Unmanned aerial vehicle combined hoisting system suitable for bearing large weight range

Abstract

The unmanned aerial vehicle combined hoisting system suitable for bearing the large weight range comprises a bearing mechanism, a clamping mechanism and a mounting frame, the bearing mechanism comprises a fixing frame, a first adjusting frame and a second adjusting frame, and the first adjusting frame and the second adjusting frame are movably arranged on the left side and the right side of the fixing frame through limiting mechanisms; u-shaped frames are fixedly arranged on the top of the first adjusting frame and the top of the second adjusting frame correspondingly, a blocking mechanism is arranged in one end of the first adjusting frame and one end of the second adjusting frame, and the blocking mechanism comprises a movable rod and a stretching plate. The first adjusting frame and the second adjusting frame can be transversely adjusted through the transmission mechanism, so that the containing space of the fixing frame, the first adjusting frame and the second adjusting frame is increased, the system can bear objects in a large weight range, the transportation efficiency of the objects is improved, and more objects can be conveniently transported for disaster area rescue, emergency material delivery and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) lifting and loading technology, and in particular to a UAV combined lifting system suitable for carrying a large weight range. Background Art

[0002] Drone load transport can achieve point-to-point and end-to-end straight-line flight, and quickly deliver materials to the destination. It is especially suitable for complex terrain and extreme environments, such as transporting power equipment in mountainous areas, delivering emergency materials, delivering agricultural products, and rescuing disaster areas. It can also reduce dependence on ground transportation, avoid road repair and maintenance costs, and reduce the risk of direct participation of personnel.

[0003] In existing technology, drones typically use a load-carrying frame mounted on their underside, which is then hoisted onto a rectangular hoisting member. The frame, which includes a load-carrying arm, a crossbeam, and bolts, is secured to the drone. However, in practice, drones are often subject to structural limitations, limiting the size of the frame and preventing it from being expanded to carry a wide range of weights. This results in a limited number of items being transported per trip, reducing transport efficiency and hindering disaster relief efforts and emergency supplies delivery.

[0004] To this end, the present invention provides a combined lifting system for unmanned aerial vehicles (UAVs) suitable for carrying a large weight range. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a drone combination lifting system suitable for carrying a larger weight range to solve the problems raised in the above background technology. The present invention can adjust the first adjustment frame and the second adjustment frame laterally through the transmission mechanism, thereby increasing the accommodation space of the fixed frame, the first adjustment frame and the second adjustment frame, and can increase the system's ability to carry items in a larger weight range, improve the transportation efficiency of items, and facilitate the transportation of more items for disaster rescue and emergency material delivery, etc.

[0006] In order to achieve the above-mentioned object, the present invention is realized through the following technical solution: A combined lifting system for unmanned aerial vehicles suitable for carrying a large weight range includes a carrying mechanism, a clamping mechanism and a mounting frame, the carrying mechanism includes a fixed frame, a first adjusting frame and a second adjusting frame, the first adjusting frame and the second adjusting frame are movably arranged on the left and right sides of the fixed frame through a limiting mechanism, the top of the first adjusting frame and the second adjusting frame are fixedly provided with a U-shaped frame, one end of the first adjusting frame and the second adjusting frame is internally provided with a blocking mechanism, the blocking mechanism includes a movable rod and a stretching plate, the clamping mechanism includes a mounting groove and a top plate, the mounting groove is symmetrically opened inside the two ends of the top plate, the internal limit sliding installation of the clamping rod of the mounting groove, the bottom of the two ends of the top plate is symmetrically opened with a first slide groove, the top of the U-shaped frame is limited and slidably installed inside the first slide groove, a tension spring is fixedly installed between the top of the U-shaped frame and the bottom end of the clamping rod, the two ends of the mounting frame are symmetrically opened inside the through groove, the clamping rod is clamped and installed inside the through groove, and a pressure sensor is fixedly provided on the inner wall of the through groove.

[0007] On one side, fixing rods are symmetrically fixed at the front and rear ends of the top of the fixing frame, the top ends of the fixing rods are fixedly connected to the bottom of the top plate, and the fixing rods are arranged in the middle position of the U-shaped frames on both sides.

[0008] On one side, a transmission mechanism is provided between the fixed rod and the U-shaped frames on both sides. The transmission mechanism includes a fixed frame, a first cross bar and a second cross bar. The fixed frame is fixedly mounted on the outer walls of the front and rear fixed rods.

[0009] On one side, one end of the first cross bar and the second cross bar are fixedly connected to the outer walls of the U-shaped frames on both sides, and the other ends of the first cross bar and the second cross bar are limitedly slidably installed inside the fixed frame, and the first cross bar is arranged below the second cross bar.

[0010] On one side, racks are fixedly installed at the top of the first cross bar and the bottom of the second cross bar, and gears are rotatably installed inside the fixed frame and between the fixed rods. The gears and racks are engaged with each other, and tightening knobs are screwed on the top and bottom ends of the fixed frame. The inner ends of the tightening knobs are in contact with the first cross bar and the second cross bar.

[0011] On the further side, the limiting mechanism includes a second slide groove and a second slider. The second slide groove is symmetrically opened inside the outer wall at both ends of the fixed frame. The second slider is fixedly arranged on the front and rear inner walls of one end of the first adjustment frame and the second adjustment frame. The second slider is limited and slidably installed inside the second slide groove.

[0012] On the further side, shaft rods are symmetrically fixed at the front and rear ends of the movable rod, and the shaft rods are rotatably installed inside the front and rear ends of the first adjustment frame and the second adjustment frame. Limit rods are equidistantly fixed at the top of the movable rod, and the cross-sectional shape of the limit rods is "T"-shaped.

[0013] On one side, the limit rod is slidingly installed inside the bottom end of the stretching plate, and an inner spring is fixedly installed on the outer side of the limit rod corresponding to the inside of the stretching plate. A baffle is fixedly provided at the top of the first adjustment frame and the second adjustment frame corresponding to the position of the stretching plate.

[0014] On one side, the mounting frame is in a "U" shape, and fixing holes are symmetrically opened inside both ends of the mounting frame, and the mounting frame is fitted on the top of the top plate.

[0015] On one side, the pressure sensor is in contact with the side wall of the clamping rod, the top of the clamping rod is provided with a slope, the cross-sectional shape of the clamping rod is "L"-shaped, and support rods are fixed longitudinally inside the fixing frame, the first adjustment frame and the second adjustment frame.

[0016] Beneficial effects of the present invention: The present invention is a combined lifting system for unmanned aerial vehicles that is suitable for carrying a large weight range, including a fixing frame, a first adjusting frame, a second adjusting frame, a top plate, a mounting frame, a clamping rod, a mounting groove, a fixing hole, a fixing rod, a U-shaped frame, a transmission mechanism, a blocking mechanism, a first slide groove, a first cross bar, a second cross bar, a fixing frame, a gear, a rack, a movable rod, a stretching plate, a baffle, a limiting mechanism, a pressure sensor, a tension spring, a second slide groove, a second slider, a tightening knob, and a limiting rod.

[0017] 1. The combined lifting system for drones that carry a large weight range can fix the mounting bracket to the bottom of the drone through the fixing holes. The system installation position, movable and adjustable clamping rods are provided on both sides of the inner part of the top plate, so that when the top plate and the mounting bracket are fitted together, the clamping rods can be squeezed by the inclined surface to clamp the clamping rods into the inner part of the through groove, which is convenient for fixing the top plate and the mounting bracket and facilitating the rapid assembly and installation of the system; and a tension spring is installed between the U-shaped frame and the clamping rod, which can fix the clamping rod through the tension spring when the U-shaped frame moves, thereby improving the stability of the clamping rod, and at the same time, a pressure sensor is provided between the clamping rod and the through groove, so that the extrusion force between the clamping rod and the through groove can be conveniently detected, thereby ensuring the stability between the clamping rod and the mounting bracket.

[0018] 2. The combined lifting system for drones suitable for carrying a large weight range can simultaneously move the first adjusting frame and the second adjusting frame to both sides of the fixed frame through the action of transmission mechanisms such as gears, racks, the first cross bar and the second cross bar, which is convenient for increasing the internal space size of the carrying mechanism, improving the capacity of the carrying mechanism, and conveniently carrying objects in a large weight range, and convenient for fast and efficient transportation of objects; by arranging limiting mechanisms such as the second slide groove and the second slider between the fixed frame, the first adjusting frame and the second adjusting frame, the stability between the first adjusting frame, the second adjusting frame and the fixed frame can be improved, and the objects can be supported by the support rod, the fixed frame, the first adjusting frame and the second adjusting frame; by turning the tightening knob, the first cross bar and the second cross bar can be squeezed and fixed, which can improve the stability of the carrying mechanism.

[0019] 3. The movable rod of the combined lifting system for drones that carries a larger weight range can be rotated inside one end of the first adjustment frame and the second adjustment frame through the shaft rod, and the stretching plate is driven to rotate and adjust through the limit rod. The movable rod and the stretching plate can be adjusted to a horizontal state, which is convenient for taking and placing items on the inner side of the carrying mechanism; the movable rod and the stretching plate can also be adjusted to a vertical state, and the stretching plate can be limited by the baffle so that the stretching plate can block the outside of the item, thereby improving the stability of the item and preventing the transported item from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a combined lifting system for UAVs suitable for carrying a large weight range according to the present invention; Figure 2 This is a front cross-sectional view of a combined lifting system for unmanned aerial vehicles (UAVs) suitable for carrying a wide range of weights according to the present invention; Figure 3 The present invention is a combined lifting system for unmanned aerial vehicles suitable for carrying a large weight range. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial structural breakdown diagram of a combined lifting system for UAVs suitable for carrying a large weight range according to the present invention; Figure 5 This is a cross-sectional view of the top plate of a combined lifting system for UAVs suitable for carrying a large weight range according to the present invention; Figure 6 This is an assembly structure diagram of a fixed frame, a first adjustment frame, and a second adjustment frame of a combined lifting system for a UAV suitable for carrying a large weight range according to the present invention; Figure 7 This is a structural diagram of the transmission mechanism of a combined lifting system for UAVs suitable for carrying a large weight range according to the present invention; Figure 8This is a structural diagram of a blocking mechanism of a combined lifting system for UAVs suitable for carrying a large weight range according to the present invention; In the figure: 1. fixed frame; 2. first adjustment frame; 3. second adjustment frame; 4. top plate; 5. mounting frame; 6. clamping rod; 7. mounting groove; 8. fixing hole; 9. fixing rod; 10. U-shaped frame; 11. transmission mechanism; 12. blocking mechanism; 13. first slide groove; 14. first cross bar; 15. second cross bar; 16. fixed frame; 17. gear; 18. rack; 19. movable rod; 20. stretching plate; 21. baffle; 22. limiting mechanism; 23. pressure sensor; 24. tension spring; 25. second slide groove; 26. second slider; 27. tightening knob; 28. limiting rod. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figures 1 to 8 The present invention provides a technical solution: a combined lifting system for a drone suitable for carrying a large weight range, including a carrying mechanism, a clamping mechanism and a mounting frame 5, the carrying mechanism including a fixed frame 1, a first adjusting frame 2 and a second adjusting frame 3, the first adjusting frame 2 and the second adjusting frame 3 are movably arranged on the left and right sides of the fixed frame 1 through a limiting mechanism 22, the top of the first adjusting frame 2 and the second adjusting frame 3 are fixedly provided with a U-shaped frame 10, one end of the first adjusting frame 2 and the second adjusting frame 3 is internally provided with a blocking mechanism 12, the blocking mechanism 12 includes a movable rod 19 and a stretching plate 20, the clamping mechanism includes a mounting groove 7 and a top plate 4, the mounting groove 7 is symmetrically opened inside the two ends of the top plate 4, the internal limiting sliding installation of the mounting groove 7 is a clamping rod 6, the bottom of the two ends of the top plate 4 is symmetrically provided with a first slide groove 13, the top of the U-shaped frame 10 is slidingly limited and installed in the first slide groove 13 The U-shaped frame 10 is fixed with a tension spring 24 between the top end and the bottom end of the clamping rod 6, and the two ends of the mounting frame 5 are symmetrically provided with through grooves, and the clamping rod 6 is clamped and installed in the through groove. A pressure sensor 23 is fixed on the inner wall of the through groove. When the top plate 4 is spliced ​​with the bottom of the mounting frame 5, the clamping rod 6 can be clamped with each other through the through groove under the tension of the tension spring 24, and by lateral movement of the U-shaped frame 10, the U-shaped frame 10 can continue to stretch the tension spring 24, so that the tension spring 24 generates tension on the clamping rod 6, which is convenient for limiting the clamping rod 6, thereby ensuring the stability between the clamping rod 6 and the mounting frame 5. The pressure sensor 23 can detect the extrusion force between the clamping rod 6 and the through groove to avoid the loosening of the clamping rod 6 without being discovered, thereby ensuring the stability between the carrying mechanism and the drone, and facilitating the transportation of items.

[0023] In this embodiment, the front and rear ends of the top of the fixing frame 1 are symmetrically fixed with fixing rods 9, the top of the fixing rod 9 is fixedly connected to the bottom of the top plate 4, the fixing rod 9 is arranged in the middle position of the U-shaped frame 10 on both sides, and a transmission mechanism 11 is provided between the fixing rod 9 and the U-shaped frames 10 on both sides. The transmission mechanism 11 includes a fixing frame 16, a first cross bar 14 and a second cross bar 15. The fixing frame 16 is fixedly mounted on the outer walls of the front and rear fixing rods 9, one end of the first cross bar 14 and the second cross bar 15 are respectively fixedly connected to the outer walls of the U-shaped frames 10 on both sides, and the first cross bar 1 4 and the other end of the second cross bar 15 are limitedly slidably installed in the interior of the fixed frame 16, the first cross bar 14 is arranged below the second cross bar 15, and a rack 18 is fixedly provided on the top of the first cross bar 14 and the bottom of the second cross bar 15. A gear 17 is rotatably installed between the interior of the fixed frame 16 and the fixed rod 9, and the gear 17 and the rack 18 are meshed with each other. A fastening knob 27 is screwed on the top and bottom ends of the fixed frame 16, and the inner end of the fastening knob 27 is in contact with the first cross bar 14 and the second cross bar 15. The limiting mechanism 22 includes a second slide groove 25 and a first The second slider 26 and the second slide groove 25 are symmetrically opened on the outer wall of the two ends of the fixed frame 1. The second slider 26 is fixedly set on the inner walls of the front and rear sides of one end of the first adjustment frame 2 and the second adjustment frame 3. The second slider 26 is limited and slidably installed in the interior of the second slide groove 25. The top plate 4 and the fixed frame 1 can be fixedly connected by the fixing rod 9. When the first adjustment frame 2 and the second adjustment frame 3 are moved and adjusted, the first adjustment frame 2 or the second adjustment frame 3 can drive the first cross bar 14 or the second cross bar 15 through the U-shaped frame 10 to facilitate the adjustment of the first adjustment frame 2 and the second adjustment frame 3. Synchronous movement and adjustment are performed with simple operation, which is convenient for increasing the internal space of the fixed frame 1, the first adjustment frame 2 and the second adjustment frame 3, and is convenient for carrying items in a larger weight range. The cooperation of the first slide 13 and the U-shaped frame 10, and the cooperation of the second slider 26 and the second slide 25 can improve the stability of the first adjustment frame 2 and the second adjustment frame 3. By screwing in the fastening knob 27, the first cross bar 14 and the second cross bar 15 can be squeezed, which is convenient for fixing the first cross bar 14 and the second cross bar 15, can improve the stability of the transmission mechanism 11, and facilitate the fixing of the first adjustment frame 2 and the second adjustment frame 3.

[0024] In this embodiment, shaft rods are symmetrically fixed at the front and rear ends of the movable rod 19, and the shaft rods are rotatably installed inside the front and rear ends of the first adjustment frame 2 and the second adjustment frame 3. A limit rod 28 is equidistantly fixed on the top of the movable rod 19, and the cross-sectional shape of the limit rod 28 is "T"-shaped. The limit rod 28 is slidingly limited and installed inside the bottom end of the stretching plate 20. An inner spring is fixedly installed on the outer side of the limit rod 28 corresponding to the inside of the stretching plate 20. A baffle 21 is fixed at the top of the first adjustment frame 2 and the second adjustment frame 3 at the position of the stretching plate 20. By pulling the stretching plate 20 in the opposite direction away from the movable rod 19, the movable rod 19 and the stretching plate 20 can be rotated conveniently, so that the movable rod 19 and the stretching plate 20 can be adjusted to a horizontal state or a vertical state, which is convenient for taking and placing items, and can also block items.

[0025] In this embodiment, the mounting frame 5 is in a "U" shape, and fixing holes 8 are symmetrically opened inside the two ends of the mounting frame 5. The mounting frame 5 is fitted on the top of the top plate 4. The fixing holes 8 are used to conveniently fix the mounting frame 5 on the bottom of the drone, so that the supporting mechanism can be quickly combined and installed with different drones.

[0026] In this embodiment, the pressure sensor 23 is in contact with the side wall of the clamping rod 6, the top end of the clamping rod 6 is provided with a slope, the cross-sectional shape of the clamping rod 6 is "L"-shaped, and the internal longitudinal fixed support rods of the fixing frame 1, the first adjustment frame 2 and the second adjustment frame 3 are fixedly provided. The pressure sensor 23 can detect the change of the extrusion pressure between the clamping rod 6 and the through groove, thereby ensuring the stability between the clamping rod 6 and the mounting frame 5 during transportation. The cooperation of the support rod with the fixing frame 1, the first adjustment frame 2 and the second adjustment frame 3 facilitates the carrying of items.

[0027] When using the combined hoisting system for drones with a large weight range, a hole is opened at the bottom of the drone or a preset hole is used, and the two ends of the mounting bracket 5 are fitted with the bottom of the drone so that the fixing holes 8 are opposite to the openings or preset holes and bolts are installed, etc., which is convenient for fixing the mounting bracket 5 to the bottom of the drone and facilitating the rapid assembly and installation of the carrying mechanism with different drones; the drone with the mounting bracket 5 installed is placed on the top of the top plate 4, and the inclined surface and the clamping rod 6 are squeezed by the side walls of the through groove, and the clamping rods 6 on both sides slide within the internal limit of the mounting groove 7 and approach each other. At the same time, the clamping rod 6 and the U-shaped frame 10 work together to stretch the tension spring 24, so that The clamping rod 6 can enter the interior of the through slot, and the clamping rod 6 moves in the opposite direction under the tension of the tension spring 24 and is clamped with the top of the through slot, which is convenient for fixing the top plate 4 to the bottom of the mounting bracket 5. A positioning block is provided between the mounting slots 7 on both sides corresponding to the top of the top plate 4, and a positioning slot is provided at the bottom of the mounting bracket 5 corresponding to the position of the positioning block. When the top plate 4 and the mounting bracket 5 are fitted together, the positioning block can be installed inside the positioning slot, which is convenient for positioning and limiting the mounting bracket 5 and the top plate 4; turn the fastening knob 27 so that the inner end of the fastening knob 27 is separated from the first cross bar 14 and the second cross bar 15, and the first adjustment bracket 2 and the second adjustment bracket 3 are pulled to both sides. The first and second adjusting frames 2 and 3 drive the second slider 26 to slide inside the second slide groove 25, and at the same time drive the U-shaped frame 10 to slide inside the first slide groove 13. The cooperation between the first slide groove 13 and the U-shaped frame 10, and the cooperation between the second slider 26 and the second slide groove 25 can improve the stability of the first adjusting frame 2 and the second adjusting frame 3. By adjusting the first adjusting frame 2 and the second adjusting frame 3, the internal space size of the bearing mechanism can be increased, which is convenient for carrying items with a larger weight range. When the U-shaped frame 10 moves to both sides, the tension spring 24 is stretched, so that the tension spring 24 generates a reverse tension and pulls the clamping rod 6, which is convenient for fixing the clamping rod 6. At the same time, the clamping rod 6 is The pressure sensor 23 is squeezed and can monitor the change of the squeezing force between the clamping rod 6 and the inner wall of the through groove. The pressure sensor 23 is electrically connected to the flight control system of the UAV through a cable. After the adjustment is completed, the tightening knob 27 is tightened. The first cross bar 14 and the second cross bar 15 are squeezed by the tightening knob 27 to facilitate the fixation of the transmission mechanism 11. The side walls of the first cross bar 14 and the second cross bar 15 are provided with circular grooves corresponding to the positions of the tightening knobs 27. Inserting one end of the tightening knob 27 into the circular groove can improve the stability of the transmission mechanism 11, thereby facilitating the fixation of the first adjustment frame 2 and the second adjustment frame 3.Pulling the stretching plate 20 in the opposite direction of the limiting rod 28 separates the stretching plate 20 from the movable rod 19. Simultaneously, the limiting rod 28 compresses the inner spring, rotating the movable rod 19 and the stretching plate 20 to adjust them to a horizontal position, making it easier to place square-packaged items on top of the fixed rack 1, the first adjustment rack 2, the second adjustment rack 3, and the support rod. The stretching plate 20 is then pulled further and the movable rod 19 and the stretching plate 20 are rotated in the opposite direction to the inside of the baffle 21. The stretching plate 20 is then released. Under the action of the inner spring and the limiting rod 28, the stretching plate 20 can approach the movable rod 19 and be blocked on the inside of the baffle 21. This facilitates the use of the stretching plate 20 and the baffle 21 to move the outer side of the square-packaged items, thereby improving the stability of item transportation. The pressure sensor 23 is a conventional device equipped with a corresponding control circuit.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0029] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A combined lifting system for unmanned aerial vehicles (UAVs) suitable for carrying a large weight range, comprising a carrying mechanism, a clamping mechanism and a mounting frame (5), characterized in that: The bearing mechanism comprises a fixed frame (1), a first adjustment frame (2) and a second adjustment frame (3), wherein the first adjustment frame (2) and the second adjustment frame (3) are movably arranged on the left and right sides of the fixed frame (1) through a limiting mechanism (22), a U-shaped frame (10) is fixedly arranged on the top of each of the first adjustment frame (2) and the second adjustment frame (3), a blocking mechanism (12) is arranged inside one end of the first adjustment frame (2) and the second adjustment frame (3), the blocking mechanism (12) comprises a movable rod (19) and a stretching plate (20), the clamping mechanism comprises a mounting groove (7) and a top plate (4), the The mounting grooves (7) are symmetrically opened inside the two ends of the top plate (4), and the internal limit sliding installation of the mounting grooves (7) is provided with a clamping rod (6). The bottoms of the two ends of the top plate (4) are symmetrically opened with first sliding grooves (13). The top end of the U-shaped frame (10) is limitedly slidably installed inside the first sliding grooves (13). A tension spring (24) is fixedly installed between the top end of the U-shaped frame (10) and the bottom end of the clamping rod (6). Through grooves are symmetrically opened inside the two ends of the mounting frame (5), and the clamping rod (6) is clamped and installed inside the through grooves. A pressure sensor (23) is fixedly provided on the inner wall of the through groove.

2. The combined lifting system for UAVs suitable for carrying a wide range of weights according to claim 1, characterized in that: Fixing rods (9) are symmetrically fixedly provided at the front and rear ends of the top of the fixing frame (1), the top ends of the fixing rods (9) are fixedly connected to the bottom of the top plate (4), and the fixing rods (9) are arranged in the middle of the U-shaped frames (10) on both sides.

3. The combined lifting system for UAVs suitable for carrying a wide range of weights according to claim 2, characterized in that: A transmission mechanism (11) is provided between the fixing rod (9) and the U-shaped frames (10) on both sides. The transmission mechanism (11) comprises a fixing frame (16), a first cross bar (14) and a second cross bar (15). The fixing frame (16) is fixedly mounted on the outer walls of the front and rear fixing rods (9).

4. The combined lifting system for UAVs suitable for carrying a wide range of weights according to claim 3, characterized in that: One end of the first cross bar (14) and the second cross bar (15) are respectively fixedly connected to the outer walls of the U-shaped frame (10) on both sides, and the other ends of the first cross bar (14) and the second cross bar (15) are limitedly slidably installed inside the fixed frame (16), and the first cross bar (14) is arranged below the second cross bar (15).

5. The combined lifting system for UAVs suitable for carrying a wide range of weights according to claim 4, characterized in that: A rack (18) is fixedly provided at the top of the first crossbar (14) and the bottom of the second crossbar (15); a gear (17) is rotatably installed between the interior of the fixed frame (16) and the fixed rod (9); the gear (17) and the rack (18) are meshed with each other; a fastening knob (27) is screwedly installed at the top and bottom ends of the fixed frame (16); the inner end of the fastening knob (27) is in contact with the first crossbar (14) and the second crossbar (15).

6. The UAV combined lifting system suitable for carrying a large weight range according to claim 5, characterized in that: The limiting mechanism (22) includes a second slide groove (25) and a second slider (26). The second slide groove (25) is symmetrically opened inside the outer wall of the two ends of the fixed frame (1). The second slider (26) is fixedly arranged on the inner walls of the front and rear sides of one end of the first adjustment frame (2) and the second adjustment frame (3). The second slider (26) is limitedly slidably installed inside the second slide groove (25).

7. The UAV combined lifting system suitable for carrying a large weight range according to claim 1, characterized in that: Axle rods are symmetrically fixed at the front and rear ends of the movable rod (19), and the axle rods are rotatably mounted inside the front and rear ends of the first adjustment frame (2) and the second adjustment frame (3). A limit rod (28) is fixedly arranged at an equal distance on the top of the movable rod (19), and the cross-sectional shape of the limit rod (28) is "T"-shaped.

8. The UAV combined lifting system suitable for carrying a large weight range according to claim 7, characterized in that: The limiting rod (28) is slidably mounted inside the bottom end of the stretching plate (20), and an inner spring is fixedly mounted on the outer side of the limiting rod (28) corresponding to the inside of the stretching plate (20). A baffle (21) is fixedly provided at the top of the first adjustment frame (2) and the second adjustment frame (3) at a position corresponding to the stretching plate (20).

9. The UAV combined lifting system suitable for carrying a large weight range according to claim 1, characterized in that: The mounting frame (5) is in a "U" shape, and fixing holes (8) are symmetrically provided inside both ends of the mounting frame (5). The mounting frame (5) is fitted and mounted on the top of the top plate (4).

10. The combined lifting system for UAVs suitable for carrying a wide range of weights according to claim 1, characterized in that: The pressure sensor (23) is in contact with the side wall of the clamping rod (6), the top end of the clamping rod (6) is provided with an inclined surface, the cross-sectional view of the clamping rod (6) is in an "L" shape, and support rods are longitudinally fixedly provided inside the fixing frame (1), the first adjustment frame (2) and the second adjustment frame (3).

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