Rescue drone

Abstract

The present invention discloses a rescue drone, comprising a protective net and a grid frame, wherein the grid frame comprises a plurality of circumferentially distributed fixed parts, adjacent fixed parts are connected by folding structures, the protective net is arranged at the bottom of the grid frame formed by the fixed parts and the folding structures, and the grid frame is expanded or contracted by the telescopic action of each folding structure, a fixed part at the middle position of one side of the grid frame is provided with an entrance and exit communicating with the inside of the grid frame, and a retractable rescue ladder is arranged at the entrance and exit, and retractable propeller structures are arranged on the fixed parts on the opposite sides of the grid frame. The whole machine of the present invention is retractable, which reduces the occupied space and is convenient for transportation and storage.

Description

Technical Field

[0001] The invention relates to the technical field of aerial rescue, in particular to a rescue drone. Background Art

[0002] High-altitude rescue is difficult and dangerous, so high-altitude rescue has always been a social problem that has plagued countries around the world. When a high-rise explosion or fire accident occurs, the trapped people cannot be transferred to a safe place in a short time. The trapped people usually escape to the roof or window to wait for rescue. Firefighters usually use fire rescue equipment such as ropeway descent devices, rescue slides or portable elevators for high-altitude rescue. However, before using these devices, the equipment must be fixed at a position higher than the trapped people at high altitude before rescue can be carried out. The selection of fixed points for rescue equipment is more troublesome. Due to certain special and complex sites and environments, it is necessary to observe and study the equipment fixing points in complex environments, which will delay the rescue time. Therefore, there is an urgent need for a device that can automatically retract and retract. A flexible and convenient high-altitude rescue drone, such as the invention patent with announcement number CN109847221B, which discloses a high-altitude rescue platform and a high-altitude rescue system, which has its own fixing device and can be fixed on a high-altitude bearing stress surface, so that the support plate connected to the fixing device is extended at the required target position to facilitate the carrying of trapped persons and rescuers. The platform is provided with pedals and guardrails, but the flexibility is insufficient, and the platform has no other obstructions except the guardrails, which poses certain challenges and shadows to trapped persons with acrophobia, and when the number of rescuers and trapped persons is large, there are serious safety hazards. Summary of the invention

[0003] The purpose of the present invention is to provide a rescue drone designed to solve the deficiencies of the above-mentioned technology.

[0004] The present invention designs a rescue drone, including a protective net and a grid frame, wherein the grid frame includes a plurality of circumferentially distributed fixed parts, adjacent fixed parts are connected by a folding structure, the protective net is arranged at the bottom of the grid frame formed by the fixed parts and the folding structures, and the grid frame is expanded or contracted by telescoping the folding structures, a fixed part at the middle position of one side of the grid frame is provided with an entrance and exit communicating with the interior of the grid frame, the entrance and exit is provided with a retractable rescue ladder, and retractable propeller structures are provided on the fixed parts on opposite sides of the grid frame.

[0005] Preferably, a foldable protective outer cover is provided between the fixing parts, and the folding structure is located inside the protective outer cover.

[0006] Further optimization is provided with a accommodating groove on the outer side surface of the fixed part where the propeller structure is located, and each propeller structure includes a telescopic rod, a support tube, a propeller and a control mechanism, one end of the support tube is hinged to the top of the accommodating groove, and the other end is provided with a propeller, the fixed end of the telescopic rod is arranged at the bottom of the accommodating groove, the telescopic end of the telescopic rod is connected to the middle position of the support tube, the support tube is driven by the telescopic rod to rotate into the accommodating groove, and the propeller is retracted along the length direction of the support tube after stopping working, so that the support tube and the propeller can be stored in the accommodating groove, and the control mechanism is located in the support tube or the fixed part and is electrically connected to the propeller to control the operation of the propeller.

[0007] Further optimized, the folding structure includes at least two cross components, each cross component includes two cross-pivoted connecting rods, the ends of the connecting rods between adjacent cross components are pivoted to each other, the connecting rod near the fixed part is connected to the fixed part, and a telescopic part for driving the cross component to fold is also provided between two adjacent fixed parts.

[0008] Preferably, the rescue ladder includes a base plate and a sliding plate, the base plate is hinged at the bottom of the entrance and exit and a stretching rod is provided between the base plate and the inner wall of the entrance and exit, the sliding plate is axially slidably connected to the base plate, first guardrails are provided on both sides of the upper surface of the sliding plate, the two first guardrails are rotatably connected to the sliding plate and can be flipped toward each other to be tightly attached to the upper surface of the sliding plate; second guardrails are provided on both sides of the upper surface of the base plate.

[0009] Further optimization, the sliding plate is located above the base plate, and both sides of the sliding plate are bent to form installation grooves, and racks are provided in the installation grooves along the length direction of the sliding plate, and gears that cooperate with the racks are provided on both sides of the base plate, and a connecting shaft is provided between the two gears, and a first motor structure that drives the connecting shaft to rotate is provided on the connecting shaft, and the connecting shaft drives the gear to rotate, and the gear drives the sliding plate to reciprocate along the rack, thereby realizing the telescopic action of the sliding plate relative to the base plate.

[0010] Further optimization is provided between the sliding plate and the bottom plate, and the limiting guide structure includes rollers and limiting plates, the upper surface of the bottom plate is provided with a groove body along its own length direction, and an upper and lower layers of rollers are provided between the two side walls of the top part of the groove body, each layer has a plurality of rollers, and each layer of multiple rollers is equidistant and parallel distributed along the length direction of the groove body, and a gap is left between the two layers of rollers, one end of the limiting plate is connected to the lower surface of the sliding plate or extends from the sliding plate, and the other end of the limiting plate is bent and extends to the top of the sliding plate to form an insertion end, when the sliding plate is extended along the bottom plate, the insertion end of the sliding plate is inserted into the gap, so that the two layers of rollers form upper and lower limits for the limiting plate; pins are provided on both sides of the limiting plate, and guide grooves for corresponding pins to be inserted are provided on both side walls of the groove body along the length direction.

[0011] Further optimization, the first guardrail includes a rectangular frame, the lower long side of the frame is parallel to the sliding plate along the length direction of the sliding plate and is rotatably connected to the upper surface of the sliding plate through a second motor structure, and a first blocking net is arranged between the two short sides and the upper long side, and the frame and the first blocking net can be rotated through the lower long side to be close to the upper surface of the sliding plate.

[0012] Further optimization, the second guardrail includes a vertical rod, which is rotatably connected to the side of the base plate through a third motor structure, and four vertical rods are distributed on both sides of the base plate in groups of two, and the two vertical rods on the same side rotate towards each other, and a second blocking net is provided between the two vertical rods on the same side.

[0013] Further optimization is carried out by providing coaxial rotating shafts inside the two vertical rods located at the top of the base plate, and the rotating shafts rotate back and forth through transmission between the transmission structure and the corresponding third motor. A hook-shaped member that rotates with the rotating shaft is provided on the vertical rod, and a hook portion is formed on the top of the hook-shaped member. The hook portion rotates with the hook-shaped member to the short side of the nearest first guardrail and hooks the short side, so that the vertical rod is connected to the second guardrail.

[0014] The rescue drone provided by the present invention comprises a retractable grid and a rescue ladder. The grid can be folded into place through a folding structure, thereby reducing the space occupied by the grid and facilitating transportation and storage.

[0015] The grid frame includes a plurality of fixed parts, and the adjacent fixed parts are connected by a folding structure. The fixed parts can not only support the folding structure, but also be used to accommodate the driving device that drives the folding structure to move. The fixed parts and the folding structure are enclosed to form a grid frame. The fixed parts on the opposite sides are provided with propeller structures. The rescue ladder is retractably arranged outside the fixed parts. The grid frame and the rescue ladder are carried by an unmanned aerial vehicle to the target position. The rescue ladder is extended to the target position, thereby breaking through the restrictions of special sites and complex environments. The trapped persons enter the inside of the grid frame along the rescue ladder. The rescue ladder is hidden in the fixed part after it is folded up. The space is compact and the safety is high. The inside of the grid frame can accommodate a large number of people, so that the rescue personnel can provide first aid to the injured trapped persons in the grid frame during the rescue process, race against time with the god of death, quickly respond to the needs of high-altitude rescue, and improve the rescue efficiency.

[0016] The rescue ladder is a retractable plate structure with guardrails on both sides that can be flipped and folded. The surface of the guardrail is a net. The structure is simple and easy to implement, and the whole is automated. It is mostly driven by electric motors instead of heavyweight drives such as pneumatic and hydraulic pressure. This not only reduces the weight of the whole machine, but also improves control, transmission and precision, and responds faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structural diagram of the rescue ladder in the extended state;

[0018] Figure 2It is the overall structural diagram of the rescue ladder in the retracted state;

[0019] Figure 3 It is a side view of the grid when it is stretched out;

[0020] Figure 4 It is the structural diagram of the grid in the contracted state;

[0021] Figure 5 It is the overall structural diagram of the rescue ladder;

[0022] Figure 6 It is the internal structure diagram of the vertical rod;

[0023] Figure 7 This is a bottom view of the rescue ladder;

[0024] Figure 8 This is another perspective of the rescue ladder;

[0025] Fig. 9 It is a structural diagram of the limit piece in the sliding plate;

[0026] Fig.10 It is a structural diagram of the roller in the bottom plate;

[0027] Fig.11 It is a locking structure diagram between the first guardrail, the sliding plate and the cam.

[0028] In the figure: 1, protective net; 2, grid; 21, fixed part; 22, accommodating groove; 3, folding structure; 31, connecting rod; 32, telescopic member; 33, protective cover; 4, entrance and exit; 5, rescue ladder; 51, bottom plate; 511, gear; 512, connecting shaft; 513, first motor structure; 514, trough; 515, roller; 516, gap; 517, guide groove; 52, second guardrail; 521, vertical rod; 522, third motor structure; 523, hook-shaped member; 524, hook; 525, second blocking net;

[0029] 526, rotating shaft; 527, screw rod; 528, slider; 529, stop hook;

[0030] 53, sliding plate; 531, mounting groove; 532, rack; 54, first guardrail; 542, lower long side; 543, upper long side; 544, short side; 545, first blocking net; 546, second motor structure; 55, limit plate; 56, pin; 6, propeller structure; 61, telescopic rod; 62, support tube; 63, propeller;

[0031] 7. Housing; 71. Fourth motor structure; 72. Cam; 73. Limiting hole. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0033] The present invention includes a protective net 1 and a grid frame 2. The grid frame 2 includes a plurality of circumferentially distributed fixing portions 21. Adjacent fixing portions 21 are connected by a folding structure 3. In the present embodiment, the fixing portion 21 is a rectangular hollow structure. The fixing portion 21 and the folding structure 3 are arranged to form the grid frame 2. The grid frame 2 is rectangular and has an open structure at the upper and lower ends. The fixing portions 21 are located at the four ends of the rectangle. A fixing portion 21 is also arranged at the central position of each of the two long sides of the rectangular fixing portion 21, and two fixing portions 21 are arranged on each of the two short sides. The protective net 1 is located at the bottom of the grid frame 2 and its edges are fixedly connected to the fixing portion 21 and the bottom of the folding structure 3. The fixing portion 21 plays a supporting role. After the protective net 1 is tightened, it is used for trapped persons to stand. The grid frame 2 is expanded or contracted by the telescopic action of each folding structure 3, so that the grid frame 2 can be in a contracted state when not in use, thereby reducing the overall volume and the overall occupied space, so as to facilitate loading of trucks.

[0034] On the two short sides of the grid 2, a total of four fixed parts 21 are provided with retractable propeller structures 6. Through the propeller structures 6, the grid 2 can fly to high altitudes for rescue. When not in use, the propeller structures 6 can be retracted to the inside of the corresponding fixed parts 21.

[0035] The engine power system of the propeller structure 6 usually adopts an electric system, and the propeller 63 adopts a propeller.

[0036] An entrance 4 communicating with the interior of the grid frame 2 is provided at the fixed portion 21 in the center of one side of the grid frame 2. The entrance 4 is provided with a retractable rescue ladder 5. When the grid frame 2 flies to an appropriate position on a high-rise building, the rescue ladder 5 can be automatically extended. This is suitable for situations where the location is narrow or it is inconvenient to approach the entrance 4. The trapped persons enter the grid frame 2 along the rescue ladder 5, and the rescue ladder 5 can automatically retract to the entrance 4 without affecting the overall volume of the grid frame 2.

[0037] A foldable protective outer cover 33 is provided between the fixed parts 21, and the folding structure 3 is located inside the protective outer cover 33. The protective outer cover 33 plays a protective role when the grid 2 is expanded and contracted, which can not only protect the folding structure 3, but also prevent the trapped persons located in the grid 2 from being injured by the folding structure 3. The protective outer cover 33 folds and retracts with the folding structure 3.

[0038] The outer side surface of the fixed part 21 where the propeller structure 6 is located is provided with a receiving groove 22. The propeller structure 6 includes a telescopic rod 61, a support tube 62, a propeller 63 and a control mechanism. One end of the support tube 62 is hinged to the top of the receiving groove 22, and the other end is provided with a propeller 63. The fixed end of the telescopic rod 61 is arranged at the bottom of the receiving groove 22, and the telescopic end of the telescopic rod 61 is connected to the middle position of the support tube 62. The support tube 62 is driven by the telescopic rod 61 to rotate into the receiving groove 22. The support tube 62 includes a two-section tube structure, which can be extended by The retractable structure automatically retracts and retracts. When the propeller 63 stops rotating, the support tube 62 retracts and rotates into the receiving groove 22. After the propeller 63 stops working, it is retracted along the length direction of the retracted support tube 62, so that both the support tube 62 and the propeller 63 can be stored in the receiving groove 22. The control mechanism is located in the support tube 62 or the fixed part 21 and is electrically connected to the propeller 63 to control the operation of the propeller 63, and at the same time controls the extension and retraction of the support tube 62 and the telescopic rod 61. The specific structure and principle of the control mechanism are conventional technologies and are not described here.

[0039] The folding structure 3 includes at least two cross components, each cross component includes two cross-pivoted connecting rods 31, and the two connecting rods 31 cross to form an X-shaped cross component. The ends of the connecting rods 31 between adjacent cross components are pivoted to each other, and the connecting rod 31 near the fixed part 21 is connected to the fixed part 21, so that the folding structure 3 can be moved horizontally to form a fold. A telescopic member 32 for driving the cross component to fold is also provided between the two adjacent fixed parts 21. One end of the telescopic member 32 is connected to one of the fixed parts 21, and the other end is connected to the other fixed part 21. The telescopic member 32 can be a telescopic electric rod or a hydraulic rod. The telescopic member 32 is automatically extended and retracted to drive the folding structure 3 between the two adjacent fixed parts 21 to move and fold, so that the two adjacent fixed parts 21 move toward each other, thereby realizing the contraction of the grid 2.

[0040] The rescue ladder 5 includes a base plate 51 and a sliding plate 53. The base plate 51 is hinged at the bottom of the entrance and exit 4 and a stretching rod is provided between the base plate 51 and the inner wall of the entrance and exit 4. The stretching rod usually adopts a telescopic electric rod or a hydraulic rod. When rescue is needed, the stretching rod pushes the base plate 51 to rotate outward to a certain angle. When the rescue is completed, the stretching rod pulls the base plate 51 to rotate into the entrance and exit 4, so that the base plate 51 can be retracted into the entrance and exit 4.

[0041] The sliding plate 53 is located above the base plate 51, and both sides of the sliding plate 53 are bent downward to form an installation groove 531. The inner wall of the installation groove 531 is provided with a rack 532 along the length direction of the sliding plate 53. Gears 511 cooperating with the rack 532 are provided on both sides of the base plate 51. A connecting shaft 512 is provided between the two gears 511. A first motor structure 513 driving the connecting shaft 512 to rotate is provided on the connecting shaft 512. The transmission connection between the first motor structure 513 and the connecting shaft 512 can adopt a gear 511 structure. Since it is a conventional technology, it is not described here. The connecting shaft 512 drives the gear 511 to rotate, and the gear 511 drives the sliding plate 53 to reciprocate along the rack 532, so that the sliding plate 53 can be telescopic relative to the base plate 51, and finally the sliding plate 53 is axially slidably connected to the base plate 51, that is, the sliding plate 53 can be telescopic relative to the base plate 51.

[0042] A limiting guide structure is provided between the sliding plate 53 and the bottom plate 51, and the limiting guide structure includes a roller 515 and a limiting sheet 55. A groove 514 is provided on the upper surface of the bottom plate 51 along its length direction. An upper and lower layer of rollers 515 are provided between the two side walls of the top portion of the groove 514. Each layer of rollers 515 has a plurality of rollers 515, and each layer of rollers 515 is equidistantly and parallelly distributed along the length direction of the groove 514. A certain gap 516 is left between the two layers of rollers 515, and the top of the rotating surface of the lower layer of rollers 515 is flush with the bottom surface of the groove 514.

[0043] One end of the limiting plate 55 is connected to the lower surface of the sliding plate 53 or extends from the sliding plate 53, and the other end of the limiting plate 55 is bent and extends toward the top of the sliding plate 53 to form an insertion end. When the sliding plate 53 is extended along the bottom plate 51, the insertion end of the sliding plate 53 is inserted into the gap 516, so that the two layers of rollers 515 form upper and lower limits for the limiting plate 55; pins 56 are provided on both sides of the limiting plate 55, and guide grooves 517 for inserting corresponding pins 56 are opened along the length direction of the two side walls of the groove body 514.

[0044] In this embodiment, two grooves 514 are arranged in parallel on the bottom plate 51 , and there are also two corresponding limit plates 55 , so that the sliding plate 53 can move stably along the bottom plate 51 without causing one end of the sliding plate 53 to tilt up during movement.

[0045] First guardrails 54 are arranged on both sides of the upper surface of the sliding plate 53. The two first guardrails 54 are rotatably connected to the sliding plate 53 and can be turned toward each other to be closely attached to the upper surface of the sliding plate 53, that is, the first guardrails 54 can be turned and folded;

[0046] Furthermore, the first guardrail 54 includes a rectangular frame, the lower long side 542 of the frame is parallel to the sliding plate 53 along the length direction of the sliding plate 53 and is rotatably connected to the upper surface of the sliding plate 53 through the second motor structure 546, and a first blocking net 545 is arranged between the two short sides 544 and the upper long side 543. The first blocking net 545 can be made of mesh cloth, which can reduce the weight of the first guardrail 54, and the first blocking net 545 is detachable. The first blocking net 545 can be rotated with the frame to be close to the upper surface of the sliding plate 53. The transmission connection between the second motor structure 546 and the lower long side 542 can adopt a gear 511 structure or a belt transmission structure. Since it is a conventional technology, it will not be repeated here. The second motor structure 546 realizes the forward and reverse rotation of the lower long side 542 through the transmission structure, thereby realizing the flipping of the first guardrail 54.

[0047] The second guardrail 52 is arranged on both sides of the upper surface of the bottom plate 51. The second guardrail 52 includes a vertical rod 521. The vertical rod 521 is rotatably connected to the side of the bottom plate 51 through a third motor structure 522. Four vertical rods 521 are distributed on both sides of the bottom plate 51 in groups of two. In this embodiment, each vertical rod 521 is correspondingly provided with a third motor structure 522, so that it rotates under the drive of the third motor structure 522. The transmission connection between the third motor structure 522 and the vertical rod 521 is a conventional technology and is not described here. The two vertical rods 521 on the same side rotate towards each other, that is, the two vertical rods on the same side of the four vertical rods 521 rotate towards each other to be consistent with the length direction of the bottom plate 51, that is, the vertical rods 521 are folded to both sides of the bottom plate 51, so that when the sliding plate 53 slides to the top of the bottom plate 51, no interference will be formed, and the vertical rods 521 can be hidden in the mounting groove 531, which is not only compact in structure, but also reduces the overall weight.

[0048] A second blocking net 525 is provided between the two vertical rods 521 on the same side. Both ends of the second blocking net 525 are fixed on the opposite vertical rods 521. The structure of the second blocking net 525 is the same as that of the first blocking net 545, both of which are mesh cloth. When the two vertical rods 521 are relatively rotated and folded, the second blocking net 525 changes from the original taut state to a loose state and folds along with the vertical rods 521. Since the upper side of the second blocking net 525 becomes loose while the lower side is still in a taut state, the second blocking net 525 as a whole is still in a lateral position of the bottom plate 51. As the sliding plate 53 slides to just above the bottom plate 51, the second blocking net 525 will enter the mounting groove 531 along with the mounting groove 531. A gap 516 is left between the folded edge of the mounting groove 531 and the side surface of the bottom plate 51, rather than a tight fit. Therefore, the second blocking net 525 enters the mounting groove 531 from one end of the mounting groove 531 and will not be stuck between the mounting groove 531 and the bottom plate 51.

[0049] The two vertical rods 521 at the top of the bottom plate 51 are provided with a rotating shaft 526 coaxial with the vertical rod 521. The rotating shaft 526 is transmitted through the transmission structure and the corresponding third motor structure 522 to reciprocate. A hook-shaped member 523 is provided near the top of the vertical rod 521. The bottom of the hook-shaped member 523 is sleeved on the rotating shaft 526 and rotates with the rotating shaft 526. The top of the hook-shaped member 523 forms a hook portion 524. The hook portion 524 rotates with the hook-shaped member 523 to the short side 544 of the first guardrail 54 and hooks the short side 544, so that the vertical rod 521 and the second guardrail 52 are limited, so that the first guardrail 54 The guardrail 54 and the second guardrail 52 can be more stable. It should be noted that when the vertical rod 521 needs to be folded to the side of the bottom plate 51, the hook 523 is first rotated to disengage from the first guardrail 54, and then rotated to be perpendicular to the vertical rod 521 and on the same side as the second blocking net 525. After the vertical rod 521 is folded to the side of the bottom plate 51, the hook 523 faces downward and close to the side of the bottom plate 51. At this time, when the sliding plate 53 slides toward the bottom plate 51, there is a gap 516 between the folded edge of the mounting groove 531 and the side of the bottom plate 51, which serves as an avoidance space for the hook 523, so that there will be no interference when the sliding plate 53 slides above the bottom plate 51.

[0050] The top of the sliding plate 53 is bent downward to form a bent portion, so that the sliding plate 53 can be hung on the window sill of a high-altitude building or the edge of various platforms after being extended to the highest point, so that the sliding plate 53 can be docked in a balanced manner at the rescue position, making it easy for trapped people to step on the sliding plate 53.

[0051] The vertical rod 521 is hollow inside, and an axially arranged screw rod 527 is arranged inside the vertical rod 521. A slider 528 is slidably connected to the screw rod 527. An axial slide groove is opened on the side of the vertical rod 521. One side of the second blocking net 525 extends into the slide groove and is provided with a plurality of limit blocks along the axial direction. The second blocking net 525 forms a movable limit between the limit block and the slide groove, so that the second blocking net 525 can be lifted up and down along the slide groove. The top of the side of the second blocking net 525 is fixed on the slider 528. A motor structure that drives the screw rod 527 to rotate is arranged on the top of the vertical rod 521. The slider 528 is used as a screw. The nut can be automatically raised and lowered under the rotation of the screw rod 527. When the second blocking net 525 is lowered to a folded state, the limit blocks will be stacked in the slide groove in sequence, so that the second blocking net 525 can be folded smoothly. Usually, the second blocking net 525 is folded first, and then the vertical rod 521 is controlled to fold. Both sides of the bottom plate 51 are provided with blocking hooks 529 located in the central position below the second blocking net 525. The folded second blocking net 525 is limited on the blocking hooks 529, so that the second blocking net 525 will not fall after being folded, so that the folded second blocking net 525 can avoid interfering with the sliding of the sliding plate.

[0052] It should be noted that the rotating shaft 526 is located inside the screw rod 527, so that the screw rod 527 and the rotating shaft 526 do not interfere with each other, and the highest rising point of the slider 528 is located below the hook-shaped member 523, so the slider 528 and the rotating shaft 526 do not interfere with each other, that is, the slider 528 and the hook-shaped member 523 do not interfere with each other; in addition, the bottom of the hook-shaped member 523 is fixed on the rotating shaft 526 and rotates with the rotating shaft 526. The rotating shaft 526 is located inside the screw rod 527, and the bottom of the hook-shaped member 523 is sleeved on the outside of the screw rod 527. The screw rod 527 is circumferentially provided with an avoidance groove, so that the bottom of the hook-shaped member 523 can rotate along the avoidance groove. The rotation angle of the hook-shaped member 523 is not 360 degrees, so the avoidance groove does not surround the entire screw rod 527, so the screw rod 527 and the bottom of the hook-shaped member 523 will not interfere with each other.

[0053] It should be noted that the second motor structure 546 is arranged on the sliding plate 53. The sliding plate 53 is provided with a shell 7 at a position symmetrical to the second motor structure 546 along the length direction. The shell 7 is provided with a fourth motor structure 71. The lower long side 542 of the first guardrail 54 passes through the shell 7. A cam 72 is provided at the output end of the fourth motor structure 71. The rotation direction of the cam 72 is the same as the length direction of the sliding plate 53. A limiting hole 73 is provided at the lower long side 542 directly opposite to the cam 72. In the starting stage, the cam 72 rotates to the front or rear side. When the fourth motor structure 71 drives the cam 72 to rotate, the cam 72 rotates to be inserted into the limiting hole 73 and forms a left and right limit with the limiting hole 73, so that the first guardrail 54 will not easily flip outward. This has a certain stabilizing effect on the second guardrail 52 that is hooked to the first guardrail 54 through the hook-shaped member 523. When unlocking is required, the cam 72 only needs to be rotated to the starting stage position. Fig.11 The figure shows the state where the cam 72 is inserted into the limiting hole 73 to form a limiting state.

[0054] The present invention also includes a control system, a power system, a flight control system and a remote control system, all of which are electrically connected to the folding structure 3, the rescue ladder 5 and each motor to control and coordinate the actions of the entire machine and realize automated rescue by drone.

[0055] The power parameter values ​​of the propellers 63 of the present invention are not limited and can be set according to the overall size and weight of the actual grid 2. Those skilled in the art can obtain values ​​that can meet the full-load flight requirements of the grid 2 through several tests.

[0056] In the present invention, the fixing part 21, the paddle 63, the sliding plate 53 and the bottom plate 51 can be made of materials with relatively high hardness and strength, such as hard plastic, carbon fiber or aluminum alloy, which are lightweight and have certain strength.

[0057] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A rescue drone, characterized in that: The invention comprises a protective net (1) and a grid frame (2), wherein the grid frame (2) comprises a plurality of circumferentially distributed fixed parts (21), adjacent fixed parts (21) are connected by folding structures (3), the protective net (1) is arranged at the bottom of the grid frame (2) formed by the fixed parts (21) and the folding structures (3), and the grid frame (2) is expanded or contracted by the telescopic action of each folding structure (3), a fixed part (21) at the middle position of one side of the grid frame (2) is provided with an entrance (4) communicating with the inside of the grid frame (2), and a retractable rescue ladder (5) is provided at the entrance (4), and retractable paddle structures (6) are provided on the fixed parts (21) on opposite sides of the grid frame (2). The rescue ladder (5) comprises a bottom plate (51) and a sliding plate (53); the bottom plate (51) is hinged to the bottom of the entrance (4) and a stretching rod is provided between the bottom plate (51) and the inner wall of the entrance (4); the sliding plate (53) is axially slidably connected to the bottom plate (51); first guardrails (54) are provided on both sides of the upper surface of the sliding plate (53); the two first guardrails (54) are rotatably connected to the sliding plate (53) and can be turned toward each other to be closely attached to the upper surface of the sliding plate (53); second guardrails (52) are provided on both sides of the upper surface of the bottom plate (51); The first guardrail (54) comprises a rectangular frame, wherein the lower long side (542) of the frame is parallel to the sliding plate (53) along the length direction of the sliding plate (53) and is rotatably connected to the upper surface of the sliding plate (53) via a second motor structure (546), and a first blocking net (545) is arranged between the two short sides (544) and the upper long side (543), and the frame and the first blocking net (545) can be rotated to be in close contact with the upper surface of the sliding plate (53) via the lower long side (542). The second guardrail (52) comprises a vertical rod (521), wherein the vertical rod (521) is rotatably connected to the side of the bottom plate (51) via a third motor structure (522), and four vertical rods (521) are distributed on both sides of the bottom plate (51) in groups of two, and the two vertical rods (521) on the same side rotate towards each other, and a second blocking net (525) is provided between the two vertical rods (521) on the same side. Two vertical rods (521) located at the top of the bottom plate (51) are provided with coaxial rotating shafts (526) therein, and the rotating shafts (526) are reciprocatingly rotated by transmitting between the transmission structure and the corresponding third motor, and the vertical rods (521) are provided with hook-shaped members (523) rotating with the rotating shafts (526), ​​and the top of the hook-shaped members (523) forms a hook portion (524), and the hook portion (524) rotates with the hook-shaped members (523) to the short side (544) of the first guardrail (54) and hooks the short side (544), so that the vertical rods (521) are connected to the second guardrail (52).

2. The rescue drone according to claim 1, characterized in that: A foldable protective outer cover (33) is provided between the fixing parts (21), and the folding structure (3) is located inside the protective outer cover (33).

3. The rescue drone according to claim 2, characterized in that: The outer side surface of the fixed part (21) where the propeller structure (6) is located is provided with a receiving groove (22), and each propeller structure (6) comprises a telescopic rod (61), a support tube (62), a propeller (63) and a control mechanism. One end of the support tube (62) is hinged to the top of the receiving groove (22), and the other end is provided with a propeller (63). The fixed end of the telescopic rod (61) is arranged at the bottom of the receiving groove (22), and the telescopic end of the telescopic rod (61) is connected to the middle position of the support tube (62). The support tube (62) is driven by the telescopic rod (61) to rotate into the receiving groove (22). After the propeller (63) stops working, it is retracted along the length direction of the support tube (62), so that the support tube (62) and the propeller (63) can be stored in the receiving groove (22). The control mechanism is located in the support tube (62) or the fixed part (21) and is electrically connected to the propeller (63) to control the operation of the propeller (63).

4. The rescue drone according to claim 3, characterized in that: The folding structure (3) comprises at least two cross components, each cross component comprises two cross-pivoted connecting rods (31), the ends of the connecting rods (31) between adjacent cross components are pivotally connected to each other, the connecting rod (31) closest to the fixed part (21) is connected to the fixed part (21), and a telescopic member (32) for driving the cross component to fold is also provided between two adjacent fixed parts (21).

5. The rescue drone according to claim 4, characterized in that: The sliding plate (53) is located above the bottom plate (51), and both sides of the sliding plate (53) are bent to form a mounting groove (531), and a rack (532) is arranged in the mounting groove (531) along the length direction of the sliding plate (53), and gears (511) matched with the rack (532) are arranged on both sides of the bottom plate (51), and a connecting shaft (512) is arranged between the two gears (511), and a first motor structure (513) for driving the connecting shaft (512) to rotate is arranged on the connecting shaft (512), and the connecting shaft (512) drives the gear (511) to rotate, and the gear (511) drives the sliding plate (53) to reciprocate along the rack (532), thereby realizing the telescopic action of the sliding plate (53) relative to the bottom plate (51).

6. The rescue drone according to claim 5, characterized in that: A limiting guide structure is provided between the sliding plate (53) and the bottom plate (51), and the limiting guide structure comprises rollers (515) and limiting plates (55). A groove (514) is provided on the upper surface of the bottom plate (51) along its length direction, and two layers of rollers (515) are provided between the two side walls of the top portion of the groove (514). Each layer has a plurality of rollers (515), and each layer of the plurality of rollers (515) is equidistantly and parallelly distributed along the length direction of the groove (514). A gap (516) is left between the two layers of rollers (515). The limiting plates (55) are arranged on the upper surface of the bottom plate (51) along its length direction. One end of the limiting piece (55) is connected to the lower surface of the sliding plate (53) or extends from the sliding plate (53), and the other end of the limiting piece (55) is bent and extends toward the top of the sliding plate (53) to form an insertion end. When the sliding plate (53) extends along the bottom plate (51), the insertion end of the sliding plate (53) is inserted into the gap (516), so that the two layers of rollers (515) form upper and lower limits for the limiting piece (55); pins (56) are provided on both sides of the limiting piece (55), and guide grooves (517) for corresponding pins (56) to be inserted are opened along the length direction on the two side walls of the groove body (514).

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