Built-in lifting hovercar based on tandem double-rotor configuration

Abstract

A roof opening and closing mechanism is arranged at an opening in the top of an upper car body, lifting driving devices are arranged in elevator mounting spaces on the two sides of a lower car body, the bottoms of the lifting driving devices are fixedly connected with the upper surface of a lower mounting plate, and the tops of the lifting driving devices are connected with the lower surface of the upper mounting plate; the longitudinal dual-rotor flight module is integrally mounted on the upper mounting plate and comprises a power source, a transmission system, a front rotor assembly and a rear rotor assembly, the front rotor assembly and the rear rotor assembly are distributed front and back along the longitudinal axis of the vehicle body, and the longitudinal dual-rotor flight module is driven by a lifting driving device to ascend and descend along with the upper mounting plate; the problems that although an existing flying car of a multi-rotor or tilt-rotor structure can provide enough lift force, a large transverse span or a complex externally-hung folding mechanism is needed, the width of the car exceeds the standard, attractiveness is affected, and road driving safety exists are solved.

Description

Technical Field

[0001] This invention relates to the field of amphibious vehicle technology, and specifically to a built-in lift-and-fly vehicle based on a tandem dual-rotor configuration. Background Technology

[0002] With the rise of the concept of three-dimensional transportation, flying cars have become a research hotspot. Current flying car configurations mainly focus on multi-rotor or tiltrotor configurations. However, these mainstream configurations face inherent contradictions in their physical characteristics during the "car-ification" process: to provide sufficient lift, multi-rotor structures usually require a large lateral span, resulting in excessive vehicle width; or they require complex folding mechanisms to fold the arms to the outside of the vehicle body, affecting the vehicle's aesthetics and road driving safety.

[0003] In contrast, flying cars employing a tandem rotor layout have significant advantages: their front and rear rotors counteract torque, eliminating the need for a tail rotor, and both rotors generate lift, resulting in high aerodynamic efficiency and a load capacity far superior to conventional multi-rotors of the same class. More importantly, the slender layout of the tandem rotors naturally matches the rectangular body shape of a car in terms of geometry.

[0004] However, although tandem rotors are theoretically well-suited for flying cars, there are currently few mature engineering applications. The main technical challenges include: difficulty in storage—the large span between the front and rear rotors makes it difficult to fully incorporate traditional folding methods into the vehicle body; space conflicts—the concealed lifting mechanism often occupies the center of the vehicle body, affecting passenger seating arrangement; and a lack of dedicated configurations—existing research mostly involves forcibly adding wheels to an aircraft, rather than designing an integrated land-air vehicle architecture specifically for the characteristics of tandem rotors.

[0005] Therefore, this invention aims to propose a novel flying car configuration that fully explores and utilizes the load-bearing and layout advantages of tandem rotors, and solves the challenges of storage and application on a car platform through innovative mechanical structure design. Summary of the Invention

[0006] In view of this, in order to solve the problems of existing multi-rotor or tiltrotor flying cars that, while providing sufficient lift, require a large lateral span or complex external folding mechanisms, resulting in excessive vehicle width, affecting aesthetics, and posing road safety issues, this invention provides a concealed lift-and-drop flying car based on a tandem dual-rotor configuration. It fully utilizes the geometric characteristics of the tandem dual-rotor aerodynamic layout that naturally fits the car body in the longitudinal dimension. Through a unique concealed mechanical architecture, it achieves complete storage and vertical take-off and landing of a large-size dual-rotor system without sacrificing interior passenger space.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An internally mounted, liftable flying car based on a tandem dual-rotor configuration includes:

[0009] The vehicle body assembly includes a lower vehicle body and an upper vehicle body covering the lower vehicle body. The lower vehicle body defines a passenger compartment and vehicle body assembly installation spaces located on both sides of the passenger compartment. The upper vehicle body and the lower vehicle body together enclose a flight module receiving cavity for storing flight components.

[0010] The roof opening and closing mechanism is located at the top opening of the upper body and includes a multi-link roof cover and a drive assembly. It has a closed position that can close the flight module housing cavity and an open position that exposes the lifting channel.

[0011] The lifting drive device is installed in the vehicle body component installation space, including X-shaped scissor lift modules symmetrically arranged on the left and right sides of the passenger compartment. The bottom of the X-shaped scissor lift module is fixedly connected to the lower mounting plate on the lower vehicle body, and the top is connected to the upper mounting plate.

[0012] The tandem dual-rotor flight module is integrated and installed on the upper mounting plate, including a power source, a transmission system, and front and rear rotor assemblies distributed along the longitudinal axis of the vehicle body.

[0013] The state switching logic is as follows: when the flying car is in a ground driving state, the front rotor assembly and the rear rotor assembly fold inward, the lifting drive device is in a retracted state and drives the flight module to descend into the flight module housing cavity, and the roof opening and closing mechanism is in a closed position; when the flying car is in a flight state, the roof opening and closing mechanism is in an open position, the lifting drive device is in an extended state and lifts the flight module above the vehicle body, the front rotor assembly and the rear rotor assembly unfold and provide lift.

[0014] Furthermore, the lifting drive device includes:

[0015] Servo drive motors: Each X-type scissor lift module is equipped with an independent servo drive motor.

[0016] The lead screw drive assembly includes a lead screw arranged in a horizontal direction and a lead screw nut fitted on the lead screw. The lead screw nut is installed on the active slider assembly. A servo drive motor drives the lead screw to rotate, which in turn drives the lead screw nut to move axially along the lead screw, thereby driving the active slider assembly to move axially.

[0017] The scissor linkage mechanism includes a first link and a second link that are hinged to each other. The active slider assembly is hinged to the movable end of the scissor linkage mechanism. The horizontal displacement of the active slider assembly changes the cross angle between the first link and the second link, thereby driving the upper mounting plate to rise and fall in the vertical direction.

[0018] The central aisle is flanked by X-shaped scissor lift modules on both sides, which are spatially independent and parallel to each other, forming a central aisle for passengers. The seats in the passenger cabin are located within this central aisle.

[0019] Furthermore, a safety limiting structure is also provided in the lower body. The safety limiting structure includes several rigid limiting stops set in the lower body cavity. When the lifting drive device is in the fully retracted state, the bottom surface of the upper mounting plate abuts against the top surface of the rigid limiting stops. The height of the rigid limiting stops is configured such that when the upper mounting plate abuts against it, a preset safe head space is maintained between the upper mounting plate and the top of the seat in the passenger compartment to prevent the mechanical structure from intruding into the passenger seating area.

[0020] Furthermore, the tandem dual-rotor flight module adopts a differentiated folding structure, specifically including:

[0021] The front rotor assembly has its hub axis arranged parallel to the longitudinal centerline of the vehicle body and adopts a double-hinge multi-stage folding mechanism. The front rotor assembly includes a first blade and a second blade, wherein the position of the first blade is relatively fixed, and the second blade is folded sequentially through two 90° hinges connected in series, achieving a 180° flip and stacking on the side of the first blade. The rear rotor assembly has its hub axis arranged perpendicular to the longitudinal centerline of the vehicle body and adopts a single-hinge inward folding mechanism. The two blades of the rear rotor assembly are folded horizontally inward by 90° around the hinge at their respective roots. In a staggered storage relationship, the vertical mounting plane of the rear rotor assembly is higher than that of the front rotor assembly, so that in the stored state, the folded rear rotor assembly is located above the folded front rotor assembly, forming a highly staggered stacking structure that does not interfere with each other.

[0022] Furthermore, the roof opening and closing mechanism includes a linear guide rail set on the top of the upper body, a multi-link roof cover plate slidably mounted on the linear guide rail, and a drive assembly. The drive assembly includes a stepper motor, a synchronous pulley, and a synchronous belt. The stepper motor drives the roof cover plate to slide and fold along the guide rail via the synchronous belt to open or close the top opening of the flight module receiving cavity.

[0023] Furthermore, the power arrangement structure of the flight module is as follows: the power source includes an engine and a fuel tank, which are installed inside the tandem dual-rotor flight module and rise and fall synchronously with the lifting drive device; the output end of the engine is connected to a main pulley, which drives the pulley and drive shaft to rotate via a belt, and the drive shaft is connected to the rotor gearbox of the front rotor assembly and the rear rotor assembly; the rotor gearbox is equipped with a bevel gear set, which is used to convert the horizontal rotational power into the vertical rotational power, and drive the front rotor hub and the rear rotor hub to rotate at the same speed but in opposite directions, thereby driving the front and rear rotors to rotate.

[0024] Furthermore, there are four rigid limit stops, which are arranged in the four corner areas of the mounting plate to provide stable four-point support when stored.

[0025] Furthermore, the mounting plane of the rear rotor assembly is higher than that of the front rotor assembly in the vertical direction, so that in the stored state, the folded rear rotor assembly is located above the folded front rotor assembly, forming a highly staggered stacked structure that does not interfere with each other.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The internally mounted, liftable flying car based on a tandem dual-rotor configuration disclosed in this invention fully utilizes the geometric advantage of the tandem dual-rotor layout's natural fit with the elongated body of a car in the longitudinal dimension. Through an innovative "dual-side scissor lift + central aisle" lifting layout, the lifting drive devices are symmetrically arranged on both sides of the passenger cabin, naturally forming a spacious central aisle for seating. This achieves internal storage of the flight module while maximizing passenger cabin space and avoiding mechanical intrusion on occupants. This allows the flying car to maintain a streamlined appearance in land mode, meeting road driving and parking requirements; and in flight mode, it can utilize the high payload and high aerodynamic efficiency of the tandem dual rotors to achieve vertical takeoff and landing.

[0028] 2. The concealed lift-and-flying car based on a tandem dual-rotor configuration disclosed in this invention successfully solves the storage problem of large-span tandem dual-rotor systems through a storage solution of "differentiated folding + staggered stacking". Specifically, the front rotor assembly adopts a multi-stage folding with double hinges parallel to the vehicle body, while the rear rotor assembly adopts an inward folding with a single hinge perpendicular to the vehicle body. Furthermore, the mounting plane of the rear rotor is higher than that of the front rotor, forming a staggered stacking, thereby completely storing the massive rotor system within the limited vehicle body contour. In addition, by setting a rigid limiting stop on the lower body, the weight of the flight module is directly transferred to the vehicle chassis in land mode, thus unloading the lifting transmission mechanism and extending its mechanical life. At the same time, the height of the limiting stop ensures that a safe headroom is maintained between the upper mounting plate and the top of the passenger cabin seats, ensuring occupant safety even in the event of mechanical failure, constituting a physical failure protection mechanism.

[0029] 3. The internally mounted, liftable flying car based on a tandem dual-rotor configuration disclosed in this invention adopts a "power source-driven lift" arrangement, directly integrating the engine and fuel tank inside the flight module, which rises and falls with it. This eliminates the need for a complex telescopic drive shaft, simplifying the power transmission path. Power is transmitted to the bevel gearboxes of the front and rear rotors via belts and drive shafts, driving the rotors to rotate at the same speed but in opposite directions, naturally canceling out counter-torque. No tail rotor is needed, improving aerodynamic efficiency. This highly integrated design, combined with a reliable roof opening and closing mechanism and lift drive device, achieves a smooth and safe seamless transition between land and flight modes, greatly enhancing the overall practicality and reliability of the flying car.

[0030] 4. This invention discloses a concealed, liftable flying car based on a tandem dual-rotor configuration. It aims to explore and realize the application of tandem dual-rotor technology in the field of heavy-duty flying cars. Leveraging the high aerodynamic efficiency, strong load-bearing capacity, and natural longitudinal layout that fits the narrow body of a car, a novel amphibious vehicle architecture is proposed. The flying car includes a lower body, an upper body, a roof opening and closing mechanism, a lifting drive device, and a tandem dual-rotor flight module. The flight module is installed inside the vehicle body via lifting mechanisms symmetrically arranged on both sides of the passenger compartment. In land mode, the large front and rear rotors are cleverly housed within the limited vehicle body contour using differentiated folding logic, and the roof is closed, maintaining the vehicle's streamlined appearance and road passability. In flight mode, the roof opens, and the flight module rises and deploys as a whole. This invention not only realizes the application of the tandem dual-rotor configuration on a passenger car platform but also, through rigid limiting and hollow layout design, balances passenger space and mechanical safety, making it adaptable to takeoff and landing on various road sections and possessing extremely high applicability.

[0031] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a schematic diagram of the overall structure of the flying car in land driving mode provided in an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 The schematic diagram shows the overall structure in land driving mode after the vehicle body and windows are hidden and the transparency of the upper mounting plate is adjusted. The rotors are folded, the roof is closed, and the lift is retracted.

[0035] Figure 3 This is a schematic diagram of the overall structure of the flying car in flight mode according to an embodiment of the present invention;

[0036] Figure 4 yes Figure 3 The schematic diagram shows the overall structure in flight mode after the vehicle body and windows are hidden and the transparency of the upper mounting plate is adjusted, with the rotors deployed, the roof opened, and the roof extended.

[0037] Figure 5 This is a schematic diagram of the upper body structure provided in an embodiment of the present invention, showing the safety limiting structure and the linear guide rail used in the roof opening and closing mechanism that are in contact with the upper surface of the upper mounting plate when the lifting drive device is deployed;

[0038] Figure 6 This is a schematic diagram of the lower body structure provided in an embodiment of the present invention, showing the arrangement of the four rigid limit stops that contact the lower surface of the upper mounting plate when the lifting drive device is stored.

[0039] Figure 7 This is a right view of the flying car provided in this embodiment of the invention after adjusting the transparency of the vehicle body during the ascent and descent phase, showing the spatial relationship between the scissor lift mechanism and the central passenger passage.

[0040] Figure 8 This is a schematic diagram of the structure of the X-type scissor lift module provided in an embodiment of the present invention, showing the cooperative relationship between the lead screw drive, the slider and the scissor lift linkage;

[0041] Figure 9 This is a partially enlarged structural fracture diagram of the roof opening and closing mechanism provided in an embodiment of the present invention after adjusting the transparency of the upper body, showing the multi-link folding cover, guide rail and belt drive assembly;

[0042] Figure 10 This is a schematic diagram of a tandem dual-rotor flight module provided in an embodiment of the present invention, showing the front rotor assembly folded 180° by two horizontal hinges, the rear rotor assembly folded 90° by a single vertical hinge, the staggered stacking relationship between the front and rear rotors, and the power arrangement structure of the flight module.

[0043] Figure 11 yes Figure 10 A schematic diagram of a tandem dual-rotor flight module from another perspective.

[0044] Reference numerals: 1-Upper body; 11-Upper body safety limit structure; 12-Linear guide rail; 2-Lower body; 21-Lower body rigid limit stop; 3-Window; 4-Roof opening and closing mechanism; 41-Stepper motor; 42-Main synchronous pulley; 43-Slave synchronous pulley; 44-Synchronous belt; 45-Synchronous belt slider; 46-Roof cover; 5-Tandem dual-rotor flight module; 51-Front rotor assembly; 52-Rear rotor assembly; 511-Front rotor first hinge; 512-Front rotor second hinge; 513-Front rotor first blade; 514-Front rotor second blade; 515-Front rotor hub; 521-Rear rotor hinge; 522-Rear rotor first blade; 5 23-Second blade of rear rotor; 524-Rear rotor hub; 531-Engine; 532-Engine main pulley; 533-Engine driven pulley; 534-Belt; 535-Drive shaft; 536-Front rotor main bevel gear; 537-Front rotor driven bevel gear; 538-Rear rotor main bevel gear; 539-Rear rotor driven bevel gear; 6-Lifting drive device; 61-Servo drive motor; 62-Lead screw; 63-Lead screw nut; 64-Active slider assembly; 65-First connecting rod; 66-Second connecting rod; 67-Passive slider assembly; 68-Lower mounting plate hinged fixing base; 69-Upper mounting plate hinged fixing base; 7-Upper mounting plate; 8-Lower mounting plate. Detailed Implementation

[0045] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0046] Flying cars in related technologies struggle to perfectly balance the maneuverability required for land travel with the high payload demands of flight. For example, current mainstream multi-rotor flying cars, such as quadcopters or octocopters, typically require a large horizontal deployment area to provide sufficient lift, resulting in excessively wide bodies that cannot navigate narrow urban roads. Alternatively, they employ complex external attachment mechanisms to fold the arms to the outside of the vehicle, which not only disrupts the vehicle's streamlined appearance and increases wind resistance and noise but also makes the overall size excessive, hindering parking in standard spaces. Furthermore, traditional lifting and retraction solutions often require a large central pillar or hydraulic system occupying the central area of ​​the vehicle, severely compressing passenger space and resulting in a cramped cabin layout.

[0047] To address or partially address the problems existing in the aforementioned related technologies, this application provides a concealed lift-and-drop flying car based on a tandem dual-rotor configuration. This flying car innovatively introduces a tandem dual-rotor layout, utilizing its large longitudinal dimensions, small lateral dimensions, and strong load-bearing capacity to perfectly fit the elongated body contours of a car. Through a unique "dual-side scissor lift + central tunnel" lifting architecture and a "differentiated folding + staggered stacking" storage logic, the massive dual-rotor system is completely "invisibly" stored inside the vehicle body without sacrificing interior passenger space and load-bearing capacity. This allows for seamless switching between three modes: compliant road driving, vertical takeoff and landing, and efficient cruising.

[0048] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0049] See Figures 1 to 11 This application provides a concealed, liftable flying car based on a tandem dual-rotor configuration, which can freely switch between land and flight modes. Its core design concept lies in actively selecting and utilizing the inherent aerodynamic and geometric advantages of the tandem dual-rotor layout for amphibious vehicles, combined with innovative X-shaped scissor lifts and differentiated folding technology for the front and rear rotors, thus overcoming the technical bottlenecks of traditional flying cars in terms of storage size, passenger space, and safety.

[0050] See Figure 1 and Figure 2 The main structure of the flying car includes a body assembly, which comprises an upper body 1 and a lower body 2. The lower body 2 serves as the chassis load-bearing unit, and its interior is structurally optimized to define a central passenger cabin and symmetrically distributed elevator installation spaces on either side of the passenger cabin. The upper body 1 covers the lower body 2, and the two are connected by welding or bolts to form an integrated body frame, collectively enclosing a flight module housing for flight components. Windows 3 are located on the corresponding side walls of the lower body 2 to provide good driver visibility.

[0051] A roof opening and closing mechanism 4 is provided at the top opening of the upper body 1. A lifting drive device 6 is provided in the lifting space on both sides of the lower body 2. The bottom of the lifting drive device 6 is fixedly connected to the upper surface of the lower mounting plate 8, and the top is connected to the lower surface of the upper mounting plate 7. The tandem dual-rotor flight module 5 is integrated and installed on the upper mounting plate 7, including a power source, a transmission system, and front rotor assembly 51 and rear rotor assembly 52 distributed along the longitudinal axis of the vehicle body. The tandem dual-rotor flight module 5 moves up and down with the upper mounting plate 7 under the drive of the lifting drive device 6.

[0052] In this embodiment, "land driving mode" should be understood as: the flying car only uses the ground driving system to travel on roads or remains stationary. Please refer to [link / reference]. Figure 1 and Figure 2 In this state, the tandem dual-rotor flight module 5 has completed its folding action; the lifting drive device 6 is in a retracted state, pulling the upper mounting plate 7 downwards, thereby completely storing the flight module 5 integrated on the upper mounting plate 7 into the internal cavity of the vehicle body. Subsequently, the roof opening and closing mechanism 4 is in the closed position, sealing the opening of the cavity. At this time, there are no protruding wings or rotor structures on the exterior of the vehicle, presenting an integrated streamlined automotive appearance with excellent road passability and aerodynamic performance.

[0053] Flight mode should be understood as: the state in which the flying car uses its rotor system to leave the ground and perform aerial operations. Please refer to [link / reference]. Figure 3 and Figure 4 In this state, the roof opening / closing mechanism 4 first switches to the open position, revealing the lifting channel; then, the lifting drive device 6 switches from the retracted state to the extended state, driving the upper mounting plate 7 to rise vertically relative to the lower mounting plate 8, smoothly lifting the tandem dual-rotor flight module 5 to the predetermined working height outside the vehicle body. At this time, the front rotor assembly 51 and the rear rotor assembly 52 unfold to their working configuration and rotate at high speed, utilizing the efficient aerodynamic characteristics of the tandem dual-rotor layout to achieve vertical take-off and landing of the flying car.

[0054] Specifically, to address the issue of concealed storage mechanisms often encroaching on valuable interior space, this application embodiment features an innovative design for the layout of the lifting drive device 6. Please refer to... Figure 7 and Figure 8 The lifting drive unit 6 includes two sets of X-shaped scissor lift modules symmetrically arranged on the left and right sides of the passenger compartment. These two sets of X-shaped scissor lift modules are spatially independent and parallel, naturally forming a spacious central passageway running through the front and rear of the vehicle body. This central passageway constitutes the core area of ​​the passenger compartment, where the driver's seat, passenger seats, and control panel are all located. This "side-mounted scissor lift + hollow layout" cleverly utilizes the side-mounted characteristic of the X-shaped scissor lift modules to achieve physical isolation between the massive lifting drive unit 6 and the passenger seating space, ensuring no interference between them.

[0055] In land-based mode, if the weight of the flight module is borne entirely by the lead screw or scissor linkage mechanism for an extended period, continuous road vibrations can cause wear and even plastic deformation of the lead screw, posing a significant safety hazard. Therefore, this application designs a multi-layered physical restraint structure to achieve mechanical stress relief and passive safety.

[0056] Please see Figure 6 The inner bottom plate of the lower body 2 is provided with rigid limiting stops 21, preferably four, which are respectively arranged corresponding to the four corner areas of the upper mounting plate 7. These stops are made of high-strength alloy material, and their tops can be provided with rubber buffer pads to absorb impact.

[0057] When the lifting drive device 6 is fully retracted to the land-going mode, the lower surface of the upper mounting plate 7 directly abuts against and is securely seated on the top surface of the four lower body rigid limit stops 21. This design achieves the crucial "load transfer." When traveling on the ground, the enormous weight of the flight module and the upper mounting plate 7 is directly transferred to the rigid structure of the chassis, while the lead screw 62 and scissor linkage are in a stress-relieving state, thereby greatly extending the mechanical life of the transmission mechanism.

[0058] More importantly, the height of the lower body rigid limit stop 21 has been precisely calculated and configured. (See also...) Figure 7 When the upper mounting plate 7 is seated on the stop, a pre-defined safe headroom is forcibly maintained between the bottom surface of the upper mounting plate 7 and the top of the seats in the passenger compartment. This constitutes a fail-safe mechanism, ensuring that even in the event of extreme mechanical failures such as screw breakage or motor failure, the physical stop can guarantee that the heavy-duty module on top will never intrude into the passenger compartment, thereby protecting the safety of personnel.

[0059] In addition, see Figure 5 The inner wall of the upper body 1 is also provided with an upper body safety limit structure 11. On the one hand, when the flight module is raised, the upper body safety limit structure 11 acts as an upper stop point to limit the flight module from rising excessively; on the other hand, the inner wall of the upper body 1 provides lateral support and guidance for the raised scissor mechanism, effectively suppressing the lateral sway caused by airflow disturbance during flight.

[0060] See Figure 7 The travel limit of the lifting drive device 6 is further explained. With the roof opening and closing mechanism 4 fully open and the front rotor assembly 51 and the rear rotor assembly 52 folded, the lifting drive device 6 is defined as rising to the highest working position when the upper surface of the upper mounting plate 7 abuts against the upper vehicle body safety limit structure 11, and the lifting drive device 6 is defined as falling to the lowest storage position when the lower surface of the upper mounting plate 7 abuts against the lower vehicle body rigid limit stop 21.

[0061] See Figure 8 This paper details the specific structure of a single X-type scissor lift module. This module is connected between the upper mounting plate 7 and the lower mounting plate 8. Its drive system is precise and reliable, specifically including: a servo drive motor 61, a lead screw 62, a lead screw nut 63, and a scissor lift linkage mechanism. The scissor lift linkage mechanism, as the actuating component for vertical lifting, includes a first link 65 and a second link 66 that are hinged to each other at their central intersection point via a pivot.

[0062] The servo drive motor 61 includes a high-power servo drive motor and a precision reducer, and is fixedly mounted on one side of the upper surface of the lower mounting plate 8. The lead screw 62 extends horizontally and is driven to rotate by the servo drive motor 61. The lead screw nut 63 is fitted onto the lead screw 62, and when the lead screw 62 rotates, the lead screw nut 63 performs a linear reciprocating motion along the axial direction. An active slider assembly 64 is externally sleeved and fixed to the lead screw nut 63.

[0063] The lower end of the first connecting rod 65 is hinged to the active slider assembly 64, and the upper end is hinged to the upper mounting plate hinged fixing base 69 fixed on the bottom surface of the upper mounting plate 7. The lower end of the second connecting rod 66 is hinged to the lower mounting plate hinged fixing base 68 fixed on the lower mounting plate 8, and the upper end is hinged to the passive slider assembly 67 mounted on the slide rail of the upper mounting plate 7.

[0064] Its operating principle is as follows: When the servo drive motor 61 drives the lead screw 62 to rotate, it drives the active slider assembly 64 to move inward in the horizontal direction, approaching the fixed base 68. Since the lengths of the first link 65 and the second link 66 remain unchanged, the shortening of the horizontal distance forces the intersection angle between the first link 65 and the second link 66 to increase, thereby driving the upper mounting plate 7 to rise smoothly in the vertical direction relative to the lower mounting plate 8. Conversely, controlling the active slider 64 to move outward enables the folding and storage of the X-shaped scissor lift module within the lifting space on both sides of the lower vehicle body 2.

[0065] See Figure 5 and Figure 9 The roof opening and closing mechanism 4 is used to realize the automatic opening and closing of the roof, so that the flying module can be lifted to the top of the vehicle body by the lifting drive device 6 in the extended state. The front rotor assembly 51 and the rear rotor assembly 52 are deployed to provide lift for the flying car.

[0066] Specifically, the linear guide rail 12 is fixed longitudinally along the two sides of the top of the upper body 1. The roof cover 46 adopts a multi-link folding structure, which is made of multiple narrow strip plates hinged together. The drive assembly includes a stepper motor 41, a main synchronous pulley 42, a driven synchronous pulley 43, and a synchronous belt 44.

[0067] A stepper motor 41 is fixed to the end of the vehicle body and drives a timing belt slider 45 to slide along the guide rail via a timing belt 44. The slider 45 is connected to the traction end of the roof cover 46. When it needs to be opened, the stepper motor 41 pulls the timing belt slider 45, and the blades of the roof cover 46 fold and retract to the front of the vehicle body in sequence, fully exposing the lifting channel in the middle; when it needs to be closed, the stepper motor 41 reverses, and the roof cover 46 unfolds along the guide rail, with the blades sealed together by sealing strips to form a rainproof and dustproof closed roof.

[0068] Please see Figure 10 and Figure 11The tandem dual-rotor flight module 5 is integrated and mounted on the upper mounting plate 7, including a front rotor assembly 51 and a rear rotor assembly 52 distributed longitudinally. In order to accommodate the large-span tandem dual rotors within the limited vehicle width, this embodiment adopts a differentiated folding and staggered stacking scheme.

[0069] For the front rotor assembly 51, the axis of its front rotor hub 515 is arranged parallel to the longitudinal centerline of the vehicle body. The front rotor assembly 51 includes a first front rotor blade 513 and a second front rotor blade 514, both of which are mounted on the front rotor hub 515 via their respective series hinge mechanisms. When folded, the first front rotor blade 513 remains in a relatively fixed position, while the second front rotor blade 514 rotates sequentially around two axes via the series front rotor first hinge 511 and front rotor second hinge 512, ultimately achieving a large-angle 180° fold and tightly overlapping to the side of the first blade 513. This design results in an extremely narrow width of the front rotor when folded.

[0070] For the rear rotor assembly 52, the axis of its rear rotor hub 524 is arranged perpendicular to the longitudinal centerline of the vehicle body. The rear rotor assembly 52 includes a first rear rotor blade 522 and a second rear rotor blade 523. When folded, these two blades are folded inward horizontally by 90 degrees around the rear rotor hinge 521 mounted at their respective roots on the rear rotor hub 524, and stored parallel to the rear of the vehicle body.

[0071] See Figure 11 To avoid spatial interference after the front and rear rotors are folded, the mounting plane of the rear rotor assembly 52 is designed to be higher than that of the front rotor assembly 51 in the vertical direction. In the stowed state, the folded rear rotor assembly 52 is precisely suspended above the folded front rotor assembly 51, forming a non-interfering, highly staggered stacked structure. This three-dimensional storage method compresses the lateral width of the flight module to the extreme.

[0072] See Figure 10 and Figure 11 This application embodiment adopts a "power source following and lifting" arrangement, which greatly simplifies the transmission path. The power source includes an engine 531 and a matching fuel tank, which is directly installed inside the tandem dual-rotor flight module 5, located between the front and rear rotors. This means that the engine 531 rises and falls together with the tandem dual-rotor flight module 5, eliminating the need for a complex telescopic vertical drive shaft. The power transmission path is as follows: the output shaft of the engine 531 is connected to the engine main pulley 532, and the engine is driven to rotate from the pulley 533 and the drive shaft 535 via a high-strength belt 534. The drive shaft 535 extends longitudinally along the vehicle body, connecting to the gearboxes of the front and rear rotors respectively.

[0073] At the front of the vehicle body, the drive shaft 535 drives the main bevel gear 536 of the front rotor, which in turn drives the front rotor meshing with the main bevel gear 536 to rotate from the bevel gear 537, thereby driving the front rotor hub 515 to rotate, thus realizing the rotation of the front rotor; at the rear of the vehicle body, the drive shaft 535 drives the main bevel gear 538 of the rear rotor, which in turn drives the rear rotor meshing with the main bevel gear 538 to rotate from the bevel gear 539, thereby driving the rear rotor hub 524 to rotate, thus realizing the rotation of the rear rotor.

[0074] In addition, by presetting the installation direction or gear ratio parameters of the front and rear bevel gear sets, the front and rear rotors are ensured to rotate at the same speed but in opposite directions, thereby effectively counteracting the flight counter-torque, eliminating the need for an additional tail rotor structure and improving aerodynamic efficiency.

[0075] The specific working principle is as follows: When the flying car needs to switch from land mode to flight mode, the control system executes the following control logic according to a preset sequence: First, the roof opening and closing mechanism 4 is activated, the stepper motor 41 starts and drives the synchronous belt 44 to rotate, pulling the roof cover 46 to fold and retract towards the front, thereby fully exposing and opening the flight module receiving cavity outlet on the top. After the roof is opened to the correct position, the servo drive motor 61 starts working, driving the lead screw 62 to rotate, pushing the active slider 64 to move inward and closer to the fixed base; the displacement of the active slider 64 forces the X-shaped scissor lift module to gradually extend from the retracted state, smoothly pushing the upper mounting plate 7 and the tandem dual-rotor flight module 5 integrated thereon to the predetermined working height above the vehicle body. Subsequently, the rotor deployment is executed. Engine 531 ignites and drives the front rotor hub 515 and rear rotor hub 524 to rotate. Utilizing the centrifugal force generated by the rotating blades, the second blade 514 of the front rotor assembly 51 automatically reverses and flips 180° to reset. Simultaneously, it drives the first and second blades 522 and 523 of the rear rotor assembly 52 to extend outwards by 90°. After the rotors are fully deployed and locked, engine 531 increases its power output. Power is transmitted to the front and rear rotors via belt 534, drive shaft 535, and bevel gear set, driving the rotors to rotate at high speed and adjusting the collective pitch of the front and rear rotors to achieve vertical takeoff of the flying car.

[0076] Conversely, when the flying car needs to switch from flight mode to land mode, the control system performs a reverse operation: first, the engine 531 is shut down and the rotor is braked to a stop; then, the rotor is manually folded: the operator manually folds and resets the front and rear rotor components according to the aforementioned differentiated folding logic by climbing to the roof or using a special long-handled tool on the ground; then, the servo drive motor 61 rotates in the opposite direction, driving the X-shaped scissor lift module to retract and descend smoothly until the bottom surface of the upper mounting plate 7 is completely against the rigid limit stop 21 of the lower body, completing the mechanical locking and load transfer; finally, the stepper motor 41 reverses, driving the roof cover 46 to unfold and close along the guide rail, completing the sealed storage of the entire vehicle.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A built-in lift-and-fly car based on a tandem dual-rotor configuration, characterized in that, include: The vehicle body assembly includes a lower body (2) and an upper body (1) covering the lower body (2). The lower body (2) contains a passenger cabin and elevator installation spaces on both sides of the passenger cabin. The upper body (1) and the lower body (2) together enclose a flight module receiving cavity for storing flight components. The roof opening and closing mechanism (4) is located at the top opening of the upper body (1), including a multi-link roof cover (46) and a drive assembly, having a closed position that can close the flight module receiving cavity and an open position that exposes the lifting channel. The lifting drive device (6) is installed in the elevator installation space, including X-type scissor lift modules symmetrically arranged on the left and right sides of the passenger cabin. The bottom of the X-type scissor lift module is fixedly connected to a lower mounting plate (8), and the top is connected to an upper mounting plate (7). The tandem dual-rotor flight module (5) is integrated and installed on the upper mounting plate (7), including a power source, a transmission system, and a front rotor assembly (51) and a rear rotor assembly (52) distributed along the longitudinal axis of the vehicle body. The state switching logic is as follows: when the flying car is in the ground state, the front rotor assembly (51) and the rear rotor assembly (52) fold inward, the lifting drive device (6) is in the retracted state and drives the flying module to descend into the flying module housing cavity, and the roof opening and closing mechanism is in the closed position; when the flying car is in the flight state, the roof opening and closing mechanism (4) is in the open position, the lifting drive device (6) is in the extended state and lifts the flying module to the top of the vehicle body, and the front rotor assembly (51) and the rear rotor assembly (52) unfold and provide lift.

2. The built-in elevating flying car as described in claim 1, characterized in that, The lifting drive device (6) includes two sets of X-shaped scissor lift modules symmetrically arranged on the left and right sides of the passenger compartment. Upper mounting plate (7) has upper mounting plate hinged fixing bases (69) fixedly installed at its four corners, and lower mounting plate (8) has lower mounting plate hinged fixing bases (68) fixedly installed at its four corners. Each X-shaped scissor lift module includes a servo drive motor (61) fixedly installed on the lower mounting plate (8), a lead screw (62) connected to the servo drive motor (61), and a lead screw nut (63) fitted onto the lead screw (62). The lead screw (62) has a nut (63) on its outer side. A slide rail with an active slider assembly (64) is installed in parallel. The active slider assembly (64) is fixedly connected to the corresponding lead screw nut (63). A slide rail with a passive slider assembly (67) is installed on the upper mounting plate (7) corresponding to the upper slide rail on the lower mounting plate (8). The lower ends of the two intersecting first connecting rods (65) and second connecting rods (66) are respectively hinged to the corresponding active slider assembly (64) and the lower mounting plate hinged fixing base (68), and the upper ends are respectively hinged to the corresponding passive slider assembly (67) and the upper mounting plate hinged fixing base (69).

3. The built-in elevating flying car as described in claim 2, characterized in that, The intersecting first link (65) and second link (66) are hinged at the central intersection point by a pivot.

4. The built-in elevating flying car as described in claim 1, characterized in that, The lower body (2) is provided with rigid limit stops (21) at the four corners of the top of the lower body (2) to limit the lower position of the lifting drive device (6). The upper body (1) is provided with a safety limit structure (11) to limit the upper position of the lifting drive device (6). The safety limit structure (11) consists of two baffles fixed to the inner wall of the upper body (1).

5. The built-in elevating flying car as described in claim 1, characterized in that, The tandem dual-rotor flight module (5) adopts a differentiated folding structure. The hub axis of the front rotor assembly (51) is arranged parallel to the longitudinal center line of the vehicle body and adopts a double-hinge multi-stage folding mechanism. The front rotor assembly (51) includes a front rotor first blade (513) with a fixed position and a front rotor second blade (514) that can be folded 180° relative to the front rotor first blade (513). The hub axis of the rear rotor assembly (52) is arranged perpendicular to the longitudinal center line of the vehicle body and adopts a single-hinge inward folding mechanism. The rear rotor assembly (52) includes a rear rotor first blade (522) and a rear rotor second blade (523) that can be folded horizontally inward by 90° around their respective root hinges.

6. The built-in elevating flying car as described in claim 5, characterized in that, The tandem dual-rotor flight module (5) further includes a front rotor hub (515) and a rear rotor hub (524); the first blade (513) and the second blade (514) of the front rotor are respectively mounted on the front rotor hub (515) through their respective independent sets of tandem folding mechanisms; each set of tandem folding mechanisms includes a front rotor first hinge (511) fixedly mounted on the front rotor hub (515), and a connector connected to the front rotor first hinge (511). The second hinge (512) of the front rotor at the movable end is connected to the other end of the second hinge (512) of the front rotor at the root of the blade; the second blade (514) of the front rotor can be rotated 180° and stacked on the side of the first blade (513) of the front rotor with a relatively fixed position by means of the series folding mechanism; the first blade (522) of the rear rotor and the second blade (523) of the rear rotor are respectively installed on the rear rotor hub (524) through the rear rotor hinge (521).

7. The built-in elevating flying car as described in claim 6, characterized in that, The power source includes an engine (531) and a matching fuel tank located between the front rotor assembly (51) and the rear rotor assembly (52) in the tandem dual rotor flight module (5). The transmission system includes a drive shaft (535) with an engine drive pulley (533) installed on it. The output end of the engine (531) is connected to an engine main pulley (532) that drives the engine drive pulley (533) and the drive shaft (535) to rotate via a belt (534). The front rotor assembly (51) and the rear rotor assembly (52) are respectively provided with rotor gearboxes with bevel gear sets. The two ends of the drive shaft (535) are respectively connected to the corresponding rotor gearboxes of the front rotor assembly (51) and the rear rotor assembly (52), which are used to convert the horizontal rotational power into the vertical rotational power and drive the front rotor hub (515) and the rear rotor hub (524) to rotate at the same speed but in opposite directions, thereby driving the front and rear rotors to rotate.

8. The built-in elevating flying car as described in claim 7, characterized in that, The rotor gearbox corresponding to the front rotor assembly (51) is provided with a front rotor main bevel gear (536) and a front rotor driven bevel gear (537) meshing with each other. The front rotor main bevel gear (536) is fixedly connected to the drive shaft (535), and the front rotor driven bevel gear (537) is fixedly connected to the front rotor hub (515) through a rotating shaft. The rotor gearbox corresponding to the rear rotor assembly (52) is provided with a rear rotor main bevel gear (538) and a rear rotor driven bevel gear (539) meshing with each other. The rear rotor main bevel gear (538) is fixedly connected to the drive shaft (535), and the rear rotor driven bevel gear (539) is fixedly connected to the rear rotor hub (524) through a rotating shaft.

9. The built-in elevating flying car as described in claim 8, characterized in that, In the tandem dual-rotor flight module (5), the front rotor assembly (51) and the rear rotor assembly (52) are arranged in a staggered stacked manner without interfering with each other, and the mounting plane of the rear rotor assembly (52) in the vertical direction is higher than that of the front rotor assembly (51).

10. The built-in elevating flying car as described in claim 1, characterized in that, The roof opening and closing mechanism (4) includes a linear guide rail (12) set on the top two sides of the upper body (1), a multi-link roof cover (46) slidably mounted on the linear guide rail (12), and a drive assembly. The traction end of the roof cover (46) is provided with a synchronous belt slider (45). The drive assembly includes a stepper motor (41) fixed to the end of the upper body (1) and a main synchronous pulley (42) and a slave synchronous pulley (43) connected by a synchronous belt (44). The stepper motor (41) drives the roof cover (46) to slide and fold along the linear guide rail (12) through the synchronous belt slider (45) connected on the synchronous belt (44) to open or close the top opening of the flight module receiving cavity.

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