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

Patent metadata

Field	Value
Publication number	US-9689090-B2
Application number	US-201414446956-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Jul 31, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

In an open-end spinning rotor with a rotor cup, and with a rotor shaft, through which the spinning rotor is supported in a bearing, the rotor shaft and the rotor cup are detachably connected to each other through a coupling device. The coupling device includes a positive-locking connection for the transmission of the turning moment between the rotor cup and the rotor shaft, along with a magnetic device for the axial connection of the rotor shaft and the rotor cup. The rotor shaft features at least one projection with a one turning moment-transmitting area, which engages in a recess of the rotor cup with a turning moment-transmitting counter-area. A socket for a permanent magnet is arranged on the rotor cup.

First claim

The invention claimed is:

1. An open-end spinning rotor, comprising:
a rotor cup;
a rotor shaft;
a coupling device configured between the rotor cup and the rotor shaft such that transmits a turning moment from the rotor shaft to the rotor cup and detachably connects the rotor shaft and the rotor cup;
a magnetic axial coupling between the rotor cup and the rotor shaft;
the rotor shaft comprising a projection with a turning moment transmitting area defined thereon;
the rotor cup comprising a recess with a shape corresponding to the projection and a turning moment transmitting counter-area defined therein, wherein the projection fits into the recess for detachably coupling the rotor shaft and the rotor cup;
a socket defined in a bottom or within a truss of the rotor cup for receipt of a permanent magnet component of the magnetic axial coupling; and
wherein the projection comprises first section at an end towards the rotor cup, and a second section axially aligned with the first section, the turning moment transmitting area defined in the second section.

2. The open-end spinning rotor as in claim 1 , wherein the socket is defined as an axial extension of the recess.

3. The open-end spinning rotor as in claim 1 , wherein the permanent magnet is a ring magnet.

4. The open-end spinning rotor as in claim 1 , wherein the socket is formed by a bore hole in the rotor bottom.

5. The open-end spinning rotor as in claim 1 , wherein the projection comprises a cylindrical outer contour at the first section.

6. The open-end spinning rotor as in claim 1 , wherein the projection comprises one of an elliptical or oval outer contour at the second section.

7. The open-end spinning rotor as in claim 1 , wherein the turning moment transmitting area is formed by a groove defined in the second section.

8. The open-end spinning rotor as in claim 1 , wherein the turning moment transmitting area is formed by at least one flat defined in an outer contour of the second section.

9. The open-end spinning rotor as in claim 1 , wherein the recess is defined by a cylindrical through hole in the rotor bottom, and the socket is a section of the cylindrical through hole.

10. The open-end spinning rotor as in claim 1 , wherein the first section of the projection comprises a first cylindrical section, the recess comprising a first cylindrical section in which the first cylindrical section of the projection engages, and a second section that includes the turning moment transmitting counter-area and in which the second section of the projection engages.

11. The open-end spinning rotor as in claim 10 , wherein the rotor cup comprises a truss extending axially away from the rotor bottom, the second section of the recess defined in the truss.

12. The open-end spinning rotor as in claim 11 , wherein the second section of the recess comprises a groove that extends across the truss.

13. The open-end spinning rotor as in claim 1 , wherein the socket is defined by a through hole in the rotor bottom, the permanent magnet clipped into the through hole.

14. The open-end spinning rotor as in claim 1 , wherein the permanent magnet comprises a plastic lining cover that fixes the permanent magnet within the socket.

15. The open-end spinning rotor as in claim 1 , further comprising an axial stop surface defined between the rotor cup and the rotor shaft for axial positioning of the rotor cup on the rotor shaft.

16. The open-end spinning rotor as in claim 1 , wherein the rotor shaft comprises a ferromagnetic material at the projection.

17. A rotor cup for an open-end spinning rotor, the rotor cup configured to detachably couple with a rotor shaft, wherein the rotor shaft has a projection with a first section at an end thereof, and a second section axially aligned with the first section and having a turning moment transmitting area defined therein, the rotor cup comprising:
a permanent magnet disposed in a socket so as to define a magnetic axial coupling with the rotor shaft when the rotor cup is coupled to the rotor shaft;
a recess comprising a first section with a shape corresponding to the first section of the projection, the recess comprising a second section axially aligned with the first section of the recess and having a transmitting counter-area shape corresponding to the turning moment transmitting area of the second section of the rotor shaft projection; and
wherein upon coupling the rotor cup to the rotor shaft, the second section of the rotor shaft projection engages in the second section of the recess.

18. The rotor cup as in claim 17 , wherein the socket is defined as an axial extension of the recess.

19. The rotor cup as in claim 17 , wherein the permanent magnet is a ring magnet.

20. The rotor cup as in claim 17 , wherein the socket is defined by a through hole in the rotor cup.

21. The rotor cup as in claim 20 , wherein the permanent magnet is clipped into the through hole.

22. The rotor cup as in claim 17 , wherein the first section of the recess comprises a cylindrical shape so as to correspond to a cylindrical outer contour of the first section of the rotor shaft.

23. The rotor cup as in claim 17 , wherein the second section of the recess comprises one of an elliptical or oval shape.

24. The rotor cup as in claim 17 , wherein the recess is defined by a cylindrical through hole in a bottom of the rotor cup, and the socket is a section of the cylindrical through hole.

25. The rotor cup as in claim 10 , further comprising a truss extending axially away from a bottom of the rotor cup, the second section of the recess defined in the truss.

26. The rotor cup as in claim 25 , wherein the second section of the recess comprises a groove that extends across the truss.

27. The rotor cup as in claim 17 , wherein the permanent magnet comprises a plastic lining cover that fixes the permanent magnet within the socket.

Assignees

• Rieter Ag Maschf

Inventors

• Loos Bernd
• Kustermann Hans

Classifications

• D01H4/10 Primary

  Rotors · CPC title

• D01H4/12

  Rotor bearings; Arrangements for driving or stopping (control therefor D01H4/42) · CPC title