MOBILE AGRICULTURAL MACHINE

摘要

PROBLEM TO BE SOLVED: To perform turning on a road and dry rice field quickly and to improve turning performance on a muddy field or muddy ground. SOLUTION: In a mobile agricultural machinery, a drive force is transmitted to a right and left traveling crawler by the operation of a travelling gear lever 73 through a gear member 25 to change travelling speed continuously. And also the difference of driving velocity of the right and left travelling crawler is changed continuously through the operation of a steering member 28 by a steering wheel 19. The controls of travelling speed change and steering are related and carried out being divided into two modes: A dry rice field mode to be suitable for travelling on the dry rice field where surface mud soil layer in the farm is dry and a muddy field mode to be suitable for travelling on the muddy field where surface mud soil layer in the farm is soft.