| 摘要 |
PROBLEM TO BE SOLVED: To share/support load by two free turning wheels pivotally supported by an equalizer link on a rear side of a truck frame when the front free turning wheel rides on an obstacle such as a stone, to reduce vertical vibration, and to also make power transmission from a drive wheel to a crawler sufficient. SOLUTION: A horizontal distance L1 from a rocking shaft 8 to a front driven wheel 3 is set longer than a distance from the rocking shaft to a rear driven wheel 4, and the rocking shaft is arranged below a center of the drive wheel 6. The two free turning wheels 5 at a rear side out of the free turning wheels 5 are pivotally supported on the equalizer link 20, and a longitudinal midway part of the equalizer link is pivotally supported on the truck frame 2 through a pivot shaft 22. A horizontal distance S1 from the rocking shaft to the pivot shaft is set shorter than a distance from the rocking shaft to a wheel shaft 5A of the front side free turning wheel out of the free turning wheels. A center of the drive wheel and the rocking shaft are arranged between the wheel shaft 5A of the front side free turning wheel out of the two free turning wheels at a rear side pivotally supported on the equalizer link in a longitudinal direction and the pivot shaft. COPYRIGHT: (C)2011,JPO&INPIT
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