초록 ▼

A split-torque transmission in which a high-speed engine drives a substantially lower speed drive shaft, such as a helicopter rotor drive shaft, comprises a pair of selectively laterally inclined cross shafts for drivingly connecting a corresponding pair of helicopter engines with the helicopter rot

A split-torque transmission in which a high-speed engine drives a substantially lower speed drive shaft, such as a helicopter rotor drive shaft, comprises a pair of selectively laterally inclined cross shafts for drivingly connecting a corresponding pair of helicopter engines with the helicopter rotor drive shaft. The transmission arrangement achieves a relatively high overall speed reduction, such as required in the transmission of power to the main rotor of a helicopter, with a minimum number of reduction stages, gears, and bearings. The lateral inclination of the cross shafts and the adjustable positioning of the associated gears to vary that inclination permits the engines of a two or more engined helicopter to be relatively widely separated and at the same time compact the drive arrangement in the longitudinal direction.

대표청구항 ▼

in a helicopter having a main rotor drive shaft rotatable about a vertical axis and two parallel-mounted engines for powering said rotor drive shaft, a drive transmission for connecting said engines to said rotor drive shaft such that said engines are variably laterally separated from one another co

in a helicopter having a main rotor drive shaft rotatable about a vertical axis and two parallel-mounted engines for powering said rotor drive shaft, a drive transmission for connecting said engines to said rotor drive shaft such that said engines are variably laterally separated from one another comprising: respective input shafts driven by said engines, respective cross shafts connected to said input shafts at lead ends thereof and laterally angled relative to the longitudianl axis of said helicopter such that tail ends thereof are closer to said vertical axis than said lead ends, respective drive pinion means powered from the tail ends of said cross shafts, and a combining gear secured to said rotor drive shaft and powered by said drive pinions spaced about the circumference thereof, the tail ends of said cross shafts being able to extend to said respective drive pinion means at various lateral angles for adjustment of the lateral separation of said engines.