| 主权项 |
1. A rotary-wing drone (10) comprising a drone body (16) and a plurality of propulsion units (12) each comprising:
a propeller (20) comprising a hub (24) and a plurality of blades (26); and an electric motor (14) of the rotary-cage brushless synchronous type, with a stator connected to the drone body and a rotor mobile about an axis of rotation of the motor for driving the propeller,wherein:
the propulsion unit is of the gearless type; the rotor is rotationally integral with the propeller hub and integral with an upper flange (56) extending in a radial plane with respect to the axis of rotation; and means for gripping the flange are provided,characterized in that it further comprises:
reversible means for the fast coupling of the propeller to the rotor between:
a decoupled position allowing the interlocking of the hub onto the flange, anda locked position in which the hub is mechanically made rotationally integral with the flange,the switching from the decoupled position to the locked position being operated by a relative rotation of the propeller hub with respect to the flange by a fraction of a turn, in an opposite direction with respect to the direction of rotation of the electric motor,and said means for gripping the flange being means for gripping the latter in said locked position. |
