| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a travelling transmission operation accompanied with a steering lever operation, and carry out a straight forward travelling and a course correction operation during farm working, and a spin turn operation for directionally changing toward position of a next operation step in a field headland, by only a serial successive right and a left tilting operation of a steering lever. SOLUTION: This combine comprises a continuously variable transmission mechanism for variably transmitting driving force of an engine to a right and a left travelling crawlers by a travelling shift operation of a gear shift lever 68, and a steering hydraulic motor generating a difference in a driving speed of the right and left travelling crawlers by an operation of a steering lever. In this combine, a travelling speed is reduced in accordance with a manipulated variable of the steering lever 141 which carries out a tilting operation to a right and left, a turning travelling in a left direction is performed by tilting the steering lever 141 in the left direction, and the turning travelling in a right direction is performed by tilting the steering lever 141 in the right direction. |
