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1. (WO2017137690) DRIVE TRAIN
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/137690 International Application No.: PCT/FR2017/050272
Publication Date: 17.08.2017 International Filing Date: 07.02.2017
IPC:
B64C 27/12 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
64
AIRCRAFT; AVIATION; COSMONAUTICS
C
AEROPLANES; HELICOPTERS
27
Rotorcraft; Rotors peculiar thereto
04
Helicopters
12
Rotor drives
Applicants:
SAFRAN TRANSMISSION SYSTEMS [FR/FR]; 18 Boulevard Louis Seguin 92700 Colombes, FR
Inventors:
DE DREUILLE DE LONGEVILLE, Thomas Marie Joseph; FR
LAISNEZ, Frédéric Nicolas François; FR
Agent:
REGIMBEAU; Parc d'Affaires Cap Nord A 2 allée Marie Berhaut CS 71104 35011 RENNES CEDEX, FR
Priority Data:
165097608.02.2016FR
Title (EN) DRIVE TRAIN
(FR) CHAÎNE MOTRICE
Abstract:
(EN) The invention relates to a drive train (3) for a helicopter (1), which includes an engine (4), a reduction gear (5) and a main gearbox (6), the reduction gear (5) including an output shaft (50), which are received in assembled front (7) and rear (7') housings, said output shaft (50) being supported and guided rotatably by a plurality of rolling bearings (71, 75, 76), mounted in said housings (7, 7'). Said drive train includes a redundant mount (100) arranged around the output shaft (50) and between a wall of said main gearbox (6) and the front end of the front housing (7), and said redundant mount (100) is configured, sized and attached to said wall of the main gearbox (6) and to the front end of the front housing (7) so as to create, if said front housing (7) breaks, a secondary path for absorbing loads passing via said redundant mount (100), via the output shaft (50) of the reduction gear and via said bearings (71, 75, 76).
(FR) L'invention concerne une chaîne motrice (3) pour hélicoptère (1), qui comprend un moteur (4), un réducteur (5) et une boite de transmission principale (6), le réducteur (5) comprenant un arbre de sortie (50), logés dans un carter avant (7) et dans un carter arrière (7')assemblés, ledit arbre de sortie (50) étant supporté et guidé en rotation par plusieurs paliers à roulements(71, 75, 76), monté dans lesdits carter (7, 7'). Cette chaîne motrice comprend un support redondant (100), disposé autour de l'arbre de sortie (50) et entre une paroi de ladite boite de transmission principale (6) et l'extrémité avant du carter avant (7), et ce support redondant (100) est configuré, dimensionné et fixé à ladite paroi de la boite de transmission principale (6) et à l'extrémité avant du carter avant (7) de façon à créer, en cas de rupture dudit carter avant (7), un chemin secondaire de reprises des efforts passant par ce support redondant (100),par l'arbre de sortie (50) du réducteur et par lesdits paliers (71, 75, 76).
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
FR3047471CA3013806CN108602557EP3414158US20190055011