| 摘要 |
PROBLEM TO BE SOLVED: To provide a traveling apparatus of a working car adopting a lifting and lowering structure suitable even for a small-sized car or an inexpensive model while improving the operating efficiency and traveling straight advance properties. SOLUTION: A machine body 2 is provided with a pair of left and right crawler traveling apparatuses 1 and 1 and a grain tank loaded on the right side. The crawler traveling apparatus 1 on the right side is composed of a lifting and lowering crawler traveling apparatus 1S freely drivable, liftable and lowerable within a prescribed vertical range for the machine body 2. The crawler traveling apparatus 1 on the left side is composed of a changeover crawler traveling apparatus 1K changing over the height to two positions of a lifted position to be at the same height level as that of the most lifted crawler traveling apparatus 1 on the right side and a lowered position to be at the same height level as that of the lifting and lowering crawler traveling apparatus 1S located at the central height within the prescribed vertical range L. COPYRIGHT: (C)2004,JPO
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