| 摘要 |
PROBLEM TO BE SOLVED: To provide a self-propelled pest control machine which includes a simple steering constitution enabling four-wheel steering and suppresses a weight of the whole vehicle and a manufacturing cost.SOLUTION: The self-propelled pest control machine comprises a right/left pair of front/rear wheels 3 and 4, a four-wheel steering constitution and a chemical tank 9. The four-wheel steering constitution includes: a steering cylinder 70 including piston rods 71 actuated right/left in front of a front wheel axle case 51; arms 64 and 65 steering the front wheels 3 in linkage with the actuation of the piston rod 71; a tie rod 82 connecting front/rear the front wheel side arms 64 and 65 and a rear wheel side arm 81 steering the rear wheel 4; and the like. A ball joint 84 connecting the tie rod 82 and the rear wheel side arm 81 is disposed between a bottom part of the tank 9 and a rear wheel axle case 88. The tie rod 82 is arranged over on a lower side of the bottom part of the tank 9. The steering cylinder 70 provided on the front wheel 3 side enables four-wheel steering and a simple steering constitution. Thereby, interference of a steering mechanism with the bottom part of the tank 9 is not caused. |
