| 摘要 |
PCT No. PCT/JP94/00984 Sec. 371 Date Feb. 21, 1995 Sec. 102(e) Date Feb. 21, 1995 PCT Filed Jun. 20, 1994 PCT Pub. No. WO95/00372 PCT Pub. Date Jan. 5, 1995A vehicle body levelling device for a working vehicle having outriggers 5 provided at the front and rear of a self-propelled lower running body 1 for stabilizing the vehicle body while in service wherein the inclinations of the vehicle body in the front to rear and left to right directions thereof are detected by means of a front to rear inclination detector 13 and a left to right inclination detector 14, respectively, and the lengths of the front, rear, left and right outrigger arms 6 are detected by outrigger length detectors 18 so as to calculate by a controller 10 required amount of extension of piston rods of the left and right jack cylinders 7 provided on the front and rear outriggers 5, and wherein a control valve 15 provided on each of the jack cylinders is controlled in accordance with results of the calculation, whereby the vehicle body can be levelled in a short period of time even on an inclined place. The vehicle body levelling device further comprises a two-axis inclination detector 115 for detecting the inclinations in the front to rear and left to right directions of the vehicle body and hydraulic pressure detectors 117 provided on the respective jack cylinders 7, whereby extension/contraction amounts of the piston rods of the respective jack cylinders 7 are calculated by a controller 120 in accordance with the inclinations of the vehicle body detected by the two axis inclination detector 115 and an individual outrigger valve 111 provided on each of the jack cylinders 7 is controlled such that the hydraulic pressure of each of the jack cylinders 7 becomes a predetermined value, thereby making it possible to level the vehicle body in a short period of time only by operating an automatic levelling switch 121.
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