Differential gearing with phase adjustment
AssigneeWedgtrac Corporation
InventorBertel S. Nelson
Life of this patent
Estimating the term…
Abstract
Differential gearing is provided between an input shaft and an output shaft. The gearing comprises a pair of similar gear sets mounted in confronting, coaxial relation, and may comprise known differential gearing such, for example, as planetary gearing or harmonic drive gearing. A control effects differential speeds between the input and output shafts. A spring loaded friction clutch acts between the input and output shafts, and parallel with the differential gear sets, to reduce the loading on the gear sets, and to provide an essentially zero backlash torque connection between the input and output shafts. The friction clutch may be used to provide loading or drag to a gear set at the end of a series of gears.
Claims17
Differential gearing with phase adjustment comprising a pair of differential gear sets, respectively an input differential and an output differential gear set, said input gear set including an input carrier, a sun gear, a plurality of planet gears and an internal ring gear, said planet gears meshing with said sun gear and with said internal ring gear, means for rotationally driving said input carrier including an input shaft, said output gear set including an output carrier, a sun gear, a plurality of planet gears and an internal ring gear, said last mentioned planet gears meshing with said last mentioned sun gear and said last mentioned internal ring gear, means for respectively rotatively mounting both of said ring gears, an output shaft being connected to said output carrier, and control means connected to both of said ring gears, said control means being adapted to drive said input and said output ring gears at different speeds to effect controlled phase shifting between said input shaft and said output shaft, and friction clutch means acting between said input carrier and said output carrier to minimize backlash and to increase torque capacity.
A power transmission with phase adjustment comprising a pair of similar gear sets, respectively an input gear set and an output set, means for rotationally driving said input gear set including an input shaft, an output shaft connected to an driven by said output gear set, and control means connected to both of said gear sets, said control means being adapted to produce different speeds of said input gear set and said output gear set to effect controlled phase shifting between said input shaft and said output shaft, and friction clutch means acting between said input gear set and said output gear set to minimize backlash and to increase torque capacity.
Differential gearing with phase adjustment comprising a pair of gear sets comprising an input gear set and an output gear set each having a driven gear and a drive gear, the drive gear of said input gear set being coaxial with the driven gear of said output gear set, the driven gear of said input gear set being coaxial with the drive gear of said output gear set, and each driven and drive gear respectively fixed to an output shaft and an input shaft, said gear sets being of different ratios, a carrier, means rotatingly mounting said carrier for rotation coaxially with said driven gear of said output gear set and said drive gear of said input gear set, means connecting the driven gear of said input gear set and the drive gear of said output gear set, means rotatingly mounting said driven gear of said input gear set and said drive gear of said output gear set in said carrier and control means adapted to rotate said carrier to effect controlled phase shifting between said input shaft and said output shaft.
Dependencies are inferred from the claim text.