| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein in conventional cases, a mechanism for supporting a track frame comprises two front and rear support mechanisms which are a first support frame and a second support frame, the support mechanism of a shaft serving as an oscillation fulcrum of a track roller frame has an extremely complicated configuration, and the mechanism has a problem of strength since a support shaft is cantilevered. SOLUTION: In this semi-crawler device for a tractor, a drive sprocket is detachably mounted to an axle of a tractor body, and in a lower part of an axle case supporting the axle, bearing devices for holding and supporting both right and left end parts of an oscillation support shaft installed axially in parallel with the axle are constituted. An upper part of a support frame having a lower part connected to a track roller frame arranged in the longitudinal direction in the lower side is mounted to and supported by the oscillation support shaft supported by the bearing devices. An endless belt-shaped crawler is wound around the drive sprocket and a plurality of track rollers axially installed in the track roller frame. COPYRIGHT: (C)2009,JPO&INPIT
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