| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate manual adjustment of a gear shift shock corresponding to a wrong using condition and a change with the lapse of time. <P>SOLUTION: This gear shifting structure for a working vehicle is provided with a control means 47 for controlling a current value for adjusting opening of a valve and to be supplied to a valve mechanism 38 for switching operating condition of the hydraulic clutch 13 so that the hydraulic clutch 13 connected to a gear type transmission 3 in series starts the turn-off operation by reduction of the pressure on the basis of start of operation of actuators 24, 25, 30 and 32 for operating the gear type transmission 3, and that the hydraulic clutch 13 starts the turn-on operation by a pressure rise on the basis of conclusion of the operation of the actuators 23, 25, 30 and 32, and that pressure of the hydraulic clutch 13 quickly rises during the set time t after starting the turn-on operation of the hydraulic clutch 13, and that pressure of the hydraulic clutch 13 gradually rises after the set time t passed. Setting of the current value to be supplied to the valve mechanism 38 from the control means 47 immediately after the set time t passed can be changed by manual operation. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
