Unmanned aerial vehicle based on morphological transformation

Abstract

The invention relates to an unmanned aerial vehicle, in particular to an unmanned aerial vehicle based on form transformation, which comprises an unmanned aerial vehicle body, an on-off key arranged at one end of the unmanned aerial vehicle body, a holder arranged at the other end of the unmanned aerial vehicle body and four propeller assemblies arranged on the unmanned aerial vehicle body, a lifting telescopic structure is arranged on the unmanned aerial vehicle body and connected with the four propeller assemblies. The lifting telescopic structure is arranged on the unmanned aerial vehicle body, the four propeller assemblies are arranged at the four corners of the lifting telescopic structure correspondingly, and through adjustment of the lifting telescopic structure, the four propeller assemblies can achieve synchronous lifting or telescopic adjustment relative to the unmanned aerial vehicle body, so that the unmanned aerial vehicle can be adjusted synchronously when the unmanned aerial vehicle ascends; when the top flying space is shielded by light and fragile obstacles such as leaves and the like and needs to be crossed, the shape of the unmanned aerial vehicle is changed according to the flying environment, the propellers can be prevented from colliding with the leaves, and the obstacle crossing effect is improved.

Description

Technical Field

[0001] The invention relates to an unmanned aerial vehicle, in particular to an unmanned aerial vehicle based on morphological transformation. Background Art

[0002] A drone is an aircraft that does not require human piloting and is usually controlled by a remote control or automatic system. It can be used for aerial photography, measurement, patrolling, logistics distribution and other tasks. It is widely used in military, agriculture, logistics, entertainment and other fields. The main advantage of drones is that they can work in dangerous, difficult-to-reach or complex environments. At the same time, they are easy to operate and low in cost. Currently, there are conventional drones and morphologically transformable drones on the market. Morphologically transformable drones refer to drones that adapt to different flight environments or mission requirements by changing their structure or appearance. Their main feature is that they have a deformable design and can adjust their morphology during flight or between different tasks, thereby improving flight efficiency, flexibility or stability.

[0003] Current morphologically transformable drones, for example, cannot change their own morphology according to the flight environment when flying in a specific flight airspace or a smaller flight space. In particular, when the flight space is small and there are many obstacles in the flight airspace, the drone cannot fly well in such a flight space by changing its own morphology. For example, when the blades hit lighter and more fragile obstacles such as leaves, the flight stability of the drone is disturbed, and the drone cannot achieve the effect of accurately crossing obstacles. Summary of the invention

[0004] The purpose of the present invention is to provide a drone based on morphology transformation to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A drone based on morphing comprises a drone body, a switch key arranged at one end of the drone body, a gimbal arranged at the other end of the drone body, and four propeller assemblies arranged on the drone body, wherein a lifting and telescopic structure is arranged on the drone body, and the lifting and telescopic structure is connected to the four propeller assemblies;

[0007] The lifting and telescopic structure comprises a lifting mechanism installed on the UAV fuselage, a lifting rod slidably connected to the UAV fuselage and connected to the lifting mechanism, a driving mechanism installed on the UAV fuselage and connected to the lifting rod, and two telescopic mechanisms connected to the two sides of the lifting rod and connected to the driving mechanism, wherein the telescopic mechanism is connected to the propeller assembly;

[0008] The lifting mechanism is used to drive the lifting rod to rise and fall on the drone body. When the lifting rod is raised and lowered, it drives the telescopic mechanisms arranged on both sides to rise and fall. The driving mechanism is used to drive the two telescopic mechanisms to move synchronously. When the two telescopic mechanisms move synchronously, the four propeller assemblies move closer or farther away synchronously.

[0009] The morphologically transformed UAV as described above: expansion tubes are integrally formed at the four corners of the UAV fuselage, protective net plates are installed on the inner walls of the four expansion tubes, an adjustment frame is integrally formed on the UAV fuselage, a landing gear is symmetrically installed at the bottom of the UAV fuselage, and the adjustment frame is connected to the lifting mechanism and the driving mechanism.

[0010] The morphology-transforming drone as described above: the lifting mechanism comprises a first motor installed at the center of the top of the adjusting frame and a first screw rotatably connected to the central cavity of the adjusting frame, one end of the first screw being coaxially fixed to the transmission shaft of the first motor;

[0011] The first screw rod is threadedly connected to the lifting rod, and the lifting rod is slidably connected in the adjustment frame.

[0012] The above-mentioned morphology-transforming drone: the driving mechanism comprises a second motor installed at the center of the bottom of the adjusting frame and two prismatic transmission rods arranged on both sides of the second motor and rotatably connected to the cavity of the adjusting frame;

[0013] A first gear is fixedly connected to the transmission shaft of the second motor, and the two sides of the first gear are respectively meshed with two second gears. The two second gears are coaxially fixed to the bottom of the two prismatic transmission rods, and the two prismatic transmission rods are slidably connected to the lifting rods. The lifting rods are provided with slots with an aperture larger than the diameter of the prismatic transmission rods.

[0014] The above-mentioned drone based on morphological transformation: the driving mechanism further comprises two first bevel gears respectively slidably mounted on the two prismatic transmission rods, and two second bevel gears respectively meshing with the two first bevel gears;

[0015] The two second bevel gears are respectively fixedly connected to one end of the two second screw rods, and the other ends of the two second screw rods are provided with plug-in holes;

[0016] The first bevel gear and the second bevel gear are both rotatably connected in the cavity of the lifting rod.

[0017] The above-mentioned drone based on morphological transformation: the telescopic mechanism comprises a plug rod slidably plugged into the plug hole and a third bevel gear fixedly connected to one end of the plug rod;

[0018] The third bevel gear is rotatably connected in the cavity of the T-frame, a sliding cavity is provided in the T-frame at the location of the plug-in rod, a cylinder is fixedly connected inside the sliding cavity, the sliding cavity is slidably plugged with the lifting rod, and the cylinder is threadedly connected with the second screw.

[0019] As described above, the morphology-transforming drone: the telescopic mechanism also includes protrusions symmetrically fixed on the inner walls of the two ends of the T-frame and two extension rods slidably plugged into the T-frame at both ends of the protrusions, and the outer walls of the two extension rods are provided with depressions corresponding to the protrusions.

[0020] As described above, in the morphology-transforming drone: one end of each of the two extension rods is threadedly connected to a third screw, one end of the third screw is fixed to a fourth bevel gear, and the two fourth bevel gears are symmetrically rotatably connected in a cavity at the center of the T-frame.

[0021] The morphology-transforming drone as described above: a propeller assembly is installed on the extension rod, and two fourth bevel gears are arranged on both sides of the third bevel gear and mesh with it.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By setting a lifting and telescopic structure on the UAV body, four propeller assemblies are arranged at the four corners of the lifting and telescopic structure. Through the adjustment of the lifting and telescopic structure, the four propeller assemblies can be synchronously lifted or telescopically adjusted relative to the UAV body. Therefore, when the UAV rises and the top flight space is blocked by lighter and more fragile obstacles such as leaves and needs to be crossed, the lifting and telescopic structure can be used to make the four propeller assemblies fall and then shrink relative to the UAV body. After the shape is changed, the propeller assemblies are in a state of being close to the UAV body. At this time, when the UAV rises, it can break through obstacles such as leaves in the top flight space through the UAV body. When the UAV encounters an obstacle at the bottom of its descent, the propeller assemblies are placed above the UAV body under the adjustment of the lifting and telescopic structure. The shape of the UAV is changed according to the flight environment, which can avoid the propellers from colliding with leaves, causing the UAV to lose flight balance, thereby improving the obstacle crossing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the overall structure of the UAV based on morphological transformation.

[0025] Figure 2 This is a schematic diagram of the structure of the drone after the shape change based on shape transformation.

[0026] Figure 3 It is a schematic diagram of the structure of the UAV fuselage in the UAV based on morphological transformation.

[0027] Figure 4 This is a schematic diagram of the structure of the lifting and telescopic structure of a UAV based on morphological transformation.

[0028] Figure 5 This is a schematic diagram of the structure of the lifting mechanism in a UAV based on morphological transformation.

[0029] Figure 6 The schematic diagram of the structure of the lifting rod in the UAV based on morphological transformation.

[0030] Figure 7 This is a schematic diagram of the structure of the driving mechanism in a UAV based on morphological transformation.

[0031] Figure 8 This is a schematic diagram of the structure of another aspect of the driving mechanism in the UAV based on morphological transformation.

[0032] Fig. 9 This is another structural diagram of the driving mechanism of a UAV based on morphological transformation.

[0033] Fig.10 Schematic diagram of the structure of the second screw in the UAV based on morphological transformation.

[0034] Fig.11 The figure is a schematic diagram of the connection structure between the second screw rod and the plug-in rod in the UAV based on morphological transformation.

[0035] Fig.12 This is a schematic diagram of the structure of the third screw in the UAV based on morphological transformation.

[0036] Fig.13 This is a schematic diagram of the structure of the telescopic mechanism in a UAV based on morphological transformation.

[0037] Fig.14 Schematic diagram of the structure of the extension rod in the UAV based on morphological transformation.

[0038] Fig.15 The schematic diagram of the structure of the T-frame in the UAV based on morphological transformation.

[0039] In the figure: 1. UAV fuselage; 2. switch button; 3. gimbal; 4. expansion tube; 5. protective net disk; 6. adjustment frame; 7. landing gear; 8. first motor; 9. first screw rod; 10. lifting rod; 11. second motor; 12. first gear; 13. second gear; 14. prismatic transmission rod; 15. first bevel gear; 16. second bevel gear; 17. second screw rod; 18. plug-in hole; 19. plug-in rod; 20. third bevel gear; 21. fourth bevel gear; 22. third screw rod; 23. T-frame; 24. sliding cavity; 25. cylinder; 26. protrusion; 27. extension rod; 28. depression; 29. ​​propeller assembly. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] See also Figure 1 to Figure 15 In an embodiment of the present invention, a morphology-transforming drone comprises a drone body 1, a switch 2 arranged at one end of the drone body 1, a gimbal 3 arranged at the other end of the drone body 1, and four propeller assemblies 29 arranged on the drone body 1, wherein a lifting and telescopic structure is arranged on the drone body 1, and the lifting and telescopic structure is connected to the four propeller assemblies 29;

[0042] The lifting and telescopic structure comprises a lifting mechanism installed on the UAV fuselage 1, a lifting rod 10 slidably connected to the UAV fuselage 1 and connected to the lifting mechanism, a driving mechanism installed on the UAV fuselage 1 and connected to the lifting rod 10, and two telescopic mechanisms connected to the lifting rod 10 on both sides and connected to the driving mechanism, and the telescopic mechanism is connected to the propeller assembly 29;

[0043] The lifting mechanism is used to drive the lifting rod 10 to rise and fall on the UAV fuselage 1. When the lifting rod 10 is raised and lowered, it drives the telescopic mechanisms on both sides to rise and fall. The driving mechanism is used to drive the two telescopic mechanisms to move synchronously. When the two telescopic mechanisms move synchronously, the four propeller assemblies 29 move closer or farther away synchronously.

[0044] In this embodiment, the switch 2 is electrically connected to the components embedded in the drone body 1 through a conductive line to control the switch state of the internal components. The lifting rod 10 can be adjusted to rise and fall on the drone body 1 through the lifting mechanism. When the lifting rod 10 is raised and lowered, since the telescopic mechanism is connected to the lifting rod 10, the telescopic mechanism will rise and fall synchronously with the lifting rod 10. When the telescopic mechanism needs to be adjusted to make the four propeller assemblies 29 approach or move away synchronously, the telescopic mechanism can be adjusted in linkage through the movement of the driving mechanism, so that the four propeller assemblies 29 approach or move away synchronously. When the drone rises, if lighter and more fragile obstacles such as leaves appear in the top flight space to affect the flight, the propeller assembly 29 is lowered relative to the drone body 1 through the lifting mechanism. Afterwards, the telescopic mechanism is linked and adjusted through the driving mechanism, so that the four propeller assemblies 29 are synchronously retracted. At this time, the propeller assembly 29 is below the drone body 1 and is in a state of being close to the drone body 1. At this time, the overall space occupied by the drone is small. During the ascending flight, the drone body 1 can be used to break through the obstacles on the top to prevent the propeller assembly 29 from directly colliding with the obstacles, thereby affecting the overall flight stability of the drone. When the drone descends and the flight space below encounters an obstacle, similarly, the propeller assembly 29 is raised relative to the drone body 1 and then retracted, so that during the descending flight, obstacles can be avoided from interfering with the propeller assembly 29, thereby improving the protection of the propeller assembly 29, and firstly, in a specific flight environment, the drone can change its own shape to adapt to the flight environment.

[0045] As a further solution of the present invention, expansion tubes 4 are integrally formed at the four corners of the UAV fuselage 1, and protective net plates 5 are installed on the inner walls of the four expansion tubes 4. An adjustment frame 6 is integrally formed on the UAV fuselage 1, and a landing gear 7 is symmetrically installed at the bottom of the UAV fuselage 1. The adjustment frame 6 is connected to the lifting mechanism and the driving mechanism.

[0046] In this embodiment, the expansion tube 4 arranged at the four corners of the drone body 1 can change its shape. The propeller assembly 29 is located above or below the drone body 1. When the propeller assembly 29 operates to generate airflow, the airflow can flow through the expansion tube 4 to achieve flight lift and ensure the flight effect. The protective net plate 5 arranged inside the expansion tube 4 can prevent obstacles from entering from the expansion tube 4 during obstacle crossing, thereby affecting the operation of the propeller assembly 29. The adjustment frame 6 is arranged to meet the adjustment effect and achieve a change in shape. The landing gear 7 at the bottom of the drone body 1 can meet the support needs of the drone during landing and ensure landing stability.

[0047] As a further solution of the present invention, the lifting mechanism includes a first motor 8 installed at the top center of the adjusting frame 6 and a first screw 9 rotatably connected to the central cavity of the adjusting frame 6, and one end of the first screw 9 is coaxially fixed to the transmission shaft of the first motor 8;

[0048] The first screw rod 9 is threadedly connected to the lifting rod 10 , and the lifting rod 10 is slidably connected in the adjustment frame 6 .

[0049] In this embodiment, when the first motor 8 is in operation, the first screw 9 can be caused to rotate inside the adjusting frame 6. Since the first screw 9 is threadedly connected to the lifting rod 10, and the lifting rod 10 is slidably connected in the adjusting frame 6, the lifting rod 10 can be limited by the adjusting frame 6 so that it can only move vertically. Therefore, when the first motor 8 is in operation, the first screw 9 can be threadedly driven to cause the lifting rod 10 to be raised and lowered in the adjusting frame 6 by rotating, thereby meeting the adjustment requirements.

[0050] As a further solution of the present invention, the driving mechanism includes a second motor 11 installed at the bottom center of the adjusting frame 6 and two prismatic transmission rods 14 arranged on both sides of the second motor 11 and rotatably connected to the cavity of the adjusting frame 6;

[0051] A first gear 12 is fixedly connected to the transmission shaft of the second motor 11, and the two sides of the first gear 12 are respectively meshed with two second gears 13. The two second gears 13 are coaxially fixed to the bottoms of the two prismatic transmission rods 14, and the two prismatic transmission rods 14 are slidably connected to the lifting rod 10. The lifting rod 10 is provided with a slot hole with an aperture larger than the diameter of the prismatic transmission rod 14.

[0052] In this embodiment, since the lifting rod 10 is provided with two slots with a diameter larger than that of the prismatic transmission rod 14, the prismatic transmission rod 14 can rotate freely in the slots provided on the lifting rod 10. Therefore, when the lifting rod 10 is lifted or lowered, the slots are lifted or lowered on the prismatic transmission rod 14 without affecting the lifting or lowering adjustment of the lifting rod 10. The second motor 11 is operated to rotate the coaxially fixed first gear 12, and the first gear 12 engages with the second gears 13 on both sides to rotate it. The two prismatic transmission rods 14 rotate in the cavity of the adjustment frame 6, so that the two prismatic transmission rods 14 can rotate in the slots provided on the lifting rod 10, thereby meeting the driving requirements.

[0053] As a further solution of the present invention, the driving mechanism further comprises two first bevel gears 15 respectively slidably mounted on the two prismatic transmission rods 14, and two second bevel gears 16 respectively meshing with the two first bevel gears 15;

[0054] The two second bevel gears 16 are respectively fixedly connected to one end of two second screw rods 17, and the other ends of the two second screw rods 17 are each provided with a plug-in hole 18;

[0055] The first bevel gear 15 and the second bevel gear 16 are both rotatably connected in the cavity of the lifting rod 10 .

[0056] In this embodiment, the first bevel gear 15 is slidably mounted on the prismatic transmission rod 14, and the first bevel gear 15 and the second bevel gear 16 remain rotationally connected in the cavity of the lifting rod 10. Therefore, when the lifting rod 10 is raised or lowered, the first bevel gear 15 and the second bevel gear 16 will be raised or lowered synchronously, and when the prismatic transmission rod 14 rotates, the first bevel gear 15 can be rotated, and the first bevel gear 15 engages with the second bevel gear 16 to drive the second screw 17 to rotate together, thereby meeting the transmission usage requirements.

[0057] As a further solution of the present invention, the telescopic mechanism includes a plug-in rod 19 slidably plugged into the plug-in hole 18 and a third bevel gear 20 fixedly connected to one end of the plug-in rod 19;

[0058] The third bevel gear 20 is rotatably connected in the cavity of the T-frame 23. A sliding cavity 24 is opened in the T-frame 23 at the position of the plug-in rod 19. A cylinder 25 is fixedly connected inside the sliding cavity 24. The sliding cavity 24 is slidably plugged with the lifting rod 10, and the cylinder 25 is threadedly connected to the second screw 17.

[0059] In this embodiment, when the second screw 17 rotates, since the second screw 17 is threadedly connected to the first bevel gear 15 fixedly connected to the inner wall of the T-frame 23, and the sliding cavity 24 is slidably inserted on the lifting rod 10, when the second screw 17 rotates, it can be threadedly adjusted to make the cylinder 25 slide and adjust on the lifting rod 10, thereby controlling the distance from the T-frame 23 to the center of the lifting rod 10 to meet the telescopic adjustment. The plug-in hole 18 opened on the second screw 17 is slidably inserted with a plug-in rod 19, and the plug-in rod 19 is prismatically set, and the plug-in hole 18 corresponds to the plug-in rod 19. The third bevel gear 20 fixed at one end of the plug-in rod 19 is rotatably connected in the cavity of the T-frame 23. Therefore, when the T-frame 23 approaches or moves away from the lifting rod 10, the plug-in rod 19 will be inserted in the plug-in hole 18 to meet the transmission after telescopic adjustment. When the second screw 17 is rotated and adjusted, the plug-in rod 19 can be rotated together to achieve the transmission effect and meet the linkage adjustment.

[0060] As a further solution of the present invention, the telescopic mechanism also includes protrusions 26 symmetrically fixed on the inner walls at both ends of the T-frame 23 and two extension rods 27 slidably inserted in the T-frame 23 at both ends of the protrusions 26, and the outer walls of the two extension rods 27 are provided with recesses 28 corresponding to the protrusions 26.

[0061] In this embodiment, the protrusions 26 are arranged on the inner walls at both ends of the T-shaped frame 23, and the recesses 28 are opened on the extension rod 27 corresponding to the protrusions 26. Therefore, the extension rod 27 can only be horizontally plugged and adjusted in the protrusions 26, and rotational adjustment cannot be achieved. By plugging the extension rod 27 in the T-shaped frame 23, the combined length of the T-shaped frame 23 and the extension rod 27 can be controlled to meet the telescopic adjustment control. According to different flight needs, the shape of the drone itself can be changed to meet the flight needs of multiple conditions.

[0062] As a further solution of the present invention, one end of the two extension rods 27 is threadedly connected to the third screw 22, one end of the third screw 22 is fixed to the fourth bevel gear 21, and the two fourth bevel gears 21 are symmetrically rotatably connected in the cavity at the center of the T-frame 23. A propeller assembly 29 is installed on the extension rod 27, and the two fourth bevel gears 21 are arranged on both sides of the third bevel gear 20 and meshed with it.

[0063] In this embodiment, the fourth bevel gear 21 is meshed with the third bevel gear 20. The second motor 11 can drive the third bevel gear 20 to rotate through the linkage of various components when it is in operation, thereby causing the fourth bevel gear 21 to rotate. Since the fourth bevel gear 21 is rotatably connected in the cavity of the T-frame 23, and the third screw 22 is threadedly connected to the extension rod 27, and because the extension rod 27 can only be horizontally slidably adjusted in the T-frame 23, when the third screw 22 rotates, the extension rod 27 can be slid and telescopically adjusted. By controlling the extension length of the extension rod 27, multiple propeller assemblies 29 can be synchronously approached or moved away, meeting the change of their own shape, and are suitable for adjustment and use in different flight environments.

[0064] The above embodiments are exemplary rather than restrictive, so the technical solutions of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention are all included in the present invention.

Claims

1. A drone based on morphing, comprising a drone body (1), a switch button (2) arranged at one end of the drone body (1), a gimbal (3) arranged at the other end of the drone body (1), and four propeller assemblies (29) arranged on the drone body (1), characterized in that: The drone fuselage (1) is provided with a lifting and telescopic structure, and the lifting and telescopic structure is connected to the four propeller assemblies (29); The lifting and telescopic structure comprises a lifting mechanism mounted on the UAV fuselage (1), a lifting rod (10) slidably connected to the UAV fuselage (1) and connected to the lifting mechanism, a driving mechanism mounted on the UAV fuselage (1) and connected to the lifting rod (10), and two telescopic mechanisms arranged on both sides of the lifting rod (10) and connected to the driving mechanism, wherein the telescopic mechanisms are connected to a propeller assembly (29); The lifting mechanism is used to drive the lifting rod (10) to rise and fall on the UAV fuselage (1). When the lifting rod (10) is raised and lowered, it drives the telescopic mechanisms arranged on both sides to rise and fall. The driving mechanism is used to drive the two telescopic mechanisms to move synchronously. When the two telescopic mechanisms move synchronously, the four propeller assemblies (29) move closer or farther away synchronously.

2. The morphology-transforming UAV according to claim 1, characterized in that: The four corners of the UAV fuselage (1) are all integrally formed with expansion tubes (4), the inner walls of the four expansion tubes (4) are all installed with protective net plates (5), an adjustment frame (6) is integrally formed on the UAV fuselage (1), a landing gear (7) is symmetrically installed at the bottom of the UAV fuselage (1), and the adjustment frame (6) is connected to the lifting mechanism and the driving mechanism.

3. The morphology-transforming UAV according to claim 2, characterized in that: The lifting mechanism comprises a first motor (8) installed at the center of the top of the adjusting frame (6) and a first screw rod (9) rotatably connected to the central cavity of the adjusting frame (6), one end of the first screw rod (9) being coaxially fixed to the transmission shaft of the first motor (8); The first screw rod (9) is threadedly connected to the lifting rod (10), and the lifting rod (10) is slidably connected in the adjustment frame (6).

4. The morphology-transforming UAV according to claim 2, characterized in that: The driving mechanism comprises a second motor (11) installed at the center of the bottom of the adjusting frame (6) and two prismatic transmission rods (14) arranged on both sides of the second motor (11) and rotatably connected to the cavity of the adjusting frame (6); A first gear (12) is fixedly connected to the transmission shaft of the second motor (11); two sides of the first gear (12) are respectively meshed with two second gears (13); the two second gears (13) are respectively coaxially fixed to the bottoms of the two prismatic transmission rods (14); the two prismatic transmission rods (14) are slidably connected to the lifting rod (10); and a slotted hole having a diameter larger than the diameter of the prismatic transmission rod (14) is provided on the lifting rod (10).

5. The morphology-transforming UAV according to claim 4, characterized in that: The driving mechanism further comprises two first bevel gears (15) respectively slidably mounted on the two prismatic transmission rods (14), and two second bevel gears (16) respectively meshing with the two first bevel gears (15); The two second bevel gears (16) are respectively fixedly connected to one end of the two second screw rods (17), and the other ends of the two second screw rods (17) are each provided with a plug-in hole (18); The first bevel gear (15) and the second bevel gear (16) are both rotatably connected in the cavity of the lifting rod (10).

6. The morphology-transforming UAV according to claim 1, characterized in that: The telescopic mechanism comprises a plug-in rod (19) slidably plugged into the plug-in hole (18) and a third bevel gear (20) fixedly connected to one end of the plug-in rod (19); The third bevel gear (20) is rotatably connected in the cavity of the T-frame (23); a sliding cavity (24) is provided in the T-frame (23) at the location of the plug-in rod (19); a cylinder (25) is fixedly connected inside the sliding cavity (24); the sliding cavity (24) is slidably plugged into the lifting rod (10); and the cylinder (25) is threadedly connected to the second screw rod (17).

7. The morphology-transforming UAV according to claim 6, characterized in that: The telescopic mechanism also includes protrusions (26) symmetrically fixed on the inner walls at both ends of the T-shaped frame (23) and two extension rods (27) slidably plugged into the T-shaped frame (23) at both ends of the protrusions (26), and the outer walls of the two extension rods (27) are provided with recesses (28) corresponding to the protrusions (26).

8. The morphology-transforming UAV according to claim 7, characterized in that: One end of each of the two extension rods (27) is threadedly connected to a third screw rod (22), one end of the third screw rod (22) is fixed to a fourth bevel gear (21), and the two fourth bevel gears (21) are symmetrically rotatably connected in a cavity at the center of the T-shaped frame (23).

9. The morphology-transforming UAV according to claim 7, characterized in that: A propeller assembly (29) is installed on the extension rod (27), and two fourth bevel gears (21) are arranged on both sides of the third bevel gear (20) and meshed therewith.

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