| 摘要 |
A steering valve (1) for power-steering gears contains two valve elements (4, 8), which are rotatable relative to each other. A corresponding centering unit (16) contains two centering elements (17, 18), which are rotation-fixed relative to the valve elements (4, 8) and which-together with the valve elements (4, 8)-are rotatable and axially displaceable relative to each other. Both centering elements (17, 18) feature radially aligned grooves, between which anti-friction elements (26) are inserted.Assembly is broken down into the following stages:The two valve elements (4, 8)-without centering unit (16)-are centrally aligned and linked via torsion bar spring (12).Separate from the steering valve (1), the two centering elements (17, 18) are pre-assembled in an assembly fixture and aligned in their mechanical center together with the anti-friction elements (26).The two aligned valve elements (4, 8) are linked to the two aligned centering elements (17, 18) by firstlinking the first centering element (17) to the first valve element (4), whereby the first centering element is aligned relative to the first valve element by means of a rotation-fixed axial guide element (20) and the link is non-rotatable but axially displaceable,and then linking the second centering element (18) to the second valve element (8) via longitudinal press fit, whereby the link is established by means of axial displacement of the entire centering unit (16) along the non-rotatable axial guide element (20).
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