Sensor device for detecting the rotational position of a rotating shaft

1. A sensor device for detecting the rotational position of a rotating shaft which is rotatably mounted in a housing, comprising:

an injection-molded transducer magnet which is fastened to a carrier part connected to the shaft;

wherein the carrier part is a carrier pin, a portion of which is accommodated in an axial central recess in an end face of the shaft;

wherein the transducer magnet has an annular design comprising an axial central recess which accommodates a portion of the carrier pin with a positive fit; and

wherein the positive fit comprises radial depressions and radial elevations projecting into the depressions between the transducer magnet and an outside jacket of the carrier pin.

2. The sensor device according to claim 1 , wherein the transducer magnet surrounds the carrier pin.

3. The sensor device according to claim 1 , wherein the transducer magnet is designed as an injection-molded component and is molded onto the carrier pin.

4. A sensor device according to claim 1 , wherein the transducer magnet is disposed at an axial distance from the end face of the shaft.

5. A sensor device according to claim 1 , wherein the transducer magnet is positively seated on the carrier pin.

6. A sensor device for detecting the rotational position of a rotating shaft which is rotatably mounted in a housing, comprising:

an injection-molded transducer magnet which is fastened to a carrier part connected to the shaft;

wherein the carrier part is a carrier pin, a portion of which is accommodated in an axial central recess in an end face of the shaft;

wherein the transducer magnet has an annular design comprising an axial central recess which accommodates a portion of the carrier pin;

wherein the transducer magnet is positively seated on the carrier pin; and

wherein the positive fit comprises radial depressions and radial elevations projecting into the depressions between the transducer magnet and an outside jacket of the carrier pin.

7. A sensor device according to claim 1 , wherein the transducer magnet is connected to the carrier pin by a friction fit.

8. The sensor device according to claim 7 , wherein the friction fit is formed by roughening the directly adjoining contact surfaces between the carrier pin and transducer magnet.

9. A sensor device according to claim 1 , wherein the carrier pin extends into the recess in the end face of the shaft.

10. A sensor device according to claim 1 , wherein at least one contact surface between the recess and the carrier pin is provided with a notch.

11. A steering system comprising a sensor device according to claim 1 , wherein the shaft comprising the transducer magnet is a steering shaft of the steering system.

12. An electric motor comprising a sensor device according to claim 1 , wherein the shaft comprising the transducer magnet is the rotor shaft of the electric motor.

13. The sensor device according to claim 2 , wherein the transducer magnet is designed as an injection-molded component and is molded onto the carrier pin.

14. A sensor device according to claim 2 , wherein the transducer magnet is disposed at an axial distance from the end face of the shaft.

15. A sensor device according to claim 3 , wherein the transducer magnet is disposed at an axial distance from the end face of the shaft.

16. A sensor device according to claim 2 , wherein the transducer magnet is positively seated on the carrier pin.

17. A sensor device according to claim 3 , wherein the transducer magnet is positively seated on the carrier pin.

18. A sensor device according to claim 4 , wherein the transducer magnet is positively seated on the carrier pin.

19. A sensor device according to claim 2 , wherein the transducer magnet is connected to the carrier pin by a friction fit.

20. A sensor device according to claim 1 , wherein the carrier pin extends into the recess in the end face of the shaft.