A wing foldable unmanned aerial vehicle

Abstract

The application relates to an unmanned plane, and belongs to the technical field of unmanned planes, in particular to a wing foldable unmanned plane, which comprises a fuselage, two movable shafts movably installed on the top rear side and the bottom front side of the fuselage, a machine arm fixedly sleeved on the movable shaft, a brushless motor fixedly installed on the machine arm, a rotating shaft fixedly installed on the output end of the brushless motor, four blades movably installed on the rotating shaft, a camera movably embedded on the bottom of the fuselage, a fixing mechanism arranged on the fuselage, and the fixing mechanism comprises a fixing seat, a fixing groove, a movable groove, a first limiting block, a first transmission shaft, a knob, a transmission rod and a transmission bevel gear; the application can conveniently store the unmanned plane, avoids the problem that the machine arm loosens during flight, and solves the problems that the wings of the existing unmanned plane are too large to be stored and the wings are prone to loosening during flight, thereby causing flight failure.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a UAV with foldable wings. Background Technology

[0002] Unmanned aerial vehicles (UAVs) are unmanned aircraft controlled by radio remote control equipment and their own program control devices. They are currently widely used in aerial photography, agricultural plant protection, surveying and mapping and other fields.

[0003] A search of Chinese patent publication number CN108146612A reveals a foldable-wing drone, comprising a fuselage, four wings, and four propellers. Each propeller is positioned at one corner of the fuselage, and each propeller is positioned on one wing. The propellers are connected to the wings via hinges. Each wing has a notch at one end near the fuselage. The drone also includes a sleeve that matches the notch, which is fitted onto the notch of the wing. The sleeve has a buckle, and the fuselage has a slot that matches the buckle.

[0004] Based on the above search results and existing technologies, the following findings were made:

[0005] Because drones have large wings, fixed-wing drones are more difficult to store, while drones with movable wings generate greater impact during flight. If the wings are not fixed, they can easily become loose during flight, causing problems. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a foldable-wing drone, which not only facilitates the storage of the drone but also prevents flight problems caused by loose arms.

[0007] The technical solution to achieve the purpose of this invention is as follows: a foldable wing drone, including a fuselage, two movable shafts are movably installed on the top rear side and bottom front side of the fuselage, an arm is fixedly sleeved on the movable shaft, a brushless motor is fixedly installed on the arm, a rotating shaft is fixedly installed on the output end of the brushless motor, four propellers are movably installed on the rotating shaft, a camera is movably installed in the bottom of the fuselage, and a fixing mechanism is provided on the fuselage.

[0008] The fixing mechanism includes a fixed seat, a fixed groove, a movable groove, a first limiting block, a first transmission shaft, a knob, a transmission rod, and transmission bevel teeth. There are two fixed seats, two fixed grooves, two movable grooves, two first limiting blocks, and two first transmission shafts. The fixed seats are fixedly installed on the two rear arms near the machine body. The fixed grooves are opened on the top wall of the fixed seats, and the movable grooves are opened on the top wall of the machine body. The first limiting blocks are movably installed inside the movable grooves. The two first transmission shafts are movably installed inside the two movable grooves respectively. The first transmission shafts are threadedly connected to the first limiting blocks. The transmission rod is embedded and movably installed on the top wall of the machine body. The knob is fixedly installed on the top wall of the transmission rod. There are three transmission bevel teeth. The three transmission bevel teeth are fixedly sleeved on the bottom of the transmission rod and the two first transmission shafts respectively. The transmission bevel teeth on the transmission rod mesh with the transmission bevel teeth on the two first transmission shafts respectively.

[0009] The fixing mechanism also includes two adjusting blocks, a second drive shaft, a second limiting block, and a limiting groove. The two adjusting blocks are respectively embedded in the left and right sides of the front of the top wall of the machine body. The second drive shaft is fixedly installed on the bottom wall of the adjusting blocks. The second limiting block is movably installed inside the machine body at the position corresponding to the second drive shaft. The second drive shaft and the second limiting block are threadedly connected. The limiting groove is opened on the top wall of the two movable shafts located on the front side.

[0010] In some embodiments, the bottom walls of the four arms are provided with flipping grooves, and a mounting shaft is movably installed inside the flipping grooves near one end of the brushless motor. A shock-absorbing rod is fixedly sleeved on the mounting shaft. The shock-absorbing rod is elastic, and the length of the shock-absorbing rod on the two rear arms is greater than that on the two front arms.

[0011] In some embodiments, two push slots are provided on the arm corresponding to the position of the shock absorber rod. A stop block is movably installed inside the push slot. A sliding groove is provided inside the arm corresponding to the position of the stop block. A slider is movably installed inside the sliding groove. The slider is fixedly connected to the stop block. A connecting magnetic block is movably installed inside each of the two stop blocks. The poles of the connecting magnetic blocks on the two stop blocks that are close to each other are opposite poles.

[0012] In some embodiments, a storage slot is provided on the top wall of the fuselage. Baffles are movably installed on both the front and rear sides of the storage slot via torsion spring shafts. The storage slot contains a parachute and a monitoring device. The monitoring device is electrically connected to the parachute and four brushless motors. A horizontal bar is fixedly installed inside the storage slot, and an electromagnet is embedded in the horizontal bar. The electromagnet is electrically connected to the monitoring device. Fixed magnetic blocks are embedded in the bottom walls of the two baffles. The poles of the fixed magnetic blocks and the electromagnets are opposite poles.

[0013] In some embodiments, two warning lights are fixedly installed on the top of the fuselage.

[0014] Compared with existing technologies, the significant advantages of this invention are:

[0015] Firstly, this invention features a fixing mechanism. When not in flight, the four arms are fixed by the first and second limiting blocks, facilitating the storage of the drone. When flight is required, the arms can be unlocked by using knobs and adjustment blocks. Once the arms are fully extended, they can be fixed again by using knobs and adjustment blocks. This not only facilitates the storage of the drone but also prevents flight problems caused by loose arms.

[0016] Secondly, in this invention, during landing, the shock absorber rod can be flipped out of the flip groove. At this time, the shock absorber rod is in an inclined state and has elasticity. During landing, the shock absorber rod first contacts the ground. The impact force generated by the landing causes the shock absorber rod to bend and deform. Then the shock absorber rod releases its elasticity to offset the impact force generated by the landing, making the drone landing safer.

[0017] Thirdly: In this invention, when the shock absorber rod flips over from inside the push groove, it pushes the two stops to move towards the middle. At this time, the two stops will limit the shock absorber rod, so that when the shock absorber rod is impacted upon landing, it will not flip back into the interior of the movable shaft, thus preventing the shock absorption from failing.

[0018] Fourthly: In this invention, the electromagnet is attracted together with two fixed magnetic blocks, so that the baffle seals the inside of the storage slot. When the brushless motor has a problem, the monitoring mechanism will cut off the power to the electromagnet, so that the electromagnet loses its magnetism. The baffle will open under the force of the torsion spring shaft. At this time, the parachute can be opened from the inside of the storage slot, and the drone will land safely.

[0019] Fifthly, this invention is equipped with a warning light that emits a conspicuous light during flight, providing location information for the drone during nighttime flight. When the drone crashes at night, the light emitted by the warning light can help the drone be quickly located.

[0020] This solves the problems of existing drones having large wings that are difficult to store and wings that are prone to loosening during flight, leading to flight failure. Attached Figure Description

[0021] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the main structure provided in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the unfolded structure provided in one embodiment of the present invention;

[0024] Figure 3This is a partial structural cross-sectional view provided in one embodiment of the present invention;

[0025] Figure 4 This is provided in one embodiment of the present invention. Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is provided in one embodiment of the present invention. Figure 3 Enlarged view at point B in the middle;

[0027] Figure 6 This is provided in one embodiment of the present invention. Figure 3 Enlarged view at point C;

[0028] Figure 7 This is a schematic diagram of the installation of the shock absorber rod provided in one embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Body; 2. Movable shaft; 3. Arm; 4. Brushless motor; 5. Rotating shaft; 6. Propeller; 7. Camera; 8. Mounting base; 9. Mounting groove; 10. Movable groove; 11. First limit block; 12. First drive shaft; 13. Knob; 14. Drive rod; 15. Drive bevel gear; 16. Adjusting block; 17. Second drive shaft; 18. Second limit block; 19. Limiting groove; 20. Tilting groove; 21. Mounting shaft; 22. Shock absorber rod; 23. Push groove; 24. Stop block; 25. Slide groove; 26. Slider; 27. Connecting magnetic block; 28. Storage groove; 29. ​​Baffle; 30. Horizontal bar; 31. Electromagnet; 32. Fixing magnetic block; 33. Warning light. Detailed Implementation

[0031] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This invention provides an improved foldable-wing drone. The technical solution of this invention is as follows:

[0033] like Figure 1 as well as Figure 5As shown, a foldable-wing drone includes a fuselage 1. Two movable shafts 2 are movably mounted on the top rear side and bottom front side of the fuselage 1. The movable shafts 2 are cylindrical structures. Arms 3 are fixedly sleeved on the movable shafts 2. Arms 3 are rectangular strips. A brushless motor 4 is fixedly mounted on the end of the arm 3 away from the fuselage 1. A rotating shaft 5 is fixedly mounted on the output end of the brushless motor 4. Four propellers 6 are movably mounted on the rotating shaft 5. After the arm 3 is unfolded on the fuselage 1, the brushless motor 4 is started. The brushless motor 4 drives the propellers 6 to rotate through the rotating shaft 5 to achieve flight. A camera 7 is movably mounted on the bottom of the fuselage 1. The camera 7 can take pictures during flight. A fixing mechanism is provided on the fuselage 1.

[0034] like Figure 3 as well as Figure 4As shown, the fixing mechanism includes a fixed base 8, a fixed groove 9, a movable groove 10, a first limiting block 11, a first transmission shaft 12, a knob 13, a transmission rod 14, and a transmission bevel gear 15. There are two fixed bases 8, two fixed grooves 9, two movable grooves 10, two first limiting blocks 11, and two first transmission shafts 12. The fixed base 8 is a cylindrical structure and is fixedly installed on one end of the two rear arms 3 near the body 1. The fixed groove 9 is an "L"-shaped groove, formed on the top wall of the fixed base 8, and extends through the side wall of the fixed base 8. The movable groove 10 is a rectangular groove. Located on the left and right sides of the top wall of the fuselage 1, corresponding to the fixed seats 8, the first limiting block 11 is a rectangular block movably installed inside the movable slot 10. The first drive shaft 12 is a threaded cylindrical structure, and two first drive shafts 12 are respectively movably installed inside the two movable slots 10, with the first drive shaft 12 passing through the side wall of the first limiting block 11 and threadedly connected to the first limiting block 11. The knob 13 is a cylindrical structure, and the transmission rod 14 is embedded and movably installed on the top wall of the fuselage 1, corresponding to the positions of the two first drive shafts 12. The knob 13 is fixedly installed on the transmission rod 14. On the top wall, there are three transmission bevel teeth 15. These three bevel teeth 15 are respectively fixedly sleeved on the bottom of the transmission rod 14 and one end of the two first transmission shafts 12 near the transmission rod 14. The transmission bevel teeth 15 on the transmission rod 14 mesh with the transmission bevel teeth 15 on the two first transmission shafts 12. In the retracted state, one end of the first limiting block 11 is located inside the fixing groove 9. At this time, the fixing seat 8 is fixed by the first limiting block 11, and the arm 3 is also fixed and cannot be flipped to the sides. When flight is required, rotating the knob 13 causes the transmission rod 14 and transmission bevel teeth 15 to rotate. The transmission bevel gear 15 meshes with the transmission bevel gear 15 on the first transmission shaft 12, thereby driving the two first transmission shafts 12 to rotate. The first transmission shaft 12 is threadedly connected to the first limiting block 11. The rotation of the first transmission shaft 12 causes the first limiting block 11 to move inside the movable groove 10, causing the first limiting block 11 to leave the inside of the fixed groove 9. At this time, the arm 3 can be flipped to the flight state. Then, the knob 13 is rotated in the opposite direction again, and the knob 13 drives the first transmission shaft 12 to rotate again. The first limiting block 11 moves to the other end of the fixed groove 9 again, and the arm 3 can be fixed again.

[0035] like Figure 5As shown, in one embodiment, the fixing mechanism further includes two adjusting blocks 16, a second drive shaft 17, a second limiting block 18, and a limiting groove 19. The adjusting blocks 16 are cylindrical structures, and the two adjusting blocks 16 are respectively embedded in the left and right sides of the front of the top wall of the machine body 1. The top of each adjusting block 16 is provided with a rectangular groove, which facilitates the rotation of the adjusting block 16. The second drive shaft 17 is a threaded cylindrical structure and is fixedly installed on the bottom wall of the adjusting blocks 16. The second limiting block 18 is a rectangular block and is movably installed inside the machine body 1 at a position corresponding to the second drive shaft 17. The second drive shaft 17 and the second limiting groove 19 are connected. The two limiting blocks 18 are threaded together, and the limiting groove 19 is opened on the top wall of the two movable shafts 2 located on the front side. In the retracted state, the second limiting block 18 is located inside the limiting groove 19, so that the arm 3 is fixed and cannot be unfolded. When flight is required, the adjusting block 16 is rotated, and the adjusting block 16 drives the second transmission shaft 17 to rotate. The second transmission shaft 17 is threadedly connected to the second limiting block 18, and the second limiting block 18 will leave the inside of the limiting groove 19. At this time, the arm 3 can be flipped and unfolded. After unfolding, the adjusting block 16 is rotated again, so that the second limiting block 18 returns to the inside of the limiting groove 19 to fix the arm 3, so that the arm 3 will not loosen during flight.

[0036] like Figure 7 As shown, in one embodiment, the bottom walls of the four arms 3 are provided with flip grooves 20. Inside the flip grooves 20, near the end of the brushless motor 4, a mounting shaft 21 is movably installed. The mounting shaft 21 is a cylindrical structure, and a shock-absorbing rod 22 is fixedly sleeved on the mounting shaft 21. The shock-absorbing rod 22 is a long strip with a rectangular structure and is elastic. The length of the shock-absorbing rod 22 on the two rear arms 3 is greater than that on the two front arms 3. During landing, the shock-absorbing rod 22 can be flipped out of the flip grooves 20. At this time, the shock-absorbing rod 22 is in an inclined state and is elastic. During landing, the shock-absorbing rod 22 first contacts the ground. The impact force generated by the landing causes the shock-absorbing rod 22 to bend and deform. Then, the shock-absorbing rod 22 releases its elastic force to offset the impact force generated by the landing, making the landing of the drone safer.

[0037] Two push grooves 23 are provided on the arm 3 corresponding to the position of the shock absorber 22. The push grooves 23 are rectangular grooves. A stop block 24 is movably installed inside the push grooves 23. The stop block 24 is a rectangular block. A sliding groove 25 is provided inside the arm 3 corresponding to the position of the stop block 24. The sliding groove 25 is a rectangular groove. A slider 26 is movably installed inside the sliding groove 25. The slider 26 is fixedly connected to the stop block 24. When the shock absorber 22 flips out of the push groove 23, it pushes the two stop blocks 24 to move towards the middle. At this time, the two stop blocks 24 will limit the shock absorber 22, so that when the shock absorber 22 is impacted upon landing, it will not flip back into the mounting shaft 21 and cause the shock absorption to fail.

[0038] Both blocks 24 have a connecting magnetic block 27 embedded inside. The adjacent poles of the connecting magnetic blocks 27 on the two blocks 24 are opposite poles. After the two blocks 24 move relative to each other, the two connecting magnetic blocks 27 will attract each other under the action of magnetic force, thereby fixing the two blocks 24 and preventing the blocks 24 from easily returning to the inside of the push groove 23.

[0039] like Figure 1 and Figure 6 As shown, in one embodiment, a storage slot 28 is provided on the top wall of the fuselage 1. The storage slot 28 is a rectangular slot. Baffles 29 are movably installed on both the front and rear sides of the storage slot 28 through torsion spring shafts. The baffles 29 are rectangular plates. A parachute and a monitoring device are installed inside the storage slot 28. The monitoring device is electrically connected to the parachute and the four brushless motors 4. When the four brushless motors 4 malfunction and cannot continue to fly, the monitoring device will activate the parachute, so that the drone can safely land on the ground, avoiding the situation where the drone crashes and is damaged when there is a problem.

[0040] Inside the storage slot 28, a horizontal bar 30 is fixedly installed. The bar 30 is a rectangular plate, and an electromagnet 31 is embedded in the bar 30. The electromagnet 31 is electrically connected to the monitoring device. Fixed magnets 32 are embedded in the bottom wall of the two baffles 29. The poles of the fixed magnets 32 and the electromagnets 31 are opposite poles. Under normal circumstances, the electromagnets 31 and the two fixed magnets 32 are attracted together, so that the baffles 29 seal the inside of the storage slot 28. When the brushless motor 4 malfunctions, the monitoring mechanism will cut off the power to the electromagnets 31, causing the electromagnets 31 to lose their magnetism. The baffles 29 will then open under the force of the torsion spring shaft. At this time, the parachute can be opened from inside the storage slot 28, allowing the drone to land safely.

[0041] like Figure 1 , Figure 2 or Figure 3As shown, in one embodiment, two warning lights 33 are fixedly installed on the top of the fuselage 1. The warning lights 33 can emit bright light during flight, provide positioning for the drone during night flight, and when the drone crashes at night, the light emitted by the warning lights 33 can make the drone quickly found.

[0042] The specific working method is as follows:

[0043] With a fixing mechanism, when not in flight, the four arms 3 are respectively fixed by the first limiting block 11 and the second limiting block 18. Rotating the knob 13 causes the transmission rod 14 and the transmission bevel gear 15 to rotate. The transmission bevel gear 15 on the transmission rod 14 meshes with the transmission bevel gear 15 on the first transmission shaft 12, thereby driving the two first transmission shafts 12 to rotate. The first transmission shafts 12 are threadedly connected to the first limiting blocks 11. The rotation of the first transmission shafts 12 causes the first limiting blocks 11 to move inside the movable groove 10, so that the first limiting blocks 11... 1. Leave or return to the inside of the fixed slot 9, rotate the adjusting block 16, the adjusting block 16 drives the second drive shaft 17 to rotate, the second drive shaft 17 is threadedly connected to the second limit block 18, the second limit block 18 will leave or move to the inside of the limit slot 19. When flight is required, the arm 3 can be unlocked by the knob 13 and the adjusting block 16 respectively. After the arm 3 is fully extended, the arm 3 can be fixed again by the knob 13 and the adjusting block 16, which is convenient for storing the drone and will not cause flight problems due to the arm 3 being loose.

[0044] The technical means disclosed in this invention are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this invention are common knowledge to those skilled in the art.

Claims

1. A foldable-wing unmanned aerial vehicle (UAV), comprising a fuselage (1), characterized in that: Two movable shafts (2) are movably installed on the top rear side and bottom front side of the fuselage (1). An arm (3) is fixedly sleeved on the movable shaft (2). A brushless motor (4) is fixedly installed on the arm (3). A rotating shaft (5) is fixedly installed on the output end of the brushless motor (4). Four blades (6) are movably installed on the rotating shaft (5). A camera (7) is movably installed in the bottom of the fuselage (1). A fixing mechanism is provided on the fuselage (1). The fixing mechanism includes a fixed seat (8), a fixed groove (9), a movable groove (10), a first limiting block (11), a first transmission shaft (12), a knob (13), a transmission rod (14), and a transmission bevel gear (15). There are two fixed seats (8), two fixed grooves (9), two movable grooves (10), two first limiting blocks (11), and two first transmission shafts (12). The fixed seat (8) is fixedly installed on the two rear arms (3) at one end near the body (1). The fixed groove (9) is opened on the top wall of the fixed seat (8), the movable groove (10) is opened on the top wall of the body (1), and the first limiting block (11) is movably installed in the movable groove. Inside (10), two first drive shafts (12) are movably installed inside two movable slots (10). The first drive shafts (12) are threadedly connected to the first limit block (11). The drive rod (14) is embedded and movably installed on the top wall of the body (1). The knob (13) is fixedly installed on the top wall of the drive rod (14). There are three drive bevel teeth (15). The three drive bevel teeth (15) are fixedly sleeved on the bottom of the drive rod (14) and the two first drive shafts (12). The drive bevel teeth (15) on the drive rod (14) mesh with the drive bevel teeth (15) on the two first drive shafts (12) respectively.

2. The foldable-wing drone according to claim 1, characterized in that: The fixing mechanism also includes two adjusting blocks (16), a second drive shaft (17), a second limiting block (18), and a limiting groove (19). The two adjusting blocks (16) are respectively embedded in the left and right sides of the front of the top wall of the body (1). The second drive shaft (17) is fixedly installed on the bottom wall of the adjusting block (16). The second limiting block (18) is movably installed inside the body (1) at the position corresponding to the second drive shaft (17). The second drive shaft (17) and the second limiting block (18) are threaded together. The limiting groove (19) is opened on the top wall of the two movable shafts (2) located on the front side.

3. The foldable-wing drone according to claim 1, characterized in that: The bottom wall of the four arms (3) is provided with a flipping groove (20). The interior of the flipping groove (20) is movably mounted with a mounting shaft (21) near the end of the brushless motor (4). A shock absorber (22) is fixedly sleeved on the mounting shaft (21). The shock absorber (22) is elastic. The length of the shock absorber (22) on the two rear arms (3) is greater than that on the two front arms (3).

4. A foldable-wing drone according to claim 3, characterized in that: Two push grooves (23) are provided on the arm (3) at the position corresponding to the shock absorber (22). A stop block (24) is movably installed inside the push groove (23). A sliding groove (25) is provided inside the arm (3) at the position corresponding to the stop block (24). A slider (26) is movably installed inside the sliding groove (25). The slider (26) is fixedly connected to the stop block (24). A connecting magnet (27) is movably installed inside both stops (24). The poles of the connecting magnets (27) on the two stops (24) are opposite poles.

5. A foldable-wing drone according to claim 1, characterized in that: The top wall of the fuselage (1) is provided with a storage slot (28). The front and rear sides of the storage slot (28) are equipped with baffles (29) through torsion spring shafts. The storage slot (28) contains a parachute and a monitoring device. The monitoring device is electrically connected to the parachute and four brushless motors (4).

6. A foldable-wing drone according to claim 5, characterized in that: The storage slot (28) has a horizontal bar (30) fixedly installed inside. An electromagnet (31) is inlaid on the horizontal bar (30). The electromagnet (31) is electrically connected to the monitoring device. Fixed magnetic blocks (32) are inlaid on the bottom wall of the two baffles (29). The poles of the fixed magnetic blocks (32) and the electromagnets (31) are opposite poles.

7. A foldable-wing drone according to claim 1, characterized in that: Two warning lights (33) are fixedly installed on the top of the fuselage (1).

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