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    • 4. 发明专利
    • JOINT TYPE HELICOPTER ROTOR
    • JPH0999900A
    • 1997-04-15
    • JP14750696
    • 1996-06-10
    • AGUSTA SPA
    • SANTEIINO PANKOTSUTEI
    • B64C27/39B64C27/51
    • PROBLEM TO BE SOLVED: To keep the oscillation in all directions of each blade to other than the relatively limited value when the angular speed of a rotor becomes lower than a designated value by limiting the operation on the side to each hub of each blade within a designated value in the engagement position. SOLUTION: A limiting device 44 for limiting the oscillation in the lateral direction to a hub 2 of a blade 4 when the hub 2 is rotated relatively at a low speed or stopped is disposed between each of bridges 9 and a fork 11. A centrifugal pin device 45a comprises a seat part 49 provided in a fixed position to the hub 2, and a pin part or a pin assembly 50 provided in such a manner as to move among the engagement position to the hub 2, the middle position and the release position. In each position of the engagement position, the middle position and the release position, the pin assembly engages with the seat part 49, and partially engages therewith, and the engagement with the seat part 49 is released.