MOVING AGRICULTURAL MACHINE
Document Type and Number:
Japanese Patent JP3730378
PROBLEM TO BE SOLVED: To perform steering operation by one hand by providing a row alignment position, a brake turn position, and a spin turn position within a straight advancing traveling range to a maximum steering range of a steering operating member in a moving agricultural machine in which the steering operating member is provided to produce a difference in a driving speed of right and left traveling parts by a steering operation.
SOLUTION: A strap alignment position, a brake turn position, and a spin turn position are provided with in a straight advancing traveling range to a maximum steering range of a steering wheel 19. When the steering wheel 19 is turned from the straight advancing traveling position by 15° or more, a first decelerating rod 131 is towed to decelerate the traveling shift output from a hydraulic continuously variable shift mechanism 25. In this case, the brake turn operation of traveling crawlers is made to swing a vehicle in right and left directions by a difference in traveling speed between them in the same direction. When the steering wheel 19 is rotated by approx. 135°, a machine body center speed is reduced to approx. one-fourth of the speed is straight advancing traveling and the traveling crawlers inside the swing is drivingly rotated reversely for spin turn operation in which a machine body is turned about the traveling crawlers inside the swing.
October 14, 2005
September 16, 1997
YANMAR AGRICULT EQUIP CO LTD
A01B69/00; B62D11/18; A01D69/00; B62D11/08; A01B69/00; B62D11/06; A01D69/00; (IPC1-7): B62D11/08; A01B69/00; A01D69/00