| 摘要 |
<p>Hydraulic steering unit (1) comprising a supply port arrangement having a high pressure port (2) and a low pressure port (5), a working port arrangement having two working ports (7, 8), and control means arranged between the supply port arrangement and the working port arrangement and having a flow meter (11) and valving means, the valving means being connectable to a steering element (10) and defining orifices (Ad, A2-A5, AN), the orifices changing their area between a neutral position, a normal operating position and a maximum displacement position for each working port (7, 8). A hydraulic steering unit is provided giving the user the feeling of a hard end stop at maximum displacement. This object is solved in that in the maximum displacement position an end stop orifice (AN) connects the high pressure port (2) upstream the flow meter (11) with the low pressure port (5).</p> |
