| 摘要 |
<p>PURPOSE:To improve efficiency and reduce size and weight by connecting a large area side of a pressure intensifying cylinder to a pump through a pressure intensifying switching valve capable of being switched according to the magnitude of a load and providing a check valve between the pump and the cylinder. CONSTITUTION:The small area side of a pressure intensifying cylinder 5 is connected to a hydraulic actuating cylinder 4 while the large area side of the pressure intensifying cylinder 5 is connected to a pump 1 through a pressure intensifying switching valve 6 capable of being switched according to the magnitude of a load, and a check valve 7 is provided between the pump 1 and the hydraulic actuating cylinder 4. Accordingly, the components of a hydraulic system such as a pump, a directional switching valve and their arrangement can be reduced in their sized and weights. And the efficiency can be improved, because a large output can be obtained from hydraulic power source pressure lower than that of a conventional hydraulic system.</p> |
