CN114455061B - Folding device and unmanned aerial vehicle transmission system - Google Patents
Folding device and unmanned aerial vehicle transmission system Download PDFInfo
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- CN114455061B CN114455061B CN202210107874.1A CN202210107874A CN114455061B CN 114455061 B CN114455061 B CN 114455061B CN 202210107874 A CN202210107874 A CN 202210107874A CN 114455061 B CN114455061 B CN 114455061B
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- gear
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- face gear
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 91
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
- B64C1/061—Frames
- B64C1/063—Folding or collapsing to reduce overall dimensions, e.g. foldable tail booms
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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
- B64C1/30—Parts of fuselage relatively movable to reduce overall dimensions of aircraft
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- 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
- B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Agricultural Machines (AREA)
Abstract
The invention discloses a folding device and an unmanned aerial vehicle transmission system, wherein the folding device comprises: the first folding mechanism comprises a first bearing seat fixedly arranged on the machine body through a first connecting seat, a first gear shaft which is adapted to the first bearing seat and is connected with the end part of the first transmission shaft, and a first end face gear which is connected with the first gear shaft; the second folding mechanism comprises a second bearing seat fixedly arranged on the support arm through a second connecting seat, a second gear shaft which is matched in the second bearing seat and is connected with the end part of the second transmission shaft, a second end face gear connected with one end of the second gear shaft, and a pressure spring sleeved on the second gear shaft; the first connecting seat is hinged with the second connecting seat; when the support arm is unfolded, the second face gear is coaxial with and meshed with the first gear, and the second transmission shaft is in transmission joint with the first transmission shaft; when the support arm is folded, the second end face gear is separated from the first gear, and the second transmission shaft is disconnected from the first transmission shaft. Unmanned aerial vehicle transmission system includes folding device.
Description
Technical Field
The invention relates to the technical field of unmanned aerial vehicles, in particular to a folding device and an unmanned aerial vehicle transmission system.
Background
As shown in fig. 1 and 2, the prior art is a dual rotor unmanned helicopter. Two groups of rotor wings 3 of the horizontal double-rotor wing unmanned helicopter are respectively positioned on support arms 2 at the left side and the right side of a fuselage 1 of the unmanned helicopter, and the support arms 2 and blades 31 of the rotor wings 3 are unfolded or folded; with reference to fig. 3, the power of the engine 4 inside the fuselage 1 is transmitted to the left and right rotor 3 through a mechanical transmission system; the horizontal unmanned helicopter has better hovering and forward flying performance, but the larger transverse distance between the double rotor wings 3 enables the occupied area of the helicopter to be large, and certain difficulty is brought to storage and transportation of the horizontal unmanned helicopter due to overlarge transverse dimension when the horizontal unmanned helicopter is parked on the ground.
In order to facilitate storage and transportation, the support arm 2 is detached from the joint with the machine body 1 in a traditional method, and is stored with the machine body 1 in a segmented mode, so that the operation is complex, multiple people are needed to cooperate, and the time period is long.
For this reason, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
The invention aims to: the utility model provides a folding device and unmanned aerial vehicle transmission system for solve current unmanned aerial vehicle and store and transport inconvenient problem, realize through folding device that the transmission joint between support arm and the fuselage is reliable in the support arm expansion process, the purpose of transmission disconnection between support arm and the fuselage in the support arm folding process.
The technical scheme is as follows: the present invention provides a folding device comprising: the first folding mechanism comprises a first bearing seat, a first gear shaft which is adapted to the first bearing seat, and a first end face gear which is connected with one end of the first gear shaft, wherein the other end of the first gear shaft is connected with the end part of a first transmission shaft which is arranged in an engine of a machine body, and the first bearing seat is fixedly arranged on the machine body through a first connecting seat; the second folding mechanism comprises a second bearing shaft, a second gear shaft, a second end face gear and a pressure spring, wherein the second gear shaft is matched in the second bearing shaft, the second end face gear is connected with one end of the second gear shaft, the pressure spring is sleeved on the second gear shaft and positioned between the second gear and the second bearing seat, the other end of the second gear shaft is connected with the end part of a second transmission shaft in a support arm, and the second bearing seat is fixedly arranged on the support arm through a second connecting seat; the first connecting seat is rotationally connected with the second connecting seat; when the support arm is unfolded, the second face gear is coaxial with and meshed with the first face gear, so that the second transmission shaft is in transmission engagement with the first transmission shaft; when the support arm is folded, the second face gear is separated from the first face gear, so that the second transmission shaft is disconnected from the first transmission shaft.
Further, the first end face gear and the second end face gear are provided with bevel gears; the bevel teeth of the second face gear are for meshing with the bevel teeth of the first face gear.
Further, when the support arm is unfolded, the support arm drives the bevel gear of the second face gear to be in guiding fit with the bevel gear of the first face gear, so that the second face gear and the first face gear are coaxially arranged, the machine body drives the first face gear to push the second face gear to be close to the second bearing seat, and the pressure spring is in a compressed state to push the second face gear to be meshed with the first face gear; the second face gear is coaxially arranged with the first face gear and is meshed with the bevel gear, so that the first folding mechanism and the second folding mechanism are in a closed state.
Further, the first gear shaft is in rotary fit with the first bearing seat through a bearing, and the second gear shaft is in rotary fit with the second bearing seat through a bearing; the first transmission shaft is used for adjusting the displacement of the first end face gear through the first transmission shaft.
Further, the first connecting seat and the second connecting seat relatively rotate around a rotation axis through at least two groups of rotation components; the folding mechanism is used for realizing the closed state or the open state between the first folding mechanism and the second folding mechanism by adjusting the relative rotation between the first connecting seat and the second connecting seat.
Further, each group of rotating assemblies comprises a first hinging seat arranged on one side surface of the first connecting seat and a second hinging seat arranged on one side surface of the second connecting seat, and the first hinging seat is hinged with the second hinging seat through a pin shaft.
Further, the first hinge seat is a support seat arranged at any one of four corners of the first connecting seat, and the second hinge seat is a lug arranged at any one of four corners of the second connecting seat.
Further, the two supports of the first connecting seat are respectively arranged on the rotating shaft line, the two lugs of the second connecting seat are respectively arranged on the rotating shaft line, and the lugs on the rotating shaft line are in one-to-one correspondence with the supports and are hinged to realize that the first folding mechanism and the second folding mechanism are in an open state; when each lug is correspondingly embedded in a support, the first connecting seat and the second connecting seat are in butt joint embedding, so that the first folding mechanism and the second folding mechanism are in a closed state.
Further, the first connecting seat is fixedly connected with the machine body, the first bearing seat is fixedly arranged on the first connecting seat, and the first end face gear is fixedly connected with the first gear shaft; the second connecting seat is integrally connected with the support arm, the second bearing seat is fixedly arranged on the second connecting seat, and the second end face gear is fixedly connected with the second gear shaft; the support is connected with the first connecting seat in an integrated way, and the lug is connected with the second connecting seat in an integrated way.
The invention also provides an unmanned aerial vehicle transmission system, which comprises the folding device.
The beneficial effects are that: according to the folding device and the unmanned aerial vehicle transmission system, when the support arm is unfolded, the support arm drives the second face gear to be coaxially arranged with the first face gear and meshed with the second face gear, so that the second transmission shaft is in transmission engagement with the first transmission shaft, and reliable engagement of the unmanned aerial vehicle transmission system is realized; when the support arm is folded, the support arm drives the second face gear to be separated from the first face gear, and the first connecting seat and the second connecting seat relatively rotate, so that the second transmission shaft is disconnected from the first transmission shaft in a transmission manner, and the transmission disconnection of the unmanned aerial vehicle transmission system is realized; the support arm is simple and rapid to realize transmission engagement or transmission disconnection of the unmanned aerial vehicle transmission system, so that the occupied area of the unmanned aerial vehicle can be effectively reduced, and the unmanned aerial vehicle is easy to store and transport.
Drawings
FIG. 1 is an expanded schematic view of a prior art tandem twin-rotor unmanned helicopter;
FIG. 2 is a folding schematic of the dual rotor unmanned helicopter of FIG. 1;
FIG. 3 is a schematic illustration of the in-fuselage engine of FIG. 1 transmitting power to the rotor;
FIG. 4 is a schematic diagram illustrating an assembly of a first folding mechanism and a second folding mechanism according to the present invention;
FIG. 5 is a schematic view of the first folding mechanism and the second folding mechanism in FIG. 4 in a disconnected state;
fig. 6 is a schematic view of the first folding mechanism and the second folding mechanism in an engaged state in fig. 4.
Detailed Description
The technical scheme provided by the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 4 to 6, the present invention further provides a folding device 5, which includes a first folding mechanism disposed on a body 1, and a second folding mechanism disposed on a support arm 2, wherein the first folding mechanism is associated with the second folding mechanism.
The first folding mechanism comprises a first end face gear 11, a first gear shaft 110, a first connecting seat 7 and a first bearing seat 14; the first bearing seat 14 is connected to the machine body 1 through the first connecting seat 7, specifically, the first connecting seat 7 is fixedly arranged on the machine body 1, and the first bearing seat 14 is fixedly arranged on the first connecting seat 7; the first gear shaft 110 is fitted in the first bearing seat 14, and one end of the first gear shaft 110 is fixedly connected with the first end face gear 11, and the other end is used for connecting with the end of the first transmission shaft 9 in the engine 4 on the machine body 1.
The second folding mechanism comprises a second face gear 12, a second bearing seat 13, a second connecting seat 10, a pressure spring 8 and a second gear shaft 120; the second bearing seat 13 is connected to a support arm 2 through a second connecting seat 10, the second connecting seat 10 is integrally connected with the support arm 2, and the second bearing seat 13 is fixedly connected with the second connecting seat 10; a second gear shaft 120 is adapted to the second bearing 13, one end of the second gear shaft 120 is fixedly connected with the second face gear 12, the other end of the second gear shaft 120 is used for connecting with an end of a second transmission shaft 6 arranged in the support arm 2, and the other end of the second transmission shaft 6 is connected with the rotor 3; the pressure spring 8 is movably sleeved on the second gear shaft 120 and is positioned between the second face gear 12 and the second bearing seat 13.
In the embodiment of the present application, the first gear shaft 110 is rotationally matched in the first bearing seat 14 through a bearing, the second gear shaft 120 is rotationally matched in the second bearing seat 13 through a bearing, and the bearing adopts a general rolling bearing; through the running fit between the first gear shaft 110 and the first bearing seat 14, the two ends of the first gear shaft 110 are respectively connected with the first end face gear 11 and the first transmission shaft 9, so that the first transmission shaft 9 drives the first end face gear 11 to move relative to the first bearing seat 14; through the running fit between the second gear shaft 120 and the second bearing pedestal 13, the two ends of the second gear shaft 120 are respectively connected with the second face gear 12 and the second transmission shaft 6, so that the second transmission shaft 6 drives the second face gear 12 to move relative to the first bearing pedestal 13.
In the embodiment of the present application, the first face gear 11 and the second face gear 12 are provided with bevel gears; the bevel gear of the second face gear 12 is for meshing with the bevel gear of the first face gear 11.
The first connecting seat 7 and the second connecting seat 10 relatively rotate around a rotation axis 15 through at least two groups of rotation components; each group of rotating components comprises a first hinging seat 71 arranged on one side surface of the first connecting seat 7 and a second hinging seat 101 arranged on one side surface of the second connecting seat 10, wherein the first hinging seat 71 is hinged with the corresponding second hinging seat 101, so that the first connecting seat 7 and the second connecting seat 10 can relatively rotate.
In this embodiment, the first hinge seat 71 is a support seat disposed at any one of four corners of the first connecting seat 7, and the second hinge seat 101 is a lug disposed at any one of four corners of the second connecting seat 10, and the support seat and the lug are in one-to-one correspondence. When each lug is correspondingly embedded in a support, the first connecting seat 7 is in butt joint with the second connecting seat 10; the two supports of the first connecting seat 7 are respectively located on the rotation axis 15, the two lugs of the second connecting seat 10 are respectively located on the rotation axis 15, and the lugs located on the rotation axis 15 are in one-to-one correspondence with the supports and are hinged.
In other embodiments, the first hinge seat 71 is a lug provided at any one of four corners of the first connecting seat 7, and the second hinge seat 101 is a support provided at any one of four corners of the second connecting seat 10, and the lugs are in one-to-one correspondence with the supports.
When the support arm 2 is folded, the second transmission shaft 6 axially extending in the support arm 2 and the first transmission shaft 9 on the engine 4 of the machine body 1 need to be disconnected, and the first folding mechanism and the second folding mechanism of the folding device 5 are in a disconnected state so as to adjust the disconnection state between the first transmission shaft 9 of the engine 4 on the machine body 1 and the second transmission shaft 6 arranged in the support arm 2; when the support arm 2 is unfolded, the second transmission shaft 6 in the support arm 2 needs to be jointed with the first transmission shaft 9 of the machine body 1, and the first folding mechanism and the second folding mechanism of the folding device 5 are in a closed state so as to adjust the joint state between the first transmission shaft 9 of the engine 4 on the machine body 1 and the second transmission shaft 6 arranged in the support arm 2.
In this embodiment, the support arm 2 is pushed by a single person to fold the support arm 2 and the blade 31 of the rotor wing 3, so that the operation is simple and rapid, and the folding of the support arm 2 can be realized by a single person.
When the support arm 2 is folded, the support arm 2 is manually pushed to fold so as to drive the second face gear 12 to move, so that the second face gear 12 is disconnected with the first face gear 11, the first connecting seat 7 and the second connecting seat 10 are rotationally connected around the rotation axis 15, the first folding mechanism and the second folding mechanism are in an open state, and the power transmission between the first transmission shaft 9 of the machine body 1 and the second transmission shaft 6 of the support arm 2 is disconnected.
When the support arm 2 is unfolded, the support arm 2 is manually pushed to be unfolded so as to drive the second face gear 12 to approach the first face gear 11, and under the guiding cooperation effect between the bevel gear of the second face gear 12 and the bevel gear of the first face gear 11, the second face gear 12 and the first face gear 11 are coaxially configured; the first transmission shaft 9 of the engine 4 of the machine body 1 is used for transmitting power to drive the first end face gear 11 to push the second end face gear 12 to be close to the second bearing 13, so that the pressure spring 8 between the second end face gear 12 and the second bearing 13 is in a compressed state, the pressure spring 8 in the compressed state provides a certain restoring force for the second end face gear 12 to push the second end face gear 12 to be meshed with the first end face gear 11, the first folding mechanism and the second folding mechanism are in a closed state, and accordingly the first transmission shaft 9 of the machine body 1 is in transmission engagement with the second transmission shaft 6 of the support arm 2, and the power of the first transmission shaft 9 of the engine 4 of the machine body 1 is transmitted to the two side rotary wings 3 respectively connected with the second transmission shaft 6 through the folding device, so that reliable engagement of an unmanned aerial vehicle transmission system is achieved.
The utility model provides an unmanned aerial vehicle transmission system, includes fuselage 1, locates two support arms 2 of fuselage 1 both sides respectively and locates rotor 3 on each support arm 2, still includes folding device 5. The engine 4 in the body 1 has a said first drive shaft 9 and a said second drive shaft 6 is provided in each arm 2. When the support arm 2 is folded, the first folding mechanism and the second folding mechanism are in an open state, so that power transmission between the first transmission shaft 9 of the machine body 1 and the second transmission shaft 6 of the support arm 2 is disconnected. When the support arm 2 is unfolded, when the first folding mechanism and the second folding mechanism of the folding device 5 are in a closed state, the first transmission shaft 9 of the machine body 1 is in transmission engagement with the second transmission shaft 6 of the support arm 2, and the power of the first transmission shaft 9 of the engine 4 of the machine body 1 is transmitted to the two side rotary wings 3 respectively connected with the second transmission shaft 6 through the folding device, so that the reliable engagement of the unmanned aerial vehicle transmission system is realized.
According to the folding device 5 and the unmanned aerial vehicle transmission system, the folding device 5 folds and unfolds the support arm 2 under the operation of a single person, so that the operation is simple and rapid, the occupied area of the unmanned aerial vehicle can be effectively reduced, and the unmanned aerial vehicle is easy to store and transport; through the rotary connection between the first folding mechanism and the second folding mechanism of the folding device 5, when the support arm 2 is unfolded, the support arm 2 drives the second face gear 12 to be coaxially arranged with the first face gear 11 and meshed with the second face gear, so that the second transmission shaft 6 is in transmission engagement with the first transmission shaft 9, and the reliable engagement of the unmanned aerial vehicle transmission system is realized; when the support arm 2 is folded, the support arm 2 drives the second face gear 12 to be separated from the first face gear 11, so that the transmission of the second transmission shaft 6 and the transmission of the first transmission shaft 9 are disconnected, and the transmission disconnection of the unmanned aerial vehicle transmission system is realized; the drive engagement or the drive disengagement between the first drive shaft 9 in the fuselage 1 and the second drive shaft 6 in the arm 2 can be reliably achieved.
Claims (8)
1. A folding device (5), characterized by comprising:
the first folding mechanism comprises a first bearing seat (14), a first gear shaft (110) which is matched in the first bearing seat, and a first end face gear (11) which is connected with one end of the first gear shaft, wherein the other end of the first gear shaft is connected with the end part of a first transmission shaft (9) which is arranged in an engine (4) of the machine body (1), and the first bearing seat is fixedly arranged on the machine body (1) through a first connecting seat (7);
the second folding mechanism comprises a second bearing seat, a second gear shaft (120) which is matched in the second bearing seat, a second end face gear (12) which is connected with one end of the second gear shaft, and a pressure spring (8) which is sleeved on the second gear shaft and is positioned between the second gear and the second bearing seat, wherein the other end of the second gear shaft is connected with the end part of a second transmission shaft (6) which is arranged in a support arm (2), and the second bearing seat is fixedly arranged on the support arm through a second connecting seat (10);
the first connecting seat is hinged with the second connecting seat; when the support arm is unfolded, the second gear is coaxial with the first gear and meshed with the first gear so that the second transmission shaft is in transmission engagement with the first transmission shaft; when the support arm is folded, the second gear is separated from the first gear, so that the second transmission shaft is disconnected from the first transmission shaft;
the first end face gear and the second end face gear are provided with bevel gears;
when the support arm is unfolded, the support arm drives the bevel gear of the second face gear to be in guiding fit with the bevel gear of the first face gear, so that the second face gear and the first face gear are coaxially arranged, the machine body drives the first face gear and is used for pushing the second face gear to be close to the second bearing seat, and the pressure spring is in a compressed state and is used for pushing the second face gear to be meshed with the first face gear.
2. The folding device of claim 1, wherein the first gear shaft is rotatably fitted in the first bearing housing via a bearing and the second gear shaft is rotatably fitted in the second bearing housing via a bearing.
3. Folding device according to claim 1, characterized in that the first connection seat and the second connection seat are turned relative to each other about a rotation axis (15) by means of at least two sets of turning elements.
4. A folding device according to claim 3, wherein each set of rotating assemblies comprises a first hinge base (71) provided on a side surface of the first connecting base, and a second hinge base (101) provided on a side surface of the second connecting base, the first hinge base being hinged to the second hinge base by means of a pin.
5. The folding device of claim 4, wherein the first hinge base is a support located at any one of four corners of the first connecting base, and the second hinge base is a lug located at any one of four corners of the second connecting base.
6. The folding device according to claim 5, wherein the two supports of the first connecting seat are respectively arranged on the rotation axis, the two lugs of the second connecting seat are respectively arranged on the rotation axis, and the lugs on the rotation axis are in one-to-one correspondence with the supports and are hinged; when each lug is correspondingly embedded in a support, the first connecting seat and the second connecting seat are in butt joint embedding.
7. The folding device of claim 5, wherein the first connecting seat is fixedly connected with the machine body, the first bearing seat is fixedly arranged on the first connecting seat, and the first end face gear is fixedly connected with the first gear shaft; the second connecting seat is integrally connected with the support arm, the second bearing seat is fixedly arranged on the second connecting seat, and the second end face gear is fixedly connected with the second gear shaft; the support is connected with the first connecting seat in an integrated way, and the lug is connected with the second connecting seat in an integrated way.
8. A unmanned aerial vehicle drive system comprising a folding device as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210107874.1A CN114455061B (en) | 2022-01-28 | 2022-01-28 | Folding device and unmanned aerial vehicle transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210107874.1A CN114455061B (en) | 2022-01-28 | 2022-01-28 | Folding device and unmanned aerial vehicle transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114455061A CN114455061A (en) | 2022-05-10 |
| CN114455061B true CN114455061B (en) | 2023-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210107874.1A Active CN114455061B (en) | 2022-01-28 | 2022-01-28 | Folding device and unmanned aerial vehicle transmission system |
Country Status (1)
| Country | Link |
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| CN (1) | CN114455061B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109733587B (en) * | 2016-10-27 | 2021-03-05 | 深圳市大疆创新科技有限公司 | Coupling assembling, unmanned vehicles's horn and unmanned vehicles |
| CN109383739A (en) * | 2017-08-04 | 2019-02-26 | 深圳市道通智能航空技术有限公司 | A kind of horn and unmanned plane |
| US20200282847A1 (en) * | 2018-10-25 | 2020-09-10 | Dawei Dong | Helicopter using electric propeller torque arm as a power source to drive a main rotor |
| CN109334972A (en) * | 2018-11-05 | 2019-02-15 | 深圳市金鑫城纸品有限公司 | A kind of quadrotor drone with landing buffer function |
| CN110920876A (en) * | 2019-11-29 | 2020-03-27 | 彩虹无人机科技有限公司 | Foldable unmanned aerial vehicle transmission system |
| CN214165276U (en) * | 2020-12-30 | 2021-09-10 | 广州极飞科技股份有限公司 | Coupling assembling, frame and unmanned aerial vehicle |
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2022
- 2022-01-28 CN CN202210107874.1A patent/CN114455061B/en active Active
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| CN114455061A (en) | 2022-05-10 |
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