Method for mounting an axle in a bogie, and associated installation
A method and system for mounting an axle in a bore of a bogie mounted on a landing gear of an aircraft, the landing gear being in a gear-down position, the bore extending in a substantially horizontal direction referred to as the axle installation direction, between a first open end and a second open end are disclosed. The method includes a) supplying a mobile bearing structure ( 30 ) comprising means for moving the axle ( 12 ) which are able to move along a direction substantially parallel to the axle installation direction, b) installing the axle ( 12 ) on the means for moving the axle, c) aligning the axis (C) of the axle ( 12 ) with the axis (B) of the bore ( 14 ), and d) inserting the axle ( 12 ) into said bore ( 14 ) of the bogie ( 16 ) by moving the means for moving the axle ( 12 ) along the direction substantially parallel to the axle installation direction.
1 . A method for mounting an axle ( 12 ) in a bore ( 14 ) of a bogie ( 16 ) mounted on a landing gear ( 18 ) of an aircraft, the landing gear ( 18 ) being in a gear-down position, the bore ( 14 ) extending in a substantially horizontal direction referred to as the axle installation direction, between a first open end ( 14 a ) and a second open end ( 14 b ), the method comprising:
a) supplying a mobile bearing structure ( 30 ) comprising means for moving the axle ( 12 ) which are able to move along a direction substantially parallel to the axle installation direction,
b) installing the axle ( 12 ) on the means for moving the axle,
c) aligning the axis (C) of the axle ( 12 ) with the axis (B) of the bore ( 14 ), this step comprising:
positioning a reference mark ( 110 ) on the mobile bearing structure ( 30 ) and in such a manner that the axis (B) of the bore ( 14 ) intercepts said reference mark ( 110 ), and
positioning the axle ( 12 ) so that the axis (C) is aligned with said reference mark ( 110 ) along the installation direction,
d) inserting the axle ( 12 ) into said bore ( 14 ) of the bogie ( 16 ) by moving the means for moving the axle ( 12 ) along the direction substantially parallel to the axle installation direction.
2 . The method according to claim 1 , comprising a step, prior to step d), which comprises introducing the axle ( 12 ) in a horizontal position into a tank ( 90 ) filled with liquid nitrogen, for a given time.
3 . The method according to claim 2 , wherein the reference mark ( 110 ) is arranged in a vertical plane comprising the installation direction, the vertical plane corresponding to a lifting plane of the axis (C) of the axle ( 12 ).
4 . The method according to claim 3 , comprising the mounting of a laser beam device ( 120 ) in the bore ( 14 ) of the bogie so that an axis of the laser beam is coaxial with the axis (B) of the bore ( 14 ) of the bogie.
5 . The method according to claim 4 , wherein step d) is preceded by a step comprising the mounting of a sleeve ( 150 ) around a first end ( 12 a ) of the axle ( 12 ), said first end being arranged facing the bore ( 14 ) of the bogie along the axle installation direction.
6 . The method according to claim 1 , wherein the reference mark ( 110 ) is arranged in a vertical plane comprising the installation direction, this plane corresponding to a lifting plane of the axis (C) of the axle ( 12 ).
7 . The method according to claim 6 , comprising the mounting of a laser beam device ( 120 ) in the bore ( 14 ) of the bogie so that an axis of the laser beam is coaxial with the axis (B) of the bore ( 14 ) of the bogie.
8 . The method according to claim 7 , wherein step d) is preceded by a step comprising the mounting of a sleeve ( 150 ) around a first end ( 12 a ) of the axle ( 12 ), said first end being arranged facing the bore ( 14 ) of the bogie along the axle installation direction.
9 . The method according to claim 1 , comprising the mounting of a laser beam device ( 120 ) in the bore ( 14 ) of the bogie so that an axis of the laser beam is coaxial with the axis (B) of the bore ( 14 ) of the bogie.
10 . The method according to claim 9 , wherein step d) is preceded by a step comprising the mounting of a sleeve ( 150 ) around a first end ( 12 a ) of the axle ( 12 ), said first end being arranged facing the bore ( 14 ) of the bogie along the axle installation direction.
11 . The method according to claim 1 , wherein step d) is preceded by a step comprising the mounting of a sleeve ( 150 ) around a first end ( 12 a ) of the axle ( 12 ), said first end being arranged facing the bore ( 14 ) of the bogie along the axle installation direction.
12 . A system for implementing a method for mounting an axle ( 12 ) in a bore ( 14 ) of a bogie ( 16 ) mounted on a landing gear ( 18 ) of an aircraft, the landing gear ( 18 ) being in a gear-down position, the bore ( 14 ) extending in a substantially horizontal direction referred to as the axle installation direction, between a first open end ( 14 a ) and a second open end ( 14 b ), the system comprising:
a mobile bearing structure ( 30 ),
alignment means for aligning the axis (B) of the bore of the bogie with the axis (C) of the axle, the alignment means comprising a reference mark ( 110 ) carried by the mobile bearing structure ( 30 ),
means for moving the axle ( 12 ) into a position of insertion into the bore ( 14 ) of the bogie ( 16 ), and for mounting the axle ( 12 ) in the bore ( 14 ) of the bogie.
13 . The system according to claim 12 , further comprising a tank ( 90 ) filled with liquid nitrogen.
14 . The system according to claim 12 , wherein the alignment means further comprise a laser beam device ( 120 ) shaped for installation in the bore ( 14 ) of the bogie so that an axis of the laser beam is coaxial with the axis (B) of the bore ( 14 ) of the bogie.
15 . The system according to claim 12 , further comprising means for moving the reference mark comprising at least one rolling element ( 42 ) configured for moving the bearing structure ( 30 ) along a horizontal plane, and at least one raising element ( 44 ) for the bearing structure ( 30 ) configured for moving the bearing structure ( 30 ) in translation along a substantially vertical direction (Z).
16 . The system according to claim 12 , wherein the bearing structure ( 30 ) comprises an upper frame ( 40 ) carried by a plurality of vertical uprights ( 34 ), the upper frame ( 40 ) supporting the means for moving the axle into a position of insertion into the bore ( 14 ) of the bogie and for mounting the axle in the bore ( 14 ) of the bogie.
17 . The system according to claim 16 , wherein the means for moving the axle comprise a rail ( 50 ) carried by the upper frame and a hoist ( 56 ) mounted for translational movement on the rail ( 50 ) along the axle installation direction.
18 . The system according to claim 17 , wherein the reference mark ( 110 ) is fixedly mounted relative to the rail and arranged in a plane comprising the axle ( 12 ) installation direction and the direction of translational movement of the hoist ( 56 ) on the rail.