US 11,703,117 B2
Hover-capable aircraft
Andrea Bianchi, Samarate (IT); and Sergio Sartori, Samarate (IT)
Assigned to LEONARDO S.P.A., Rome (IT)
Appl. No. 17/294,540
Filed by LEONARDO S.P.A., Rome (IT)
PCT Filed Sep. 30, 2019, PCT No. PCT/IB2019/058287
§ 371(c)(1), (2) Date May 17, 2021,
PCT Pub. No. WO2020/109879, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 18208981 (EP), filed on Nov. 28, 2018.
Prior Publication US 2021/0404547 A1, Dec. 30, 2021
Int. Cl. F16H 57/08 (2006.01); B64C 27/12 (2006.01); F16C 19/38 (2006.01); F16C 23/08 (2006.01); F16C 33/58 (2006.01); F16H 1/28 (2006.01)
CPC F16H 57/08 (2013.01) [B64C 27/12 (2013.01); F16C 19/38 (2013.01); F16C 23/086 (2013.01); F16C 33/581 (2013.01); F16H 1/28 (2013.01); F16C 2326/43 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A hover-capable aircraft (1), comprising:
at least one drive unit (10);
at least one rotor (3, 4); and
a transmission (5) interposed between said drive unit (10) and said rotor (3, 4);
said transmission (5) comprising at least one gear (9a, 9b, 9c, 9d, 9e);
said gear (9a, 9b, 9c, 9d, 9e), in turn, comprising a main body (40) rotatable about a first axis (B) and a plurality of first teeth (13) projecting in a cantilever fashion from said main body (40);
characterized in that said gear (9a, 9b, 9c, 9d, 9e) comprises a first pair of first rings (50, 51) axially opposite to each other and cooperating with said gear (9a, 9b, 9c, 9d, 9e) so as to exert a radial force on the gear (9a, 9b, 9c, 9d, 9e) directed towards said first axis (B);
said first rings (50, 51) being mounted on said body (40) by interference fitting;
each said gear (9a, 9b, 9c, 9d, 9e) comprising a pair of second rings (75, 76) axially opposite to each other and cooperating with said gear (9a, 9b, 9c, 9d, 9e) so as to exert respective radial forces directed away from said first axis (B);
wherein said gear (9a, 9b, 9c, 9d, 9e) comprises a pair of appendages (60, 61) axially projecting in a cantilever fashion from said body (40);
said first rings (50, 51) being forced onto respective said appendages (60, 61);
wherein each said appendage (60, 61) is radially interposed between an associated first ring (50, 51) and a corresponding second ring (75, 76);
wherein each said second ring (75, 76) comprises a respective sixth radially outer side surface (81, 82) with respect to said first axis (B) and cooperating with a corresponding said second surface (64, 65) of a respective said appendage (60, 61).