A winch hanger structure of a transport unmanned aerial vehicle

Abstract

This invention relates to the field of winch technology, specifically a winch suspension structure for a transport drone. The structure includes a drone body, a mass block located in the center of a protective shell, and the mass block connected to the inner wall of the protective shell via a buffer connection assembly. When the suspension rope swings, it causes the mass block to move and overcome its inertia. Inside the protective shell, a pair of blocking components are provided. When the rope swings, the rotating plates on both sides simultaneously push against the upper and lower positions of the suspension rope, causing the rope to deflect. This winch suspension structure for the transport drone, by overcoming the inertia of the mass block with the swinging force of the rope, significantly reduces the swinging force on the upper end of the rope, resulting in less friction between the upper rope and the rope wound on the winch. This reduces wear between the upper end of the rope and the rope wound on the winch, thus improving the service life of the winch rope.

Description

Technical Field

[0001] This invention relates to the field of winch technology, specifically to a winch suspension structure for transporting unmanned aerial vehicles (UAVs). Background Technology

[0002] With the rapid development of drone technology, drones are increasingly widely used in cargo transportation, especially in scenarios such as medical supply delivery, express delivery services, and disaster relief. Rope descent winch technology, as one of the key technologies for precise cargo delivery by drones, enables accurate cargo delivery without requiring the drone to land, making it particularly suitable for scenarios with complex terrain, inconvenient transportation, or requiring precise delivery. In existing drone winch sling systems, the winch is typically installed at the bottom of the drone, with a rope wound around the winch drum. The free end of the rope passes through an outlet or guide structure and connects to a hook or other slinging device. The hook is used to hang the cargo, and the cargo is raised or lowered by retracting the winch.

[0003] During drone-borne sling transport, cargo is affected by factors such as changes in flight attitude, airflow disturbances, and wind forces, causing the winch sling to easily rotate and swing in the air. Existing technology typically includes a swivel joint (also called a rotary joint or universal joint) at the end of the winch rope (the end closest to the hook). The hook is connected to this swivel joint, which allows the hook to rotate freely relative to the rope. When the cargo rotates, the swivel joint rotates accordingly, releasing the torsional stress at the rope end. This prevents the torsional stress from being transmitted upwards along the rope, causing the cable itself to twist and knot. This structure effectively releases torque and prevents rope damage due to torsion. Meanwhile, existing technologies also offer solutions to address the problem of cable swaying in the air. For example, a meteorological detection drone with patent publication number CN121721750A discloses a structure including an airframe, an airborne meteorological station, and a cable retraction and deployment cabin. The cable retraction and deployment cabin is used to retract and deploy the detection cable and suppresses cable swaying through an active guidance and damping mechanism. To solve the problem of cable swaying caused by wind disturbance, a guidance and damping mechanism is added at the exit of the cable retraction and deployment cabin. Three pusher components and a pressure sensor arranged in a 120° circular array provide a center-recovering force to the detection cable through the pusher head. Through high-frequency, small-amplitude coordinated action, active damping and restoring force can be provided at the source of the cable swaying at the exit, suppressing large-amplitude low-frequency swaying into small-amplitude controllable vibration.

[0004] When the drone winch cable swings in the air, friction occurs between the upper end of the suspended cable and the cable wound on the winch, causing wear on the cable. This wear is particularly severe when the swing is frequent, reducing the service life of the suspended cable. Although the existing technology can correct the cable position to some extent through active drive, the cable is subjected to equal force at both ends during swing. When the lower end of the cable swings, friction still occurs between the upper end and the cable wound on the winch. Furthermore, the high-frequency pushing of the cable increases the frequency of friction between the upper end of the cable and the cable wound on the winch, leading to accelerated wear and thus reducing the cable's service life and the safety of the suspension. Summary of the Invention

[0005] The purpose of this invention is to provide a winch suspension structure for transporting drones, in order to solve the problem mentioned in the background art that when the suspension rope of the existing drone winch swings, friction occurs between the upper end of the rope and the rope wound on the winch, resulting in rope wear and reduced service life.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a winch suspension structure for a transport drone, comprising a drone body, a winch installed below the drone body, a suspension rope for suspending cargo wound on the winch, a protective shell connected below the winch, a pair of pulleys provided at the top of the protective shell, and the suspension rope passing over the pair of pulleys and then passing through the protective shell; The protective shell has a mass block in the middle inside. The mass block has a through hole in the center for the hanging rope to pass through. The mass block is connected to the inner wall of the protective shell through a buffer connection assembly. When the hanging rope swings, it will cause the mass block to move and needs to overcome the inertia of the mass block. Inside the protective shell, a pair of blocking components are provided on both sides of the suspension rope. The blocking components include support plates connected to the inner walls of both sides of the protective shell and rotating plates located on both sides of the suspension rope. The rotating plates are rotatably connected to the support plates. When the rotating plates on both sides swing, they can simultaneously push against the upper and lower positions of the suspension rope by rotating, causing the suspension rope to deflect.

[0007] Preferably, the protective shell is a hollow cylindrical structure with closed top and bottom. Smooth round holes for the hoisting rope to pass through are provided at the center of the upper and lower end faces of the protective shell. The upper end of the protective shell is fixedly connected to the winch shell through a connecting post.

[0008] Preferably, the upper end of the protective shell is provided with mounting plates on both sides of its circular hole. A pulley is mounted on the inner side of each mounting plate via a bracket, and the pulley on one of the mounting plates is located directly above the circular hole at the upper end of the protective shell. The hanging rope passes around the two pulleys in sequence and then enters the interior of the protective shell through the circular hole at the upper end of the protective shell.

[0009] Preferably, the back sides of the support plates on both sides are fixedly connected to the inner wall of the protective shell through connecting columns. The support plates and the rotating plate are connected by symmetrical telescopic springs. The support plates and the rotating plate are also connected by a connecting rod at the middle. One end of the connecting rod is fixedly connected to the surface of the support plate, and the other end of the connecting rod is hinged to the surface of the rotating plate through a hinge seat, so that the rotating plate can rotate around the center. The rotating plate is equipped with clamping heads at both the upper and lower ends of the side near the suspension rope, and the clamping heads have a U-shaped cross-section.

[0010] Preferably, the mass block is a solid high-density metal sphere, and a low-friction bushing is provided in the through hole at its center.

[0011] Preferably, the buffer connection assembly includes a plurality of damping rods evenly arranged on the outer periphery of the mass block, with the two ends of the damping rods respectively connected to the outer wall of the mass block and the inner wall of the protective shell; The mass block is provided with shock-absorbing blocks on at least two sides symmetrical about its central axis, which are connected to the inner wall of the protective shell for absorbing oscillating energy.

[0012] Preferably, the buffer connection assembly includes an annular slide rail surrounding the inner wall of the protective shell and slide rods symmetrically connected to both sides of the mass block. One end of the slide rod is fixedly connected to the outer wall of the mass block, and the other end is located in the slide rail. The slide rod is slidably connected to the slide rail, and the slide rod can move in the slide rail when the mass block swings.

[0013] Preferably, the end of the slide rod located inside the slide rail is provided with a friction block, the friction block being compatible with the cross-sectional shape of the slide rail and fitting against its inner wall.

[0014] Preferably, the buffer connection assembly includes two connecting shafts, one upper and one lower, connected at the center of the top of the mass block and the center of the inner side of the top of the protective shell. The ends of the connecting shafts are provided with U-shaped connectors, and a cross shaft is connected between the U-shaped connectors on the upper and lower connecting shafts. The center of the cross shaft between the connecting shaft and the U-shaped connector is provided with a through hole corresponding to the through hole on the mass block and the round hole on the protective shell.

[0015] Preferably, torsion springs are provided around both the upper and lower U-shaped connectors, and the upper and lower ends of the torsion springs are respectively connected to the outer walls of the upper and lower U-shaped connectors.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The winch suspension structure of the transport UAV has a mass block inside the protective shell below the winch. The suspension rope on the winch passes through the center of the mass block to lift the cargo. When the UAV swings due to changes in flight attitude and wind force, the rope will drive the mass block to move. Since the mass block has a large mass and significant inertia, when the rope tries to drive the mass block to move, the mass block will lag due to inertia. Therefore, the swing force of the rope needs to overcome the inertia of the mass block and consume most of the energy, which greatly reduces the swing force on the upper end of the rope, reduces the displacement of the upper end of the rope, and reduces the friction between the upper end of the rope and the rope wound on the winch. Thus, the wear between the upper end of the rope and the rope wound on the winch is reduced. At the same time, a buffer connection component is provided between the mass block and the protective shell to further consume the swing energy, which further reduces the swing force on the upper end of the rope and the resulting friction and wear between the upper end of the rope and the rope wound on the winch, and improves the service life of the winch rope.

[0017] (2) The winch suspension structure of the transport UAV has a pair of pulleys above the protective shell. The rope passes through the pulleys in sequence and then enters the protective shell. The winding of the pulleys prevents the force of the upper and lower sections of the rope from being directly transmitted, which can effectively reduce the impact of the swing of the lower rope on the upper rope. At the same time, there is also a blocking component inside the protective shell. When the flight attitude of the UAV changes, the rotating plates on both sides of the rope will tilt synchronously due to inertia and the action of the extension spring. The clamping heads at the upper and lower ends of the rotating plates on both sides can push against the upper and lower positions of the rope section located at the rotating plate, causing the rope section at the rotating plate to deflect at the upper and lower parts. This isolates the force of the upper and lower sections of the rope, and prevents the swing of the lower rope from being continuously transmitted to the upper rope. This reduces the friction between the upper rope and the rope wound in the winch, thereby reducing wear. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the winch suspension structure for a transport drone according to the present invention; Figure 2 This is a schematic diagram of the protective shell structure of a winch suspension structure for a transport drone according to the present invention; Figure 3 This is a front view schematic diagram of the protective shell structure of the winch suspension structure of a transport drone according to the present invention; Figure 4This is a schematic cross-sectional view of the internal structure of the protective shell of a winch suspension structure for a transport drone according to the present invention. Figure 5 This invention relates to a winch suspension structure for transporting unmanned aerial vehicles. Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the barrier component of the winch suspension structure of a transport drone according to the present invention acting on the suspension rope; Figure 7 This is a schematic diagram of the internal cross-sectional structure of the protective shell in Embodiment 2 of the present invention; Figure 8 This is a schematic cross-sectional view of the buffer connection component in Embodiment 2 of the present invention; Figure 9 As in Embodiment 2 of the present invention Figure 8 Enlarged structural diagram at point B in the diagram; Figure 10 This is a schematic diagram of the internal cross-sectional structure of the protective shell in Embodiment 3 of the present invention; Figure 11 This is a schematic diagram of the connection structure between the connecting shaft, the mass block, and the protective shell in Embodiment 3 of the present invention; Figure 12 This is a schematic diagram of the connecting shaft structure in Embodiment 3 of the present invention; Figure 13 This is a schematic diagram of the upper end of an existing drone winch suspension rope when it swings.

[0019] In the diagram: 1. UAV body; 2. Winch; 3. Suspension rope; 4. Protective shell; 5. Mounting plate; 6. Pulley; 7. Mass block; 8. Buffer connection assembly; 81. Damping rod; 82. Shock absorber block; 83. Slide rail; 84. Slide rod; 841. Friction block; 85. Connecting shaft; 86. Torsion spring; 9. Barrier assembly; 91. Support plate; 92. Rotating plate; 93. Clamping head; 94. Telescopic spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 Please see Figure 1-6This invention provides a technical solution: a winch suspension structure for a transport drone, comprising a drone body 1, a winch 2 installed below the drone body 1, a suspension rope 3 for suspending cargo wound on the winch 2, the winch 2 being an existing drone winch, the suspension rope 3 being driven by a motor to descend or ascend, the end of the suspension rope 3 being provided with a hook for suspending cargo, a swivel joint being provided between the hook and the suspension rope 3 to prevent the suspension rope 3 from twisting due to the cargo rotating in the air, a protective shell 4 being connected below the winch 2, the top of the protective shell 4 being provided with a pair of pulleys 6, the suspension rope 3 passing over the pair of pulleys 6 and then passing through the protective shell 4.

[0022] Specifically, the protective shell 4 is a hollow cylindrical structure with closed top and bottom. The center of the upper and lower end faces of the protective shell 4 is provided with smooth round holes for the hoisting rope 3 to pass through. The edges of the round holes are smoothly chamfered to prevent the sharp edges of the round holes from causing excessive friction on the hoisting rope 3 and thus causing wear. The upper end of the protective shell 4 is fixedly connected to the outer shell of the winch 2 through a connecting column. The connecting column is integrally formed with the top of the protective shell 4. The connecting column can be fixed to the outer shell of the winch 2 by welding or bolts and other fasteners. Furthermore, the upper end of the protective shell 4 is provided with mounting plates 5 on both sides of its circular hole. A pulley 6 is mounted on the inner side of each mounting plate 5 via a bracket. The pulley 6 on one mounting plate 5 is positioned directly above the circular hole at the upper end of the protective shell 4, while the pulley 6 on the other mounting plate 5 is positioned lower than the pulley 6 directly above the circular hole at the upper end of the protective shell 4. The hoisting rope 3 passes around the two pulleys 6 in sequence and then enters the interior of the protective shell 4 through the circular hole at the upper end of the protective shell 4. The hoisting rope 3 descends from the winch 2, first passing over the lower pulley 6, then over the higher pulley 6, and finally... Inserted into the protective shell 4, the hoisting rope 3 is wound by the pulley 6, so that the swing force on the lower hoisting rope 3 is not directly transmitted to the upper hoisting rope 3. Thus, when the lower end of the hoisting rope 3 swings, the upper hoisting rope 3 will not swing along with it or can swing less. Therefore, the friction between the upper end of the hoisting rope 3 and the hoisting rope 3 wound on the winch 2 can be reduced. Since the surface of the hoisting rope 3 is relatively rough, long-term and high-frequency friction between the hoisting ropes 3 will cause greater wear on the hoisting rope 3. Therefore, reducing the friction between the hoisting ropes 3 can effectively reduce the wear of the hoisting rope 3 and improve the service life of the hoisting rope 3. The protective shell 4 has a mass block 7 in the middle inside. The mass block 7 has a through hole in the center for the suspension rope 3 to pass through. The mass block 7 is connected to the inner wall of the protective shell 4 through a buffer connection assembly 8. When the suspension rope 3 swings, it will cause the mass block 7 to move and overcome the inertia of the mass block 7. The mass block 7 is a solid high-density metal sphere. The mass block 7 can be made of tungsten alloy. The through hole in the center of the mass block 7 has a low-friction bushing. The low-friction bushing can be a ceramic ring bushing. The ceramic ring bushing has a smooth surface and low friction, which can ensure that the suspension rope 3 slides smoothly in the mass block 7 and avoid wear. When the suspension rope 3 swings, it causes the rope segment passing through the mass block 7 to have a rapid motion tendency, which in turn causes the mass block 7 to also have a motion tendency. Because the mass block 7 has a large mass and significant inertia, when the mass block 7 has a motion tendency, it will first maintain its original stationary or moving state. When the suspension rope 3 tries to pull it, the mass block 7 will have a lag due to inertia. As a result, most of the swing force generated by the suspension rope 3 will be consumed in overcoming the inertia of the mass block 7, and cannot be transmitted to the upper suspension rope 3 through a rigid path. This prevents the upper suspension rope 3 from swinging too much, reduces the friction between it and the suspension rope 3 wound on the winch 2, and reduces the wear of the suspension rope 3.

[0023] In this embodiment, the buffer connection assembly 8 includes a plurality of damping rods 81 uniformly arranged on the outer periphery of the mass block 7. The two ends of the damping rods 81 are respectively connected to the outer wall of the mass block 7 and the inner wall of the protective shell 4. When the suspension rope 3 swings, the damping rods 81 on the outer periphery of the mass block 7 can further increase the energy required to drive the mass block 7 to move, so that the force of the suspension rope 3 swinging is further consumed, thereby further weakening the swing force transmitted to the upper end of the suspension rope 3, reducing the wear caused by friction between the suspension rope 3 and the suspension rope 3 wound on the winch 2. At least two sides of the mass block 7 are symmetrical about its central axis and are provided with shock absorbers 82 connected to the inner wall of the protective shell 4 for absorbing swing energy. Multiple sets of symmetrical shock absorbers 82 are provided on the outer side of the mass block 7. The shock absorbers 82 can be rubber springs to absorb the small swing energy of the mass block 7 and prevent its long-term oscillation.

[0024] Furthermore, a pair of blocking components 9 are provided inside the protective shell 4 on both sides of the hanging rope 3. The blocking components 9 include a support plate 91 connected to the inner walls of both sides of the protective shell 4 and a rotating plate 92 located on both sides of the hanging rope 3. The rotating plate 92 is rotatably connected to the support plate 91. When the rotating plate 92 on both sides swings, it can push the upper and lower positions of the hanging rope 3 simultaneously by rotating, causing the hanging rope 3 to deflect and interrupting the force on the upper and lower ends of the hanging rope 3. The swing generated by the lower end of the rope cannot be continuously and directly transmitted to the upper end, thereby reducing the friction between the upper end of the hanging rope 3 and the rope wound in the winch 2, and reducing the wear of the upper end of the hanging rope 3. Specifically, the back sides of the support plates 91 on both sides are fixedly connected to the inner wall of the protective shell 4 via connecting columns. Symmetrical telescopic springs 94 are connected between the support plates 91 and the rotating plate 92. The telescopic springs 94 connected between the support plates 91 and the rotating plate 92 on both sides are made of the same material and have the same elastic coefficient. When the rotating plate 92 is kept vertical, the telescopic springs 94 between the support plates 91 and the rotating plate 92 are in their natural length state and are not subject to additional tensile or compressive forces. The support plates 91 and the rotating plate 92 are also connected by a connecting rod in the middle. One end of the connecting rod is fixedly connected to the surface of the support plate 91, and the other end of the connecting rod is hinged to the surface of the rotating plate 92 via a hinge seat, so that the rotating plate 92 can rotate around the center. The upper and lower ends of the rotating plate 92 near the hanging rope 3 are provided with clamping heads 93, and the clamping heads 93 have a U-shaped cross-section. When the drone body 1 changes its flight attitude or accelerates or decelerates rapidly, the suspension rope 3 will swing due to inertia and tilt. At the same time, the rotating plate 92 will also tilt due to instantaneous inertia. When the rotating plates 92 on both sides tilt, they will rotate around the hinge point with their respective connecting rods in the tilting direction. When the rotating plates 92 on both sides rotate, the corresponding upper and lower clamping heads 93 will push against the upper and lower parts of the suspension rope 3 located on the rotating plate 92 section, causing the upper and lower parts of the suspension rope 3 to deflect. For example, when the rotating plate 92 tilts to the right, the upper clamping head 93 of the left rotating plate 92 will be against the suspension rope 3 and push against it, while the lower clamping head 93 will move away from the suspension rope 3. The holding head 93 moves away from the suspension rope 3, and the clamping head 93 at the lower end moves against the suspension rope 3 and pushes against it, thus creating a pushing action at both ends of the suspension rope 3. This causes the suspension rope 3 to deflect, thereby interrupting the force on the suspension rope 3. The swinging force of the lower suspension rope 3 cannot be effectively and continuously transmitted to the upper suspension rope 3, thus reducing the impact of the swinging force on the upper suspension rope 3 or weakening the swinging force it receives. This reduces the friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2, reducing the wear of the suspension rope 3. After the swing ends, the rotating plates 92 on both sides will return to their initial positions under the restoring force of the telescopic spring 94, preparing for the next swing.

[0025] Example 2 Please see Figure 7-9The difference between this embodiment and the above embodiment is that the buffer connection assembly 8 includes an annular slide rail 83 surrounding the inner wall of the protective shell 4 and slide rods 84 symmetrically connected to both sides of the mass block 7. One end of the slide rod 84 is fixedly connected to the outer wall of the mass block 7, and the other end is located in the slide rail 83. The slide rod 84 is slidably connected to the slide rail 83. When the mass block 7 swings, the slide rod 84 can move in the slide rail 83. When the suspension rope 3 swings, after overcoming the inertia of the mass block 7, the mass block 7 will rotate in the slide rail 83 through the slide rod 84 after being subjected to the remaining swing force of the suspension rope 3, thereby buffering the remaining swing force of the suspension rope 3, avoiding the rigid continuous transmission of the swing force at the lower end of the suspension rope 3 to the upper end, weakening the swing force on the upper end of the suspension rope 3, and reducing the friction and wear between the upper ropes. Furthermore, the end of the slide rod 84 located inside the slide rail 83 is provided with a friction block 841. The friction block 841 matches the cross-sectional shape of the slide rail 83 and is in contact with its inner wall. The friction block 841 can be made of rubber. When the mass block 7 is rotated under force, the sliding of the slide rod 84 in the slide rail 83 is affected by the resistance of the friction block 841, so that the force from the swing of the suspension rope 3 on the mass block 7 is buffered and consumed more quickly and in greater quantities, thereby further reducing the swing force transmitted from the lower end of the suspension rope 3 to the upper end, and further reducing the friction and wear between the upper ropes.

[0026] Example 3 Please see Figure 10-12 The difference between this embodiment and the two embodiments mentioned above is that the buffer connection assembly 8 includes two upper and lower connecting shafts 85 connected at the top center of the mass block 7 and the inner center of the top of the protective shell 4. The ends of the connecting shafts 85 are provided with U-shaped connectors. The U-shaped connectors on the upper and lower connecting shafts 85 are arranged opposite to each other, and a cross shaft is connected between the U-shaped connectors on the upper and lower connecting shafts 85. The connection of the cross shaft makes the upper and lower connecting shafts 85 form a universal joint structure. The center of the cross shaft between the connecting shafts 85 and the U-shaped connectors is provided with through holes corresponding to the through holes on the mass block 7 and the round holes on the protective shell 4. The hanging rope 3 can pass through the through holes on the connecting shafts 85 and the U-shaped connectors. When the suspension rope 3 swings, after overcoming the inertia of the mass block 7, the mass block 7 will swing through the universal joint structure formed by the upper and lower connecting shafts 85 after being subjected to the remaining swing force of the suspension rope 3. Thus, the remaining swing force still needs to overcome the gravity borne by the mass block 7 due to the swing, thereby further consuming and buffering the swing force, so that the swing force on the suspension rope 3 cannot be rigidly and continuously transmitted to the upper end, reducing the friction and wear between the upper ropes. Furthermore, torsion springs 86 are provided around both the upper and lower U-shaped connectors. The upper and lower ends of the torsion springs 86 are respectively connected to the outer walls of the upper and lower U-shaped connectors. When the mass block 7 is subjected to the swinging force of the hanging rope 3, the torsion springs 86 around the upper and lower U-shaped connectors will apply resistance to the swinging force on the mass block 7, so that the swinging force exerted by the hanging rope 3 on the mass block 7 is further consumed, thereby further reducing the friction and wear between the upper ropes.

[0027] Working Principle: When using the winch sling structure of this transport drone, the sling rope 3 on the winch 2 of the drone body 1 first passes through the two pulleys 6 on the protective shell 4 and then through the protective shell 4, slinging the cargo through the hook at the bottom. During cargo transport, when the sling rope 3 swings due to changes in the flight attitude of the drone body 1 or the influence of wind, the swing of the sling rope 3 will act on the mass block 7, causing the mass block 7 to move. Due to the inertia of the mass block 7, the sling rope 3 must first overcome the inertia of the mass block 7. During this process, most of the swing force of the sling rope 3 will be consumed. This reduces the swaying force transmitted from the lower end of the suspension rope 3 to the upper end, resulting in a smaller swaying force on the upper suspension rope 3. Consequently, it does not produce a large displacement at the winch 2, and the friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2 is also reduced. This decreases the wear caused by friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2. At the same time, because the upper suspension rope 3 passes around the pulley 6 in sequence, the swaying force transmitted to the suspension rope 3 cannot be directly and continuously transmitted at this point. Therefore, the friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2 is further reduced, further reducing wear.

[0028] When the swinging force generated by the suspension rope 3 acts on the mass block 7, after overcoming the inertial consumption caused by the mass block 7's own mass, the remaining swinging force will be further buffered and consumed by the buffer connection component 8 on the mass block 7, so that the swinging force transmitted to the upper suspension rope 3 is continuously weakened, thereby reducing the friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2 caused by the swinging, and further reducing the wear between the upper ropes. When the drone body 1 tilts, causing the suspension rope 3 to swing, the blocking component 9 inside the protective shell 4 will act on the suspension rope 3. At the moment the drone body 1 tilts, the rotating plates 92 located on both sides of the suspension rope 3 will also tilt accordingly due to inertia. When the rotating plates 92 tilt, they will rotate around the hinge of their respective middle connecting rods. When the rotating plates 92 rotate, the corresponding upper and lower clamping heads 93 on the rotating plates 92 will push against the suspension rope 3, causing the suspension rope 3 section located at the rotating plate 92 to bend vertically, interrupting the force on the upper and lower ends of the suspension rope 3. This prevents the swinging force generated by the lower suspension rope 3 from being continuously transmitted to the upper suspension rope 3, thereby weakening the swinging force on the upper suspension rope 3. Under the action of the upper mass block 7, the force is further reduced, thereby reducing the friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2 caused by the swing and the wear caused by the friction.

[0029] When the suspension rope 3 swings, the force generated by the lower suspension rope 3 is gradually consumed and weakened when it is transmitted to the upper suspension rope 3 through the force isolation of the blocking component 9, the inertial energy dissipation of the mass block 7, the buffer energy absorption of the buffer connection component 8, and the force diversion of the pulley 6. This effectively reduces the friction between the upper suspension rope 3 and the suspension rope 3 wound on the winch 2 caused by the swing, reduces the wear of the suspension rope 3, and improves the service life of the suspension rope 3.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A winch sling structure for transporting unmanned aerial vehicles (UAVs), comprising a UAV body (1), a winch (2) installed below the UAV body (1), and a sling rope (3) for slinging cargo wound on the winch (2), characterized in that: The winch (2) is connected to a protective shell (4) below. A pair of pulleys (6) are provided at the top of the protective shell (4). The hoisting rope (3) passes around the pair of pulleys (6) and then passes into the protective shell (4). The protective shell (4) has a mass block (7) in the middle inside. The mass block (7) has a through hole in the center inside for the hanging rope (3) to pass through. The mass block (7) is connected to the inner wall of the protective shell (4) through a buffer connection assembly (8). When the hanging rope (3) swings, it will drive the mass block (7) to generate a motion tendency and needs to overcome the inertia of the mass block (7). Inside the protective shell (4), a pair of blocking components (9) are provided on both sides of the hanging rope (3). The blocking components (9) include a support plate (91) connected to the inner walls of both sides of the protective shell (4) and a rotating plate (92) located on both sides of the hanging rope (3). The rotating plate (92) is rotatably connected to the support plate (91). When the rotating plate (92) on both sides swings, it can push the hanging rope (3) at both the upper and lower positions simultaneously by rotating, causing the hanging rope (3) to deflect.

2. The winch suspension structure for transporting unmanned aerial vehicles according to claim 1, characterized in that: The protective shell (4) is a hollow cylindrical structure with closed top and bottom. The center of the upper and lower end faces of the protective shell (4) is provided with smooth round holes for the hanging rope (3) to pass through. The upper end of the protective shell (4) is fixedly connected to the outer shell of the winch (2) through a connecting column.

3. The winch suspension structure for transporting unmanned aerial vehicles according to claim 2, characterized in that: The upper end of the protective shell (4) is provided with mounting plates (5) on both sides of its circular hole. A pulley (6) is installed on the inner side of the mounting plates (5) on both sides through a bracket. The pulley (6) on one side of the mounting plate (5) is located directly above the circular hole at the upper end of the protective shell (4). The hanging rope (3) passes around the two pulleys (6) in sequence and then passes through the circular hole at the upper end of the protective shell (4) into the interior of the protective shell (4).

4. The winch suspension structure for transporting unmanned aerial vehicles according to claim 3, characterized in that: The back sides of the support plates (91) on both sides are fixedly connected to the inner wall of the protective shell (4) through connecting columns. The support plates (91) and the rotating plate (92) are connected by symmetrical telescopic springs (94). The support plates (91) and the rotating plate (92) are also connected by a connecting rod in the middle. One end of the connecting rod is fixedly connected to the surface of the support plate (91), and the other end of the connecting rod is hinged to the surface of the rotating plate (92) through a hinge seat, so that the rotating plate (92) can rotate around the center. The rotating plate (92) is provided with clamping heads (93) at both the upper and lower ends of the side near the hanging rope (3), and the clamping head (93) has a U-shaped cross-section.

5. The winch suspension structure for transporting unmanned aerial vehicles according to claim 3, characterized in that: The mass block (7) is a solid high-density metal sphere, and a low-friction bushing is provided in the through hole in the center of its interior.

6. The winch suspension structure for transporting unmanned aerial vehicles according to claim 5, characterized in that: The buffer connection assembly (8) includes a plurality of damping rods (81) evenly arranged on the outer periphery of the mass block (7), and the two ends of the damping rods (81) are respectively connected to the outer wall of the mass block (7) and the inner wall of the protective shell (4). The mass block (7) is provided with shock-absorbing blocks (82) on at least two sides symmetrical about its central axis, which are connected to the inner wall of the protective shell (4) for absorbing oscillating energy.

7. The winch suspension structure for transporting unmanned aerial vehicles according to claim 5, characterized in that: The buffer connection assembly (8) includes an annular slide rail (83) surrounding the inner wall of the protective shell (4) and slide rods (84) symmetrically connected to both sides of the mass block (7). One end of the slide rod (84) is fixedly connected to the outer wall of the mass block (7), and the other end is located in the slide rail (83). The slide rod (84) is slidably connected to the slide rail (83). When the mass block (7) swings, the slide rod (84) can move in the slide rail (83).

8. The winch suspension structure for transporting unmanned aerial vehicles according to claim 7, characterized in that: The end of the slide rod (84) located inside the slide rail (83) is provided with a friction block (841), the friction block (841) is in line with the cross-sectional shape of the slide rail (83) and fits against its inner wall.

9. The winch suspension structure for transporting unmanned aerial vehicles according to claim 5, characterized in that: The buffer connection assembly (8) includes two upper and lower connecting shafts (85) connected at the top center of the mass block (7) and the top inner center of the protective shell (4). The ends of the connecting shafts (85) are provided with U-shaped connectors, and a cross shaft is connected between the U-shaped connectors on the upper and lower connecting shafts (85). The center of the cross shaft between the connecting shaft (85) and the U-shaped connector is provided with through holes corresponding to the through holes on the mass block (7) and the round holes on the protective shell (4).

10. The winch suspension structure for transporting unmanned aerial vehicles according to claim 9, characterized in that: The upper and lower U-shaped connectors are provided with torsion springs (86) around their perimeter, and the upper and lower ends of the torsion springs (86) are respectively connected to the outer walls of the upper and lower U-shaped connectors.

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