CN209410321U - Locking and unlock undercarriage door and the device of pillar folding and unfolding track - Google Patents
Locking and unlock undercarriage door and the device of pillar folding and unfolding track Download PDFInfo
- Publication number
- CN209410321U CN209410321U CN201822029827.1U CN201822029827U CN209410321U CN 209410321 U CN209410321 U CN 209410321U CN 201822029827 U CN201822029827 U CN 201822029827U CN 209410321 U CN209410321 U CN 209410321U
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- China
- Prior art keywords
- swing arm
- latch hook
- locking
- unlock
- pillar
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- Withdrawn - After Issue
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Abstract
A kind of locking disclosed by the utility model and unlock undercarriage door and the device of pillar folding and unfolding track, it is intended to propose that one kind can save the locking-unlocking device to take up space.The utility model is achieved through the following technical solutions: the swing arm latch hook for connecting firmly ears piece on stream pressure cylinder shaft end and its being movably articulated on auricle；Piston rod is in the case where the jet stream ozzle that stream pressure cylinder radially loading is matched is filled with Fluid pressure effect, it is rotated by pushing swing arm latch hook to stream the movable arm rotating shaft that pressure cylinder ears piece is connected with the hinged rocker shaft of piston rod, complete swing arm latch hook open, the switch motion for rotational angle of locking, the lock rings or unlock being mounted on undercarriage door or pillar on lock-bit, thus by locking or unlocking on undercarriage door or pillar in designated position.Lock mode can meet the folding and unfolding locking of the undercarriage door or pillar of different folding and unfolding tracks simultaneously, improve aircraft takeoffs and landings uplock interchangeability and reliability.And overcome the defect that prior art uplock installation site can not be adjusted arbitrarily.
Description
Technical field
The utility model is a kind of automatic locking, and using air pressure (or hydraulic) driving, the unlock of priming system emergency driving, real
The now locking to the undercarriage door and pillar of different folding and unfolding tracks and tripper.
Background technique
Undercarriage is one of the important device in aircaft configuration, and what it influenced aircraft takes off, lands and slide race process.It is main
Undercarriage (MLG) absorbs landing strength and supports most of aircraft weight when aircraft is on ground.Main landing gear will also land and rush
Load transmission is hit to aircaft configuration.Main landing gear is maintained at extended position by each main landing gear side brace.Side brace has up and down
Two parts.Down lock pillar was moved to center and main landing gear is locked in extended position.Every side hatch door mechanism includes:
1 hatch door pull rod and 1 crank-rocker.Pull rod one end is mounted on undercarriage leg diagonal brace section, passes through crank-rocker and pillar phase
Even；The other end is connect with hatch door, and using ball bearing, tie point is located in the middle part of hatch door at aircraft symmetrical plane.Aircraft is complete
At needing first to open undercarriage door during the folding and unfolding of undercarriage, to close hatch door in receipts after undercarriage, the opening of hatch door with
Closing can drive hatch door pressurized strut to complete by the hydraulic coupling of hydraulic system, can also be by undercarriage outer cylinder
Upper installation idler wheel is equipped with duckbilled follower on the motion profile of idler wheel, and idler wheel drives the mechanism to complete the opening of hatch door
And closing.Drop process when aircraft landing: the undercarriage control switch in cockpit is placed in " putting down " position by driver
It sets, aircraft is that must take in undercarriage in body in the sky.Aircraft takeoffs and landings folding and unfolding process can be divided into unlock, start to positioning and
It locks these stages.The normal folding and unfolding action process of Landing Gear System with hatch door is as follows, first before, MLG Door it is upper
Lock unlock, then before, MLG Door pressurized strut movement open hatch door.After hatch door is opened, undercarriage down lock pressurized strut is dynamic
Make, down lock is unlocked, later, preceding, main landing gear pressurized strut starts to act, and by undercarriage stowage and locks.Undercarriage stowage
Later, each undercarriage door is begun to shut off under the driving of hatch door pressurized strut, and is lockked eventually by hatch door uplock, so just
Complete undercarriage stowage process.Equally, it includes that hatch door is opened that undercarriage, which normally puts down process, gear down and is locked, cabin
Door is closed.Large aircraft landing gear folding and unfolding control system hydraulic framework of the typical case with hatch door is by undercarriage control valve, each undercarriage
Folding and unfolding actuator, uplock and down lock actuator, each landing gear compartment door switch actuator and uplock actuator composition.It comes from
The high-voltage oil liquid of hydraulic system initially enters undercarriage control control valve, which receives undercarriage control unit
Signal controls the switch motion of undercarriage control and hatch door by the selection of valve location.Control valve draws four tunnels, will be high
Pressure oil liquid is supplied to each actuator, for undercarriage control and the pressure supply of door-down switch process and the oil return of corresponding reverse process, each
Road flow is distributed according to the flow resistance characteristic of the load of actuator and pipeline, valve.Uplock is gear up in extreme position
Fixation device, the reliability of latch mechanism has very important influence to system function reliability, has to the safety of aircraft and lifts
The effect of sufficient weight.During undercarriage control, each hatch door is different from the folding and unfolding track of pillar, undercarriage leg and hatch door
In receipts in place after, it is also different to the loading direction of locking device.Different lockings usually is selected to the locking of hatch door and pillar
Device.Therefore currently, most of types using uplock to aircraft landing gear hatch door and pillar deformed in flight course into
Row control, but it is also different due to the folding and unfolding track of each hatch door and pillar and its to the loading direction of locking device, and big more options are not
The uplock of same type locks it, this to need to select different types of uplock, and it is a large amount of not only to occupy aircraft
Weight and installation space, have an effect on the integral layout of equipment.And the installation of most of situation, different types of uplock is empty
Between it is limited, installation site can not arbitrarily be adjusted according to Impact direction.To improve aircraft system reliability, landing-gear system is big
It needs to carry out Redundancy Design more.Traditional uplock normal release uses hydraulic-driven to adopt that is, when plane hydraulic system breaks down
It is met an urgent need and is unlocked with air pressure.
Utility model content
The purpose of this utility model is to propose one kind for the shortcoming of conventional locking mechanisms during undercarriage control
Structure is simple, can save occupy installation space, using air pressure or hydraulic-driven, undercarriage difference folding and unfolding track can be suitable for
The locking of each hatch door and pillar and tripper.
The technical scheme adopted by the utility model to solve the technical problem is as follows: it is a kind of locking and unlock undercarriage door and
The device of pillar folding and unfolding track, comprising: the one end for providing power is formed with the stream pressure cylinder of ears piece and does in the stream pressure cylinder reciprocal
The piston rod of hollow cavity and its jet stream ozzle of floating piston and radial communication stream pressure cylinder pressure chamber are moved and are formed with,
It is characterized in that: the swing arm latch hook for being fixedly connected with ears piece on the stream pressure cylinder shaft end and its being movably articulated on the auricle；Piston
Bar is in the case where the jet stream ozzle that stream pressure cylinder radially loading is matched is filled with Fluid pressure effect, by linking with the hinged rocker shaft of piston rod
Swing arm latch hook, streams the connected movable arm rotating shaft rotation of 1 ears piece of pressure cylinder, and the execution of swing arm latch hook opens, the switch for rotational angle of locking
Movement will be on undercarriage door or pillar the lock rings or unlock being mounted on undercarriage door or pillar on lock-bit
It locks or unlocks in designated position.
The utility model has the following beneficial effects: compared with the prior art
During undercarriage control, each hatch door is different from the folding and unfolding track of pillar, and undercarriage leg and hatch door are received in place
Afterwards, also different to the loading direction of locking device.Different locking devices traditionally is selected to the locking of hatch door and pillar.Root
The locking principle of device accordingly can be according to the lock ring being installed on hatch door or pillar when the installation site of locking device is adjustable
Product installation site is adjusted to the loading direction of locking device, that is, is suitable for different folding and unfolding tracks；Locking device installation site is not
When adjustable, need to only be equipped with different latch hooks can meet different folding and unfolding tracks each hatch door of undercarriage and pillar locking and
Unlock.
The utility model, which uses, to be fixedly connected with ears piece on stream 1 shaft end of pressure cylinder and its is movably articulated in the swing arm of the ears on piece
Latch hook 8；Piston rod 3 is in the case where the jet stream ozzle 12 that stream 1 radially loading of pressure cylinder is matched is filled with Fluid pressure effect, by hinged with piston rod
Rocker shaft 6 push swing arm latch hook 8 to rotate around with the movable arm rotating shaft 7 that is connected of stream 1 ears piece of pressure cylinder, completion swing arm latch hook 8 opens,
The switch motion of locking rotational angle.Lock mode can meet the folding and unfolding of the undercarriage door or pillar of different folding and unfolding tracks simultaneously
Uplock installation space is saved in locking, can be reduced landing gear of aircraft complication, be improved landing gear of aircraft uplock interchangeability
And reliability.And it is limited to overcome prior art uplock installation space, and installation site can not arbitrarily be adjusted according to Impact direction
Whole defect.
The utility model is automatic locking, and using (hydraulic) driving of air pressure, the unlock of priming system emergency driving.The utility model
The holder locking apparatus that rises and falls suitable for different folding and unfolding tracks
Detailed description of the invention
Fig. 1 is the device locked state signal that the utility model locked and unlocked undercarriage door and pillar folding and unfolding track
Figure；
Fig. 2 is the normal release schematic diagram of Fig. 1；
Fig. 3 is the emergency unlock schematic diagram of Fig. 1；
In figure: 1 stream pressure cylinder, 2 end caps, 3 piston rods, 4 reset springs, 5 floating pistons, 6 rocker shafts, 7 movable arm rotating shafts, 8
Swing arm latch hook, 9 lock rings, 10 promotional implement mandrils, 11 priming system promotional implements, 12 jet stream ozzles, 13 lock ring motion profiles.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Specific embodiment
Refering to fig. 1, in the embodiment described below, a kind of locking and unlock undercarriage door and pillar folding and unfolding track
Device, comprising: during the one end for providing power is formed with the stream pressure cylinder 1 of ears piece and moves reciprocatingly and be formed in the stream pressure cylinder 1
The piston rod 3 and its floating piston 5 of cavity body and the jet stream ozzle 12 of 1 pressure chamber of radial communication stream pressure cylinder.It is pressed in the stream
The swing arm latch hook 8 for being fixedly connected with ears piece on 1 shaft end of cylinder and its being movably articulated on the auricle；Piston rod 3 is in stream 1 radially loading of pressure cylinder
The jet stream ozzle 12 matched is filled under Fluid pressure effect, is linked swing arm latch hook 8 by the rocker shaft 6 hinged with piston rod, around
It flows the connected movable arm rotating shaft 7 of 1 ears piece of pressure cylinder to rotate, the execution of swing arm latch hook 8 opens, the switch motion for rotational angle of lock, pacifying
Lock ring 9 on undercarriage door or pillar locks or unlocks on lock-bit, will lock or solves on undercarriage door or pillar
Lock is in designated position.
In the embodiment described below, stream pressure cylinder 1 forms pressure by the end cap 2 and stream 1 step cavity of pressure cylinder of tail end
Cavity is assemblied in piston rod 3 for linear motion in pressure cavity by pressure cavity front end step necking down chamber and is equipped with reset
Spring 4, stream 1 shaft end of pressure cylinder are formed with ears piece.Piston rod 3 connects swing arm by stretching out the rocker shaft 6 that stream 1 shaft end of pressure cylinder connects firmly
Latch hook 8, swing arm latch hook 8 are connected to the ears on piece of stream pressure cylinder 1 by movable arm rotating shaft 7, and swing arm latch hook 8 may be around movable arm rotating shaft 7
Rotation.Pressure cavity is connected to jet pipe mouth 12, from hydraulic or Pneumatically driven system high-pressure fluid, initially enters undercarriage receipts
Control valve is put, the signal of undercarriage control unit is received, jet stream ozzle 12 is entered by the selection of valve location, according to rising and falling
The control law that frame control unit determines applies control force to the piston rod 3 of control object, and piston rod 3 is in reset spring 4 and high pressure
It moves reciprocatingly under fluid matasomatism, controls locking and the unlocking motion of undercarriage control and hatch door.Aircraft door is pushed when locking
Or pillar, so that the lock ring 9 installed on hatch door or pillar is collided 8 lower wedge surface of swing arm latch hook along lock ring motion profile 13, thus to dynamic
Arm latch hook 8 generates a torque counterclockwise, which overcomes the structure of the generations such as 4 power of reset spring and sealing in lock pressurized strut
Frictional force drives piston rod 3 protruding, and when 8 rotational angle of swing arm latch hook is α, lock ring 9 crosses 8 cusp of swing arm latch hook, living
Stopper rod 3 retracts under the action of reset spring 4, and after lock ring 9 enters circle ring area, swing arm latch hook 8 returns to locked position, completes
Locking.After locking, lock ring 9 and 8 lower jaw face contact of swing arm latch hook, tangential direction of the direction load F along lock ring motion profile 13.By
In 8 maxilla surface of swing arm latch hook and movable arm rotating shaft 7 be isocentric circular arc cylinder, because lock ring 9 is to the loading direction of swing arm latch hook 8 mistake always
7 central point of movable arm rotating shaft, for the normal direction of loading direction without component, load does not generate torque to swing arm latch hook 8, therefore can keep
Locked state.
Refering to Fig. 2.When normal release, air pressure or it is hydraulic lock uplock cavity is entered by jet stream ozzle 12, float in cavity
Piston 5 compresses under air pressure or hydraulic action with end cap 2, remain stationary, piston rod 3 overcomes spring under air pressure or hydraulic drive
After the resistances such as power, structural friction force, need to apply one to swing arm latch hookAnticlockwise moment, because lock ring 9 is to swing arm
The loading direction of latch hook 8 crosses the bolt-center point of movable arm rotating shaft 7 always, therefore swing arm latch hook and lock ring frictional force need to only be overcome to produce
Raw clockwise moment, push swing arm latch hook 8 to rotate counterclockwise, when swing arm latch hook, which rotates more than α, spends, in hatch door or
The effect of pillar retractable actuating cylinder is lower to complete unlock.
Refering to Fig. 3.Emergency unlock: it in an alternate embodiment of the invention, is unlocked when normal release, is answered using air pressure or hydraulic-driven
Quick-acting prescription formula is driven using priming system.Priming system is equipped with gunpowder or explosive, is acted on lower generate by electric spark and burns or explode, to draw
Combustion gunpowder, ignition charge or do mechanical work disposable component and device general name.Floating piston 5 will flow pressure cylinder 1
Pressure cavity be divided into normal release chamber and emergency unlock chamber；Emergency unlock chamber floats between floating piston 5 and end cap 2
Piston 5 can be in the cylindrical cavity that 2 cylinder step of end cap separates, by the tail portion stepped cylindrical chamber of 2 cylinder step of end cap separation
In body, it is equipped with the priming system promotional implement 11 with promotional implement mandril 10, promotional implement mandril 10 passes through the centre bore of end cap 2, send
Enter in 5 tail hole of floating piston, when aircraft air pressure or hydraulic system failure, ignites priming system promotional implement 11, priming system
Promotional implement mandril 10 pushes floating piston 5 for linear motion under the action of gunpowder explosion thrust, and floating piston 5 pushes piston rod
3, and then the rotation of swing arm latch hook is pushed to complete unlock.
It is to be provided to the engineers and technicians for being familiar with the utility model field to the utility model and its embodiment party above
The description of case, these descriptions should be considered to be illustrative and not restrictive.Engineers and technicians utility model can weigh accordingly
Thought in sharp claim is done specific operation and is implemented, in the spirit for not departing from the utility model that appended claims define and
Under the premise of range, it can be made a variety of changes in the form and details.Above-mentioned these are regarded as the utility model
Coverage.
Claims (10)
1. a kind of locking and unlock undercarriage door and the device of pillar folding and unfolding track, comprising: provide power one end be formed with it is double
The stream pressure cylinder (1) of auricle and piston rod (3) and its floating work that hollow cavity is moved reciprocatingly and be formed in the stream pressure cylinder (1)
Fill in the jet stream ozzle (12) of (5) and radial communication stream pressure cylinder (1) pressure chamber, it is characterised in that: in stream pressure cylinder (1) axis
The swing arm latch hook (8) for being fixedly connected with ears piece on end and its being movably articulated on the auricle；Piston rod (3) is radial in stream pressure cylinder (1)
The jet stream ozzle (12) of assembly is filled under Fluid pressure effect, passes through rocker shaft (6) the linkage swing arm lock hinged with piston rod
Hook (8), streams connected movable arm rotating shaft (7) rotation of pressure cylinder (1) ears piece, and swing arm latch hook (8) execution opens, rotational angle of locking
Switch motion locks or unlocks the lock ring (9) being mounted on undercarriage door or pillar on lock-bit, by undercarriage door or
It locks or unlocks on pillar in designated position.
2. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: stream
Pressure cylinder (1) forms pressure cavity by the end cap (2) and stream pressure cylinder (1) step cavity of tail end, and it is straight to be assemblied in work in pressure cavity
The piston rod (3) of line movement is equipped with reset spring (4) by pressure cavity front end step necking down chamber, flows pressure cylinder (1) shaft end system
There is ears piece.
3. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: living
Rocker shaft (6) connection swing arm latch hook (8) that stopper rod (3) is connected firmly by stretching out stream pressure cylinder (1) shaft end, swing arm latch hook (8) pass through
Movable arm rotating shaft (7) is connected to the ears on piece of stream pressure cylinder (1), and swing arm latch hook (8) is rotated around movable arm rotating shaft (7).
4. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: pressure
Power cavity is connected to jet pipe mouth (12) and initially enters undercarriage control control from hydraulic or Pneumatically driven system high-pressure fluid
Valve processed receives the signal of undercarriage control unit, enters jet stream ozzle (12) by the selection of valve location, according to undercarriage
The control law that control unit determines applies control force to the piston rod (3) of control object, piston rod (3) in reset spring (4) and
It moves reciprocatingly under high-pressure fluid effect, controls locking and the unlocking motion of undercarriage control and hatch door.
5. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: on
Aircraft door or pillar are pushed when lock, and the lock ring (9) installed on hatch door or pillar is made to collide swing arm along lock ring motion profile (13)
Latch hook (8) lower wedge surface, to generate a torque counterclockwise to swing arm latch hook (8), which overcomes the reset in lock pressurized strut
The structural friction force of the generations such as spring (4) power and sealing drives piston rod (3) protruding, when swing arm latch hook (8) rotational angle
When for α, lock ring (9) crosses swing arm latch hook (8) cusp, and piston rod (3) retracts under the action of reset spring (4), in lock ring (9)
Into after circle ring area, swing arm latch hook (8) returns to locked position, completes locking.
6. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: on
After lock, lock ring (9) and swing arm latch hook (8) lower jaw face contact, the direction load F are moved along the tangential direction of lock ring motion profile (13)
Arm latch hook (8) maxilla surface and movable arm rotating shaft (7) are isocentric circular arc cylinder, lock ring (9) to the loading direction of swing arm latch hook (8) always
Movable arm rotating shaft (7) central point is crossed, for the normal direction of loading direction without component, load does not generate torque to swing arm latch hook (8), keeps
Locked state.
7. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: just
Often when unlock, air pressure or it is hydraulic enter lock uplock cavity by jet stream ozzle (12), floating piston (5) is in air pressure or liquid in cavity
Pressure effect is lower and end cap (2) compresses, and remain stationary, piston rod (3) overcomes spring force, structural friction under air pressure or hydraulic drive
After mechanical resistance power, one is applied to swing arm latch hookAnticlockwise moment, loading direction of the lock ring (9) to swing arm latch hook (8)
Always the bolt-center point for passing through movable arm rotating shaft (7), the clockwise moment for overcoming swing arm latch hook and lock ring frictional force to generate
, push swing arm latch hook (8) to rotate counterclockwise, when swing arm latch hook, which rotates more than α, spends, acted in hatch door or pillar retractable actuating cylinder
Lower completion unlock.
8. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: just
It is unlocked when often unlock using air pressure or hydraulic-driven, emergency mode is using priming system driving emergency unlock.
9. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that: floating
The pressure cavity for flowing pressure cylinder (1) is divided into normal release chamber and emergency unlock chamber by piston (5)；Emergency unlock chamber, which is located at, to float
Between piston (5) and end cap (2), floating piston (5) can be in the cylindrical cavity that end cap (2) cylinder step separates, by end cap (2)
In the tail portion stepped cylindrical cavity that cylinder step separates.
10. locking as described in claim 1 and unlock undercarriage door and the device of pillar folding and unfolding track, it is characterised in that:
It is equipped with the priming system promotional implement (11) with promotional implement mandril (10), promotional implement mandril (10) passes through the centre bore of end cap (2),
It is sent into floating piston (5) tail hole, when aircraft air pressure or hydraulic system failure, ignites priming system promotional implement (11),
Priming system promotional implement mandril (10) pushes floating piston (5) for linear motion under the action of gunpowder explosion thrust, floating piston
(5) piston rod (3) are pushed, and then the rotation of swing arm latch hook is pushed to complete unlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822029827.1U CN209410321U (en) | 2018-12-04 | 2018-12-04 | Locking and unlock undercarriage door and the device of pillar folding and unfolding track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822029827.1U CN209410321U (en) | 2018-12-04 | 2018-12-04 | Locking and unlock undercarriage door and the device of pillar folding and unfolding track |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209410321U true CN209410321U (en) | 2019-09-20 |
Family
ID=67936550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822029827.1U Withdrawn - After Issue CN209410321U (en) | 2018-12-04 | 2018-12-04 | Locking and unlock undercarriage door and the device of pillar folding and unfolding track |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209410321U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112478131A (en) * | 2020-12-08 | 2021-03-12 | 中航飞机起落架有限责任公司 | Mechanical lock mechanism of integrated linkage coordination valve |
| CN112623198A (en) * | 2020-12-29 | 2021-04-09 | 中国航空工业集团公司西安飞机设计研究所 | Lifting type undercarriage lower lock |
| CN113815838A (en) * | 2021-10-25 | 2021-12-21 | 中航通飞华南飞机工业有限公司 | Cabin door locking device of water plane |
| CN113859545A (en) * | 2021-10-18 | 2021-12-31 | 中航通飞华南飞机工业有限公司 | Fire-extinguishing type airplane water-feeding cabin door |
| CN113879538A (en) * | 2021-10-13 | 2022-01-04 | 北京机电工程研究所 | Bury formula folding lug mechanism and aircraft |
| CN115111235A (en) * | 2022-06-27 | 2022-09-27 | 北京航天发射技术研究所 | Manual and pneumatic dual-purpose connector locking and dropping mechanism |
-
2018
- 2018-12-04 CN CN201822029827.1U patent/CN209410321U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112478131A (en) * | 2020-12-08 | 2021-03-12 | 中航飞机起落架有限责任公司 | Mechanical lock mechanism of integrated linkage coordination valve |
| CN112623198A (en) * | 2020-12-29 | 2021-04-09 | 中国航空工业集团公司西安飞机设计研究所 | Lifting type undercarriage lower lock |
| CN112623198B (en) * | 2020-12-29 | 2023-03-24 | 中国航空工业集团公司西安飞机设计研究所 | Lifting type undercarriage lower lock |
| CN113879538A (en) * | 2021-10-13 | 2022-01-04 | 北京机电工程研究所 | Bury formula folding lug mechanism and aircraft |
| CN113879538B (en) * | 2021-10-13 | 2023-07-14 | 北京机电工程研究所 | Buried folding lifting lug mechanism and aircraft |
| CN113859545A (en) * | 2021-10-18 | 2021-12-31 | 中航通飞华南飞机工业有限公司 | Fire-extinguishing type airplane water-feeding cabin door |
| CN113815838A (en) * | 2021-10-25 | 2021-12-21 | 中航通飞华南飞机工业有限公司 | Cabin door locking device of water plane |
| CN115111235A (en) * | 2022-06-27 | 2022-09-27 | 北京航天发射技术研究所 | Manual and pneumatic dual-purpose connector locking and dropping mechanism |
| CN115111235B (en) * | 2022-06-27 | 2024-03-05 | 北京航天发射技术研究所 | Manual and pneumatic connector locking and falling mechanism |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190920 Effective date of abandoning: 20220112 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190920 Effective date of abandoning: 20220112 |