IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0380287
(1982-05-20)
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발명자
/ 주소 |
- Hodgman, John R.
- Weil, Jack M.
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대리인 / 주소 |
Burns, Doane, Swecker & Mathis
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인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
Standard aircraft engine accessories like generators, alternators, fuel pumps, vacuum pumps, or air pumps are dually mounted on compact, remotely operable clutch members flanged to standard engine mounting pads for direct engine drive. The clutch member includes complementary mounting pads for such
Standard aircraft engine accessories like generators, alternators, fuel pumps, vacuum pumps, or air pumps are dually mounted on compact, remotely operable clutch members flanged to standard engine mounting pads for direct engine drive. The clutch member includes complementary mounting pads for such engine mount and has a throughbore for rotatably supporting a pair of journaled shafts respectively carrying, driving and drive clutch plates and power operating means for longitudinally shifting one of the plates to engage the other. One shaft includes a connection for a spool-type safety coupling to drive a spline shaft extending beyond the engine mounting pad to engage an engine driven gear. The other shaft includes complementary connection for a spool-type safety coupling for driving the engine accessory. The clutch body may be used for mounting any (or all) engine accessory power unit or used solely for mounting stand-by or auxiliary (duplicate) power units that need not be run until commanded to do so, either during pre-flight check-out or to replace a non-functioning power unit during flight. The compact, lightweight clutch member, needs no revision of aircraft or engine structure to provide reliable back-up functions for continued operation of an engine during flight without interconnection to other engines or external power sources for such functions (e.g. electrical power). The clutch unit greatly improves both operability and reliability of an aircraft engine during flight. Further, it substantially enhances the safety of air flight, especially in single engine aircraft.
대표청구항
▼
1. A clutch and mounting assembly for connection between an aircraft engine accessory such as an alternator, a generator, a fuel pump, or the like, and an engine mounting pad to which the engine accessory could also be directly connected, the clutch and mounting assembly comprising: a body member
1. A clutch and mounting assembly for connection between an aircraft engine accessory such as an alternator, a generator, a fuel pump, or the like, and an engine mounting pad to which the engine accessory could also be directly connected, the clutch and mounting assembly comprising: a body member having a pair of substantially parallel mounting surfaces, one of said mounting surfaces being substantially identical to a mounting pad of the engine and being adapted for connection to the accessory, the other one of said mounting surfaces being substantially identical to an end surface of an accessory and being adapted for connection to a mounting pad of the engine, so that the body member can be inserted between an accessory and a mounting pad; and clutch means in said body member including a first member engageable with a mounting pad, a second member engageable with an accessory, the clutch means being operable for selectively providing driving engagement between the first and second members. 2. A clutch and mounting assembly for an aircraft engine accessory such as an alternator, a generator, fuel pump, or the like, which accessory has a mounting pad and which assembly is designed to be mounted to an aircraft engine mounting pad, the clutch and mounting assembly comprising: a body member having a cylindrical chamber formed therethrough; a pair of mounting surfaces transverse to said cylindrical chamber, said mounting surfaces being substantially parallel, one of said mounting surfaces being substantially identical to a mounting pad of an engine accessory and one of said mounting surfaces being substantially identical to a corresponding mounting pad of an aircraft engine, said identical parallel mounting pads being disposed at opposite ends of said chamber so that the body member can be inserted between an accessory and a mounting pad; means for securing one of said parallel pads to an aircraft engine mounting pad, the other of said parallel pads including means for mounting an engine accessory; a pair of shafts independently supported for rotation within said chamber, the outer end of each shaft including a drive flange having a plurality of drive pins extending outwardly for connection to a drive spool, one of said drive spools being connectable to an engine drive spline, a clutch plate mounted on the inner end of each of said shafts, each plate carrying a friction member, one of said plates being axially movable on its shaft for engagement with the other of said plates; bearing means supported directly in one end of said chamber for rotatably mounting one of said shafts; annular power means supported in the outer end of said chamber, bearing means supported by the inner diameter of said annular power means for rotatably mounting the other of said shafts, and means for operating said annular power means; said annular power means including means for exerting axial force on said axially moveable clutch plate in response to said operating means; whereby said clutch plates may be engaged or disengaged to selectively drive an aircraft engine accessory in response to actuation of said annular power means. 3. A mounting clutch assembly in accordance with claim 1 wherein said annular power means is an electromagnetic solenoid and said means for exerting an axial force on said movable clutch plate is a magnetic circuit including said pair of rotatable shafts, said bearing of means within said solenoid and said clutch plates. 4. A mounting clutch assembly in accordance with claim 1 wherein said axially moveable clutch plate includes a plurality of back-lash spring means between said clutch plate and its rotating support shaft. 5. In an aircraft power plant having a plurality of mounting pads for supporting power accessories, such as generators, alternators, fluid pumps and the like, the improvement comprising: a clutch and mounting assembly for selectively driving such an accessory only when required for operation of said power plant so that unnecessary wear, tear and breakage of said accessory is avoided, said mounting assembly including: a body member having an outer periphery substantially the same as said power plant mounting pad, a pair of parallel end surfaces at opposite ends of said body member, one of said end surfaces being constructed and arranged to mate with one of the mounting pads, the other of said end surfaces constructed and arranged to mate with an accessory which ordinarily mates to that mounting pad, a through bore in said body member whose axis is perpendicular to said parallel end surfaces, the body member being insertable between the mounting pad and the accessory; said bore having a series of steps of progressively increasing diameters, a first shaft including a drive flange positioned in the smallest diameter of said bore, a journal bearing means for supporting the axial center of said first shaft in the adjacent step of said bore, a clutch plate supported for rotation on the other end of said first shaft, said clutch plate being within the next adjacent portion of said bore, a second shaft including a drive flange extending axially toward the other end of said bore, a clutch plate on the inner end of said second shaft, bearing support means for said second shaft between said clutch plate and said drive flange, said bearing support including sleeve means within an annular solenoid means mounted adjacent the end of said bore and having the greatest diameter, said annular solenoid means including electrical circuit means for energizing said solenoid means upon demand, said annular solenoid being electromagnetically coupled through said sleeve, said shaft and clutch plate of said second shaft to said first shaft and said first shaft clutch plate to exert an axial magnetic force to one of said plates to thereby engage the driving faces of said plates upon command to couple a non-rotating power plant accessory to said power plant through said clutch plates and said shafts. 6. The aircraft power plant of claim 4 having plural sets of redundant accessories in which one accessory of each set of said redundant accessories is mounted on said engine through a separate mounting clutch. 7. A method of operating duplicate aircraft engine accessories adapted to be driven in synchronism with said engine to assure that at least one of said duplicate units is continuously operable with said engine which method comprises mounting both of said duplicative units on said engine for synchronous drive by said engine, attaching a mounting clutch assembly to the engine having a mounting surface on one end duplicating the mounting surface of said accessories for direct mounting on said engine, the side walls of said mounting clutch being an axial extension of said mounting area, the other end of said mounting clutch having a mounting surface duplicating the mounting surface for said accessory on said engine, and an axially moveable clutch within said mounting clutch, said clutch including a driving member and a driven member and an axial force generating means, securing one of said duplicate units directly to the mounting clutch assembly such that the driving clutch member is continuously driven in synchronism with said engine and the driven clutch member is directly coupled to said engine accessory, and selectively engaging said mounting clutch to couple said driven clutch member to said driving clutch member only when required for continued operation of said engine or for checking its operability for such service.
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