| 摘要 |
<p>PURPOSE:To carry out shifting gently by carrying out a shifting operation being interlocked with a dash pot, in the process of shifting a selector valve. CONSTITUTION:When shifting a selector valve 10, a pressure oil in a pilot pipe line 10a is pressed out into a reservoir 5d via a throttled flow passage 7b due to the travel of a spool valve, to carry out gentle shifting. In this action, the pilot valve 10a and the throttled flow passage 7a function as a dash pot with respect to the travel of the spool valve. Accordingly, when the discharge pipe line of a hydraulic pump 9 is connected to a discharge pipe line 5a via the selector valve 10 by this shifting method, the connection is carried out gently.</p> |
