| 摘要 |
PROBLEM TO BE SOLVED: To prevent maloperation for damaging an infinite reaping variable speed mechanism and carry out an improvement, etc., in the durability of an infinite variable speed change belt. SOLUTION: This combine harvester is obtained by installing a threshing part and a reaping part for continuously performing harvesting operations, arranging a speed change motor 32 for changing over the speed change ratio of infinite variable speed pulleys and a belt for changing the driving speed of the reaping part to which a power of an engine is transmitted in a stepless manner and providing a speed controller for the combine harvester capable of automatically controlling the reaping speed change motor 32 at the time of driving the reaping part. In this case, manual operating switches 53 and 54 for acceleration and deceleration are connected to a controlling circuit 46 for connecting a select switch 55 capable of selecting the reaping speed according to crop conditions and the motor 32.
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