good axial connection between the rotor shaft and the rotor cup.
  • a simple manufacture and easy installation of the open-end spinning rotor is made possible when the recording for the permanent magnet is formed by a hole in the rotor cup.
  • a hole in the rotor cup Preferably, such a bore is located in the bottom of the rotor cup, so that the permanent magnet can be easily introduced into the receptacle from the opening of the rotor cup.
  • one or more permanent magnets within the confederation of the rotor cup so that they are in the assembled spinning rotor next to the projection of the rotor shaft.
  • an annular permanent magnet may also be arranged in the collar of the rotor cup, which surrounds the projection of the rotor shaft when the spinning rotor is mounted.
  • the at least one projection of the rotor shaft at least at its the rotor cup end facing a cylindrical outer contour. In this way, a good centering of the rotor cup can be achieved to the rotor shaft and imbalances are avoided.
  • the at least one projection of the rotor shaft at least in sections, an elliptical outer contour.
  • the projection of the rotor shaft can either have an elliptical outer contour over its entire length or can only have a section with an elliptical outer contour.
  • the elliptical outer contour in this case forms the at least one torque-transmitting region.
  • the at least one projection of the rotor shaft includes a first, the rotor cup facing portion and a second, facing away from the rotor cup end shaft portion facing.
  • the section facing the shaft end contains the at least one torque-transmitting region, which may be designed, for example, as a torque-transmitting surface or edge.
  • the at least one projection or a portion of the at least one projection of the rotor shaft has at least one groove which contains the at least one torque-transmitting region. This can be produced in a favorable manufacturing technology by milling.
  • the second section includes a wrench size or an elliptical outer contour. This in turn then forms the torque-transmitting region, here in the form of a torque-transmitting surface. If the second section contains a wrench size, then both the wrench size at the second section of the projection and the corresponding counterpart area or counter surface at the rotor cup can be produced in a particularly simple manner. However, it is also possible to provide only a single torque transmitting area on the second section.
  • the first section has a cylindrical outer contour.
  • the cylindrical outer contour can be made in a simple manner centering.
  • the rotor shaft can be fixed in the rotor cup, for example by a press fit.
  • the at least one recess of the rotor cup includes a through-hole, in particular a cylindrical through-hole. It is particularly advantageous if the receptacle for the permanent magnet in the cylindrical through hole is arranged or is formed directly through the cylindrical through hole. At the same time, this makes it possible to achieve a particularly good axial hold, since with a mounted spinning rotor the projection of the rotor shaft and the permanent magnet can touch each other directly.
  • the through-hole can also be elliptical or oval. In this case, in turn, the inner, elliptical or oval lateral surface of the through-bore forms the at least one torque-transmitting counter-surface or the at least one torque-transmitting counter-region.
  • the invention provides that the at least one recess of the rotor cup includes a first, in particular cylindrical portion, in which engages the first portion of the projection of the rotor shaft, and a second portion which includes the at least one torque-transmitting counter area and with the second portion of Projection of the rotor shaft cooperates.
  • first, in particular cylindrical portion in which engages the first portion of the projection of the rotor shaft
  • second portion which includes the at least one torque-transmitting counter area and with the second portion of Projection of the rotor shaft cooperates.
  • Such an embodiment is of course possible not only with two portions of the projection of the rotor shaft or with two sections of the recess of the rotor cup. Likewise, three or more sections may be provided. In this case, the at least one torque-transmitting region or counter-region does not necessarily have to be arranged on the first section facing away from the rotor cup.
  • the second section of the recess includes at least one groove, which preferably extends over the entire width of the collar of the rotor cup.
  • the preparation of the rotor cup or the spinning rotor is thus possible in a particularly simple manner by milling the groove or grooves.
  • the permanent magnet in the receptacle in particular in the through hole, the rotor cup is clipped.
  • the simple replacement as well as the simple assembly are further supported.
  • the permanent magnet has a plastic coating.
  • the permanent magnet can be fixed in a particularly simple manner by means of the plastic coating in the receptacle. Due to the elasticity of the plastic coating can not only a clamping of the permanent magnet in its recording, but also a partial positive retention can be achieved.
  • the rotor shaft and / or the rotor cup has a stop surface for the axial positioning of the rotor shaft with respect to the rotor cup.
  • the assembly of the spinning rotor is thereby further simplified.
  • the shaft end arranged on the projection of the rotor shaft forms a support surface for the permanent magnet.
  • the rotor shaft consists of a ferromagnetic material at least in the region of its projection.
  • FIG. 1 shows an open-end spinning rotor 1 in a storage 5 in a schematic, sectional overview.
  • the spinning rotor 1 is supported according to the present illustration in a magnetic bearing arrangement as a bearing 5 at two bearing points.
  • the open-end spinning rotor 1 is rotatably mounted in the bearing 5 and is driven by an electric motor, not shown.
  • an open-end spinning rotor 1 according to the invention in a conventional bearing 5 with support disks.
  • an axial bearing of the open-end spinning rotor 1 which may for example also be designed as a magnetic bearing.
  • the open-end spinning rotor 1 includes a rotor cup 2 and a rotor shaft 4, which by a coupling device 6, which includes a positive connection (not visible in the present illustration) for transmitting torque between the rotor cup 2 and the rotor shaft 4, and a permanent magnet 7 for axial Connection of rotor shaft 4 and rotor cup 2.
  • the positive connection for torque transmission is formed directly on the rotor shaft 4 and the rotor cup 2, so that they are connected directly to each other in a particularly advantageous manner without additional components.
  • the rotor shaft 4 includes a projection 8 with at least one torque-transmitting region 9 (see, for example FIG. 2 ).
  • a corresponding to the projection 8 recess 10 in the rotor cup 2 with at least one torque-transmitting counter region 11 (see FIGS. 3 and 4 ) arranged.
  • the projection 8 engages in the corresponding recess 10 of the rotor cup 2 and thereby forms the positive connection for torque transmission.
  • the rotor cup 2 is provided with a through hole 14, which at the same time forms the recess 10 for the projection 8 and a receptacle 12 for the permanent magnet 7.
  • This embodiment can be produced in a particularly simple manner and also allows easy installation and easy installation and removal of the permanent magnet 7. It is also particularly advantageous that through the through hole 14, the coupling device 6 is less susceptible to contamination such as fiber adhesions or this in easy way through the through hole 14 can be removed again.
  • the through hole 14 can be designed as a cylindrical bore, so that it can serve at the same time the centering of the rotor cup 2 on the rotor shaft 4.
  • the projection 8 of the rotor shaft 4 is therefore also predominantly cylindrical.
  • the cylindrical projection 8 extends into the center of mass of the rotor cup 2, whereby a particularly good centering can take place.
  • FIG. 1 Removable, while the recess 10 of the rotor cup 2 has a first portion 10a, which is cylindrical in the present case, and a second portion 10b, which includes the at least one torque-transmitting counter region 11.
  • the rotor shaft 4 according to the present illustration on a first portion 8a, which is cylindrical, and a second portion 8b, which faces the shaft end facing away from the rotor end, and one or more torque transmitting areas 9, which are formed as surfaces or edges can, includes.
  • the second portion 8 b of the projection 8 and the second portion 10 b of the recess 10 may have different contours to one or provide multiple torque transmitting surfaces or areas 9. It is advantageous if the second portion 10b and the second portion 8b are formed as short as possible relative to the longitudinal axis of the spinning rotor to avoid imbalances during operation.
  • FIG. 2 shows a first embodiment of a projection 8 on a rotor shaft 4 with a first portion 8a and a second portion 8b.
  • the first portion 8a is cylindrical as described above, while the second portion 8b includes a spanner width 13.
  • the second section 8b provides two opposing torque-transmitting regions 9 ready.
  • FIG. 3 shows a rotor cup 2, which with the rotor shaft 4 of FIG. 2 can be mounted to an open-end spinning rotor 1, and which has a recess 10 with a first portion 10a and a second portion 10b.
  • the first portion 10a is formed corresponding to the projection 8a as a cylindrical bore. How to FIG. 1 described, while the cylindrical bore may be formed as a through hole 14 and include the receptacle 12 for the permanent magnet. Likewise, however, the first portion 10a may also be formed as a blind hole.
  • the second portion 10b is presently formed as a groove 20 and provides two torque-transmitting surfaces or counter-regions 11 which, with the key width 13 of the projection 8 of FIG. 2 can interact.
  • the groove-shaped, second portion 10b is in this case production engineering low back of the opening of the rotor cup 2 on the collar 3 of the rotor cup 2 arranged.
  • FIG. 4 shows an alternative embodiment of a rotor cup 2, as well as in FIG. 3 shown recess 10 has a first portion 10a and a second portion 10b.
  • the second portion 10b is designed as over the entire width of the collar 3 of the rotor cup 2 extending groove 20, which also two torque-transmitting counter regions 11 includes.
  • Such a recess 10 can be made in a particularly simple manner.
  • FIG. 5 shows another embodiment of a rotor shaft 4 with a in a first portion 8a and a second portion 8b sub-projection.
  • the first section 8a is in turn cylindrically shaped, while the second section 8b has an elliptical outer contour whose peripheral surface forms the at least one torque-transmitting region 9.
  • the rotor cup 2 (not shown here) in this case includes similar to those in FIG. 3 5 shows a recess 10 with a first portion 10a, which is cylindrical and a second portion 10b, which is similar to the representation of FIG. 3 elliptical is executed.
  • the second portion 8b of the projection 8 and the second portion 10b of the recess 10 may also have a square or an oval (similar to that in FIG FIG. 3 shown form) or a polygon.
  • FIG. 2 it is for example in a modification of FIG. 2 also possible, instead of flattening a key width 13, only one side of the second section 8b of the projection 8 to flatten, so that likewise only one torque-transmitting region 9 is available.
  • FIG. 6 shows a further embodiment of the invention, in which a projection 8 on a rotor shaft 4, however, has only a single portion.
  • the projection 8 is elliptical in the present representation and engages in an elliptical hole, not shown, a rotor cup 2, which can be produced for example by milling, a. It is thus also in the lead of FIG. 6 only a single torque-transmitting area 9 is provided.
  • the projection 8 of the rotor shaft 4 may, of course, deviating from the illustration shown also have an oval shape.
  • FIG. 7 shows a rotor cup 2 with a part of the rotor shaft 4 in a detailed view.
  • FIG. 7 Removable, while the rotor cup 2 as the rotor shaft 4 each have an axial stop surface 16, so that in the assembly of the open-end spinning rotor after reaching the stop surfaces 16, the rotor cup 2 is automatically positioned correctly in the axial direction with respect to the rotor shaft 4.
  • the permanent magnet is arranged in a receptacle 12, which is formed by a through hole 14 of the rotor cup 2.
  • the rotor cup 2 facing the end of the rotor shaft 4 forms a positioning surface 17 for the permanent magnet 7, so that after the assembly of the open-end spinning rotor 1 also only in the through hole 14 and its recording 12 must be pressed or clipped and in axial direction is automatically positioned.
  • the receptacle 12 for the permanent magnet 7 includes the present illustration, a circumferential groove 18. If the permanent magnet 7 includes a plastic coating 15, so by deformation of the elastic plastic coating 15 sufficient retention of the permanent magnet 7 already by simply pressing the receptacle 12 can be achieved. By deformation of the plastic coating 15 results in a partially positive fit.
  • the permanent magnet 7 may also be provided with a special holder (not shown), for example a metallic holder, by means of which it can be clipped into the receptacle 12.
  • a ring magnet is arranged as a permanent magnet 7 in the collar 3 of the rotor cup 2.
  • the rotor cup 2 is for this purpose provided with a stepped bore formed as a through hole 14, wherein according to the present Representations of the larger diameter of the stepped bore forms the receptacle 12 for the annular permanent magnet 7.
  • the ring magnet inserted from the side of the collar 3 ago in the rotor cup 2.
  • the permanent magnet 7 may be slightly larger in this embodiment than in the arrangement of FIG. 7 , so that there is a particularly good axial grip.
  • the ring magnet also forms at least partially the first portion 10a of the recess 10 in the rotor cup, in which the projection 8 and the second portion 8b of the projection 8 of the rotor shaft 4 can be fixed.
  • the ring magnet is then arranged directly behind the torque-transmitting counter regions 11 forming the second portion 10 b of the recess 10.
  • the second portion 10b of the recess 10 of the rotor cup 2 includes a groove 20 as in FIG. 3 shown, wherein, however, the torque-transmitting counter regions 11 are interrupted by the receptacle 12 for the permanent magnet 7, so that in the present case four torque-transmitting counter regions 11 are formed.
  • the projection 8 of the rotor shaft 4 corresponds to the in FIG. 2 shown.
  • a ring magnet is also shown as a permanent magnet 7, the second portion 10b of the recess 10 of the rotor cup 2 is in the form of a rounded polygon, here a rounded triangle formed.
  • An advantage of this embodiment is that several, here three, positions for mounting the rotor shaft 4 in the rotor cup 2 are available. The production of such a rounded polygon is easily possible by milling both for the recess 10 and for the projection 8. It would therefore deviating from the representation shown also possible to perform the entire recess 10 and the entire projection 8 so polygonal, similar to the in FIG. 6 shown execution.
  • the permanent magnet 7 would then in turn be arranged in the axial extension of the projection 8.
  • the hole on the rotor cup 2 to the rotor bottom 19 is open and therefore any impurities do not adhere to the coupling device 5 between the projection 8 of the rotor shaft and the ring magnet, but can be removed through the through hole 14 , Furthermore, the rotor cup 2 can be made shorter than in an embodiment in which the permanent magnet 7 is arranged in the axial extension of the projection 8.
  • FIG. 10 Another embodiment of a coupling device 6 is shown in FIG Fig. 10 shown.
  • the rotor cup 2 can as well as the FIG. 1 be provided with a through hole 14, which can form the receptacle 12 (not visible) for the permanent magnet 7 (also not visible).
  • the through hole 14 at the same time also serves to center the rotor cup 2 to the rotor shaft 4 by means of the projection 8 or the first portion 8a of the projection 8.
  • the recess 10 of the rotor cup 2 also has a first portion 10a, which is cylindrical in the present case through the through-bore 14, and a second portion 10b, which contains the at least one torque-transmitting counter-region 11.
  • the first portion 10a may be formed instead of the through hole 14 as a blind hole to receive the permanent magnet 7 and to center the rotor shaft 4.
  • the second section 10b of the recess 10 of the rotor cup includes in the present case a plurality of grooves 20, which in the present case are each arranged at a 30 ° angle to each other and which each have at least one torque-transmitting region 9. These grooves 20 can be introduced radially by means of a milling cutter in a simple manner.
  • the second section 8b of the projection 8 of the rotor shaft 4 includes a plurality of grooves 20, which in the present case are likewise arranged at a 30 ° angle to one another and which each include at least one torque-transmitting region 9.
  • the grooves 20 each extend over the entire width of the collar 3 of the rotor cup 2, so that the production is further simplified.
  • An advantage of such a design with a plurality of grooves 20 is that during assembly of the rotor cup 2 on the rotor shaft 4, the rotor cup only needs to be slightly rotated, until the projection 8 and the plurality of projection 8 forming, remaining between the grooves 20 Elevations in the grooves 20 of the recess 10 of the rotor cup 2 engage.
  • the torque-transmitting regions 9 of the projection 8 and the torque-transmitting counter regions 11 of the recess 10 can be formed by the side surfaces of the grooves 20 or only by the end edges of the grooves 20.
  • a projection and a recess as shown predominantly in the exemplary embodiments, a plurality of projections may also be arranged on the rotor shaft, which correspondingly cooperate with a plurality of recesses on the rotor cup. Further modifications and combinations within the scope of the claims, as far as technically possible and reasonable, also fall under the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Description

Die vorliegende Erfindung betrifft einen Offenend-Spinnrotor mit einer Rotortasse, in welcher ein Fasermaterial verspinnbar ist, und mit einem Rotorschaft, über welchen der Spinnrotor in einer Lagerung, insbesondere in einer Magnetlagerung, abstützbar ist. Der Rotorschaft und die Rotortasse sind dabei über eine Kupplungsvorrichtung lösbar miteinander verbunden. Die Kupplungsvorrichtung beinhaltet eine formschlüssige Verbindung zur Drehmomentübertragung zwischen der Rotortasse und dem Rotorschaft sowie eine Magneteinrichtung zur axialen Verbindung von Rotorschaft und Rotortasse.The present invention relates to an open-end spinning rotor having a rotor cup, in which a fiber material is spinnable, and having a rotor shaft, via which the spinning rotor in a storage, in particular in a magnetic bearing, can be supported. The rotor shaft and the rotor cup are releasably connected together via a coupling device. The coupling device includes a positive connection for torque transmission between the rotor cup and the rotor shaft and a magnetic device for the axial connection of the rotor shaft and rotor cup.

Bei der Herstellung von Garnen in Offenend-Spinnmaschinen ist es erforderlich, je nach Art des zu verspinnenden Fasermaterials sowie je nach Art des gewünschten herzustellenden Garns erforderlich, unterschiedliche Spinnrotoren bzw. Spinnrotoren mit unterschiedlichen Rotortassen zu verwenden, da die Form und die Ausführung der Rotortasse des Spinnrotors einen erheblichen Einfluss auf das Spinnergebnis hat. Die Rotortassen von Spinnrotoren in Offenend-Spinnmaschinen sind aufgrund des ständigen Faserkontaktes auch einem erheblichen Verschleiß unterworfen und müssen daher ausgetauscht werden. Je nach Aufbau der Offenend-Spinnvorrichtung und der Lagerung des Spinnrotors kann dabei das Austauschen der Spinnrotoren mit einem erheblichen Aufwand verbunden sein, so dass Spinnrotoren oftmals mit einer Kupplungseinrichtung versehen werden, um die Rotortasse austauschen zu können. Insbesondere in Offenend-Spinnvorrichtungen, in welchen der Rotorschaft in einer Magnetlagerung gelagert ist, ist der Ein- oder Ausbau des vollständigen Spinnrotors aufwändig, so dass dort in aller Regel Spinnrotoren mit einer Kupplungsvorrichtung zum Einsatz kommen.In the production of yarns in open-end spinning machines, it is necessary depending on the type of fiber material to be spinned and depending on the type of yarn to be produced to use different spinning rotors or spinning rotors with different rotor cups, since the shape and design of the rotor cup of Spinning rotor has a significant influence on the spin result. The rotor cups of spinning rotors in open-end spinning machines are also subject to considerable wear due to the constant fiber contact and must therefore be replaced. Depending on the structure of the open-end spinning device and the storage of the spinning rotor, the replacement of the spinning rotors can be associated with considerable effort, so that spinning rotors are often provided with a coupling device to replace the rotor cup can. In particular, in open-end spinning devices in which the rotor shaft is mounted in a magnetic bearing, the installation or removal of the complete spinning rotor is complex, so there usually come spinning rotors with a coupling device used.

Die DE 38 15 182 A1 beschreibt einen Spinnrotor mit einer derartigen Kupplungsanordnung. Die DE 38 15 182 A1 sieht dabei vor, am Ende des Rotorschaftes eine Kupplungsschale mit einer Ausnehmung oder Hülse anzuordnen, in welcher ein entsprechend komplementär ausgebildeter Zapfen, welcher rückseitig am Boden des Rotortopfes angeordnet ist, eingreift. Die Drehmomentübertragung von der Rotorwelle auf den Rotortopf soll dabei durch eine formschlüssige Verbindung der beiden Kupplungsteile miteinander erfolgen. Nach einer zweiten Ausführung können anstelle eines großen, mittigen Zapfens auch mehrere kleinere Zapfen vorgesehen sein, welche in Ausnehmungen der Kupplungsschale eingreifen. Zum Festhalten des Rotortopfes dient ein Permanentmagnet, der in die Kupplungsscheibe am Rotorschaft eingesetzt ist. Die Kupplungsanordnung ist vergleichsweise aufwändig herzustellen und zudem vergleichsweise groß und schwer, was bei den heutigen hohen Drehzahlen nachteilig ist.The DE 38 15 182 A1 describes a spinning rotor with such a coupling arrangement. The DE 38 15 182 A1 provides, at the end of the rotor shaft to arrange a coupling shell with a recess or sleeve, in which a correspondingly complementary trained pin, which is arranged at the back of the bottom of the rotor pot, engages. The torque transmission from the rotor shaft to the rotor pot is to be done by a positive connection of the two coupling parts together. According to a second embodiment may be provided instead of a large, central pin and a plurality of smaller pins which engage in recesses of the coupling shell. To hold the rotor pot is a permanent magnet, which is inserted into the clutch disc on the rotor shaft. The clutch assembly is relatively complex to produce and also relatively large and heavy, which is disadvantageous at today's high speeds.

Die EP 1 156 142 B1 zeigt einen Spinnrotor, welcher bereits für eine Offenend-Spinnvorrichtung mit einer Magnetlageranordnung vorgesehen ist. Die Kupplungsvorrichtung beinhaltet eine am Schaft des Spinnrotors angeordnete Aufnahmehülse, in welcher ein Innensechskant angeordnet ist. An der Rotortasse ist als Kupplungsvorrichtung ein zylindrischer Führungsansatz ausgebildet, welcher in die Aufnahmehülse des Rotorschaftes eingreift. In Verlängerung des zylindrischen Führungsansatzes befindet sich ein Außensechskant, welcher in den Innensechskant in der Hülse des Rotorschaftes eingreift. Hinter der Aufnahmehülse des Rotorschaftes, welche den Innensechskant beinhaltet, ist ebenfalls innerhalb des Rotorschaftes ein Permanentmagnet angeordnet, welcher die axiale Sicherung der Kupplungsvorrichtung übernehmen soll. Die Herstellung des Spinnrotors mit dem zusätzlichen Führungsansatz sowie der zusätzlichen Aufnahmehülse ist ebenfalls vergleichsweise aufwändig.The EP 1 156 142 B1 shows a spinning rotor, which is already provided for an open-end spinning device with a magnetic bearing assembly. The coupling device includes a receiving sleeve arranged on the shaft of the spinning rotor, in which a hexagon socket is arranged. At the rotor cup as a coupling device, a cylindrical guide projection is formed, which engages in the receiving sleeve of the rotor shaft. In extension of the cylindrical guide lug is an external hexagon, which engages in the hexagon socket in the sleeve of the rotor shaft. Behind the receiving sleeve of the rotor shaft, which includes the hexagon socket, a permanent magnet is also disposed within the rotor shaft, which is to take over the axial securing of the coupling device. The production of the spinning rotor with the additional guide projection and the additional receiving sleeve is also relatively expensive.

Die EP 2 463 415 A2 zeigt einen Spinnrotor mit einem Rotorschaft und einer Rotortasse, die durch eine Kupplungsvorrichtung miteinander verbunden sind. Der Spinnrotor beinhaltet dabei eine Bohrung in der Rotortasse und einen dazu korrespondierenden, zylindrischen Bereich am Rotorschaft, die ineinander greifen. Um den Rotorschaft und die Rotortasse miteinander zu verbinden, beinhaltet die Kupplungsvorrichtung eine Schraubverbindung. Die axiale Sicherung sowie die Drehmomentübertragung vom Rotorschaft auf die Rotortasse erfolgt somit kraftschlüssig.The EP 2 463 415 A2 shows a spinning rotor with a rotor shaft and a rotor cup, which are interconnected by a coupling device. The spinning rotor includes a hole in the rotor cup and a corresponding cylindrical portion on the rotor shaft, the one inside the other to grab. In order to connect the rotor shaft and the rotor cup together, the coupling device includes a screw connection. The axial securing and torque transmission from the rotor shaft to the rotor cup thus takes place positively.

Die EP 1 710 050 A2 zeigt ein Werkzeug zum Haltern und manuellen Antreiben eines Schraub-Bits. Das Schraub-Bit weist an seinem der Schraubspitze abgewandten Ende einen Sechskant auf, der in einen Innensechskant eines Gehäuses des Werkzeugs eingreift. Im Gehäuse des Werkzeugs sind mehrere Magneten vorgesehen.The EP 1 710 050 A2 shows a tool for holding and manually driving a screw bit. The screw bit has at its end facing away from the screw tip a hexagon, which engages in a hexagon socket of a housing of the tool. In the housing of the tool a plurality of magnets are provided.

Aufgabe der vorliegenden Erfindung ist es, einen Offenend-Spinnrotor mit einer Kupplungsvorrichtung vorzuschlagen, welcher einen einfachen und wartungsfreundlichen in Aufbau aufweist.Object of the present invention is to propose an open-end spinning rotor with a coupling device, which has a simple and easy to maintain in construction.

Die Aufgabe wird gelöst mit den Merkmalen des Anspruchs 1.The object is achieved with the features of claim 1.

Bei einem Offenend-Spinnrotor mit einer Rotortasse, einem Rotorschaft sowie einer Kupplungsvorrichtung, mittels welcher der Rotorschaft und die Rotortasse lösbar miteinander verbunden sind, beinhaltet die Kupplungsvorrichtung eine formschlüssige Verbindung zur Drehmomentübertragung sowie eine Magneteinrichtung zur axialen Verbindung von Rotorschaft und Rotortasse. Es ist nun vorgesehen, die Kupplungsvorrichtung mit ihren beiden Kupplungsbestandteilen jeweils direkt an dem Rotorschaft bzw. der Rotortasse ohne Zwischenschaltung weiterer Bauteile anzuordnen. Die Montage des Offenend-Spinnrotors ist hierdurch besonders einfach, da lediglich beiden Teile Rotorschaft und Rotortasse miteinander verbunden werden müssen und ggf. noch der Permanentmagnet eingesetzt werden muss. Zudem ist es hierdurch möglich, eine Kupplungsvorrichtung mit einem nur sehr geringem Gewicht bereitzustellen, welche keinen zusätzlichen Platzbedarf benötigt. Der Offenend-Spinnrotor ist daher besonders vorteilhaft auch in Offenend-Spinnvorrichtungen mit hohen Drehzahlen über 130 000 einsetzbar.In an open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device, by means of which the rotor shaft and the rotor cup are releasably connected to each other, the coupling device includes a positive connection for torque transmission and a magnetic device for the axial connection of the rotor shaft and rotor cup. It is now provided to arrange the coupling device with its two coupling components directly to the rotor shaft or the rotor cup without the interposition of other components. The assembly of the open-end spinning rotor is thereby particularly simple, since only two parts rotor shaft and rotor cup must be connected to each other and possibly even the permanent magnet must be used. In addition, it is thereby possible to provide a coupling device with a very low weight, which does not require additional space. The open-end spinning rotor can therefore be used particularly advantageously in open-end spinning devices with high speeds of more than 130,000.

Als Kupplungsvorrichtung weist der Rotorschaft wenigstens einen Vorsprung mit wenigstens einem drehmomentübertragenden Bereich auf, welcher in wenigstens eine dazu korrespondierende Ausnehmung der Rotortasse mit wenigstens einem drehmomentübertragenden Gegenbereich eingreift. An der Rotortasse, insbesondere im Rotorboden der Rotortasse, ist eine Aufnahme für einen Permanentmagneten angeordnet. Dadurch, dass der Permanentmagnet an der Rotortasse angeordnet ist, ist es in besonders einfacher und günstiger Weise möglich, diesen nach Ablauf seiner Lebensdauer zu entfernen und durch einen neuen Permanentmagneten zu ersetzen. Eine aufwändige Demontage des Rotorschaftes aus der Lagerung der Offenend-Spinnvorrichtung ist hierzu nicht erforderlich.As a coupling device, the rotor shaft has at least one projection with at least one torque-transmitting region, which engages in at least one corresponding recess of the rotor cup with at least one torque-transmitting counter region. At the rotor cup, in particular in the rotor bottom of the rotor cup, a receptacle for a permanent magnet is arranged. The fact that the permanent magnet is arranged on the rotor cup, it is possible in a particularly simple and effective way to remove it after its lifetime and replace it with a new permanent magnet. A complex disassembly of the rotor shaft from the storage of the open-end spinning device is not required for this purpose.

Befindet sich die Aufnahme für den Permanentmagneten direkt im Boden der Rotortasse, so ist der Permanentmagnet besonders gut zugänglich und einfach austauschbar. Besonders vorteilhaft bei dieser Anordnung ist es auch, dass der Permanentmagnet sich an dem Verschleißteil des Spinnrotors, nämlich der Rotortasse befindet, welche ohnehin nach einer gewissen Zeit ausgewechselt werden muss. Es hat sich nämlich gezeigt, dass derartige Magnete oftmals eine vergleichsweise kurze Lebensdauer haben und daher ausgetauscht werden müssen. Dies ist nun durch die Anordnung des Permanentmagneten an oder in der leicht austauschbaren Rotortasse problemlos möglich, da der Magnet leicht zugänglich ist.If the holder for the permanent magnet is located directly in the bottom of the rotor cup, the permanent magnet is particularly easily accessible and easily replaceable. Particularly advantageous in this arrangement, it is also that the permanent magnet is located on the wear part of the spinning rotor, namely the rotor cup, which must be replaced anyway after a certain time. It has been shown that such magnets often have a comparatively short life and therefore must be replaced. This is now easily possible by the arrangement of the permanent magnet on or in the easily replaceable rotor cup, since the magnet is easily accessible.

Eine besonders gute Zugänglichkeit und damit eine besonders einfache Auswechselbarkeit des Permanentmagneten ergibt sich, wenn diese in axialer Verlängerung der Ausnehmung für den Vorsprung des Rotorschafts angeordnet ist. Zugleich ergibt sich hierdurch auch eine besonders gute axiale Verbindung zwischen dem Rotorschaft und der Rotortasse.A particularly good accessibility and thus a particularly simple interchangeability of the permanent magnet results when it is arranged in the axial extension of the recess for the projection of the rotor shaft. At the same time, this results in a particularly good axial connection between the rotor shaft and the rotor cup.

Eine einfache Herstellung sowie eine einfache Montage des Offenend-Spinnrotors wird ermöglicht, wenn die Aufnahme für den Permanentmagneten durch eine Bohrung in der Rotortasse ausgebildet ist. Vorzugsweise befindet sich eine derartige Bohrung im Boden der Rotortasse, so dass der Permanentmagnet einfach von der Öffnung der Rotortasse her in die Aufnahme eingebracht werden kann. Ebenso ist es aber auch möglich, einen oder mehrere Permanentmagneten innerhalb des Bundes der Rotortasse so anzuordnen dass diese bei montiertem Spinnrotor neben dem Vorsprung des Rotorschafts liegen. Beispielsweise kann auch ein ringförmiger Permanentmagnet in dem Bund der Rotortasse angeordnet sein, welcher bei montiertem Spinnrotor den Vorsprung des Rotorschafts umgibt.A simple manufacture and easy installation of the open-end spinning rotor is made possible when the recording for the permanent magnet is formed by a hole in the rotor cup. Preferably, such a bore is located in the bottom of the rotor cup, so that the permanent magnet can be easily introduced into the receptacle from the opening of the rotor cup. Likewise, it is also possible to arrange one or more permanent magnets within the confederation of the rotor cup so that they are in the assembled spinning rotor next to the projection of the rotor shaft. For example, an annular permanent magnet may also be arranged in the collar of the rotor cup, which surrounds the projection of the rotor shaft when the spinning rotor is mounted.

Nach einer vorteilhaften Ausführung der Erfindung weist der wenigstens eine Vorsprung des Rotorschafts zumindest an seinem der Rotortasse zugewandten Ende eine zylindrische Außenkontur auf. Hierdurch kann eine gute Zentrierung der Rotortasse zu dem Rotorschaft erreicht werden und Unwuchten vermieden werden.According to an advantageous embodiment of the invention, the at least one projection of the rotor shaft at least at its the rotor cup end facing a cylindrical outer contour. In this way, a good centering of the rotor cup can be achieved to the rotor shaft and imbalances are avoided.

Nach einer anderen Ausführung der Erfindung weist der wenigstens eine Vorsprung des Rotorschafts zumindest abschnittsweise eine elliptische Außenkontur auf. Der Vorsprung des Rotorschafts kann demnach entweder über seine gesamte Länge eine elliptische Außenkontur aufweisen oder lediglich einen Abschnitt mit einer elliptischen Außenkontur aufweisen. Die elliptische Außenkontur bildet in diesem Fall den wenigstens einen drehmomentübertragenden Bereich.According to another embodiment of the invention, the at least one projection of the rotor shaft, at least in sections, an elliptical outer contour. Accordingly, the projection of the rotor shaft can either have an elliptical outer contour over its entire length or can only have a section with an elliptical outer contour. The elliptical outer contour in this case forms the at least one torque-transmitting region.

Nach der Erfindung beinhaltet der wenigstens eine Vorsprung des Rotorschafts einen ersten, der Rotortasse zugewandten Abschnitt und einen zweiten, seinem der Rotortasse abgewandten Schaftende zugewandten Abschnitt. Der dem Schaftende zugewandte Abschnitt beinhaltet dabei den wenigstens einen drehmomentübertragenden Bereich, der beispielsweise als drehmomentübertragende Fläche oder Kante ausgebildet sein kann. Durch die Unterteilung des Vorsprungs in zwei oder mehrere Abschnitte ist es möglich, diesen Abschnitten jeweils eine eigene Aufgabe zuzuordnen, also beispielsweise an einem Abschnitt eine oder mehrere drehmomentübertragende Bereiche vorzusehen und über einen weiteren Abschnitt die Zentrierung des Rotorschafts zu der Rotortasse vorzunehmen. Ebenso kann einer der Abschnitte der Verbindung der Rotortasse mit dem Rotorschaft dienen.According to the invention, the at least one projection of the rotor shaft includes a first, the rotor cup facing portion and a second, facing away from the rotor cup end shaft portion facing. In this case, the section facing the shaft end contains the at least one torque-transmitting region, which may be designed, for example, as a torque-transmitting surface or edge. By dividing the projection into two or more sections, it is possible to assign these sections each have their own task, so for example to provide at one section one or more torque-transmitting areas and to make over a further section, the centering of the rotor shaft to the rotor cup. Likewise, one of the sections of the connection of the rotor cup with the rotor shaft can serve.

Ebenfalls vorteilhaft ist es, wenn der wenigstens eine Vorsprung oder ein Abschnitt des wenigstens einen Vorsprungs des Rotorschafts wenigstens eine Nut aufweist, welche den wenigstens einen drehmomentübertragenden Bereich beinhaltet. Diese kann in fertigungstechnisch günstiger Weise durch Fräsen hergestellt werden.It is also advantageous if the at least one projection or a portion of the at least one projection of the rotor shaft has at least one groove which contains the at least one torque-transmitting region. This can be produced in a favorable manufacturing technology by milling.

Besonders vorteilhaft ist es, wenn der zweite Abschnitt eine Schlüsselweite oder eine elliptische Außenkontur beinhaltet. Diese bildet dann wiederum den drehmomentübertragenden Bereich, hier in Form einer drehmomentübertragenden Fläche. Beinhaltet der zweite Abschnitt eine Schlüsselweite, so kann sowohl die Schlüsselweite an dem zweiten Abschnitt des Vorsprungs als auch der korrespondierende Gegenbereich bzw. die Gegenfläche an der Rotortasse in besonders einfacher Weise hergestellt werden. Es ist jedoch ebenso möglich, nur einen einzigen drehmomentübertragenden Bereich an dem zweiten Abschnitt vorzusehen.It is particularly advantageous if the second section includes a wrench size or an elliptical outer contour. This in turn then forms the torque-transmitting region, here in the form of a torque-transmitting surface. If the second section contains a wrench size, then both the wrench size at the second section of the projection and the corresponding counterpart area or counter surface at the rotor cup can be produced in a particularly simple manner. However, it is also possible to provide only a single torque transmitting area on the second section.

Vorteilhaft ist es auch, wenn der erste Abschnitt eine zylindrische Außenkontur aufweist. Mittels der zylindrischen Außenkontur kann in einfacher Weise eine Zentrierung vorgenommen werden. Zudem kann durch diese zugleich der Rotorschaft in der Rotortasse beispielsweise durch einen Presssitz befestigt werden.It is also advantageous if the first section has a cylindrical outer contour. By means of the cylindrical outer contour can be made in a simple manner centering. In addition, by this at the same time the rotor shaft can be fixed in the rotor cup, for example by a press fit.

Ebenso ist es für die Herstellung sowie die Montage des Spinnrotors vorteilhaft, wenn die wenigstens eine Ausnehmung der Rotortasse eine Durchgangsbohrung, insbesondere eine zylindrische Durchgangsbohrung beinhaltet. Besonders vorteilhaft ist es dabei, wenn auch die Aufnahme für den Permanentmagneten in der zylindrischen Durchgangsbohrung angeordnet ist oder direkt durch die zylindrische Durchgangsbohrung ausgebildet ist. Zugleich kann hierdurch ein besonders guter axialer Halt erreicht werden, da sich bei einem montierten Spinnrotor der Vorsprung des Rotorschafts und der Permanentmagnet direkt berühren können. Je nach Ausführung des Vorsprungs an dem Rotorschaft kann jedoch die Durchgangsbohrung auch elliptisch oder oval ausgeführt sein. In diesem Falle bildet wiederum die innere, elliptische oder ovale Mantelfläche der Durchgangsbohrung die wenigstens eine drehmomentübertragende Gegenfläche bzw. den wenigstens einen drehmomentübertragenden Gegenbereich.Likewise, it is advantageous for the manufacture and assembly of the spinning rotor when the at least one recess of the rotor cup includes a through-hole, in particular a cylindrical through-hole. It is particularly advantageous if the receptacle for the permanent magnet in the cylindrical through hole is arranged or is formed directly through the cylindrical through hole. At the same time, this makes it possible to achieve a particularly good axial hold, since with a mounted spinning rotor the projection of the rotor shaft and the permanent magnet can touch each other directly. Depending on the design of the projection on the rotor shaft, however, the through-hole can also be elliptical or oval. In this case, in turn, the inner, elliptical or oval lateral surface of the through-bore forms the at least one torque-transmitting counter-surface or the at least one torque-transmitting counter-region.

Ebenso sieht die Erfindung vor, dass die wenigstens eine Ausnehmung der Rotortasse einen ersten, insbesondere zylindrischen Abschnitt beinhaltet, in welchen der erste Abschnitt des Vorsprungs des Rotorschafts eingreift, sowie einen zweiten Abschnitt, welcher den wenigstens einen drehmomentübertragenden Gegenbereich beinhaltet und mit dem zweiten Abschnitt des Vorsprungs des Rotorschafts zusammenwirkt. Besonders vorteilhaft bei dieser Ausführung ist es, dass wie bereits beschrieben, den unterschiedlichen Abschnitten auch unterschiedliche Funktionen zugeordnet werden können. Die drehmomentübertragenden Flächen bzw. Bereiche, welche stets von der zylindrischen Form abweichen, können dadurch so groß ausgebildet werden, dass eine gute Drehmomentübertragung ermöglicht wird, andererseits aber bezogen auf die Längsachse des Spinnrotors so kurz ausgebildet werden, dass keine nennenswerten Unwuchten in dem Spinnrotor erzeugt werden. Eine derartige Ausführung ist dabei selbstverständlich nicht nur mit zwei Abschnitten des Vorsprungs des Rotorschafts bzw. mit zwei Abschnitten der Ausnehmung der Rotortasse möglich. Ebenso können auch drei oder mehr Abschnitte vorgesehen sein. Dabei muss auch der wenigstens eine drehmomentübertragende Bereich bzw. Gegenbereich nicht unbedingt an dem ersten, der Rotortasse abgewandten Abschnitt angeordnet sein.Likewise, the invention provides that the at least one recess of the rotor cup includes a first, in particular cylindrical portion, in which engages the first portion of the projection of the rotor shaft, and a second portion which includes the at least one torque-transmitting counter area and with the second portion of Projection of the rotor shaft cooperates. It is particularly advantageous in this embodiment that, as already described, different functions can also be assigned to the different sections. The torque-transmitting surfaces or regions, which always deviate from the cylindrical shape, can thereby be formed so large that a good torque transmission is made possible, but on the other hand are made so short relative to the longitudinal axis of the spinning rotor that no appreciable imbalances are generated in the spinning rotor become. Such an embodiment is of course possible not only with two portions of the projection of the rotor shaft or with two sections of the recess of the rotor cup. Likewise, three or more sections may be provided. In this case, the at least one torque-transmitting region or counter-region does not necessarily have to be arranged on the first section facing away from the rotor cup.

Besonders vorteilhaft ist es, wenn der zweite Abschnitt der Ausnehmung rückseitig der Rotortasse am Bund der Rotortasse angeordnet ist.It when the second portion of the recess is arranged on the back of the rotor cup on the collar of the rotor cup is particularly advantageous.

Weiterhin ist es vorteilhaft, wenn der zweite Abschnitt der Ausnehmung wenigstens eine Nut beinhaltet, die sich vorzugsweise über die gesamte Breite des Bundes der Rotortasse erstreckt. Die Herstellung der Rotortasse bzw. des Spinnrotors ist hierdurch in besonders einfache Weise durch Einfräsen der Nut oder Nuten möglich.Furthermore, it is advantageous if the second section of the recess includes at least one groove, which preferably extends over the entire width of the collar of the rotor cup. The preparation of the rotor cup or the spinning rotor is thus possible in a particularly simple manner by milling the groove or grooves.

Weiterhin ist es vorteilhaft, wenn der Permanentmagnet in der Aufnahme, insbesondere in der Durchgangsbohrung, der Rotortasse einclipsbar ist. Der einfache Austausch sowie die einfache Montage werden hierdurch weiter unterstützt.Furthermore, it is advantageous if the permanent magnet in the receptacle, in particular in the through hole, the rotor cup is clipped. The simple replacement as well as the simple assembly are further supported.

Daneben ist es vorteilhaft, wenn der Permanentmagnet einen Kunststoffüberzug aufweist. Hierdurch kann der Permanentmagnet in besonders einfacher Weise mittels des Kunststoffüberzugs in der Aufnahme festgelegt werden. Aufgrund der Elastizität des Kunststoffüberzugs kann dabei nicht nur eine Klemmung des Permanentmagneten in seiner Aufnahme, sondern auch ein teilweise formschlüssiger Halt erreicht werden.In addition, it is advantageous if the permanent magnet has a plastic coating. As a result, the permanent magnet can be fixed in a particularly simple manner by means of the plastic coating in the receptacle. Due to the elasticity of the plastic coating can not only a clamping of the permanent magnet in its recording, but also a partial positive retention can be achieved.

Daneben ist es vorteilhaft, wenn der Rotorschaft und/oder die Rotortasse eine Anschlagfläche für die axiale Positionierung des Rotorschafts in Bezug auf die Rotortasse aufweist. Die Montage des Spinnrotors ist hierdurch weiter vereinfacht.In addition, it is advantageous if the rotor shaft and / or the rotor cup has a stop surface for the axial positioning of the rotor shaft with respect to the rotor cup. The assembly of the spinning rotor is thereby further simplified.

Vorteilhaft ist es weiterhin, wenn das am Vorsprung des Rotorschafts angeordnete Schaftende eine Abstützfläche für den Permanentmagneten ausbildet. Nach erfolgter Montage des Spinnrotors muss dann nur noch der Permanentmagnet von der Seite des Rotorbodens her in die Durchgangsbohrung der Rotortasse eingebracht werden und ist nach Anschlag auf der Abstützfläche des Vorsprungs automatisch korrekt positioniert.It is furthermore advantageous if the shaft end arranged on the projection of the rotor shaft forms a support surface for the permanent magnet. After the assembly of the spinning rotor then only the permanent magnet must be introduced from the side of the rotor bottom forth in the through hole of the rotor cup and is automatically positioned correctly to stop on the support surface of the projection.

Vorteilhafterweise besteht der Rotorschaft zumindest im Bereich seines Vorsprungs aus einem ferromagnetischen Material.Advantageously, the rotor shaft consists of a ferromagnetic material at least in the region of its projection.

Weitere Vorteile der Erfindung werden anhand der nachfolgend dargestellten Ausführungsbeispiele beschrieben. Es zeigen:

Figur 1
einen erfindungsgemäßen Spinnrotor mit einer Kupplungsvorrichtung zwischen Rotorschaft und Rotortasse in einer schematischen Schnittdarstellung,
Figur 2
einen Vorsprung am Schaftende eines Rotorschafts nach einer ersten Ausführung,
Figuren 3 und 4
eine Rotortasse mit einer Ausnehmung für einen Vorsprung des Rotorschafts,
Figur 5
eine weitere Ausführung eines Vorsprungs an einem Rotorschaft,
Figur 6
eine weitere alternative Ausführung eines Vorsprungs an einem Rotorschaft,
Figur 7
eine Detaildarstellung einer Kupplungsvorrichtung in einem schematischen Schnitt,
Figur 8
eine weitere Ausführung einer Rotortasse mit einer Ausnehmung für einen Vorsprung des Rotorschafts und einem Ringmagneten,
Figur 9
eine weitere alternative Ausführung einer Rotortasse mit einer Ausnehmung für einen polygonalen Vorsprung des Rotorschafts, sowie
Figur 10
eine Darstellung einer weiteren Kupplungsvorrichtung in einer perspektivischen Ansicht.
Further advantages of the invention will be described with reference to the embodiments illustrated below. Show it:
FIG. 1
a spinning rotor according to the invention with a coupling device between the rotor shaft and rotor cup in a schematic sectional view,
FIG. 2
a projection on the shaft end of a rotor shaft according to a first embodiment,
FIGS. 3 and 4
a rotor cup having a recess for a projection of the rotor shaft,
FIG. 5
a further embodiment of a projection on a rotor shaft,
FIG. 6
a further alternative embodiment of a projection on a rotor shaft,
FIG. 7
a detailed view of a coupling device in a schematic section,
FIG. 8
a further embodiment of a rotor cup with a recess for a projection of the rotor shaft and a ring magnet,
FIG. 9
a further alternative embodiment of a rotor cup having a recess for a polygonal projection of the rotor shaft, and
FIG. 10
a representation of another coupling device in a perspective view.

Figur 1 zeigt einen Offenend-Spinnrotor 1 in einer Lagerung 5 in einer schematischen, geschnittenen Übersichtsdarstellung. Der Spinnrotor 1 ist nach vorliegender Darstellung in einer Magnetlageranordnung als Lagerung 5 an jeweils zwei Lagerstellen abgestützt. Der Offenend-Spinnrotor 1 ist drehbar in der Lagerung 5 gelagert und wird durch einen nicht dargestellten Elektromotor angetrieben. Es ist jedoch auch möglich, einen erfindungsgemäßen Offenend-Spinnrotor 1 in einer herkömmlichen Lagerung 5 mit Stützscheiben anzuordnen. Ebenfalls nicht dargestellt ist ein axiales Lager des Offenend-Spinnrotors 1, welches beispielsweise ebenfalls als Magnetlager ausgebildet sein kann. FIG. 1 shows an open-end spinning rotor 1 in a storage 5 in a schematic, sectional overview. The spinning rotor 1 is supported according to the present illustration in a magnetic bearing arrangement as a bearing 5 at two bearing points. The open-end spinning rotor 1 is rotatably mounted in the bearing 5 and is driven by an electric motor, not shown. However, it is also possible to arrange an open-end spinning rotor 1 according to the invention in a conventional bearing 5 with support disks. Also not shown is an axial bearing of the open-end spinning rotor 1, which may for example also be designed as a magnetic bearing.

Der Offenend-Spinnrotor 1 beinhaltet eine Rotortasse 2 sowie einen Rotorschaft 4, welche durch eine Kupplungsvorrichtung 6, welche eine formschlüssige Verbindung (in der vorliegenden Darstellung nicht erkennbar) zur Drehmomentübertragung zwischen der Rotortasse 2 und dem Rotorschaft 4 beinhaltet, sowie einen Permanentmagneten 7 zur axialen Verbindung von Rotorschaft 4 und Rotortasse 2. Die formschlüssige Verbindung zur Drehmomentübertragung ist dabei direkt an dem Rotorschaft 4 bzw. der Rotortasse 2 ausgebildet, so dass diese in besonders vorteilhafter Weise ohne zusätzliche Bauteile direkt miteinander verbunden sind. Der Rotorschaft 4 beinhaltet dabei einen Vorsprung 8 mit wenigstens einem drehmomentübertragenden Bereich 9 (siehe beispielsweise Figur 2). Ebenso ist an der Rotortasse 2 eine zu dem Vorsprung 8 korrespondierende Ausnehmung 10 in der Rotortasse 2 mit wenigstens einem drehmomentübertragenden Gegenbereich 11 (siehe Figuren 3 und 4) angeordnet. Der Vorsprung 8 greift in die korrespondierende Ausnehmung 10 der Rotortasse 2 ein und bildet hierdurch die formschlüssige Verbindung zur Drehmomentübertragung.The open-end spinning rotor 1 includes a rotor cup 2 and a rotor shaft 4, which by a coupling device 6, which includes a positive connection (not visible in the present illustration) for transmitting torque between the rotor cup 2 and the rotor shaft 4, and a permanent magnet 7 for axial Connection of rotor shaft 4 and rotor cup 2. The positive connection for torque transmission is formed directly on the rotor shaft 4 and the rotor cup 2, so that they are connected directly to each other in a particularly advantageous manner without additional components. The rotor shaft 4 includes a projection 8 with at least one torque-transmitting region 9 (see, for example FIG. 2 ). Likewise, at the rotor cup 2 a corresponding to the projection 8 recess 10 in the rotor cup 2 with at least one torque-transmitting counter region 11 (see FIGS. 3 and 4 ) arranged. The projection 8 engages in the corresponding recess 10 of the rotor cup 2 and thereby forms the positive connection for torque transmission.

Nach der vorliegenden Darstellung ist die Rotortasse 2 mit einer Durchgangsbohrung 14 versehen, welche zugleich die Ausnehmung 10 für den Vorsprung 8 sowie eine Aufnahme 12 für den Permanentmagneten 7 ausbildet. Diese Ausführung ist in besonders einfacher Weise herstellbar und ermöglicht zudem eine einfache Montage und einen einfachen Ein- und Ausbau des Permanentmagneten 7. Besonders vorteilhaft ist es auch, dass durch die Durchgangsbohrung 14 die Kupplungsvorrichtung 6 wenig anfällig gegen Verschmutzungen wie Faseranhaftungen ist bzw. diese in einfacher Weise durch die Durchgangsbohrung 14 wieder entfernt werden können.According to the present illustration, the rotor cup 2 is provided with a through hole 14, which at the same time forms the recess 10 for the projection 8 and a receptacle 12 for the permanent magnet 7. This embodiment can be produced in a particularly simple manner and also allows easy installation and easy installation and removal of the permanent magnet 7. It is also particularly advantageous that through the through hole 14, the coupling device 6 is less susceptible to contamination such as fiber adhesions or this in easy way through the through hole 14 can be removed again.

Die Durchgangsbohrung 14 kann als zylindrische Bohrung ausgeführt werden, so dass sie zugleich der Zentrierung von Rotortasse 2 auf dem Rotorschaft 4 dienen kann. Der Vorsprung 8 des Rotorschafts 4 ist daher überwiegend ebenfalls zylindrisch ausgebildet. Der zylindrische Vorsprung 8 reicht dabei bis in den Massenschwerpunkt der Rotortasse 2 hinein, wodurch eine besonders gute Zentrierung erfolgen kann.The through hole 14 can be designed as a cylindrical bore, so that it can serve at the same time the centering of the rotor cup 2 on the rotor shaft 4. The projection 8 of the rotor shaft 4 is therefore also predominantly cylindrical. The cylindrical projection 8 extends into the center of mass of the rotor cup 2, whereby a particularly good centering can take place.

Wie der Figur 1 entnehmbar, weist dabei die Ausnehmung 10 der Rotortasse 2 einen ersten Abschnitt 10a auf, der vorliegend zylindrisch ausgebildet ist, sowie einen zweiten Abschnitt 10b, der den wenigstens einen drehmomentübertragenden Gegenbereich 11 beinhaltet. Ebenso weist der Rotorschaft 4 nach der vorliegenden Darstellung einen ersten Abschnitt 8a auf, welcher zylindrisch ist, sowie einen zweiten Abschnitt 8b, welcher dem der Rotortasse abgewandten Schaftende zugewandt ist, und welcher einen oder mehrere drehmomentübertragende Bereiche 9, welche als Flächen oder Kanten ausgebildet sein können, beinhaltet.Again FIG. 1 Removable, while the recess 10 of the rotor cup 2 has a first portion 10a, which is cylindrical in the present case, and a second portion 10b, which includes the at least one torque-transmitting counter region 11. Likewise, the rotor shaft 4 according to the present illustration on a first portion 8a, which is cylindrical, and a second portion 8b, which faces the shaft end facing away from the rotor end, and one or more torque transmitting areas 9, which are formed as surfaces or edges can, includes.

Während es für den ersten Abschnitt 10a der Ausnehmung 10 sowie für den ersten Abschnitt 8a des Vorsprungs 8 vorteilhaft ist, diese zylindrisch auszubilden, können der zweite Abschnitt 8b des Vorsprungs 8 bzw. der zweite Abschnitt 10b der Ausnehmung 10 unterschiedliche Konturen aufweisen, um eine oder mehrere drehmomentübertragende Flächen bzw. Bereiche 9 bereitzustellen. Vorteilhaft ist es dabei, wenn der zweite Abschnitt 10b bzw. der zweite Abschnitt 8b bezogen auf die Längsachse des Spinnrotors möglichst kurz ausgebildet sind, um Unwuchten im Betrieb zu vermeiden.While it is advantageous for the first portion 10 a of the recess 10 and for the first portion 8 a of the projection 8 to form them cylindrically, the second portion 8 b of the projection 8 and the second portion 10 b of the recess 10 may have different contours to one or provide multiple torque transmitting surfaces or areas 9. It is advantageous if the second portion 10b and the second portion 8b are formed as short as possible relative to the longitudinal axis of the spinning rotor to avoid imbalances during operation.

Figur 2 zeigt eine erste Ausführung eines Vorsprungs 8 an einem Rotorschaft 4 mit einem ersten Abschnitt 8a und einem zweiten Abschnitt 8b. Der erste Abschnitt 8a ist wie zuvor beschrieben zylindrisch ausgebildet, während der zweite Abschnitt 8b eine Schlüsselweite 13 beinhaltet. Der zweite Abschnitt 8b stellt dabei zwei einander gegenüberliegende drehmomentübertragende Bereiche 9 bereit. FIG. 2 shows a first embodiment of a projection 8 on a rotor shaft 4 with a first portion 8a and a second portion 8b. The first portion 8a is cylindrical as described above, while the second portion 8b includes a spanner width 13. The second section 8b provides two opposing torque-transmitting regions 9 ready.

Figur 3 zeigt eine Rotortasse 2, welche mit dem Rotorschaft 4 der Figur 2 zu einem Offenend-Spinnrotor 1 montiert werden kann, und welche eine Ausnehmung 10 mit einem ersten Abschnitt 10a und einen zweiten Abschnitt 10b aufweist. Der erste Abschnitt 10a ist dabei korrespondierend zu dem Vorsprung 8a als zylindrische Bohrung ausgebildet. Wie zu Figur 1 beschrieben, kann dabei die zylindrische Bohrung als Durchgangsbohrung 14 ausgebildet sein und die Aufnahme 12 für den Permanentmagneten beinhalten. Ebenso kann der erste Abschnitt 10a jedoch auch als Sackloch ausgebildet sein. Der zweite Abschnitt 10b ist vorliegend als Nut 20 ausgebildet und stellt zwei drehmomentübertragende Flächen bzw. Gegenbereiche 11 bereit, welche mit der Schlüsselweite 13 des Vorsprungs 8 der Figur 2 zusammenwirken können. Der nutförmige, zweite Abschnitt 10b ist dabei fertigungstechnisch günstig rückseitig der Öffnung der Rotortasse 2 am Bund 3 der Rotortasse 2 angeordnet. FIG. 3 shows a rotor cup 2, which with the rotor shaft 4 of FIG. 2 can be mounted to an open-end spinning rotor 1, and which has a recess 10 with a first portion 10a and a second portion 10b. The first portion 10a is formed corresponding to the projection 8a as a cylindrical bore. How to FIG. 1 described, while the cylindrical bore may be formed as a through hole 14 and include the receptacle 12 for the permanent magnet. Likewise, however, the first portion 10a may also be formed as a blind hole. The second portion 10b is presently formed as a groove 20 and provides two torque-transmitting surfaces or counter-regions 11 which, with the key width 13 of the projection 8 of FIG. 2 can interact. The groove-shaped, second portion 10b is in this case production engineering low back of the opening of the rotor cup 2 on the collar 3 of the rotor cup 2 arranged.

Figur 4 zeigt eine alternative Ausführung einer Rotortasse 2, die ebenso wie die in Figur 3 gezeigte Ausnehmung 10 einem ersten Abschnitt 10a und einen zweiten Abschnitt 10b aufweist. Im Unterschied zur Darstellung der Figur 3 ist der zweite Abschnitt 10b als sich über die gesamte Breite des Bundes 3 der Rotortasse 2 erstreckende Nut 20 ausgeführt, welche ebenfalls zwei drehmomentübertragende Gegenbereiche 11 beinhaltet. Eine derartige Ausnehmung 10 kann in besonders einfacher Weise gefertigt werden. FIG. 4 shows an alternative embodiment of a rotor cup 2, as well as in FIG. 3 shown recess 10 has a first portion 10a and a second portion 10b. In contrast to the representation of the FIG. 3 the second portion 10b is designed as over the entire width of the collar 3 of the rotor cup 2 extending groove 20, which also two torque-transmitting counter regions 11 includes. Such a recess 10 can be made in a particularly simple manner.

Figur 5 zeigt eine andere Ausführung eines Rotorschafts 4 mit einem in einen ersten Abschnitt 8a und einen zweiten Abschnitt 8b untergliederten Vorsprung. Der erste Abschnitt 8a ist wiederum zylindrisch ausgebildet, während der zweite Abschnitt 8b eine elliptische Außenkontur aufweist, deren Umfangsfläche den wenigstens einen drehmomentübertragenden Bereich 9 bildet. Die Rotortasse 2 (hier nicht dargestellt) beinhaltet in diesem Fall ähnlich wie die in Figur 3 dargestellte eine Ausnehmung 10 mit einem ersten Abschnitt 10a, der zylindrisch ausgeführt ist und einen zweiten Abschnitt 10b, der ähnlich der Darstellung der Figur 3 elliptisch ausgeführt ist. FIG. 5 shows another embodiment of a rotor shaft 4 with a in a first portion 8a and a second portion 8b sub-projection. The first section 8a is in turn cylindrically shaped, while the second section 8b has an elliptical outer contour whose peripheral surface forms the at least one torque-transmitting region 9. The rotor cup 2 (not shown here) in this case includes similar to those in FIG. 3 5 shows a recess 10 with a first portion 10a, which is cylindrical and a second portion 10b, which is similar to the representation of FIG. 3 elliptical is executed.

Es liegt dabei auf der Hand, dass bezüglich der Ausbildung des zweiten Abschnitts 8b des Vorsprungs 8 bzw. des zweiten Abschnitts 10b der Ausnehmung 10 zahlreiche Abwandlungen möglich sind. So kann der zweite Abschnitt 8b des Vorsprungs 8 auch einen Vierkant oder ein Oval (ähnlich der in Figur 3 gezeigten Form) oder einen Mehrkant beinhalten. Weiterhin ist es beispielsweise in Abwandlung der Figur 2 auch möglich, anstelle einer Schlüsselweite 13 lediglich eine Seite des zweiten Abschnitts 8b des Vorsprungs 8 abzuflachen, so dass ebenfalls nur ein drehmomentübertragender Bereich 9 zur Verfügung steht.It is obvious that with respect to the formation of the second portion 8b of the projection 8 and the second portion 10b of the recess 10 numerous modifications are possible. Thus, the second portion 8b of the projection 8 may also have a square or an oval (similar to that in FIG FIG. 3 shown form) or a polygon. Furthermore, it is for example in a modification of FIG. 2 also possible, instead of flattening a key width 13, only one side of the second section 8b of the projection 8 to flatten, so that likewise only one torque-transmitting region 9 is available.

Figur 6 zeigt eine weitere Ausführung der Erfindung, bei welcher ein Vorsprung 8 an einem Rotorschaft 4 jedoch nur einen einzigen Abschnitt aufweist. Der Vorsprung 8 ist nach vorliegender Darstellung elliptisch ausgebildet und greift in eine nicht dargestellte elliptische Bohrung einer Rotortasse 2, welche beispielsweise durch Fräsen hergestellt werden kann, ein. Es ist somit auch bei dem Vorsprung der Figur 6 nur ein einziger drehmomentübertragender Bereich 9 vorgesehen. Der Vorsprung 8 des Rotorschafts 4 kann natürlich abweichend von der gezeigten Darstellung auch eine ovale Form besitzen. FIG. 6 shows a further embodiment of the invention, in which a projection 8 on a rotor shaft 4, however, has only a single portion. The projection 8 is elliptical in the present representation and engages in an elliptical hole, not shown, a rotor cup 2, which can be produced for example by milling, a. It is thus also in the lead of FIG. 6 only a single torque-transmitting area 9 is provided. The projection 8 of the rotor shaft 4 may, of course, deviating from the illustration shown also have an oval shape.

Figur 7 zeigt eine Rotortasse 2 mit einem Teil des Rotorschafts 4 in einer Detaildarstellung. Wie der Figur 7 entnehmbar, weisen dabei die Rotortasse 2 wie der Rotorschaft 4 jeweils eine axiale Anschlagfläche 16 auf, so dass bei der Montage des Offenend-Spinnrotors nach Erreichen der Anschlagflächen 16 die Rotortasse 2 in Bezug auf den Rotorschaft 4 automatisch in axialer Richtung korrekt positioniert ist. Auch nach der Darstellung der Figur 7 ist der Permanentmagnet in einer Aufnahme 12 angeordnet, welche durch eine Durchgangsbohrung 14 der Rotortasse 2 gebildet ist. Das der Rotortasse 2 zugewandte Ende des Rotorschafts 4 bildet dabei eine Positionierfläche 17 für den Permanentmagneten 7 aus, so dass dieser nach erfolgter Montage des Offenend-Spinnrotor 1 ebenfalls nur noch in die Durchgangsbohrung 14 bzw. seine Aufnahme 12 eingedrückt oder eingeclipst werden muss und in axialer Richtung automatisch positioniert ist. FIG. 7 shows a rotor cup 2 with a part of the rotor shaft 4 in a detailed view. Again FIG. 7 Removable, while the rotor cup 2 as the rotor shaft 4 each have an axial stop surface 16, so that in the assembly of the open-end spinning rotor after reaching the stop surfaces 16, the rotor cup 2 is automatically positioned correctly in the axial direction with respect to the rotor shaft 4. Even after the presentation of FIG. 7 the permanent magnet is arranged in a receptacle 12, which is formed by a through hole 14 of the rotor cup 2. The rotor cup 2 facing the end of the rotor shaft 4 forms a positioning surface 17 for the permanent magnet 7, so that after the assembly of the open-end spinning rotor 1 also only in the through hole 14 and its recording 12 must be pressed or clipped and in axial direction is automatically positioned.

Die Aufnahme 12 für den Permanentmagneten 7 beinhaltet nach der vorliegenden Darstellung eine Umfangsnut 18. Beinhaltet der Permanentmagnet 7 einen Kunststoffüberzug 15, so kann durch Verformung des elastischen Kunststoffüberzugs 15 ein ausreichender Halt des Permanentmagneten 7 bereits durch einfaches Eindrücken die Aufnahme 12 erreicht werden. Durch Verformung des Kunststoffüberzugs 15 ergibt sich dabei ein teilweise auch formschlüssiger Halt.The receptacle 12 for the permanent magnet 7 includes the present illustration, a circumferential groove 18. If the permanent magnet 7 includes a plastic coating 15, so by deformation of the elastic plastic coating 15 sufficient retention of the permanent magnet 7 already by simply pressing the receptacle 12 can be achieved. By deformation of the plastic coating 15 results in a partially positive fit.

Anstelle des Kunststoffüberzugs 15 kann der Permanentmagnet 7 jedoch auch mit einer speziellen, nicht dargestellten Halterung, beispielsweise einer metallischen Fassung, versehen sein, mittels welcher er in die Aufnahme 12 einclipsbar ist.Instead of the plastic coating 15, however, the permanent magnet 7 may also be provided with a special holder (not shown), for example a metallic holder, by means of which it can be clipped into the receptacle 12.

Nach einer anderen Ausführung der Erfindung, wie sie in den Figuren 8 und 9 gezeigt ist, ist im Bund 3 der Rotortasse 2 ein Ringmagnet als Permanentmagnet 7 angeordnet. Die Rotortasse 2 ist hierzu mit einer als Stufenbohrung ausgebildeten Durchgangsbohrung 14 versehen, wobei nach den vorliegenden Darstellungen der größere Durchmesser der Stufenbohrung die Aufnahme 12 für den ringförmigen Permanentmagnet 7 bildet. Vorzugsweise ist dabei, wie in Figur 8 und 9 dargestellt, der Ringmagnet von der Seite des Bundes 3 her in die Rotortasse 2 eingesetzt. Der Permanentmagnet 7 kann bei dieser Ausführung etwas größer ausgebildet sein als bei der Anordnung der Figur 7, so dass sich ein besonders guter axialer Halt ergibt. Vorzugsweise bildet der Ringmagnet zugleich zumindest teilweise den ersten Abschnitt 10a der Ausnehmung 10 in der Rotortasse, in welcher der Vorsprung 8 bzw. der zweite Abschnitt 8b des Vorsprungs 8 des Rotorschafts 4 festlegbar ist. Der Ringmagnet ist dann direkt hinter dem die drehmomentübertragenden Gegenbereiche 11 ausbildenden zweiten Abschnitt 10b der Ausnehmung 10 angeordnet.According to another embodiment of the invention, as in the FIGS. 8 and 9 is shown, a ring magnet is arranged as a permanent magnet 7 in the collar 3 of the rotor cup 2. The rotor cup 2 is for this purpose provided with a stepped bore formed as a through hole 14, wherein according to the present Representations of the larger diameter of the stepped bore forms the receptacle 12 for the annular permanent magnet 7. Preferably, as in FIGS. 8 and 9 shown, the ring magnet inserted from the side of the collar 3 ago in the rotor cup 2. The permanent magnet 7 may be slightly larger in this embodiment than in the arrangement of FIG. 7 , so that there is a particularly good axial grip. Preferably, the ring magnet also forms at least partially the first portion 10a of the recess 10 in the rotor cup, in which the projection 8 and the second portion 8b of the projection 8 of the rotor shaft 4 can be fixed. The ring magnet is then arranged directly behind the torque-transmitting counter regions 11 forming the second portion 10 b of the recess 10.

Nach Figur 8 beinhaltet dabei der zweite Abschnitt 10b der Ausnehmung 10 der Rotortasse 2 eine Nut 20 wie in Figur 3 gezeigt, wobei jedoch die drehmomentübertragenden Gegenbereiche 11 durch die Aufnahme 12 für den Permanentmagneten 7 unterbrochen sind, so dass vorliegend dann vier drehmomentübertragende Gegenbereiche 11 ausgebildet sind. Der Vorsprung 8 des Rotorschafts 4 entspricht für diese Ausführung dem in Figur 2 gezeigten.To FIG. 8 In this case, the second portion 10b of the recess 10 of the rotor cup 2 includes a groove 20 as in FIG. 3 shown, wherein, however, the torque-transmitting counter regions 11 are interrupted by the receptacle 12 for the permanent magnet 7, so that in the present case four torque-transmitting counter regions 11 are formed. The projection 8 of the rotor shaft 4 corresponds to the in FIG. 2 shown.

In Figur 9 ist ebenfalls ein Ringmagnet als Permanentmagnet 7 gezeigt, der zweite Abschnitt 10b der Ausnehmung 10 der Rotortasse 2 ist dabei jedoch in Form eines abgerundeten Polygon, hier eines abgerundeten Dreiecks, ausgebildet. Vorteilhaft bei dieser Ausführung ist es, dass mehrere, hier drei, Positionen zur Montage des Rotorschaftes 4 in die Rotortasse 2 zur Verfügung stehen. Auch die Herstellung eines derartigen abgerundeten Polygons ist durch Fräsen problemlos sowohl für die Ausnehmung 10 als auch für den Vorspruch 8 möglich. Es wäre daher abweichend von der gezeigten Darstellung auch möglich, die gesamte Ausnehmung 10 bzw. den gesamten Vorsprung 8 derart polygonal auszuführen, ähnlich der in Figur 6 gezeigten Ausführung. Der Permanentmagnet 7 wäre dann wiederum in axialer Verlängerung des Vorsprungs 8 angeordnet.In FIG. 9 a ring magnet is also shown as a permanent magnet 7, the second portion 10b of the recess 10 of the rotor cup 2 is in the form of a rounded polygon, here a rounded triangle formed. An advantage of this embodiment is that several, here three, positions for mounting the rotor shaft 4 in the rotor cup 2 are available. The production of such a rounded polygon is easily possible by milling both for the recess 10 and for the projection 8. It would therefore deviating from the representation shown also possible to perform the entire recess 10 and the entire projection 8 so polygonal, similar to the in FIG. 6 shown execution. The permanent magnet 7 would then in turn be arranged in the axial extension of the projection 8.

Vorteilhaft bei beiden Ausführungsformen der Figur 8 und 9 mit einer Durchgangsbohrung 14 ist es wiederum, dass die Bohrung an der Rotortasse 2 zum Rotorboden 19 hin offen ist und daher eventuelle Verunreinigungen nicht an der Kupplungseinrichtung 5 zwischen dem Vorsprung 8 des Rotorschafts und dem Ringmagneten haften bleiben, sondern durch die Durchgangsbohrung 14 abgeführt werden können. Weiterhin kann die Rotortasse 2 kürzer ausgeführt werden, als bei einer Ausführung, bei welcher der Permanentmagnet 7 in axialer Verlängerung des Vorsprungs 8 angeordnet ist.Advantageous in both embodiments of FIGS. 8 and 9 with a through hole 14, it is again that the hole on the rotor cup 2 to the rotor bottom 19 is open and therefore any impurities do not adhere to the coupling device 5 between the projection 8 of the rotor shaft and the ring magnet, but can be removed through the through hole 14 , Furthermore, the rotor cup 2 can be made shorter than in an embodiment in which the permanent magnet 7 is arranged in the axial extension of the projection 8.

Eine weitere Ausführungsform einer Kupplungsvorrichtung 6 ist in Fig. 10 gezeigt. Die Rotortasse 2 kann ebenso wie die der Figur 1 mit einer Durchgangsbohrung 14 versehen sein, welche die Aufnahme 12 (nicht sichtbar) für den Permanentmagneten 7 (ebenfalls nicht sichtbar) ausbilden kann. Ebenso dient auch hier die Durchgangsbohrung 14 zugleich der Zentrierung der Rotortasse 2 zu dem Rotorschaft 4 mittels des Vorsprungs 8 bzw. des ersten Abschnitts 8a des Vorsprungs 8. Ebenso wie beispielsweise die Rotortassen der Figuren 1 und 3 weist hierdurch auch die Ausnehmung 10 der Rotortasse 2 einen ersten Abschnitt 10a auf, der vorliegend durch die Durchgangsbohrung 14 zylindrisch ausgebildet ist, sowie einen zweiten Abschnitt 10b, der den wenigstens einen drehmomentübertragenden Gegenbereich 11 beinhaltet. Natürlich könnte auch bei dieser Ausführung der erste Abschnitt 10a anstelle der Durchgangsbohrung 14 als Sackloch ausgebildet sein, um den Permanentmagneten 7 aufzunehmen und den Rotorschaft 4 zu zentrieren.Another embodiment of a coupling device 6 is shown in FIG Fig. 10 shown. The rotor cup 2 can as well as the FIG. 1 be provided with a through hole 14, which can form the receptacle 12 (not visible) for the permanent magnet 7 (also not visible). Likewise, the through hole 14 at the same time also serves to center the rotor cup 2 to the rotor shaft 4 by means of the projection 8 or the first portion 8a of the projection 8. Like the rotor cups of the FIGS. 1 and 3 As a result, the recess 10 of the rotor cup 2 also has a first portion 10a, which is cylindrical in the present case through the through-bore 14, and a second portion 10b, which contains the at least one torque-transmitting counter-region 11. Of course, also in this embodiment, the first portion 10a may be formed instead of the through hole 14 as a blind hole to receive the permanent magnet 7 and to center the rotor shaft 4.

Der zweite Abschnitt 10b der Ausnehmung 10 der Rotortasse beinhaltet vorliegend mehrere Nuten 20, welche vorliegend jeweils in einem 30°-Winkel zueinander angeordnet sind und welche jeweils wenigstens einen drehmomentübertragenden Bereich 9 aufweisen. Diese Nuten 20 können in einfacher Weise radial mittels eines Fräsers eingebracht werden. In ähnlicher Weise beinhaltet der zweite Abschnitt 8b des Vorsprungs 8 des Rotorschafts 4 mehrere Nuten 20, welche vorliegend ebenfalls in einem 30°-Winkel zueinander angeordnet sind und welche jeweils wenigstens einen drehmomentübertragenden Bereich 9 beinhalten. Die Nuten 20 erstrecken sich dabei jeweils über die gesamte Breite des Bundes 3 der Rotortasse 2, so dass die Herstellung weiterhin vereinfacht ist.The second section 10b of the recess 10 of the rotor cup includes in the present case a plurality of grooves 20, which in the present case are each arranged at a 30 ° angle to each other and which each have at least one torque-transmitting region 9. These grooves 20 can be introduced radially by means of a milling cutter in a simple manner. In similar The second section 8b of the projection 8 of the rotor shaft 4 includes a plurality of grooves 20, which in the present case are likewise arranged at a 30 ° angle to one another and which each include at least one torque-transmitting region 9. The grooves 20 each extend over the entire width of the collar 3 of the rotor cup 2, so that the production is further simplified.

Vorteilhaft bei einer derartigen Ausführung mit mehreren Nuten 20 ist es, dass bei der Montage der Rotortasse 2 auf den Rotorschaft 4 die Rotortasse nur jeweils gering verdreht werden muss, bis der Vorsprung 8 bzw. die mehreren den Vorsprung 8 bildenden, zwischen den Nuten 20 verbleibenden Erhebungen in die Nuten 20 der Ausnehmung 10 der Rotortasse 2 eingreifen. Es ist jedoch auch bei dieser Ausführungsform möglich, nur eine oder zwei Nuten 20 an der Rotortasse 2 vorzusehen und am Rotorschaft dann dazu korrespondierende Stege als Vorsprünge bzw. Vorsprünge 8 durch Fräsen zu erzeugen. Weiterhin ist es auch möglich, mehr als drei Nuten 20 vorzusehen.An advantage of such a design with a plurality of grooves 20 is that during assembly of the rotor cup 2 on the rotor shaft 4, the rotor cup only needs to be slightly rotated, until the projection 8 and the plurality of projection 8 forming, remaining between the grooves 20 Elevations in the grooves 20 of the recess 10 of the rotor cup 2 engage. However, it is also possible in this embodiment, only one or two grooves 20 provided on the rotor cup 2 and then on the rotor shaft corresponding webs to produce as projections or projections 8 by milling. Furthermore, it is also possible to provide more than three grooves 20.

Die drehmomentübertragenden Bereiche 9 des Vorsprungs 8 sowie die drehmomentübertragenden Gegenbereiche 11 der Ausnehmung 10 können dabei je nach Ausführung der Nuten 20 durch die Seitenflächen der Nuten 20 oder auch lediglich durch Abschlusskanten der Nuten 20 ausgebildet werden.Depending on the design of the grooves 20, the torque-transmitting regions 9 of the projection 8 and the torque-transmitting counter regions 11 of the recess 10 can be formed by the side surfaces of the grooves 20 or only by the end edges of the grooves 20.

Weiterhin kann auch bei dieser Ausführung eine axiale Anschlagfläche 16 sowie eine Positionierfläche 17 für den Permanentmagneten 7 wie zu Fig. 7 beschrieben ausgeführt sein, so dass auf die dortigen Ausführungen verwiesen wird.Furthermore, in this embodiment, an axial stop surface 16 and a positioning surface 17 for the permanent magnet 7 as to Fig. 7 be described described, so that reference is made to the statements there.

Die Erfindung ist nicht auf die in den Ausführungsbeispielen gezeigten Darstellungen beschränkt. Insbesondere können anstatt eines Vorsprungs und einer Ausnehmung, wie in den Ausführungsbeispielen überwiegend dargestellt, auch mehrere Vorsprünge an dem Rotorschaft angeordnet sein, die entsprechend mit mehreren Ausnehmungen an der Rotortasse zusammenwirken. Weitere Abwandlungen und Kombinationen im Rahmen der Patentansprüche, soweit technisch möglich und sinnvoll, fallen ebenfalls unter die Erfindung.The invention is not limited to the illustrations shown in the embodiments. In particular, instead of a projection and a recess, as shown predominantly in the exemplary embodiments, a plurality of projections may also be arranged on the rotor shaft, which correspondingly cooperate with a plurality of recesses on the rotor cup. Further modifications and combinations within the scope of the claims, as far as technically possible and reasonable, also fall under the invention.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Offenend-SpinnrotorOpen-end spinning rotor
22
Rotortasserotor cup
33
Bund der RotortasseBund the rotor cup
44
Rotorschaftrotor shaft
55
Lagerungstorage
66
Kupplungsvorrichtungcoupling device
77
Permanentmagnetpermanent magnet
88th
Vorsprung
  • 8a erster Abschnitt
  • 8b zweiter Abschnitt
head Start
  • 8a first section
  • 8b second section
99
drehmomentübertragender Bereichtorque transmitting area
1010
Ausnehmung
  • 10a erster Abschnitt
  • 10b zweiter Abschnitt
recess
  • 10a first section
  • 10b second section
1111
drehmomentübertragender Gegenbereichtorque transmitting counter area
1212
Aufnahme für PermanentmagnetenHolder for permanent magnets
1313
SchlüsselweiteKey-width
1414
DurchgangsbohrungThrough Hole
1515
KunststoffüberzugPlastic coating
1616
Anschlagflächestop surface
1717
Positionierflächepositioning
1818
Umfangsnutcircumferential groove
1919
Rotorbodenrotor base
2020
Nutgroove

Claims (17)

  1. Open-end spinning rotor (1) with a rotor cup (2), in which a fiber material is able to be spun, and with a rotor shaft (4), through which the spinning rotor (1) is able to be supported in a bearing (5), in particular a magnetic bearing, whereas the rotor shaft (4) and the rotor cup (2) are detachably connected to each other through a coupling device (5), and whereas the coupling device (5) includes a positive-locking connection for the transmission of the turning moment between the rotor cup (2) and the rotor shaft (4) along with a permanent magnet (7) for the axial connection of the rotor shaft (4) and the rotor cup (2), characterized in that the rotor shaft (4) features at least one projection (8) with at least one turning moment-transmitting area (9) as a coupling device (5), which at least one projection (8) engages in at least one recess (10) of the rotor cup (2) corresponding to it with at least one turning moment-transmitting counter-area (11) whereas the at least one projection (8) comprises a first section (8a) turned towards the rotor cup (2) and a second section (8b) turned towards its shaft end, which is turned away from the rotor cup (2), which second section (8b) includes the at least one turning moment-transmitting area (9), and whereas the at least one recess (10) includes a first section (10a), in which the first section (8a) of the projection (8) of the rotor shaft (4) engages, and a second section (10b) which includes the at least one turning moment-transmitting counter-area (11) and which cooperates in conjunction with the second section (8b) of the projection (8) of the rotor shaft (4), and that, a socket (12) for a permanent magnet (7) is arranged on the rotor cup (2), in particular in the bottom (19) of the rotor cup (2).
  2. Open-end spinning rotor according to the preceding claim, characterized in that the socket (12) for the permanent magnet (7) is arranged in an axial extension of the at least one recess (10) for the projection (8) of the rotor shaft (4).
  3. Open-end spinning rotor according to one of the preceding claims, characterized in that the permanent magnet (7) is formed as a ring magnet.
  4. Open-end spinning rotor according to one of the preceding claims, characterized in that the socket (12) for the permanent magnet (7) is formed by a bore hole.
  5. Open-end spinning rotor according to one of the preceding claims, characterized in that the at least one projection (8) of the rotor shaft (4) features a cylindrical outer contour at least at its end turned towards the rotor cup (2).
  6. Open-end spinning rotor according to one of the preceding claims, characterized in that the at least one projection (8) of the rotor shaft (4) features an elliptical or oval outer contour, at least in sections.
  7. Open-end spinning rotor according to one of the preceding claims, characterized in that the at least one projection (8) or the second section (8b) of the at least one projection (8) of the rotor shaft (4) features at least one groove (20), which includes the at least one turning moment-transmitting area (9).
  8. Open-end spinning rotor according to one of the two preceding claims, characterized in that the second section (8b) includes a width across flats (13) or an elliptical or an oval outer contour.
  9. Open-end spinning rotor according to one of the three preceding claims, characterized in that the first section (8a) features a cylindrical outer contour.
  10. Open-end spinning rotor according to one of the preceding claims, characterized in that the at least one recess (10) of the rotor cup (2) includes a through hole (14), in particular a cylindrical through hole (14), and that, preferably, the socket (12) for the permanent magnet (7) is formed by the cylindrical through hole (14).
  11. Open-end spinning rotor according to one of the preceding claims, characterized in that the first section (10a) of the at least one recess (10) is cylindrical.
  12. Open-end spinning rotor according to the preceding claim, characterized in that the second section (10b) of the recess (10) is arranged on the truss (3) of the rotor cup (2).
  13. Open-end spinning rotor according to the preceding claim, characterized in that the recess (10) or the second section (10b) of the recess (10) includes at least one groove (20), which preferably extends across the entire width of the truss (3).
  14. Open-end spinning rotor according to one of the preceding claims, characterized in that the permanent magnet (7) can be clipped into the socket (12), in particular into the through hole (14).
  15. Open-end spinning rotor according to one of the preceding claims, characterized in that the permanent magnet (7) features a plastic lining cover (15) and is preferably able to be fixed by means of the plastic lining cover (15) in the socket (12).
  16. Open-end spinning rotor according to one of the preceding claims, characterized in that the rotor shaft (4) and/or the rotor cup (2) features a stop surface (16) for the axial positioning of the rotor shaft (4) in relation to the rotor cup (2).
  17. Open-end spinning rotor according to one of the preceding claims, characterized in that the rotor shaft (4), at least in the area of its projection (8), consists of a ferromagnetic material.
EP14175954.8A 2013-07-31 2014-07-07 Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device Active EP2832903B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16201925.1A EP3153611B1 (en) 2013-07-31 2014-07-07 Rotor cup for an open-end spinning rotor with a coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013108199.1A DE102013108199A1 (en) 2013-07-31 2013-07-31 Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP16201925.1A Division EP3153611B1 (en) 2013-07-31 2014-07-07 Rotor cup for an open-end spinning rotor with a coupling device

Publications (2)

Publication Number Publication Date
EP2832903A1 EP2832903A1 (en) 2015-02-04
EP2832903B1 true EP2832903B1 (en) 2016-12-07

Family

ID=51063338

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16201925.1A Active EP3153611B1 (en) 2013-07-31 2014-07-07 Rotor cup for an open-end spinning rotor with a coupling device
EP14175954.8A Active EP2832903B1 (en) 2013-07-31 2014-07-07 Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16201925.1A Active EP3153611B1 (en) 2013-07-31 2014-07-07 Rotor cup for an open-end spinning rotor with a coupling device

Country Status (5)

Country Link
US (1) US9689090B2 (en)
EP (2) EP3153611B1 (en)
CN (2) CN104342793B (en)
BR (1) BR102014018554B1 (en)
DE (1) DE102013108199A1 (en)

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DE102016122595A1 (en) * 2016-11-23 2018-05-24 Maschinenfabrik Rieter Ag Rotor cup and open-end spinning rotor with a rotor cup
DE102017129152A1 (en) * 2017-12-07 2019-06-13 Maschinenfabrik Rieter Ag Opening roller for an open-end spinning device and open-end spinning device

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Also Published As

Publication number Publication date
CN104342793B (en) 2018-09-18
EP3153611A1 (en) 2017-04-12
CN108823700A (en) 2018-11-16
CN108823700B (en) 2021-03-26
US9689090B2 (en) 2017-06-27
EP3153611B1 (en) 2020-10-14
CN104342793A (en) 2015-02-11
BR102014018554B1 (en) 2022-01-25
US20150033695A1 (en) 2015-02-05
DE102013108199A1 (en) 2015-02-05
EP2832903A1 (en) 2015-02-04
BR102014018554A2 (en) 2015-12-08

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