A load structure for unmanned aerial vehicle

Abstract

The present invention discloses a technical field related to drone load technology, specifically a load structure for drones, comprising a concave support seat, support legs symmetrically fixedly installed on the left and right sides of the concave support seat, a clamping drive mechanism installed on the inner side of the concave support seat, the opening of the concave support seat is designed to face downward, T-shaped connecting plates symmetrically installed on the left and right sides of the clamping drive mechanism, and clamping parts are detachably installed on the lower ends of the two T-shaped connecting plates. The beneficial effects of the present invention are: when it is necessary to clamp the load body, the drone drives the load structure to be sleeved on the load body, and the clamping parts are distributed on the left and right sides of the load body; during the downward descent of the drone, the lower end of the anti-fall mechanism rotates outward and opens, and at the same time the anti-fall mechanism drives the transmission mechanism to move close to the first locking mechanism, so that the first locking mechanism releases the lock on the clamping drive mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) payloads, and in particular to a payload structure for an UAV. Background Art

[0002] As drone technology matures, its adaptability and operational flexibility have led to its application in a growing number of fields. Drones are often equipped with payloads such as cameras, rescue supplies, and remote sensing equipment to perform tasks such as fixed-point photography, drop-offs, observation, and rescue operations. A removable connection between the drone and its payload facilitates the replacement of payloads to facilitate different missions. Currently, some drones utilize a clamping claw or two symmetrical gripping sections to secure the payload. While this approach allows for rapid clamping and release, it presents certain drawbacks during transport. Excessive clamping force can damage the payload, while insufficient clamping force can cause the payload to fall during transport, resulting in damage. Furthermore, existing payload clamping mechanisms lack self-locking mechanisms. This can cause the clamping mechanism to loosen during transport, resulting in a loss of secure grip and damage, hindering practical use. Summary of the Invention

[0003] The object of the present invention is to provide a load structure for a UAV to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a load structure for an unmanned aerial vehicle, comprising a concave support seat, support legs symmetrically fixedly mounted on the left and right sides of the concave support seat, a clamping drive mechanism mounted on the inner side of the concave support seat, the opening of the concave support seat being designed to face downward, T-shaped connecting plates symmetrically mounted on the left and right sides of the clamping drive mechanism, clamping portions detachably mounted on the lower ends of the two T-shaped connecting plates, anti-slip protection pads fixedly mounted on the opposing surfaces of the two symmetrical clamping portions, and a load body clamped between the two anti-slip protection pads;

[0005] The upper end of the concave support seat is equipped with a first locking mechanism for automatically locking the clamping drive mechanism, and the front and rear sides of the concave support seat are symmetrically equipped with anti-fall mechanisms for protecting the load body, and the upper end of the concave support seat is symmetrically fixedly connected with L-shaped mounting plates, and a cross bar is fixedly connected between the two L-shaped mounting plates. A transmission mechanism for unlocking the first locking mechanism is symmetrically sleeved on the cross bar, and the two ends of the transmission mechanism are respectively connected to the two anti-fall mechanisms symmetrically front and back.

[0006] As a further solution of the present invention, the clamping drive mechanism includes a bidirectional transmission screw that is rotatably installed between the two side plates of the concave support seat through a rotating shaft. The bidirectional transmission screw is symmetrically sleeved with an I-shaped sleeve in the front and back directions. The I-shaped sleeve is threadedly connected to the bidirectional transmission screw. The left and right ends of each I-shaped sleeve are rotatably connected to a movable plate through a circular shaft. The end of the movable plate away from the I-shaped sleeve is hinged to the T-shaped connecting plate through a hinge.

[0007] As a further solution of the present invention, the upper end of the concave support seat is symmetrically provided with a first T-shaped slide groove, and the upper end of the concave support seat is symmetrically provided with a second T-shaped slide groove on the left and right sides of the two first T-shaped slide grooves. The upper end of the I-shaped sliding sleeve is fixedly installed with a first T-shaped block, and the first T-shaped block is slidably connected to the adjacent first T-shaped slide groove front and back. The upper end of the T-shaped connecting plate is symmetrically fixedly connected with a second T-shaped block front and back, and the second T-shaped block is slidably connected to the second T-shaped slide groove left and right;

[0008] A through groove is provided at the upper end of the concave support seat between the two first T-shaped slide grooves that are symmetrical in front and back. A positioning gear is fixedly sleeved on the middle position of the bidirectional transmission screw. The positioning gear is engaged with the first locking mechanism, and the first locking mechanism is installed at the upper end of the through groove.

[0009] As a further solution of the present invention, the first locking mechanism includes a positioning tooth block clamped on the upper end of the positioning gear, the upper end of the positioning tooth block is fixedly connected to an extrusion plate, the bottoms of the left and right ends of the extrusion plate are inclined inwardly and provided with extrusion slopes, the front and rear sides of the extrusion plate are symmetrically fixedly connected to a lifting seat, the upper end of the lifting seat is provided with a through hole extending from top to bottom, a guide column is slidably inserted into the through hole from top to bottom, and the lower end of the guide column is fixedly connected to the upper end of the concave support seat;

[0010] The upper end of the guide column is sequentially sleeved with an anti-slip ring and a positioning spring from top to bottom. The anti-slip ring is fixedly connected to the upper end of the guide column, and the upper and lower ends of the positioning spring are respectively in contact with the anti-slip ring and the lifting seat.

[0011] As a further solution of the present invention, the anti-fall mechanism includes a positioning frame fixedly connected to the upper end of the concave support seat, one side of the positioning frame and the side surface of the concave support seat are in the same vertical plane, the side surface of the positioning frame is rotatably mounted with a rotating arm through a hinge shaft, the lower end of the rotating arm is designed to be bent outward, the bottom of the bent portion at the lower end of the rotating arm is rotatably connected to a roller through a pin shaft, the lower end of the rotating arm close to the concave support seat is fixedly mounted with an anti-fall support foot, the upper end of the rotating arm close to the concave support seat is fixedly connected with a round rod, the front and rear ends of the transmission mechanism are respectively in contact with the upper ends of the two front and rear symmetrical rotating arms;

[0012] The front and rear sides of the concave support seat are both symmetrically fixed with vertical plates, which are in contact with the side of the rotating arm. The side of the vertical plate close to the rotating arm is fixedly connected with a fan-shaped guide plate and an arc-shaped rod from top to bottom. The fan-shaped guide plate and the arc-shaped rod pass through the rotating arm from top to bottom.

[0013] The upper end of the arc rod is fixedly sleeved with a fixing ring, and the arc rod is sleeved with a downward pressure spring.

[0014] As a further solution of the present invention, the upper and lower ends of the downward pressure spring are respectively in contact with the fixed ring and the rotating arm, and the two vertical plates are arranged between the two symmetrical rotating arms, and the two vertical plates are respectively in contact with the side of the two rotating arms that are close to each other.

[0015] As a further solution of the present invention, the transmission mechanism includes a T-shaped transmission plate arranged between two front and rear symmetrical rotating arms, the T-shaped transmission plate is sleeved on the cross bar, an extrusion groove is provided on the side of the T-shaped transmission plate, the extrusion groove is sleeved on one end of the extrusion plate, the extrusion inclined surface at the end of the extrusion plate is in sliding contact with the bottom of the extrusion groove, the front and rear ends of the T-shaped transmission plate are symmetrically fixedly connected with transmission blocks, a transmission groove is provided through the side of the transmission block close to the rotating arm, the transmission groove is sleeved on the round rod, and the round rod is slidably connected to the transmission groove up and down.

[0016] As a further solution of the present invention, a second locking mechanism for locking the clamping drive mechanism is installed on the outer side surface of one side plate of the concave support seat, and one end of the second locking mechanism is connected to the rotating shaft at one end of the bidirectional transmission screw;

[0017] The second locking mechanism includes a concave plate fixedly mounted on the outer side of a side plate of the concave support seat, a circular groove is formed through the side of the concave plate, a polygonal rod is provided through the circular groove, and one end of the polygonal rod is fixedly connected to the outer end of the rotating shaft;

[0018] The end of the polygonal rod close to the outside is sequentially sleeved with a limit plate, a locking spring, an adjusting plate, a first annular crown gear and a second annular crown gear from the outside to the inside, the limit plate is fixedly connected to the end of the polygonal rod close to the outside, the first annular crown gear and the second annular crown gear are not in contact with the polygonal rod, one end of the second annular crown gear is rotatably connected to the circular groove, the adjusting plate is fixedly connected to the first annular crown gear, the teeth of the first annular crown gear and the teeth of the second annular crown gear are clamped, and a ratchet is fixedly sleeved on the outside of the second annular crown gear, the ratchet is arranged on the inner side of the concave plate, and the ratchet is in rotational contact with the inner side wall of the concave plate with a circular groove, and an anti-rotation mechanism is installed on the side of the ratchet on the inner side of the concave plate.

[0019] As a further solution of the present invention, the side of the second annular crown gear away from the teeth is in rotational contact with the concave support seat, and the two ends of the locking spring are respectively abutted against the limit plate and the adjustment plate. A polygonal groove matching the polygonal rod is opened through the side of the adjustment plate, and the polygonal groove is connected to the polygonal rod for a front-rear sliding connection.

[0020] As a further solution of the present invention, the anti-rotation mechanism includes a pawl clamped on the side of the ratchet, and the pawl is rotatably connected to the concave plate and the concave support seat through a pin shaft, and a reset spring is inserted between the side of the pawl and the concave plate.

[0021] The beneficial effects of the present invention are:

[0022] 1. When it is necessary to clamp the load body, the drone drives the load structure to be sleeved on the load body, and the clamping parts are distributed on the left and right sides of the load body; during the downward descent of the drone, the lower end of the anti-fall mechanism rotates outward and opens, and at the same time, the anti-fall mechanism drives the transmission mechanism to move close to the first locking mechanism, so that the first locking mechanism releases the lock on the clamping drive mechanism; at this time, the adjusting plate rotates forward, so that the clamping drive mechanism drives the two T-shaped connecting plates to approach each other, so that the two clamping parts drive the anti-slip protection pads to clamp and fix the load body; the ratchet is locked by the anti-rotation mechanism to prevent the second locking mechanism from reversing, thereby preventing the bidirectional transmission screw from reversing, so that the clamping part and the anti-slip protection pad can firmly clamp and fix the load body.

[0023] 2. At this time, the drone drives the load body to slowly take off upward through the load structure, thereby transporting the load body; under the action of the downward spring force, the rotating arm rotates downward until the side of the rotating arm contacts the side of the vertical plate. At this time, the anti-fall support foot rotates to the bottom of the load body, and can support the load body at any time to prevent the load body from falling; if the load body falls downward, after the load body falls down for a distance, the lower end of the load body contacts the upper end of the anti-fall support foot, and the load body is supported and positioned by the anti-fall support foot, thereby effectively preventing the load body from continuing to fall downward, thereby protecting the load body.

[0024] 3. When the load body needs to be unloaded, if the load body does not fall, the lower end of the bilaterally symmetrical anti-fall mechanism rotates outward and opens, and at the same time, the anti-fall mechanism drives the transmission mechanism to move closer to the first locking mechanism, so that the first locking mechanism releases the lock on the clamping drive mechanism; the adjustment plate is pulled outward along the polygonal rod, and then the adjustment plate is reversed, so that the clamping part drives the anti-slip protection pad to release the clamping fixation on the load body, completing the unloading of the load body, and then the adjustment plate is released to reset;

[0025] 4. If the load body falls, the roller at the lower end of the rotating arm first contacts the landing platform or the ground. At this time, the rotating arm and the roller play a supporting role until the UAV stops and completes the landing; manually pull the extrusion plate upward to release the lock of the positioning gear by the first locking mechanism, and then pull the adjustment plate outward along the polygonal rod, and rotate the adjustment plate in the opposite direction to cause the clamping drive mechanism to drive the clamping part to loosen the clamping of the load body. At this time, the load body is slowly pushed upward. Under the action of the gravity of the UAV and the load structure, the rotating arm is tilted outward and rotated, and the roller rolls along the landing platform or the ground until the rotating arm is opened to the maximum. At this time, the lower end of the support leg contacts the landing platform or the ground, and the concave support seat is supported by the support leg, thereby supporting the UAV; at this time, the UAV can be moved upward manually, or the UAV can move upward automatically after starting, and the UAV drives the load structure to move upward from the upper end of the load body to complete the unloading of the load body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a perspective view of the anti-fall mechanism in the load structure for the UAV of the present invention when it is upright;

[0027] Figure 2 This is a three-dimensional view of the anti-fall mechanism in the load structure for the UAV of the present invention when it is unfolded outward;

[0028] Figure 3 This is an exploded view of the concave support seat, first locking mechanism, transmission mechanism and anti-fall mechanism of the present invention;

[0029] Figure 4 This is a side sectional view of the concave support seat structure of the present invention;

[0030] Figure 5 It is a side cross-sectional view of the concave support seat, clamping portion and transmission mechanism structure of the present invention;

[0031] Figure 6 It is a partial schematic diagram of the concave support seat, the second locking mechanism and the anti-rotation mechanism of the present invention;

[0032] Figure 7 This is an exploded view of the concave support seat, clamping drive mechanism, clamping portion and first locking mechanism structure of the present invention;

[0033] Figure 8 This is an exploded view of the concave support seat, second locking mechanism and anti-rotation mechanism structure of the present invention.

[0034] In the figure: 1. Concave support seat; 11. Through slot; 12. First T-shaped slide; 13. Second T-shaped slide; 14. L-shaped mounting plate; 15. Crossbar; 16. Support leg; 2. Bidirectional transmission screw; 21. I-shaped sliding sleeve; 22. First T-shaped block; 23. Movable plate; 24. T-shaped connecting plate; 25. Second T-shaped block; 26. Clamping part; 27. Load body; 3. Positioning gear; 31. Positioning gear block; 32. Extrusion plate; 33. Lifting seat; 34. Guide column; 35. Anti-slip ring; 36. Positioning spring ;4. Positioning frame;41. Rotating arm;42. Roller;43. Anti-fall support foot;44. Round rod;5. Vertical plate;51. Arc rod;52. Downward pressure spring;53. Fixed ring;54. Fan-shaped guide plate;6. T-shaped transmission plate;61. Extrusion groove;62. Transmission block;63. Transmission groove;7. Concave plate;71. Polygonal rod;72. Limit plate;73. Locking spring;74. Adjustment plate;75. First annular crown gear;76. Second annular crown gear;77. Ratchet;8. Pawl;81. Return spring. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1 to 8 The present invention provides a technical solution: a load structure for a drone, comprising a concave support seat 1, support legs 16 being symmetrically fixedly installed on the left and right sides of the concave support seat 1, a clamping drive mechanism being installed on the inner side of the concave support seat 1, the opening of the concave support seat 1 being designed to face downward, T-shaped connecting plates 24 being symmetrically installed on the left and right sides of the clamping drive mechanism, the upper ends of the T-shaped connecting plates 24 being in sliding contact with the top of the inner side of the concave support seat 1, the lower ends of the two T-shaped connecting plates 24 being detachably mounted with clamping parts 26, the opposite surfaces of the two symmetrical clamping parts 26 being fixedly connected with anti-slip protection pads, and a load body 27 being clamped between the two anti-slip protection pads;

[0037] The upper end of the concave support seat 1 is equipped with a first locking mechanism for automatically locking the clamping drive mechanism. The front and rear sides of the concave support seat 1 are symmetrically equipped with anti-fall mechanisms for protecting the load body 27. The upper end of the concave support seat 1 is symmetrically fixed with L-shaped mounting plates 14, and a cross bar 15 is fixedly connected between the two L-shaped mounting plates 14. The cross bar 15 is symmetrically sleeved with a transmission mechanism for unlocking the first locking mechanism, and the two ends of the transmission mechanism are respectively connected to the two anti-fall mechanisms symmetrically front and back.

[0038] The two anti-falling mechanisms on the front and rear sides of the concave support seat 1 are symmetrically distributed front to back, and the transmission mechanism is arranged between the two symmetrical anti-falling mechanisms.

[0039] The upper end of the L-shaped mounting plate 14 is fixedly connected to the lower end of the drone, and the connection method is a detachable connection through bolts, clamping, etc.

[0040] See also Figure 4 、 Figure 5 and Figure 7 The clamping drive mechanism includes a bidirectional transmission screw 2 that is rotatably installed between the two side plates of the concave support seat 1 through a rotating shaft. The bidirectional transmission screw 2 is a circular rod with a left-hand thread and a right-hand thread at both ends. Both ends of the bidirectional transmission screw 2 are integrally formed with a rotating shaft. The bidirectional transmission screw 2 is rotatably connected to the side plate of the concave support seat 1 through the rotating shaft. The bidirectional transmission screw 2 is symmetrically sleeved with an I-shaped sleeve 21 front and back. The upper end of the I-shaped sleeve 21 is in front and back sliding contact with the top of the inner side of the concave support seat 1. The I-shaped sleeve 21 is threadedly connected to the bidirectional transmission screw 2. The left and right ends of each I-shaped sleeve 21 are rotatably connected to a movable plate 23 through a circular shaft. The end of the movable plate 23 away from the I-shaped sleeve 21 is hinged to the T-shaped connecting plate 24 through a hinge.

[0041] By rotating the bidirectional transmission screw 2 forward or reverse, the bidirectional transmission screw 2 drives the two I-shaped sliding sleeves 21 thereon to move closer or farther backward. When the I-shaped sliding sleeve 21 moves, it drives the movable plate 23 to rotate, and the movable plate 23 drives the T-shaped connecting plate 24 to move, so that the two T-shaped connecting plates 24 move closer to each other to clamp and fix the load body 27, or move the two T-shaped connecting plates 24 away from each other to release the clamping and fixation of the load body 27.

[0042] See also Figures 4 to 7 , the upper end of the concave support seat 1 is symmetrically provided with a first T-shaped slide groove 12, and the upper end of the concave support seat 1 is symmetrically provided with a second T-shaped slide groove 13 on the left and right sides of the two first T-shaped slide grooves 12. The upper end of the I-shaped sliding sleeve 21 is fixedly installed with a first T-shaped block 22, and the first T-shaped block 22 is slidably connected to the adjacent first T-shaped slide groove 12 front and back. The upper end of the T-shaped connecting plate 24 is symmetrically fixedly connected with a second T-shaped block 25 front and back, and the second T-shaped block 25 is slidably connected to the second T-shaped slide groove 13 left and right;

[0043] A through groove 11 is provided at the upper end of the concave support seat 1 between two front-to-back symmetrical first T-shaped slide grooves 12. A positioning gear 3 is fixedly sleeved on the middle position of the bidirectional transmission screw 2. The positioning gear 3 is engaged with the first locking mechanism, and the first locking mechanism is installed at the upper end of the through groove 11.

[0044] When the I-shaped sliding sleeve 21 moves forward and backward, the I-shaped sliding sleeve 21 drives the first T-shaped block 22 to slide forward and backward along the first T-shaped sliding groove 12, so that the I-shaped sliding sleeve 21 can move forward and backward stably;

[0045] When the T-shaped connecting plate 24 moves left and right, the T-shaped connecting plate 24 drives the second T-shaped block 25 to slide left and right along the second T-shaped sliding groove 13, so that the T-shaped connecting plate 24 can move left and right stably, and the T-shaped connecting plate 24 drives the clamping portion 26 and the anti-slip protection pad to clamp or release the load body 27.

[0046] See also Figure 5 and Figure 7 The first locking mechanism includes a positioning tooth block 31 clamped on the upper end of the positioning gear 3, and the upper end of the positioning tooth block 31 is fixedly connected to an extrusion plate 32. The bottoms of the left and right ends of the extrusion plate 32 are inclined inwardly and provided with extrusion slopes. The front and rear sides of the extrusion plate 32 are symmetrically fixedly connected to a lifting seat 33. A through hole is opened from top to bottom on the upper end of the lifting seat 33, and a guide column 34 is slidably inserted into the through hole from top to bottom. The lower end of the guide column 34 is fixedly connected to the upper end of the concave support seat 1;

[0047] When the lifting seat 33 moves up and down, the through hole in the lifting seat 33 moves up and down along the guide column 34, so that the lifting seat 33 can move up and down stably, and then the extrusion plate 32 can drive the positioning gear block 31 to move up and down stably;

[0048] The upper end of the guide column 34 is sequentially sleeved with an anti-slip ring 35 and a positioning spring 36 from top to bottom. The anti-slip ring 35 is fixedly connected to the upper end of the guide column 34. The upper and lower ends of the positioning spring 36 are respectively in contact with the anti-slip ring 35 and the lifting seat 33. The positioning spring 36 applies a downward elastic force to the lifting seat 33.

[0049] When there is no external force pushing the extrusion plate 32, the lifting seat 33 moves downward under the action of the elastic force of the positioning spring 36, and the lifting seat 33 drives the positioning tooth block 31 to move downward through the extrusion plate 32, so that the positioning tooth block 31 engages with the positioning gear 3, thereby locking the positioning gear 3;

[0050] Since the positioning gear 3 is fixedly sleeved on the bidirectional transmission screw 2, the bidirectional transmission screw 2 and the positioning gear 3 rotate or stop synchronously. When the positioning gear 3 is locked, the bidirectional transmission screw 2 cannot rotate either, and the clamping drive mechanism cannot drive the clamping portion 26 to move, preventing the clamping portion 26 from loosening its grip on the load body 27, thereby ensuring that the clamping portion 26 can firmly clamp and fix the load body 27.

[0051] When the extrusion plate 32 is squeezed by an external force and moves upward, the extrusion plate 32 drives the positioning tooth block 31 to separate from the positioning gear 3, thereby releasing the lock on the positioning gear 3, allowing the bidirectional transmission screw 2 to rotate forward or reverse at will;

[0052] When the extrusion plate 32 moves upward, the lifting seat 33 is driven to move upward synchronously. The lifting seat 33 presses the positioning spring 36 so that the positioning spring 36 keeps pushing the lifting seat 33 downward.

[0053] See also Figures 1 to 3 The anti-fall mechanism includes a positioning frame 4 fixedly connected to the upper end of the concave support seat 1, one side of the positioning frame 4 and the side surface of the concave support seat 1 are in the same vertical plane, and a rotating arm 41 is rotatably installed on the side of the positioning frame 4 through a hinge shaft, and the lower end of the rotating arm 41 is designed to be bent outward, and the bottom of the bent portion of the lower end of the rotating arm 41 is rotatably connected to a roller 42 through a pin shaft, and the bent portions of the lower ends of the two symmetrical rotating arms 41 are designed in an eight-shaped shape, and an anti-fall supporting foot 43 is fixedly installed on the lower end of the rotating arm 41 close to the concave support seat 1, and a round rod 44 is fixedly connected to the upper end of the rotating arm 41 close to the concave support seat 1, and the front and rear ends of the transmission mechanism are respectively in contact with the upper ends of the two symmetrical rotating arms 41;

[0054] The front and rear sides of the concave support seat 1 are both symmetrically fixed with vertical plates 5, which are in contact with the side of the rotating arm 41. The side of the vertical plate 5 close to the rotating arm 41 is fixedly connected to the fan-shaped guide plate 54 and the arc-shaped rod 51 from top to bottom. The fan-shaped guide plate 54 and the arc-shaped rod 51 pass through the rotating arm 41 from top to bottom.

[0055] A fan-shaped through slot and an arc-shaped hole are formed through the side of the rotating arm 41. The fan-shaped guide plate 54 passes through the fan-shaped through slot and is slidably connected to the fan-shaped through slot. The arc-shaped rod 51 passes through the arc-shaped hole and is slidably connected to the arc-shaped hole.

[0056] A fixing ring 53 is fixedly sleeved on the upper end of the arc-shaped rod 51 , and a downward pressing spring 52 is sleeved on the arc-shaped rod 51 .

[0057] The upper and lower ends of the downward pressure spring 52 are respectively in contact with the fixed ring 53 and the rotating arm 41. The two vertical plates 5 are arranged between the two symmetrical rotating arms 41, and the two vertical plates 5 are respectively in contact with the side of the two rotating arms 41 that are close to each other. The downward pressure spring 52 applies a downward elastic force to the rotating arm 41.

[0058] When the rotating arm 41 rotates upward or downward, it slides along the arc rod 51 and the fan-shaped guide plate 54, so that the rotating arm 41 can rotate stably. When the rotating arm 41 rotates, it rotates around the axis of the hinge shaft.

[0059] During the transportation of the load body 27 driven by the drone, one side of the rotating arm 41 is close to the vertical plate 5. At this time, the rotating arm 41 is vertically downward, and the anti-fall support foot 43 at the lower end of the rotating arm 41 is below the load body 27.

[0060] If the load body 27 falls downward, after the load body 27 falls downward for a distance, the lower end of the load body 27 contacts the upper end of the anti-fall support foot 43, and the anti-fall support foot 43 supports and positions the load body 27, thereby effectively preventing the load body 27 from falling further downward, thereby protecting the load body 27.

[0061] If the load body 27 falls down a certain distance and contacts the upper end of the anti-fall support foot 43, the load body 27 is supported and positioned by the anti-fall support foot 43. During the drone's descent, the roller 42 at the lower end of the rotating arm 41 first contacts the landing platform or the ground. At this time, the rotating arm 41 and the roller 42 provide support until the drone stops and completes the landing.

[0062] When the load body 27 needs to be unloaded at this time, the squeezing plate 32 is manually pulled upward to release the lock of the positioning gear 3 by the first locking mechanism, and then the clamping drive mechanism drives the clamping portion 26 to release the clamping of the load body 27. At this time, the load body 27 is slowly pushed upward. Under the action of the gravity of the UAV and the load structure, the rotating arm 41 tilts outward and rotates. The roller 42 rolls along the landing platform or the ground until the rotating arm 41 is fully opened. At this time, the lower end of the support leg 16 contacts the landing platform or the ground, and the concave support seat 1 is supported by the support leg 16, thereby supporting the UAV.

[0063] At this time, the drone can be moved upward manually, or the drone can be automatically moved upward after being started. The drone drives the load structure to move upward away from the upper end of the load body 27 to complete the unloading of the load body 27.

[0064] If the load body 27 does not fall downward, the UAV continues to descend, and the rollers 42 roll along the landing platform or the ground until the rotating arms 41 are fully opened. At this time, the lower ends of the support legs 16 contact the landing platform or the ground, and the concave support base 1 is supported by the support legs 16, thereby supporting the UAV.

[0065] At this time, the clamping drive mechanism drives the clamping portion 26 to release the clamping of the load body 27 , and then the drone drives the load structure to move upward from the upper end of the load body 27 to complete the unloading of the load body 27 .

[0066] When the load structure needs to clamp the load body 27, in the initial state, the two clamping parts 26 are away from each other to the maximum distance;

[0067] The drone drives the load structure downward and stops above the load body 27. At this time, the lower end of the rotating arm 41 tilts outward, and the rotating arm 41 squeezes the downward spring 52. At the same time, the clamping parts 26 are located on the left and right sides of the load body 27. The clamping drive mechanism drives the two clamping parts 26 to approach each other, so that the clamping parts 26 drive the anti-slip protection pad to clamp and fix the load body 27.

[0068] During transportation, the drone drives the load body 27 upward through the load structure, thereby transporting the load body 27. After the drone slowly takes off, the rotating arm 41 rotates downward under the action of the elastic force of the downward pressure spring 52 until the side of the rotating arm 41 contacts the side of the vertical plate 5. At this time, the anti-fall support foot 43 rotates to the bottom of the load body 27, and can support the load body 27 at any time to prevent the load body 27 from falling.

[0069] See also Figures 3 to 5 The transmission mechanism includes a T-shaped transmission plate 6 arranged between two front and rear symmetrical rotating arms 41. The T-shaped transmission plate 6 is sleeved on the cross bar 15. The T-shaped transmission plate 6 is connected to slide left and right along the cross bar 15, so that the T-shaped transmission plate 6 can only slide left and right along the cross bar 15. The two T-shaped transmission plates 6 are symmetrically distributed at both ends of the extrusion plate 32. An extrusion groove 61 is provided on the side of the T-shaped transmission plate 6. The extrusion groove 61 is sleeved on one end of the extrusion plate 32. The extrusion inclined surface at the end of the extrusion plate 32 slides in contact with the bottom of the extrusion groove 61. The front and rear ends of the T-shaped transmission plate 6 are symmetrically fixed with a transmission block 62. A transmission groove 63 is provided on the side of the transmission block 62 close to the rotating arm 41. The transmission groove 63 is sleeved on the round rod 44, and the round rod 44 is connected to the transmission groove 63 for sliding up and down.

[0070] When the lower end of the rotating arm 41 is opened and rotated outward, the upper end of the rotating arm 41 is tilted and rotated inward. At this time, the upper end of the rotating arm 41 drives the round rod 44 to move inward. The round rod 44 slides downward along the transmission groove 63 on the side of the transmission block 62. At the same time, the round rod 44 pushes the transmission block 62 to move inward, and the transmission block 62 drives the T-shaped transmission plate 6 to slide inward along the cross bar 15.

[0071] At this time, the extrusion groove 61 on the side of the T-shaped transmission plate 6 moves toward the extrusion plate 32, and the bottom of the extrusion groove 61 slides along the extrusion slope at the lower end of the extrusion plate 32, thereby pushing the extrusion plate 32 to move upward, and the extrusion plate 32 drives the positioning gear block 31 to move upward, so that the positioning gear block 31 releases the lock on the positioning gear 3.

[0072] When the rotating arm 41 rotates downward, the upper end of the rotating arm 41 rotates outward, and the round rod 44 at the upper end of the rotating arm 41 pushes the transmission block 62 to move outward. The transmission block 62 drives the T-shaped transmission plate 6 to slide outward along the cross bar 15, so that the T-shaped transmission plate 6 releases the push on the extrusion plate 32. Under the action of the elastic force of the positioning spring 36, the lifting seat 33 drives the extrusion plate 32 to move downward, and the extrusion plate 32 drives the positioning gear block 31 to lock the positioning gear 3.

[0073] See also Figure 6 and Figure 8 A second locking mechanism for locking the clamping drive mechanism is installed on the outer side surface of one side plate of the concave support seat 1, and one end of the second locking mechanism is connected to the rotating shaft at one end of the bidirectional transmission screw 2;

[0074] The second locking mechanism includes a concave plate 7 fixedly mounted on the outer side of a side plate of the concave support seat 1. A circular groove is formed on the side of the concave plate 7, and a polygonal rod 71 is provided in the circular groove. One end of the polygonal rod 71 is fixedly connected to the outer end of the rotating shaft. The rotating shaft at one end of the bidirectional transmission screw 2 passes through the side plate of the concave support seat 1. The rotating shaft of the bidirectional transmission screw 2 drives the polygonal rod 71 to rotate synchronously. By rotating the polygonal rod 71, the polygonal rod 71 drives the bidirectional transmission screw 2 to rotate synchronously through the rotating shaft.

[0075] The end of the polygonal rod 71 near the outside is sequentially sleeved with a limit plate 72, a locking spring 73, an adjusting plate 74, a first annular crown gear 75 and a second annular crown gear 76 from the outside to the inside. The limit plate 72 is fixedly connected to the end of the polygonal rod 71 near the outside. The first annular crown gear 75 and the second annular crown gear 76 do not contact the polygonal rod 71. One end of the second annular crown gear 76 is rotatably connected to the circular groove. The adjusting plate 74 is fixedly connected to the first annular crown gear 75. The teeth of the first annular crown gear 75 and the teeth of the second annular crown gear 76 are engaged. The outer side of the second annular crown gear 76 is fixedly sleeved with a ratchet 77. The ratchet 77 is arranged on the inner side of the concave plate 7. The ratchet 77 is in rotational contact with the inner side wall of the concave plate 7 with a circular groove. An anti-rotation mechanism is installed on the side of the ratchet 77 on the inner side of the concave plate 7.

[0076] The side of the second annular crown gear 76 away from the teeth is in rotational contact with the concave support seat 1, and the two ends of the locking spring 73 are respectively in contact with the limit plate 72 and the adjustment plate 74. The side of the adjustment plate 74 is penetrated by a polygonal groove that matches the polygonal rod 71, and the polygonal groove is connected to the polygonal rod 71 for forward and backward sliding.

[0077] The anti-rotation mechanism includes a pawl 8 clamped on the side of the ratchet 77. The pawl 8 is rotatably connected to the concave plate 7 and the concave support seat 1 through a pin shaft. A reset spring 81 is inserted between the side of the pawl 8 and the concave plate 7.

[0078] The return spring 81 applies elastic force to the pawl 8, so that the pawl 8 always maintains a tendency to engage with the ratchet 77, so that the ratchet 77 can only rotate forward and cannot rotate in the reverse direction.

[0079] When the load body 27 is clamped and fixed, the adjusting plate 74 is rotated forward, and the adjusting plate 74 drives the first annular crown gear 75 to rotate, and the first annular crown gear 75 drives the second annular crown gear 76 to rotate synchronously, and the second annular crown gear 76 drives the ratchet 77 to rotate, and the ratchet 77 pushes the pawl 8 away from the ratchet 77 to rotate, and the pawl 8 squeezes the return spring 81; when the ratchet 77 stops, the pawl 8 is engaged with the ratchet 77 under the action of the return spring 81, preventing the ratchet 77 from rotating in the opposite direction, thereby preventing the polygonal rod 71, the limit plate 72, the adjusting plate 74, the first annular crown gear 75 and the second annular crown gear 76 from rotating in the opposite direction;

[0080] When the adjustment plate 74 rotates forward, it drives the polygonal rod 71 to rotate forward. The polygonal rod 71 drives the bidirectional transmission screw 2 to rotate forward through the rotating shaft. The bidirectional transmission screw 2 drives the two I-shaped sliding sleeves 21 thereon to approach each other, so that the clamping part 26 drives the anti-slip protection pad to clamp and fix the load body 27.

[0081] The anti-rotation mechanism prevents the bidirectional transmission screw 2 from rotating in the opposite direction, thereby enabling the clamping portion 26 and the anti-slip protection pad to firmly clamp and fix the load body 27 .

[0082] When it is necessary to reverse the bidirectional transmission screw 2 so that the clamping portion 26 drives the anti-slip protection pad to loosen the clamping fixation on the load body 27, the adjustment plate 74 is first pulled outward along the polygonal rod 71. The adjustment plate 74 squeezes the locking spring 73. At the same time, the adjustment plate 74 drives the first annular crown gear 75 away from the second annular crown gear 76, so that the first annular crown gear 75 and the second annular crown gear 76 are separated, allowing the first annular crown gear 75 to reverse.

[0083] At this time, the adjusting plate 74 is rotated in the opposite direction, and the adjusting plate 74 drives the polygonal rod 71 to rotate in the opposite direction. The polygonal rod 71 drives the bidirectional transmission screw 2 to rotate in the opposite direction through the rotating shaft. The bidirectional transmission screw 2 drives the two I-shaped sliding sleeves 21 thereon to move away from each other, so that the clamping portion 26 drives the anti-slip protection pad to loosen the clamping fixation on the load body 27.

[0084] After the adjustment is completed, the adjustment plate 74 is released, and the adjustment plate 74 moves closer to the concave plate 7 under the action of the elastic force of the locking spring 73. The adjustment plate 74 drives the teeth of the first annular crown gear 75 to engage with the teeth of the second annular crown gear 76 to complete the reset.

[0085] Working principle: When the load body 27 needs to be clamped, the drone drives the load structure downward along the upper end of the load body 27, so that the load structure is sleeved on the load body 27, and the clamping parts 26 are distributed on the left and right sides of the load body 27;

[0086] During the descent of the drone, the roller 42 at the lower end of the rotating arm 41 first contacts the landing platform on the ground. At this time, the drone continues to descend until it stops. The lower end of the rotating arm 41 tilts outward, and the upper end of the rotating arm 41 tilts inward and rotates. At this time, the round rod 44 pushes the transmission block 62 to move inward, and the transmission block 62 drives the T-shaped transmission plate 6 to slide inward along the cross bar 15.

[0087] The bottom of the extrusion groove 61 on the side of the T-shaped transmission plate 6 slides along the extrusion slope of the lower end of the extrusion plate 32, thereby pushing the extrusion plate 32 to move upward, and the extrusion plate 32 drives the positioning gear block 31 to move upward, so that the positioning gear block 31 releases the lock on the positioning gear 3;

[0088] At this time, the adjusting plate 74 rotates forward, and the adjusting plate 74 drives the first annular crown gear 75 to rotate, and the first annular crown gear 75 drives the second annular crown gear 76 to rotate synchronously, and the second annular crown gear 76 drives the ratchet wheel 77 to rotate, and the ratchet wheel 77 pushes the pawl 8 away from the ratchet wheel 77, and the pawl 8 squeezes the return spring 81;

[0089] When the adjustment plate 74 rotates forward, it drives the polygonal rod 71 to rotate forward. The polygonal rod 71 drives the bidirectional transmission screw 2 to rotate forward through the rotating shaft. The bidirectional transmission screw 2 drives the two I-shaped sliding sleeves 21 thereon to approach each other. The I-shaped sliding sleeve 21 drives the two T-shaped connecting plates 24 to approach each other through the movable plate 23, so that the clamping part 26 drives the anti-slip protection pad to clamp and fix the load body 27.

[0090] After the load body 27 is clamped and fixed, the adjustment plate 74 is stopped from rotating, thereby stopping the polygonal rod 71, the first annular crown gear 75, the second annular crown gear 76 and the ratchet 77 from rotating;

[0091] When the ratchet 77 stops, the pawl 8 engages with the ratchet 77 under the action of the elastic force of the return spring 81, preventing the ratchet 77 from rotating in the opposite direction, thereby preventing the polygonal rod 71, the limit plate 72, the adjustment plate 74, the first annular crown gear 75 and the second annular crown gear 76 from rotating in the opposite direction.

[0092] The anti-rotation mechanism prevents the bidirectional transmission screw 2 from rotating in the opposite direction, thereby enabling the clamping portion 26 and the anti-slip protection pad to firmly clamp and fix the load body 27 .

[0093] At this time, the drone drives the load body 27 to slowly take off upwards through the load structure, thereby transporting the load body 27;

[0094] Under the action of the elastic force of the downward pressure spring 52, the rotating arm 41 rotates downward until the side of the rotating arm 41 contacts the side of the vertical plate 5. At this time, the anti-fall support foot 43 rotates to the bottom of the load body 27, and can support the load body 27 at any time to prevent the load body 27 from falling.

[0095] When the rotating arm 41 rotates downward, the upper end of the rotating arm 41 rotates outward, and the round rod 44 pushes the transmission block 62 to move outward, so that the T-shaped transmission plate 6 releases the push on the extrusion plate 32. Under the action of the elastic force of the positioning spring 36, the lifting seat 33 drives the extrusion plate 32 to move downward. The extrusion plate 32 drives the positioning gear block 31 to lock the positioning gear 3, and then locks the clamping drive mechanism, further ensuring the stability of the clamping portion 26 clamping the load body 27.

[0096] If the load body 27 falls downward, after the load body 27 falls downward for a distance, the lower end of the load body 27 contacts the upper end of the anti-fall support foot 43, and the anti-fall support foot 43 supports and positions the load body 27, thereby effectively preventing the load body 27 from falling further downward, thereby protecting the load body 27.

[0097] When the load body 27 needs to be unloaded, if the load body 27 does not fall, the lower end of the bilaterally symmetrical anti-falling mechanism rotates outward and opens, and at the same time, the anti-falling mechanism drives the transmission mechanism to move closer to the first locking mechanism, so that the first locking mechanism releases the lock on the clamping drive mechanism;

[0098] Pull the adjustment plate 74 outward along the polygonal rod 71, and the adjustment plate 74 drives the first annular crown gear 75 away from the second annular crown gear 76. At this time, rotate the adjustment plate 74 in the opposite direction, and the adjustment plate 74 drives the polygonal rod 71 to reverse. The polygonal rod 71 drives the two-way transmission screw 2 to reverse through the rotating shaft. The two-way transmission screw 2 drives the two I-shaped sliding sleeves 21 thereon to move away from each other, so that the clamping part 26 drives the anti-slip protection pad to loosen the clamping fixation of the load body 27, completing the unloading of the load body 27, and then loosen the adjustment plate 74 to reset.

[0099] If the payload body 27 falls, the roller 42 at the lower end of the rotating arm 41 first contacts the landing platform or the ground. At this time, the rotating arm 41 and the roller 42 provide support until the drone stops and completes the landing.

[0100] When the load body 27 needs to be unloaded at this time, the squeezing plate 32 is manually pulled upward to release the lock of the positioning gear 3 by the first locking mechanism, and then the adjusting plate 74 is pulled outward along the polygonal rod 71, and the adjusting plate 74 is rotated in the opposite direction, so that the clamping drive mechanism drives the clamping portion 26 to release the clamping of the load body 27. At this time, the load body 27 is slowly pushed upward, and the rotating arm 41 is tilted and rotated outward under the action of the gravity of the drone and the load structure, and the roller 42 rolls along the landing platform or the ground until the rotating arm 41 is opened to the maximum. At this time, the lower end of the support leg 16 contacts the landing platform or the ground, and the concave support seat 1 is supported by the support leg 16, thereby achieving support for the drone;

[0101] At this time, the drone can be moved upward manually, or the drone can be automatically moved upward after being started. The drone drives the load structure to move upward away from the upper end of the load body 27 to complete the unloading of the load body 27.

[0102] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A load structure for an unmanned aerial vehicle, comprising a concave support seat (1), wherein support legs (16) are symmetrically fixedly mounted on the left and right sides of the concave support seat (1), and characterized in that: A clamping drive mechanism is installed on the inner side of the concave support seat (1), the opening of the concave support seat (1) is designed to face downward, and T-shaped connecting plates (24) are symmetrically installed on the left and right sides of the clamping drive mechanism. The lower ends of the two T-shaped connecting plates (24) are detachably mounted with clamping parts (26), and the opposite surfaces of the two symmetrical clamping parts (26) are fixedly connected with anti-slip protection pads, and the load body (27) is clamped between the two anti-slip protection pads. The upper end of the concave support seat (1) is equipped with a first locking mechanism for automatically locking the clamping drive mechanism, and the front and rear sides of the concave support seat (1) are both symmetrically equipped with anti-falling mechanisms for protecting the load body (27), and the upper end of the concave support seat (1) is symmetrically fixedly connected with an L-shaped mounting plate (14), and a cross bar (15) is fixedly connected between the two L-shaped mounting plates (14). A transmission mechanism for unlocking the first locking mechanism is symmetrically sleeved on the cross bar (15), and both ends of the transmission mechanism are respectively connected to the two anti-falling mechanisms symmetrically in the front and rear. The anti-fall mechanism includes a positioning frame (4) fixedly connected to the upper end of the concave support seat (1), one side of the positioning frame (4) and the side of the concave support seat (1) are in the same vertical plane, the side of the positioning frame (4) is rotatably mounted with a rotating arm (41) through a hinge shaft, the lower end of the rotating arm (41) is designed to be bent outward, and the bottom of the bent portion of the lower end of the rotating arm (41) is rotatably connected to a roller (42) through a pin shaft, the lower end of the rotating arm (41) close to the concave support seat (1) is fixedly mounted with an anti-fall support foot (43), the upper end of the rotating arm (41) close to the concave support seat (1) is fixedly connected with a round rod (44), and the front and rear ends of the transmission mechanism are respectively in contact with the upper ends of the two front and rear symmetrical rotating arms (41); The front and rear sides of the concave support seat (1) are both symmetrically fixedly connected with vertical plates (5), the vertical plates (5) are in contact with the side of the rotating arm (41), and the side of the vertical plate (5) close to the rotating arm (41) is fixedly connected with a fan-shaped guide plate (54) and an arc-shaped rod (51) in sequence from top to bottom, and the fan-shaped guide plate (54) and the arc-shaped rod (51) are both passed through the rotating arm (41) from top to bottom; A fixing ring (53) is fixedly sleeved on the upper end of the arc-shaped rod (51), and a downward pressure spring (52) is sleeved on the arc-shaped rod (51).

2. The load structure for a UAV according to claim 1, characterized in that: The clamping drive mechanism comprises a bidirectional transmission screw (2) rotatably mounted between two side plates of a concave support seat (1) via a rotating shaft, an I-shaped sliding sleeve (21) is symmetrically sleeved on the bidirectional transmission screw (2) in front and back directions, the I-shaped sliding sleeve (21) is threadedly connected to the bidirectional transmission screw (2), and the left and right ends of each I-shaped sliding sleeve (21) are rotatably connected to a movable plate (23) via a circular shaft, and the end of the movable plate (23) away from the I-shaped sliding sleeve (21) is hinged to a T-shaped connecting plate (24) via a hinge.

3. The load structure for a UAV according to claim 2, characterized in that: The upper end of the concave support seat (1) is symmetrically provided with a first T-shaped chute (12) in front and back directions, and the upper end of the concave support seat (1) is symmetrically provided with a second T-shaped chute (13) on both left and right sides of the two first T-shaped chute (12). The upper end of the industrial sliding sleeve (21) is fixedly provided with a first T-shaped block (22), and the first T-shaped block (22) is connected to the adjacent first T-shaped chute (12) in a front-to-back sliding manner. The upper end of the T-shaped connecting plate (24) is symmetrically fixedly provided with a second T-shaped block (25), and the second T-shaped block (25) is connected to the second T-shaped chute (13) in a left-right sliding manner. A through slot (11) is provided at the upper end of the concave support seat (1) between two front-to-rear symmetrical first T-shaped slots (12); a positioning gear (3) is fixedly sleeved at the middle position of the bidirectional transmission screw (2); the positioning gear (3) is engaged with a first locking mechanism, and the first locking mechanism is installed at the upper end of the through slot (11).

4. The load structure for a UAV according to claim 3, characterized in that: The first locking mechanism includes a positioning tooth block (31) clamped on the upper end of the positioning gear (3), the upper end of the positioning tooth block (31) is fixedly connected to an extrusion plate (32), the bottoms of the left and right ends of the extrusion plate (32) are inclined inwardly and provided with extrusion slopes, the front and rear sides of the extrusion plate (32) are symmetrically fixedly connected to a lifting seat (33), the upper end of the lifting seat (33) is provided with a through hole from top to bottom, a guide column (34) is slidably inserted into the through hole from top to bottom, and the lower end of the guide column (34) is fixedly connected to the upper end of the concave support seat (1); The upper end of the guide column (34) is sleeved with an anti-slip ring (35) and a positioning spring (36) in sequence from top to bottom. The anti-slip ring (35) is fixedly connected to the upper end of the guide column (34). The upper and lower ends of the positioning spring (36) are respectively in contact with the anti-slip ring (35) and the lifting seat (33).

5. The load structure for a drone according to claim 1, characterized in that: The upper and lower ends of the downward pressure spring (52) are respectively in contact with the fixed ring (53) and the rotating arm (41); the two vertical plates (5) are arranged between the two symmetrical rotating arms (41); and the two vertical plates (5) are respectively in contact with the sides of the two rotating arms (41) that are close to each other.

6. The load structure for a drone according to claim 1, characterized in that: The transmission mechanism includes a T-shaped transmission plate (6) arranged between two front and rear symmetrical rotating arms (41), the T-shaped transmission plate (6) is sleeved on the cross bar (15), an extrusion groove (61) is provided on the side of the T-shaped transmission plate (6), the extrusion groove (61) is sleeved on one end of the extrusion plate (32), the extrusion inclined surface of the end of the extrusion plate (32) is in sliding contact with the bottom of the extrusion groove (61), the front and rear ends of the T-shaped transmission plate (6) are symmetrically fixedly connected with transmission blocks (62), a transmission groove (63) is provided through the side of the transmission block (62) close to the rotating arm (41), the transmission groove (63) is sleeved on the round rod (44), and the round rod (44) is slidably connected to the transmission groove (63) up and down.

7. The load structure for a UAV according to claim 1, characterized in that: A second locking mechanism for locking the clamping drive mechanism is installed on the outer side surface of a side plate of the concave support seat (1), and one end of the second locking mechanism is connected to the rotating shaft at one end of the bidirectional transmission screw (2); The second locking mechanism comprises a concave plate (7) fixedly mounted on the outer side of a side plate of the concave support seat (1), a circular groove is formed through the side of the concave plate (7), a polygonal rod (71) is formed through the circular groove, and one end of the polygonal rod (71) is fixedly connected to the outer end of the rotating shaft; The end of the polygonal rod (71) close to the outside is sleeved with a limit plate (72), a locking spring (73), an adjustment plate (74), a first annular crown gear (75) and a second annular crown gear (76) in sequence from the outside to the inside. The limit plate (72) is fixedly connected to the end of the polygonal rod (71) close to the outside. The first annular crown gear (75) and the second annular crown gear (76) are not in contact with the polygonal rod (71). One end of the second annular crown gear (76) rotates with the circular groove. The adjusting plate (74) is fixedly connected to the first annular crown gear (75), the teeth of the first annular crown gear (75) and the teeth of the second annular crown gear (76) are engaged, and the outer side of the second annular crown gear (76) is fixedly sleeved with a ratchet (77), which is arranged on the inner side of the concave plate (7), and the ratchet (77) is in rotational contact with the inner side wall of the concave plate (7) having a circular groove, and an anti-rotation mechanism is installed on the side of the ratchet (77) on the inner side of the concave plate (7).

8. The load structure for a drone according to claim 7, characterized in that: The side of the second annular crown gear (76) away from the teeth is in rotational contact with the concave support seat (1), and the two ends of the locking spring (73) are respectively in contact with the limit plate (72) and the adjustment plate (74). The side of the adjustment plate (74) is penetrated by a polygonal groove matching the polygonal rod (71), and the polygonal groove is connected to the polygonal rod (71) in a front-rear sliding manner.

9. The load structure for a drone according to claim 7, characterized in that: The anti-rotation mechanism includes a pawl (8) clamped on the side of the ratchet (77), the pawl (8) being rotatably connected to the concave plate (7) and the concave support seat (1) through a pin, and a return spring (81) is inserted between the side of the pawl (8) and the concave plate (7).

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