COMPOUND PLANETARY GEAR Russian patent published in 2010 - IPC F16H1/28 

FIELD: machine building.

SUBSTANCE: compound planetary gear consists of case (1), of input shaft (4) with smaller central gears (2, 3), of movable (13) and fixed (12) bigger central gears, and of at least one pair of single-crown satellites (8, 9) mounted on common axle (11) of carrier (7). Sums of number of teeth of the central gears in both steps are equal. Sums of teeth of the central gears and satellites of low-speed planetary step are chosen from parametric rows so, that half of their difference is equal to number of teeth of satellites of this step. Here is disclosed match of numbers of teeth of central gears and satellites of high-speed planetary step. Also there is disclosed formula for calculation of common ratio of gear.

EFFECT: avoiding redundant constraints at simultaneous expanded ranges of change of output parametres of speed and torque, facilitation of low inertia, high rigidity and precision of cinematic constraints, and insensitivity of gear to inaccuracies of fabrication, assembly and deformations of links in operation.

5 cl, 3 dwg