초록 ▼

On the rotor, between each blade and the member for linking with the hub, an electrical connecting cable comprises a first section of which one part is held above that one of the two blade pins which is the detachable pin whose withdrawal allows the folding of the blade by pivoting about the other b

On the rotor, between each blade and the member for linking with the hub, an electrical connecting cable comprises a first section of which one part is held above that one of the two blade pins which is the detachable pin whose withdrawal allows the folding of the blade by pivoting about the other blade pin forming a pivot pin, by holding means tied to this detachable pin, in the flight position of the blade. This section of cable is released from its holding means before the withdrawal of the latter and of the detachable blade pin, which precedes the folding, in such a way that this section of cable deforms naturally on following the pivoting of the blade. After deployment of the blade, a part of the section of cable is again held in the holding means, in the flight position of the blade.

대표청구항 ▼

1. A rotary-wing aircraft rotor, comprising:a hub, designed to be driven in rotation about an axis of the hub which is the axis of rotation of the rotor, at least two blades, each of which is connected to the hub by a link member that is substantially radial with respect to the axis of rotation, and

1. A rotary-wing aircraft rotor, comprising:a hub, designed to be driven in rotation about an axis of the hub which is the axis of rotation of the rotor, at least two blades, each of which is connected to the hub by a link member that is substantially radial with respect to the axis of rotation, and having a radially outer end shaped like a fork in which the corresponding blade has a root held by two blade pins substantially parallel with each other and each one traversing aligned bores in the fork and the blade root, at least one blade being foldable on one side of the rotary wing aircraft and having at least one detachable blade pin, such that the withdrawal of said detachable pin from the blade root and from the fork of the link member, after withdrawing at least a first detachable member for retaining said detachable blade pin in said fork, allows the pivoting of said blade about the other pin forming a blade pivot pin, and an electrical connection installation comprising, for each blade, at least one electrical connecting cable connecting a first connector, carried by the hub and electrically connected on the latter, to a second connector on the blade and connected to at least one electrical equipment of said blade, wherein the connecting cable, for at least one foldable blade, comprises a first flexible section, of essentially cylindrical shape with a rounded cross section, connecting said second connector to a first end, in a radially outer position, of a second section, held on the corresponding link member, of said connecting cable, whose first section comprises a releasable part which, in the flight configuration of the blade, is maintained above the detachable blade pin by holding means tied to said detachable blade pin, and also detachable to be able to be withdrawn before the folding of the blade, said holding means being arranged in such a way as to allow a manual release of the releasable part before their withdrawal, such that said releasable part is manually released from said holding means before their withdrawal and such that the folding of the blade by pivoting about said pivot pin causes the first section of cable to curve and move naturally in order to accommodate itself to said folding without disconnection at the level of the second connector. 2. A rotor according to claim 1, wherei n said holding means comprise a cradle formed in an upper end, protruding above said fork, of a cable holding pin, engaged in said detachable blade pin, and held in the latter by at least a second detachable holding member, said releasable part being held, in the flight configuration of the blade, in said cradle by at least one detachable holding component, such that after the detachment of said detachable holding component and the withdrawal of said first and second detachable holding members, the releasable part of said first section of cable can be released manually from the cradle, and said detachable blade pin and cable holding pin can be withdrawn from said fork and from the blade root, for the folding of the blade. 3. A rotor according to claim 2, wherein the cable holding pin is fitted in a detachable manner in the detachable blade pin, which is tubular, by engagement in said detachable blade pin, substantially along the axis of the latter, and said second detachable holding member comprises at least one spring pin, intended to traverse said detachable blade pin transversely and to be engaged in at least one recess of said cable holding pin in such a way as to hold the latter substantially axially in the detachable blade pin. 4. A rotor according to claim 3, wherein said first detachable holding member also comprises at least one spring pin, intended to traverse said detachable blade pin transversely in a lower end protruding under the fork of the corresponding link member, in such a way as to lock said detachable blade pin in the position of holding the blade root in said fork, in the flight configuration of the corresponding blade, said spring pin constituting simultaneously said second detachable holding member intended to hold the cable holding pin in the detachable blade pin. 5. A rotor according to claim 2, wherein said releasable part of the first section of cable, which is intended to be held in a detachable manner in said cradle, is delimited between two over-mouldings of excess thickness on the first section of cable in such a way as to lock said releasable part in translation in the cradle. 6. A rotor according to claim 2, wherein said detachable holding component comprises at least one other detachable pin, intended to traverse the cradle transversely above said releasable part of the fi rst section of cable, in such a way as to hold said releasable part in the cradle. 7. A rotor according to claim 2, wherein said detachable holding component comprises at least one hook articulated on a side of the cradle and closable on the opposite side of the cradle, upon which the hook is intended to be fixed, by at least one other detachable spring pin, in such a way as to hold said releasable part in the cradle. 8. A rotor according to claim 2, wherein said cable holding pin is free in rotation in said detachable blade pin about the axis of the latter. 9. A rotor according to claim 1, wherein said second section of connecting cable extends over said link member, in a direction inclined with respect to the longitudinal axis of said link member, and such that a first end of said second section, in a radially outer position, is offset laterally towards the outside and held on said link member by a collar integral with a mount fixed on the link member. 10. A rotor according to claim 1, wherein the second section of cable has an elongated part of substantially flattened rectangular cross section, maintained substantially flat on the top of said link member. 11. A rotor according to claim 1, wherein said second section of cable is connected to the first connector on the hub by a third section of the connecting cable, said third section comprising an overhead hook, in the shape of a flattened half-loop, of substantially flattened rectangular cross section whose largest dimension is substantially perpendicular to the axis of rotation, and whose concavity is facing substantially towards holding and articulation means connecting the corresponding link member to the hub, and substantially radially towards the axis of rotation, said overhead hook being deformable in flexion and torsion in order to accommodate itself to the angular deflections in pitch, drag and flapping of the blade and corresponding link member with respect to the hub. 12. A rotor according to claim 11, wherein the second section of cable is connected to the overhead hook of the third section of cable by a joint connected to the link member by a link which is articulated at least in pivoting manner about an axis substantially parallel with or slightly inclined with respect to the longitudinal pitch change axis of the link member and of the blade.