| 摘要 |
An automatic non-step speed changing mechanism mainly includes a pivot shaft, a first and a second set of joint disks rotatably mounted on the pivot shaft driving elements and a transmission element wound around the driving elements. The first and second sets of joint disks are provided with guide rails and passages respectively for the driving elements to slideably and rotatably locate therein. A guiding section is provided in each of the passages on the second set of joint disks for one driving element to mesh therewith while moving in and relative to the passage. When the driving elements mesh with the guiding sections and slide in the guide rails and the passage respectively provided on the first and the second set of joint disks, a winding radius of the transmission element wound around the driving elements is automatically changed.
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