| 摘要 |
<p>A chain drive system comprising two independent rings (6, 7) with intermediate double-pinion (2) transmission element, which makes it possible to lower the engine and therefore the centre of gravity of the vehicle, thus considerably increasing the stability of the vehicle and achieving a configuration that permits also the lowering of the saddle. The drive system is provided with two chain rings (6, 7), wherein the gearbox pinion (1) transmits motion to another double pinion (2) housed in the end of the swinging arm (5) by means of an idle roller, and wherein said double pinion in turn transmits motion to another chain (7) positioned besides the small ring chain (6) and connected to the crown (3) of the rear wheel (8) hub. The result is a direct drive with two chain rings, wherein both chains can be constantly tensioned. This new drive system can be applied either to motorcycles for circulation on roads and to racing motorcycles and partially solves the problem represented by the lack of stability of the vehicle at the end of curves and after abrupt accelerations and brakings.</p> |
