CN108248816A - Airstair with gear fitted economic unlocking structure - Google Patents
Airstair with gear fitted economic unlocking structure Download PDFInfo
- Publication number
- CN108248816A CN108248816A CN201810141045.9A CN201810141045A CN108248816A CN 108248816 A CN108248816 A CN 108248816A CN 201810141045 A CN201810141045 A CN 201810141045A CN 108248816 A CN108248816 A CN 108248816A
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- CN
- China
- Prior art keywords
- frame
- unlocking structure
- economic
- airstair
- fixed part
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/24—Steps mounted on, and retractable within, fuselages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a kind of airstairs with gear fitted economic unlocking structure, including fixed part and folding part, drive component are provided on fixed part, drive component includes the ball-screw and driver that are electrically connected.Folding part includes folded frame, translational frame, connection tablet, first connecting rod system, pedal and hush panel.Airstair further includes manual unlocking structure, and manual unlocking structure includes rack, gear, control piece, handle, gag lever post.Control piece moves with fixed part to engage and detach, and hush panel is made to be fixed on fixed part and detach from fixed part by rack drives gag lever post.In this case, if the airstair with gear fitted economic unlocking structure powers off when expansion is needed, it can be with artificial operating handle, swing handle, band moving gear rotates, and then is moved with carry-over bar, changes the position of gag lever post, so as to fulfill folding part is opened, ensure the airstair normal use with gear fitted economic unlocking structure.
Description
Technical field
The present invention relates to helicopter airstair field more particularly to a kind of stepping on gear fitted economic unlocking structure
Machine ladder.
Background technology
In the related art, Airstairs of airplane is ground airstair, can not realize folding, and the random difficulty that carries is larger, increases
The demand of aircraft mating airstair to airport is added.Although some airstairs can realize the function of folding, in power blackout situation,
Can not emergency opening sealing pedal, affect the normal use of airstair.
Invention content
A kind of airstair with gear fitted economic unlocking structure that embodiment of the present invention provides, including fixed part
And folding part, the folding part are movably collected in the fixed part, and drive component is provided on the fixed part, it is described
Drive component includes the ball-screw and driver that are electrically connected,
The folding part includes folded frame, translational frame, connection tablet, first connecting rod system, pedal and hush panel, institute
It states connection tablet and connects the translational frame, the translational frame connects the folded frame, and the pedal is rotatably arranged on institute
It states on folded frame, the first connecting rod system connects the folded frame and the translational frame,
The driver drives the ball screw turns to drive axis of the translational frame along the ball-screw
Direction moves through the first connecting rod system and the folded frame is driven to open and shrink,
The airstair with gear fitted economic unlocking structure further includes manual unlocking structure, the manual unlocking
For structure setting in the hush panel, the manual unlocking structure includes rack, gear, control piece, handle, gag lever post, described
Rack connects the control piece and the gag lever post, and the rack and gear engagement, the handle connect the gear,
The control piece moves with the fixed part to engage and detach, and make by gag lever post described in the rack drives
The hush panel is fixed on the fixed part and is detached from the fixed part.
In embodiment of the present invention, have gear fitted economic unlocking structure airstair need expansion when such as
Resolute electricity, can be with artificial operating handle, swing handle, and band moving gear rotates, and then is moved with carry-over bar, changes the position of gag lever post
It puts, so as to fulfill folding part is opened, ensures the airstair normal use with gear fitted economic unlocking structure.
In some embodiments, the control piece is connected with movable part, and the movable part connects the rack, the control
Product controls the rack to move by the movable part.
In some embodiments, Tooth rack limit device is additionally provided in the hush panel, it is fixed to be provided on the rack
Position bar, when the direction of the rack to the separate control piece moves to extreme position, the locating rod contacts the rack limit
Position device is to prevent the rack from continuing to move.
In some embodiments, multiple limit tracks being located along the same line are provided in the hush panel, it is described
Limit track is located in annular shape, the gag lever post in the limit track.
In some embodiments, the fixed part includes bottom frame, side frame and fixed frame, the bottom frame, the side frame
Fixed part port has been cooperatively formed with the fixed frame, the first track has been provided on the side frame, the folding part is described
It is slided on first track and passes through the fixed part port and pass in and out the fixed part, the folding part is accommodated into the fixed part
Afterwards, the hush panel closes the fixed part port.
In some embodiments, the side frame includes first segment and second segment, and the first segment is in the vertical direction
Length is more than the length of the second segment in the vertical direction,
The second track is offered on the first segment,
The airstair with gear fitted economic unlocking structure further includes third connecting rod, the third connecting rod connection
First track and the hush panel,
The translational frame is slidably arranged on second track.
In some embodiments, first track includes the horizontal component being located on the translational frame and positioned at institute
The sloping portion on folded frame is stated, the folded frame is provided with pulley, and the pulley is slidably arranged in first track
On.
In some embodiments, the first connecting rod system includes the first bar and the second bar,
First bar and second bar are arranged on the folded frame, first bar and corresponding described second
Bar is hinged, and first bar connects the corresponding translational frame respectively.
In some embodiments, the ball-screw is provided with positioning region on one end of the folding part, described
Positioning region is formed with limit protrusion,
Safety structure is provided on the folded frame, the safety structure includes operation portion, connector and fixing piece, institute
It states fixing piece to be arranged on the connection tablet, the fixing piece is formed with limiting groove, and the connector connects the operation
Portion and the fixing piece, the operation portion control the connector that the fixing piece is driven to move in the vertical direction.
In some embodiments, the operation portion includes locating part and shaft, and the locating part is connected by the shaft
The connector is connect, arc track is offered on the folded frame, multiple locating slots are offered on the arc track, it is described
Locating part drives the connector to rotate to drive the fixing piece raising and lowering around the shaft.
The additional aspect and advantage of embodiment of the present invention will be set forth in part in the description, partly will be from following
Become apparent in description or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the accompanying drawings below to embodiment by change
It obtains significantly and is readily appreciated that, wherein：
Fig. 1 is the stereochemical structure signal of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Figure；
Fig. 2 is another stereochemical structure of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Schematic diagram；
Fig. 3 is the another stereochemical structure of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Schematic diagram；
Fig. 4 is the sectional perspective structure of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Schematic diagram；
Fig. 5 is another sectional perspective of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Structure diagram；
Fig. 6 is the solid of the fixing piece of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Structure diagram；
Fig. 7 is the vertical of the safety structure of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Body structure diagram；
Fig. 8 is the office of the safety structure of the airstair with gear fitted economic unlocking structure of embodiment of the present invention
Amplify dimensional structure diagram in portion.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as needle ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
The description present invention and simplified description rather than instruction imply that signified device or element must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.
" first " is defined as a result, and the feature of " second " can be expressed or implicitly includes one or more feature.
In description of the invention, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or electrical connection or can mutually communicate；It can be directly connected, it can also be by between intermediary
It connects connected, can be the interaction relationship of connection inside two elements or two elements.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the description of the present invention unless specifically defined or limited otherwise, fisrt feature second feature it " on " or
It " under " can be in direct contact including the first and second features, can also include the first and second features not be in direct contact but
Pass through the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include
Fisrt feature is right over second feature and oblique upper or is merely representative of fisrt feature level height higher than second feature.First
Feature second feature " under ", " lower section " and " below " including fisrt feature immediately below second feature and obliquely downward or only
Only represent that fisrt feature level height is less than second feature.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Please refer to Fig.1-Fig. 8, a kind of stepping on gear fitted economic unlocking structure that embodiment of the present invention provides
Machine ladder 100, including fixed part 10 and folding part 20, folding part 20 is movably collected in fixed part 10.It is set on fixed part 10
Drive component 12 is equipped with, drive component 12 includes the ball-screw 122 being electrically connected and driver 124.Folding part 20 includes folding
Folded frame 22, translational frame 24, connection tablet 26, first connecting rod system 28 and pedal 21, connection tablet 26 connect translational frame
24, translational frame 24 connects folded frame 22, and pedal 21 is rotatably arranged on folded frame 22, the connection folding of first connecting rod system 28
Folded frame 22 and translational frame 24.Driver 124 drives ball-screw 122 to rotate to drive translational frame 24 along ball-screw
122 axis direction moves through 28 Foldable frame 22 of first connecting rod system and opens and shrink.
In this way, drive component 12 drives ball-screw 122 to rotate, it is arranged on ball-screw and matches with ball-screw screw thread
The translational frame of conjunction moves therewith along the axis direction of ball-screw, so pull folded frame, realization pack up folded frame or
Person puts down folded frame.
In some embodiments, folding part 20 further includes hush panel 23, and hush panel 23 is connected solid by second connecting rod 25
Determine portion 10, hush panel 23 is located at 22 lower section of folded frame.Folding part 20 is accommodated into after folding in fixed part 10, and hush panel 23 rotates
And fixed part 10 is coordinated to be subjected to displacement in fixed part 10 to limit folding part 20.
In embodiment of the present invention, airstair drives ball screw turns to subtract significantly with folded portion by driver
Airstair the space occupied is lacked, has easily facilitated airstair and carry at random.Meanwhile hush panel and fixed part link together,
And be arranged below folded frame, avoid airstair in the open state, hush panel influences airstair normal use.This
Outside, hush panel is made to reduce abrasion and contaminated probability far from ground, ensure that the usage experience of airstair.
In some embodiments, fixed part 10 includes bottom frame 14, side frame 16 and fixed frame 18, bottom frame 14, side frame 16
Fixed part port has been cooperatively formed with fixed frame 18, the first track 162 has been provided on side frame 16, folding part 20 is in the first track
It is slided on 162 and passes through fixed part port disengaging fixed part 10, after the receiving of folding part 20 is arrived in fixed part 10, hush panel 23 is closed
Fixed part port.
In this way, when airstair is in unused state, folding part is housed in fixed part, hush panel closing fixed part end
Mouthful, folding part is avoided to be subjected to displacement in fixed part, so as to improve the structural stability of airstair in a folded configuration, also more
Add and carry and carry convenient for airstair.
In some embodiments, side frame 16 is vertically arranged in the both sides of bottom frame 14, and bottom frame 14 is in hollow setting, ball wire
Thick stick 122 is arranged on the hollow part of bottom frame 14.
In this way, hollow base frame construction has not only reached the purpose of material-saving, reduce the material needed for manufacture airstair, also
Ball screw turns are easily facilitated, avoids ball-screw in rotation process and bottom frame is in contact, influence ball screw turns
It is smooth in addition ball-screw is caused to wear, influence the service life that ball-screw uses.
In some embodiments, side frame 16 includes first segment 164 and second segment 166, and first segment 164 is in the vertical direction
Length be more than the length of second segment 166 in the vertical direction.The second track 168 is offered on first segment 164.Match with gear
The airstair 100 of box-like economic unlocking structure further includes third connecting rod 27, and third connecting rod 27 connects the first track 162 and hush panel
23.Translational frame 24 is slidably arranged on the second track 168.
In this way, when translational frame Foldable frame moves, the second track and pulley reduce translational frame movement institute
The frictional force of generation improves the fluency of translational frame movement, also improves the efficiency of folding part folding and unfolding.
In some embodiments, the second track 168 includes horizontally disposed planar portions 161, and 27 one end of third connecting rod is set
It is equipped with pulley, pulley is slidably connected planar portions 161.
In some embodiments, the first track 162 includes the horizontal component being located on translational frame 24 and positioned at folding
Sloping portion on frame 22, folded frame 22 are provided with pulley, and pulley is slidably arranged on the first track 162.
In some embodiments, circular hole is offered on side frame 16.
In this way, hollow side-frame structure has not only reached the purpose of material-saving, reduce the material needed for manufacture airstair, also
It easily facilitates operating personnel and observes structure inside airstair, find mechanical breakdown in time, improve the efficiency of airstair maintenance,
And then extend the service life of airstair.
In some embodiments, first connecting rod system 28 includes the first bar and the second bar 284.First bar and the second bar
284 are arranged on folded frame 22, and the first bar and corresponding second bar 284 are hinged, and the first bar connects corresponding shiftable frame respectively
Frame 24.
In embodiment of the present invention, by first connecting rod system, there is the airstair of gear fitted economic unlocking structure
It can realize Automatic-expanding folding part and pack up folding part, reduce the intensity of hand labor, improve the service efficiency of airstair.
In some embodiments, the first bar and corresponding translational frame 24 are hinged.
In some embodiments, the first bar and corresponding folded frame 22 are hinged.
It opens and folds in this way, articulated structure easily facilitates first connecting rod system so that present embodiment has gear
The airstair of the economic unlocking structure of formula is easily achieved.
In some embodiments, ball-screw 122 is provided with positioning region 1222 on one end of folding part 20, positioning
Portion 1222 is formed with limit protrusion 1224.Safety structure 222 is provided on folded frame 22, safety structure 222 includes operation portion
224th, connector 226 and fixing piece 228, fixing piece 228 are arranged on connection tablet 26, and fixing piece 228 is formed with limiting groove
2282,226 attended operation portion 224 of connector and fixing piece 228, operation portion 224 control connector 226 that fixing piece 228 is driven to exist
It is moved on vertical direction.
In embodiment of the present invention, after folding part moves to designated position, operation portion manual control fixing piece can be passed through
It falls, limit protrusion and limiting groove is made to coordinate to limit folding part movement；Or pass through operation portion manual control fixing piece liter
It rises, detaches limit protrusion and limiting groove, moved convenient for folding part.In this way, it greatly strengthens with gear fitted economic solution
The stability of the airstair of lock construction.
In some embodiments, the top of limit protrusion 1224 is arc-shaped, and the bottom portion of groove of limiting groove 2282 is in
It is corresponding arc-shaped.
In this way, the arc-shaped abrasion for reducing limit protrusion and when limiting groove is in contact generates, extends fixing piece
With the service life of positioning region, the maintenance cost of the airstair in present embodiment is reduced.
Specifically, the limit protrusion in present embodiment is to close to the direction of fixing piece protrusion, and limiting groove is to far from fixed
The direction recess in position portion.Meanwhile after coordinating between limiting groove and limit protrusion so that folding part and ball-screw, that is,
It can not be subjected to displacement between fixed part.
In some embodiments, operation portion 224 includes locating part 2242 and shaft 2244, and locating part 2242 passes through shaft
2244 connect connectors 226, offer arc track 221 on folded frame 22, multiple locating slots are offered on arc track 221
2212, locating part 2,242 2244 rotates to drive 228 raising and lowering of fixing piece around the shaft with follower link 226.
In this way, the operable operation portion 224 of operating personnel, rotates around the axis, fixing piece is risen or declined, so that folding
It is folded to occur opposing stationary or opposing stationary between portion and ball-screw, and operation portion and corresponding locating slot are fixed, with fixation
Operation portion.
In some embodiments, manual unlocking structure 232 is further included, manual unlocking structure 232 is arranged on hush panel 23
On.Manual unlocking structure 232 includes rack 2322, gear 2324, control piece 2326, handle 2328, gag lever post 2321, rack
2322 connection control pieces 2326 and gag lever post 2321, rack 2322 and gear 2324 engage, 2328 connection gear 2324 of handle.Control
Product 2326 drives gag lever post 2321 to move to engage and detach with fixed part 10, and fix hush panel 23 by rack 2322
It is detached on fixed part 10 and from fixed part 10.
In embodiment of the present invention, have gear fitted economic unlocking structure airstair need expansion when such as
Resolute electricity, can be with artificial operating handle, swing handle, and band moving gear rotates, and then is moved with carry-over bar, changes the position of gag lever post
It puts, so as to fulfill folding part is opened, ensures the airstair normal use with gear fitted economic unlocking structure.
In some embodiments, control piece 2326 is connected with movable part, movable part connection rack 2322, control piece 2326
Rack 2322 is controlled to move by movable part.
In this way, control piece is powered, driving movable part movement, and moved by movable part band carry-over bar.
Specifically, in present embodiment, control piece is electromagnetic relay.
In some embodiments, Tooth rack limit device 234 is additionally provided in hush panel 23, it is fixed to be provided on rack 2322
Position bar 2323, when the direction of rack 2322 to separate control piece 2326 moves to extreme position, locating rod 2323 contacts rack limit
Position device 234 is to prevent rack 2322 from continuing to move.
In some embodiments, multiple limit tracks 236 being located along the same line are provided in hush panel 23, are limited
Track 236 is located in annular shape, gag lever post 2321 in limit track 236.
In this way, gag lever post can move in limit track, connected, will sealed with the structure with different location on fixed part
Plate and fixed part are fixed up or detach hush panel and fixed part.
In the description of this specification, reference term " embodiment ", " is schematically implemented " certain embodiments "
The description of mode ", " example ", " specific example " or " some examples " etc. means with reference to the embodiment or example description
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the present invention.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can in an appropriate manner combine in any one or more embodiments or example.
While embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that：
In the case of not departing from the principle of the present invention and objective can these embodiments be carried out with a variety of variations, modification, replace and become
Type, the scope of the present invention are limited by claim and its equivalent.
Claims (10)
1. a kind of airstair with gear fitted economic unlocking structure, which is characterized in that including fixed part and folding part, institute
It states folding part to be movably collected in the fixed part, drive component, the driving component packet is provided on the fixed part
The ball-screw and driver of electric connection are included,
The folding part includes folded frame, translational frame, connection tablet, first connecting rod system, pedal and hush panel, the company
It connects tablet and connects the translational frame, the translational frame connects the folded frame, and the pedal is rotatably arranged on the folding
On folded frame, the first connecting rod system connects the folded frame and the translational frame,
The driver drives the ball screw turns to drive axis direction of the translational frame along the ball-screw
Moving through the first connecting rod system drives the folded frame to open and shrink,
The airstair with gear fitted economic unlocking structure further includes manual unlocking structure, the manual unlocking structure
It is arranged in the hush panel, the manual unlocking structure includes rack, gear, control piece, handle, gag lever post, the rack
The control piece and the gag lever post are connected, the rack and gear engagement, the handle connect the gear,
The control piece is moved by gag lever post described in the rack drives to engage with the fixed part and detach, and is made described
Hush panel is fixed on the fixed part and is detached from the fixed part.
2. the airstair according to claim 1 with gear fitted economic unlocking structure, which is characterized in that the control
Product is connected with movable part, and the movable part connects the rack, and the control piece controls the rack by the movable part
Movement.
3. the airstair according to claim 1 with gear fitted economic unlocking structure, which is characterized in that the envelope
Tooth rack limit device is additionally provided on oralia, is provided with locating rod on the rack, the rack is to far from the control piece
When direction moves to extreme position, the locating rod contacts the Tooth rack limit device so that the rack to be prevented to continue to move.
4. the airstair according to claim 1 with gear fitted economic unlocking structure, which is characterized in that the envelope
Multiple limit tracks being located along the same line are provided on oralia, the limit track is located in annular shape, the gag lever post
In the limit track.
5. the airstair according to claim 1 with gear fitted economic unlocking structure, which is characterized in that described solid
Determine portion and include bottom frame, side frame and fixed frame, the bottom frame, the side frame and the fixed frame have cooperatively formed fixed part end
Mouthful, the first track is provided on the side frame, the folding part is slided on first track and passes through the fixed part end
Mouth passes in and out the fixed part, and after the folding part is accommodated into the fixed part, the hush panel closes the fixed part port.
6. the airstair according to claim 5 with gear fitted economic unlocking structure, which is characterized in that the side
Frame includes first segment and second segment, and the length of the first segment in the vertical direction is more than the second segment in the vertical direction
Length,
The second track is offered on the first segment,
The airstair with gear fitted economic unlocking structure further includes third connecting rod, described in the third connecting rod connection
First track and the hush panel,
The translational frame is slidably arranged on second track.
7. the airstair according to claim 6 with gear fitted economic unlocking structure, which is characterized in that described
One track includes the horizontal component being located on the translational frame and the sloping portion on the folded frame, the folding
Frame is provided with pulley, and the pulley is slidably arranged on first track.
8. the airstair according to claim 1 with gear fitted economic unlocking structure, which is characterized in that described
One push and pull system includes the first bar and the second bar,
First bar and second bar are arranged on the folded frame, first bar and the corresponding second bar hinge
It connects, first bar connects the corresponding translational frame respectively.
9. the airstair according to claim 1 with gear fitted economic unlocking structure, which is characterized in that the rolling
Ballscrew is provided with positioning region on one end of the folding part, and the positioning region is formed with limit protrusion,
Safety structure is provided on the folded frame, the safety structure includes operation portion, connector and fixing piece, described solid
Determine part to be arranged on the connection tablet, the fixing piece is formed with limiting groove, the connector connect the operation portion and
The fixing piece, the operation portion control the connector that the fixing piece is driven to move in the vertical direction.
10. the airstair according to claim 9 with gear fitted economic unlocking structure, which is characterized in that described
Operation portion includes locating part and shaft, and the locating part connects the connector by the shaft, opened on the folded frame
Equipped with arc track, multiple locating slots are offered on the arc track, the locating part drives the connector around described turn
Shaft rotation is moved to drive the fixing piece raising and lowering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810141045.9A CN108248816A (en) | 2018-02-11 | 2018-02-11 | Airstair with gear fitted economic unlocking structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810141045.9A CN108248816A (en) | 2018-02-11 | 2018-02-11 | Airstair with gear fitted economic unlocking structure |
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| Publication Number | Publication Date |
|---|---|
| CN108248816A true CN108248816A (en) | 2018-07-06 |
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| CN201810141045.9A Pending CN108248816A (en) | 2018-02-11 | 2018-02-11 | Airstair with gear fitted economic unlocking structure |
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| CN205615705U (en) * | 2016-04-04 | 2016-10-05 | 蓝灿玉 | A automatically contract staircase device that delivers from godown for space flight and aviation |
| CN106976547A (en) * | 2017-03-31 | 2017-07-25 | 成都富力威航科技有限公司 | A kind of built-in folding airstair of aircraft airborne |
| CN208325601U (en) * | 2018-02-11 | 2019-01-04 | 江苏恒铭达航空设备有限公司 | Airstair with gear fitted emergent unlocking structure |
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