[특허]Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors

Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64D-035/06
출원번호	US-0903065 (1992-06-22)
발명자 / 주소	Cycon James P. (Orange CT) Kohlhepp Fred W. (Hamden CT) Millea Vincent F. (Stratford CT)
출원인 / 주소	United Technologies Corporation (Hartford CT 02)
인용정보	피인용 횟수 : 37 인용 특허 : 0

초록 ▼

One embodiment of a coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a single stage transmission, a transmission housing, and a center hub support structure that are structurally and functionally interactive. The transmission housing includes upper and lower standpipe housings secured in combination with a middle housing. The single stage transmission includes an input pinion gear rotatably mounted in combination with the middle housing, and upper and lower spiral bevel gears rotatably coupled in combination with the input pinion gear to provide counter-rotation thereof. The spiral bevel gears include integral rotor shafts, respectively, rotatably mounted in the standpipe housings. The hub support structure is configured for securement of the middle housing internally in combination therewith, with respective surfaces thereof in abutting engagement so that dynamic loads of the rotors and thermal loads are directly coupled into the hub support structure via the middle housing while bending moments of the rotors are canceled in the middle housing. The hub support structure has radially extending arms for mounting the coaxial transmission/center hub subassembly in fixed coaxial relation to an airframe structure and for coupling the dynamic and thermal loads to the airframe structure. External surfaces of the standpipe housings function as sliding surfaces for linear motion of swashplate subassemblies to minimize the separation between the rotors so that the airframe structure has a compact aerodynamic and structural envelope. The transmission housing is internally configured to provide a splash lubrication subsystem.

대표청구항 ▼

A coaxial transmission/center hub subassembly for a rotor assembly of an aerial vehicle having ducted counter-rotating rotors defining a rotational axis for the aerial vehicle, the aerial vehicle having a toroidal fuselage with a plurality of inwardly extending radial struts and including an engine, the rotor assembly including upper and lower swashplate subassemblies, comprising: center hub support structure means for mounting said coaxial transmission/center hub assembly in fixed coaxial relation to the toroidal fuselage utilizing the plurality of inwardly extending radial support struts; a multi-member transmission housing including an upper standpipe housing secured in combination with said center hub support structure means, and a lower standpipe housing secured in combination with said center hub support structure means; and a single stage transmission subsystem including an upper bevel gear including an upper rotor shaft rotatably mounted in combination in said upper standpipe housing, a lower bevel gear including a lower rotor shaft rotatably mounted in combination in said lower standpipe housing, said upper and lower rotor shafts providing means for mounting the counter-rotating rotors in combination with said coaxial transmission/center hub subassembly, and an input gear rotatably mounted in combination in said center hub support structures means, said input gear being mechanically coupled in combination with said upper and lower bevel gears and the engine to couple torque therefrom to the counter-rotating rotors; and wherein said upper and lower standpipe housings are secured in combination with said center hub support structure means in opposed relation along the rotational axis of the aerial vehicle; and wherein external surfaces of said upper and lower standpipe housings provide sliding surfaces for bi-directional linear movement of the upper and lower swashplate subassemblies, respectively.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors 원문보기

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Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors 원문보기

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