Rotational angle sensor assembly and steering system for a vehicle

A steering system for a vehicle, the steering system comprising:

• a rigid steering column;
• a control system;
• a steering wheel rotatable on the steering column via a steering wheel actuator;
• a shaft, the steering wheel actuator being connected to the control system in a signal-transmitting manner and has an external rotor electric motor that is rigidly attached to the steering column and connected to the steering wheel via the shaft in a torque-transmitting manner;
• and
• an angular position sensor assembly connected to the control system in a signal-transmitting manner for determining an angular position of the shaft rotatably fixed to the steering wheel and connected in a torque-transmitting manner to the steering wheel actuator when the shaft rotates about an axis of rotation of the shaft,
• wherein the angular position sensor assembly comprises a rotational encoder connected to the shaft in a force transmission manner;
• a rotational sensor to detect movement of the rotational encoder;
• a non-rotatable first gear part of a gearbox of the angular position sensor assembly that is arranged on the shaft;
• and an angular position encoder which is non-rotatably fixed to the shaft and an angular position sensor corresponding to the angular position encoder for detecting rotations of the shaft about the axis of rotation in an angular position range of less than −/+360°,
• wherein the rotational encoder is designed as a second gear part of the gearbox that is engaged with the first gear part,
• wherein the gearbox simultaneously forms a fixed mechanical stop of the shaft on a first end of an angular position range of the shaft when the shaft rotates counterclockwise and on a second end of the angular position range of the shaft when the shaft rotates clockwise, and
• wherein the angular position encoder and the angular position sensor additionally sense the rotary position of the external rotor of the electric motor relative to the rigid steering column.