Working machine lifting control system for agricultural work vehicle

摘要

PROBLEM TO BE SOLVED: To provide a working implement control system for working vehicle, enabling lift position change to either ascending side or descending side in compliance with situation using a motor operative tool despite using conventional position lever and control link.;SOLUTION: The working implement control system has the following mechanism: A lever side control link 103 is coordinated in between a position lever 20 and a position control valve 90 via a feedback link 101 in between a lift arm 7 and the position control valve 90, and the position control valve 90 is switched according to the operative position of the position lever to make a lift control of a working implement. In this system, apart from the link 103, a switching member 90a for the position control valve 90 and a motor 95 are coordinated with each other via a motor control link 102, wherein the switching member 90a is arranged with a first spring member 90c impelling the member 90a toward descending side. The link 103 is equipped with a unit to allow the link 103 to turn toward descending side and provided with a second spring member 24 impelling the link 103 toward ascending side, and the switching member 90a is made switchable to ascending/descending mode by the motor 95 without being restricted by the operative position of the position lever 20.;COPYRIGHT: (C)2008,JPO&INPIT