| 摘要 |
The present invention relates to a variable speed traction drive employing combinations of the following shapes; cones, internally tapered sleeves, dual faced internally tapered sleeves, and a combination of a dual faced internal wheel with a dual faced external shape. The primary purpose of the shapes and the manner in which they engage in traction is to achieve a matched geometry between the contacted rolling components, to increase the contacting surface areas, to engage each other in a point to point relationship, and to maintain a narrow or small difference between the largest diameter of any of the rolling components of the drive and the smallest diameter of any of the rolling components of the drive. For example, a velocity difference occurs when a cylinder is driven by traction by a cone roller, or when two cones whose angles are not alike are driven one to the other by traction. Further, when two cones are configured with like angles and they are geometrically arranged to drive one to the other, but have extreme differences of diameters, a difference of velocity also occurs between the two cones to a much lesser degree. In some of the illustrated species cone angles vary acutely or additional cones are used to produce more desirable effects. However, all additions or cone angle variations remain true to the generic element of the invention which is the matched geometry and the maintaining of narrow differences of diameter between the rolling components. The aforementioned features of this drive and other features of this invention are all directed toward reducing the scrubbing and slippage losses that are caused by differences of velocity that are always present in an infinite variable speed drive. All of the variations illustrated in FIGS. 1,2,3,4,7,8,9,10 and 11 are basically the same and follow a generic progression of geometry that for the purpose of simplicity will herein after be referred to as cones, sleeves and matching geometry.
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