| 摘要 |
PURPOSE:To facilitate a height adjusting operation in a structure for carrying out height adjustment by rotating each wheel side case by a travel driving force, by giving a travel driving force to one driving system in a condition of disengaging a clutch while applying a brake and carrying out the height adjustment. CONSTITUTION:At the time of increasing a height, after removing the fixing bolts 25 of the rotating cases of a front wheel 1 and a rear wheel 2, a front wheel driving lever 37 is set to a 'break position' and the breaking piece of a front-wheel driving clutch gear is engaged with a braking body to engage a front-wheel power take out shaft in an unrotative condition. As the rear wheel is driven in this condition, since the front wheel 1 is prevented from advancing, a rear wheel side case 4 is rotated around the rear body side case 5 and raised. As the rotation of the rear wheel side case 4 is stopped, the whole machine body is pushed forward due to the rotation of the rear wheel, and the portion of the front wheel side case 3 of the front wheel 1 is pushed up by the rear wheel 2 to start rotating around the front axle case 8, increasing the height of the front wheel 1. |
