CN108177774A - A kind of folding horn and more rotor unmanned aircrafts - Google Patents
A kind of folding horn and more rotor unmanned aircrafts Download PDFInfo
- Publication number
- CN108177774A CN108177774A CN201810042427.6A CN201810042427A CN108177774A CN 108177774 A CN108177774 A CN 108177774A CN 201810042427 A CN201810042427 A CN 201810042427A CN 108177774 A CN108177774 A CN 108177774A
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- horn
- folding
- housing
- toothed disc
- push button
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- 230000007704 transition Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
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- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000000338 in vitro Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C39/00—Aircraft not otherwise provided for
- B64C39/02—Aircraft not otherwise provided for characterised by special use
-
- 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
- B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
- B64C1/061—Frames
- B64C1/063—Folding or collapsing to reduce overall dimensions, e.g. foldable tail booms
-
- 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
- B64C1/30—Parts of fuselage relatively movable to reduce overall dimensions of aircraft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
Abstract
The present invention relates to unmanned air vehicle technique fields, more particularly to a kind of folding horn and more rotor unmanned aircrafts, horn, the second folding horn and foldable assembly are folded including host arm, first, foldable assembly includes housing and the push button shaft, toothed disc and the compression spring that are sequentially arranged in from top to bottom in housing, compression spring is set between toothed disc and housing, it is extended upwardly to outside housing at the top of push button shaft, bottom is fixedly connected with toothed disc；One end of host arm is fixedly connected in housing, the first folding horn, the second folding horn one end be rotationally connected with respectively in housing and by being set on first driving cog at the first folding horn end, second driving cog at the second folding horn end is engaged with toothed disc.Folding horn provided by the present invention, folding convenient can effectively improve working efficiency in actual job, reduce the overall volume of more rotor unmanned aircrafts, convenient for the transport and storage of more rotor unmanned aircrafts.
Description
Technical field
The present invention relates to unmanned air vehicle technique fields, and in particular to a kind of folding horn and more rotor unmanned aircrafts.
Background technology
More rotor unmanned aircrafts are called Multi-axis aircraft, are controlled by the independent power system of three or three or more
Various devices are made, simple in structure, control can be realized in the rotating speed coordinated between motor, and attitude of flight vehicle holding capacity is higher, tool
There are boundless use field and researching value.
The horn of more rotor unmanned aircrafts have it is fixed and collapsible, space occupied by fixed horn is larger, leads
The geometric dimension for causing unmanned plane is larger, is not easy to the transport and storage of more rotor unmanned aircrafts；Collapsible horn can reduce
Unmanned plane overall dimensions, still, the existing foldable structure for folding horn is complex, and operation is relatively complicated, to a certain extent
Affect working efficiency.
Invention content
In order to solve the above technical problems, The present invention provides a kind of folding horn and more rotor unmanned aircrafts, can
Efficiently and quickly realize that horn folds, it is easy to operate and conveniently.
In order to reach above-mentioned technique effect, the present invention includes following technical scheme：A kind of folding horn, including host arm,
First folds horn, the second folding horn and foldable assembly, and the foldable assembly includes housing and is sequentially arranged in from top to bottom
Push button shaft, toothed disc and compression spring in housing, the compression spring are set between toothed disc and housing, and the top of the push button shaft is upward
It extends to outside housing, bottom is fixedly connected with toothed disc；One end of the host arm is fixedly connected in the housing, described
First folding horn, second one end for folding horn are rotationally connected in the housing and respectively by being set on the first folding horn
First driving cog at the end, the second the second driving cog for folding the horn end are engaged with toothed disc.
Folding horn provided by the present invention can realize that the first folding horn, the second folding horn are fast with host arm
Speed folds, and only needs downward button press axis, you can toothed disc is driven to move downward by push button shaft so that toothed disc and the first folding
Folded horn, the second folding horn are disengaged from state, so that first folds horn, the second folding machine upper-arm circumference around the button
Shaft rotation is moved, and then is realized and folded, release button after folding, the transmission on toothed disc and the first folding horn, the second folding horn
Tooth engages again, and the first folding horn, second fold to be locked again, avoids occurring shaking phenomenon under folded state, operation letter
Singly and conveniently, it without the folding and fixation of horn additionally can be realized using locking member, improves work efficiency, ensure that folding
The stability of state lower structure.
In addition, the present invention also provides a kind of more rotor unmanned aircrafts, it is described including fuselage and above-mentioned folding horn
Folding horn has multiple and is set around the fuselage, and one end of the host arm for folding horn is connect with the fuselage.
Using above-mentioned technical proposal, including following advantageous effect：Folding horn provided by the present invention, simple in structure, folding
It is folded convenient, when needing to fold, it need to only press push button shaft and horn folding can be realized, it is easy to operate and quick, in actual job
Can effectively improve working efficiency, it is good to collapse effect, reduces the overall volume of more rotor unmanned aircrafts, convenient for more rotors nobody
The transport and storage of aircraft.
Description of the drawings
Fig. 1 is the separate structure schematic diagram provided by the present invention for folding horn；
Fig. 2 is the overall structure diagram provided by the present invention for folding horn；
Fig. 3 is A-A sectional views in Fig. 2；
Fig. 4 is the structure diagram that folding horn provided by the present invention is under folded state；
Fig. 5 is the provided by the present invention second partial schematic diagram for folding horn.
In figure,
1st, host arm；
2nd, first horn is folded；2.1st, the first folding joint；2.2nd, the first driving cog；
3rd, second horn is folded；3.1st, the second folding joint；3.2nd, the second driving cog；
4th, foldable assembly；
4.1st, push button shaft；4.11, press section；4.12, connecting pole；4.13rd, portion is screwed；
4.2nd, upper cover；4.21st, fixation is presented a theatrical performance as the last item on a programme；
4.3rd, lower cover；4.31, limited block；4.32, locating shaft；
4.4th, toothed disc；4.41st, disc gear；4.42, disc base；4.43, limiting slot；4.44, axis hole；
4.5th, compression spring.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, is clearly and completely described the technical solution in the embodiment of the present invention, it is clear that described embodiment is the present invention
Part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
All other embodiments obtained under the premise of creative work are made, shall fall within the protection scope of the present invention.
In the present invention, term " on ", " under ", "left", "right", "front", "rear", " top ", " bottom ", " interior ", " outer ",
" in ", " vertical ", " level ", " transverse direction ", the orientation of the instructions such as " longitudinal direction " or position relationship be based on orientation shown in the drawings or
Position relationship.These terms are not intended to limit indicated dress primarily to preferably describe the present invention and embodiment
It puts, element or component must have particular orientation or constructed and operated with particular orientation.
Also, above-mentioned part term is other than it can be used to indicate that orientation or position relationship, it is also possible to for representing it
His meaning, such as term " on " also be likely used for representing certain relations of dependence or connection relation in some cases.For ability
For the those of ordinary skill of domain, the concrete meaning of these terms in the present invention can be understood as the case may be.
In addition, term " installation ", " setting ", " being equipped with ", " connection ", " connected " " socket " should be interpreted broadly.It for example, can
To be to be fixedly connected, it is detachably connected or monolithic construction；Can be mechanical connection or electrical connection；It can be directly connected,
The connections of two inside between device, element or component are either indirectly connected or are by intermediary.For
For those of ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Unless otherwise indicated, the meaning of " multiple " is two or more.
The present invention is described in further detail below by specific embodiment and with reference to attached drawing.
Embodiment 1：
A kind of folding horn is present embodiments provided, refering to Fig. 1,2,3 and 5, horn 2, second is folded including host arm 1, first
Fold horn 3 and foldable assembly 4, foldable assembly 4 include housing and the push button shaft 4.1 being sequentially arranged in from top to bottom in housing,
Toothed disc 4.4 and compression spring 4.5, compression spring 4.5 are set between toothed disc 4.4 and housing, and the top of push button shaft 4.1 extends upwardly to shell
In vitro, bottom is fixedly connected with toothed disc 4.4, and push button shaft 4.1 moves downward under external force, so as to band moving gear
Disk 4.4 moves up and down；One end of host arm 1 is fixedly connected in housing, and first folds one end that horn 2, second folds horn 3
It is rotationally connected with respectively in the housing and the first driving cog 2.2, the second folding machine by being set on 2 end of the first folding horn
Second driving cog 3.2 at 3 end of arm is engaged with toothed disc 4.4.Under non-folded state, host arm 1, first fold horn 2 and
Second folds horn 3 as Y-shaped, and the first folding horn 2 and second is folded horn 3 and symmetrically set centered on the axis of host arm 1
It puts.
The permanent opening for accepting the host arm 1 is offered on housing and folds horn 2, second for first and folds horn
3 are inserted into and provide the first rotation opening of revolution space, the second rotation opening for it, and one end of the host arm 1 is anchored on institute
State in permanent opening, optionally, the host arm 1 can be fixedly connected with the casing by connector, connector can be screw,
Bolt etc.；First folding horn, the second folding horn are rotated respectively in the described first rotation opening, the second rotation opening,
First, which folds horn 2, second, which folds horn 3, to rotate open horizontal rotation respectively along the first rotation opening, second.
Specifically, when horn is under non-folded state, in the raw, toothed disc 4.4 is respectively with first for compression spring 4.5
It folds the first driving cog 2.2, the second driving cog 3.2 that horn 2, second is folded on horn 3 to engage, thus folds horn by first
2nd, second the fixation locking of horn 3 is folded, when needing to fold horn, downward button press axis 4.1, push button shaft 4.1 is with moving gear
Disk 4.4 moves downward, and toothed disc 4.4 brings pressure to bear on compression spring 4.5,4.5 compressive deformation of compression spring, while first folds horn 2, the
The first driving cog 2.2, the second driving cog 3.2 of two-fold horn 3 are disengaged from state with toothed disc 4.4 respectively, so that
First, which folds horn 2, second, which folds horn 3, to be rotated in the first rotation opening, the second rotation opening to host arm direction, can
Refering to Fig. 4, after certain position is folded to, release button axis 4.1, rebound restores the compression spring 4.5 under compressive state upwards
To original state, while toothed disc 4.4 is pushed up to initial position and folds horn with first under folded state respectively
2nd, the first driving cog 2.2 on the second folding horn 3, the second driving cog 3.2 engage, so as to which first under folded state be folded
Horn 2, second folds horn 3 and is locked with toothed disc 4.4, it is thus achieved that first folds the folding horn 3 of horn 2, second
It is easy to operate and conveniently with the fast folding of host arm 1, it improves work efficiency.
Embodiment 2：
On the basis of above-described embodiment 1, in the present embodiment, the housing of foldable assembly by upper and lower snapping upper cover 4.2 and lower cover
4.3 composition, connected between upper cover 4.2 and lower cover 4.3 by connector, the host arm 1 by connector respectively with upper cover 4.2,
Lower cover 4.3 is fixedly connected.Optionally, connector can be bolt, screw etc., as long as it can realize between upper cover 4.2 and lower cover 4.3
Connection, do not limit herein.
Toothed disc is discoid, including disc base 4.42 and disc gear 4.41 disposed thereon, the toothed disc
4.4 middle parts are equipped with perforative axis hole 4.44, and 4.44 upper end of axis hole is equipped with internal thread, the push button shaft 4.1 and axis hole 4.44
It is threadedly coupled.The push button shaft 4.1 is by the press section 4.11 of integrally connected, connecting pole 4.12 and screws portion 4.13 and forms, institute
It states 4.13 outer surface of the portion of screwing and is equipped with the external screw thread to match with 4.44 internal thread of axis hole；The connecting pole 4.12 is with screwing portion
4.13 junctions form step transition section, and the step transition section is pressed on 4.4 top surface of toothed disc.Push button shaft 4.1 passes through
It screws portion 4.13 to be threadedly coupled with axis hole 4.44, easy for installation, connecting pole 4.12 and the step transition for screwing 4.13 junction of portion
Section be pressed on 4.4 top surface of toothed disc, be conducive to external force being transferred to toothed disc, by press push button shaft 4.1 drive toothed disc to
Lower movement.
Described end of the first folding horn 2 being inserted into the first rotation opening is connected with the first folding joint 2.1, described
The end of the second folding horn 3 being inserted into the second rotation opening is connected with the second folding joint 3.1, optional in the present embodiment
Ground, it is all hollow circular tube, the first folding joint 2.1 and the second folding that host arm 1, first, which folds horn 2 and second and folds horn 3,
It splices and first 3.1 is all flat and offers the through-hole worn for push button shaft respectively.
Preferably, the first rotation opening, the second rotation opening are all that arc shape is open and between the two with host arm axle line
Centered on be symmetrical arranged.The width of first rotation opening folds the diameter of horn, the width of the second rotation opening slightly larger than first
The diameter of horn is folded slightly larger than second, first folds horn, the second folding horn can surround push button shaft in the first rotation respectively
Horizontally rotate in opening, the second rotation opening.
First folding joint, the second folding joint are rotationally connected in the push button shaft successively from top to bottom；Described first
Folding joint bottom inside, the second folding joint bottom inside are respectively equipped with curved portion, and the curved portion is equipped with and disc
The first driving cog 2.2, the second driving cog 3.2 of the engagement of gear 4.41.
In certain preferred embodiments, in order to enable toothed disc 4.4 can only move axially so, it is avoided circumferentially to turn
Dynamic, the circumferentially-spaced of the disc base 4.42 is equipped with multiple limiting slots 4.43, and the 4.3 bottom surface corresponding position of lower cover is equipped with
The limited block 4.31 to match with multiple limiting slots 4.43,4.3 middle part of lower cover are equipped with and 4.44 corresponding positioning of axis hole
Axis 4.32.The correspondence of limited block 4.31 is arranged in the limiting slot 4.43 of disc base 4.42, so as to which toothed disc 4.4 is circumferentially transported
Dynamic, the locating shaft 4.32 at 4.3 middle part of lower cover plays toothed disc vertical positioning action, is conducive to toothed disc 4.4 along locating shaft
4.32 move up and down, the setting of limited block 4.31 and locating shaft 4.32 improve 4.4 and first folding joint 2.1 of toothed disc,
The engagement effect of first driving cog 2.2, the second driving cog 3.2, avoids the occurrence of inconsistent phenomenon on second folding joint 3.1.
In the present embodiment, further, 4.2 middle part of the head cover be recessed inwardly to be formed it is fixed present a theatrical performance as the last item on a programme 4.21, it is described solid
Level pressure platform 4.21 is equipped with the through-hole being inserted into for push button shaft 4.1；First folding joint 2.1, the second folding joint 3.1 are by upper
It is sequentially arranged in the fixation under to present a theatrical performance as the last item on a programme 4.21 bottoms, the toothed disc 4.4 institute between the second folding joint 3.1 and lower cover 4.3
It moves up and down in the space of formation, and the limited block 4.31 is in the limit space of limiting slot 4.43 during up and down motion
It is interior, that is, when toothed disc 4.4 is moved up at the second folding joint of the upper limit 3.1, limited block 4.31 is without departing from limiting slot
4.43, limiting slot 4.43 plays the role of limited block circumferentially to limit always, so as to avoid toothed disc in the process of up and down motion
In there is circumferential movement phenomenon.
Embodiment 3：
On the basis of above-described embodiment 1 and 2, present embodiments provide a kind of more rotor unmanned aircrafts, more rotors without
People's aircraft can be eight rotors, including fuselage and four folding horns around fuselage setting, the folding horn
One end of host arm is connect with the fuselage, and the other end is connect respectively with the first folding horn and the second folding horn.
More rotor unmanned aircrafts that the present embodiment is provided, can collapse horn, so as to fulfill folding, as much as possible
Volume is reduced, saves occupied space, be conducive to transport and is stored.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of folding horn, which is characterized in that including host arm（1）, first fold horn（2）, second fold horn（3）With
Foldable assembly（4）, the foldable assembly（4）The push button shaft being sequentially arranged in including housing and from top to bottom in housing（4.1）, tooth
Wheel disc（4.4）And compression spring（4.5）, the compression spring（4.5）Set on toothed disc（4.4）Between housing, the push button shaft（4.1）'s
Top is extended upwardly to outside housing, bottom and toothed disc（4.4）It is fixedly connected；The host arm（1）One end be fixedly connected on
In the housing, described first folds horn（2）, second fold horn（3）One end be rotationally connected with respectively in the housing
And by being set on the first folding horn（2）First driving cog at the end（2.2）, second fold horn（3）Second transmission at the end
Tooth（3.2）With toothed disc（4.4）Engagement.
2. folding horn according to claim 1, which is characterized in that offered on the housing and accept the host arm
（1）Permanent opening and for first fold horn（2）, second fold horn（3）It is inserted into and provides the of revolution space for it
One rotation opening, the second rotation opening, the host arm（1）One end be anchored in the permanent opening, it is described first fold
Horn（2）, second fold horn（3）Rotation is set on the described first rotation and is open, in the second rotation opening respectively.
3. folding horn according to claim 2, which is characterized in that the housing by upper and lower snapping upper cover（4.2）With
Lower cover（4.3）Composition, the upper cover（4.2）And lower cover（4.3）Between connected by connector.
4. folding horn according to claim 3, which is characterized in that the host arm（1）By connector respectively with it is upper
Lid（4.2）, lower cover（4.3）It is fixedly connected.
5. the folding horn according to claim 1 or 4, which is characterized in that the toothed disc（4.4）To be discoid, including
Disc base（4.42）With disc gear disposed thereon（4.41）, the toothed disc（4.4）Middle part is equipped with perforative axis hole
（4.44）, the axis hole（4.44）Upper end is equipped with internal thread, the push button shaft（4.1）With axis hole（4.44）It is threadedly coupled.
6. folding horn according to claim 5, which is characterized in that the push button shaft（4.1）By the pressing of integrally connected
Portion（4.11）, connecting pole（4.12）And screw portion（4.13）Composition, it is described to screw portion（4.13）Outer surface is equipped with and axis hole
（4.44）The external screw thread that internal thread matches；The connecting pole（4.12）With screwing portion（4.13）Junction forms step transition
Section, the step transition section are pressed on the toothed disc（4.4）Top surface.
7. folding horn according to claim 6, which is characterized in that first folding being inserted into the first rotation opening
Horn（2）The end be connected with the first folding joint（2.1）, the second folding horn being inserted into the second rotation opening（3）
The end be connected with the second folding joint（3.1）, first folding joint（2.1）, the second folding joint（3.1）From top to bottom
It is rotationally connected with the push button shaft successively（4.1）On；First folding joint（2.1）Bottom inside, the second folding joint
（3.1）Bottom inside is respectively equipped with curved portion, and the curved portion is equipped with and disc gear（4.41）First transmission of engagement
Tooth（2.2）, the second driving cog（3.2）.
8. folding horn according to claim 7, which is characterized in that the disc base（4.42）Circumferentially-spaced be equipped with
Multiple limiting slots（4.43）, the lower cover（4.3）Bottom surface corresponding position is equipped with and multiple limiting slots（4.43）The limit to match
Position block（4.31）, the lower cover（4.3）Middle part is equipped with and axis hole（4.44）Corresponding locating shaft（4.32）.
9. folding horn according to claim 8, which is characterized in that the head cover（4.2）Middle part is recessed inwardly to be formed admittedly
Level pressure platform（4.21）, the fixation presents a theatrical performance as the last item on a programme（4.21）It is equipped with for push button shaft（4.1）The through-hole of insertion；First folding joint
（2.1）, the second folding joint（3.1）The fixation is sequentially arranged in from top to bottom to present a theatrical performance as the last item on a programme（4.21）Bottom, the toothed disc（4.4）
In the second folding joint（3.1）With lower cover（4.3）Between move up and down, and described during moving up and down in the space that is formed
Limited block（4.31）In limiting slot（4.43）Limit space in.
10. a kind of more rotor unmanned aircrafts, which is characterized in that described in fuselage and claim 1~9 any one
Horn is folded, the folding horn has multiple and set around the fuselage, one end of the host arm for folding horn and institute
State fuselage connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042427.6A CN108177774A (en) | 2018-01-17 | 2018-01-17 | A kind of folding horn and more rotor unmanned aircrafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810042427.6A CN108177774A (en) | 2018-01-17 | 2018-01-17 | A kind of folding horn and more rotor unmanned aircrafts |
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| Publication Number | Publication Date |
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| CN108177774A true CN108177774A (en) | 2018-06-19 |
Family
ID=62550708
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810042427.6A Pending CN108177774A (en) | 2018-01-17 | 2018-01-17 | A kind of folding horn and more rotor unmanned aircrafts |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109911171A (en) * | 2019-04-30 | 2019-06-21 | 杜双昱 | Horn rotates synchronously structure and the industrial unmanned plane with the structure |
| WO2020038356A1 (en) * | 2018-08-24 | 2020-02-27 | Hangzhou Zero Zero Technology Co., Ltd. | Detachable protection structure for unmanned aerial systems |
| WO2021248278A1 (en) * | 2020-06-08 | 2021-12-16 | 深圳市大疆创新科技有限公司 | Locking member and unmanned aerial vehicle |
| US11319066B2 (en) * | 2018-07-10 | 2022-05-03 | Textron Innovations Inc. | Flying wing aircraft having a compact storage configuration |
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| CN207917154U (en) * | 2018-01-17 | 2018-09-28 | 戴天泽 | A kind of folding horn and more rotor unmanned aircrafts |
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| WO2020038356A1 (en) * | 2018-08-24 | 2020-02-27 | Hangzhou Zero Zero Technology Co., Ltd. | Detachable protection structure for unmanned aerial systems |
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