| 摘要 |
PROBLEM TO BE SOLVED: To improve a trouble caused by speed control impossibility on the auger elevation, vehicle body horizontal control, and the like of a working system circuit, in an oil pressure-controlling circuit comprising a traveling system circuit and the working system circuit. SOLUTION: This oil pressure controller in the combine harvester, having an oil pressure-controlling circuit H for feeding a hydraulic oil from a single hydraulic pump 1 to the traveling system circuit T for the traveling of a vehicle body 2 and the working system circuit W for various works in independent set pressures, respectively, is characterized by connecting switching electromagnetic values 4 for switching working portions for reaping and lifting, the elevation of an auger, the horizontal control of the vehicle body, and the like in parallel on the side of a control flow (a) for feeding the hydraulic oil through proportional flow control valves 3, in the working system circuit W, thereby making it possible to control the working speeds of the hydraulic cylinders 5, respectively, using sheet type valves (s) as the reaping and lifting electromagnetic valves 4a for the reaping and lifting and the auger elevation electromagnetic valve 4b for elevating the auger, and disposing the reaping and lifting electromagnetic valves 4a on the lower side of the step 7 of a cabin 6 together with the oil pressure control valves of the traveling system circuit T and the like. COPYRIGHT: (C)2005,JPO&NCIPI
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