초록 ▼

A rotor blade assembly includes a flex-beam member and a torque tube surrounding the flex-beam member and extending partially along a rotor blade assembly length. A rotor blade surrounds the flex beam member and extends from the torque tube to a blade tip. A connecting pin assembly secures the rotor

A rotor blade assembly includes a flex-beam member and a torque tube surrounding the flex-beam member and extending partially along a rotor blade assembly length. A rotor blade surrounds the flex beam member and extends from the torque tube to a blade tip. A connecting pin assembly secures the rotor blade and the torque tube at the flex-beam member. The connecting pin assembly includes a first pin member having a first shaft extending at least partially into the rotor blade assembly through the rotor blade from a first rotor blade side and a second pin member located at a second rotor blade side. A clamping load between the first pin member and the second pin member secures the rotor blade and torque tube to the flex-beam member.

대표청구항 ▼

1. A rotor blade assembly comprising; a flex-beam member;a torque tube surrounding the flex-beam member and extending partially along a rotor blade assembly length;a rotor blade surrounding the flex beam member extending from the torque tube to a blade tip; anda connecting pin assembly to secure the

1. A rotor blade assembly comprising; a flex-beam member;a torque tube surrounding the flex-beam member and extending partially along a rotor blade assembly length;a rotor blade surrounding the flex beam member extending from the torque tube to a blade tip; anda connecting pin assembly to secure the rotor blade and the torque tube at the flex-beam member, the connecting pin assembly including: a first pin member having a first shaft extending at least partially into the rotor blade assembly through the rotor blade from a first rotor blade side; anda second pin member disposed at a second rotor blade side; wherein a clamping load between the first pin member and the second pin member secures the rotor blade and torque tube to the flex-beam member. 2. The rotor blade assembly of claim 1, further comprising a threaded connection between the first pin member and the second pin member. 3. The rotor blade assembly of claim 1, wherein the second pin member includes a second shaft extending at least partially into the rotor blade assembly through the rotor blade from a second rotor blade side. 4. The rotor blade assembly of claim 1, wherein the first shaft has a shaft diameter in the range of about 2½ to 3 inches. 5. The rotor blade assembly of claim 1, wherein the clamping load is between a first head of the first pin member and a second head of the second pin member. 6. The rotor blade assembly of claim 5, wherein the first head and/or the second head have a head diameter in the range of about 3½ to 4 inches. 7. The rotor blade assembly of claim 1, wherein the clamping load is about 1000 pounds force. 8. The rotor blade assembly of claim 1, wherein the first pin member and the second pin member are substantially flush with an outer surface of the rotor blade. 9. The rotor blade assembly of claim 1, wherein the torque tube and the rotor blade are formed as a unitary component. 10. A rotor assembly for a rotor craft comprising: a rotor hub; anda plurality of rotor blades assemblies, each rotor blade assembly including: a flex-beam member secured to the rotor hub;a torque tube surrounding the flex-beam member and extending partially along a rotor blade assembly length;a rotor blade surrounding the flex beam member extending from the torque tube to a blade tip; anda connecting pin assembly to secure the rotor blade and the torque tube at the flex-beam member, the connecting pin assembly including: a first pin member having a first shaft extending at least partially into the rotor blade assembly through the rotor blade from a first rotor blade side; anda second pin member disposed at a second rotor blade side;wherein a clamping load between the first pin member and the second pin member secures the rotor blade and torque tube to the flex-beam member. 11. The rotor assembly of claim 10, further comprising a threaded connection between the first pin member and the second pin member. 12. The rotor assembly of claim 10, wherein the second pin member includes a second shaft extending at least partially into the rotor blade assembly through the rotor blade from a second rotor blade side. 13. The rotor assembly of claim 8, wherein the first shaft has a shaft diameter in the range of about 2½ to 3 inches. 14. The rotor assembly of claim 10, wherein the clamping load is between a first head of the first pin member and a second head of the second pin member. 15. The rotor assembly of claim 14, wherein the first head and/or the second head have a head diameter in the range of about 3½ to 4 inches. 16. The rotor assembly of claim 10, wherein the clamping load is about 1000 pounds force. 17. The rotor assembly of claim 8, wherein the first pin member the second pin member are substantially flush with an outer surface of the rotor blade. 18. The rotor assembly of claim 8, wherein the torque tube and the rotor blade are formed as a unitary component. 19. A helicopter comprising: an airframe;a drive system; anda rotor assembly operably connected to the drive system including: a rotor hub; anda plurality of rotor blades assemblies, each rotor blade assembly including: a flex-beam member secured to the rotor hub;a torque tube surrounding the flex-beam member and extending partially along a rotor blade assembly length;a rotor blade surrounding the flex beam member extending from the torque tube to a blade tip; anda connecting pin assembly to secure the rotor blade and the torque tube at the flex-beam member, the connecting pin assembly including: a first pin member having a first shaft extending at least partially into the rotor blade assembly through the rotor blade from a first rotor blade side; anda second pin member disposed at a second rotor blade side;wherein a clamping load between the first pin member and the second pin member secures the rotor blade and torque tube to the flex-beam member. 20. The helicopter of claim 19, further comprising a threaded connection between the first pin member and the second pin member. 21. The helicopter of claim 19, wherein the second pin member includes a second shaft extending at least partially into the rotor blade assembly through the rotor blade from a second rotor blade side. 22. The helicopter of claim 19, wherein the first shaft has a shaft diameter in the range of about 2½ to 3 inches. 23. The helicopter of claim 19, wherein the clamping load is between a first head of the first pin member and a second head of the second pin member. 24. The helicopter of claim 23, wherein the first head and/or the second head have a head diameter in the range of about 3½ to 4 inches. 25. The helicopter of claim 19, wherein the clamping load is about 1000 pounds force. 26. The helicopter of claim 19, wherein the first pin member and the second pin member are substantially flush with an outer surface of the rotor blade.