US 11,745,862 B2
Three-steering gear direct-drive coaxial rotor system and flight control method for controlling coaxtal rotor aircraft
Xun Ge, Hunan (CN); Yuan Shen, Hunan (CN); Shuzhen Guo, Hunan (CN); Liangwei Li, Hunan (CN); and Weidong Liu, Hunan (CN)
Assigned to Hunan Taoxun Aviation Technology Co., Ltd., Hunan (CN)
Filed by Hunan Taoxun Aviation Technology Co., Ltd., Hunan (CN)
Filed on Jun. 1, 2021, as Appl. No. 17/335,082.
Application 17/335,082 is a continuation of application No. PCT/CN2020/126687, filed on Nov. 5, 2020.
Claims priority of application No. 201911364527.1 (CN), filed on Dec. 26, 2019.
Prior Publication US 2021/0284330 A1, Sep. 16, 2021
Int. Cl. B64C 27/10 (2023.01); B64C 27/14 (2006.01); B64C 27/80 (2006.01); B64C 27/605 (2006.01)
CPC B64C 27/14 (2013.01) [B64C 27/10 (2013.01); B64C 27/605 (2013.01); B64C 27/80 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A three-steering gear direct-drive coaxial rotor system, comprising an upper rotor power module, an upper rotor assembly, an upper tilting mechanism, a driving steering gear group assembly, a lower tilting mechanism, a lower rotor assembly, a lower rotor power module, an upper fixing mast, and a lower fixing mast; wherein
the upper tilting mechanism comprises an upper swashplate, an upper rotating swashplate, three upper synchronous links and an upper pitch link;
the driving steering gear group assembly comprises an upper fastener, a steering gear group comprising three steering gears, a horn, a center seat, an upper swashplate positioner, a lower fastener and a lower swashplate positioner;
the lower tilting mechanism comprises a lower swashplate, a lower rotating swashplate, three lower synchronous links and a lower pitch link;
the upper fixing mast and the lower fixing mast are respectively mounted on the upper fastener and the lower fastener in the driving steering gear group assembly to form a basic framework of a coaxial rotor aircraft and a rotating shaft around which a rotor rotates;
the upper rotor power module is arranged at an uppermost position of the coaxial rotor system;
the upper rotor assembly is mounted below the upper rotor power module, the upper tilting mechanism is mounted below the upper rotor assembly, the driving steering gear group assembly is mounted below the upper tilting mechanism, the lower tilting mechanism is mounted below the driving steering gear group assembly, the lower rotor assembly is mounted below the lower tilting mechanism, and the lower rotor power module is mounted below the lower rotor assembly;
the steering gear group comprising the three steering gears is fixedly connected to three different positions of the center seat, ends of three horns are fixedly connected to a torque output shaft of the corresponding steering gear, and ends of the three upper synchronous links and ends of the three lower synchronous links are respectively hinged to the other ends of the three horns; the other ends of the three upper synchronous links are hinged to three side extension rods of the upper swashplate; the other ends of the three lower synchronous links are hinged to three side extension rods of the lower swashplate;
the steering gear group comprising the three steering gears directly drives the upper swashplate and the lower swashplate;
the side extension rod of the upper swashplate is connected to the center seat through the upper swashplate positioner or a synchronizer, to limit the circumferential rotation of the upper swashplate;
the side extension rods of the lower swashplate are connected to the center seat through the lower swashplate positioner or a synchronizer, to limit the circumferential rotation of the lower swashplate.