Transmission for coaxial multi-rotor system
First Claim
1. A coaxial, dual rotor system comprising:
- a first rotor assembly disposed at a rotor axis and rotatable thereabout;
a second rotor assembly disposed at the rotor axis radially inboard of the first rotor assembly and rotatable thereabout;
a rotationally fixed static mast disposed radially between the first rotor assembly and the second rotor assembly; and
a transmission including;
a rotor input shaft including a first sun gear and a second sun gear;
a star gear arrangement operably connected to the first sun gear and the static mast to drive rotation of the first rotor assembly about the rotor axis; and
a planetary gear arrangement operably connected to the second sun gear and the static mast to drive rotation of the second rotor assembly about the rotor axis.
1 Assignment
0 Petitions
Accused Products
Abstract
A coaxial, dual rotor system includes a first rotor assembly located at a rotor axis and rotatable thereabout and a second rotor assembly located at the rotor axis radially inboard of the first rotor assembly and rotatable thereabout. A rotationally fixed static mast is located radially between the first rotor assembly and the second rotor assembly. A transmission includes a rotor input shaft including a first sun gear and a second sun gear. A star gear arrangement is operably connected to the first sun gear and to the static mast to drive rotation of the first rotor assembly about the rotor axis and a planetary gear arrangement is operably connected to the second sun gear and to the static mast to drive rotation of the second rotor assembly about the rotor axis.
13 Citations
15 Claims
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1. A coaxial, dual rotor system comprising:
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a first rotor assembly disposed at a rotor axis and rotatable thereabout; a second rotor assembly disposed at the rotor axis radially inboard of the first rotor assembly and rotatable thereabout; a rotationally fixed static mast disposed radially between the first rotor assembly and the second rotor assembly; and a transmission including; a rotor input shaft including a first sun gear and a second sun gear; a star gear arrangement operably connected to the first sun gear and the static mast to drive rotation of the first rotor assembly about the rotor axis; and a planetary gear arrangement operably connected to the second sun gear and the static mast to drive rotation of the second rotor assembly about the rotor axis. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dual coaxial rotor rotorcraft comprising:
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an airframe; a drive system disposed at the airframe; and a coaxial, dual rotor system operably connected to the drive system including; a first rotor assembly disposed at a rotor axis and rotatable thereabout; a second rotor assembly disposed at the rotor axis radially inboard of the first rotor assembly and rotatable thereabout; a rotationally fixed static mast disposed radially between the first rotor assembly and the second rotor assembly and fixed to the airframe; and a transmission including; a rotor input shaft including a first sun gear and a second sun gear; a star gear arrangement operably connected to the first sun gear and the static mast to drive rotation of the first rotor assembly about the rotor axis; and a planetary gear arrangement operably connected to the second sun gear and the static mast to drive rotation of the second rotor assembly about the rotor axis. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification