| 摘要 |
PROBLEM TO BE SOLVED: To prevent a farm field surface from being damaged by smoothening its turning in an agricultural tractor. SOLUTION: With a travel speed change gear 21 interlockingly connected to an engine 17, and with the drive shafts 38R and 38L of right and left travel sections interlockingly connected to the travel speed change gear 21, the drive shafts 38R and 38L are driven in the same rotation direction by the travel speed change gear 21. With a steering speed change gear 20 interlockingly connected to the engine 17, and with the drive shafts 38R and 38L of the right and left travel sections interlockingly connected to the steering speed change gear, the drive shafts 38R and 38L are driven in the direction opposite to each other by the steering speed change gear, and the rotation speed of each drive shaft is increased and decreased by both speed change gears for making it possible to increase and decrease the turning speed of a tractor body. A steering wheel is interlockingly connected to the steering speed change gear, and an advancing and retracting speed change lever is interlockingly connected to the travel speed change gear. The travel speed change gear and the steering speed change gear are interlockingly connected to each other through a first interlock shaft 27 and a second interlock shaft 35. COPYRIGHT: (C)2004,JPO
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