| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve durability of a return spring and to facilitate adjustment of the resilient force of an adjustment spring installed in the wire coupled to a speed up change electric motor, in a working vehicle which turns the speed up change shaft that operates the front wheel speed increasing mechanism by the drive force of the speed up change electric motor that acts on the speed up change shaft and the resilient force of the return spring that acts on the speed up change shaft. <P>SOLUTION: In the working vehicle, the camshaft arm is fixed to the speed up change shaft that operates the front wheel speed increasing mechanism, and a speed up ON/OFF wire coupled with the speed up change electric motor is coupled with the pin that protrudes to this camshaft arm, and the return spring that acts resiliently on the opposite direction to the pulling direction of the speed up ON/OFF wire is coupled with the pin. In the working vehicle, the return spring is coupled with the pin through the connecting plate. In the working vehicle, confirmation of the pull force adjustment of the adjustment spring is carried out by a big or a small gage pin that inserts in the winding line gap of the adjustment spring. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
