Steering wheel unit for generating a feedback force on a steering wheel for an electromechanical steering system

摘要

The invention relates to a steering wheel unit (1) for an electromechanical steering system of a motor vehicle. The steering wheel unit (1) has force generating means for applying a mechanical feedback force to the driver about the current steering and / or driving condition to the steering wheel (4), as well as a steering movement sensor arranged in the area of a steering wheel shaft (3) of the steering wheel (4) for detection the steering wheel position. The force generating means comprise a straight torsion bar (11) arranged along the steering wheel shaft (3), which is connected to the steering wheel (4) at a first end end (12a) and at a second end end (12b) of a first one (13a) arranged therefor and the second (13b) brake disc can be subjected to a force such that with increasing adjustment of the steering wheel (4) which deviates from driving straight ahead, in a first stage a restoring force on the steering wheel (4) increases with an angle of rotation (φ) of the steering wheel and in one the following second stage a constant restoring force on the steering wheel (4) can be generated with increasing angle of rotation (φ) to report back to the driver of a steering angle related steering angle.