| 摘要 |
Two parts (1, 2) of the steering column of the servo-steering may rotate one with respect to the other and to a limited extent by means of a torsion bar (8). A rotary slide bar comprised of a rotary slide (3) and of a sleeve (4) may be actuated in the limit of said rotary travel. The body (9) of the valve encloses a piston (18) to obtain a reactive force, which piston is connected with the rotary slide (3) of the first part (1) of the steering column through a helical toothing (22) and with the sleeve (4) of the second part (2) of the steering column through an axial guide (25). Each compression space of the working cylinder (7) is connected to a chamber (20 or 21) of the reaction piston (18). When the steering is operated, the working pressure is always present in one of the two chambers (20, 21) so that an axial actuation force acts on the reactive piston (18). By means of the helical toothing (22), the axial actuation force is transformed into a rotary force which is exerted opposite to a rotation imparted by the steering wheel to the part (1) of the steering column. |
