Device for measurement of an angle of an axis of rotation
View Patent ↗The invention relates to a device ( 1 ) for measurement of an angle of an axis of rotation ( 10 ), comprising a magnet ( 12 ) with a magnet surface ( 14 ), which is pivotally assembled at the axis of rotation ( 10 ), and further comprising a sensor ( 16 ) for recognition of external magnetic flux lines of the magnet ( 12 ). According to the invention, the magnet ( 12 ) comprises at least a first magnet section ( 20 ) with a magnetic first orientation ( 22 ) and the magnet ( 12 ) further at least comprises a second magnet section ( 24 ) with a second magnetic orientation ( 26 ), wherein the first magnetic orientation ( 22 ) is displaced from the second magnetic orientation ( 26 ), whereby the magnet surface ( 14 ) comprises a different concentration of external magnetic flux lines.
1. A device ( 1 ) for measurement of an angle of an axis of rotation ( 10 ) comprising a magnet ( 12 ) with a magnet surface ( 14 ), which is pivotally mounted at the axis of rotation ( 10 ), further comprising a sensor ( 16 ) for recognition of external magnetic flux lines of the magnet ( 12 ),
characterized in that,
the magnet ( 12 ) comprises at least one first magnet section ( 20 ) with a first magnetic orientation ( 22 ) and
the magnet ( 12 ) further comprises at least one second magnet section ( 24 ) with a second magnetic orientation ( 26 ),
wherein the magnet ( 12 ) is assembled at a circular arc outside of the axis of rotation ( 10 ),
wherein within the circular arc the first magnetic orientation ( 22 ) is displaced from the second magnetic orientation ( 26 ) in an axial direction and in an azimuthal direction in an angle of 90° respectively,
whereby the magnet surface ( 14 ) comprises a diverse concentration of external magnetic flux lines;
wherein a steady body is provided, having:
a first part in a form of a semicircular ring, and
a second part in a form of a cylindrical ring, pivotally assembled at the axis of rotation;
wherein the magnet is assembled at the first part,
wherein the steady body ( 30 ) is formed in plastic.
2. The device ( 1 ) according to claim 1 ,
characterized in that
the magnet ( 12 ) is composed of one piece.
3. The device ( 1 ) according to claim 1 ,
characterized in that
the first magnet section ( 20 ) and the second magnet section ( 24 ) is a permanent magnet.
4. The device ( 1 ) according to claim 1 ,
characterized in that
the steady body ( 30 ) comprises an opening ( 36 ), wherein the axis of rotation ( 10 ) is inserted in the opening ( 36 ).
5. The device ( 1 ) according to claim 1 ,
wherein the axis of rotation ( 10 ) is force fittingly assembled at the second part ( 32 ) of the steady body ( 30 ) by a press fit.
6. The device ( 1 ) according to claim 1 ,
characterized in that
the steady body ( 30 ) comprises an acceptance ( 38 ) and the magnet ( 12 ) is at least partially assembled in the acceptance ( 38 ).
7. A device ( 1 ) for measurement of an angle of an axis of rotation ( 10 ) comprising a magnet ( 12 ) with a magnet surface ( 14 ), which is pivotally mounted at the axis of rotation ( 10 ), further comprising a sensor ( 16 ) for recognition of external magnetic flux lines of the magnet ( 12 ),
characterized in that,
the magnet ( 12 ) comprises at least one first magnet section ( 20 ) with a first magnetic orientation ( 22 ) and
the magnet ( 12 ) further comprises at least one second magnet section ( 24 ) with a second magnetic orientation ( 26 ),
wherein the magnet ( 12 ) is assembled at a circular arc outside of the axis of rotation ( 10 ),
wherein within the circular arc the first magnetic orientation ( 22 ) is displaced from the second magnetic orientation ( 26 ) in an axial direction and in an azimuthal direction in an angle of 90° respectively,
whereby the magnet surface ( 14 ) comprises a diverse concentration of external magnetic flux lines;
wherein a steady body is provided, having:
a first part in a form of a semicircular ring, and
a second part in a form of a cylindrical ring, pivotally assembled at the axis of rotation;
wherein the magnet is assembled at the first part,
wherein the steady body ( 30 ) comprises an acceptance ( 38 ) and the magnet ( 12 ) is at least partially assembled in the acceptance ( 38 ), and
wherein the acceptance is in a wedge-like form.
8. The device ( 1 ) according to claim 7 , characterized in that
the magnet ( 12 ) is composed of one piece.
9. The device ( 1 ) according to claim 7 , characterized in that
the first magnet section ( 20 ) and the second magnet section ( 24 ) is a permanent magnet.
10. The device ( 1 ) according to claim 7 , characterized in that the steady body ( 30 ) is formed in plastic.
11. The device ( 1 ) according to claim 7 , characterized in that the steady body ( 30 ) comprises an opening ( 36 ), wherein the axis of rotation ( 10 ) is inserted in the opening ( 36 ).
12. The device ( 1 ) according to claim 7 , wherein the axis of rotation ( 10 ) is force fittingly assembled at the second part ( 32 ) of the steady body ( 30 ) by a press fit.