Retractable restrainer device for rotorcraft rotor blades, and rotor head equipped with it.

摘要

The invention relates to a retractable restrainer device for the articulated rotor blades of rotor craft and to a rotor head having this device.
<??>The device comprises a fixed restrainer (20) with a finger (22) converging radially outwards and projecting radially outwards on the outer reinforcement (10) of the means (7) of articulation of each blade on the hub (3), and a movable restrainer (21) with a receptacle (36) returned elastically (45) into a position fitted onto the finger (22) and released from the finger (22) as a result of the effect of centrifugal force when the rotational speed is higher than a given threshold.
<??>This provides absolute restrainers in terms of flapping and drag in the "ground" position and free restrainers in the "flight" position.
<??>The invention is used for the equipment of helicopter rotors.
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