SPEED CHANGE OPERATING STRUCTURE OF AGRICULTURAL WORKING VEHICLE

摘要

PURPOSE:To provide the speed change operating structure of an agricultural working vehicle allowing sudden or normal speed decrease to be performed according to the operating quantity of a speed change operating means at the time of performing speed reducing operation and also enabling operating feelings onto the speed increase side and speed decrease side to be the same feeling. CONSTITUTION:In the speed change operating structure of an agricultural working vehicle, a speed change operating means 8 is linked with a belt type continuously variable transmission 3 through speed change operating mechanism 24 operated by a motor-driven actuator 12, and the speed change operating mechanism 24 is formed into servo mechanism for operating the motor-driven actuator 12 in such a way as to operate the belt type continuously variable transmission 3 onto the speed increasing side by operating the speed change operating means 8 onto the side of going away from the neutral position N and to operate the belt type continuously variable transmission 3 onto the speed reducing side by operating the speed change operating means 8 onto the side of approaching the neutral position N. The speed change operating mechanism 24 is provided with a speed reducing degree changing means so as to perform speed reducing control of large speed reducing grade in the case of the operating quantity of the speed change operating means 8 onto the speed reducing side being large in comparison to the case of the operating quantity being small.