Gear type shaft coupling
Robotic or remotely controlled flying platform
Drive system for tiltrotor aircraft
Twin engine helicopter accesssory drive Patent #: 5108043
ApplicationNo. 903066 filed on 06/22/1992
US Classes:74/665F, Single drive plural driven192/48.92, Including unirotationally engaging clutch-elements244/12.2, Circular416/129, Engine driven416/170R, SPECIFIC DRIVE OR TRANSMISSION MEANS464/156Intermeshing teeth on element and members
ExaminersPrimary: Lorence, Richard M.
Assistant: Ta, Khoi Q.
Foreign Patent References
International ClassesB64C 029/00
AbstractA drive train assembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a sprag clutch, an engine coupling subassembly, a transmission coupling subassembly, and a drive shaft mechanically interconnected at the ends thereof to the engine and transmission coupling subassemblies, respectively. The drive train assembly is design optimized to maximize the functional capability of the sprag clutch, the engine coupling subassembly including an external crown spline coupling, internal spline coupling combination that is mounted in combination with the sprag clutch so that loads transmitted through the external crown spline coupling react through the center of the sprag clutch. Further, the drive train assembly is design optimized to maximize allowable axial, angular, and/or parallel misalignments between the engine and the rotor assembly as a result of the mechanical interconnection of the drive shaft to the external crown spline coupling, internal spline coupling combination of the engine coupling subassembly and to the external crown spline coupling, gear spline coupling combination of the transmission coupling subassembly. The drive shaft is configured as a torque tube having inside and outside diameters sized to provide torsionally soft drive shaft such that the drive shaft functions as a torsional spring to isolate spline coupling teeth, the sprag clutch, transmission gearing, and the rotor assembly from vibratory torque generated by the engine.
Field of SearchIntermediate element located between overlapping surfaces on drive and driven members
Intermeshing teeth on element and members
With disparate device for coupling shaft to additional shaft or rotary body
Torque transmitted via intermeshing teeth on drive and driven members
Oppositely rotating impellers
SPECIFIC DRIVE OR TRANSMISSION MEANS
Single drive plural driven
Helicopter or auto-rotating wing sustained, i.e., gyroplanes
Having plural lifting rotors
Transmission of power
Associated with three or more shafts
Alternatively operative assemblages
Including unirotationally engaging clutch-elements