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A drive system for a variable diameter rotor system that includes a plurality of rotor blade assemblies with inner and outer blade segments. The outer blade segment being telescopically mounted to the inner blade segment. The drive system engaging a jackscrew for telescoping the outer blade segment

A drive system for a variable diameter rotor system that includes a plurality of rotor blade assemblies with inner and outer blade segments. The outer blade segment being telescopically mounted to the inner blade segment. The drive system engaging a jackscrew for telescoping the outer blade segment with respect to the inner blade segment. The drive system includes a rotor hub that is pivotally mounted to the upper end of a main rotor shaft about a pivot point. A gimbaled bearing is disposed between and attached to the main rotor shaft and the rotor hub. The gimbaled bearing permits the rotor hub to pivot about the pivot point. A blade actuation shaft is concentrically disposed within the main rotor shaft. The blade actuation shaft has a constant velocity joint pivotally attached to its upper end about the pivot point. A planetary gearset engages the blade actuation shaft with the jackscrew. The planetary gearset includes a sun gear that is attached to the housing and a ring gear that is attached to the rotor hub. A plurality of pinion gears are disposed between and intermesh with the sun gear and the ring gear. The pinion gears are rotatably mounted to a pinion cage which, in turn, is rotatable with respect to the housing and the ring gear. A lower hypoid bevel gear is rotatably driven by the pinion gears and adapted to intermesh with an output pinion on the jackscrew.

대표청구항 ▼

[ What is claimed is:] [1.] A gimbaled rotor hub assembly for a variable diameter rotor system, the system including a plurality of rotor blade assemblies mounted to and rotated by the rotor hub assembly about an axis of rotation, each rotor blade assembly having an inboard blade section and an outb

[ What is claimed is:] [1.] A gimbaled rotor hub assembly for a variable diameter rotor system, the system including a plurality of rotor blade assemblies mounted to and rotated by the rotor hub assembly about an axis of rotation, each rotor blade assembly having an inboard blade section and an outboard blade section, the outboard blade section being telescopically mounted to the inboard blade section, each rotor blade assembly having a mass center, the system further including a jackscrew rotatably disposed within the rotor blade assembly and engaged with the outboard blade section for telescoping the outboard blade section with respect to the inboard blade section, the jackscrew having an output pinion located at its inboard end, the gimbaled rotor hub assembly comprising:a main rotor shaft having an upper end;a rotor hub disposed about the upper end of the main rotor shaft, the blade assemblies being spaced about and attached to the rotor hub;a gimbaled bearing disposed between and engaged with the main rotor shaft and the rotor hub, the gimbaled bearing including first and second elastomeric bearings, each having a partial substantially spherical shape with a substantially common pivot center, the pivot center being located substantially in line with the mass center of the rotor blade assemblies;a blade actuation shaft concentrically disposed within the main rotor shaft, the blade actuation shaft having an upper end;a linear constant velocity joint movably attached to the upper end of the blade actuation shaft, the constant velocity joint having a housing that is rotatably supported by the rotor hub; anda planetary gearset located within the rotor hub assembly includinga sun gear attached to the housing,a plurality of pinion gears disposed about and intermeshing with the sun gear, the pinion gears being rotatably mounted to a pinion cage, the pinion cage being rotatable with respect to the rotor hub and the housing,a lower hypoid bevel gear rotatably driven by the pinion gears, the lower hypoid gear forming a ring within the rotor hub assembly, the lower hypoid bevel gear adapted to intermesh with the output pinion on the jackscrew, anda first ring gear located radially outward from and intermeshing with the pinion gears.