| 摘要 |
Planetary gearing includes a toothed gear, a pair of toothed central gear meshing with the toothed planet gear and having a respectively different number of teeth forming virtual tooth rows one with the other, and a cam disc rotatable about an axis and operatively connected with the toothed planet gear for guiding and driving the same, all of the gears having teeth of substantially triangular cross section and flat tooth flanks, each of the virtual tooth rows having tooth gap points disposed on a closed virtual addendum curve having a center of mass located on the axis of rotation of the cam disc, the teeth of the planetary gear flatly engaging on both sides thereof the flanks of at least one of the virtual tooth rowa, the one virtual tooth row having a pitch equal to that of the tooth row of the planet gear so that, in a limiting case, all of the teeth except for the difference in the numbers of teeth of the central gears are in force-transmitting engagement. |
