Folding empennage applied to hovercar

Abstract

The invention provides a folding empennage applied to a hovercar, which comprises two tail booms connected to the tail of the hovercar in parallel; the two vertical tails are rotatably connected to the two tail booms in a one-to-one correspondence manner; and the horizontal tail is pivotally connected to the upper ends of the two vertical tails. In the implementation mode, when the vertical fin rotates towards or away from the tail of the vehicle, the horizontal tail can be driven to be folded or unfolded, switching of the folding empennage between a land running state and a flying state is achieved, and the height of the horizontal tail is adaptively adjusted. And the horizontal tail is always parallel to the horizontal plane in the rotating process of the vertical tail, and after folding is completed, the horizontal tail is attached to the vehicle body, so that wind resistance is greatly reduced, and the device is adaptive to the ground driving state.

Description

Technical Field

[0001] This invention relates to the field of flying car technology, and in particular to a folding tail wing for use in flying cars. Background Technology

[0002] Improving the efficiency of land and air transportation is an important goal in the fields of transportation and logistics. With the gradual improvement of aircraft and vehicle design, combining the two into "flying cars" can meet the needs of both air and land use.

[0003] However, there are unavoidable multiple contradictions between flight and ground driving. From a flight perspective, fixed-wing aircraft require a tail fin to provide directional and pitch stability, and it is usually positioned higher than the rear of the vehicle. But when driving on the ground, the tail fin needs to be close to the rear of the vehicle to reduce air resistance during operation.

[0004] Therefore, a new type of tail fin is needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] The summary section of this invention provides a brief overview of the concepts, which will be described in detail in the detailed description section that follows. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] Some embodiments of the present invention provide a folding tail fin for flying cars to solve the technical problems mentioned in the background section above.

[0007] Some embodiments of the present invention provide a folding tail fin for a flying car, comprising: Two tail supports are connected in parallel to the rear of the flying car; Two vertical tails are rotatably connected to two tail supports, one in each direction; The tail is horizontal and pivotally connected to the upper ends of the two vertical tails; When the folding rear wing is folded, the two vertical tails rotate toward the rear of the vehicle, and the horizontal tail rotates relative to the vertical tails, so that the horizontal tail is always parallel to the horizontal plane; after folding is completed, the horizontal tail fits into the vehicle body.

[0008] Optionally, each of the tail booms is provided with a first rotary servo; each of the vertical tails is fixed with a vertical tail fixing beam along its length, and the bottom of the vertical tail fixing beam is connected to the first rotary servo.

[0009] Optionally, each of the vertical tails is further provided with a vertical tail telescopic beam arranged parallel to the vertical tail fixing beam, and the two ends of the vertical tail telescopic beam are pivotally connected to the horizontal tail and the tail support, respectively.

[0010] Optionally, the vertical tail telescopic beam includes an upper telescopic beam, a telescopic mechanism, and a lower telescopic beam connected in sequence. The upper telescopic beam is fixed to the vertical tail, and the upper end of the upper telescopic beam is pivotally connected to the horizontal tail. The lower telescopic beam is slidably connected to the vertical tail, and the lower end of the lower telescopic beam is pivotally connected to the tail support.

[0011] Optionally, the telescopic mechanism includes an upper base that is slidably connected to the upper telescopic beam, and a lower base that is fixedly connected to the lower telescopic beam. A return spring is connected between the upper base and the lower base. A guide post is provided inside the return spring. The upper end of the guide post is fixedly connected to the upper base, and the lower end is slidably inserted into the lower base.

[0012] Optionally, the upper end of the upper base is provided with a lug, which is provided with a positioning hole and a cam bearing; a cam is provided inside the upper telescopic beam, and the upper end of the cam is rotatably connected to the upper telescopic beam. The aforementioned cam bearing is slidably connected to the cam, and the aforementioned cam is also provided with a first spring pin; When the tail is folded, the tail telescopic beam is stretched, which pulls the return spring downward and causes the upper base and lug to move downward. The cam bearing drives the cam to rotate, so that the first spring pin is inserted into the positioning hole and locks the folded position of the tail.

[0013] Optionally, each of the tail supports is also provided with a spring-opening mechanism, including a rotating base, a limiting base, and a torsion spring; The rotating base is fixedly connected to the lower telescopic beam, and the limiting base is fixedly connected to the tail support. The rotating base is rotatably fitted onto the limiting base; a torsion spring is connected between the rotating base and the limiting base.

[0014] Optionally, a second spring pin is connected to the limiting base, and an annular guide rail is provided on the side of the rotating base facing the limiting base. A limiting hole is opened in the annular guide rail, and the second spring pin is slidably connected to the annular guide rail. When the tail section is deployed, the lower telescopic beam rotates relative to the tail support, causing the rotating base to rotate relative to the limiting base. At the same time, the second spring pin slides in the annular guide rail until it is inserted into the limiting hole, thereby locking the deployed position of the tail section.

[0015] Optionally, a rotating mechanism is provided between the horizontal tail, the upper telescopic beam, and the vertical tail fixed beam. The rotating mechanism includes a vertical tail rotary joint, a second rotating servo, and a horizontal tail rotary joint. The vertical tail rotary joint is fixedly connected to the upper telescopic beam or the vertical tail fixed beam; A flat tail fixing beam is fixedly provided along the length of the flat tail, and the flat tail fixing beam is fixedly connected to the flat tail rotary joint. The second rotating servo is installed inside the vertical tail rotary joint and connected to the horizontal tail rotary joint; When the vertical stabilizer is folded, the second rotary servo drives the horizontal stabilizer rotary joint to rotate, so that the horizontal stabilizer is always parallel to the horizontal plane, so that the horizontal stabilizer can fit into the vehicle body after the vertical stabilizer is folded.

[0016] Optionally, both the vertical tail rotary joint and the horizontal tail rotary joint are provided with limit blocks; when the vertical tail is deployed, the two limit blocks engage to lock the deployed position of the horizontal tail.

[0017] The above embodiments of the present invention have the following beneficial effects: The tail support is rotatably connected to the vertical tail, and the horizontal tail assembly is pivotally connected to the upper end of the vertical tail assembly, so that when the vertical tail rotates toward or away from the rear of the vehicle, it can drive the horizontal tail to fold or unfold, realizing the switching of the folding tail wing between land driving mode and flight mode, and adaptively adjusting the height of the horizontal tail.

[0018] The horizontal stabilizer remains parallel to the horizontal plane during the rotation of the vertical stabilizer. After folding, the horizontal stabilizer fits snugly against the vehicle body, thus significantly reducing wind resistance and making it suitable for ground driving conditions. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention applied to the unfolded state of a folding tail fin of a flying car; Figure 2 This is a schematic diagram of a structural embodiment of the folded tail wing of a flying car according to the present invention; Figure 3 This is a schematic diagram of the structure of one embodiment of the vertical tail of the present invention; Figure 4 This is a schematic diagram of the structure of one embodiment of the telescopic mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of one embodiment of the spring-opening mechanism of the present invention; Figure 6 This is a schematic diagram of one embodiment of the rotating mechanism of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1. Rear of the vehicle; 2. Tail support; 21. First rotary servo; 3. Vertical tail; 31. Vertical tail fixing beam; 32. Vertical tail telescopic beam; 321. Upper telescopic beam; 322. Lower telescopic beam; 33. Telescopic mechanism; 331. Upper base; 332. Lug; 333. Lower base; 334. Return spring; 335. Guide column; 336. Cam; 337. First spring pin; 4. Spring-opening mechanism; 41. Limiting base; 42. Torsion spring; 43. Rotating base; 44. Annular guide rail; 45. Limiting hole; 46. Washer; 47. Nut; 48. Second spring pin; 5. Flat tail; 51. Flat tail fixed beam; 6. Rotating mechanism; 61. Vertical tail rotary joint; 62. Second rotating servo; 63. Horizontal tail rotary joint; 64. Limit block. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following first. Figure 1 and Figure 2 The folding tail fin of the present invention for flying cars includes two tail supports 2 connected in parallel to the rear 1 of the flying car. Each tail support 2 is rotatably connected to a vertical tail 3, and the upper ends of the two vertical tails 3 are pivotally connected to a horizontal tail 5.

[0027] The vertical tail 3 can rotate toward or away from the rear of the vehicle 1. For details, please refer to... Figures 1 to 3 Each tail support 2 is equipped with a first rotary servo 21, the drive shaft of which is connected to the bottom of the vertical tail 3. When the first rotary servo 21 is working, it can drive the vertical tail 3 to rotate around the tail support 2 toward or away from the rear of the vehicle 1.

[0028] A vertical tail fixing beam 31 can be fixed to the aforementioned vertical tail 3, and the vertical tail fixing beam 31 is arranged along the length direction of the vertical tail. The vertical tail fixing beam 31 is connected to the aforementioned first rotating servo 21. If the first rotating servo 21 is directly connected to the vertical tail 3, it will damage the structure of the vertical tail 3. Therefore, setting the vertical tail fixing beam 31 can increase the overall strength of the vertical tail 3, and also improve the strength of the connection with the first rotating servo 21, thereby improving the reliability of the folding tail fin.

[0029] Furthermore, a telescopic beam 32 is also provided on the vertical tail, which is arranged parallel to the vertical tail fixed beam 31 and away from the rear of the vehicle 1. The two ends of the telescopic beam 32 are pivotally connected to the horizontal tail 5 and the tail support 2, respectively. When the first rotary servo motor 21 drives the vertical tail 3 to rotate toward the rear of the vehicle 1, the telescopic beam 32 retracts or extends.

[0030] It should be noted that without the telescopic beam 32, relying solely on the single-point connection between the fixed beam 31 and the first rotating servo motor 21 would reduce the load-bearing capacity of the tail 3 and make it prone to swaying. However, by incorporating the telescopic beam 32, the present invention provides two connection points for the tail 3 during rotation: the fixed beam 31 and the telescopic beam 32. This increases the load-bearing capacity while limiting the swaying of the tail 3, thereby improving its stability and reliability.

[0031] The vertical tail telescopic beam 32 includes an upper telescopic beam 321, a telescopic mechanism 33, and a lower telescopic beam 322 connected in sequence. The upper telescopic beam 321 is fixed to the vertical tail 3, and its upper end is pivotally connected to the horizontal tail 5. The lower telescopic beam 322 is slidably connected to the vertical tail 3, and its lower end is pivotally connected to the tail support 2.

[0032] Please see Figure 4 The telescopic mechanism 33 includes an upper base 331 slidably connected to the upper telescopic beam 321, and a lower base 333 fixedly connected to the lower telescopic beam 322. A return spring 334 is connected between the upper base 331 and the lower base 333. A guide post 335 is provided inside the return spring 334. The upper end of the guide post 335 can be fixedly connected to the upper base 331, and the lower end can be slidably inserted into the lower base 333.

[0033] The upper end of the upper base 331 is provided with a lug 332, which has a positioning hole and a cam bearing. The upper telescopic beam 321 can be two beams spaced apart, one of which has a cam 336 on its inner wall. The upper end of the cam 336 is rotatably connected to the beam via a pivot shaft. The cam bearing is slidably connected to the edge of the cam 336. Alternatively, a cam groove can be formed on the cam 336, and the cam bearing is slidably connected to the cam groove. The cam 336 is also provided with a first spring pin 337.

[0034] When the vertical tail 3 is folded, the first rotary servo 21 drives the vertical tail 3 to rotate towards the rear of the vehicle 1. The vertical tail telescopic beam 32 is stretched, causing the return spring 334 to be pulled downward, and driving the upper base 331 and lug 332 to move downward. The aforementioned cam bearing drives the cam 336 to rotate around the pivot axis, causing the first spring pin 337 to move from its initial position toward the positioning hole. Until the first spring pin 337 is inserted into the positioning hole, the upper base 331 and the upper telescopic beam 321 are locked, the extension of the vertical tail telescopic beam 32 is stopped, and the folded position of the vertical tail 3 is locked.

[0035] When the vertical tail 3 deploys, i.e., the first rotating servo 21 drives the vertical tail 3 to rotate away from the rear of the vehicle 1, the first spring pin 337 needs to be pulled out of the positioning hole first. The vertical tail telescopic beam 32 retracts, and the return spring 334 gradually returns to its original position, thereby causing the upper base 331 and lug 332 to move upward. The aforementioned cam bearing will drive the cam 336 to rotate around the pivot axis, causing the first spring pin 337 to move away from the positioning hole and return to its initial position.

[0036] Please see Figure 5 The tail support 2 is also equipped with a spring-opening mechanism 4, which is connected to the lower telescopic beam 322 mentioned above. This mechanism is used to realize the pivotal connection between the lower telescopic beam 322 and the tail support 2, and to lock the deployment position of the vertical tail.

[0037] The aforementioned spring-opening mechanism 4 includes a rotating base 43, a limiting base 41, a torsion spring 42, and a second spring pin 48. The rotating base 43 is fixedly connected to the lower telescopic beam 322, and the limiting base 41 is fixedly connected to the tail support 2.

[0038] A rotating base 43 is rotatably fitted onto a limiting base 41. A washer 46 and a nut 47 can be fitted onto one end of the limiting base 41 extending beyond the rotating base 43 to limit the position of the limiting base 41. A torsion spring 42 connects the rotating base 43 and the limiting base 41. The aforementioned second spring pin 48 is connected to the limiting base 41. An annular guide rail 44 is provided on the side of the rotating base 43 facing the limiting base 41. A limiting hole 45 is formed in the annular guide rail 44, and the aforementioned second spring pin 48 is slidably connected to the annular guide rail 44.

[0039] When the vertical stabilizer 3 is deployed, the first rotating servo motor 21 drives the vertical stabilizer 3 to rotate away from the rear of the vehicle 1, and the lower telescopic beam 322 rotates relative to the tail support 2, causing the rotating base 43 to rotate relative to the limiting base 41, thereby torsion spring 42. At the same time, the second spring pin 48 slides from its initial position in the annular guide rail 44. After the vertical stabilizer 3 is fully deployed, the second spring pin 48 is inserted into the limiting hole 45, thereby stopping the relative rotation between the rotating base 43 and the limiting base 41 and locking the deployed position of the vertical stabilizer 3.

[0040] When the vertical tail 3 folds, i.e., the first rotary servo 21 drives the vertical tail 3 to rotate towards the rear of the vehicle 1, the second spring pin 48 needs to be pulled out of the limiting hole 45 first. Under the action of the first rotary servo 21 and the torsion spring 42, the rotating base 43 rotates relative to the limiting base 41, and the second spring pin 48 slides away from the limiting hole 45 in the annular guide rail 44. After the vertical tail 3 is folded, the second spring pin 48 returns to its initial position. Therefore, the torsion spring 42 can provide power for the folding of the vertical tail 3, thereby reducing the power consumption of the first rotary servo 21.

[0041] By setting the telescopic mechanism 33 and the pop-out mechanism 4, the folding position and unfolded position of the vertical tail 3 can be locked respectively, preventing the vertical tail 3 from shaking, thereby improving the stability and reliability of the folding tail wing in the folded and unfolded states.

[0042] Please see Figure 6 A rotating mechanism 6 can be provided between the horizontal stabilizer 5, the upper telescopic beam 321, and the upper end of the vertical stabilizer fixed beam 31. This rotating mechanism includes a vertical stabilizer rotary joint 61, a second rotating servo motor 62, and a horizontal stabilizer rotary joint 63. Taking the rotating mechanism 6 between the horizontal stabilizer 5 and the upper telescopic beam 321 as an example, the vertical stabilizer rotary joint 61 is fixedly connected to the upper telescopic beam 321. Two horizontal stabilizer fixed beams 51 can be fixed along the length direction of the horizontal stabilizer 5 to enhance the overall strength of the horizontal stabilizer 5. The aforementioned horizontal stabilizer fixed beams 51 can be fixedly connected to the horizontal stabilizer rotary joint 63.

[0043] The second rotary servo 62 is installed inside the vertical tail rotary joint 61, and its drive shaft is connected to the horizontal tail rotary joint 63. When the vertical tail 3 is folded, the second rotary servo 62 drives the horizontal tail rotary joint 63 to rotate, so that the horizontal tail 5 is always parallel to the horizontal plane. Thus, after the vertical tail 3 is folded, the horizontal tail 5 can fit against the vehicle body, thereby reducing wind resistance when driving on the ground.

[0044] Furthermore, both the vertical tail rotary joint 61 and the horizontal tail rotary joint 63 are provided with limiting blocks 64. After the vertical tail 3 is deployed, the two limiting blocks 64 engage, thereby locking the deployed position of the horizontal tail 5.

[0045] When the flying car switches from flight mode to land driving mode, the folding tail fin transforms from an deployed state to a folded state.

[0046] The second spring pin 48 is pulled out of the limiting hole 45, and the vertical tail fixing beam 31 is driven to rotate toward the rear of the vehicle 1 by the first rotating servo 21. During the rotation, the first rotating servo 21 and the torsion spring 42 cause the rotating base 43 to rotate relative to the limiting base 41, and the second spring pin 48 slides away from the limiting hole 45 in the annular guide rail 44.

[0047] The extension of the vertical tail telescopic beam 32 causes the return spring 334 to be pulled downward, which in turn causes the upper base 331 and lug 332 to move downward. The aforementioned cam bearing drives the cam 336 to rotate around the pivot axis, causing the first spring pin 337 to move from its initial position toward the positioning hole.

[0048] The second rotating servo motor 62 drives the horizontal tail rotary joint 63 to rotate, so that the horizontal tail 5 is always parallel to the horizontal plane.

[0049] It should be noted that the aforementioned first rotating servo 21 and second rotating servo 62 can have a locking function. When the folding tail wing is fully folded, the first rotating servo 21 and second rotating servo 62 lock, the first spring pin 337 is inserted into the positioning hole, locking the upper base 331 and the upper telescopic beam 321, stopping the extension of the vertical tail telescopic beam 32, and locking the folding position of the vertical tail 3. The horizontal tail 5 remains horizontal and can fit snugly against the vehicle body, thereby reducing wind resistance during ground driving.

[0050] When the flying car switches from land driving mode to flight mode, the folding tail fin transforms from a folded state to an unfolded state.

[0051] The first spring pin 337 is pulled out of the positioning hole, and the vertical tail fixed beam 31 is driven to rotate away from the rear of the vehicle 1 by the first rotating servo motor 21. During the rotation, the lower telescopic beam 322 rotates relative to the tail support 2, causing the rotating base 43 to rotate relative to the limiting base 41, thereby torturing the torsion spring 42. At the same time, the second spring pin 48 slides from its initial position toward the limiting hole in the annular guide rail 44.

[0052] As the vertical tail telescopic beam 32 retracts, the return spring 334 gradually returns to its original position, thereby causing the upper base 331 and lug 332 to move upward. The aforementioned cam bearing drives the cam 336 to rotate around the pivot axis, causing the first spring pin 337 to move away from the positioning hole and return to its initial position.

[0053] The second rotating servo motor 62 drives the horizontal tail rotary joint 63 to rotate, so that the horizontal tail 5 is always parallel to the horizontal plane.

[0054] Once the folding tail fin has fully deployed, the first rotary servo 21 and the second rotary servo 62 lock in place. The second spring pin 48 is inserted into the limiting hole 45, thereby stopping the relative rotation between the rotating base 43 and the limiting base 41, locking the deployed position of the vertical stabilizer 3. The two limiting blocks 64 engage to lock the deployed position of the horizontal stabilizer 5.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A folding tail wing applied to an air car, characterized in that, The utility model relates to a folding tail wing of a flying car, comprising: two tail supports connected in parallel to the rear of the flying car; two vertical tails each rotatably connected to a tail support; a horizontal tail pivotally connected to the upper ends of the vertical tails; when the folding tail wing is folded, the vertical tails are rotated towards the rear of the flying car, and the horizontal tail is rotated relative to the vertical tails so that the horizontal tail is always parallel to the horizontal plane; after folding is completed, the horizontal tail is attached to the body of the flying car.

2. The folding tail wing according to claim 1, characterized in that A first rotary servo is arranged on each tail support; a vertical tail fixed beam is fixed along the length of each vertical tail, and the bottom of the vertical tail fixed beam is connected to the first rotary servo.

3. The folding tailplane according to claim 2, wherein, A vertical tail telescopic beam is further arranged on each vertical tail and parallel to the vertical tail fixed beam, and the two ends of the vertical tail telescopic beam are pivotally connected to the horizontal tail and the tail support respectively.

4. The folding tailplane according to claim 3, wherein, The vertical tail telescopic beam comprises an upper telescopic beam, a telescopic mechanism and a lower telescopic beam connected in sequence; the upper telescopic beam is fixed to the vertical tail, the upper end of the upper telescopic beam is pivotally connected to the horizontal tail, and the lower telescopic beam is slidably connected to the vertical tail, and the lower end of the lower telescopic beam is pivotally connected to the tail support.

5. The folding tailplane according to claim 4, wherein, The telescopic mechanism comprises an upper base slidably connected to the upper telescopic beam and a lower base fixedly connected to the lower telescopic beam; a return spring is connected between the upper base and the lower base, a guide column is arranged in the return spring, the upper end of the guide column is fixedly connected to the upper base, and the lower end of the guide column is slidably inserted into the lower base.

6. The folding tailplane according to claim 5, wherein, The upper end of the upper base is provided with a lug, the lug is provided with a positioning hole and a cam bearing, a cam is arranged in the upper telescopic beam, and the upper end of the cam is rotatably connected to the upper telescopic beam; the cam bearing and the cam are slidably connected, and a first spring pin is further arranged on the cam; when the vertical tail is folded, the vertical tail telescopic beam is stretched, the return spring is pulled downward, the upper base and the lug are driven to move downward, the cam bearing drives the cam to rotate, the first spring pin is inserted into the positioning hole, and the folding position of the vertical tail is locked.

7. The folding tailplane according to claim 6, wherein, A pop-up mechanism is further arranged on each tail support and comprises a rotary base, a limiting base and a torsional spring; the rotary base is fixedly connected to the lower telescopic beam, and the limiting base is fixedly connected to the tail support; the rotary base is rotatably sleeved to the limiting base, and the torsional spring is connected between the rotary base and the limiting base.

8. The folding tailplane according to claim 7, characterised in that, A second spring pin is connected to the limiting base, the side of the rotary base facing the limiting base is provided with an annular guide rail, a limiting hole is formed in the annular guide rail, and the second spring pin is slidably connected into the annular guide rail; when the vertical tail is unfolded, the lower telescopic beam is rotated relative to the tail support, the rotary base is rotated relative to the limiting base, the second spring pin slides in the annular guide rail until it is inserted into the limiting hole, and the unfolding position of the vertical tail is locked.

9. The folding tailplane according to claim 8, characterised in that, A rotating mechanism is arranged between the horizontal tail, the upper telescopic beam and the vertical tail fixed beam, and the rotating mechanism comprises a vertical tail rotating joint, a second rotary servo and a horizontal tail rotating joint; the vertical tail rotating joint is fixedly connected to the upper telescopic beam or the vertical tail fixed beam; a horizontal tail fixed beam is fixed along the length of the horizontal tail, and the horizontal tail fixed beam is fixedly connected to the horizontal tail rotating joint; the second rotary servo is arranged in the vertical tail rotating joint and connected to the horizontal tail rotating joint. When the vertical tail is folded, the second rotary rudder drives the horizontal tail rotary joint to rotate, so that the horizontal tail is always parallel to the horizontal plane, so that the horizontal tail can be attached to the vehicle body after the vertical tail is folded.

10. The folding tailplane according to claim 9, characterised in that, The vertical tail rotary joint and the horizontal tail rotary joint are both provided with a limiting block; after the vertical tail is unfolded, the two limiting blocks are engaged to lock the unfolded position of the horizontal tail.

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