| 摘要 |
<p>A propulsion system for a vehicle comprised of two wheels (2), both of which are in the shape of hemispheres. Each of the hemispheres is mounted through a bearing (9) on a fork (4) with two pivots (8) attached to the inner race of the bearing, allowing the wheel to rotate around two perpendicular axes. The center of each wheel is attached to a drive input shaft (1) through a double universal joint (5)or a flexible shaft. By rotating the hemisphere wheel around the fork pivots the diameter of the wheel engaged with the ground is increased or decreased allowing the vehicle speed and/or direction to vary.</p> |
