Patent ID: 7328760
Filing Date: 2008-02-12
Classification: B62D,E02F

Abstract:
1. A semicrawler-type working vehicle having a vehicle body, a front steering control wheel arranged at a front position of the vehicle body, a drive shaft and a pivot shaft arranged at rear positions of the vehicle body, and a semicrawler unit driven by the drive shaft, the semicrawler-type working vehicle comprising: a track frame supporting the semicrawler unit relative to the vehicle body by means of the pivot shaft; a drive wheel arranged on the drive shaft; a front driven wheel and a rear driven wheel which are supported by the track frame such that a horizontal distance from the drive wheel to the front driven wheel is longer than a horizontal distance from the drive wheel to the rear driven wheel and such that the drive wheel is positioned between the front driven wheel and the rear driven wheel in a fore and aft direction of the vehicle body; a crawler belt wound around the drive wheel, the front driven wheel, and the rear driven wheel; and a single axis defined by the pivot shaft, the track frame being pivotal about the single axis relative to the vehicle body; wherein the pivot shaft is displaced forward from a vertical line that runs through a center of the drive wheel.