| 摘要 |
<p>A power steering gear intended in particular for motor vehicles comprises a steering valve (15) which has two intake seat valves (23, 24) and two outlet seat valves (25, 26), each with their respective closure elements (31; 36), for controlling a pressurised medium for a servo motor. The closure elements (36) of the outlet seat valves (25, 26) can be actuated via an actuating device in accordance with a rotary movement of a steering shaft connected to a steering input member (10). The closure elements (31) of the intake seat valves (23, 24) are hydraulically balanced in relation to pressure from a pressure source and with the force of closure springs (32) keep the intake seat valves (23, 24) closed when steering valve (15) is in the neutral position. The outlet seat valves (25, 26) are opened when the steering valve (15) is in the neutral position. The effective cross-section of the closure elements (36) of the outlet seat valves (25, 26) is smaller than that of the closure elements (31) of the intake seat valves (23, 24). The steering valve (15) is situated between the steering input member (10) and a steering output member (8). The actuating device has at least one actuating lever (27) to actuate the outlet seat valves (25, 26).</p> |
