| 摘要 |
<p>A hub is rigidly torsionwise attached to a leading shaft but free to move axially and radially. A rotary plate is arranged on said hub through a ball bearing and carries a ring provided with four conical transmission surfaces . The transmission surfaces of the ring run on surfaces of two rims of a wheel integral with the casing, and the transmission surfaces run on surfaces of two rims of a second wheel attached to the driven shaft. and coaxial with the wheel . The distance between the rims is adjustable. When the driving shaft rotates, the ring effects a slow oscillation motion about the leading shaft and transmits such motion to the wheel . The two transmission ranges are offset by 180.degree. . The excentricity is adjustable between a maximum and zero, which allows the obtention of a reduction up to the infinite. A toothing may be provided in the transmission areas. As toothing elements, the ring my be provided with sets of axially free disks and arranged on two rims, which mesh with grooves provided in the surfaces . Adjustement devices, preferably in the form of a unit assembly, are used for adjusting the rims and the hub</p> |
