| 摘要 |
PROBLEM TO BE SOLVED: To update and change the number of rotation of an engine and the speed ratio of a non-stage speech changing mechanism by a single operating member, and to prevent the decrease of the number of revolution of the engine at the time of an overload work. SOLUTION: The rotation of an engine is transmitted through a non-stage speed changing mechanism 64 to a mission case for traveling so that this machine body can travel at a freely changeable speed in this mobile agricultural machine. In this case, the speed ratio of the non-stage speed changing mechanism can be changed while being linked with an operating member 87 for changing the number of rotation of the engine. Also, an overload operating areaβin which the operating member 87 is operated beyond a normal operating areaαis provided so that the speed ratio of the speed changing mechanism can be reduced to a prescribed value when the operating member 87 is operated in the overload operating areaβ.
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