A heavy-load multi-rotor UAV

Abstract

The invention discloses a heavy-load multi-rotor UAV, which relates to the technical field of UAVs and comprises a body, a cantilever with a rotor fixedly connected to the outer side of the body, a box for storing a hoisted load is arranged at the bottom of the body, a clamping mechanism for preventing the box from rotating is arranged at the outer side of the body, a connecting mechanism for quickly separating the box from the body is arranged at the top of the box, and a lifting mechanism for preventing the hoisted load from swinging back and forth is arranged at the bottom of the body. By providing the clamping mechanism, when the UAV is hoisting a load, a cross bar is used to abut against two sides of the box storing the load, so that when the UAV is flying, the two cross bars abutting against the sides of the box limit the rotation of the box in the horizontal direction, and preventing horizontal rotation can make the load maintain a relatively stable posture during the flight, reduce the shaking and instability of the UAV caused by rotation, and improve the safety of the UAV flight.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to a heavy-load multi-rotor UAV. Background Art

[0002] Heavy-load multi-rotor drones are multi-rotor aircraft specially designed to carry heavier loads. Compared with ordinary multi-rotor drones, heavy-load multi-rotor drones have stronger power systems and more solid structures, which can ensure the safe carrying of heavier cargo, equipment or sensors. Heavy-load multi-rotor drones can be used to transport cargo to the destination quickly and efficiently, especially in some inconvenient transportation or emergency situations. In order to achieve heavy-load capacity, such drones usually need to be equipped with high-performance motors, propellers, batteries and advanced flight control systems to ensure flight stability and safety. At the same time, in the design and manufacturing process, factors such as structural strength and weight distribution also need to be fully considered to improve the carrying capacity and flight performance of the drone.

[0003] However, heavy-load multi-rotor drones have the following defects when used in some special environments:

[0004] 1. When a drone is flying with a load suspended by ropes, the drone may change its posture during flight, such as tilting, rotating, etc., causing the load to be subjected to forces in different directions, which may be transmitted to the load through the ropes, causing the load to rotate horizontally. The horizontal rotation of the load may generate additional air resistance and unbalanced force, affecting the flight stability and maneuverability of the drone, which may cause the drone to consume more energy to maintain balance. Excessive energy consumed to maintain balance leads to shortened flight time and range.

[0005] 2. Existing drones usually come with a box for carrying payloads. The box is not convenient to disassemble quickly when the drone is flying without load. The empty box increases the flight resistance of the drone, which may reduce the range of the drone during flight. It is also inconvenient to replace a damaged box. At the same time, when the drone rises in height, the suspended box may be entangled with branches and hooked together, and the drone is prone to falling.

[0006] Therefore, the present invention proposes a heavy-load multi-rotor UAV to make up for and improve the deficiencies of the prior art. Summary of the invention

[0007] In view of the above problems, the invention provides a heavy-load multi-rotor drone, which can effectively solve the problems of collision, load swing and rotation when hanging loads in the prior art. In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:

[0008] The present invention discloses a heavy-load multi-rotor UAV, comprising a body, a cantilever with a rotor fixedly connected to the outside of the body, a box for storing a hoisted load arranged at the bottom of the body, a clamping mechanism for preventing the box from rotating arranged at the outside of the body, a connecting mechanism for quickly separating the box from the body arranged at the top of the box, and a lifting mechanism for preventing the hoisted load from swinging back and forth arranged at the bottom of the body.

[0009] The clamping mechanism comprises connecting rods symmetrically connected to the side of the machine body for rotation, each connecting rod is fixedly connected to a vertical rod on the outside, and one end of the vertical rod away from the connecting rod is fixedly connected to a horizontal rod.

[0010] The connecting mechanism includes a cross-shaped hanger attached to the upper surface of the box body, a plurality of sliding grooves are provided at the bottom of the hanger, a second sliding rod is fixedly connected in each of the sliding grooves, a clamping block is symmetrically and slidably sleeved on the outside of the second sliding rod, a return spring is sleeved on the outside of the second sliding rod between the two clamping blocks, a plurality of positioning holes are provided on the upper surface of the box body, the positioning holes and the clamping blocks correspond to each other one by one, and a tangent component for separating the box body is provided on the upper surface of the hanger.

[0011] Furthermore, the tangent assembly includes a third sliding rod symmetrically fixedly connected to the upper surface of the bracket, each of the third sliding rods is slidably sleeved on the outside with a sliding sleeve, a V-shaped cutter is fixedly connected between the two sliding sleeves, an electric push rod is fixedly connected to the upper surface of the bracket, and the output end of the electric push rod is fixedly connected to the side of the V-shaped cutter away from the blade.

[0012] Furthermore, the lifting mechanism includes a shell fixedly connected to the groove at the bottom of the body, a mounting plate is symmetrically fixedly connected inside the shell, a rotating shaft is rotatably connected between the two mounting plates, a baffle is symmetrically fixedly connected outside the rotating shaft, a nylon rope is wrapped around the surface of the rotating shaft between the two baffles, one end of the nylon rope is fixedly connected to the rotating shaft, and the other end of the nylon rope is fixedly connected to the upper surface of the hanger, a limit assembly is arranged inside the box to prevent the load movement from causing the center of gravity of the box to shift, and a cable arrangement assembly is arranged inside the shell to prevent the nylon rope from knotting.

[0013] Furthermore, the cable arrangement assembly includes a first sliding rod fixedly connected between two mounting plates, the first sliding rod is slidably sleeved with an L-shaped moving rod, the vertical section of the L-shaped moving rod is threadedly connected with a reciprocating screw rod, both ends of the reciprocating screw rod are rotatably connected to the two mounting plates respectively, and the horizontal section of the L-shaped moving rod is provided with a guide hole, and the nylon rope passes through the guide hole.

[0014] Furthermore, one end of the rotating shaft is fixedly connected to a first pulley, one end of the reciprocating screw rod is fixedly connected to a second pulley, and the second pulley and the first pulley are connected via a synchronous belt transmission.

[0015] Furthermore, a motor is fixedly connected inside the shell, and an output end of the motor is fixedly connected to an end of the rotating shaft away from the first pulley.

[0016] Furthermore, the clamping mechanism also includes levers symmetrically fixedly connected to both ends of the connecting rod, and each of the levers is fixedly connected to a roller at one end away from the connecting rod, and the roller is located directly above the box body.

[0017] Furthermore, a torsion spring is sleeved on the outside of the connecting rod, one end of the torsion spring is fixedly connected to the side of the machine body, and the other end of the torsion spring is fixedly connected to the side of the vertical rod.

[0018] Furthermore, a limit block is fixedly connected to the side of the body, and the limit block is located above the vertical rod.

[0019] Furthermore, the limiting assembly includes a guide rod that symmetrically slides horizontally through the side wall of the box, one end of the guide rod is fixedly connected to an outer plate, and the other end of the guide rod is fixedly connected to an inner plate, and the inner plate is located inside the box.

[0020] Beneficial effects:

[0021] 1. By providing a clamping mechanism, when the drone is lifting a load, a cross bar is used to abut against the two sides of the box where the load is stored. In this way, when the drone is flying, the two cross bars abutting against the sides of the box limit the horizontal rotation of the box. Preventing horizontal rotation can keep the load in a relatively stable posture during flight, reduce the shaking and instability of the drone caused by rotation, and improve the safety of drone flight. The stable flight of the drone can reduce the energy consumption used to maintain balance, and the excess energy can be used to extend the flight time and range of the drone.

[0022] 2. By providing a connecting mechanism, when the UAV is flying without load, the two blocks are brought close to each other, so that the box is detached from the bottom of the bracket, so that the box can be quickly disassembled and replaced. When the UAV is flying without load, after the box is disassembled, the air can flow through the UAV body more smoothly, reducing air resistance and significantly reducing the overall weight of the UAV. The lighter weight and lower air resistance help reduce the energy consumption of the UAV, making the UAV more flexible, and accelerating, decelerating and turning more agile, thereby improving the flight performance and maneuverability of the UAV. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a three-dimensional structural diagram of the present invention from a first viewing angle.

[0025] Figure 2 It is a front view of the present invention.

[0026] Figure 3 It is a longitudinal cross-sectional view of the bottom of the machine body and the lifting mechanism in the present invention.

[0027] Figure 4 It is a cross-sectional view of the lifting mechanism in the present invention.

[0028] Figure 5 It is a three-dimensional structural diagram of the clamping mechanism in the present invention.

[0029] Figure 6 It is a longitudinal cross-sectional view of the limiting component in the present invention.

[0030] Figure 7 For the present invention Figure 5 A magnified view of the structure at center.

[0031] Figure 8 It is a three-dimensional structural diagram of the box body and the connecting mechanism in the present invention.

[0032] Fig. 9 It is a three-dimensional structural diagram of the connecting mechanism in the present invention.

[0033] Fig.10 It is a three-dimensional structural diagram of the tangent assembly in the present invention.

[0034] The numbers in the figure represent, respectively, 1, machine body; 2, lifting mechanism; 21, shell; 22, mounting plate; 23, rotating shaft; 24, baffle; 25, motor; 26, nylon rope; 27, box; 28, cable assembly; 281, reciprocating screw rod; 282, first slide rod; 283, L-shaped moving rod; 284, guide hole; 285, first pulley; 286, second pulley; 287, synchronous belt; 3, clamping mechanism; 31, connecting rod; 32, vertical rod; 33. Crossbar; 34. Torsion spring; 35. Limit block; 36. Push rod; 37. Roller; 38. Limit assembly; 381. Inner plate; 382. Guide rod; 383. Outer plate; 4. Cantilever; 5. Connecting mechanism; 51. Hanger; 52. Slide groove; 53. Second slide bar; 54. Block; 55. Return spring; 56. Positioning hole; 57. Thread cutting assembly; 571. Third slide bar; 572. Slide sleeve; 573. V-shaped cutter; 574. Electric push rod. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 without creative work are within the scope of protection of the present invention.

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] See also Figure 1 and Figure 8 A heavy-load multi-rotor UAV of this embodiment includes a body 1, a cantilever 4 with a rotor is fixedly connected to the outside of the body 1, a box 27 for storing a hoisted load is arranged at the bottom of the body 1, a clamping mechanism 3 for preventing the box 27 from rotating is arranged on the outside of the body 1, a connecting mechanism 5 for quickly separating the box 27 from the body 1 is arranged on the top of the box 27, and a lifting mechanism 2 for preventing the hoisted load from swinging back and forth is arranged at the bottom of the body 1.

[0038] See also Figure 1 , Figure 3 and Figure 4The lifting mechanism 2 includes a shell 21 fixedly connected to the groove at the bottom of the body 1, a mounting plate 22 is symmetrically fixedly connected inside the shell 21, a rotating shaft 23 is rotatably connected between the two mounting plates 22, a baffle 24 is symmetrically fixedly connected outside the rotating shaft 23, a nylon rope 26 is wound around the surface of the rotating shaft 23 between the two baffles 24, one end of the nylon rope 26 is fixedly connected to the rotating shaft 23, and the other end of the nylon rope 26 is fixedly connected to the upper surface of the hanger 51, a limit assembly 38 is arranged inside the box 27 to prevent the load movement from causing the center of gravity of the box 27 to shift, and a cable arrangement assembly 28 is arranged inside the shell 21 to prevent the nylon rope 26 from knotting.

[0039] A motor 25 is fixedly connected inside the housing 21 , and an output end of the motor 25 is fixedly connected to an end of the rotating shaft 23 away from the first pulley 285 .

[0040] During specific operation, the motor 25 drives the rotating shaft 23 to rotate, and the rotating shaft 23 reels the nylon rope 26 to the outside of the rotating shaft 23 between the two baffles 24. The nylon rope 26 lifts the box 27 containing the load during the reeling process, so that the height of the box 27 from the ground increases. Increasing the height from the ground can reduce the risk of the load colliding with ground obstacles, thereby improving flight safety.

[0041] See also Figure 1 and Figure 4 The cable arrangement assembly 28 includes a first sliding rod 282 fixedly connected between the two mounting plates 22. The first sliding rod 282 is slidably sleeved with an L-shaped moving rod 283. The vertical section of the L-shaped moving rod 283 is threadedly connected with a reciprocating screw rod 281. The two ends of the reciprocating screw rod 281 are respectively rotatably connected to the two mounting plates 22. The horizontal section of the L-shaped moving rod 283 is provided with a guide hole 284, and the nylon rope 26 passes through the guide hole 284.

[0042] One end of the rotating shaft 23 is fixedly connected to a first pulley 285 , one end of the reciprocating screw rod 281 is fixedly connected to a second pulley 286 , and the second pulley 286 and the first pulley 285 are connected to each other through a synchronous belt 287 .

[0043] During specific operation, when the nylon rope 26 is wound to the outside of the rotating shaft 23, the rotating shaft 23 synchronously drives the first pulley 285 to rotate, and the rotating first pulley 285 drives the second pulley 286 to rotate through the synchronous belt 287, and the rotating second pulley 286 drives the reciprocating screw rod 281 to rotate. When the reciprocating screw rod 281 rotates, it drives the L-shaped moving rod 283 to reciprocate along the first sliding rod 282. During the reciprocating movement of the L-shaped moving rod 283, it drives the nylon rope 26 passing through the guide hole 284 to reciprocate synchronously, so that the nylon rope 26 is evenly wound around the outside of the rotating shaft 23, thereby preventing the nylon rope 26 from being squeezed and knotted when it is wound.

[0044] See also Figure 6The limiting assembly 38 includes a guide rod 382 that symmetrically slides horizontally through the side wall of the box body 27, one end of the guide rod 382 is fixedly connected to an outer plate 383, and the other end of the guide rod 382 is fixedly connected to an inner plate 381, and the inner plate 381 is located inside the box body 27.

[0045] During specific operation, the UAV hovers in the air, and then the load is placed into the box 27. When the vertical rod 32 and the horizontal rod 33 of the UAV approach the side of the box 27, the horizontal rod 33 first hits the outer plate 383, and the outer plate 383 pushes the inner plate 381 to move toward the side of the load through the guide rod 382, ​​and hits the side of the load through the inner plate 381, thereby fixing the load inside the box 27, avoiding the load moving in the box 27 during flight, causing the center of gravity of the box 27 to change, resulting in reduced flight stability of the UAV.

[0046] See also Figure 2 , Figure 5 and Figure 7 The clamping mechanism 3 includes connecting rods 31 symmetrically connected to the side of the body 1 for rotation. Each connecting rod 31 is fixedly connected to a vertical rod 32 on the outside, and a horizontal rod 33 is fixedly connected to one end of the vertical rod 32 away from the connecting rod 31.

[0047] The clamping mechanism 3 further includes levers 36 symmetrically fixedly connected to both ends of the connecting rod 31 . One end of each lever 36 away from the connecting rod 31 is fixedly connected to a roller 37 , and the roller 37 is located directly above the box body 27 .

[0048] A torsion spring 34 is sleeved on the outside of the connecting rod 31 . One end of the torsion spring 34 is fixedly connected to the side of the machine body 1 , and the other end of the torsion spring 34 is fixedly connected to the side of the vertical rod 32 .

[0049] A limit block 35 is fixedly connected to the side of the body 1 , and the limit block 35 is located above the vertical rod 32 .

[0050] When the drone is in flight, the box 27 containing the load is first lifted up by the nylon rope 26 and is lifted close to the bottom of the body 1. When the box 27 is close to the bottom of the body 1, the top of the box 27 hits the surface of the roller 37, and the roller 37 pushes the lever 36 to rotate upward. The upwardly rotating lever 36 drives the vertical rod 32 to approach the side of the box 27 through the connecting rod 31. When the connecting rod 31 rotates, the torsion spring 34 is charged. When the vertical rod 32 approaches the box 27, the cross bar 33 is synchronously driven to squeeze the outer plate 383 on the side of the box 27, and the cross bar 33 is used to hit the two sides of the box 27 storing the load. In this way, when the drone is flying, the two cross bars 33 hitting the sides of the box 27 are used to limit the rotation of the box 27 in the horizontal direction. Preventing horizontal rotation can keep the load in a relatively stable posture during flight, thereby reducing the shaking and instability of the drone caused by rotation.

[0051] After the UAV flies to the position, it is necessary to lower the box 27 loaded with the load to the ground through the nylon rope 26. At this time, when the box 27 falls, the force that originally pushes the roller 37 to move upward gradually decreases. Under the elastic force of the torsion spring 34, the vertical rod 32 and the cross rod 33 are driven by the connecting rod 31 to rotate in the direction away from the box 27, so that the vertical rod 32 and the cross rod 33 are unfolded at the bottom of the body 1, and the vertical rod 32 and the cross rod 33 are limited by the limit block 35, and the unfolded vertical rod 32 and the cross rod 33 can be used as the landing bracket of the UAV.

[0052] See also Figure 8 , Fig. 9 and Fig.10 The connecting mechanism 5 includes a cross-shaped hanger 51 attached to the upper surface of the box body 27, and a plurality of slide grooves 52 are provided at the bottom of the hanger 51. A second slide rod 53 is fixedly connected in each slide groove 52. A clamping block 54 is symmetrically slidably sleeved on the outside of the second slide rod 53. A return spring 55 is sleeved on the outside of the second slide rod 53 between the two clamping blocks 54. A plurality of positioning holes 56 are provided on the upper surface of the box body 27. The positioning holes 56 correspond to the clamping blocks 54 one by one and match each other. A tangent component 57 for separating the box body 27 is provided on the upper surface of the hanger 51.

[0053] The cutting assembly 57 includes a third sliding rod 571 symmetrically fixedly connected to the upper surface of the hanging bracket 51, each third sliding rod 571 is slidably sleeved with a sliding sleeve 572 on the outside, a V-shaped cutter 573 is fixedly connected between the two sliding sleeves 572, and an electric push rod 574 is fixedly connected to the upper surface of the hanging bracket 51, and the output end of the electric push rod 574 is fixedly connected to the side of the V-shaped cutter 573 away from the blade.

[0054] In specific operation, the box 27 and the cross-shaped hanger 51 are quickly installed by inserting the block 54 into the positioning hole 56. The block 54 is firmly connected to the positioning hole 56 under the elastic force of the reset spring 55. When the box 27 needs to be quickly disassembled, the two blocks 54 are pushed close to each other at the same time, so that the two blocks 54 are separated from the side walls of the positioning hole 56, and then the box 27 is separated from the lower part of the hanger 51. When the box 27 carried by the drone rises in height and the box 27 is hooked on a branch, the V-shaped cutter 573 is pushed horizontally along the third slide bar 571 by the electric push rod 574, and the horizontally moving V-shaped cutter 573 cuts the nylon rope 26, so that the box 27 and the hanger 51 are separated from the body 1 together to prevent the drone from falling.

[0055] The overall working process:

[0056] The load is placed in the box 27, the motor 25 drives the rotating shaft 23 to rotate and reel the nylon rope 26 to the outside of the rotating shaft 23, the nylon rope 26 lifts the box 27 to the bottom of the machine body 1, the box 27 drives the cross bar 33 to rotate toward the side of the box 27 through the lever 36, the cross bar 33 first hits the outer plate 383, the outer plate 383 pushes the inner plate 381 to move toward the side of the load through the guide rod 382, ​​and hits the side of the load through the inner plate 381, so that the load is fixed inside the box 27, and at the same time the cross bar 33 hits the two sides of the box 27 where the load is stored, limiting the horizontal rotation of the box 27, while reeling in the nylon rope 26, the reciprocating screw rod 281 When rotating, the L-shaped moving rod 283 is driven to reciprocate along the first sliding rod 282. During the reciprocating movement of the L-shaped moving rod 283, the nylon rope 26 passing through the guide hole 284 is driven to reciprocate synchronously, so that the nylon rope 26 is evenly wound around the outside of the rotating shaft 23. By detaching the two blocks 54 from the side walls of the positioning hole 56, and then detaching the box body 27 from the lower part of the bracket 51, the box body 27 can be quickly disassembled. The electric push rod 574 pushes the V-shaped cutter 573 to move horizontally along the third sliding rod 571. The horizontally moving V-shaped cutter 573 cuts the nylon rope 26, so that the box body 27 and the bracket 51 are detached from the body 1 together to prevent the drone from falling.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heavy-load multi-rotor drone, characterized in that: The machine comprises a body (1), a cantilever (4) with a rotor is fixedly connected to the outside of the body (1), a box (27) for storing a hoisted load is arranged at the bottom of the body (1), a clamping mechanism (3) for preventing the box (27) from rotating is arranged at the outside of the body (1), a connecting mechanism (5) for quickly separating the box (27) from the body (1) is arranged at the top of the box (27), and a lifting mechanism (2) for preventing the hoisted load from swinging back and forth is arranged at the bottom of the body (1); The clamping mechanism (3) comprises connecting rods (31) symmetrically connected to the side of the machine body (1) for rotation, each connecting rod (31) being fixedly connected to a vertical rod (32) on the outside, and one end of the vertical rod (32) away from the connecting rod (31) being fixedly connected to a horizontal rod (33); The connecting mechanism (5) comprises a cross-shaped hanging bracket (51) attached to the upper surface of the box body (27), a plurality of sliding grooves (52) are provided at the bottom of the hanging bracket (51), a second sliding rod (53) is fixedly connected in each of the sliding grooves (52), a clamping block (54) is symmetrically slidably sleeved on the outside of the second sliding rod (53), a return spring (55) is sleeved on the outside of the second sliding rod (53) between two clamping blocks (54), a plurality of positioning holes (56) are provided on the upper surface of the box body (27), the positioning holes (56) and the clamping blocks (54) are matched with each other in a one-to-one correspondence, and a tangent assembly (57) for separating the box body (27) is provided on the upper surface of the hanging bracket (51); The box body (27) is provided with a limit assembly (38) inside to prevent the center of gravity of the box body (27) from shifting due to load movement; The clamping mechanism (3) further comprises levers (36) symmetrically fixedly connected to both ends of the connecting rod (31), and each lever (36) is fixedly connected to a roller (37) at one end away from the connecting rod (31), and the roller (37) is located directly above the box (27); The connecting rod (31) is sleeved with a torsion spring (34) on the outside, one end of the torsion spring (34) is fixedly connected to the side of the machine body (1), and the other end of the torsion spring (34) is fixedly connected to the side of the vertical rod (32); The limiting assembly (38) comprises a guide rod (382) that symmetrically slides horizontally and penetrates the side wall of the box body (27); one end of the guide rod (382) is fixedly connected to an outer plate (383); the other end of the guide rod (382) is fixedly connected to an inner plate (381); and the inner plate (381) is located inside the box body (27).

2. A heavy-load multi-rotor UAV according to claim 1, characterized in that: The wire cutting assembly (57) comprises third sliding bars (571) symmetrically fixedly connected to the upper surface of the hanging bracket (51); each of the third sliding bars (571) is slidably sleeved with a sliding sleeve (572) on the outside; a V-shaped cutter (573) is fixedly connected between the two sliding sleeves (572); an electric push rod (574) is fixedly connected to the upper surface of the hanging bracket (51); an output end of the electric push rod (574) is fixedly connected to a side of the V-shaped cutter (573) away from the blade.

3. A heavy-load multi-rotor UAV according to claim 1, characterized in that: The lifting mechanism (2) comprises a shell (21) fixedly connected to a groove at the bottom of the body (1), a mounting plate (22) being symmetrically fixedly connected inside the shell (21), a rotating shaft (23) being rotatably connected between the two mounting plates (22), a baffle (24) being symmetrically fixedly connected outside the rotating shaft (23), a nylon rope (26) being wound around the surface of the rotating shaft (23) between the two baffles (24), one end of the nylon rope (26) being fixedly connected to the rotating shaft (23), and the other end of the nylon rope (26) being fixedly connected to the upper surface of the hanger (51), and a cable arrangement assembly (28) for preventing the nylon rope (26) from becoming knotted is provided inside the shell (21).

4. A heavy-load multi-rotor UAV according to claim 3, characterized in that: The cable arrangement assembly (28) comprises a first sliding rod (282) fixedly connected between two mounting plates (22); the first sliding rod (282) is slidably sleeved with an L-shaped moving rod (283); a vertical section of the L-shaped moving rod (283) is threadedly connected with a reciprocating screw rod (281); two ends of the reciprocating screw rod (281) are respectively rotatably connected to the two mounting plates (22); a horizontal section of the L-shaped moving rod (283) is provided with a guide hole (284), and the nylon rope (26) passes through the guide hole (284).

5. A heavy-load multi-rotor UAV according to claim 4, characterized in that: One end of the rotating shaft (23) is fixedly connected to a first pulley (285), one end of the reciprocating screw rod (281) is fixedly connected to a second pulley (286), and the second pulley (286) and the first pulley (285) are connected in transmission via a synchronous belt (287).

6. A heavy-load multi-rotor UAV according to claim 3, characterized in that: A motor (25) is fixedly connected inside the housing (21), and an output end of the motor (25) is fixedly connected to an end of the rotating shaft (23) away from the first pulley (285).

7. A heavy-load multi-rotor UAV according to claim 1, characterized in that: A limiting block (35) is fixedly connected to the side of the machine body (1), and the limiting block (35) is located above the vertical rod (32).

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