| 摘要 |
PROBLEM TO BE SOLVED: To ensure ground contact of a driving wheel and a driven wheel even on an irregular ground surface to enable stable traveling, simplify a structure, reduce required space as much as possible and a movable part, prevent stability from being lost even when using a soft spring, and provide high irregularity absorbing capability. SOLUTION: Four wheels mounted on a vehicle body 1 are arranged at positions equivalent to each square corner part. Two wheels arranged at positions equivalent to corner parts on a diagonal line on one side in the square shape among these wheels are used as the driving wheels 2, 2. Two wheels arranged at positions equivalent to corner parts on a diagonal line on the other side are used as the driven wheels 3, 3. Either of both wheels among both driving wheels and both driven wheels are mounted on the vehicle body 1 through a movable mechanism 4 common for both wheels and moving both wheels integrally and vertically so as to move vertically. An energizing means 5 for springily energizing the movable mechanism downward is provided to fix the other both wheels to the vehicle body. COPYRIGHT: (C)2004,JPO
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