CN113716013A - A can abandon formula flap that is used for unmanned aerial vehicle gasbag pressurization to uncap and unmanned aerial vehicle thereof - Google Patents
A can abandon formula flap that is used for unmanned aerial vehicle gasbag pressurization to uncap and unmanned aerial vehicle thereof Download PDFInfo
- Publication number
- CN113716013A CN113716013A CN202111179294.5A CN202111179294A CN113716013A CN 113716013 A CN113716013 A CN 113716013A CN 202111179294 A CN202111179294 A CN 202111179294A CN 113716013 A CN113716013 A CN 113716013A
- Authority
- CN
- China
- Prior art keywords
- unmanned aerial
- aerial vehicle
- flap
- gasket
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000010923 batch production Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- 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
- B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
- B64D45/04—Landing aids; Safety measures to prevent collision with earth's surface
- B64D45/06—Landing aids; Safety measures to prevent collision with earth's surface mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U70/00—Launching, take-off or landing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a disposable cover cap for an unmanned aerial vehicle air bag pressurization cover opening and an unmanned aerial vehicle thereof. The invention separates the body and the cover main body through stress groove fracture and bonding surface debonding, thereby realizing two modes of cover opening suitable for unmanned aerial vehicle airbag pressurization. The cover opening mode of the disposable cover cap is simple in structure, efficient in cover opening process, low in production cost and suitable for batch production.
Description
Technical Field
The invention relates to the technical field of unmanned aerial vehicles, in particular to a disposable cover cap for an unmanned aerial vehicle airbag pressurization cover and an unmanned aerial vehicle thereof.
Background
The parachute landing and the airbag landing are one of the existing landing modes adopted by many small and medium-sized unmanned aerial vehicles, the landing mode does not need a complex undercarriage system, and the compact design and the light-weight design of the unmanned aerial vehicle can be realized. The cushioning airbag is typically placed inside the fuselage with a disposable flap disposed outside of the airbag. Make the gasbag inflation through filling high-pressure air before the landing, the flap expands under the effect of inflation power and drops, finally realizes unmanned aerial vehicle's buffering landing. According to the difference of the cover opening mode, the throwable cover opening cover has two types of a mechanical cover opening scheme and a stress type cover opening scheme.
The Chinese invention patent with publication number CN 106335627A, namely a releasable cover, provides a mechanical buckle type releasable cover. The uncovering mode of the cover is a cutter or electric explosion tube removing mode, the structure is complex, the cost is high, and the cover is difficult to be suitable for the uncovering mode of the air bag. The Chinese invention patent of publication No. CN 111717374A, "an air bag landing type small and medium-sized unmanned aerial vehicle cover structure capable of being thrown", provides a cover capable of being thrown, which is fixed and opened by a rope. This flap structure occupation space is big, need set up dedicated automatically controlled rope cutter, is difficult to be applicable to the unmanned aerial vehicle structure that has the space requirement. The Chinese invention patent with publication number CN 107618652A 'a rapid detaching structure and a jacking device for a flap of an unmanned aerial vehicle', provides a mechanical cover opening mechanism for the flap of the unmanned aerial vehicle, and the mechanism or the device is mainly used for ground maintenance of the unmanned aerial vehicle, has large volume and is not suitable for a flap which can be thrown. Above three patents all belong to the mechanical type scheme of uncapping, and the mechanical type scheme of uncapping needs comparatively complicated mechanical structure to be used for connecting the flap and releasing the flap, therefore needs to occupy great space and arranges this mechanism, still needs extra control system/procedure to realize uncapping the action simultaneously.
The Chinese invention patent with publication number CN 109896030B, unmanned aerial vehicle air bag door and unmanned aerial vehicle with the same, provides a disposable air bag door scheme with a semicircular gasket pre-embedded in a door skin. This scheme needs pre-buried gasket when the flap shaping, has provided higher requirement to the location of gasket in the flap, has improved the forming process degree of difficulty, has increased manufacturing cost. In addition, the cover is opened by tearing the fiber skin through the gasket with higher strength, the covering scheme belongs to the destructive covering scheme, and the cover opening force of the cover is difficult to control, so that the cover opening reliability is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a disposable cover cap for an unmanned aerial vehicle airbag pressurization cover and an unmanned aerial vehicle thereof.
In order to solve the technical problem, the invention firstly discloses a disposable cover for an unmanned aerial vehicle air bag pressurization cover opening, which comprises a cover main body capable of being separated from a machine body of the unmanned aerial vehicle, wherein a fastener hole for connecting the cover main body and the machine body through a fastener is formed in the cover main body, a stress groove for separating the fastener and the machine body through air bag expansion and fracturing is formed in the outer side of the fastener hole of the cover main body, and a bonding surface for detachably bonding the machine body and the cover main body is further formed in the cover main body.
Further, the cover body is provided with a stepped hole, the stepped hole comprises a counter bore facing the machine body and a through hole arranged at the bottom of the counter bore, one end of the gasket is clamped in the counter bore, the other end of the gasket is inserted in the through hole, and the stress groove is formed in the circumferential direction of the gasket.
Furthermore, the gasket is provided with a cross groove capable of accelerating fracture on the inner side of the stress groove, and the gasket is divided into a plurality of fractured lugs through the cross groove and the stress groove.
Further, the fastener is a countersunk head screw, and the fastener hole is a countersunk head screw hole capable of accommodating a screw head of the countersunk head screw.
Further, the screw head and the gasket of the countersunk head screw are flush with the side wall of the machine body.
Further, the thickness of the bonding surface is H, the thickness of the stress groove is t, and H is 2 t; and when the cover opening force of a single countersunk head screw is 50-100N, t is 0.5-1 mm.
Further, the maximum outer diameter of the gasket satisfies:
wherein, the sigma is the adhesive strength, and the unit is MPa; n is the number of the countersunk head screws; f is the cover opening force of a single countersunk head screw, and the unit is N; r is in mm.
Then, the invention discloses an unmanned aerial vehicle, which comprises a machine body, a countersunk screw and the disposable cover cap, wherein the cover cap main body is connected with the machine body through the countersunk screw, the bonding surface is provided with a bonding material for bonding the cover cap main body and the machine body, and when the air bag expands, the gasket is broken and is separated from the countersunk screw or the bonding surface is debonded from the cover cap main body.
Compared with the prior art, the invention has the advantages that:
the invention separates the body and the cover main body through stress groove fracture and bonding surface debonding, thereby realizing two modes of cover opening suitable for unmanned aerial vehicle airbag pressurization. The cover opening mode of the disposable cover cap is simple in structure, efficient in cover opening process, low in production cost and suitable for batch production.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
FIG. 1 is an axial schematic view of a disposable flap for an unmanned aerial vehicle airbag pressurized door as disclosed in an embodiment of the present invention;
FIG. 2 is a schematic view of the connection of the gasket, the flap body and the countersunk head screw according to the embodiment of the present invention;
FIG. 3 is an axial view of a spacer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a dimensional design of a gasket according to an embodiment of the disclosure;
fig. 5 is a schematic diagram of a stress groove fracture when an unmanned aerial vehicle airbag is opened by pressurization, which is disclosed by the embodiment of the invention;
fig. 6 is a schematic diagram of debonding of the bonding surface when the airbag of the unmanned aerial vehicle is opened by pressurization.
Illustration of the drawings:
1. a flap body; 11. a stepped hole; 111. a counter bore; 112. a through hole; 2. a gasket; 201. bonding surface; 202. a stress slot; 203. a tab; 204. a cross groove; 205. countersunk screw holes; 3. a body; 4. countersunk head screw.
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
As shown in fig. 1-6, the embodiment of the invention discloses a disposable flap for an unmanned aerial vehicle airbag pressurization cover opening, which comprises a flap main body 1 separable from a body 3 of the unmanned aerial vehicle, wherein a fastener hole for connecting the flap main body 1 and the body 3 through a fastener is arranged on the flap main body 1, in the embodiment, the fastener is a countersunk screw 4, the fastener hole is a countersunk screw hole 205 capable of accommodating a screw head of the countersunk screw 4, a stress groove 202 for airbag inflation and fracturing to separate the fastener from the body 3 is arranged on the outer side of the fastener hole of the flap main body 1, the structure at the stress groove 202 is relatively weak, and the stress groove 202 can break first when the airbag is inflated and pressurized. The cover body 1 is also provided with an adhesive surface 201 for detachably adhering the body 3 and the cover body 1 in parallel, and the cover body 1 can be adhered through the adhesive surface 201 when the airbag is not inflated and pressurized. Therefore, this application makes flap main part 1 separate from organism 3 through stress groove 202 fracture and bonding face 201 debond and make unmanned aerial vehicle have two kinds of gasbag pressurization modes of uncapping, as long as wherein any one of them mode of uncapping normally works and can guarantee to uncap smoothly. The success rate of uncapping is obviously improved through the mode of double insurance. In this embodiment, the flap body 1 is a carbon fiber composite flap.
Specifically, in order to form the stress groove 202 and the bonding surface 201, the circular gasket 2 provided with the fastener hole is used for realizing the method, wherein the cover body 1 is provided with the stepped hole 11, the stepped hole 11 comprises a counter bore 111 and a through hole 112 arranged at the bottom of the counter bore 111, the counter bore 111 faces the machine body 3, a flange at one end of the gasket 2 is clamped in the counter bore 111, the other end of the gasket is inserted into the through hole 112, and the stress groove 202 is formed in the circumferential direction of the gasket 2. The outer diameter of the flange at one end of the gasket 2 is smaller than the inner diameter of the counterbore 111, so that a bonding surface 201 is formed between the flange and the counterbore 111 for filling with a bonding material. Meanwhile, a cross groove 204 for accelerating fracture is arranged on the inner side of the stress groove 202 of the gasket 2, the middle part of the gasket 2 is divided into a plurality of breakable lugs 203 through the cross groove 204 and the stress groove 202, and the lugs 203 are connected with a flange at one end of the gasket 2 through the stress groove 202. When unmanned aerial vehicle gasbag pressurization was uncapped, under the effect of normal force, stress groove 202 fracture to make flap main part 1 break away from organism 3.
In this embodiment, screwhead, the gasket 2 of countersunk screw 4 all set up with the lateral wall parallel and level of organism 3 to guarantee the planarization of junction, reduce the resistance when unmanned aerial vehicle flies.
In the embodiment, the thickness of the bonding surface is H, and the thickness of the stress groove is t, where H is 2 t; and when the cover opening force of a single countersunk head screw is 50-100N, t is 0.5-1 mm. When the uncovering force of a single countersunk head screw is larger than 100N, the thickness of the stress groove is increased properly for t.
In the present embodiment, the adhesive strength between the gasket 2 and the flap body 1 is designed to finally obtain the outer dimensions of the gasket 2. Assuming that the bonding strength of the selected adhesive is σ, the effective bonding area of the bonding surface 201 is
S＝π(R2-r2)；
Where R and R are the outer and inner diameters, respectively, of the bonding surface 201. If N gaskets are uniformly distributed on each opening cover, an
Where F is the uncapping force of the disposable flap,
r＝r0+Δ+a；
wherein r is0Is the head diameter of the countersunk head screw 4, Delta isThe width of the circular stress groove 202, a is the distance between the countersunk head screw 4 and the circular stress groove 202, and preferably Δ is 0.5-1 mm, and a is 1.5-2 mm, so that
The maximum outer diameter of the gasket satisfies:
wherein σ is adhesive strength (MPa); n is the number of the countersunk head screws; f is the cover opening force (N) of a single countersunk head screw; r is in mm.
Then, the invention discloses an unmanned aerial vehicle, which comprises a body 3, a countersunk screw 4 and the disposable flap adopting the scheme, wherein a flap main body 1 is connected with the body 3 through the countersunk screw 4, and a bonding material for bonding the flap main body 1 and the body 3 is arranged on a bonding surface 201. When the air bag expands, the gasket 2 is broken and separated from the countersunk head screw 4 or the bonding surface 201 is debonded from the opening cover main body 1, so that the opening cover can be ensured to be smooth as long as any one of the opening cover modes works normally, and the success rate of opening the cover is obviously improved through a double-insurance mode.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (8)
1. The utility model provides a can abandon formula flap for unmanned aerial vehicle gasbag pressurization is uncapped, include can with flap main part (1) of unmanned aerial vehicle's organism (3) separation, its characterized in that, be provided with on flap main part (1) and be used for connecting through the fastener hole of flap main part (1) and organism (3), flap main part (1) is located the outside in fastener hole is provided with and is used for gasbag inflation fracturing so that stress groove (202) of fastener and organism (3) separation, still be provided with on flap main part (1) and be used for face of bonding (201) that organism (3) and flap main part (1) detachable bond.
2. The disposable cover for the air bag pressurization cover of the unmanned aerial vehicle according to claim 1, further comprising a gasket (2) arranged in the fastener hole, wherein a stepped hole (11) is arranged on the cover body (1), the stepped hole (11) comprises a counter bore (111) facing the machine body (3) and a through hole (112) arranged at the bottom of the counter bore (111), one end of the gasket (2) is clamped in the counter bore (111), the other end of the gasket is inserted in the through hole (112), and the stress groove (202) is arranged on the periphery of the gasket (2).
3. The disposable flap for unmanned aerial vehicle air bag pressurized door release of claim 2, characterized in that the gasket (2) is provided with a cross groove (204) capable of accelerating fracture on the inner side of the stress groove (202), and the gasket (2) is divided into a plurality of breakable tabs (203) by the cross groove (204) and the stress groove (202).
4. The disposable flap for unmanned aerial vehicle air bag pressurized door opening of claim 3, characterized in that the fastener is a countersunk screw (4) and the fastener hole is a countersunk screw hole (205) that can receive a screw head of the countersunk screw (4).
5. The disposable flap for unmanned aerial vehicle airbag pressurized cover opening of claim 4, characterized in that the screw head of the countersunk screw (4), the gasket (2) are all arranged flush with the side wall of the body (3).
6. The disposable flap for unmanned aerial vehicle airbag pressurized door opening according to claim 4, characterized in that the adhesive surface (201) has a thickness H and the stress groove (202) has a thickness t, wherein H-2 t; and when the cover opening force of the single countersunk head screw (4) is 50-100N, t is 0.5-1 mm.
7. The disposable flap for unmanned aerial vehicle airbag pressurized door release of claim 4, characterized in that the maximum outer diameter of the gasket (2) satisfies:
wherein, the sigma is the adhesive strength, and the unit is MPa; n is the number of the countersunk head screws (4); f is the cover opening force of a single countersunk head screw (4), and the unit is N; r is in mm.
8. An unmanned aerial vehicle, characterized in that, including organism (3), countersunk screw (4) and any of claims 4-7 the disposable flap, flap main part (1) pass through countersunk screw (4) with organism (3) are connected, be provided with the bonding on bonding face (201) the bonding material of flap main part (1) and organism (3), during the gasbag inflation, gasket (2) fracture with countersunk screw (4) separation perhaps bonding face (201) with flap main part (1) debond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111179294.5A CN113716013B (en) | 2021-10-08 | 2021-10-08 | Disposable flap for pressurizing and uncovering unmanned aerial vehicle air bag and unmanned aerial vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111179294.5A CN113716013B (en) | 2021-10-08 | 2021-10-08 | Disposable flap for pressurizing and uncovering unmanned aerial vehicle air bag and unmanned aerial vehicle with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113716013A true CN113716013A (en) | 2021-11-30 |
| CN113716013B CN113716013B (en) | 2024-03-15 |
Family
ID=78685736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111179294.5A Active CN113716013B (en) | 2021-10-08 | 2021-10-08 | Disposable flap for pressurizing and uncovering unmanned aerial vehicle air bag and unmanned aerial vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113716013B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243198A (en) * | 1988-08-01 | 1990-02-13 | Sumitomo Heavy Ind Ltd | Material handling machine |
| DE4314207C1 (en) * | 1993-04-30 | 1994-10-20 | Porsche Ag | Airbag impact protection device and method for folding an airbag |
| EP0684166A1 (en) * | 1994-05-25 | 1995-11-29 | Deutsche Fibrit Gesellschaft Ebers & Dr. Müller mbH | Inner liner panel |
| KR101641876B1 (en) * | 2015-07-01 | 2016-07-29 | 한국항공우주산업 주식회사 | Emergency flotation device |
| US20170092137A1 (en) * | 2015-09-29 | 2017-03-30 | Airbus Defence and Space GmbH | Unmanned aerial vehicle and method for safely landing an unmanned aerial vehicle |
| CN208195749U (en) * | 2018-03-09 | 2018-12-07 | 湖南航天环宇通信科技股份有限公司 | Normal direction hole location adjustment mechanism based on mold bushing plate |
| CN111319773A (en) * | 2018-12-17 | 2020-06-23 | 海鹰航空通用装备有限责任公司 | Detachable airbag opening cover separating mechanism for unmanned aerial vehicle |
| CN212313890U (en) * | 2020-09-15 | 2021-01-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Structure of fuel tank opening cover and peripheral area of opening cover of airplane wing |
| CN212667640U (en) * | 2020-06-16 | 2021-03-09 | 青岛中科方舟航空科技有限公司 | Unmanned aerial vehicle parachuting gasbag recovery unit and unmanned aerial vehicle |
| CN112606993A (en) * | 2020-12-24 | 2021-04-06 | 中国航空工业集团公司沈阳飞机设计研究所 | Flap edge scattering suppression device |
-
2021
- 2021-10-08 CN CN202111179294.5A patent/CN113716013B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243198A (en) * | 1988-08-01 | 1990-02-13 | Sumitomo Heavy Ind Ltd | Material handling machine |
| DE4314207C1 (en) * | 1993-04-30 | 1994-10-20 | Porsche Ag | Airbag impact protection device and method for folding an airbag |
| EP0684166A1 (en) * | 1994-05-25 | 1995-11-29 | Deutsche Fibrit Gesellschaft Ebers & Dr. Müller mbH | Inner liner panel |
| KR101641876B1 (en) * | 2015-07-01 | 2016-07-29 | 한국항공우주산업 주식회사 | Emergency flotation device |
| US20170092137A1 (en) * | 2015-09-29 | 2017-03-30 | Airbus Defence and Space GmbH | Unmanned aerial vehicle and method for safely landing an unmanned aerial vehicle |
| CN208195749U (en) * | 2018-03-09 | 2018-12-07 | 湖南航天环宇通信科技股份有限公司 | Normal direction hole location adjustment mechanism based on mold bushing plate |
| CN111319773A (en) * | 2018-12-17 | 2020-06-23 | 海鹰航空通用装备有限责任公司 | Detachable airbag opening cover separating mechanism for unmanned aerial vehicle |
| CN212667640U (en) * | 2020-06-16 | 2021-03-09 | 青岛中科方舟航空科技有限公司 | Unmanned aerial vehicle parachuting gasbag recovery unit and unmanned aerial vehicle |
| CN212313890U (en) * | 2020-09-15 | 2021-01-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Structure of fuel tank opening cover and peripheral area of opening cover of airplane wing |
| CN112606993A (en) * | 2020-12-24 | 2021-04-06 | 中国航空工业集团公司沈阳飞机设计研究所 | Flap edge scattering suppression device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113716013B (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2657135B1 (en) | An aircraft black box | |
| CN102224077B (en) | There is flight recorder and the method thereof of the integrated backup power in the oad of casing | |
| CN205971874U (en) | Unmanned aerial vehicle recovery system | |
| US11333183B2 (en) | Sealant pod self-securing insert | |
| US7309267B1 (en) | Integrated float raft | |
| US9487301B2 (en) | High efficiency external airbag for crash attenuation | |
| US9045222B2 (en) | Constant area vent for external crash attenuation airbag | |
| CN101511674A (en) | Aircraft doorway | |
| EP2902229B1 (en) | Door construction with gap sealing device and method for sealing a gap between a door and a door frame | |
| CN112478203B (en) | Recovery landing system suitable for large-load manned spacecraft | |
| CN108482685A (en) | Unmanned plane recovery system, unmanned plane and recovery method | |
| CN113716013A (en) | A can abandon formula flap that is used for unmanned aerial vehicle gasbag pressurization to uncap and unmanned aerial vehicle thereof | |
| CN109649630B (en) | Convenient quick aerating device of airship gasbag | |
| CN205602148U (en) | A disconnect -type parachute ejection capsule for unmanned aerial vehicle | |
| CN109896030B (en) | Unmanned aerial vehicle gasbag flap and have its unmanned aerial vehicle | |
| CN103466073B (en) | aircraft | |
| WO2010127562A2 (en) | Escaping cabin aeroplane | |
| CN114987771B (en) | Unmanned aerial vehicle and carrier buffering separator | |
| JP2009092133A (en) | Shock absorbing member | |
| CN108945477A (en) | A kind of landing system for unmanned plane recycling | |
| CN201086826Y (en) | Back pushing type veil opening device of minitype pilotless plane | |
| WO2007092015A1 (en) | Aircraft passenger safety capsule | |
| CN212125541U (en) | Split cabin type civil aviation passenger plane | |
| CN206171548U (en) | Steering column assembly and vehicle | |
| KR20160057594A (en) | Buoyancy apparatus of unmanned vtol plane and unmanned vtol plane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |