Perpendicular drive mechanism for a missile control actuation system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42B-010/62
F42B-010/64
F42B-010/00
출원번호
US-0938377
(2013-07-10)
등록번호
US-8921749
(2014-12-30)
발명자
/ 주소
Scott, Aaron M.
출원인 / 주소
The United States of America as Represented by the Secretary of the Navy
대리인 / 주소
Saunders, James M.
인용정보
피인용 횟수 :
1인용 특허 :
28
초록▼
A perpendicular drive mechanism for a missile control actuation system employs an electric motor and power shaft operatively coupled to a first spur gear. A lead screw is coupled to a second spur gear. The lead screw is oriented parallel to the motor and perpendicular to a central longitudinal axis.
A perpendicular drive mechanism for a missile control actuation system employs an electric motor and power shaft operatively coupled to a first spur gear. A lead screw is coupled to a second spur gear. The lead screw is oriented parallel to the motor and perpendicular to a central longitudinal axis. The first and second spur gears meshingly engage such that the second spur gear rotates in the opposite direction as the first spur gear. A lead nut threadingly engages with and is configured to move linearly along the central axis of the lead screw. A crank arm is coupled on one end to the lead nut and on the other end to the canard shaft of a canard assembly. As the lead nut moves linearly along the central axis of the lead screw, the crank arm follows the lead nut and causes the canard assembly to actuate.
대표청구항▼
1. A drive mechanism for a control actuation system of a guided missile, comprising: a reversible electric motor for rotating a power shaft, said motor mounted inside and being constrained from free movement by a control actuation system housing having a central longitudinal axis, said power shaft h
1. A drive mechanism for a control actuation system of a guided missile, comprising: a reversible electric motor for rotating a power shaft, said motor mounted inside and being constrained from free movement by a control actuation system housing having a central longitudinal axis, said power shaft having a distal end extending from said motor,a spur gear pinion coupled to the distal end of said power shaft;a lead screw having a proximal and a distal end, said proximal end coupled to a spur gear, wherein said spur gear meshingly engages with said spur gear pinion, said spur gear configured to rotate in the opposite direction of said spur gear pinion;a lead nut threadingly engaged and configured to move linearly along the central axis of said lead screw, wherein said lead nut has at least one integrally-formed pin;a crank arm having at least one slot, wherein said crank arm is coupled to said lead nut by pin-and-slot engagement wherein said at least one slot of said crank arm engages with said at least one integrally-formed pin of said lead nut;wherein said crank arm is fixedly attached to the canard shaft of a canard assembly; andwherein said lead screw is oriented parallel to said motor and perpendicular to said central longitudinal axis. 2. The drive mechanism according to claim 1, said spur gear pinion further comprising a mounting hub and a set screw, wherein said mounting hub and set screw fixedly attach said spur gear pinion to the distal end of said power shaft. 3. The drive mechanism according to claim 1, wherein said spur gear has a diameter greater than or equal to about one and less than or equal to about four times greater than the diameter of said spur gear pinion. 4. The drive mechanism according to claim 1, wherein said lead screw is perpendicular to the canard shaft of said canard assembly. 5. The drive mechanism according to claim 1, further comprising: a potentiometer circuit board mounted to said housing, said potentiometer circuit board configured to measure the position of said crank arm;a potentiometer wiper assembly fixedly attached to said crank arm, said potentiometer wiper assembly in contact with said potentiometer circuit board; andwherein said potentiometer circuit board is configured to transmit crank arm position information to a guidance computer. 6. The drive mechanism according to claim 1, further comprising a lead screw bearing apparatus configured to orient said lead screw parallel to said motor and attached to said housing, said lead screw bearing apparatus configured to provide radial and axial rigidity to said lead screw. 7. A drive mechanism for a control actuation system of a guided missile, comprising: a reversible electric motor for rotating a power shaft, said motor mounted inside and being constrained from free movement by a control actuation system housing having a central longitudinal axis, said power shaft having a distal end extending from said motor;a first spur gear coupled to the distal end of said power shaft;a lead screw having a proximal and a distal end, said proximal end coupled to a second spur gear, wherein said second spur gear meshingly engages with said first spur gear, said second spur gear configured to rotate in the opposite direction of said first spur gear;a lead nut threadingly engaged and configured to move linearly along the central axis of said lead screw, wherein said lead nut has at least one integrally-formed pin;a crank arm having at least one slot, wherein said crank arm is coupled to said lead nut by pin-and-slot engagement wherein said at least one slot of said crank arm engages with said at least one integrally-formed pin of said lead nut;wherein said crank arm is fixedly attached to the canard shaft of a canard assembly; andwherein said lead screw is oriented parallel to said motor and perpendicular to said central longitudinal axis. 8. The drive mechanism according to claim 7, said first spur gear is a spur gear pinion further comprising a mounting hub and a set screw, wherein said mounting hub and set screw fixedly attach said first spur gear to the distal end of said power shaft. 9. The drive mechanism according to claim 7, wherein said second spur gear has a diameter greater than or equal to about one and less than or equal to about four times greater than the diameter of said first spur gear. 10. The drive mechanism according to claim 7, wherein said lead screw is perpendicular to the canard shaft of said canard assembly. 11. The drive mechanism according to claim 7, further comprising: a potentiometer circuit board mounted to said housing, said potentiometer circuit board configured to measure the position of said crank arm;a potentiometer wiper assembly fixedly attached to said crank arm, said potentiometer wiper assembly in contact with said potentiometer circuit board; andwherein said potentiometer circuit board is configured to transmit crank arm position to a guidance computer. 12. The drive mechanism according to claim 7, further comprising a lead screw bearing apparatus configured to orient said lead screw parallel to said motor and attached to said housing, said lead screw bearing apparatus configured to provide radial and axial rigidity to said lead screw. 13. A straddled drive mechanism for a control actuation system of a guided missile, comprising: a missile control section having a control actuation system housing, a control actuation drive system, and a central longitudinal axis;said control actuation drive system, comprising: a first and a second aft drive mechanisms attached to the interior of said control actuation system housing, said first and second aft drive mechanisms operatively coupled by dedicated first and second aft drive mechanism crank arms to a first and second forward canard assembly having a first and second forward canard shaft; anda first and a second forward drive mechanisms attached to the interior of said control actuation system housing, said first and second forward drive mechanisms operatively coupled by dedicated first and second forward drive mechanism crank arms to a first and second aft canard assembly having a first and second aft canard shaft. 14. The straddled drive mechanism according to claim 13, each of said drive mechanisms further comprising: a reversible electric motor for rotating a power shaft, said motor mounted inside and being constrained from free movement by said control actuation system housing, said power shaft having a distal end extending from said motor,a first spur gear coupled to the distal end of said power shaft;a lead screw having a proximal and a distal end, said proximal end coupled to a second spur gear, wherein said second spur gear meshingly engages with said first spur gear, said second spur gear configured to rotate in the opposite direction of said first spur gear;a lead nut threadingly engaged and configured to move linearly along the central axis of said lead screw, wherein said lead nut has at least one integrally-formed pin;wherein each of said drive mechanism crank arms has at least one slot, wherein each of said crank arm is coupled to said lead nut by pin-and-slot engagement wherein said at least one slot of said crank arm engages with said at least one integrally-formed pin of said lead nut;wherein said crank arm is fixedly attached to said dedicated canard shaft; andwherein said lead screw is oriented parallel to said motor and perpendicular to said central longitudinal axis. 15. The straddled drive mechanism according to claim 14, wherein said first spur gear is a spur gear pinion further comprising a mounting hub and a set screw configured to fixedly attach said first spur gear to the distal end of said power shaft. 16. The straddled drive mechanism according to claim 14, wherein said second spur gear has a diameter greater than or equal to about one and less than or equal to about four times greater than the diameter of said first spur gear. 17. The straddled drive mechanism according to claim 14, wherein said lead screw is perpendicular to the canard shaft of said canard assembly. 18. The straddled drive mechanism according to claim 13, further comprising: a potentiometer circuit board mounted to said housing, said potentiometer circuit board configured to measure the position of said crank arm;a potentiometer wiper assembly fixedly attached to said crank arm, said potentiometer wiper assembly in contact with said potentiometer circuit board; andwherein said potentiometer circuit board is configured to transmit crank arm position to a guidance computer. 19. The straddled drive mechanism according to claim 13, further comprising a lead screw bearing apparatus configured to orient said lead screw parallel to said motor and attached to said housing, said lead screw bearing apparatus configured to provide axial and radial rigidity to said lead screw.
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이 특허에 인용된 특허 (28)
Turner,Mark A., Apparatus and method for actuating control surfaces.
Sebestyen George (Weston MA) Sinclair Ronald R. (Moultonboro NH) Smith John A. (Bedford MA) Sands Timothy B. (Acton MA) Nussdorfer Theodore J. (Lexington MA), Canard control assembly for a projectile.
Brieseck Bernd (Henfenfeld DEX) Nagler Josef (Rothenbach DEX), Coupling arrangement between a linear control element and a pivotable element, especially a control surface.
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