Unmanned aerial vehicle automatic loading and unloading device for low-altitude logistics

Abstract

The invention discloses an unmanned aerial vehicle automatic loading and unloading device for low-altitude logistics, and belongs to the technical field of unmanned aerial vehicles. The hanging and taking mechanism further comprises a first mounting plate, the first mounting plate is fixedly mounted at the bottom of the unmanned aerial vehicle, the bottom of the first mounting plate is connected with a first box body, a hanging frame is mounted at the bottom of the first box body, a spring bolt mechanism is mounted at the bottom of the hanging frame, and a locking mechanism is further mounted in the first box body. The bottom of the locking mechanism is fixedly connected with the hanging frame. The unmanned aerial vehicle can automatically load and unload goods, the distribution time is shortened, and the distribution efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of unmanned aerial vehicle (UAV) technology, and specifically relates to an automated loading and unloading device for UAVs used in low-altitude logistics. Background Technology

[0002] With the rapid development of the low-altitude logistics industry, drones have been widely used in e-commerce parcels, community emergency supplies, fresh food and other scenarios due to their advantages of high flexibility and low cost of short-distance delivery. The degree of automation of their operation process has become the core bottleneck to improve delivery efficiency, and the level of automation in loading and unloading is particularly critical.

[0003] However, the current operation of low-altitude logistics drones still suffers from significant shortcomings in automation, especially in the loading and unloading process, which directly restricts overall delivery efficiency. Currently, the mainstream loading and unloading method still relies primarily on manual assistance. In practice, dedicated operators are required at each drone take-off and landing site. These operators must wait for the drone to land, manually open the cargo door, retrieve the delivered goods, and then place the goods to be delivered into the cargo hold one by one and secure them.

[0004] This model not only significantly increases labor and site operation costs, but more importantly, the long average time spent on manual loading and unloading greatly extends the delivery cycle of a single drone, making it difficult to increase the average daily delivery frequency per drone. Furthermore, in multi-site continuous delivery scenarios, the need to repeatedly allocate manpower and wait time at each site further reduces the overall efficiency of the delivery network, making it difficult to adapt to the operational needs of multi-site continuous delivery. Summary of the Invention

[0005] The purpose of this invention is to provide an automated loading and unloading device for drones used in low-altitude logistics, enabling drones to automatically load and unload goods, reduce delivery time, and improve delivery efficiency.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] An automated loading and unloading device for drones used in low-altitude logistics, including a hook-up mechanism and a triggering mechanism installed on the bottom of the drone;

[0008] The hanging mechanism further includes a first mounting plate, which is fixedly installed on the bottom of the drone. A first housing is connected to the bottom of the first mounting plate, and a hanging frame is installed on the bottom of the first housing. A locking tongue mechanism is installed on the bottom of the hanging frame, and a locking mechanism is also installed inside the first housing. The bottom of the locking mechanism is fixedly connected to the hanging frame.

[0009] Preferably, the locking mechanism further includes a limiting groove, which has a convex shape and is fixedly connected to the inner wall of the first housing. The inner wall of the first housing is also provided with a first sliding groove, in which a T-shaped strip is slidably connected. The top of the T-shaped strip is slidably connected to the limiting groove, and a first spring is connected between the top of the T-shaped strip and the top of the limiting groove. The upper two sides of the T-shaped strip are provided with toothed portions. Two first gears are also rotatably connected to the inner wall of the first housing. The toothed portions are located between the two first gears and mesh with both first gears simultaneously. The first gear on the left is also connected to the locking tongue mechanism.

[0010] Preferably, the locking tongue mechanism further includes a first push rod, which is slidably connected within the hanging frame. A first rack is connected to the top of the first push rod, and the first rack meshes with a first gear on the left side. A second rack is connected to the bottom of the first push rod. A gear shaft is rotatably connected within the hanging frame. The locking tongue mechanism also includes a first slider and a second slider, both of which are slidably connected within the hanging frame. A second spring connects the first slider and the second slider. A third rack is connected to the left end of the first slider. Both the second and third racks mesh with the gear shaft. A non-magnetic connecting block is hinged to the right end of the second slider. A bar magnet is connected to the right end of the non-magnetic connecting block. An electromagnet is installed on the bottom right side of the hanging frame.

[0011] Preferably, the locking tongue mechanism further includes a first push rod, which is slidably connected within the hanging frame. A first rack is connected to the top of the first push rod, and the first rack meshes with a first gear on the left side. A fourth rack is connected to the bottom of the first push rod. A second gear and a cam are rotatably connected within the hanging frame, and the second gear and the cam are coaxially connected. The locking tongue mechanism also includes a first slider and a second slider, both of which are slidably connected within the hanging frame. A second spring connects the first slider and the second slider. A top plate is connected to the left end of the first slider, and a non-magnetic connecting block is hinged to the right end of the second slider. A bar magnet is connected to the right end of the non-magnetic connecting block, and an electromagnet is installed on the bottom right side of the hanging frame.

[0012] Preferably, the triggering mechanism further includes a second mounting plate, which is fixedly mounted on the bottom of the drone. A second housing is mounted on the bottom of the second mounting plate, and a second sliding groove is mounted on the inner wall of the second housing. A second top rod is slidably connected in the second sliding groove. A third spring is installed between the top of the second top rod and the inner wall of the second housing. A slide rail is connected to the right side of the second sliding groove, and a sliding frame is slidably connected on the slide rail. A triangular protrusion is connected to the bottom of the sliding frame, and a left stop block and a right stop block are respectively connected to the left and right sides of the top of the sliding frame.

[0013] Preferably, a pivot box is connected to the front side of the second top rod, and a pivot is rotatably connected inside the pivot box. A first support rod and a second support rod are connected to the right end of the pivot, and the included angle between the first support rod and the second support rod is 120°. A third support rod is also connected to the right end of the pivot, and a support rod is connected to the third support rod. A fourth spring is connected to the support rod, and a conductive rod is connected to the top of the fourth spring. Two conductive posts are provided directly above the conductive rod, and the two conductive posts are connected to the inner wall of the second box. The two ends of the electromagnet's coil are respectively connected to the two conductive posts.

[0014] Preferably, a swing arm is connected to the left end of the rotating shaft, two limiting blocks are connected to the left side wall of the rotating shaft box, a hanging ring is connected to the bottom left side of the second slide groove, and a fifth spring is connected between the swing arm and the hanging ring. Rollers are rotatably connected to both the first and second support rods. A wire groove is connected between the first and second housings, and the coil of the electromagnet passes through the wire groove. An eight-shaped opening structure is connected to the bottom of the hanging frame.

[0015] The working principle of this invention is as follows:

[0016] During loading, the drone flies above the cargo box using an identification system, aligning the bottom of the hanging frame with the hook on top of the box, and then slowly descends. As the drone descends, the second push rod of the trigger mechanism lands on top of the cargo box, gradually compressing the third spring. Simultaneously, the second slide rail drives the slide rail and sliding frame to descend, causing the left stop block to push the first support rod to rotate counterclockwise. This, in turn, drives the rotating shaft, the third support rod, and the swing rod to rotate. During the swing rod's rotation, the fifth spring is first stretched by the swing rod. When the swing rod rotates more than 90°, the fifth spring contracts due to its elasticity, pulling the swing rod to continue rotating until the limit block stops the swing rod. At this point, the rotating shaft, the third support rod, and the swing rod have all rotated 180°, causing the third support rod and the conductive rod to face downwards. As the drone continues to descend, the hook on top of the cargo box pushes the bar magnet upwards, causing the bar magnet to rotate upwards until it disengages from the hook on top of the cargo box. Then, the bar magnet rotates downwards to reset, at which point the upper part of the hook is fitted inside the hanging frame. The drone then begins to ascend. The third spring gradually returns to its original position under its elastic force, causing the second slide rail and sliding frame to rise. The right side wall of the triangular protrusion adheres to the first support rod at the bottom. Under the obstruction of the first support rod, the triangular protrusion slides to the left, moving the right stop above the second support rod. As the drone continues to ascend, the bar magnet lifts the hook on top of the cargo box, locking it in the hanging frame.

[0017] The weight of the cargo causes the hanging frame and T-bar to move downwards, stretching the first spring. As the T-bar descends, it drives the first gear to rotate. The first gear on the left, through the locking tongue mechanism, causes the first slider to compress the second spring. The elastic force of the second spring causes the second slider, the non-magnetic connecting block, and the bar magnet to experience a rightward pushing force, thus stably inserting the bar magnet into the hole on the bottom right side of the hanging frame. The greater the weight of the cargo, the greater the rightward pushing force on the bar magnet, thereby achieving the function of automatically adjusting the locking force.

[0018] During unloading, the drone descends slowly upon reaching the unloading location, and the cargo box lands smoothly. As the drone descends, the second push rod of the trigger mechanism presses against the top of the cargo box, and the third spring is gradually compressed. Simultaneously, the second slide rail drives the slide rail and sliding frame to descend, causing the right stop block to push the second support rod at the top to rotate clockwise. This, in turn, drives the rotating shaft, the third support rod, and the swing rod to rotate. During the rotation of the swing rod, the fifth spring is first stretched by the swing rod. When the swing rod rotates more than 90°, the fifth spring contracts due to its elasticity, pulling the swing rod to continue rotating until the limit block stops the swing rod. At this point, the rotating shaft, the third support rod, and the swing rod all rotate 180° in the opposite direction, causing the third support rod and the conductive rod to face upwards. As the drone continues to descend, the conductive rod comes into contact with the conductive column, the fourth spring is compressed, and the electromagnet is energized. This causes the electromagnet to generate a repulsive force with the bar magnet. This repulsive force pushes the bar magnet to the left and retracts it into the hanging frame, thus disengaging the hook on the top of the cargo box from the hanging frame. The drone then begins to ascend. Due to the action of the fourth spring, the conductive rod and conductive post do not immediately detach, thus preventing the bar magnet from immediately resetting. As the drone continues to ascend, the third spring gradually resets under the action of elastic force. The second slide rail drives the slide rail and sliding frame to rise. The left side wall of the triangular protrusion adheres to the second support rod located at the bottom. Under the obstruction of the second support rod, the triangular protrusion slides to the right, causing the left stop block to move above the first support rod. This completes the unloading process, and the drone awaits the next work cycle.

[0019] The main advantages of this invention are:

[0020] 1. The device automatically engages and locks the hooks during loading via a trigger mechanism. During unloading, the contact between the conductive rod and the conductive column triggers the electromagnet to repel the hooks, thus automatically disengaging them. The entire process requires no manual assistance, enabling fully automated operation, effectively reducing labor costs and improving delivery efficiency.

[0021] 2. The hook-and-hold mechanism utilizes the weight of the cargo to drive the T-shaped bar downwards during loading. The force is transmitted to the bar magnet through a gear rack or cam structure, so that the locking force increases with the weight of the cargo, ensuring that both light and heavy cargo can be stably fixed, thus improving safety during transportation. Attached Figure Description

[0022] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0023] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention and the drone in its installed state;

[0024] Figure 2 This is a front view of an embodiment of the present invention and the drone in its installed state;

[0025] Figure 3 This is a right view of an embodiment of the present invention and the drone in its installed state;

[0026] Figure 4 This is a three-dimensional structural diagram of the hooking mechanism in an embodiment of the present invention. Figure 1 ;

[0027] Figure 5 This is a three-dimensional structural diagram of the hook-and-lift mechanism (with the first housing removed) in an embodiment of the present invention. Figure 2 ;

[0028] Figure 6 This is a partial cross-sectional view of the hook-up mechanism in an embodiment of the present invention. Figure 1 ;

[0029] Figure 7 for Figure 6 A magnified schematic diagram of the partial structure at point A in the middle;

[0030] Figure 8 This is a partial cross-sectional view of the hook-up mechanism in an embodiment of the present invention. Figure 2 ;

[0031] Figure 9 for Figure 8 A magnified schematic diagram of the local structure at point B;

[0032] Figure 10 This is a partial structural diagram of the hooking mechanism in an embodiment of the present invention;

[0033] Figure 11 This is a three-dimensional structural diagram of the triggering mechanism in an embodiment of the present invention. Figure 1 ;

[0034] Figure 12 This is a three-dimensional structural diagram of the triggering mechanism (with the second housing removed) in an embodiment of the present invention. Figure 2 ;

[0035] Figure 13 This is a three-dimensional structural diagram of the triggering mechanism (with the second housing removed) in an embodiment of the present invention. Figure 3 ;

[0036] Figure 14 This is a three-dimensional structural diagram of the triggering mechanism (with the second housing removed) in an embodiment of the present invention. Figure 4 ;

[0037] Figure 15 for Figure 14 A magnified schematic diagram of the structure at point C in the middle;

[0038] The symbols for the main components are explained below:

[0039] 1. Drone; 2. Hanging mechanism; 3. First mounting plate; 4. First housing; 5. Hanging frame; 6. Locking tongue mechanism; 7. First push rod; 8. First rack; 9. Second rack; 10. Gear shaft; 11. First slider; 12. Second slider; 23. Second spring; 24. Third rack; 248. Non-magnetic connecting block; 249. Bar magnet; 2410. Electromagnet; 2411. Fourth rack; 2412. Second gear; 2413. Cam; 2414. Top plate; 2415. Figure-eight opening structure; 2416. Triggering mechanism; 3. Second mounting plate; 31. Second housing; 32. Second... 33. Slide groove, 34. Second top rod, 35. Third spring, 36. Slide rail, 37. Sliding frame, 38. Triangular protrusion, 39. Left stop block, 310. Right stop block, 311. Rotary shaft box, 312. First support rod, 313. Second support rod, 314. Roller, 315. Third support rod, 316. Support rod, 317. Fourth spring, 318. Conductive rod, 319. Conductive column, 320. Wire groove, 321. Swing rod, 322. Limiting block, 323. Hanging ring, 324. Fifth spring, 325. Limiting groove, 41. First slide groove, 42. T-shaped strip, 43. First spring, 44. Toothed part, 45. First gear, 46. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] like Figures 1 to 15 As shown, the automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) of the present invention includes a hooking mechanism 2 and a triggering mechanism 3, both of which are installed on the bottom of the UAV 1. The UAV 1 is a prior art device. The hooking mechanism 2 is used to hook up goods, and the triggering mechanism 3 is used to switch between loading and unloading states. This device can be used for small-parcel delivery in community e-commerce, short-distance delivery of fresh / cold chain goods, and rapid delivery of emergency supplies. After the goods are delivered to the express delivery station, the station can collect and reuse the cargo boxes. The cargo boxes are uniformly configured by the express delivery company and come in different standard sizes. A circular, elliptical, or other shaped ring hook is fixedly installed on the top of the cargo box.

[0042] To facilitate the hooking and unhooking, the hooking and unhooking mechanism 2 includes a first mounting plate 21, which is fixedly installed on the bottom of the drone 1. The bottom of the first mounting plate 21 is connected to a first housing 22, and a hanging frame 23 is installed on the bottom of the first housing 22. A locking tongue mechanism 24 is installed on the bottom of the hanging frame 23. A locking mechanism is also installed inside the first housing 22, and the bottom of the locking mechanism is fixedly connected to the hanging frame 23.

[0043] The locking mechanism includes a limiting groove 41, which has a convex shape and is fixedly connected to the inner wall of the first housing 22. The inner wall of the first housing 22 also has a first sliding groove 42, in which a T-shaped strip 43 is slidably connected. The top of the T-shaped strip 43 is slidably connected to the limiting groove 41, thus limiting the T-shaped strip 43 and preventing excessive displacement of the hanging frame 23. A first spring 44 connects the top of the T-shaped strip 43 to the top of the limiting groove 41. Toothed portions 45 are provided on both sides of the upper part of the T-shaped strip 43. Two first gears 46 are rotatably connected to the inner wall of the first housing 22, with the toothed portions 45 located between and meshing with both gears 46 simultaneously. The left first gear 46 is also connected to the locking tongue mechanism 24.

[0044] The triggering mechanism 3 includes a second mounting plate 31, which is fixedly mounted on the bottom of the drone 1. A second housing 32 is mounted on the bottom of the second mounting plate 31. A second slide groove 33 is mounted on the inner wall of the second housing 32. A second push rod 34 is slidably connected in the second slide groove 33. A third spring 35 is installed between the top of the second push rod 34 and the inner wall of the second housing 32. A slide rail 36 is connected to the right side of the second slide groove 33. A sliding frame 37 is slidably connected on the slide rail 36. A triangular protrusion 38 is connected to the bottom of the sliding frame 37. A left stop block 39 and a right stop block 310 are respectively connected to the left and right sides of the top of the sliding frame 37. The front of the second top rod 34 is connected to a pivot box 311. A pivot 312 is rotatably connected inside the pivot box 311. The right end of the pivot 312 is connected to a first support rod 313 and a second support rod 314. The included angle between the first support rod 313 and the second support rod 314 is 120°. Rollers 315 are rotatably connected to both the first support rod 313 and the second support rod 314. The rollers 315 facilitate the movement of the first support rod 313 and the second support rod 314 on the triangular protrusion 38. The right end of the pivot 312 is also connected to a third support rod 316. A support rod 317 is connected to the third support rod 316. A fourth spring 318 is connected to the support rod 317. A conductive rod 319 is connected to the top of the fourth spring 318. Two conductive posts 320 are provided directly above the conductive rod 319. The two conductive posts 320 are connected to the inner wall of the second housing 32. The two ends of the coil of the electromagnet 2411 are connected to the two conductive posts 320 respectively. The DC power required by the electromagnet 2411 is provided by the power supply of the drone. A wire groove 321 is connected between the first housing 22 and the second housing 32, and the coil of the electromagnet 2411 is threaded through the wire groove 321. A swing rod 322 is connected to the left end of the rotating shaft 312. Two limit blocks 323 are connected to the left side wall of the rotating shaft housing 311. A hanging ring 324 is connected to the bottom left side of the second slide 33. A fifth spring 325 is connected between the swing rod 322 and the hanging ring 324.

[0045] During loading, the drone 1 flies over the cargo box using an automatic identification system (existing technology), aligns the bottom of the hanging frame 23 with the hook on the top of the cargo box, and then slowly descends. To facilitate the hook entering the hanging frame 23, the bottom of the hanging frame 23 is connected to a figure-eight opening structure 2416. As the drone 1 descends, the second push rod 34 of the trigger mechanism 3 lands on the top of the cargo box, and the third spring 35 is gradually compressed. At the same time, the second slide rail 33 drives the slide rail 36 and the sliding frame 37 to descend, causing the left stop block 39 to push the first support rod 313 to rotate counterclockwise, thereby driving the rotating shaft 312, the third support rod 316 and the swing rod 322 to rotate. During the rotation of the swing rod 322, the fifth spring 325 is first stretched by the swing rod 322. When the swing rod 322 rotates more than 90°, the fifth spring 325 will pull the swing rod 322 to continue rotating due to the elasticity of the contraction, until the limit block 323 blocks the swing rod 322. At this time, the rotating shaft 312, the third support rod 316 and the swing rod 322 have all rotated 180°, so that the third support rod and the conductive rod 319 face downward. As the drone 1 continues to descend, the hook on top of the cargo box pushes the bar magnet 2410 upward, causing it to rotate upward until the hook disengages. The bar magnet then rotates downward to reset, at which point the upper part of the hook is secured within the hanging frame 23. Next, the drone 1 begins to ascend. The third spring 35 gradually resets under its elastic force, and the second slide rail 33 drives the slide rail 36 and sliding frame 37 upward. The right side wall of the triangular protrusion 38 adheres to the first support rod 313 at the bottom. Under the obstruction of the first support rod 313, the triangular protrusion 38 slides to the left, causing the right stop block 310 to move above the second support rod 314. As the drone 1 continues to ascend, the bar magnet 2410 lifts the hook on top of the cargo box, locking it within the hanging frame 23.

[0046] In this embodiment, for automatic adjustment of the locking force, as a preferred solution, the locking tongue mechanism 24 further includes a first push rod 241, which is slidably connected within the hanging frame 23. A first rack 242 is connected to the top of the first push rod 241, and the first rack 242 meshes with a first gear 46 on the left side. A second rack 243 is connected to the bottom of the first push rod 241. A gear shaft 244 is rotatably connected within the hanging frame 23. The locking tongue mechanism 24 also includes a first slider 245 and a second slider 246. The first slider 245 and the second slider 246 are both slidably connected inside the hanging frame 23. A second spring 247 is connected between the first slider 245 and the second slider 246. A third rack 248 is connected to the left end of the first slider 245. The second rack 243 and the third rack 248 are both meshed with the gear shaft 244. A non-magnetic connecting block 249 is hinged to the right end of the second slider 246. A bar magnet 2410 is connected to the right end of the non-magnetic connecting block 249. An electromagnet 2411 is installed on the bottom right side of the hanging frame 23.

[0047] During operation, the weight of the goods causes the hanging frame 23 and T-shaped bar 43 to move downwards, stretching the first spring 44. As the T-shaped bar 43 descends, it drives the first gear 46 to rotate. The first gear 46 on the left then drives the first rack 242, the first push rod 241, and the second rack 243 to rise. The second rack 243 then drives the third rack 248 and the first slider 245 to move to the right via the gear shaft 244. The first slider 245 compresses the second spring 247. The elastic force of the second spring 247 causes the second slider 246, the non-magnetic connecting block 249, and the bar magnet 2410 to receive a rightward pushing force, thus allowing the bar magnet 2410 to be stably inserted into the hole on the bottom right side of the hanging frame 23. The greater the weight of the goods, the greater the rightward pushing force on the bar magnet 2410, thereby achieving the function of automatically adjusting the locking force.

[0048] As another preferred embodiment, the locking tongue mechanism 24 further includes a first push rod 241, which is slidably connected within the hanging frame 23. A first rack 242 is connected to the top of the first push rod 241, and the first rack 242 meshes with a first gear 46 on the left side. A fourth rack 2412 is connected to the bottom of the first push rod 241. A second gear 2413 and a cam 2414 are rotatably connected within the hanging frame 23, and the second gear 2413 and the cam 2414 are coaxially connected. The locking tongue mechanism 24 also includes a first slider 245 and a second slider 246, both of which are slidably connected within the hanging frame 23. A second spring 247 is connected between the first slider 245 and the second slider 246. A top plate 2415 is connected to the left end of the first slider 245, and a non-magnetic connecting block 249 is hinged to the right end of the second slider 246. A bar magnet 2410 is connected to the right end of the non-magnetic connecting block 249, and an electromagnet 2411 is installed on the bottom right side of the hanging frame 23.

[0049] During operation, the weight of the goods causes the hanging frame 23 and T-shaped bar 43 to move downwards, stretching the first spring 44. The limiting groove 41 can limit the T-shaped bar 43, thus preventing excessive displacement of the hanging frame 23. As the T-shaped bar 43 descends, it drives the first gear 46 to rotate. The first gear 46 on the left then drives the first rack 242, the first push rod 241, and the fourth rack 2412 to rise. The fourth rack 2412 then drives the cam 2414 to rotate to the right through the second gear 2413. The cam 2414 pushes the top plate 2415 and the first slider 245 to move to the right. The first slider 245 compresses the second spring 247. The elastic force of the second spring 247 causes the second slider 246, the non-magnetic connecting block 249, and the bar magnet 2410 to be pushed to the right, thus allowing the bar magnet 2410 to be stably inserted into the hole on the right side of the bottom of the hanging frame 23. The greater the weight of the goods, the greater the rightward pushing force on the bar magnet 2410, thereby achieving the function of automatically adjusting the locking force.

[0050] During unloading, the drone 1 descends slowly after arriving at the unloading location, and the cargo box lands smoothly. As the drone 1 continues to descend, the second push rod 34 of the trigger mechanism 3 presses against the top of the cargo box, and the third spring 35 is gradually compressed. At the same time, the second slide rail 33 drives the slide rail 36 and the sliding frame 37 to descend, causing the right stop block 310 to push the second support rod 314 located at the top to rotate clockwise, thereby driving the rotating shaft 312, the third support rod 316 and the swing rod 322 to rotate. During the rotation of the swing rod 322, the fifth spring 325 is first stretched by the swing rod 322. When the swing rod 322 rotates more than 90°, the fifth spring 325 will pull the swing rod 322 to continue rotating due to the elasticity of the contraction, until the limit block 323 blocks the swing rod 322. At this time, the rotating shaft 312, the third support rod 316 and the swing rod 322 all rotate 180° in the opposite direction, so that the third support rod and the conductive rod 319 face upward. As the drone 1 continues to descend, the conductive rod 319 and conductive post 320 come into contact, compressing the fourth spring 318 and energizing the electromagnet 2411. This causes the electromagnet 2411 to repel the bar magnet 2410, pushing it to the left and retracting it into the hanging frame 23, thus detaching the hook on the top of the cargo box from the hanging frame 23. The drone 1 then begins to ascend. Due to the action of the fourth spring 318, the conductive rod 319 and conductive post 320 do not immediately detach, preventing the bar magnet 2410 from immediately resetting. As the drone 1 continues to ascend, the third spring 35 gradually resets under its elastic force. The second slide rail 33 drives the slide rail 36 and sliding frame 37 to rise. The left side wall of the triangular protrusion 38 adheres to the second support rod 314 at the bottom. Under the obstruction of the second support rod 314, the triangular protrusion 38 slides to the right, causing the left stop block 39 to move above the first support rod 313, thus completing the unloading process and awaiting the next work cycle.

[0051] The above provides a detailed description of the automated loading and unloading device for low-altitude logistics provided by this invention. The specific embodiments are described only to aid in understanding the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. An automated loading and unloading device for drones used in low-altitude logistics, characterized in that: Includes a hook-up mechanism (2) and a triggering mechanism (3) installed at the bottom of the drone (1); The hanging mechanism (2) includes a first mounting plate (21), which is fixedly installed on the bottom of the drone (1). The bottom of the first mounting plate (21) is connected to a first housing (22), and a hanging frame (23) is installed on the bottom of the first housing (22). A locking tongue mechanism (24) is installed on the bottom of the hanging frame (23). A locking mechanism is also installed inside the first housing (22), and the bottom of the locking mechanism is fixedly connected to the hanging frame (23).

2. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to claim 1, characterized in that: The locking mechanism includes a limiting groove (41), which is fixedly connected to the inner wall of the first housing (22). The inner wall of the first housing (22) is also provided with a first sliding groove (42). A T-shaped strip (43) is slidably connected in the first sliding groove (42). The top of the T-shaped strip (43) is slidably connected in the limiting groove (41). A first spring (44) is connected between the top of the T-shaped strip (43) and the top of the limiting groove (41). Toothed portions (45) are provided on both sides of the upper part of the T-shaped strip (43). Two first gears (46) are rotatably connected to the inner wall of the first housing (22). The toothed portions (45) are located between the two first gears (46) and mesh with the two first gears (46) at the same time. The first gear (46) on the left side is also connected to the locking tongue mechanism (24).

3. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to claim 2, characterized in that: The locking tongue mechanism (24) further includes a first push rod (241), which is slidably connected to the hanging frame (23). A first rack (242) is connected to the top of the first push rod (241), and the first rack (242) meshes with a first gear (46) on the left side. A second rack (243) is connected to the bottom of the first push rod (241). A gear shaft (244) is rotatably connected inside the hanging frame (23). The locking tongue mechanism (24) also includes a first slider (245) and a second slider (246). All blocks (246) are slidably connected within the hanging frame (23). A second spring (247) is connected between the first slider (245) and the second slider (246). A third rack (248) is connected to the left end of the first slider (245). The second rack (243) and the third rack (248) are both meshed with the gear shaft (244). A non-magnetic connecting block (249) is hinged to the right end of the second slider (246). A bar magnet (2410) is connected to the right end of the non-magnetic connecting block (249). An electromagnet (2411) is installed on the bottom right side of the hanging frame (23).

4. The automatic loading and unloading device for unmanned aerial vehicles (UAVs) for low-altitude logistics according to claim 2, characterized in that: The locking tongue mechanism (24) further includes a first push rod (241), which is slidably connected within the hanging frame (23). A first rack (242) is connected to the top of the first push rod (241), and the first rack (242) meshes with a first gear (46) on the left side. A fourth rack (2412) is connected to the bottom of the first push rod (241). A second gear (2413) and a cam (2414) are rotatably connected within the hanging frame (23). The second gear (2413) and the cam (2414) are coaxially connected. The locking tongue mechanism (24) also... The device includes a first slider (245) and a second slider (246), both of which are slidably connected within the hanging frame (23). A second spring (247) connects the first slider (245) and the second slider (246). A top plate (2415) is connected to the left end of the first slider (245), and a non-magnetic connecting block (249) is hinged to the right end of the second slider (246). A bar magnet (2410) is connected to the right end of the non-magnetic connecting block (249), and an electromagnet (2411) is installed on the bottom right side of the hanging frame (23).

5. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to claim 4, characterized in that: The triggering mechanism (3) includes a second mounting plate (31), which is fixedly mounted on the bottom of the drone (1). A second housing (32) is mounted on the bottom of the second mounting plate (31). A second slide groove (33) is mounted on the inner wall of the second housing (32). A second top rod (34) is slidably connected in the second slide groove (33). A third spring (35) is installed between the top of the second top rod (34) and the inner wall of the second housing (32). A slide rail (36) is connected to the right side of the second slide groove (33). A sliding frame (37) is slidably connected on the slide rail (36). A triangular protrusion (38) is connected to the bottom of the sliding frame (37). A left stop block (39) and a right stop block (310) are connected to the top left and right sides of the sliding frame (37), respectively.

6. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to claim 5, characterized in that: The front side of the second top rod (34) is connected to a pivot box (311), and a pivot (312) is rotatably connected inside the pivot box (311). The right end of the pivot (312) is connected to a first support rod (313) and a second support rod (314). The included angle between the first support rod (313) and the second support rod (314) is 120°. The right end of the pivot (312) is also connected to a third support rod (316). A support rod (317) is connected to the third support rod (316). A fourth spring (318) is connected to the support rod (317). A conductive rod (319) is connected to the top of the fourth spring (318). Two conductive posts (320) are provided directly above the conductive rod (319). The two conductive posts (320) are connected to the inner wall of the second box (32). The two ends of the coil of the electromagnet (2411) are respectively connected to the two conductive posts (320).

7. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to claim 1, characterized in that: The left end of the rotating shaft (312) is connected to a swing rod (322), and two limit blocks (323) are connected to the left side wall of the rotating shaft box (311). A hanging ring (324) is connected to the bottom left side of the second slide groove (33), and a fifth spring (325) is connected between the swing rod (322) and the hanging ring (324).

8. The automatic loading and unloading device for unmanned aerial vehicles (UAVs) for low-altitude logistics according to claim 6, characterized in that: Rollers (315) are rotatably connected to both the first support rod (313) and the second support rod (314).

9. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to claim 1, characterized in that: A wire groove (321) is connected between the first box (22) and the second box (32), and the coil of the electromagnet (2411) is inserted in the wire groove (321).

10. The automatic loading and unloading device for low-altitude logistics using unmanned aerial vehicles (UAVs) according to any one of claims 1-9, characterized in that: The bottom of the hanging frame (23) is connected to an eight-shaped opening structure (2416).

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