END-FACE ROTATING JOINT FOR TRANSMITTING TORQUES

Abstract

The invention relates to a magnetic end-face rotating joint (100) for transmitting torques, containing a first joint half (102) which can be connected to a first shaft, and comprising a second joint half (104) which can be connected to a second shaft. The first joint half (102) comprises a first permanent magnet (106) which has the magnet configuration of a Halbach array.

Claims

1. A magnetic disc coupling for transmitting torque in a cardiac support system, the magnetic disc coupling comprising: a first coupling half being configured to connect to a first shaft, the first coupling half comprising a first permanent magnet having a magnet configuration of a Halbach array; and a second coupling half being configured to connect to a second shaft.

2. The magnetic disc coupling of claim 1, wherein the first permanent magnet comprises a strong side.

3. The magnetic disc coupling of claim 2, wherein the first permanent magnet comprises a weak side facing away from the strong side.

4. The magnetic disc coupling of claim 2, wherein the strong side of the first permanent magnet faces the second coupling half.

5. The magnetic disc coupling claim 1, wherein the second coupling half is axially magnetized.

6. The magnetic disc coupling claim 1, wherein the second coupling half comprises a second permanent magnet having a magnet configuration of a Halbach array.

7. The magnetic disc coupling of claim 6, wherein the second permanent magnet comprises a strong side.

8. The magnetic disc coupling of claim 7, wherein the second permanent magnet comprises a weak side facing away from the strong side.

9. The magnetic disc coupling of claim 7, wherein the strong side of the second permanent magnet faces the first coupling half (102).

10. The magnetic disc coupling of claim 6, wherein the magnet configuration of the second permanent magnet comprises 2n or 2n+1 segments, and wherein n is a whole number greater than or equal to 1.

11. The magnetic disc coupling of claim 10, wherein a number of segments of the magnet configuration of the first permanent magnet is the same as a number of segments of the magnet configuration of the second permanent magnet.

12. The magnetic disc coupling of claim 1, wherein the magnet configuration of the first permanent magnet comprises 2n or 2n+1 segments, and wherein n is a whole number greater than or equal to 1.

13. The magnetic disc coupling of claim 1, wherein an end face of the first coupling half and an end face of the second coupling half are positioned opposite one another.

14. The magnetic disc coupling of claim 1, wherein the first shaft is configured to connect to a driving shaft and the second shaft is configured to connect to an output shaft.

15. The magnetic disc coupling of claim 1, wherein the first coupling half and the second coupling half are arranged coaxially.

16. The magnetic disc coupling of claim 1, wherein at least one of a magnetic field of the first coupling half and a magnetic field of the second coupling half is single-pole or multi-pole paired.

17. The magnetic disc coupling of claim 1, wherein at least one of the first coupling half and the second coupling half has a round or annular shape.

18. The magnetic disc coupling of claim 1, wherein the first coupling half and the second coupling half each comprise a disc magnet.

19. The magnetic disc coupling of claim 1, wherein a radius of the first coupling half is equal in size to a radius of the second coupling half.

20. The magnetic disc coupling of claim 1, wherein an axial length of the first coupling half is equal in size to an axial length of the second coupling half.

21. The magnetic disc coupling of claim 1, wherein at least one of the first coupling half and the second coupling half comprise at least two coupling parts.

Description

[0035] The invention is explained in more detail in the following with reference to the design examples shown schematically in the drawing.

[0036] The figures show:

[0037] FIG. 1A a magnetic disc coupling according to a first design example of the invention in a side view;

[0038] FIG. 1B a front view of the magnetic disc coupling of FIG. 1A along a sectional plane;

[0039] FIG. 2A a magnetic disc coupling according to a further design example of the invention in a side view;

[0040] FIG. 2B a front view of the magnetic disc coupling of FIG. 2A along a sectional plane;

[0041] FIG. 3A a magnetic disc coupling according to a further design example of the invention in a side view;

[0042] FIG. 3B a front view of the magnetic disc coupling of FIG. 3A along a sectional plane;

[0043] FIG. 4A a magnetic disc coupling according to yet another design example of the invention in a side view;

[0044] FIG. 4B a front view of the magnetic disc coupling of FIG. 4A along a sectional plane;

[0045] FIG. 5A a magnetic disc coupling according to yet another design example of the invention in a side view;

[0046] FIG. 5B a front view of the magnetic disc coupling of FIG. 5A, wherein the view of FIG. 5A is a sectional view along the line aA in FIG. 5B;

[0047] FIG. 6A a magnetic disc coupling according to the design example of FIGS. 5A and 5B in a side view, wherein the view of FIG. 6A is a sectional view along the line bB of FIG. 6B;

[0048] FIG. 6B a front view of the magnetic disc coupling of FIG. 6A;

[0049] FIG. 7A, FIG. 7B and

[0050] FIG. 7C a respective coupling half of a magnetic disc coupling for transmitting torque according to a further design example of the invention in three different views.

[0051] FIG. 1A shows a magnetic disc coupling 100 for transmitting torque according to one design example of the invention in a side view.

[0052] The disc coupling 100 comprises a first coupling half 102, which can be connected to a first shaft, and a second coupling half 104, which can be connected to a second shaft.

[0053] The first coupling half 102 comprises a first permanent magnet 106 having the magnet configuration of a Halbach array. The second coupling half 104 comprises a second permanent magnet 108 having the magnet configuration of a Halbach array.

[0054] The first coupling half 102 and the second coupling half 104 are arranged symmetrically with respect to a plane of symmetry 110, which is disposed midway between the first coupling half 102 and the second coupling half 104 and extends along the y-axis.

[0055] The first coupling half 102 comprises three coupling parts 111, 112 and 113, which are magnetized and form the first permanent magnet 106. The coupling parts 111, 112 and 113 are segments of the permanent magnet having magnetizations, the direction of which is different. The second coupling half 104 likewise comprises three coupling parts 114, 115 and 116, which are likewise magnetized and form the second permanent magnet 108. The coupling parts 114, 115 and 116 are segments of the second permanent magnet 108 that have magnetizations with different directions.

[0056] The first coupling half 102 has the same dimensions as the second coupling half 104. The first coupling half 102 and the second coupling half 104 are both round and, when used as intended, rotate around the x-axis which extends through the center of the first coupling half 102 and the second coupling half 104. FIG. 1B shows a front view depicting the magnetic disc coupling 100 from the right along the sectional plane indicated by the dashed line 105. In this case, the second coupling half 104 can be seen, while the first coupling half 102 is obscured by the second coupling half 104.

[0057] The coupling parts 111 and 114 have the same magnetization, which extends in the direction of the negative x-axis. The coupling parts 113 and 116 have the same magnetization, which extends in the direction of the positive x-axis.

[0058] The coupling parts 112 and 115 have opposite magnetizations, whereby the coupling part 112 extends along the y-axis and the coupling part 115 extends along the negative y-axis.

[0059] The three coupling parts 111, 112 and 113 of the first coupling half 102 form a Halbach array. Consequently, the first permanent magnet 106 has the magnet configuration of a Halbach array. A Halbach array having only three segments is the smallest possible Halbach array. The three coupling parts 114, 115 and 116 of the second coupling half 104 likewise form a Halbach array. The second permanent magnet 108 thus also has the magnet configuration of a Halbach array. In the view of FIG. 1A, the direction of the magnetization of the coupling part 112 relative to the magnetization of the coupling part 111 is tilted 90° about an axis perpendicular to the x- and y-axis shown there. The magnetization of the coupling part 113 relative to the magnetization of the coupling part 112 is tilted 90° about an axis perpendicular to the x- and y-axis; relative to the magnetization of the coupling part 111 it is tilted 180° about this same axis. Correspondingly, in the view of FIG. 1A, the direction of the magnetization of the coupling part 115 relative to the magnetization of the coupling part 114 is tilted 90° about an axis perpendicular to the x- and y-axis shown there. The magnetization of the coupling part 116 relative to the magnetization of the coupling part 115 is tilted 90° about an axis perpendicular to the x- and y-axis; relative to the magnetization of the coupling part 111 it is tilted 180° about this same axis.

[0060] The magnetized coupling parts 111 and 113 of the first coupling half 102, which is shown on the left side in FIG. 1A, together induce a magnetic field, which points downward on the right side of the first coupling half 102 and points upward on the left side of the first coupling half 102. The coupling part 112 of the first coupling half 102 induces a magnetic field which, in the view of FIG. 1A, points downward on the right side of the first coupling half 102 and also points downward on the left side of the first coupling half 102. If the total magnetic field of the coupling parts 111, 112 and 113 is calculated, the result for the right side of the first coupling half 102 is an amplification of the magnetic field components that originate on the one hand from the coupling part 112 and on the other hand from the coupling parts 111 and 113 and, for the left side of the first coupling half 102, the result is a mutual attenuation of the magnetic field components that originate on the one hand from the coupling part 112 and on the other hand from the coupling parts 111 and 113. Consequently, the magnetic field on the right side of the first coupling half 102 is greater than on its left side. Therefore, in the view of FIG. 1A, the strong side of the Halbach array of the first permanent magnet 106, i.e. the side of the Halbach array on which the magnetic field is strong, is to the right of the first coupling half 102 and the weak side of the Halbach array of the first permanent magnet 106, i.e. the side of the Halbach array on which the magnetic field is weak, is to the left of the first coupling half.

[0061] Correspondingly, the result for the second coupling half 104 on the left side is an amplification of the magnetic field components that originate on the one hand from the coupling part 115 and on the other hand from the coupling parts 114 and 116 and, for the right side of the first coupling half 104, the result is a mutual attenuation of the magnetic field components that originate on the one hand from the coupling part 115 and on the other hand from the coupling parts 114 and 116. The magnetic field is thus weak on the right side of the second coupling half 104 and strong on the left side of the second coupling half 104. Therefore, in the view of FIG. 1A, the strong side of the Halbach array of the second permanent magnet 108, i.e. the side of the Halbach array on which the magnetic field is strong, is to the left of the first coupling half 104 and the weak side of the Halbach array of the second permanent magnet 108, i.e. the side of the Halbach array on which the magnetic field is weak, is to the right of the second coupling half 104.

[0062] Thus, the total magnetic field between the first coupling half 102 and the second coupling half 104 is strong and the total magnetic field outside the first coupling half 102 and the second coupling half 104 is weak. This results in a strong coupling between the first coupling half 102 and the second coupling half 104.

[0063] The coupling parts 111, 112 and 113 in the form of segments of the first permanent magnet 106 in the first coupling half 102 form a single-pole paired arrangement with the coupling parts 114, 115 and 116 in the form of segments of the second permanent magnet 108 of the second coupling half 104.

[0064] FIG. 2A shows a magnetic disc coupling 100 for transmitting torque according to a further design example of the invention in a side view. FIG. 2B shows a front view of the magnetic disc coupling according to FIG. 2A along a sectional plane. In contrast to the embodiment of FIGS. 1A and 1B, both the first coupling half 102 and the second coupling half 104 respectively comprise a non-magnetic mounting plate 130.

[0065] FIG. 3A shows a magnetic disc coupling 100 for transmitting torque according to yet another design example of the invention in a side view. FIG. 3B shows a front view of the magnetic disc coupling according to FIG. 3A along a sectional plane. The embodiment of FIGS. 3A and 3B differs from the embodiment of FIGS. 2A and 2B in that both the mounting plate 130 of the first coupling half 102 and the mounting plate 130 of the second half 104 are respectively connected to a shaft. The mounting plate 130 of the first coupling half 102 is connected to a driving shaft 132 and the mounting plate 130 of the second coupling half 104 is connected to an output shaft 134.

[0066] FIG. 4A shows a magnetic disc coupling 100 for transmitting torque according to yet another design example of the invention in a side view. FIG. 4B shows a front view of the magnetic disc coupling according to FIG. 4A along a sectional plane. The embodiment of FIGS. 3A and 3B differs from the embodiment of FIGS. 3A and 3B in that both the driving shaft 132 and the output shaft 134 are directly connected to the respective magnets of the first coupling half 102 and the second coupling half 104.

[0067] FIG. 5A shows a magnetic disc coupling 100 for transmitting torque according to yet another design example of the invention in a side view. FIG. 5B shows a front view of the magnetic disc coupling according to FIG. 5A. The view of FIG. 5A is a sectional view along the line aA. The embodiment of FIGS. 5A and 5B differs from the embodiment of FIGS. 1A and 1B in that the disc coupling 100 is double-pole paired. The first coupling half 102 and the second coupling half 104 each comprise four segments. FIGS. 6A and 6B show the same embodiment as FIGS. 5A and 5B, but FIG. 6A shows a section along the line bB.

[0068] FIG. 7B shows a first coupling half 102 of a magnetic disc coupling 100 for transmitting torque according to yet another design example of the invention in a side view. FIG. 7A and FIG. 7C each show a front view of the second coupling half 102 of the magnetic disc coupling according to FIG. 7B; FIG. 7A shows a view from the left, FIG. 7C shows a view from the right.

[0069] In this case, the first coupling half 102 is a four-poled variant comprising a total of five segments, whereby an annular magnet is attached as one segment to an inner side, i.e. the side facing away from the end face, of the first coupling half 102, and the half of the first coupling half 102 on the end face comprises four segments. The magnetic disc coupling 100 for transmitting torque comprises two such coupling halves opposite to one another.

[0070] In summary, the following preferred features of the invention should in particular be noted:

[0071] A magnetic disc coupling 100 for transmitting torque comprises a first coupling half 102, which can be connected to a first shaft; and comprises a second coupling half 104, which can be connected to a second shaft. The first coupling half 102 comprises a first permanent magnet 106 having the magnet configuration of a Halbach array.

[0072] The invention relates in particular to the aspects specified in the following clauses: [0073] 1. Magnetic disc coupling (100) for transmitting torque, comprising: [0074] a first coupling half (102), which can be connected to a first shaft; and a second coupling half (104), which can be connected to a second shaft; [0075] wherein the first coupling half (102) comprises a first permanent magnet (106) comprising a Halbach array. [0076] 2. Magnetic disc coupling (100) according to Clause 1, characterized in that the second coupling half (104) is axially magnetized. [0077] 3. Magnetic disc coupling (100) according to Clause 1, characterized in that the second coupling half (104) comprises a second permanent magnet (108) comprising a Halbach array. [0078] 4. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the end faces of the first coupling half (102) and the second coupling half (104) are opposite one another. [0079] 5. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the first shaft can be connected to a driving shaft (132) and the second shaft can be connected to an output shaft (134). [0080] 6. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the first coupling half (102) and the second coupling half (104) are arranged coaxially. [0081] 7. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that a strong side of the Halbach array of the first coupling half (102) and/or the second coupling half (104) faces the respective other coupling half (102, 104). [0082] 8. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the magnetic field of the first and/or second coupling half is single-pole or multi-pole paired. [0083] 9. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the first coupling half (102) and the second coupling half (104) each have 2n segments, wherein n is a whole number greater than or equal to 1. [0084] 10. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that at least one of the first coupling half (120) and/or the second coupling half (104) has a round or annular shape. [0085] 11. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the first coupling half (102) and the second coupling half (104) each comprise a disc magnet. [0086] 12. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that a radius of the first coupling half (102) is the same size as a radius of the second coupling half (104). [0087] 13. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that an axial length of the first coupling half (102) is the same as an axial length of the second coupling half (104). [0088] 14. Magnetic disc coupling (100) according to any one of the preceding clauses, characterized in that the first coupling half (102) and/or the second coupling half (104) each comprise at least two coupling parts (111, 112, 113, 114, 115, 116).