Track over-travel arrestment mechanism for auxiliary supports

Patent metadata

Field	Value
Publication number	US-11208195-B2
Application number	US-201916355478-A
Country	US
Kind code	B2
Filing date	Mar 15, 2019
Priority date	Mar 15, 2019
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A system to arrest flap over-travel employs a track extending from a flap and engaging an auxiliary support. The track has a deployment profile determining flap motion relative to the support structure during travel between an extended position and a normal retracted position. The deployment profile has a transition portion extending beyond the normal retracted position and terminating in a detent. A resiliently mounted catcher is configured to be displaced by the transition portion during over-travel of the flap beyond the normal retracted position and captured in the detent in a maximum retracted position thereby restraining the flap.

First claim

What is claimed is:

1. A system to arrest flap over-travel comprising:
a track extending from a flap to engage an auxiliary support, the track having a deployment profile determining flap motion relative to the auxiliary support during travel between an extended position and a normal retracted position, said deployment profile having a transition portion extending beyond the normal retracted position and terminating in a detent; and,
a resiliently mounted catcher assembly configured to be displaced by the transition portion during over-travel of the flap beyond the normal retracted position and captured in the detent in a maximum retracted position thereby restraining the flap.

2. The system as defined in claim 1 wherein the catcher assembly is mounted to the auxiliary support.

3. The system as defined in claim 1 wherein the catcher assembly reciprocates vertically relative to a direction of travel of the flap.

4. The system as defined in claim 1 wherein the track is secured to and extends forwardly from the flap.

5. The system as defined in claim 4 wherein the track engages at least one air load roller mounted on the auxiliary support.

6. The system as defined in claim 5 wherein the catcher assembly comprises a catcher roller resiliently mounted to the auxiliary support.

7. The system as defined in claim 6 wherein the auxiliary support comprises a first rib spaced from a second rib, said track received between the first rib and second rib and said at least one air load roller supported between the first rib and second rib, and further comprising an axle extending through the catcher roller, said axle mounted to the first rib with a first spring and mounted to the second rib with a second spring.

8. The system as defined in claim 7 wherein the transition portion includes a ramp terminating in the detent, the catcher roller displaced by the ramp in an over-travel condition.

9. The system as defined in claim 8 wherein the track comprises a lower flange having an upper roller surface and an upper flange having a lower roller surface, the at least one air load roller is engaged between the upper roller surface of the lower flange and the lower roller surface of the upper flange and the ramp extends from an upper surface of the upper flange.

10. The system as defined in claim 8 wherein the detent has a depth greater than a radius of the catcher roller.

11. The system as defined in claim 5 wherein the catcher assembly comprises a capture arm rotatably mounted to the auxiliary support, said capture arm having a barb to be received in the detent.

12. The system as defined in claim 11 wherein the barb has an undercut engagement face and the detent has a mating undercut receiving face thereby preventing disengagement when captured.

13. The system as defined in claim 12 wherein the transition portion includes a ramp terminating in the detent, the barb displaced by the ramp in an over-travel condition.

14. The system as defined in claim 13 wherein the track comprises a lower flange having an upper roller surface and an upper flange having a lower roller surface, the at least one air load roller is engaged between the upper roller surface of the lower flange and the lower roller surface of the upper flange and the ramp extends from an upper surface of the upper flange.

15. A system to arrest flap over-travel comprising:
an auxiliary support having a first rib spaced from a second rib with at least one air load roller supported between the first rib and second rib;
a track secured to and extending forwardly from a flap, said track received between the first rib and second rib and engaging the at least one air load roller, the track having a deployment profile determining flap motion relative to the auxiliary support during travel between an extended position and a normal retracted position, said deployment profile having a transition portion extending beyond the normal retracted position and terminating in a detent; and,
a catcher roller having an axle mounted to the first rib with a first spring and mounted to the second rib with a second spring, allowing the catcher roller to be resiliently displaced vertically with respect to a direction of travel of the flap by a ramp in the transition portion during over-travel of the flap beyond the normal retracted position and captured in the detent in a maximum retracted position thereby restraining the flap.

16. The system as defined in claim 15 wherein the track comprises a lower flange having an upper roller surface and an upper flange having a lower roller surface, the at least one air load roller is engaged between the upper roller surface of the lower flange and the lower roller surface of the upper flange and the ramp extends from an upper surface of the upper flange.

17. The system as defined in claim 15 wherein the detent has a depth greater than a radius of the catcher roller.

18. A method for arresting flap over-travel, the method comprising:
engaging a track extending from a flap to an auxiliary support, the track having a deployment profile determining flap motion relative to a support structure during travel between an extended position and a normal retracted position, said deployment profile having a transition portion extending beyond the normal retracted position;
displacing a resiliently mounted catcher in the transition portion of the deployment profile during over-travel of the flap beyond the normal retracted position; and
capturing the resiliently mounted catcher in a detent at a termination of the transition portion in a maximum retracted position thereby restraining the flap.

19. The method as defined in claim 18 wherein the step of displacing comprises receiving a roller in the resiliently mounted catcher on the transition portion and vertically displacing the roller and the step of engaging comprises receiving the roller in the detent.

20. The method as defined in claim 18 wherein the step of displacing comprises receiving a barb, extending from a resilient capture arm, on the transition portion and laterally displacing the barb and the step of capturing comprises receiving the barb in the detent with undercut engagement face of the barb engaging a mating undercut receiving face of the detent.

Assignees

• Boeing Co

Inventors

• Tsai Kevin R
• Gruner Bryan J

Classifications

• B64C9/02 Primary

  Mounting or supporting thereof · CPC title