| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a four-wheel drive work vehicle provided with hydraulic drive type axle drive units, conventionally known to comprise a steering link mechanism with a single tie rod interlocking and connecting axle support units to roughly horizontally rotate a right and a left front wheels to each other, that structure of transmission members for transmitting hydraulic oil or power between the axle drive units is complicated for avoiding the tie rod provided along the axle drive units to increase manufacturing cost or reduce maintenance performance or the like. SOLUTION: Each wheel support unit 86 is provided with a steering case 103 that supports an axle 5a, and roughly horizontally rotates. From each steering case 103, a steering arm 157 is erected, and each steering arm 157 is interlocked and connected to a sector gear 155 of a common rotation member through a connecting rod 158. As a steering operation mechanism 150 having the sector gear 155, each front wheel 5 is steered. The sector gear 155 is disposed apart behind the front axle drive unit 10. COPYRIGHT: (C)2008,JPO&INPIT
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