| 摘要 |
The invention relates to a superimposed steering system (1) for a vehicle, in particular a servo-assisted or power steering system for a motor vehicle. Said system comprises a differential drive (4), which is configured as a shaft drive (11) and has a first input shaft (2) and a second input shaft (3), for superimposing the rotational angles that occur in the first and second input shafts (2, 3) on an output shaft (5) of the differential drive (4). The output shaft (5) acts on an input shaft (6) of a steering gear (7). The first input shaft (2) interacts with a steering handle (9) by means of a steering shaft (8) and the second input shaft (3) interacts with a servo motor (10). The aim of the invention is to provide a superimposed steering system that can apply an additional steering angle, without play, to the output shaft (5) and that has a simple, cost-effective, space-saving construction, whilst being easy to install. To achieve this, the first input shaft (2) is directly connected in a detachable manner to a radially flexible flex-spline (13) of the shaft drive (11), said first input shaft (2) passing through an eccentric drive core (12) of the shaft drive (11), which extends into the radially flexible flex spline (13). |
