Flying car power device based on wheel-side motors

Abstract

The invention discloses a hovercar power device based on wheel-side motors, and belongs to the field of hovercars. According to the power device, the layout mode of a power device of a traditional conversion type hovercar is changed, the driving motor and the speed reducer are integrated and fixed to the car frame, a wheel side motor driving mode is formed, and power transmission in a traveling mode and a flying mode is carried out through cooperation of the two-way output wheel side motors and a set of gears used for driving the propellers to rotate. The wheels and the propellers share one hollow supporting shaft which is matched with the inner bearing and the outer bearing to support rotation of the wheels and the propellers. The telescopic vibration reduction mechanism is used for achieving switching of the flight mode position and the running mode position of the wheel and is used for vibration reduction in the running mode. The problems that in an existing traditional technical scheme, a driving motor, a speed reducer, a clutch and other parts are integrated in a wheel system, so that the structure is complex, and the automobile unsprung mass is large are solved, and the wheel system has the advantages of being compact in structure and light in automobile unsprung mass.

Description

Technical Field

[0001] The invention belongs to the field of flying cars, and in particular relates to a flying car power device based on wheel-side motors. Background Art

[0002] As a combination of aircraft and automobile, flying cars are dual-purpose vehicles that can switch between ground driving and sky flying. As a potential solution to problems such as ground traffic congestion, flying cars have a bright future. However, due to issues such as technical maturity, flying cars have only been tested in a small number of areas and have not yet formed a large scale.

[0003] The car (driving) power unit in a flying car is basically the same as a general car engine unit, while the flight (take-off and landing and navigation) power unit is the same as a general aircraft propulsion unit, which is composed of a ducted fan or a propeller. At present, flying cars can be divided into two categories according to the configuration characteristics of their power units. The first category is independent: in this category, the car power unit and the flight power unit are independent mechanisms, and the car wheels do not need to change their position when switching between car mode and flight mode. However, since the car power unit and the flight power unit in the independent flying car operate independently, the whole vehicle structure is large and the vehicle weight is also heavy. The second category is the conversion type: in this category, the car power unit and the flight power unit are generally integrated into a power system (wheel system), and the car wheels change their position when switching between car mode and flight mode. Compared with the independent flying car, the conversion flying car has the advantages of small vehicle structure and light weight. However, from the current design of the conversion flying car, the wheel system of the flying car generally integrates components such as the drive motor, the reducer and the clutch, resulting in a large unsprung mass of the car, which is easy to cause problems of poor controllability and stability. Summary of the invention

[0004] Technical issues to be solved:

[0005] In order to avoid the shortcomings of the prior art, the present invention provides a flying car power device based on wheel-side motors, which belongs to the power device of a transformable flying car. The device eliminates the clutch, integrates the drive motor and the reducer into a wheel-side motor and installs it on the frame. The wheel-side motor with two-way output cooperates with a group of gears for driving the propeller to rotate to transmit power in the driving mode and the flying mode. The wheels and the propellers share a hollow supporting shaft, and the telescopic hydraulic structure for wheel reversing is integrated with the vibration-damping suspension structure, which effectively reduces the unsprung mass of the car.

[0006] The technical solution of the present invention is: a flying car power device based on wheel-side motors, comprising:

[0007] The wheel assembly comprises a wheel hub, an inner shaft whose outer end is coaxially connected to the wheel hub and used to drive the wheel hub to rotate, a support shaft coaxially sleeved on the outer diameter of the inner shaft and rotatably connected to the inner shaft, and a propeller coaxially sleeved on the outer diameter of the support shaft and rotatably connected to the support shaft; the propeller is located in the inner cavity of the wheel hub and is used to provide flight propulsion in the flight mode;

[0008] The power and transmission assembly includes a two-way output wheel-side motor fixed to the frame, a universal joint connecting the horizontal output shaft of the wheel-side motor and the inner end of the inner shaft, and a gear set connecting the vertical output shaft of the wheel-side motor and the propeller;

[0009] The wheel vibration reduction and reversing assembly comprises a mounting frame fixed to a vehicle frame and a telescopic vibration reduction mechanism; the end of the mounting frame facing the wheel assembly is hinged to the inner end of a support shaft, and the top end of the mounting frame is hinged to one end of the telescopic vibration reduction mechanism; the other end of the telescopic vibration reduction mechanism is hinged to the upper edge of the inner end of the support shaft; the telescopic vibration reduction mechanism is used for switching the position of the wheel assembly between a flight mode and a driving mode, and for vibration reduction in the driving mode.

[0010] A further technical solution of the present invention is: in the driving mode, the wheel assembly as a whole is in a vertical state, and the horizontal output shaft of the wheel-side motor, the universal joint, and the inner shaft are coaxial; in the flight mode, the wheel assembly as a whole is flipped to a horizontal state around the hinge between the mounting frame and the support shaft under the push of the telescopic vibration reduction mechanism, the horizontal output shaft of the wheel-side motor is perpendicular to the inner shaft, and the two ends of the universal joint are vertical.

[0011] A further technical solution of the present invention is: a connecting flange is provided at one end of the inner shaft, which is used to be fixedly connected to the wheel hub by bolts; the middle part of the inner shaft is an optical shaft section, which is used to install the inner bearing and the support shaft for rotational connection; the other end of the inner shaft is a prismatic structure, which is used to be fixed with the universal joint anti-rotation sleeve.

[0012] A further technical solution of the present invention is that a brake disc is coaxially provided at one end of the inner shaft close to the connecting flange for installing a brake caliper assembly.

[0013] A further technical solution of the present invention is: the support shaft body is a hollow shaft structure, the inner diameter wall of one end of which is tightly matched with the outer ring of the inner bearing, and the outer diameter wall of this end is sleeved with an outer bearing, which is rotatably connected to the mounting part of the propeller through the outer bearing; the other end is provided with a hinge shaft and a first hinge hole, the two hinge shafts are horizontally arranged, symmetrically arranged on both sides of the end of the support shaft, the axis of the hinge shaft intersects with the axis of the support shaft vertically, and is used to be hinged 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 be hinged with the telescopic vibration damping mechanism through a pin shaft.

[0014] A further technical solution of the present invention is: the mounting frame includes a vertical rod and two cross rods; the vertical rod is vertically fixed to the frame; the two cross rods are symmetrically arranged and vertically fixed to the bottom end of the vertical rod on the side facing away from the frame; a through hole is provided at the end of the cross rod for articulating with the hinge shaft of the support shaft; a connecting ear is provided at the upper end of the vertical rod, and the connecting ear is provided with a second hinge hole parallel to the through hole of the cross rod, for passing the pin shaft through which it is articulated with the telescopic vibration damping mechanism.

[0015] A further technical solution of the present invention is: the propeller includes a mounting shaft and a plurality of blades evenly distributed and fixed on the outer diameter of the circumference of the mounting shaft; the mounting shaft serves as the mounting part of the propeller, and a mounting hole is provided along its axis, and the inner wall of the mounting hole is tightly matched with the outer ring of the outer bearing.

[0016] A further technical solution of the present invention is: the gear set includes a driving gear and a passive gear, the driving gear is coaxially fixedly connected to the vertical output shaft of the wheel-side motor; the passive gear is sleeved on the outer diameter of the support shaft, is rotationally connected to the support shaft, and is fixedly connected to the inner end surface of the propeller's mounting shaft; when the passive gear flips to a horizontal position with the wheel assembly, the driving gear and the passive gear are meshed.

[0017] A further technical solution of the present invention is: the telescopic vibration reduction mechanism includes a telescopic hydraulic cylinder and a vibration reduction spring coaxially mounted on the outside of the hydraulic cylinder; when the hydraulic cylinder is extended, it pushes the wheel assembly to flip to a horizontal state as a whole; when the hydraulic cylinder is retracted and reset, the wheel assembly is in a vertical state as a whole, and at this time, the vibration reduction spring and the two ends of the hydraulic cylinder elastically offset each other, thereby playing a vibration reduction role on the wheel assembly when driving.

[0018] Beneficial Effects

[0019] The beneficial effects of the present invention are as follows: the flying car power device based on wheel-side motors described in the present invention integrates wheels and propellers into one power device, has a compact structure, and can effectively realize the ground driving, vertical take-off and landing, and air navigation functions of the flying car by switching different working modes.

[0020] Compared with the existing technical solutions for transformable flying cars, the present invention adopts a dual-output shaft wheel-side motor with integrated drive motor and reducer, and fixes the wheel-side motor as a whole on the frame to form a wheel-side motor drive mode, which is conducive to reducing the weight of the wheel system. In the vehicle driving mode, the wheel-side motor works horizontally to the output shaft, driving the inner shaft and then driving the wheel hub to rotate, realizing the wheel driving function; in the flight mode, the wheel flips to a horizontal state, and the vertical output shaft of the wheel-side motor works to drive the drive gear to rotate, and then drives the passive gear to rotate, and drives the propeller to rotate through the passive wheel to generate flight thrust. This structural form changes the layout of the power device of the traditional transformable flying car, and at the same time cancels the clutch, avoiding the problems of complex structure and large unsprung mass of the car caused by the existing traditional technical solutions integrating components such as drive motors, reducers and clutches in the wheel system.

[0021] In the present invention, the wheel hub and the propeller share a hollow support shaft, the interior of the support shaft is connected to the inner shaft through an inner bearing, and the exterior is connected to the propeller through an outer bearing, so that the structure is more compact and the unsprung weight is reduced.

[0022] In the present invention, the telescopic hydraulic structure for wheel switching and the vibration-damping suspension structure are integrated into a telescopic vibration-damping mechanism, wherein the telescopic hydraulic cylinder and the vibration-damping spring share a central axis, the telescopic hydraulic cylinder is inside, and the vibration-damping spring is outside, which simplifies the structure and reduces the unsprung weight.

[0023] In the vehicle driving mode, the present invention controls the rotation speed of the horizontal output shaft of the wheel motor in the four power devices through the vehicle control system, so that the vehicle can turn and turn around on the spot by changing the wheel rotation speed, thereby eliminating the traditional steering mechanism design; in the flight mode, the control system controls the rotation speed of the vertical output shaft of the wheel motor in the four power devices, thereby controlling the rotation speed of the four propellers to realize the flight function. The horizontal output shaft and the vertical output shaft in the wheel motor can be controlled independently, and only one output shaft works at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structural appearance diagram of the power device of the embodiment of the present invention (driving mode);

[0025] Figure 2 The figure is the overall structural appearance diagram of the power device of the embodiment of the present invention (flight mode);

[0026] Figure 3 Schematic diagram of the internal structure of the power device of an embodiment of the present invention (driving mode);

[0027] Figure 4 for Figure 3 Schematic diagram of the installation relationship of some components in the middle;

[0028] Figure 5 This is a schematic diagram of the internal structure of the power device of an embodiment of the present invention (flight mode);

[0029] Figure 6 for Figure 5 Schematic diagram of the installation relationship of some components in the middle;

[0030] Figure 7 is a schematic diagram of the hub structure in an embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the inner shaft structure in an embodiment of the present invention;

[0032] Fig. 9 is a schematic structural diagram of a brake caliper assembly in an embodiment of the present invention;

[0033] Fig.10 is a schematic diagram of the support shaft structure in an embodiment of the present invention;

[0034] Fig.11 Schematic diagram of the telescopic vibration reduction mechanism in an embodiment of the present invention;

[0035] Fig.12 is a schematic diagram of the structure of a mounting frame in an embodiment of the present invention;

[0036] Fig.13 Schematic diagram of the structure of a universal coupling in an embodiment of the present invention;

[0037] Fig.14 Schematic diagram of the propeller structure in an embodiment of the present invention.

[0038] Explanation of the accompanying drawings: 1. Tire, 2. Wheel hub, 3. Bolt, 4. Inner shaft, 401. Connecting flange, 402. Brake disc, 403. Optical axis segment, 5. Brake caliper assembly, 501. Mounting ring, 502. First brake caliper, 503. Second brake caliper, 6. Outer bearing, 7. Inner bearing, 8. Support shaft, 801. Articulated shaft, 802. First articulated hole, 9. Telescopic vibration damping mechanism, 901. Hydraulic cylinder, 902. Vibration damping spring, 10. Mounting frame, 101. Vertical rod, 102. Cross rod, 11. Wheel-side motor, 111. Horizontal output shaft of wheel-side motor, 112. Vertical output shaft of wheel-side motor, 12. Universal joint, 13. Propeller, 14. Passive gear, 15. Driving gear. DETAILED DESCRIPTION

[0039] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] See also Figure 1 , 2 This embodiment provides a flying car power device based on wheel-side motors, with the purpose of providing a solution different from the power device of the existing transformable flying car, so as to simplify the structure of the existing power device and reduce the unsprung mass of the flying car. It has the characteristics of compact structure and light unsprung mass of the car, which is beneficial to the control and stability of the car.

[0042] In this embodiment, four sets of flying car power devices based on wheel-side motors are assembled and installed on the vehicle body. Figure 1 As shown in FIG. 1 , when the flying car is in ground driving mode, the wheels in the power unit are in a vertical state, perpendicular to the ground, and their working state is consistent with the wheels in a general vehicle. Figure 2 As shown, when the flying car is in vertical take-off and landing and aerial navigation mode, the wheels in the power unit are in a horizontal state, parallel to the ground, and the four wheels work together to provide power through the rotation of the propeller.

[0043] See also Figure 1-6 The flying car power device based on the wheel-side motor provided in this embodiment includes a tire 1, a wheel hub 2, an inner shaft 4, a support shaft 8, a telescopic vibration reduction mechanism 9, a mounting frame 10, a wheel-side motor 11, a propeller 13 and a pair of transmission gear sets.

[0044] See also Figure 7 A tire 1 is mounted on the outer diameter of the wheel hub 2. The outer side of the wheel hub 2 is a spoke structure. The center of the spoke structure is a wheel hub mounting plate. The wheel hub mounting plate is fixedly connected to the outer end of the inner shaft 4 by multiple bolts 3. Specifically, the inner shaft 4 is coaxial with the wheel hub 2, located inside the wheel hub 2, and is used to drive the wheel hub 2 to rotate. Figure 8As shown, the outer side of the inner shaft 4 is a connecting flange 401 structure, and the connecting flange 401 has five threaded holes evenly distributed around the circumference. Five bolts 3 are passed through the connecting hub mounting plate and the connecting flange 401 to realize the fixed connection between the inner shaft 4 and the hub 2. The middle part of the inner shaft 4 is an optical shaft section 403, and the inner bearing 7 is coaxially sleeved on the optical shaft section 403. The inner ring of the inner bearing 7 is tightly matched with the optical shaft section 403 of the inner shaft 4, and the inner shaft 4 is used to realize the rotation connection between the inner shaft 4 and the support shaft 8. The inner end of the inner shaft 4, that is, the end away from the connecting flange 401, is a quadrangular prism structure, which is used to be fixed with the universal joint 12 for anti-rotation sleeve connection.

[0045] The universal joint 12 is used as a driving connection member, one end of which is connected to the horizontal output shaft 111 of the wheel side motor 11, and the other end is connected to the quadrangular prism end of the inner shaft 4. Fig.13 As shown, the end of the universal joint 12 facing the inner shaft 4 has a square inner recess that matches the quadrangular prism of the inner shaft 4, so as to be sleeved and fixed to prevent rotation.

[0046] See also Figure 3 , 10 , 14, the support shaft 8 is a hollow sleeve structure, one end of which is cylindrical and the other end is a special-shaped structure. The cylindrical end of the support shaft 8 faces the inner shaft 4 and is coaxially sleeved on the inner side of the inner shaft 4, that is, the side facing away from the connecting flange 401 of the inner shaft 4. The inner diameter wall of the support shaft 8 is tightly matched with the outer ring of the inner bearing 7. The propeller 13 is coaxially sleeved on the support shaft 8, and the propeller 13 and the support shaft 8 are rotatably connected through the outer bearing 6. Specifically, the outer diameter wall of the cylindrical end of the support shaft 8 is sleeved with the outer bearing 6, and the inner ring of the bearing of the outer bearing 6 is tightly matched with the outer diameter wall of the support shaft 8. The propeller 13 includes a mounting shaft and a plurality of blades uniformly fixed on the outer diameter of the circumference of the mounting shaft. The mounting shaft serves as the mounting portion of the propeller 13, and a mounting hole is provided along its central axis. The inner wall of the mounting hole of the central shaft portion of the propeller 13 is tightly matched with the outer ring of the outer bearing 6. The propeller 13 is located in the inner cavity of the hub 2 as a whole, and is used to provide flight propulsion in flight mode.

[0047] See also Figure 3 , 9 In order to achieve wheel braking, a brake disc 402 is coaxially arranged at one end of the inner shaft 4 close to the connecting flange 401 for mounting the brake caliper assembly 5. Fig. 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 integrated structure. The mounting ring 501 is coaxially mounted on the inner shaft 4, located on the inner side of the brake disc 402 and the outer side of the support shaft 8, and is fixedly connected to the outer end surface of the cylindrical end of the support shaft 8. The first brake caliper 502 is matched with the second brake caliper 503 to clamp the brake disc 402 in the brake slot therebetween, and the brake is braked by friction generated by the brake caliper assembly 5 and the brake disc 402. The brake caliper assembly 5 is controlled by the vehicle control system.

[0048] See also Figure 4 , 6 The power transmission of the propeller 13 is realized through a pair of transmission gear sets, which specifically include a passive gear 14 and a driving gear 15. The driving gear 15 is coaxially fixedly connected to the vertical output shaft 112 of the wheel-side motor 11. The passive gear 14 is sleeved on the outer diameter of the support shaft 8 and is located on the inner side of the propeller 13. The passive gear 14 is rotatably connected to the support shaft 8 through a bearing, and is fixedly connected to the inner end surface of the mounting shaft of the propeller 13. When the passive gear 14 is flipped to the horizontal with the wheel assembly, the driving gear 15 and the passive gear 14 are meshed.

[0049] See also Figure 3 , 4 10. The special-shaped end of the support shaft 8 is provided with an articulation shaft 801 and a first articulation hole 802. The two articulation shafts 801 are arranged horizontally and symmetrically on both sides of the end of the support shaft 8. The axis of the articulation shaft 801 intersects the axis of the support shaft 8 vertically and is used to be articulated with the horizontal end of the mounting frame 10. The first articulation hole 802 of the support shaft 8 is located at the upper edge of the end of the support shaft 8, parallel to the articulation shaft 801, and is used to be articulated with one end of the telescopic vibration reduction mechanism 9 through a pin.

[0050] See also Figure 1-6 , 11-12, the mounting frame 10 is fixed to the frame, and the mounting frame 10 includes a vertical rod 101 and two cross rods 102. The vertical rod 101 is a V-shaped structure, and the V-shaped opening is vertically fixed to the frame downward. The two cross rods 102 are symmetrically arranged and vertically fixed to the bottom end of the V-shaped opening of the vertical rod 101 on the side facing away from the frame. A through hole is provided at the end of the cross rod 102, which is used to cooperate with the hinge shaft 801 of the support shaft 8 for hinge connection. A connecting ear is provided on the same side of the upper end of the vertical rod 101 and the cross rod 102, and the connecting ear is provided with a second hinge hole parallel to the through hole of the cross rod 102, which is used to pass through the pin shaft and hinge with the other end of the telescopic vibration reduction mechanism 9.

[0051] See also Figure 1-6 , Fig.11The telescopic vibration damping mechanism 9 includes a telescopic hydraulic cylinder 901 and a vibration damping spring 902 coaxially mounted on the outside of the hydraulic cylinder 901. The hydraulic cylinder 901 is connected to the hydraulic system and is 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 frame 10. The axis of the telescopic vibration damping mechanism 9 is coplanar with the axis of the support shaft 8. When the telescopic end of the hydraulic cylinder 901 is extended, the support shaft 8 is pushed to make the driven wheel flip to a horizontal state as a whole, so that the power device is switched to a flight mode. When the telescopic end of the hydraulic cylinder 901 is retracted and reset, the support shaft 8 is pulled to make the driven wheel vertical as a whole, so that the power device is switched to a driving mode. At this time, the vibration damping spring 902 is in a contracted state, and the two ends of the hydraulic cylinder 901 are elastically offset, which plays a vibration damping role on the wheel in the driving state.

[0052] See also Figure 1-6 The wheel motor 11 is fixed to the vehicle frame. The wheel motor 11 is a power assembly integrating a drive motor and a reducer, and has two power output shafts, namely a horizontal output shaft 111 and a vertical output shaft 112. The horizontal output shaft 111 is used to provide power to the wheels in the driving mode, and the vertical output shaft 112 is used to provide power to the propeller 13 in the flight mode.

[0053] See also Figure 1 , 3 4. In driving mode, the wheel is in a vertical state as a whole, the tire 1 touches the ground, and the horizontal output shaft 111 of the wheel motor, the universal joint 12, and the inner shaft 4 are coaxial. At this time, the horizontal output shaft 111 of the wheel motor is controlled to output a rotation speed, and the universal joint 12 is driven to rotate through the horizontal output shaft 111 of the wheel motor, thereby driving the inner shaft 4 to rotate, and then driving the wheel hub 2 to rotate to realize wheel rotation. In driving mode, the propeller 13 does not move. The vehicle turns and turns on the spot are completed by controlling the wheel speeds in the four power units.

[0054] See also Figure 2 , 5 6. In flight mode, under the push of the telescopic vibration reduction mechanism 9, the support shaft 8 flips around the mounting frame 10 and the hinge shaft 801 of the support shaft 8, so that the wheel is in a horizontal state as a whole. At this time, the two ends of the universal joint 12 are in a vertical state, the horizontal output shaft 111 of the wheel-side motor does not work, and the driving gear 15 and the passive gear 14 are engaged. By controlling the output speed of the vertical output shaft 112 of the wheel-side motor, the driving gear 15 is driven to rotate, and then the passive gear 14 is driven to rotate, and then the propeller 13 is driven to rotate around the support shaft 8, thereby generating flight propulsion. By controlling the speed of the propeller 13 in the four power units, the vehicle can complete actions such as climbing, cruising, descending, turning, and turning around on the spot.

[0055] The present invention integrates ground driving and air flying modules into one power device, which is switched by changing the working mode of the device. It has a compact structure, diverse functions, and the characteristics of light unsprung mass of the automobile, which is beneficial to automobile control and stability.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A flying car power device based on wheel-side motors, characterized in that: include: The wheel assembly comprises a wheel hub, an inner shaft whose outer end is coaxially connected to the wheel hub and used to drive the wheel hub to rotate, a support shaft coaxially sleeved on the outer diameter of the inner shaft and rotatably connected to the inner shaft, and a propeller coaxially sleeved on the outer diameter of the support shaft and rotatably connected to the support shaft; the propeller is located in the inner cavity of the wheel hub and is used to provide flight propulsion in the flight mode; The power and transmission assembly includes a wheel-side motor with two-way output fixed to the frame, a universal joint connecting the horizontal output shaft of the wheel-side motor and the inner end of the inner shaft, and a gear set connecting the vertical output shaft of the wheel-side motor and the propeller; The wheel vibration reduction and reversing assembly comprises a mounting frame fixed to a vehicle frame and a telescopic vibration reduction mechanism; the outer end of the mounting frame facing the wheel assembly is hinged to the inner end of a support shaft, and the top end of the mounting frame is hinged to one end of the telescopic vibration reduction mechanism; the other end of the telescopic vibration reduction mechanism is hinged to the upper edge of the inner end of the support shaft; the telescopic vibration reduction mechanism is used for switching the wheel assembly between a flight mode and a driving mode, and for vibration reduction in the driving mode.

2. The flying car power device based on wheel-side motors according to claim 1 is characterized in that: In the driving mode, the wheel assembly is in a vertical state as a whole, and the horizontal output shaft of the wheel-side motor, the universal joint, and the inner shaft are coaxial; in the flight mode, the wheel assembly is flipped to a horizontal state around the hinge between the mounting frame and the support shaft under the push of the telescopic vibration reduction mechanism, the horizontal output shaft of the wheel-side motor is perpendicular to the inner shaft, and the two ends of the universal joint are vertical.

3. The flying car power device based on wheel-side motors according to claim 1 is characterized in that: One end of the inner shaft is provided with a connecting flange for fixing with the wheel hub by bolts; the middle part of the inner shaft is a smooth shaft section for installing the inner bearing and the support shaft for rotation connection; the other end of the inner shaft is a prismatic structure for fixing with the universal joint anti-rotation sleeve.

4. The flying car power device based on wheel-side motors according to claim 3 is characterized in that: A brake disc is coaxially arranged at one end of the inner shaft close to the connecting flange for installing a brake caliper assembly.

5. The flying car power device based on wheel-side motors according to claim 3 is characterized in that: The support shaft body is a hollow shaft structure, and the inner diameter wall at one end thereof is tightly matched with the outer ring of the inner bearing. The outer diameter wall of this end is sleeved with an outer bearing, and is rotatably connected to the mounting part of the propeller through the outer bearing; an articulated shaft and a first articulated hole are provided at the other end of the support shaft, and the two articulated shafts are horizontally arranged and symmetrically arranged on both sides of the end of the support shaft. The axis of the articulated shaft intersects the axis of the support shaft vertically and is used for articulation with the mounting frame; the first articulated hole is located at the edge of the end of the support shaft, parallel to the articulated shaft, and is used for articulation with the telescopic vibration damping mechanism through a pin shaft.

6. The flying car power device based on wheel-side motors according to claim 5 is characterized in that: The mounting frame includes a vertical rod and two cross rods; the vertical rod is vertically fixed to the frame; the two cross rods are symmetrically arranged and vertically fixed to the bottom end of the vertical rod on the side facing away from the frame; the end of the cross rod is provided with a through hole for articulating with the hinge shaft of the support shaft; the upper end of the vertical rod is provided with a connecting ear piece, and the connecting ear piece is provided with a second hinge hole parallel to the through hole of the cross rod, which is used to pass the pin shaft and articulate with the telescopic vibration reduction mechanism.

7. The flying car power device based on wheel-side motors according to claim 5 is characterized in that: The propeller comprises a mounting shaft and a plurality of blades evenly distributed and fixed on the outer diameter of the circumference of the mounting shaft; the mounting shaft serves as the mounting part of the propeller, and a mounting hole is provided along its axis, and the inner wall of the mounting hole is tightly matched with the outer ring of the outer bearing.

8. The flying car power device based on wheel-side motors according to claim 7 is characterized in that: The gear set includes a driving gear and a passive gear. The driving gear is coaxially and fixedly connected to the vertical output shaft of the wheel-side motor. The passive gear is sleeved on the outer diameter of the support shaft, rotationally connected to the support shaft, and fixedly connected to the inner end surface of the propeller's mounting shaft. When the passive gear flips to the horizontal along with the wheel assembly, the driving gear and the passive gear are meshed.

9. The flying car power device based on wheel-side motors according to claim 1 is characterized in that: The telescopic vibration damping mechanism includes a telescopic hydraulic cylinder and a vibration damping spring coaxially sleeved on the outside of the hydraulic cylinder; when the hydraulic cylinder is extended, it pushes the wheel assembly to flip to a horizontal state as a whole; when the hydraulic cylinder is retracted and reset, the wheel assembly is in a vertical state as a whole. At this time, the vibration damping spring and the two ends of the hydraulic cylinder elastically offset each other, thereby playing a vibration damping role on the wheel assembly when driving.

Images