Centering device, in particular, a centering device for steering valves

摘要

PCT No. PCT/EP93/02521 Sec. 371 Date Mar. 29, 1995 Sec. 102(e) Date Mar. 29, 1995 PCT Filed Sep. 17, 1993 PCT Pub. No. WO94/07732 PCT Pub. Date Apr. 14, 1994A centering device for steering valves contains a torsion bar (1) that is clamped between a drive part (2) and a power take-off part (3). Because torsion bar (1) does not permit any exact central positioning, a radial borehole (6) of a valve bushing (3A) connected with the power take-off part (3) is provided. A pin (7) which includes a ball-shaped end engages an oblique surface groove (8) and the pin (7) is loaded by a ring-shaped spring (11). Spring (11) sits in a ring groove (10) and includes a flattened section (12). In the area of the flattened section (12), pin (7) engages a recess (13) of spring (11). The mutually rotatable structural parts can be set exactly in the neutral position by this centering device.