| 摘要 |
This mechanical speed variator has the characteristic of consisting of an idle barrel-shaped rolling body (6) interposed between two flat surfaces (1, 4), specifically a driving and a driven surface, rotating with their axes slightly inclined (a) and lying in two parallel geometrical planes, the idle barrel-shaped rolling body resting on these surfaces and able to slide on command along two of their parallel directrices in order to connect together, by self-wedging friction created by said inclination, those peripheries of said rotating flat surfaces which correspond to transmission ratios determined by the ratio of the peripheral speeds of those points of the two surfaces brought into contact with the idle barrel-shaped rolling body.
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