| 摘要 |
<p>A device for controlling a hydraulic steering clutch and brake to be used for a caterpillar R vehicle such as a bulldozer, which is simple in structure and drivable even with a monolever. For satisfying the purpose, one steering lever (5); four sets of proportional pressure control valves (1), (2), (3), and (4) operated by said steering lever; steering clutch pistons (7), (7a) on the left and right sides, respectively, connected to the output ports of said proportional pressure control valves with piping; and brake cylinders (8), (8a) are provided. Four sets of valves include two sets of valves for steering clutch in which oil pressure starts rising earlier and the other two sets for brake in which oil pressure rises later than the former two.</p> |
