| 摘要 |
<p>A fully-hydraulic steering unit (1) is described, with a housing (2) which has an internal bore (3) in which, inter alia, a control channel (6) and a tank channel (7) are arranged, with an outer sliding member (4) rotatably mounted in the internal bore (3) and an inner sliding member (5) rotatably mounted in the axial internal bore of the outer sliding member, which inner sliding member has servo openings (8) and tank bores (9). Furthermore, a pressure slot for receiving a fluid producing a pressure between the inner sliding member and the outer sliding member is provided. With a steering arrangement of this kind, there is a risk that a pressure prevailing in the control channel (6) will act from the outside on the outer sliding member so that it jams on the inner sliding member. Furthermore there is a danger that a pressure acting in the pressure slot will act from the inside on the outer sliding member so that it jams against the housing. With the present invention, jamming of the outer sliding member is prevented in every operational position. For that purpose, the pressure slot (12) is permanently in connection with the control channel (6) by way of an open fluid path (10, 11).</p> |
