| 摘要 |
PURPOSE: To make it possible to use effectively to produce a force which articulates every articulation jack and check down the number of valve disks to a minimum. CONSTITUTION: Where there are provided a front hull 4 and a rear hull 5, which are relatively bendable to each other and articulation jacks NJ1 to NJ8 which connect these front and rear hulls 4 and 5 and a hydraulic circuit which expand these articulation jacks NJ1 to NJ8, there are installed a group of jacks J1 and J3, and a group of jacks J2 and J4, which are opposed to each other. Two articulation jacks, which are stated above, are laid out respectively these groups of jacks. Flow dividing valves F1 to F4, which divide the flow of pressure oil and can feed the pressure oil, are installed to the bottom chamber of the specified articulation jacks, for example, NJ1 and 2 and a rod chamber of the other articulation jacks, for example, NJ5 and 6. The flow rate ratio thus flow-divided, is set so that it may be identical to the ratio between a pressure receiving area of the bottom chambers of the specified articulation jacks NJ1 and 2 and the pressure receiving area of the rod chambers of the other articulation jacks NJ5 and NJ6. |
