IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0040340
(2011-03-04)
|
등록번호 |
US-8668163
(2014-03-11)
|
발명자
/ 주소 |
- Colantonio, David N.
- Milsom, Derek C.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
9 |
초록
▼
A steering system for aircraft landing gear can be used, for example, for controlling one or more axles of a bogie style landing gear system, such as, but not limited to, a six-wheel bogie style landing gear system. The steering system includes a rack having a plurality of rack teeth. An actuator is
A steering system for aircraft landing gear can be used, for example, for controlling one or more axles of a bogie style landing gear system, such as, but not limited to, a six-wheel bogie style landing gear system. The steering system includes a rack having a plurality of rack teeth. An actuator is operatively connected to move the rack in a linear direction. A pinion has a plurality of pinion teeth in meshing engagement with the rack teeth. The pinion includes a pinion body extending between the pinion teeth and a pinion pivot that is spaced apart from the pinion teeth. The actuator, rack, and pinion are configured and adapted so that linear motion of the rack imparted by the actuator results in rotation of the pinion about the pinion pivot for steering landing gear wheels.
대표청구항
▼
1. A landing gear steering system comprising: a) a rack having a plurality of rack teeth;b) an actuator operatively connected to move the rack in a linear direction; andc) a pinion having a plurality of pinion teeth in meshing engagement with the rack teeth, wherein the pinion includes a pinion body
1. A landing gear steering system comprising: a) a rack having a plurality of rack teeth;b) an actuator operatively connected to move the rack in a linear direction; andc) a pinion having a plurality of pinion teeth in meshing engagement with the rack teeth, wherein the pinion includes a pinion body extending between the pinion teeth and a pinion pivot that is spaced apart from the pinion teeth,wherein the actuator, the rack, and the pinion are configured and adapted so that linear motion of the rack imparted by the actuator results in rotation of the pinion about the pinion pivot which steers at least one landing gear wheel which is mounted on an axle,wherein a lever arm of the pinion extends aft from the pinion pivot,wherein the axle is pivotally mounted and includes an aft extending lever arm, andwherein the lever arms of the pinion and the pivotally mounted axle are operatively connected together by a pin member that is substantially parallel to a common axis of rotation of the pinion and the pivotally mounted axle. 2. The landing gear steering system as recited in claim 1, further comprising a sensor for detecting an amount of travel of the rack in the linear direction. 3. The landing gear steering system as recited in claim 2, wherein the sensor is a linear variable displacement transducer. 4. The landing gear steering system as recited in claim 2, wherein the sensor is mounted proximate the actuator. 5. The landing gear steering system as recited in claim 1, further comprising a sensor for detecting an amount of rotation of the pinion. 6. The landing gear steering system as recited in claim 1, wherein the actuator includes a stationary actuator housing and a moving member operative to move in a linear direction relative to the actuator housing, and wherein the rack is configured to be selectively locked against motion relative to the actuator housing. 7. The landing gear steering system as recited in claim 6, further comprising a lock actuator mounted to the actuator housing, wherein the lock actuator is configured to selectively engage a locking mechanism with the rack to lock the rack against motion relative to the actuator housing. 8. The landing gear steering system as recited in claim 7, wherein the rack includes a recess for receiving the locking mechanism to lock the rack against motion relative to the actuator housing. 9. The landing gear steering system as recited in claim 8, wherein the locking mechanism is biased toward engagement with the recess of the rack. 10. The landing gear steering system as recited in claim 9, wherein the locking mechanism is mounted for motion in a direction substantially perpendicular to the pinion pivot. 11. The landing gear steering system as recited in claim 9, wherein the locking mechanism is mounted for motion in a direction substantially parallel to the pinion pivot. 12. The landing gear steering system as recited in claim 1, wherein the pinion body includes a lever arm extending away from the pinion pivot for engaging a steerable landing gear axle. 13. The landing gear steering system as recited in claim 1, wherein the actuator is configured to be energized by an aircraft power system. 14. The landing gear steering system as recited in claim 1, wherein the actuator includes two hydraulic piston heads, each mounted to an opposite end of the rack, each hydraulic piston head being configured to impart linear motion onto the rack in response to hydraulic pressure applied to the hydraulic piston heads. 15. An aircraft landing gear steering system comprising: a) a bogie beam having a plurality of landing gear axles mounted thereto, wherein one of the axles is pivotally mounted to the bogey beam for landing gear steering;b) an actuator mounted to the bogie beam and having a moving member operative to move in a linear direction relative to the bogie beam;c) a rack having a plurality of rack teeth, and being mounted to the moving member of the actuator for linear motion relative to the bogie beam; andd) a pinion having a plurality of pinion teeth in meshing engagement with the rack teeth, wherein the pinion includes a pinion body extending between the pinion teeth and a pinion pivot mounted to the bogie beam, the pinion body including a lever arm extending away from the pinion pivot, wherein the lever arm is operatively connected to the pivotally mounted axle such that linear motion of the moving member of the actuator results in rotation of the lever arm about the pinion pivot to rotate the pivotally mounted axle relative to the bogie beam for landing gear steering, wherein the lever arm of the pinion extends aft from the pinion pivot, and wherein the pivotally mounted axle includes an aft extending lever arm, and wherein the lever arms of the pinion and the pivotally mounted axle are operatively together by a pin member that is substantially parallel to a common axis of rotation of the pinion and the pivotally mounted axle. 16. The landing gear steering system as recited in claim 15, wherein the pivotally mounted axle and the pinion are both configured to pivot about a common axis of rotation in response to linear motion of the rack. 17. The landing gear steering system as recited in claim 15, further comprising a locking mechanism configured to lock the pinion and pivotally mounted axle relative to a bogie beam to prevent pivoting of the pivotally mounted axle. 18. The landing gear steering system as recited in claim 15, wherein there are three axles mounted to the bogie beam, and wherein the pivotally mounted axle is aft most of the three axles. 19. The landing gear steering system as recited in claim 15, wherein the moving member of the actuator includes two hydraulic piston heads, each mounted to an opposite end of the rack from the other, each hydraulic piston head being configured to impart linear motion onto the rack relative to the bogie beam in response to hydraulic pressure applied to the hydraulic piston heads.
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