A vertical take-off and landing air vehicle

Abstract

The application discloses a vertical take-off and landing flying automobile, which comprises a vehicle body, a power system and wheels; the top of the vehicle body is provided with a wing, and the tail of the vehicle body is provided with a vertical tail; the wing is used for providing the flying automobile with aerodynamic lift, and the vertical tail changes the direction of airflow; the wing is internally provided with a head multi-stage axial flow ducted fan, a middle multi-stage axial flow ducted fan and a tail multi-stage axial flow ducted fan; the jet directions of the head multi-stage axial flow ducted fan, the middle multi-stage axial flow ducted fan and the tail multi-stage axial flow ducted fan are adjustable, so as to realize the vertical take-off and landing and the adjustment of the flight posture of the flying automobile; and the power system provides power for the walking of the flying automobile, the head multi-stage axial flow ducted fan, the middle multi-stage axial flow ducted fan, the tail multi-stage axial flow ducted fan and the vertical tail. The flying automobile can drive on the ground and also can vertically take off and land in place.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of vehicles, in particular to a vertical take-off and landing flying car. BACKGROUND

[0002] As a kind of vehicle that can travel on the ground and fly in the air, the flying car is more and more favored by people, and the flying car can be mainly divided into three categories: folding wing type flying car, multi-rotor type flying car and self-rotor type flying car.

[0003] The flying car is different from the airplane, and when designing the airplane, only the flight problem is considered, the wing length of the airplane is generally much larger than the width of the cabin, and the tail of the airplane is relatively long. However, the flying car also needs to consider ground travel, and the flying car needs to meet the ground regulation requirements when traveling on the ground, that is, the overall size of the machine cannot be too large, especially the width of the vehicle cannot be too large. However, in some existing flying cars, the power consumption is large when flying, and a long runway may be needed for the take-off and landing of the flying car. In addition, in some prior art, the flying car is arranged with a fixed wing, and the space occupied by the fixed wing is large.

[0004] From the perspective of flight efficiency, it is more reasonable for the flying vehicle to adopt a wing member layout similar to that of an airplane when flying horizontally, and the wing can more efficiently generate sufficient lift. In the existing flying vehicle, the tilt-rotor scheme has great difficulty in controlling the mode switching between vertical take-off and horizontal flight cruising, and safety accidents are prone to occur. SUMMARY

[0005] The purpose of the present application is to provide a vertical take-off and landing flying car, which can travel on the ground and vertically take off and land in place.

[0006] The technical solution for achieving the purpose of the present application is:

[0007] A vertical take-off and landing flying car, comprising a vehicle body, a power system and wheels;

[0008] The vehicle body is provided with a wing at the top and a vertical tail at the tail; the wing is used to provide aerodynamic lift for the flying car, and the vertical tail changes the direction of airflow;

[0009] The wing is provided with a multi-stage axial flow duct fan vertical lift system, comprising a head multi-stage axial flow duct fan, a middle multi-stage axial flow duct fan and a tail multi-stage axial flow duct fan; the jet direction of the head multi-stage axial flow duct fan, the middle multi-stage axial flow duct fan and the tail multi-stage axial flow duct fan is adjustable, so as to realize the vertical take-off and flight attitude adjustment of the flying car;

[0010] The power system provides power for the flying car's movement, a multi-stage axial-flow ducted fan at the head, a multi-stage axial-flow ducted fan in the middle, a multi-stage axial-flow ducted fan at the tail, and a vertical tail fin.

[0011] The significant advantages of this invention compared to existing technologies are:

[0012] (1) It adopts two sets of fuel engine power systems, retaining the high energy of fuel and possessing the long endurance characteristic of fuel engines. It is equipped with eight multi-stage axial-flow ducted fans and one tail-mounted ducted fan to improve flight safety. Even if one fuel engine fails or one multi-stage axial-flow ducted fan stops working, the remaining fuel engine and seven multi-stage axial-flow ducted fans can ensure the flying car can land safely. It can also use the tail-mounted ducted fan as forward thrust and the short, thick wings as a fixed-wing aircraft for gliding landing, ensuring the personal safety of passengers.

[0013] (2) The short, stubby wing on the top of the flying car provides ample space to house eight multi-stage axial-flow ducted fans, a whole-aircraft ejection parachute, and other equipment. The large, stubby wing generates sufficient lift to increase flight endurance. The wing is foldable, reducing the failure rate. The internal multi-stage axial-flow ducted fans operate on the same basic structure and principle as axial compressors. Their key component, the "wing-like blades," does not require high-temperature operation; they only need to withstand the centrifugal force from high-speed rotation. Therefore, they can be made from relatively inexpensive materials such as aluminum and magnesium. The eight multi-stage axial-flow ducted fans are also equipped with rotatable curved nozzles that can rotate 90 degrees to the left and right, providing strong horizontal thrust during flight to further increase speed and meet customer speed demands. Another advantage is that the eight multi-stage axial-flow ducted fans do not become a "dead weight" during flight. The rear-mounted ducted fan also provides forward thrust, meeting fuel economy requirements. The two propulsion systems can operate simultaneously or independently, serving as backups for each other. Combined with a roof-mounted ejection parachute system, the flying car's safety is further enhanced.

[0014] (3) The unique multi-stage axial-flow ducted fan vertical take-off and landing system on this flying car is characterized by its eight-stage axial-flow ducted fan installation layout. The first four and last four multi-stage axial-flow ducted fans are each installed around a central point, and then connected to a fuel engine via two power distribution gearboxes and ten flexible couplings, effectively distributing eight multi-stage axial-flow ducted fans across the flying car. Compared to directly installing eight small turbojet engines, this system offers advantages such as lower fuel consumption, stronger power, lower cost, easier maintenance, and greater simplicity, reliability, and efficiency. The power distribution gearboxes and flexible couplings are technologically mature, efficient, and reliable components, making their failure virtually impossible. It can be said that the more multi-stage axial-flow ducted fans installed, the more reliable the system becomes. Therefore, the installation layout of this multi-stage axial-flow ducted fan vertical take-off and landing system can also accommodate ten, twelve, or even sixteen multi-stage axial-flow ducted fans, further enhancing the safety performance of the flying car.

[0015] (4) This flying car does not require complex and cumbersome rotor tilting mechanisms, cleverly avoiding the shortcomings of other solutions. Its eight multi-stage axial flow ducted fans and tail propulsion ducted fans are protected by the vehicle body, thus ensuring the personal safety of others around the vehicle! It is a safe and reliable flying car that can drive on the ground and take off and land vertically on the spot. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main external structure of the flying car;

[0017] Figure 2 This is a schematic diagram of the main internal structure of the flying car;

[0018] Figure 3 This is an exploded view of the main structure of a multi-stage axial-flow ducted fan on the roof of the vehicle.

[0019] Figure 4 This is a cross-sectional view of the main structure of a multi-stage axial flow ducted fan in the middle of the roof of the vehicle.

[0020] Figure 5 It is a three-view drawing and a perspective view of the main structure of a multi-stage axial flow ducted fan in the middle of the vehicle roof;

[0021] Figure 6 This is a diagram showing the main dimensions of a multi-stage axial-flow ducted fan located on the roof of the vehicle.

[0022] Figure 7 This is a schematic diagram of a fixed airfoil profile and the principle of lift generation;

[0023] Figure 8It is a 3D view of the moving impeller and stationary impeller in a multi-stage axial flow ducted fan in the middle of the vehicle roof;

[0024] Figure 9 This is an exploded view of the impeller assembly of a multi-stage axial-flow ducted fan in the middle of the roof of a vertical takeoff and landing flying car.

[0025] Figure 10 It is a cross-sectional view and a perspective view of the impeller assembly in a multi-stage axial flow ducted fan in the middle of the vehicle roof;

[0026] Figure 11 This is a schematic diagram of a multi-stage axial flow ducted fan on the roof of a vehicle, which performs work on the gas through moving blades, thereby increasing the gas's pressure energy and kinetic energy.

[0027] Figure 12 It is a 3D and exploded view of the rotatable curved nozzle gear drive assembly with 60-degree or 90-degree rotation on the left and right sides of a multi-stage axial flow ducted fan on the roof of the vehicle.

[0028] Figure 13 This is a schematic diagram of a rotatable curved nozzle on a central multi-stage axial flow ducted fan on the roof of the vehicle, which can rotate 90 degrees to the left and right.

[0029] Figure 14 It is an exploded view of the main structure of a multi-stage axial flow ducted fan on the roof of the vehicle (either at the head or tail).

[0030] Figure 15 It is a two-view drawing and a three-dimensional view of the main structure of a multi-stage axial flow ducted fan on the roof of the vehicle (either at the head or tail).

[0031] Figure 16 This is an exploded view of the main structure of a multi-stage axial-flow ducted fan vertical take-off and landing system;

[0032] Figure 17 These are the three-view and three-dimensional diagrams of the main structure of a multi-stage axial flow ducted fan vertical take-off and landing system;

[0033] Figure 18 These are exploded and three-dimensional views of the main structure of the rear power distribution gearbox in a multi-stage axial-flow ducted fan vertical take-off and landing system.

[0034] Figure 19 Exploded and three-dimensional views of the main structure of the front distribution power gearbox in the multi-stage axial flow ducted fan vertical take-off and landing system 17;

[0035] Figure 20 It is a multi-stage axial-flow ducted fan vertical take-off and landing system, which controls eight rotatable curved nozzles to achieve forward or backward flight modes.

[0036] Figure 21It is a multi-stage axial-flow ducted fan vertical take-off and landing system, which controls 8 rotatable curved nozzles to achieve left or right tilt flight modes.

[0037] Figure 22 This is a schematic diagram of a multi-stage axial-flow ducted fan vertical take-off and landing system, which controls forward or backward flight modes by controlling 8 rotatable curved nozzles.

[0038] Figure 23 This is a schematic diagram of a multi-stage axial-flow ducted fan vertical take-off and landing system, which controls eight rotatable curved nozzles to achieve take-off or landing flight modes.

[0039] Figure 24 It is a multi-stage axial-flow ducted fan vertical take-off and landing system, which controls eight rotatable curved nozzles to achieve clockwise or counterclockwise rotation flight modes.

[0040] Figure 25 This is a schematic diagram of high-pressure airflow generated in a multi-stage axial-flow ducted fan vertical take-off and landing system.

[0041] Figure 26 This is a schematic diagram of the main structure of the multi-stage axial-flow ducted fan vertical take-off and landing system installed on the roof of the vehicle;

[0042] Figure 27 It shows the side view and exploded view of the vehicle body frame, the short and thick large wing frame, and the vertical tail fin and rudder frame.

[0043] Figure 28 This is a schematic diagram of the main internal structure of the flying car, showing the vertical tail fin at the rear of the vehicle and the rudder using a servo motor to control the flying car to fly left or right.

[0044] Figure 29 This is a schematic diagram of the power transmission system for three modes: aerial flight, vertical takeoff and landing, and ground driving.

[0045] Figure 30 This is a schematic diagram of the power transmission system in flight mode;

[0046] Figure 31 This is a schematic diagram of the power transmission system for vertical take-off and landing mode;

[0047] Figure 32 This is a schematic diagram of the powertrain system in ground driving mode;

[0048] Figure 33 These are exploded and three-dimensional views of the main structure of the rear-wheel drive gear transfer case;

[0049] Figure 34 This is a 3D diagram of the main structure of a rear-wheel drive system;

[0050] Figure 35This is a 3D diagram of the main structure of the front wheel steering system;

[0051] Figure 36 This is a schematic diagram illustrating the working states of a flying car in three modes: air flight, vertical takeoff and landing, and ground driving.

[0052] Figure 37 This is a schematic diagram showing the maximum dimensions of the flying car;

[0053] Figure 38 These are the three-view drawings and a three-dimensional diagram of the flying car;

[0054] Figure 39 These are the three-view and perspective views of the front and rear doors of the flying car when opened.

[0055] Figure 40 This is a diagram illustrating passengers preparing to board the flying car.

[0056] Figure 41 This is a diagram showing the passengers already seated in the flying car. Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0058] Combination Figures 1-41 This embodiment describes a flying car that utilizes eight multi-stage axial-flow ducted fans for vertical takeoff and landing. During flight, it uses a large, short, stubby wing 5 at the top to provide the main lift, while two fuel engines 26 are used to improve range. This allows it to travel on the ground and also take off and land vertically from a stationary position. Its overall dimensions are approximately: length: 4690mm, width: 2000mm, height: 2130mm.

[0059] Combination Figures 1-2 This embodiment of a vertical takeoff and landing (VTOL) flying car mainly includes external components such as a jet nozzle 1, an air intake 2, a right-side door 3, a right-side window 4, a short, thick wing 5, a windshield 6, a body 7, a front steering wheel 8, a left-side door 9, a left-side window 10, a rear drive wheel 11, a rear-mounted ducted fan 12, and a vertical tail fin 13. Internally, it mainly includes a steering wheel 14, a seat 16, a multi-stage axial-flow ducted fan VTOL system 17, an airflow chamber housing 18, a microcomputer flight control system 19, a lithium battery 20, a fuel tank 21, a gear speed increaser 22, an angle gearbox 23, a clutch 24, a gear transmission 25, a fuel engine 26, a rear-wheel drive universal joint 27, a rear-wheel drive gear transfer case 28, a flexible coupling 29, a whole-aircraft ejection parachute 30, and a servo motor 31. The fuel tank 21 contains sufficient fuel to provide strong initial power to the two fuel engines 26, driving the next stage of the power transmission system.

[0060] Combination Figure 25 , Figure 26The multi-stage axial-flow ducted fan vertical take-off and landing system 17 is directly installed in the short, stubby wing 5 on the roof of the vehicle. Inside the short, stubby wing 5 is an airflow chamber shell 63, with two air inlets 2 on each side, and four air inlets plus a dustproof protective net 64. When the eight multi-stage axial-flow impeller assemblies 36 rotate at high speed, external air enters the airflow chamber shell 63 through the four air inlets 2, and is compressed layer by layer by the impellers to form eight high-pressure airflows that are ejected downwards, thus achieving the vertical take-off and landing function of the flying car.

[0061] The multi-stage axial flow ducted fan vertical lifting system 17 consists of two head multi-stage axial flow ducted fans 52, four middle multi-stage axial flow ducted fans 53, two tail multi-stage axial flow ducted fans 56, a front power distribution gearbox 54 and a rear power distribution gearbox 55, and 10 flexible couplings 29. Figure 18 The rear power distribution gearbox 55 is equipped with a rear power distribution gearbox cover 57, a small diameter bearing 35, a small bevel gear 58, a large bevel gear 59, and a rear power distribution gearbox body 60. Figure 19 The front distribution gearbox 54 includes a front distribution gearbox cover 61, a small-diameter bearing 35, small bevel gears 58, large bevel gears 59, and a front distribution gearbox body 62. The rear distribution gearbox body 60 has a large bevel gear 59 at its center, which meshes with five small bevel gears 58. The small bevel gears 58 are supported on the rear distribution gearbox body 60 by small-diameter bearings 35. A rear distribution gearbox cover 57 is provided on the rear distribution gearbox body 60. Similarly... Figure 19 The front power distribution gearbox 54 includes a front power distribution gearbox cover 61, a small-diameter bearing 35, a small bevel gear 58, a large bevel gear 59, and a front power distribution gearbox body 62. The connection of the front power distribution gearbox 54 is similar to that of the rear power distribution gearbox 55.

[0062] The small bevel gear 58 at the front of the rear power distribution gearbox 55 is connected to the small bevel gear 58 at the rear of the front power distribution gearbox 54 via a flexible coupling 29, transmitting power from the rear power distribution gearbox 55 to the front power distribution gearbox 54. The small bevel gears 58 on the left and right sides of the rear power distribution gearbox 55 are connected to the shaft of the central multi-stage axial-flow ducted fan 53 via flexible couplings 29. The small bevel gears on the left and right sides of the rear side of the rear power distribution gearbox are connected to the two rear multi-stage axial-flow ducted fans 56 via flexible couplings 29. The two small bevel gears 58 on the front side of the front power distribution gearbox 54 are connected to the two head multi-stage axial-flow ducted fans 52 via flexible couplings 29. The small bevel gears 58 on the left and right sides of the front power distribution gearbox 54 are connected to the shaft of the central multi-stage axial-flow ducted fan 53 via flexible couplings 29.

[0063] Combination Figure 3 ,Figure 4 , Figure 5 , Figure 6 The multi-stage axial flow ducted fan 53 in this embodiment mainly includes an upper housing 32, an air inlet rectifier 33, a front end fixing part 34 of the multi-stage axial flow impeller main shaft, a small diameter bearing 35, a multi-stage axial flow impeller assembly 36, a rear end fixing part 37 of the multi-stage axial flow impeller main shaft, a lower housing 38 of the multi-stage axial flow ducted fan, a self-locking micro motor 39, a small helical gear 40 driving the rotatable curved nozzle, a large helical gear 41 driving the rotatable curved nozzle, a large diameter bearing 42, a rotatable curved nozzle 43, and a dust cover 44 for the rotatable curved nozzle drive gear. The front and rear ends of the multi-stage axial flow impeller assembly 36 are supported by small-diameter bearings 35 on the front end fixing part 34 and the rear end fixing part 37 of the multi-stage axial flow impeller main shaft, respectively. The upper housing 32 of the multi-stage axial flow ducted fan is fixed between the front end fixing part 34 and the rear end fixing part 37 of the multi-stage axial flow impeller main shaft. An air inlet rectifier 33 is fixed at the front end of the upper housing 32 of the multi-stage axial flow ducted fan. A rotatable curved nozzle 43 is provided at the rear end of the rear end fixing part 37 of the multi-stage axial flow impeller main shaft.

[0064] Combination Figure 12 , Figure 13 The rotatable curved nozzle 43 in the multi-stage axial flow ducted fan is equipped with a rotatable curved nozzle drive gear dust cover 44, a large-diameter bearing 42, a rotatable curved nozzle drive large helical gear 41, a rotatable curved nozzle drive small helical gear 40, and a self-locking micro motor 39. The rotatable curved nozzle drive large helical gear 41 and the rotatable curved nozzle 43 are fixed together as a rigid body with screws and mounted on two large-diameter bearings 42. The two large-diameter bearings 42 are fixed to the rear end fixing component 37 of the multi-stage axial flow impeller main shaft. Then, the rotatable curved nozzle drive small helical gear 40 on the self-locking micro motor 39 drives the rotatable curved nozzle drive large helical gear 41, thereby enabling the rotatable curved nozzle 43 to rotate 90 degrees to the left and right. When the rotatable curved nozzle 43 rotates to 90 degrees (to the side of the nozzle), its downward vertical lift is zero, while its horizontal thrust is at its maximum. The vertical lift gradually decreases as the angle of the rotatable curved nozzle 43 increases. The multi-stage axial flow ducted fan vertical lift system 17 has the ability to generate both vertical lift and horizontal thrust, and can adjust the flight attitude of the flying car.

[0065] Combination Figure 14 , Figure 15The head-end multi-stage axial flow ducted fan 52 or the tail-end multi-stage axial flow ducted fan 56 of this embodiment has a main structure that is roughly the same as that of the middle multi-stage axial flow ducted fan 53, except that it has four additional components: an extended air delivery bend 48, an extended air delivery bend fixing component 49, a rotatable curved nozzle upper fixing component 50, and a rotatable curved nozzle lower fixing component 51. The extended air delivery bend 48 is equipped with an extended air delivery bend fixing component 49, which is fixed to the rear end fixing component 37 of the multi-stage axial flow impeller main shaft by the rotatable curved nozzle upper fixing component 50 and the rotatable curved nozzle lower fixing component 51. The rotatable curved nozzle 43 is supported on the extended air delivery bend 48 by two large-diameter bearings 42.

[0066] Combination Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 In a multi-stage axial-flow ducted fan, the blades on the moving or stationary impeller have a cross-section similar to that of a fixed aircraft wing. Viewed from the side, the wing's top is curved, while the bottom is relatively flat. The wing passes through the air, separating the airflow. Some air flows over the wing, and some flows under it. However, because the upper surface of the wing is curved, the airflow over it travels faster, resulting in a decrease in air pressure above the wing. Conversely, the air under the wing flows in a straight line, maintaining a constant speed and pressure. When the airflow fills a partial vacuum, the wing obstructs it, thus lifting the wing. The faster the aircraft flies forward, the greater the aerodynamic lift generated by the wing. When the lift exceeds gravity, the aircraft can fly. This is the well-known principle of lift generation in fixed-wing aircraft, known as Bernoulli's principle. The multi-stage axial flow impeller assembly 36 includes a main shaft 47, moving impellers 45, and stationary impellers 46. The main structure of both the moving impellers 45 and stationary impellers 46 consists of several wing-like blades surrounding a central point. The multi-stage axial flow ducted fan consists of a row of moving impellers 46 followed by a row of stationary impellers 46, forming a stage, which is its most basic working unit. Multi-stage compression is composed of multiple stages connected end-to-end. When the multi-stage axial flow impeller assembly 36 rotates at high speed, it draws in external air through the inlet 2. The internal moving impellers 45 perform work on the gas, increasing its pressure and kinetic energy, and compressing the air stage by stage, ejecting a high-pressure airflow from the rotatable curved nozzle 43. The moving impellers 45 are fixed to the impeller main shaft 47, and the stationary impellers 46 are fixed within the housing composed of the upper casing 32 and the lower casing 38 of the multi-stage axial flow ducted fan.

[0067] Combination Figure 20 , Figure 21 , Figure 22 , Figure 23 , Figure 24The multi-stage axial-flow ducted fan vertical take-off and landing system 17 controls eight rotatable curved nozzles 43 to perform flight attitudes such as pitching forward or backward, tilting left or right, moving forward or backward, taking off or landing, and rotating clockwise or counterclockwise.

[0068] When the forward-tilt flight mode is activated, nozzles E, F, G, and H maintain a downward thrust, maximizing vertical thrust. Then, nozzles A and B are simultaneously rotated slowly backward, while nozzles C and D are simultaneously rotated slowly forward. This gradually decreases the vertical thrust of nozzles A, B, C, and D while increasing the horizontal thrust. At this point, the horizontal thrust of nozzles A and C, and nozzles B and D, will cancel each other out. Therefore, the sum of the overall vertical thrust of nozzles A, B, C, and D will be less than the sum of the overall vertical thrust of nozzles E, F, G, and H. Reversing this operation activates the backward-tilt flight mode.

[0069] When the left-tilt flight mode is activated, nozzles A, C, E, and G consistently thrust downwards, maximizing vertical thrust. Then, nozzles B and F on the left side are simultaneously rotated slowly backwards, while nozzles D and H are simultaneously rotated slowly forwards. This gradually decreases the vertical thrust of nozzles B, D, F, and H on the left side, while gradually increasing the horizontal thrust. At this point, the horizontal thrust of nozzles B and D, and nozzles F and H, will cancel each other out. Therefore, the sum of the overall vertical thrust of nozzles B, D, F, and H on the left side will be less than the sum of the overall vertical thrust of nozzles A, C, E, and G. Reversing this operation activates the right-tilt flight mode.

[0070] When forward flight mode is activated, nozzles C, D, E, and F consistently thrust downwards, maximizing vertical thrust. Then, nozzles A and B in front and nozzles G and H in the rear simultaneously and slowly rotate backwards. This gradually reduces the vertical thrust of nozzles A and B and G and H, while gradually increasing the horizontal thrust, propelling the flying car forward. Reversing this operation activates backward flight mode.

[0071] When takeoff mode is activated, nozzles A, B, C, D, E, F, G, and H simultaneously spray downwards, maximizing overall vertical thrust and eliminating horizontal thrust. The flying car takes off when its overall vertical thrust exceeds its own weight. When landing mode is activated, nozzles A, B, E, and F slowly rotate backwards, while nozzles C, D, G, and H slowly rotate forwards. This gradually decreases the vertical thrust of nozzles A, B, C, D, E, F, G, and H while gradually increasing the horizontal thrust. At this point, the horizontal thrust of nozzles A and C, nozzles B and D, nozzles E and G, and nozzles F and H will cancel each other out. The overall vertical thrust of nozzles A, B, C, D, E, F, G, and H will then be less than the weight of the flying car, causing it to slowly land on the ground.

[0072] When clockwise flight mode is activated, nozzles C, D, E, and F consistently thrust downwards, maximizing vertical thrust. Then, nozzles A and G on the right slowly rotate backwards simultaneously, while nozzles B and H on the left slowly rotate forwards simultaneously. The flying car will then rotate clockwise around a central point. Reversing this operation activates counter-clockwise flight mode.

[0073] Combination Figure 27 , Figure 28 In this embodiment, the vertical takeoff and landing (VTOL) flying car's rear vertical tail rudder 13 uses a servo motor 31 to control the flying car's left or right flight. When the rear-end propulsion ducted fan 12 operates, the resulting rearward airflow is deflected to the left or right by the left and right swing of the vertical tail rudder 13, thus changing the direction of the airflow and controlling the flying car's left or right turn in the air. The lithium battery 20 powers the servo motor 31, driving the servo arm 69. Each end of the servo arm 69 is hinged with a servo lever 68, which is hinged to one end of the vertical tail 65 rudder frame. The servo motor 31 pulls the servo lever 68 through the servo arm 69, causing the vertical tail 65 rudder frame to deflect left or right. Its main internal structure includes a short, thick wing frame 66, servo levers 68, servo arms 69, servo motor 31, vertical tail 65 rudder frame, and car body frame 67.

[0074] Combination Figure 33 , Figure 34 , Figure 35This embodiment of a vertical takeoff and landing (VTOL) flying car's front-wheel steering system mainly comprises a front steering wheel 8, a front-wheel steering main frame 78, a steering wheel 14, a front-wheel steering tie rod 79, a front-wheel steering suspension spring 80, and a front-wheel steering suspension beam 81. The rear-wheel drive system mainly comprises a gearbox 25, a rear-wheel drive main frame 75, rear drive wheels 11, a rear-wheel drive universal joint 27, a rear-wheel drive gear transfer case 28, a rear-wheel drive suspension spring 76, and a rear-wheel drive suspension beam 77. The rear-wheel drive gear transfer case 28 further comprises a right sub-housing 70, a clutch 24, a right main housing 71, a small bevel gear 58, an upper sub-housing 72, a small-diameter bearing 35, a clutch 24, a small bevel gear 58, a large bevel gear 59, a left main housing 73, a clutch 24, and a left sub-housing 74. The large bevel gear 59 and the three small bevel gears 58 meshing with it are all rotatably supported by bearings within the housing composed of the right main housing 71 and the upper auxiliary housing 72 of the rear-wheel drive transfer case. The right auxiliary housing 70 of the rear-wheel drive transfer case is fixed to the right side of the right main housing 71, and the left auxiliary housing 74 of the rear-wheel drive transfer case is fixed to the left side. The upper auxiliary housing 72 of the rear-wheel drive transfer case is located at the top. The left auxiliary housing 74, the right auxiliary housing 70, and the upper auxiliary housing 72 of the rear-wheel drive transfer case are all equipped with clutches 24, which are respectively connected to the rear-wheel drive universal joints 27 on the left and right sides and the flexible coupling 29 at the top.

[0075] Figure 29This embodiment describes a power transmission system for a vertical takeoff and landing (VTOL) flying car, capable of operating in three modes: flight, VTOL, and ground driving. It includes a multi-stage axial-flow ducted fan vertical takeoff and landing system 17, a flexible coupling 29, a speed-increasing gearbox 22, a clutch 24, an angle gearbox 23, a gear transmission 25, a fuel engine 26, a rear-wheel drive universal joint 27, a rear drive wheel 11, a rear-wheel drive gear transfer case 28, and a tail-mounted ducted fan 12. The four clutches 24, plus the three clutches 24 in the rear-wheel drive gear transfer case 28, totaling seven clutches 24, are used to freely switch between the three power transmission modes: flight, VTOL, and ground driving. The upper fuel engine 26 is connected to the upper angle gearbox 23 via clutch 24. The upper angle gearbox 23 is connected to the speed-increasing gearbox 22 via clutch 24. The speed-increasing gearbox 22 is connected to the rear power distribution gearbox of the multi-stage axial flow ducted fan vertical lifting system 17 via flexible coupling 29. The lower fuel engine 26 is connected to the lower angle gearbox 23 via clutch 24. The lower angle gearbox 23 is connected to the upper angle gearbox 23 via a flexible coupling 29 and is connected to the gearbox 25 via clutch 24. The gearbox 25 is connected to the rear wheel drive gear transfer case 28 via a flexible coupling 29. The left and right sides of the rear wheel drive gear transfer case 28 are connected to the left and right rear drive wheels 11 via rear wheel drive universal joints 27. The top is connected to the rear propulsion ducted fan 12 via flexible coupling 29 and angle gearbox 23.

[0076] Figure 30 In the flying car, when it is flying, the power of one or two fuel engines 26 is transmitted through clutch 24, angle gearbox 23, flexible coupling 29, clutch 24, and then into gearbox 25 to change the speed. The power is then transmitted by flexible coupling 29 to rear wheel drive gear transfer case 28, and then through the upper flexible coupling 29 and angle gearbox 23, finally to the rear propulsion ducted fan 12 to propel the entire flying car forward.

[0077] Figure 31In the vertical takeoff and landing of the flying car, the power from one or two fuel engines 26 is transmitted through clutch 24, angle gearbox 23, flexible coupling 29, clutch 24, and then into speed-increasing gearbox 22. After passing through the upper flexible coupling 29, the power is finally transmitted to the multi-stage axial-flow ducted fan vertical takeoff and landing system 17. The speed-increasing gearbox 22 doubles the rotational speed of the fuel engines 26, driving the multi-stage axial-flow impeller assembly 36 to tens of thousands of revolutions per minute, thereby generating high-speed, high-pressure airflow to provide strong lift or thrust.

[0078] Figure 32 In the flying car, when it is driving on the ground, the power of one or two fuel engines 26 is transmitted through clutch 24, angle gearbox 23, flexible coupling 29, clutch 24, and then into gearbox 25 to change the speed. The power is then transmitted by flexible coupling 29 to rear wheel drive gear transfer case 28, and then through rear wheel drive universal joints 27 on the left and right sides, and finally to the rear drive wheels 11.

[0079] Figure 36 In this design, when the flying car is traveling on the ground, the angle between its short, stubby wings (5) and the ground is -3 degrees, providing excellent grip and enhancing ground stability. Otherwise, when the flying car reaches a certain speed, the short, stubby wings (5) will generate lift, resulting in a loss of driving stability.

[0080] During vertical takeoff and landing, the flying car uses eight multi-stage axial-flow ducted fans on its top to perform vertical takeoff and landing in place. First, the front of the car is tilted slightly upwards, and the short, thick wings are parallel to the ground, entering helicopter takeoff and landing mode.

[0081] While in flight, the microcomputer flight control system 19 operates the multi-stage axial-flow ducted fan vertical lift system 17 to maintain a slightly upward-tilted flight attitude, with the main lift provided by the short, thick wings 5. The tail-mounted ducted fan 12 at the rear of the flying car provides forward thrust, while the vertical tail rudder 13 controls left and right directions to achieve aerial turns.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vertical takeoff and landing flying car, comprising a body, a power system, and wheels; characterized in that, The vehicle has wings on the top and a vertical tail fin at the rear; the wings provide aerodynamic lift for the flying car, and the vertical tail fin changes the direction of airflow. The wing is equipped with a multi-stage axial-flow ducted fan vertical take-off and landing system, including a nose multi-stage axial-flow ducted fan, a middle multi-stage axial-flow ducted fan, and a tail multi-stage axial-flow ducted fan; the nozzle directions of the nose, middle, and tail multi-stage axial-flow ducted fans are adjustable to enable the flying car to take off and land vertically and adjust its flight attitude. The power system provides power for the flying car's movement, the multi-stage axial-flow ducted fan at the head, the multi-stage axial-flow ducted fan in the middle and the multi-stage axial-flow ducted fan at the tail, and the vertical tail fin. The multi-stage axial flow ducted fan vertical lifting system is provided with a front distribution power gearbox and a rear distribution power gearbox; the rear distribution power gearbox is connected to the front distribution power gearbox through a coupling and is used to transmit power to the front distribution power gearbox; the rear distribution power gearbox is connected to the middle multi-stage axial flow ducted fan and the tail multi-stage axial flow ducted fan through a coupling, and the front distribution power gearbox is connected to the middle multi-stage axial flow ducted fan and the head multi-stage axial flow ducted fan through a coupling; The front and rear power distribution gearboxes are identical, each equipped with a larger bevel gear and multiple smaller bevel gears located on the gearbox body, with the larger bevel gear meshing with the multiple smaller bevel gears; a pair of smaller bevel gears facing each other in the front and rear power distribution gearboxes are connected by a coupling, and the remaining smaller bevel gears are connected by a coupling to the main shaft of the corresponding head multi-stage axial flow ducted fan, middle multi-stage axial flow ducted fan, or tail multi-stage axial flow ducted fan.

2. The vertical takeoff and landing flying car according to claim 1, characterized in that, The central multi-stage axial flow ducted fan includes: case, Rotary support within the housing, The servo motor multi-stage impeller, mounted on the housing and main shaft, is used to compress air in stages. The rotatable curved nozzle located at the rear of the housing can rotate under the drive of the gear drive assembly.

3. The vertical takeoff and landing flying car according to claim 2, characterized in that, The head-end multi-stage axial flow ducted fan and the tail-end multi-stage axial flow ducted fan are based on the middle multi-stage axial flow ducted fan, with an added extended air delivery bend to extend the installation position of the rotatable bend nozzle.

4. The vertical takeoff and landing flying car according to claim 1, characterized in that, The power system includes an engine, an angle gearbox, a speed-increasing gearbox, and a gear transmission. The engine is connected to an angle gearbox via a clutch, the angle gearbox is connected to a speed-increasing gearbox, the speed-increasing gearbox is connected to a multi-stage axial-flow ducted fan vertical lifting system via a flexible coupling, the angle gearbox is also connected to another angle gearbox via a coupling, the other angle gearbox is connected to a gearbox via a clutch, and the gearbox is connected to a rear-wheel drive gear transfer case via a coupling.

5. The vertical takeoff and landing flying car according to claim 4, characterized in that, There are two engines, and the angle gearboxes connected to the two engines are connected by a coupling.

6. The vertical takeoff and landing flying car according to claim 4, characterized in that, The left and right sides of the rear-wheel drive gear transfer case are connected to the left and right rear drive wheels via rear-wheel drive universal joints.

7. The vertical takeoff and landing flying car according to claim 6, characterized in that, The top of the rear-wheel drive gear transfer case is connected to the tail propulsion duct fan via a flexible coupling and an angle gearbox.

8. The vertical takeoff and landing flying car according to claim 4, characterized in that, When the aircraft is on the ground, the angle between the wing and the ground is -3 degrees.

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