Patent CA-3098033-A1 (CA)
Title: Electromechanical actuator pump
Inventor: ALLEN JASON BRADLEY
IPC: B64C25/22
Filed: 2020-11-02
Abstract: AB STRACT A nose landing gear system is disclosed. In various embodiments, the nose landing gear system includes an electric motor; a hydraulic pump connected to the electric motor; a gearbox connected to the electric motor; and a clutch configured to mechanically couple the gearbox to a steering collar.   Date Recue/Date Received 2020-11-02 Z 100                                   . 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(j                                                               ----(-1 \                            -1--, 341                             DIRECTIONAL                             r_ 339     V    CONTROL VALVE                                                                                   t-,-- 332 315 ---,--  _____________ 1----.2--358          --,-- 362 DOOR      I   __________________ ACTUATOR _____________ I : AUXILIARY _ - _                          _, M   1 ________________________________________________________________________ VALVE   =                                       352 ___________________________________ UPLOCK                     j ACTUATOR    1    = __ 1 _______________________________________________________________________________ ______________________________ 1: - , -_23-38- _  1 _______________________________________________________________________________ __ DOWNLOCK             _ _3_36 _ _1 ACTUATOR        RETRACT    r 334 ACTUATOR      I    1---µ- 365 FIG.3 n,                                                         /9 5. x a, .             406 5. x \-k V  ¨1--468 .                                                                        439 .. õ                                                                                                \-=5_s__.., cb                                                    õ---: "                      466 441                           z   _______________________ '  __ \A  , \-\V 476                                                 X 7  __ V  A/                                                                             c=r---- 456 /  ---..... 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X _______________________________________________________________________________ ,    <   I     I 460                                                         I          7 __ v_ FIG.4A                                                                     471 5.1' 'D x ,,-(1 ), 5.2               406 x \-\     oo a.  r.) --.4 __________________________________________________________________ --,_, _________________ /                                                                                                         71-,_ 479 cb / r.) :      /    V ¨ A v \         \A                                                        T  - '    V\  P\   7 -__) _______________________________________________________________________________ ___ -> _______ < __ -"- 469 477 ..,..     ,, (5/ 5                                                          5 441 ---....\ 7 458 ------      i-\\ \    ?4  N I  <C4-." 483 ,_r¨ 467 415 -"--- \                                                    -44.-482   _i-- 438 -  I        õ OEN I  ___________________________________________________________________________ 0 /4/\/     ".`==I'' 473 ' ' I ' 464 b yr' 444 f.' ______________ C V                   i _______________________________________________________________________________ _ <   I -\\     I                                                                                      r- 434 _1  __ I   __________________________________________________________ 460        I    0( v 465    ' FIG.4B     F D .  'D x , r` 1 ' , \-k X oo a.  r.) la9 cb                         466 \-\                                                          V\   / __ /      T  r.) /                                                                        .          \ - i ,                  N  A         VA/   _______________________________________________________________________________ ________ ...-    ..  __ .-.                                                                                 5  _______ ¨%--  441    469 -__)                                                         1 I \                           \ -L     / \ /                   1 5 ,--- 475 I                                                                                                 a 452 õ, 462                                                           483 7 ,¨ 467 4-=--- __________________________________________________________________ 415 ¨"---=                           I 458 ...--                                                          -44.-----------_r¨ 438 _______________________________________________________________________________ ___________ õ   1                    444 X7' LI '_\ ,, V    ,.4.- 464        b   1 \ 442 440 450                                                I  ___________________  <  --------- I / I 480                                                          I            i v _______________________________________________________________________________ ______________ I  __________________________________________________  460     I ___________________________________________________________ -*\--- 465 1 FIG.4C                                                                              fl DRIVE AN ELECTRIC MOTOR CONNECTED TO A HYDRAULIC PUMP AND TO A GEARBOX                                         [-\--, CIRCULATE A HYDRAULIC FL ID WITHIN A RECIRCULATION 1--"\-, 504 HYDRAULIC CIRCUIT VIA THE HYDRAULIC PUMP  STEER A NOSE LANDING GEAR ASSEMBLY VIA THE                              h\--, GEARBOX AND A CLUTCH FIG.5 Date Recue/Date Received 2020-11-02 fl PRESSURIZE AN ACCUMULATOR TO A LEVEL SUFFICIENT TO   STEERING COLLAR VIA A GEARBOX  ENERGIZE A CLUTCH CONTROL VALVE TO ENGAGE THE   HYDRAULIC PUMP AND TO THE GEARBOX    HYDRAULIC CIRCUIT VIA THE HYDRAULIC PUMP STEER A NOSE WHEEL CONNECTED TO A NOSE LANDING GEAR   COUPLED TO THE CLUTCH  FIG.6 Date Recue/Date Received 2020-11-02