Attachment of a landing gear

Patent metadata

Field	Value
Publication number	US-10625848-B2
Application number	US-201414489607-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 30, 2013
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A bracket (24) for connecting a traverse (20) of a landing gear to a cabin of a helicopter. A landing gear retainer (5) is fixed around the traverse (20) coaxially to the longitudinal direction of the traverse (20) and at least one cabin clamp mount (7) is fixed to the cabin. The landing gear retainer (5) is in between the cabin and upper and lower pendulum bolts (12, 13) and upper and lower pendulum bearings (18, 19). A pendulum (9) is in longitudinal direction of the traverse (20) hinged to the landing gear retainer (5). The invention is further related to an application of such brackets (24).

First claim

What is claimed is:

1. An attachment bracket of a landing gear to a cabin of a helicopter, the attachment bracket comprising:
a bracket for connecting a traverse of the landing gear to the cabin of the helicopter, the traverse extending in a transverse direction being perpendicular to a longitudinal direction of the cabin;
a landing gear retainer for fixation around the traverse coaxially to the longitudinal direction of the traverse; and
a pendulum extending below the landing gear traverse, the pendulum comprising:
an upper bolt hinged to the landing gear retainer with the upper pendulum bolt in the upper pendulum bearings; and
a lower pendulum bolt hinged to the cabin with the lower pendulum bolt in the lower pendulum bearings, the upper and lower pendulum bolts defining rotational axes parallel to the longitudinal direction of the cabin and thereby providing mobility of the cabin in the transverse direction about the rotational axes; and
compound springs oriented transverse to the pendulum bolts to decrease movement of the landing gear once the pendulum moves in the direction of the compound springs.

2. The attachment bracket according to claim 1 , further comprising at least one stop is provided between a cabin clamp mount and clamp rings.

3. The attachment bracket according to claim 1 , wherein the pendulum comprises at least one rod laterally mounted to the landing gear retainer.

4. The attachment bracket according to claim 1 , wherein the landing gear retainer has a distance ≥0 to the upper pendulum bolts in the respective upper pendulum bearings.

5. The attachment bracket according to claim 1 , further comprising an equal torque support bolt provided for fixation of the landing gear retainer to clamping rings on the traverse.

6. The attachment bracket according to claim 1 , further comprising stop plates with a stiffness >1000 N/mm and friction coefficients between 0.05 and 0.15 are provided between at least one cabin clamp mount and the landing gear retainer.

7. The attachment bracket according to claim 6 , wherein a tolerance of approximately 0.5 mm is provided between the stop plates and the at least one inner cabin clamp mount.

8. A method of application of attachment brackets according to claim 1 , wherein one attachment bracket is mounted on a traverse at the front right and another attachment bracket is mounted on the front left of the traverse.

9. The method of application according to claim 8 , wherein two stops are pairwise arranged symmetrically with regard to a longitudinal direction of the traverse.

10. The method of application according to claim 8 , wherein in respectively neutral positions a pendulum's plane through a right and a further pendulum's plane through a left attachment bracket on one traverse axis are each oriented to a helicopter's center of gravity.

11. An attachment bracket connecting a helicopter cabin extending a longitudinal direction to a landing gear traverse extending in a transverse direction generally perpendicular to the longitudinal direction of the helicopter cabin, the attachment bracket comprising:
a bracket connected to the helicopter cabin;
a landing gear retainer connected to the helicopter cabin and secured around the traverse and coaxial with the transverse direction; and
a pendulum extending below the landing gear traverse, the pendulum comprising:
a lower pendulum bolt in a lower pendulum bearing hinged to the bracket, and;
an upper pendulum bolt in an upper pendulum bearing hinged to the landing gear retainer, at least one of the upper bolt and the lower pendulum bolt defining rotational axes parallel to the longitudinal direction of the helicopter cabin, thereby providing mobility of the helicopter cabin in the traverse direction.

12. The attachment bracket according to claim 11 , further comprising at least one compound spring extending transverse to the lower and upper pendulum bolts, wherein the compound spring acts to decrease movement of the landing gear once the pendulum moves in the direction of the compound spring.

13. The attachment bracket according to claim 12 , wherein the at least compound spring includes a spring bolt and a plurality of springs.

14. The attachment bracket according to claim 11 , wherein the pendulum comprises at least one rod laterally mounted to the landing gear retainer.

15. The attachment bracket according to claim 11 , wherein the landing gear retainer is spaced a distance away from the at least one upper pendulum bolt in the respective upper pendulum bearing.

16. The attachment bracket according to claim 11 , wherein rotation axes of the upper and lower pendulum bearings are perpendicular to the transverse direction and parallel with the longitudinal direction of the helicopter cabin.

17. The attachment bracket according to claim 11 , further comprising an equal torque support bolt arranged to block the landing gear retainer for rotation about the traverse.

18. An attachment bracket connecting a helicopter cabin extending a longitudinal direction to a landing gear traverse extending in a transverse direction generally perpendicular to the longitudinal direction of the cabin, the attachment bracket comprising:
a bracket connected to the helicopter cabin;
a landing gear retainer secured around the landing gear traverse and coaxial with the transverse direction and positioned below the helicopter cabin; and
a pendulum comprising:
a lower pendulum bolt hinged to the bracket and positioned below the landing gear traverse, and
an upper pendulum bolt hinged to the landing gear retainer and positioned above the lower pendulum bolt, the upper bolt defining a rotational axis parallel to the longitudinal direction of the cabin, thereby allowing the helicopter cabin to move in the traverse direction relative to the landing gear traverse.

19. The attachment bracket according to claim 18 , wherein the pendulum further comprises at least one compound spring oriented transverse to the pendulum bolts to decrease movement of the landing gear once the pendulum moves in the direction of the compound springs.

20. The attachment bracket according to claim 19 , wherein the compound spring includes a spring bolt and a plurality of springs.

Assignees

• Airbus Helicopters Deutschland GmbH

Inventors

• Von-Wilmowsky Kaspar
• Markmiller Johannes

Classifications

• B64C2025/325

  specially adapted for helicopters · CPC title

• B64C25/04 Primary

  Arrangement or disposition on aircraft · CPC title

• B64C25/06

  fixed · CPC title

• B64C27/04

  Helicopters · CPC title

• B64C25/52 Primary

  Skis or runners · CPC title