| 摘要 |
PROBLEM TO BE SOLVED: To prevent spoiling of a field face by providing smooth turning in a crawler type agricultural tractor. SOLUTION: A continuously variable transmission for steering interlocked and connected with an engine is attached to a transmission casing, and power is transmitted from the continuously variable transmission for steering to a power transmission system for steering inside the transmission casing. A transmission for running interlocked and connected with the engine is attached to another transmission casing provided separately from the transmission casing, and power is transmitted from the transmission for traveling to a power transmission system for running inside the transmission casing via the other transmission casing. Power from the power transmission system for steering and the power from power transmission system for running are joined by right and left planetary gear mechanisms provided inside the transmission casing, and its resultant force is transmitted respectively to right and left driving wheels of right and left running parts.
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