| 摘要 |
PURPOSE:To get a stable and certain motion, by performing both of dissolving the difference in rotation speed between front/rear wheels and strongly driving one of the wheels while the other wheel slips, through adding up two-stage functions of positive clutch cams. CONSTITUTION:While making a turn, the front wheel comes to slip because torque of the front wheel driving shaft 9 is diminished as the front wheel tends to rotate faster than the rear wheel, and the compressive force of a friction clutch is diminished, consequently, the faster rotation of the front wheel is dissolved without influencing the rear wheel driving shaft. Moreover, in case of bounding the rear wheel while travelling on the rough road, as the thrust force of a positive clutch cam 19 is diminished, and the thrust force of the other positive clutch cam 5 is not changed, the fastening force to the friction clutch 7 is increased and the front wheel driving shaft 9 is driven by all input torque. In this way, stable motion can be kept by adding up the functions of these cams.
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