Flying car with telescopic duct

Abstract

The invention discloses a hovercar with a telescopic duct, which relates to the field of hovercars and comprises a ducted fan, a ducted fixing arm, a supporting part, a gear and a motor, the first duct fixing arm and the second duct fixing arm are connected with the supporting part in a sliding mode. The first duct fixing arm is provided with a first rack, the second duct fixing arm is provided with a second rack, and the gear is meshed with the first rack and the second rack. When the hovercar is switched to a flying state, the motor rotates forwards to drive the gear to rotate clockwise, and the first duct fixing arm and the second duct fixing arm are driven by the gear to extend in the direction away from each other. When the hovercar is switched to the road surface running state, the motor rotates reversely to drive the gear to rotate anticlockwise, and the first duct fixing arm and the second duct fixing arm are driven by the gear to contract in the direction close to each other. One gear driving mechanism is used, the ducts on the left side and the right side can be driven to stretch or contract at the same time, and the flying or landing requirement is met.

Description

Technical Field

[0001] The present invention relates to the field of flying cars, and in particular to a flying car with a retractable duct. Background Art

[0002] In the current aircraft field, flying cars have gradually become a new development direction that combines aircraft with vehicles. However, the overall dimensions of flying cars are currently difficult to achieve while meeting the target load and being suitable for driving on ordinary roads. Generally, in order to prevent the airflow of the flight power components from being blocked by the vehicle body, most power components must be arranged to exceed the width of the vehicle body, which will result in the overall size of the vehicle being too large, especially in the width direction, making it impossible to drive and take off and land smoothly on ordinary roads. However, my country's mandatory regulations require that only cars with a width of less than 2.55m are allowed to drive on the road. Therefore, reducing the overall dimensions of flying cars is a necessary condition for the successful mass production of flying cars. Summary of the invention

[0003] The present invention provides a flying car with a retractable duct, which is used to overcome at least one technical problem existing in the prior art.

[0004] The present invention provides a retractable ducted flying car, comprising: a ducted fan, a ducted fixed arm, a support part, a gear and a motor;

[0005] The duct fixing arm comprises a first duct fixing arm and a second duct fixing arm which are parallel to each other;

[0006] The support portion is fixed to the top of the flying car, and the first duct fixing arm and the second duct fixing arm are respectively slidably connected to the support portion;

[0007] The ducted fan comprises a first ducted fan and a second ducted fan, the first ducted fan is fixed to one end of the first ducted fixing arm, and the second ducted fan is fixed to one end of the second ducted fixing arm away from the first ducted fan;

[0008] The gear is located between the first duct fixing arm and the second duct fixing arm, a first rack is provided on at least a portion of the first duct fixing arm close to the gear, and a second rack is provided on at least a portion of the second duct fixing arm close to the gear, and the gear is meshed with the first rack and the second rack respectively;

[0009] The gear is connected to a motor. When the flying car switches to a flying state, the motor rotates forward to drive the gear to rotate clockwise, and the first ducted fixing arm and the second ducted fixing arm are extended in directions away from each other under the drive of the gear. When the flying car switches to a road driving state, the motor rotates reversely to drive the gear to rotate counterclockwise, and the first ducted fixing arm and the second ducted fixing arm are contracted in a direction approaching each other under the drive of the gear.

[0010] Optionally, the support portion is a dovetail groove structure, including a first dovetail groove and a second dovetail groove;

[0011] A first dovetail tenon is provided on one side of the first duct fixing arm close to the top of the flying car, and the first dovetail tenon cooperates with the first dovetail groove to form a first mortise and tenon structure;

[0012] A second dovetail tenon is provided on one side of the second duct fixing arm close to the top of the flying car, and the second dovetail tenon cooperates with the second dovetail groove to form a second mortise and tenon structure.

[0013] Optionally, the support portion is a dovetail groove structure, including a third dovetail groove and a fourth dovetail groove;

[0014] A third dovetail tenon is provided on a side of the first duct fixing arm away from the gear, and the third dovetail tenon cooperates with the third dovetail groove to form a third mortise and tenon structure;

[0015] A fourth dovetail tenon is provided on a side of the second duct fixing arm away from the gear, and the fourth dovetail tenon cooperates with the fourth dovetail groove to form a fourth mortise and tenon structure.

[0016] Optionally, it further comprises an extension limit block, wherein the extension limit block comprises a first extension limit block and a second extension limit block;

[0017] The first extension limit block is fixed on the first duct fixing arm, and the first extension limit block is located at an end of the support portion away from the first duct fan;

[0018] The second extension limit block is fixed on the second duct fixing arm, and the second extension limit block is located at an end of the support portion away from the second duct fan.

[0019] Optionally, the extension limit block is a pin structure.

[0020] Optionally, it further comprises a contraction limit block, wherein the contraction limit block comprises a first contraction limit block and a second contraction limit block;

[0021] The first shrinkage limit block is fixed on the first duct fixing arm, and the first shrinkage limit block is located between the support portion and the first duct fan;

[0022] The second shrinkage limit block is fixed on the second duct fixing arm, and the second shrinkage limit block is located between the supporting portion and the second duct fan.

[0023] Optionally, the shrinkage limit block is a pin structure.

[0024] Optionally, the duct fixing arm and the supporting portion are both solid steel structures.

[0025] Optionally, the duct fixing arm and the supporting portion are both hollow aluminum profile structures.

[0026] Optionally, the motor is fixed on the top of the flying car, and the gear is connected to the motor via a shaft.

[0027] The innovative features of the embodiments of the present invention include:

[0028] 1. In this embodiment, a set of gear drive mechanisms is used to simultaneously drive the left and right ducts to extend or contract, so that the first duct fixing arm and the second duct fixing arm maintain synchronous movement, which is beneficial to maintaining the balance of the flying car and can simplify the structure, thereby reducing the weight. This is one of the innovative points of the embodiment of the present invention.

[0029] 2. In this embodiment, gears are used to drive the extension and retraction of the first duct fixing arm and the second duct fixing arm. There is no need to sacrifice the load or the number of passengers to reduce the size of the entire vehicle. When the flying car needs to take off, the flight power device can extend outward to prevent its airflow from being blocked by the vehicle body, thereby achieving the highest efficiency; when driving on land or parking, the flight power device is shortened inward to reduce the size, improve passability and facilitate storage, which is one of the innovative points of the embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A top view of a retractable ducted flying car in a ducted state provided by an embodiment of the present invention;

[0032] Figure 2A top view of a retractable ducted flying car in a ducted state provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the structure of a retractable duct provided in an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of a structure of a ducted fan in a contracted state provided by an embodiment of the present invention;

[0035] Figure 5 A structural schematic diagram of a ducted fan in an expanded state provided by an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of a mortise and tenon structure provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0038] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0039] The embodiment of the present invention discloses a flying car with a retractable duct, which is described in detail below.

[0040] Figure 1 A top view of a retractable ducted flying car in a ducted state provided by an embodiment of the present invention, Figure 2 A top view of a retractable ducted flying car in a ducted state provided by an embodiment of the present invention, Figure 3 A schematic diagram of a structure of a retractable duct provided in an embodiment of the present invention, Figure 4 A schematic diagram of a ducted fan in a contracted state provided by an embodiment of the present invention, Figure 5 A schematic diagram of a ducted fan in an expanded state according to an embodiment of the present invention is shown in FIG. Figure 1-Figure 5 , the ducted retractable flying car provided by the embodiment of the present invention comprises: a ducted fan, a ducted fixed arm, a support part 3, a gear 4 and a motor;

[0041] The duct fixing arm includes a first duct fixing arm 20 and a second duct fixing arm 21 which are parallel to each other;

[0042] The support part 3 is fixed to the top of the flying car, and the first duct fixing arm 20 and the second duct fixing arm 21 are respectively slidably connected to the support part 3;

[0043] The ducted fan includes a first ducted fan 01 and a second ducted fan 02. The first ducted fan 01 is fixed to one end of a first ducted fixed arm 20, and the second ducted fan 02 is fixed to one end of a second ducted fixed arm 21 away from the first ducted fan 01.

[0044] The gear 4 is located between the first duct fixing arm 20 and the second duct fixing arm 21. The first rack 22 is provided at least on the side of the first duct fixing arm 20 close to the gear 4. The second rack 23 is provided at least on the side of the second duct fixing arm 21 close to the gear 4. The gear 4 is meshed with the first rack 22 and the second rack 23 respectively.

[0045] The gear 4 is connected to the motor. When the flying car switches to the flying state, the motor rotates forward to drive the gear 4 to rotate clockwise, and the first ducted fixing arm 20 and the second ducted fixing arm 21 are extended in directions away from each other under the drive of the gear 4; when the flying car switches to the road driving state, the motor rotates reversely to drive the gear 4 to rotate counterclockwise, and the first ducted fixing arm 20 and the second ducted fixing arm 21 are retracted in a direction close to each other under the drive of the gear 4.

[0046] Specifically, please refer to Figure 1-Figure 5 The ducted retractable flying car provided in the embodiment of the present invention comprises a ducted fixed arm and a gear 4, wherein the ducted fixed arm comprises a first ducted fixed arm 20 and a second ducted fixed arm 21, and the first ducted fixed arm 20 and the second ducted fixed arm 21 are arranged parallel to each other. The gear 4 is arranged between the first ducted fixed arm 20 and the second ducted fixed arm 21, and racks are arranged on the sides of the first ducted fixed arm 20 and the second ducted fixed arm 21 close to the gear 4, for example, a first rack 22 is arranged on the first ducted fixed arm 20, and a second rack 23 is arranged on the second ducted fixed arm 21. In this way, the first ducted fixed arm 20 and the second ducted fixed arm 21 are both in meshing relationship with the gear 4.

[0047] The flying car with retractable duct provided in the embodiment of the present invention also includes a motor, which is fixed on the top of the flying car. In order to realize the rotation of gear 4, gear 4 is connected to the motor through an axis. When the state of the flying car needs to be changed, gear 4 is driven to rotate by the motor. For example, when the flying car is switched to the flying state, the motor is rotated forward to drive gear 4 to rotate clockwise. At this time, the first duct fixed arm 20 and the second duct fixed arm 21 are extended in directions away from each other under the drive of gear 4; when the flying car is switched to the road driving state, the motor is reversed to drive gear 4 to rotate counterclockwise. At this time, the first duct fixed arm 20 and the second duct fixed arm 21 are contracted in a direction close to each other under the drive of gear 4.

[0048] The retractable ducted flying car provided by the present invention uses a set of gear 4 driving mechanisms to simultaneously drive the ducts on the left and right sides to extend or retract, so that the first duct fixing arm 20 and the second duct fixing arm 21 maintain synchronous movement of advancing and retreating at the same time, which is beneficial to maintaining the balance of the flying car and can simplify the structure, thereby reducing the weight.

[0049] The retractable ducted flying car provided in the embodiment of the present invention also includes a ducted fan, which includes a first ducted fan 01 and a second ducted fan 02. The first ducted fan 01 is fixed to one end of the first ducted fixed arm 20, and the second ducted fan 02 is fixed to one end of the second ducted fixed arm 21 away from the first ducted fan 01. Please refer to Figure 3-Figure 5 When the duct fixing arm is converted from the extended state to the contracted state, when the first duct fixing arm 20 and the second duct fixing arm 21 are contracted to basically overlap, the size of the duct in the width direction can be minimized. At this time, the gear 4 is located in the middle area of ​​the duct fixing arm. When the duct fixing arm is converted from the contracted state to the extended state, the first duct fixing arm 20 and the second duct fixing arm 21 move in the direction opposite to the contracted state. It can be seen that the gear 4 only needs to be engaged with a part of the duct fixing arm. Therefore, when setting the first rack 22, it is only necessary to set it in a part of the first duct fixing arm 20 away from the end of the first duct fan 01, and it is not necessary to set the first rack 22 on the entire first duct fixing arm 20. Similarly, the second rack 23 also only needs to be set in a part of the second duct fixing arm 21 away from the end of the second duct fan 02. In this way, the workload of setting the first rack 22 and the second rack 23 can be effectively reduced, thereby simplifying the process and reducing costs.

[0050] In addition, since the duct fans arranged at both ends of the duct fixing arm have a certain weight, when the duct fixing arm is only engaged with the gear 4 and there is no support below, there may be a risk that the duct will fall off downward due to gravity. Therefore, the flying car provided in the embodiment of the present invention also has a support portion 3 arranged on the top of the flying car, and the first duct fixing arm 20 and the second duct fixing arm 21 are supported by the support portion 3, so as to avoid the problem that the duct falls off downward due to gravity, resulting in the inability to engage with the gear 4 for extension and retraction. In addition, since the first duct fixing arm 20 and the second duct fixing arm 21 need to perform telescopic movement, the first duct fixing arm 20 and the second duct fixing arm 21 are slidably connected to the support portion 3, that is, the first duct fixing arm 20 and the second duct fixing arm 21 can slide on the support portion 3, so as to achieve the extension and retraction of the duct while supporting.

[0051] For the retractable ducted flying car provided by the present invention, when there is no requirement for the weight of the whole vehicle, the duct fixing arm and the support part 3 can be both set as a solid steel structure. When the weight of the whole vehicle needs to be reduced, the duct fixing arm and the support part 3 can be both set as a hollow aluminum profile structure. The specific use of a hollow or solid structure can be specifically set according to actual needs, and the present invention does not limit this.

[0052] The flying car with retractable ducts provided in the embodiment of the present invention uses the gear 4 to drive the extension and retraction of the first duct fixed arm 20 and the second duct fixed arm 21, and does not need to sacrifice the load or the number of passengers to reduce the size of the whole vehicle. When the flying car needs to take off, the flying power device can be extended outward to avoid its airflow being blocked by the vehicle body, thereby obtaining the highest efficiency. When driving on land or parking, the flying power device is shortened inward, similar to folding wings, reducing the size, improving the passability and facilitating storage.

[0053] Optionally, Figure 6 For a schematic diagram of the mortise and tenon structure provided in an embodiment of the present invention, please refer to Figure 3-Figure 6 In this embodiment, the support portion 3 is a dovetail groove structure, including a first dovetail groove 31 and a second dovetail groove 32; a first dovetail tenon 24 is provided on the side of the first duct fixing arm 20 close to the top of the flying car, and the first dovetail tenon 24 cooperates with the first dovetail groove 31 to form a first mortise and tenon structure; a second dovetail tenon 25 is provided on the side of the second duct fixing arm 21 close to the top of the flying car, and the second dovetail tenon 25 cooperates with the second dovetail groove 32 to form a second mortise and tenon structure.

[0054] Specifically, please refer to Figure 3-Figure 6In this embodiment, the support portion 3 is set to a dovetail groove structure. Since the support portion 3 is slidably connected to the first duct fixing arm 20 and the second duct fixing arm 21 respectively, the support portion 3 is divided into two parts in this embodiment, such as the first dovetail groove 31 and the second dovetail groove 32. The first dovetail groove 31 is slidably connected to the first duct fixing arm 20, and the second dovetail groove 32 is slidably connected to the second duct fixing arm 21.

[0055] In order to realize the sliding connection between the duct fixing arm and the dovetail groove, a first dovetail tenon 24 is provided on the side of the first duct fixing arm 20 close to the top of the flying car, and a second dovetail tenon 25 is provided on the side of the second duct fixing arm 21 close to the top of the flying car, so that the first dovetail tenon 24 cooperates with the first dovetail groove 31 to form a first tenon-tenon structure, and the second dovetail tenon 25 cooperates with the second dovetail groove 32 to form a second tenon-tenon structure. In this way, not only can the duct fixing arm and the dovetail groove be slidably connected to realize the extension and contraction of the duct, but also the duct fixing arm can be prevented from shaking in other directions during the extension and contraction process, that is, all degrees of freedom of the duct fixing arm except for the left and right translation are limited, thereby ensuring the firmness and stability of the duct fixing arm.

[0056] Optionally, refer to Figure 3-Figure 6 The support part 3 is a dovetail groove structure, including a third dovetail groove and a fourth dovetail groove; a third dovetail tenon is provided on the side of the first duct fixing arm 20 away from the gear 4, and the third dovetail tenon cooperates with the third dovetail groove to form a third mortise and tenon structure; a fourth dovetail tenon is provided on the side of the second duct fixing arm 21 away from the gear 4, and the fourth dovetail tenon cooperates with the fourth dovetail groove to form a fourth mortise and tenon structure.

[0057] Specifically, please refer to Figure 3-Figure 6 In this embodiment, the support portion 3 is set to a dovetail groove structure. Since the support portion 3 is slidingly connected to the first duct fixing arm 20 and the second duct fixing arm 21 respectively, the support portion 3 is divided into two parts in this embodiment, such as a third dovetail groove and a fourth dovetail groove. The third dovetail groove is slidingly connected to the first duct fixing arm 20, and the fourth dovetail groove is slidingly connected to the second duct fixing arm 21.

[0058] In order to realize the sliding connection between the duct fixing arm and the dovetail groove, the present embodiment also provides dovetail tenons on the first duct fixing arm 20 and the second duct fixing arm 21. However, unlike the previous embodiment, the dovetail tenons are provided on the side of the duct fixing arm in the present embodiment. For example, a third dovetail tenon is provided on the side of the first duct fixing arm 20 away from the gear 4, and a fourth dovetail tenon is provided on the side of the second duct fixing arm 21 away from the gear 4. The third dovetail tenon cooperates with the third dovetail groove to form a third mortise and tenon structure, and the fourth dovetail tenon cooperates with the fourth dovetail groove to form a fourth mortise and tenon structure. In this way, the duct fixing arm and the dovetail groove can be slidably connected to realize the extension and contraction of the duct, and the shaking of the duct fixing arm in other directions during the extension and contraction process can be avoided, that is, all degrees of freedom of the duct fixing arm except for the left and right translation are limited, thereby ensuring the firmness and stability of the duct fixing arm.

[0059] It should be noted that Figure 6 The mortise and tenon structure shown is only a schematic illustration of the present invention and is not intended to be a limitation of the present invention. The size structure of the dovetail groove and the dovetail tenon can be specifically set according to actual needs, and the present invention does not make any specific limitations on this.

[0060] Optionally, refer to Figure 5 The ducted retractable flying car provided in this embodiment further includes an extension limit block, which includes a first extension limit block 26 and a second extension limit block 27; the first extension limit block 26 is fixed to the first duct fixed arm 20, and the first extension limit block 26 is located at an end of the support part 3 away from the first duct fan 01; the second extension limit block 27 is fixed to the second duct fixed arm 21, and the second extension limit block 27 is located at an end of the support part 3 away from the second duct fan 02. Preferably, the extension limit block is a pin structure.

[0061] Specifically, please refer to Figure 5The ducted retractable flying car provided in this embodiment is provided with a first extension stopper 26 and a second extension stopper 27 on the first ducted fixed arm 20 and the second ducted fixed arm 21, respectively. The first extension stopper 26 is located at the end of the support part 3 away from the first ducted fan 01, and the second extension stopper 27 is located at the end of the support part 3 away from the second ducted fan 02. That is, the first extension stopper 26 is arranged at the end of the first ducted fixed arm 20 away from the first ducted fan 01, and the second extension stopper 27 is arranged at the end of the second ducted fixed arm 21 away from the second ducted fan 02. During the extension process, when the first extension stopper 26 and the second extension stopper 27 are extended to interfere with the support part 3 fixed on the roof, the first ducted fixed arm 20 and the second ducted fixed arm 21 are extended to the position, the ducted fan has been fully exposed, the ducted airflow will not be blocked by the vehicle body, and it is in a flying state. Here, the extension stopper is a pin structure. It should be noted that setting the extension limit block as a pin structure is only an implementation method in this embodiment and is not intended to be a limitation of the present invention. In other embodiments, the extension limit block may also be set to other structures, such as screws.

[0062] Optionally, refer to Figure 5 In the retractable ducted flying car provided in this embodiment, a first retractable stopper 28 and a second retractable stopper 29 are respectively provided on the first ducted fixed arm 20 and the second ducted fixed arm 21; the first retractable stopper 28 is fixed on the first ducted fixed arm 20, and the first retractable stopper 28 is located between the support portion 3 and the first ducted fan 01; the second retractable stopper 29 is fixed on the second ducted fixed arm 21, and the second retractable stopper 29 is located between the support portion 3 and the second ducted fan 02. Preferably, the retractable stopper is a pin structure.

[0063] Specifically, please refer to Figure 5 The retractable ducted flying car provided in this embodiment also includes a retractable limit block, which includes a first retractable limit block 28 and a second retractable limit block 29. Among them, the first retractable limit block 28 is located between the support part 3 and the first ducted fan 01, and the second retractable limit block 29 is located between the support part 3 and the second ducted fan 02. During the retraction process, when the first retractable limit block 28 and the second retractable limit block 29 are retracted to interfere with the support part 3 fixed on the roof respectively, the first duct fixed arm 20 and the second duct fixed arm 21 are retracted into place, and the outer contour size is the smallest at this time, which is conducive to improving the passability and facilitating storage. Here, the retractable limit block is a pin structure. It should be noted that setting the retractable limit block as a pin structure is only an implementation method in this embodiment, and is not intended to be a limitation of the present invention. In other embodiments, the extension limit block can also be set to other structures, such as screws.

[0064] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0065] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flying car with a retractable duct, characterized in that: include: Ducted fan, ducted fixing arm, support, gear and motor; The duct fixing arm comprises a first duct fixing arm and a second duct fixing arm which are parallel to each other; The support portion is fixed to the top of the flying car, and the first duct fixing arm and the second duct fixing arm are respectively slidably connected to the support portion; The ducted fan comprises a first ducted fan and a second ducted fan, the first ducted fan is fixed to one end of the first ducted fixing arm, and the second ducted fan is fixed to one end of the second ducted fixing arm away from the first ducted fan; The gear is located between the first duct fixing arm and the second duct fixing arm, a first rack is provided on at least a portion of the first duct fixing arm close to the gear, and a second rack is provided on at least a portion of the second duct fixing arm close to the gear, and the gear is meshed with the first rack and the second rack respectively; The gear is connected to a motor. When the flying car switches to a flying state, the motor rotates forward to drive the gear to rotate clockwise, and the first ducted fixing arm and the second ducted fixing arm are extended in directions away from each other under the drive of the gear. When the flying car switches to a road driving state, the motor rotates reversely to drive the gear to rotate counterclockwise, and the first ducted fixing arm and the second ducted fixing arm are contracted in a direction approaching each other under the drive of the gear.

2. The retractable ducted flying car according to claim 1, characterized in that: The support portion is a dovetail groove structure, including a first dovetail groove and a second dovetail groove; A first dovetail tenon is provided on one side of the first duct fixing arm close to the top of the flying car, and the first dovetail tenon cooperates with the first dovetail groove to form a first mortise and tenon structure; A second dovetail tenon is provided on one side of the second duct fixing arm close to the top of the flying car, and the second dovetail tenon cooperates with the second dovetail groove to form a second mortise and tenon structure.

3. The retractable ducted flying car according to claim 1, characterized in that: The support portion is a dovetail groove structure, including a third dovetail groove and a fourth dovetail groove; A third dovetail tenon is provided on a side of the first duct fixing arm away from the gear, and the third dovetail tenon cooperates with the third dovetail groove to form a third mortise and tenon structure; A fourth dovetail tenon is provided on a side of the second duct fixing arm away from the gear, and the fourth dovetail tenon cooperates with the fourth dovetail groove to form a fourth mortise and tenon structure.

4. The retractable ducted flying car according to claim 1, characterized in that: It also includes an extension limit block, wherein the extension limit block includes a first extension limit block and a second extension limit block; The first extension limit block is fixed on the first duct fixing arm, and the first extension limit block is located at an end of the support portion away from the first duct fan; The second extension limit block is fixed on the second duct fixing arm, and the second extension limit block is located at an end of the support portion away from the second duct fan.

5. The retractable ducted flying car according to claim 4, characterized in that: The extension limit block is a pin structure.

6. The retractable ducted flying car according to claim 1, characterized in that: It also includes a contraction limit block, wherein the contraction limit block includes a first contraction limit block and a second contraction limit block; The first shrinkage limit block is fixed on the first duct fixing arm, and the first shrinkage limit block is located between the support portion and the first duct fan; The second shrinkage limit block is fixed on the second duct fixing arm, and the second shrinkage limit block is located between the supporting portion and the second duct fan.

7. The retractable ducted flying car according to claim 6, characterized in that: The shrinkage limiting block is a pin structure.

8. The retractable ducted flying car according to claim 1, characterized in that: The duct fixing arm and the supporting part are both solid steel structures.

9. The retractable ducted flying car according to claim 1, characterized in that: The duct fixing arm and the supporting part are both hollow aluminum profile structures.

10. The retractable ducted flying car according to claim 1, characterized in that: The motor is fixed on the top of the flying car, and the gear is connected to the motor through a shaft.

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