A flying car power unit based on hub motor

Abstract

This invention discloses a power unit for a flying car based on a hub motor, belonging to the field of flying cars. It integrates ground driving and aerial flight into a single power unit, switching modes through changes in operating conditions. The wheel-mounted motors drive the vehicle's motion, while the propeller motors drive the propellers via hub motors mounted on a support shaft. The wheels and propeller share a hollow support shaft for rotational support, and the telescopic hydraulic structure for wheel reversal is integrated with the shock-absorbing suspension structure. The overall design is compact, simplifying the power unit structure and effectively reducing the vehicle's unsprung mass.

Description

Technical Field

[0001] This invention belongs to the field of flying cars, specifically relating to a flying car power unit based on a hub motor. Background Technology

[0002] Flying cars are an effective combination of automobiles and aircraft, allowing them to drive on the ground and soar in the sky. The emergence of flying cars can effectively solve problems such as ground traffic congestion, but due to technological complexity and other reasons, they have not yet been widely used, although their future is bright.

[0003] The flight (takeoff, landing, and navigation) propulsion system of flying cars generally consists of a propeller or ducted fan, while the vehicle (driving) propulsion system is basically the same as that of a conventional car. Currently, flying cars can be divided into two categories based on the configuration of their propulsion systems. One type is the independent type, where the vehicle propulsion system and the flight propulsion system are independent mechanisms, and the vehicle wheels do not need to change orientation when switching between vehicle and flight modes. However, because the vehicle propulsion system and the flight propulsion system operate independently in independent flying cars, the overall vehicle structure is larger and heavier. The other type is the convertible type, where the vehicle propulsion system and the flight propulsion system are generally integrated into a single power system (wheel system), and the vehicle wheels undergo orientation changes when switching between vehicle and flight modes. Convertible flying cars have the advantages of smaller overall size and lighter weight, and have a promising development trend.

[0004] Currently, the wheel system of convertible flying cars generally integrates components such as drive motors, reducers, and clutches, resulting in a large unsprung mass and easily causing problems with poor handling and stability. Summary of the Invention

[0005] The technical problem to be solved:

[0006] To overcome the shortcomings of existing technologies, this invention provides a flying car power unit based on hub motors. This is a transformable flying car power unit where the wheel drive and propeller flight drive use independent drive motors. The wheel-side motors for wheel drive are mounted on the frame, while the propeller drive is achieved through hub motors mounted on a support shaft. The wheels and propeller share a hollow support shaft for rotational support, and the telescopic hydraulic structure for wheel reversal is integrated with the shock-absorbing suspension structure. The overall design is compact, simplifying the power unit structure and effectively reducing the vehicle's unsprung mass.

[0007] The technical solution of the present invention is: a flying car power unit based on a hub motor, comprising: a hub, an inner shaft, a support shaft, a hub motor, a propeller, a wheel-side motor, a mounting frame, and a telescopic vibration damping mechanism;

[0008] The outer end of the inner shaft is coaxially fixed to the wheel hub, and the inner end of the inner shaft is connected to the output shaft of the wheel-side motor through a universal joint; the wheel-side motor is fixed to the frame, and its output shaft is set horizontally. The wheel-side motor is used to provide power for the rotation of the wheel hub in driving mode.

[0009] The support shaft is coaxially fitted onto the outer diameter of the inner shaft, and the two are rotatably connected; the hub motor is a hollow motor, coaxially fitted onto the outer diameter of the support shaft, and its inner ring is tightly fitted with the outer diameter wall of the support shaft; the propeller is fitted onto the outer diameter of the hub motor and tightly fitted with the outer ring of the hub motor; the propeller is located in the inner cavity of the hub and is used to provide flight propulsion in flight mode; the hub motor provides power for the rotation of the propeller;

[0010] The mounting bracket is fixed to the vehicle frame. The end of the mounting bracket facing the wheel hub is hinged to the inner end of the support shaft, and its top end is hinged to one end of the telescopic damping mechanism. The other end of the telescopic damping mechanism is hinged to the upper edge of the inner end of the support shaft. The telescopic damping mechanism is used to switch the position of the power unit in flight mode and driving mode, and is used for damping in driving mode.

[0011] A further technical solution of the present invention is as follows: In the driving mode, the wheel hub is in a vertical state, the wheel-side motor output shaft, the universal joint, and the inner shaft are horizontally coaxial, and the telescopic damping mechanism is in a retracted state; in the flight mode, the wheel hub is in a horizontal state, the wheel-side motor output shaft is perpendicular to the inner shaft, and both ends of the universal joint are vertical, and the telescopic damping mechanism is in an extended state.

[0012] A further technical solution of the present invention is: one end of the inner shaft is provided with a connecting flange for fixed connection with the hub by bolts; the middle part of the inner shaft is a smooth shaft section for mounting the inner bearing and rotating connection with the support shaft; the other end of the inner shaft is a prism structure for anti-rotation sleeve fixation with the universal coupling.

[0013] A further technical solution of the present invention is: a brake disc is coaxially provided at one end of the inner shaft near the connecting flange for mounting a brake caliper assembly.

[0014] A further technical solution of the present invention is as follows: the main body of the support shaft is a hollow shaft structure, one end of which has an inner diameter wall that is tightly fitted with the outer ring of the inner bearing, and a hub motor is sleeved on the outer diameter wall of this end, which is rotatably connected to the propeller mounting part through the hub motor; the other end is provided with a hinge shaft and a first hinge hole, the two hinge shafts are horizontally arranged and symmetrically arranged on both sides of the end of the support shaft, the axis of the hinge shaft intersects the axis of the support shaft perpendicularly, and is used to hinge with the mounting frame; the first hinge hole is located at the upper edge of the end of the support shaft, parallel to the hinge shaft, and is used to hinge with the telescopic vibration damping mechanism through a pin.

[0015] A further technical solution of the present invention is as follows: the mounting frame includes a vertical rod and two horizontal rods; the vertical rod is vertically fixed to the vehicle frame; the two horizontal rods are symmetrically arranged and vertically fixed to the bottom end of the vertical rod on the side away from the vehicle frame; the end of the horizontal rod is provided with a through hole for hinged connection with the hinge shaft of the support shaft; the upper end of the vertical rod is provided with a connecting lug, and the connecting lug is provided with a second hinge hole parallel to the through hole of the horizontal rod for hinged connection with the telescopic vibration damping mechanism through the pin.

[0016] A further technical solution of the present invention is: the propeller includes a mounting shaft and a plurality of blades evenly distributed and fixed to the outer diameter of the mounting shaft; the mounting shaft serves as the mounting part of the propeller and has mounting holes along its axis, the inner wall of the mounting holes being tightly fitted with the outer ring of the hub motor.

[0017] A further technical solution of the present invention is as follows: the telescopic damping mechanism includes a telescopic hydraulic cylinder and a damping spring coaxially mounted on the outside of the hydraulic cylinder; when the hydraulic cylinder extends, it pushes the upper edge of the inner end of the support shaft to rotate around the hinge point between the mounting bracket and the support shaft to a horizontal position, with the wheel hub parallel to the ground; when the hydraulic cylinder retracts and resets, it pulls the support shaft to rotate and reset, with the wheel hub perpendicular to the ground. At this time, the damping spring and the two ends of the hydraulic cylinder elastically resist each other, thus playing a damping role in the driving state of the wheel.

[0018] Beneficial effects

[0019] The beneficial effects of this invention are as follows: Compared with existing convertible flying car technologies, the in-wheel motor-based power unit of this invention eliminates the clutch design. The wheel-side motor, integrating the drive motor and reducer, is fixed to the frame, forming a wheel-side motor drive mode, thus reducing the load on the wheel system. The in-wheel motor, coaxially mounted on the support shaft, provides power to the propeller, coaxially mounted on the outer ring of the in-wheel motor. In car driving mode, the output shaft of the wheel-side motor operates, driving the inner shaft and subsequently the wheel hub to rotate, achieving the wheel driving function. In flight mode, the wheel flips to a horizontal position, the in-wheel motor operates, directly driving the propeller to rotate, generating flight thrust. This structural form changes the traditional power unit layout of convertible flying cars, avoiding the structural complexity and large unsprung mass problems caused by integrating drive motors, reducers, and clutches into the wheel system in existing technologies.

[0020] In this invention, the wheel hub and the propeller share a hollow support shaft. The inside of the support shaft is connected to the inner shaft through an inner bearing, and the outside of the support shaft serves as the fixed shaft of the hub motor. The rotating housing of the hub motor is tightly connected to the propeller, making the structure more compact and thus reducing the unsprung weight.

[0021] In this invention, the telescopic hydraulic structure used for wheel reversing is integrated with the shock-absorbing suspension structure into a telescopic shock-absorbing mechanism. The telescopic hydraulic cylinder and the shock-absorbing spring share a central axis, with the telescopic hydraulic cylinder inside and the shock-absorbing spring outside, which simplifies the structure and reduces the unsprung weight.

[0022] In vehicle driving mode, this invention controls the rotational speed of the wheel-side motor output shafts in the four power units via the vehicle control system. This allows the vehicle to perform turning and U-turns by changing the wheel speed, thus eliminating the need for a traditional steering mechanism and simplifying the structure. In flight mode, the control system controls the rotational speed of the hub motors in the four power units, thereby controlling the rotational speed of the four propellers to achieve flight functionality. The wheel-side motors and hub motors can be controlled independently. Attached Figure Description

[0023] Figure 1 This is an overall structural outline of the power unit according to an embodiment of the present invention (driving mode);

[0024] Figure 2 This is an external view of the overall structure of the power unit according to an embodiment of the present invention (flight mode);

[0025] Figure 3 This is a schematic diagram of the internal structure of the power unit in an embodiment of the present invention (driving mode);

[0026] Figure 4 for Figure 3 Diagram showing the installation relationship of the middle components;

[0027] Figure 5 This is a schematic diagram of the internal structure of the power unit in an embodiment of the present invention (flight mode);

[0028] Figure 6 for Figure 5 Diagram showing the installation relationship of the middle components;

[0029] Figure 7 This is a schematic diagram of the hub structure in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the inner shaft structure in an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the brake caliper assembly structure in an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the support shaft structure in an embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the telescopic vibration damping mechanism in an embodiment of the present invention;

[0034] Figure 12This is a schematic diagram of the mounting bracket structure in an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the universal joint structure in an embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the propeller structure in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached drawings: 1. Tire, 2. Hub, 3. Bolt, 4. Inner shaft, 401. Connecting flange, 402. Brake disc, 403. Smooth shaft section, 5. Brake caliper assembly, 501. Mounting ring, 502. First brake caliper, 503. Second brake caliper, 6. Hub motor, 7. Inner bearing, 8. Support shaft, 801. Hinge shaft, 802. First hinge hole, 9. Telescopic vibration damping mechanism, 901. Hydraulic cylinder, 902. Vibration damping spring, 10. Mounting bracket, 101. Vertical rod, 102. Horizontal rod, 11. Wheel-side motor, 12. Universal coupling, 13. Propeller. Detailed Implementation

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] See Figure 1 , 2 This embodiment provides a power unit for a flying car based on a hub motor. The purpose is to provide a power unit solution that is different from existing convertible flying cars, so as to simplify the existing power unit structure, reduce the unsprung mass of the flying car, and have the characteristics of compact structure and light unsprung mass, which is beneficial to the handling and stability of the car.

[0041] In this embodiment, four sets of in-wheel motor-based flying car power units are assembled and installed on the vehicle body. For example... Figure 1 As shown, when the flying car is in ground driving mode, the wheel hub 2 in the power unit is in a vertical position, perpendicular to the ground, and its working state is the same as that of a wheel in a regular vehicle. Figure 2As shown, when the flying car is in vertical take-off and landing and air navigation mode, the wheel hub 2 in the power unit is in a horizontal state, parallel to the ground, and the four wheels work together to provide power through the rotation of the propeller 13.

[0042] See Figure 1-6 The flying car power unit based on hub motor provided in this embodiment includes a tire 1, a hub 2, an inner shaft 4, a support shaft 8, a telescopic damping mechanism 9, a mounting frame 10, a wheel-side motor 11, a hub motor 6, and a propeller 13.

[0043] See also Figure 7 A tire 1 is mounted on the outer diameter of the wheel hub 2. The outer side of the hub 2 has a spoke structure, and the center of the spoke structure is the hub mounting plate. The hub mounting plate is fixedly connected to the outer end of the inner axle 4 by multiple bolts 3. Specifically, the inner axle 4 is coaxial with the hub 2, located inside the hub 2, and is used to drive the hub 2 to rotate. Figure 8 As shown, the outer side of the inner shaft 4 is a connecting flange 401 structure. The connecting flange 401 has five threaded holes evenly distributed around its circumference. Five bolts 3 pass through the hub mounting plate and the connecting flange 401 to achieve a fixed connection between the inner shaft 4 and the hub 2. The middle part of the inner shaft 4 is a smooth shaft section 403. The inner bearing 7 is coaxially fitted onto the smooth shaft section 403. The inner ring of the inner bearing 7 is tightly fitted with the smooth shaft section 403 of the inner shaft 4. The inner shaft 4 is used to achieve a rotatable connection between the inner shaft 4 and the support shaft 8. The inner end of the inner shaft 4, i.e., the end furthest from the connecting flange 401, is a quadrangular prism structure, used for anti-rotation connection and fixation with the universal coupling 12.

[0044] Universal joint 12 serves as a drive connector, with one end connected to the output shaft of wheel-side motor 11 and the other end connected to the tetragonal prism end of inner shaft 4. For example... Figure 13 As shown, the universal joint 12 has a square recess at one end facing the inner shaft 4 that matches the tetrahedral shape of the inner shaft 4, for anti-rotation and fixing when the two are fitted together. The wheel-side motor 11 is fixed to the frame and is a powertrain integrating a drive motor and a reducer. The output shaft of the wheel motor 11 is horizontally positioned and provides power for the rotation of the wheel hub 2 in driving mode. The wheel-side motor 11 is electrically connected to the vehicle control system and its operation is controlled by the vehicle control system.

[0045] See Figure 3 , 1014. The support shaft 8 is a hollow sleeve structure, with one end being cylindrical and the other end being irregularly shaped. The cylindrical end of the support shaft 8 faces the inner shaft 4 and is coaxially fitted inside the inner shaft 4, i.e., the side facing away from the inner shaft 4 connecting flange 401. The inner diameter wall of the support shaft 8 is tightly fitted with the outer ring of the inner bearing 7. The propeller 13 is coaxially fitted onto the support shaft 8, and the propeller 13 and the support shaft 8 are rotatably connected via a hub motor 6. Specifically, the hub motor 6 is installed on the outer diameter wall of the cylindrical end of the support shaft 8. The hub motor 6 is a hollow motor, with the support shaft 8 as the mounting shaft. Its inner ring is tightly fitted with the outer diameter wall of the support shaft 8, and its outer ring is fitted with the propeller 13. The propeller 13 includes a mounting shaft and multiple blades evenly distributed and fixed to the outer diameter of the mounting shaft. The mounting shaft serves as the mounting part of the propeller 13, and has mounting holes along its central axis. The inner wall of the mounting hole on the central shaft of the propeller 13 is tightly fitted with the outer ring (i.e., the rotating housing) of the hub motor 6. The propeller 13 is located entirely within the inner cavity of the hub 2, providing propulsion in flight mode. The propeller 13 is powered directly by the hub motor 6, whose outer ring drives its rotation. The hub motor 6 is electrically connected to the vehicle's control system and is controlled by it.

[0046] See Figure 3 , 9 To achieve wheel braking, a brake disc 402 is coaxially mounted on the inner axle 4 near the connecting flange 401 for mounting the brake caliper assembly 5. For example... Figure 9 As shown, the brake caliper assembly 5 includes a mounting ring 501, a first brake caliper 502, and a second brake caliper 503. The first brake caliper 502 and the mounting ring 501 are an integral structure. The mounting ring 501 is coaxially fitted onto the inner shaft 4, located inside the brake disc 402 and outside the support shaft 8, and is fixedly connected to the outer end face of the cylindrical end of the support shaft 8. The first brake caliper 502 and the second brake caliper 503 cooperate to clamp the brake disc 402 in the brake groove between them. Braking is achieved through friction between the brake caliper assembly 5 and the brake disc 402. The brake caliper assembly 5 is controlled by the vehicle control system.

[0047] See Figure 3 , 4 10. The irregularly shaped end of the support shaft 8 is provided with a hinge shaft 801 and a first hinge hole 802. The two hinge shafts 801 are horizontally arranged and symmetrically located on both sides of the end of the support shaft 8. The axis of the hinge shaft 801 intersects the axis of the support shaft 8 perpendicularly. The hinge shaft 801 is used to hinge with the horizontal end of the mounting bracket 10. The first hinge hole 802 of the support shaft 8 is located at the upper edge of the end of the support shaft 8 and is parallel to the hinge shaft 801. It is used to hinge with one end of the telescopic vibration damping mechanism 9 through a pin.

[0048] See Figure 1-611-12, Mounting bracket 10 is fixed to the vehicle frame. Mounting bracket 10 includes a vertical rod 101 and two horizontal rods 102. The vertical rod 101 has a V-shaped structure, with the V-shaped opening facing downwards and vertically fixed to the vehicle frame. The two horizontal rods 102 are symmetrically arranged and vertically fixed to the bottom end of the V-shaped opening on the side of the vertical rod 101 facing away from the vehicle frame. The outer end of the horizontal rod 102 has a through hole for hinged connection with the hinge shaft 801 of the support shaft 8. The upper end of the vertical rod 101 is provided with a connecting lug on the same side as the horizontal rod 102. The connecting lug has a second hinge hole parallel to the through hole of the horizontal rod 102 for hinged connection with the other end of the telescopic vibration damping mechanism 9 through which a pin passes.

[0049] See Figure 1-6 , Figure 11 The telescopic damping mechanism 9 includes a telescopic hydraulic cylinder 901 and a damping spring 902 coaxially mounted on the outside of the hydraulic cylinder 901. The hydraulic cylinder 901 is connected to the hydraulic system and controlled by the vehicle control system. The telescopic end of the hydraulic cylinder 901 is hinged to the first hinge hole 802 of the support shaft 8, and the fixed end of the hydraulic cylinder 901 is hinged to the second hinge hole of the mounting bracket 10. The axis of the telescopic damping mechanism 9 is coplanar with the axis of the support shaft 8. When the telescopic end of the hydraulic cylinder 901 extends, it pushes the upper edge of the inner end of the support shaft 8 to rotate horizontally around the mounting bracket 10 and the hinge shaft 801 of the support shaft 8, making the wheel hub 2 parallel to the ground, and the power unit switches to flight mode; when the hydraulic cylinder 901 retracts and resets, it pulls the support shaft 8 to rotate and reset, making the wheel hub 2 perpendicular to the ground, and the power unit switches to driving mode. At this time, the damping spring 902 is in a contracted state, elastically resisting the two ends of the hydraulic cylinder 901, and playing a damping role for the wheel when driving.

[0050] See Figure 1 , 3 4. In driving mode, the wheels are in a vertical position, with tire 1 in contact with the ground. The output shaft of the wheel-side motor 11, the universal joint 12, and the inner shaft 4 are coaxial. At this time, controlling the output speed of the wheel-side motor 11 drives the universal joint 12 to rotate via its output shaft, which in turn drives the inner shaft 4 to rotate, and finally drives the wheel hub 2 to rotate, thus rotating the wheel. In driving mode, the propeller 13 remains stationary. By controlling the wheel speeds of the four power units, the vehicle can perform turning and U-turns.

[0051] See Figure 2 , 5 6. In flight mode, driven by the telescopic damping mechanism 9, the support shaft 8 rotates around the hinge shaft 801 between the mounting bracket 10 and the support shaft 8, making the wheel horizontal. At this time, both ends of the universal joint 12 are vertical, and the wheel-side motor 11 is not working. By controlling the rotation of the hub motor 6, its rotating housing drives the propeller 13 to rotate, thereby generating flight propulsion. By controlling the speed of the propeller 13 in the four power units, the vehicle can perform actions such as climbing, cruising, descending, turning, and U-turns.

[0052] This invention integrates ground driving and air flight modules into a single power unit, which switches between different operating modes. It features a compact structure, diverse functions, and the characteristic of light unsprung mass, which is beneficial for vehicle handling and stability.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A power unit for a flying car based on a hub motor, characterized in that, include: Wheel hub, inner shaft, support shaft, wheel hub motor, propeller, wheel-side motor, mounting bracket, and telescopic vibration damping mechanism; The outer end of the inner shaft is coaxially fixed to the wheel hub, and the inner end of the inner shaft is connected to the output shaft of the wheel-side motor through a universal joint; the wheel-side motor is fixed to the frame, and its output shaft is set horizontally. The wheel-side motor is used to provide power for the rotation of the wheel hub in driving mode. The support shaft is coaxially fitted onto the outer diameter of the inner shaft, and the two are rotatably connected; the hub motor is a hollow motor, coaxially fitted onto the outer diameter of the support shaft, with its inner ring tightly fitted to the outer diameter wall of the support shaft; the propeller is fitted onto the outer diameter of the hub motor, tightly fitted to the outer ring of the hub motor; the propeller is located in the inner cavity of the hub and is used to provide flight propulsion in flight mode; the hub motor provides power for the rotation of the propeller; The mounting bracket is fixed to the vehicle frame. The end of the mounting bracket facing the wheel hub is hinged to the inner end of the support shaft, and its top end is hinged to one end of the telescopic damping mechanism. The other end of the telescopic damping mechanism is hinged to the upper edge of the inner end of the support shaft. The telescopic damping mechanism is used to switch the position of the power unit in flight mode and driving mode, and is used for damping in driving mode.

2. The flying car power unit based on a hub motor according to claim 1, characterized in that, In the driving mode, the wheel hub is vertical, and the output shaft of the wheel-side motor, the universal joint, and the inner shaft are horizontally coaxial, with the telescopic damping mechanism in a retracted state. In the flight mode, the wheel hub is horizontal, the output shaft of the wheel-side motor is perpendicular to the inner shaft, and both ends of the universal joint are vertical, with the telescopic damping mechanism in an extended state.

3. The flying car power unit based on a hub motor according to claim 1, characterized in that, One end of the inner shaft is provided with a connecting flange for fixing to the hub with bolts; the middle part of the inner shaft is a smooth shaft section for mounting the inner bearing and rotating the support shaft; the other end of the inner shaft is a prism structure for fixing to the universal joint anti-rotation sleeve.

4. The flying car power unit based on a hub motor according to claim 3, characterized in that, The inner shaft is coaxially mounted with a brake disc near the connecting flange end for mounting brake caliper assemblies.

5. The flying car power unit based on a hub motor according to claim 3, characterized in that, The main body of the support shaft is a hollow shaft structure. One end of its inner diameter wall is tightly fitted with the outer ring of the inner bearing, and a hub motor is sleeved on the outer diameter wall of this end. The hub motor is rotatably connected to the propeller mounting part. The other end of the support shaft is provided with a hinge shaft and a first hinge hole. The two hinge shafts are horizontally arranged and symmetrically located on both sides of the end of the support shaft. The axis of the hinge shaft intersects the axis of the support shaft perpendicularly and is used for hinged connection with the mounting bracket. The first hinge hole is located at the edge of the end of the support shaft and is parallel to the hinge shaft. It is used for hinged connection with the telescopic vibration damping mechanism through a pin.

6. The flying car power unit based on a hub motor according to claim 5, characterized in that, The mounting bracket includes a vertical rod and two horizontal rods; the vertical rod is vertically fixed to the vehicle frame; the two horizontal rods are symmetrically arranged and vertically fixed to the bottom end of the vertical rod on the side facing away from the vehicle frame; the outer end of the horizontal rod is provided with a through hole for hinged connection with the hinge shaft of the support shaft; the upper end of the vertical rod is provided with a connecting lug, and the connecting lug is provided with a second hinge hole parallel to the through hole of the horizontal rod for hinged connection with the telescopic vibration damping mechanism through a pin.

7. The flying car power unit based on a hub motor according to claim 5, characterized in that, The propeller includes a mounting shaft and multiple blades evenly distributed and fixed to the outer diameter of the mounting shaft; the mounting shaft serves as the mounting part of the propeller and has mounting holes along its axis, the inner wall of which is tightly fitted with the outer ring of the hub motor.

8. The flying car power unit based on a hub motor according to claim 1, characterized in that, The telescopic vibration damping mechanism includes a telescopic hydraulic cylinder and a damping spring coaxially mounted on the outside of the hydraulic cylinder. When the hydraulic cylinder extends, it pushes the upper edge of the inner end of the support shaft to rotate around the hinge between the mounting bracket and the support shaft to a horizontal position, with the wheel hub parallel to the ground. When the hydraulic cylinder retracts and resets, it pulls the support shaft to rotate and reset, with the wheel hub perpendicular to the ground. At this time, the damping spring and the two ends of the hydraulic cylinder elastically resist each other, which plays a role in damping the vibration of the wheel during driving.

Images