| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent falling down of a vehicle body caused by sudden handle turn in high speed traveling. <P>SOLUTION: An emergency steering device 28 for feeding an operation oil delivered from an emergency pump 31 rotated/driven responding to a travel speed in stopping of an engine is provided. The steering device for the working vehicle is constituted such that a part of the operation oil fed from a steering pump 23 driven by the engine to a steering cylinder 15 in traveling during operation of the engine is taken out from an operation oil taking out pipe 52 by utilizing a suction action of the emergency pump 31 and is fed to a suction port 32c of a flow dividing valve 32. A larger amount of operation oil delivered from the steering pump 23 is taken out through the emergency pump 31 as getting higher in traveling speed, and a steering speed by the steering cylinder in high speed traveling is reduced thereby. <P>COPYRIGHT: (C)2009,JPO&INPIT |
