| 摘要 |
PROBLEM TO BE SOLVED: To make wheels automatically and reliably follow an uneven surface and uniformly distribute the load on a load-carrying platform during running on an off-road, and secure wheels necessary to stably support to cause other wheels to function as floating legs for running over which are not related to support the load-carrying platform in the case of a large step. SOLUTION: The upper and lower parts of the chambers of cylinder 24-27 and 24'-27' to hold minimum eight wheels by an oil pressure are intercommunicated by a two-system coexistence circuit wherein paralleled pipings P, P... are arranged in a spanning state so that inner wheels and outer wheels on one side are integrally formed as a pair and the inner and outer wheels on the other side are positioned facing each other to uniformly distribute the loads of the inner and other wheels. Further, four parallel passages to converge communicating pipes J1-J8 introduced from lateral and longitudinal parallel pipings are connected to forward and reverse delivery pumps 28 and 29 for controlling lateral inclination and controlling longitudinal inclination. In this case, by interposing four three-position directional control valves 30-33 to switch between the operation of both of the paralleled pipings and that of one of thereof and a two-position directional control valve 34 to switch between the connection forward and reverse pumps, individual raising and lowering control of four wheels on the inner side and four wheels on the outer side is practicable.
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