A foldable dual-mode transformation vehicle

Abstract

The present invention discloses a foldable dual-form transformation vehicle, which relates to the technical field of vehicle engineering. It includes a vehicle frame, a front wheel mechanism rotatably connected to the front end of the vehicle frame, a rear wheel mechanism connected to the rear end of the vehicle frame, and a form transformation mechanism arranged on the vehicle frame and used to drive the front wheel mechanism to flip and swing back and forth relative to the vehicle frame. The front wheel mechanism includes a front wheel and a telescopic assembly. The axial length of the telescopic assembly is adjustable, and one axial end of the telescopic assembly is rotatably connected to the front end of the vehicle frame, and the other end of the telescopic assembly is connected to the front wheel. Through the flipping drive of the front wheel mechanism by the form transformation mechanism and the position adjustment of the front wheel by the telescopic assembly, the position of the front wheel on the vehicle frame can be conveniently adjusted, so that the front wheel can swing to the rear of the vehicle frame, realizing the folding of the electric motorcycle's body, enabling the electric motorcycle to switch between the conventional form and the scooter form, which is beneficial for storage and parking and travel in narrow and congested sections.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and particularly relates to a folding dual-mode transformation vehicle. Background Art

[0002] In the field of automotive industry technology, various vehicles have been widely used, such as family cars, commercial vehicles, engineering vehicles, special vehicles, motorcycles, electric vehicles, and balance bikes, etc.

[0003] Currently, for short-distance daily travel, electric motorcycles are more portable than traditional motor motorcycles and are safer during driving; at the same time, electric motorcycles are more labor-saving and faster than bicycles. In some areas, electric motorcycles have become the first choice for travel.

[0004] However, for electric motorcycles in the prior art, their shapes are still larger compared to bicycles, balance bikes, etc., and the volume gap with traditional motor motorcycles is not obvious. When traveling on narrow or congested roads, they still face the problem of difficult rapid passage. At the same time, since there are usually no dedicated parking spaces reserved for electric motorcycles in society, and the shapes of electric motorcycles are fixed and cannot be folded and stored, it is difficult to park electric motorcycles indoors, and they can only be parked randomly on the roadside or sidewalk, which may lead to security risks such as theft and affecting public transportation.

[0005] Therefore, how to achieve the folding of the shape of an electric motorcycle, which is beneficial for storage and parking and travel on narrow and congested roads, is a technical problem faced by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a folding dual-mode transformation vehicle, which can achieve the folding of the shape of an electric motorcycle, enabling the electric motorcycle to switch between a conventional mode and a balance bike mode, and being beneficial for storage and parking and travel on narrow and congested roads.

[0007] To solve the above technical problems, the present invention provides a folding dual-mode transformation vehicle, including a frame, a front wheel mechanism rotatably connected to the front end of the frame, a rear wheel mechanism connected to the rear end of the frame, and a mode transformation mechanism disposed on the frame for driving the front wheel mechanism to rotate and swing back and forth relative to the frame;

[0008] The front wheel mechanism includes a front wheel and a telescopic assembly, the axial length of the telescopic assembly is adjustable, and one axial end of the telescopic assembly is rotatably connected to the front end of the frame, and the other end of the telescopic assembly is connected to the front wheel.

[0009] Preferably, the telescopic assembly includes an outer sleeve, an inner sleeve slidably inserted into the outer sleeve, a first driving motor installed in the outer sleeve, and a driving screw power-connected to the output shaft of the first driving motor. The driving screw is inserted into the inner sleeve and threadedly connected thereto, so as to drive the inner sleeve to perform axial movement through screw drive when rotating;

[0010] The top end of the outer sleeve is rotatably connected to the front end of the vehicle frame, and the bottom end of the inner sleeve is connected to the front wheel.

[0011] Preferably, a plurality of axially extending guide grooves are formed on the inner wall of the outer sleeve, and a plurality of axially extending guide ribs for cooperating with the guide grooves are protruded on the outer wall of the inner sleeve.

[0012] Preferably, a connecting seat is provided on the outer wall of the outer sleeve;

[0013] The shape transformation mechanism includes a driving cylinder installed at the rear end of the vehicle frame, a first transmission link connected to the piston rod of the driving cylinder, a flipping seat rotatably connected to the vehicle frame, and a second transmission link with one end rotatably connected to the connecting seat and the other end rotatably connected to the flipping seat. The end of the first transmission link is rotatably connected to the flipping seat.

[0014] Preferably, the first transmission link is an arc-shaped rod; the end of the flipping seat is rotatably sleeved on a pin shaft on the vehicle frame; the end of the second transmission link is connected to the connecting seat through a constant velocity joint.

[0015] Preferably, the rear wheel mechanism includes a rear mounting seat connected to the rear end of the vehicle frame, at least two rear wheels respectively connected to both sides in the width direction of the rear mounting seat, and a preset gap is provided between the two rear wheels on both sides, so that when the shape transformation mechanism drives the front wheel to swing backward to a preset angular position, the front wheel is located between the two rear wheels on both sides and is coaxial with each rear wheel.

[0016] Preferably, the rear wheel mechanism further includes a guide seat provided on the surface of the rear mounting seat, a rack provided in the guide seat and extending along the length direction of the vehicle frame, a second driving motor slidably provided in the guide seat, a gear power-connected to the output shaft of the second driving motor, and a driving slider slidably provided on the rear mounting seat. The rack meshes with the gear, the driving slider is connected to the second driving motor, and both sides of the driving slider are respectively connected to the corresponding rear wheel through driving links.

[0017] Preferably, both sides of the rear mounting seat in the width direction are provided with L-shaped sliding holes, the driving slider is slidably arranged in the inner cavity of the rear mounting seat, the driving connecting rod is rotatably connected with the driving slider, the outer end of the driving connecting rod is inserted into the L-shaped sliding hole, and the outer end of the driving connecting rod is connected to a guide column matched with the L-shaped sliding hole;

[0018] A first electromagnet is provided on both sides of the front wheel, and a second electromagnet is provided on the inner side of the rear wheels on both sides, so as to pull the rear wheels on both sides closer through the magnetic attraction between the second electromagnets on both sides, or to pull the front wheel and the rear wheel closer through the magnetic attraction between the first electromagnet and the second electromagnet.

[0019] Preferably, the bottom of the guide column is connected to a support column, the bottom of the support column is connected to a rear support frame, the rear wheel is mounted on the outer side of the rear support frame, and the second electromagnet is mounted on the inner side of the rear support frame.

[0020] Preferably, the frame includes a front frame body, an intermediate frame body and a rear frame body, the front wheel mechanism is connected to the front frame body, the rear wheel mechanism is connected to the rear frame body, and the shape transformation mechanism is arranged on the intermediate frame body; it also includes a front end rotatably arranged on the front frame body, and the bottom end of the front end is connected to the front wheel mechanism to control the front wheel mechanism to turn.

[0021] The foldable dual-form transformation vehicle provided by the present invention mainly includes a frame, a front wheel mechanism, a rear wheel mechanism and a form transformation mechanism. Among them, the frame is the main structure of the vehicle, which is mainly used to install and accommodate other accessories, and is also used to carry users for riding. The front wheel mechanism is arranged at the front end of the frame and forms a flip connection with the front end of the frame, so that the front wheel mechanism can flip relative to the front end of the frame, and its flipping movement is located in the vertical plane where the frame is located. Overall, it can swing forward and backward relative to the frame, so as to swing to the rear end of the frame where the rear wheel mechanism is located. The rear wheel mechanism is arranged at the rear end of the frame, and cooperates with the front wheel mechanism to achieve stable support and stable driving of the frame. The form transformation mechanism is arranged on the frame, specifically a driving mechanism, whose output end is connected to the front wheel mechanism, and is mainly used to drive the front wheel mechanism to flip in a specific direction, so as to realize the front wheel mechanism swinging forward and backward relative to the frame, thereby realizing the folding and form transformation of the vehicle. At the same time, the front wheel mechanism is specifically a split structure, mainly including a front wheel and a telescopic component. The axial length of the telescopic assembly is adjustable, and one axial end (usually the top end) of the telescopic assembly is rotatably connected to the front end of the frame to smoothly realize the steering movement of the front wheel, while the other axial end (usually the bottom end) of the telescopic assembly is connected to the front wheel. When the telescopic assembly is extended and retracted, the distance between the front wheel and the front end of the frame can be adjusted.

[0022] Thus, for the foldable dual-mode transformation vehicle provided by the present invention, through the flipping drive of the front wheel mechanism by the mode transformation mechanism and the position adjustment of the front wheel by the telescopic assembly, the position of the front wheel on the vehicle frame can be conveniently adjusted, enabling the front wheel to swing to the rear of the vehicle frame and be in the same area as the rear wheel mechanism or even parallel to the rear wheel mechanism in the balance bike mode, realizing the folding of the electric motorcycle's form and enabling the electric motorcycle to switch between the conventional mode and the balance bike mode, which is beneficial for storage and parking and travel on narrow and congested roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings according to the provided drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the vehicle in the conventional mode in a specific embodiment provided by the present invention.

[0025] Figure 2 It is a schematic structural diagram of the vehicle in the folded mode in a specific embodiment provided by the present invention.

[0026] Figure 3 It is Figure 1 a schematic structural diagram of the vehicle shown in [FIGURE NUMBER] without the vehicle shell.

[0027] Figure 4 It is Figure 2 a schematic structural diagram of the vehicle shown in [FIGURE NUMBER] without the vehicle shell.

[0028] Figure 5 It is an exploded view of the specific structure of the telescopic assembly.

[0029] Figure 6 It is a longitudinal sectional view of the specific structure of the outer sleeve.

[0030] Figure 7 It is an exploded view of the intermediate partial structure of the mode transformation mechanism.

[0031] Figure 8 It is an exploded view of the rear-end partial structure of the mode transformation mechanism.

[0032] Figure 9 It is an exploded view of the front-end partial structure of the mode transformation mechanism.

[0033] Figure 10 It is a schematic structural diagram of the specific structure of the rear wheel mechanism.

[0034] Figure 11 It is an exploded view of the partial structure of the rear wheel mechanism.

[0035] Figure 12 It is a schematic diagram of the specific structures of the first electromagnet and the second electromagnet.

[0036] Figure 13 It is a schematic diagram of the specific structure of the rear support frame.

[0037] Figure 14 It is a schematic diagram of the specific structure of the vehicle frame.

[0038] Among them, Figure 1 — Figure 14 In:

[0039] Vehicle frame - 1, front wheel mechanism - 2, rear wheel mechanism - 3, shape transformation mechanism - 4, vehicle head - 5, controller - 6, battery - 7, fuel tank - 8, solenoid valve - 9, wheel side speed controller - 10, brake - 11, shock absorber - 12;

[0040] Front frame body - 101, middle frame body - 102, rear frame body - 103;

[0041] Front wheel - 21, telescopic assembly - 22, first electromagnet - 23, front support frame - 24;

[0042] Outer sleeve - 221, inner sleeve - 222, first driving motor - 223, driving screw - 224, guide groove - 225, guide rib - 226, connecting seat - 227;

[0043] First installation cavity - 2211, second installation cavity - 2212;

[0044] Rear mounting seat - 31, rear wheel - 32, guide seat - 33, rack - 34, second driving motor - 35, gear - 36, driving slider - 37, driving connecting rod - 38, L-shaped sliding hole - 39, guide post - 310, second electromagnet - 311, support column - 312, rear support frame - 313;

[0045] Driving cylinder - 41, piston rod - 42, first transmission connecting rod - 43, flipping seat - 44, second transmission connecting rod - 45, pin shaft - 46, constant velocity joint - 47;

[0046] First connection hole - 441, second connection hole - 442, third connection hole - 443. Specific implementation manner

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 , Figure 1 which is a schematic diagram of the overall structure of a specific embodiment provided by the present invention, Figure 2 which is a schematic diagram of the structure of the vehicle in a folded state in a specific embodiment provided by the present invention, Figure 3 is Figure 1 a schematic diagram of the structure of the vehicle shown in Figure 4 is Figure 2 a schematic diagram of the structure of the vehicle shown in

[0049] In a specific embodiment provided by the present invention, the foldable dual-mode transformation vehicle mainly includes a frame 1, a front wheel mechanism 2, a rear wheel mechanism 3, and a mode transformation mechanism 4.

[0050] Among them, the frame 1 is the main structure of the vehicle, mainly used for installing and accommodating the remaining accessories, and also for carrying the user for the user to ride.

[0051] The front wheel mechanism 2 is arranged at the front end of the frame 1 and is flip-connected to the front end of the frame 1, so that the front wheel mechanism 2 can perform a flip movement relative to the front end of the frame 1. Its flip movement is within the vertical plane where the frame 1 is located. Overall, it can swing back and forth relative to the frame 1 and thus swing to the rear end position of the frame 1 where the rear wheel mechanism 3 is located.

[0052] The rear wheel mechanism 3 is arranged at the rear end of the frame 1 and cooperates with the front wheel mechanism 2 to jointly achieve stable support and stable driving of the frame 1.

[0053] The mode transformation mechanism 4 is arranged on the frame 1 and is specifically a driving mechanism. Its output end is connected to the front wheel mechanism 2 and is mainly used to drive the front wheel mechanism 2 to perform a flip movement in a specific direction, so as to realize the back-and-forth swing movement of the front wheel mechanism 2 relative to the frame 1, and further realize the folding and mode transformation of the vehicle.

[0054] Meanwhile, the front wheel mechanism 2 is specifically a split structure, mainly including a front wheel 21 and a telescopic assembly 22. Among them, the axial length of the telescopic assembly 22 is adjustable, and one axial end (usually the top end) of the telescopic assembly 22 is rotatably connected to the front end of the vehicle frame 1 to smoothly achieve the steering movement of the front wheel 21, while the other axial end (usually the bottom end) of the telescopic assembly 22 is connected to the front wheel 21. When the telescopic assembly 22 expands and contracts, the distance between the front wheel 21 and the front end of the vehicle frame 1 can be adjusted.

[0055] In this way, for the foldable dual-mode transformation vehicle provided in this embodiment, through the flipping driving effect of the form transformation mechanism 4 on the front wheel mechanism 2 and the position adjustment effect of the telescopic assembly 22 on the front wheel 21, the position of the front wheel 21 on the vehicle frame 1 can be conveniently adjusted, so that the front wheel 21 can swing to the rear of the vehicle frame 1, be in the same area as the rear wheel mechanism 3 or even be parallel to the rear wheel mechanism 3 in the balance bike form, realizing the physical folding of the electric motorcycle, enabling the electric motorcycle to switch between the conventional form and the balance bike form, which is beneficial for storage and parking and travel on narrow and congested roads.

[0056] In addition, for the foldable dual-mode transformation vehicle provided in this embodiment, when the form is transformed, the center of gravity of the vehicle is always located in the middle area to the upper-middle area, which is convenient for the user to master and reduces the risk of accidents caused by driving imbalance. At the same time, in this embodiment, lightweight design is realized by opening weight-reducing holes, weight-reducing grooves and other structures at specific positions on components such as the vehicle frame 1, the front wheel mechanism 2, and the rear wheel mechanism 3, making the driving state of the vehicle easier for the user to control and improving safety.

[0057] As Figure 5 shown, Figure 5 is an exploded view of the specific structure of the telescopic assembly 22.

[0058] In an alternative embodiment of the telescopic assembly 22, the telescopic assembly 22 mainly includes an outer sleeve 221, an inner sleeve 222, a first drive motor 223 and a drive screw 224.

[0059] Among them, the top end of the outer sleeve 221 is rotatably connected to the front end of the vehicle frame 1. Since the front end of the vehicle frame 1 is usually provided with a vehicle head 5, the top end of the outer sleeve 221 is specifically rotatably connected to the vehicle head 5; at the same time, the bottom end of the outer sleeve 221 is usually suspended. Generally, two cavities are opened in the outer sleeve 221, namely a first installation cavity 2211 and a second installation cavity 2212. Among them, the first installation cavity 2211 is located in the top area of the outer sleeve 221 and is mainly used for installing the first drive motor 223; the second installation cavity 2212 is located in the middle and lower area of the outer sleeve 221 and is mainly used for installing the inner sleeve 222.

[0060] The inner sleeve 222 is inserted into the outer sleeve 221, usually inserted from the bottom opening of the outer sleeve 221, and can perform axial sliding movement within the outer sleeve 221 to achieve telescopic movement relative to the bottom opening of the outer sleeve 221, so as to extend or shorten the axial length of the telescopic assembly 22. The bottom end of the inner sleeve 222 is connected to the front wheel 21. Generally, a front support frame 24 is provided on the front wheel 21 to install the rotating shaft of the front wheel 21 through the front support frame 24, and the bottom end of the inner sleeve 222 is specifically connected to the front support frame 24, thereby driving the front support frame 24 to perform synchronous axial telescopic movement, and further realizing the adjustment of the axial position of the front wheel 21 or the adjustment of the radial distance relative to the vehicle head 5.

[0061] The first drive motor 223 is installed within the outer sleeve 221, and the drive screw 224 is in power connection with the output shaft of the first drive motor 223 to drive the drive screw 224 to rotate synchronously through the first drive motor 223. At the same time, internal threads are provided on the inner wall of the inner sleeve 222, and the rod portion of the drive screw 224 is inserted into the inner sleeve 222 and forms a threaded connection therewith. With such a setting, when the first drive motor 223 drives the drive screw 224 to rotate, the drive screw 224 will form a threaded drive (or lead screw drive) with the inner sleeve 222, thereby converting the rotational movement of the drive screw 224 into the axial linear movement of the inner sleeve 222, and further realizing the telescopic effect of the front wheel 21. Of course, the working state of the first drive motor 223 can be controlled by the user himself, so that the user can control the axial movement state of the inner sleeve 222 according to his actual needs, and further accurately control the telescopic distance and position of the front wheel 21.

[0062] As Figure 6 shown, Figure 6 is a longitudinal sectional view of the specific structure of the outer sleeve 221.

[0063] Furthermore, in this embodiment, a plurality of guide grooves 225 are opened on the inner wall of the outer sleeve 221, and a plurality of guide ribs 226 are protruded on the outer wall of the inner sleeve 222. Each guide groove 225 and each guide rib 226 extend a certain length along the axial direction of the outer sleeve 221 or the inner sleeve 222, and each guide groove 225 and each guide rib 226 correspond to each other and form a sliding fit. With such a setting, when the first drive motor 223 drives the drive screw 224 to rotate, the inner sleeve 222 will perform axial linear movement within the outer sleeve 221, and the movement will be guided through the cooperation of the guide groove 225 and the guide rib 226, preventing the inner sleeve 222 from having movement deviation and improving the movement stability.

[0064] Of course, to prevent the inner sleeve 222 from accidentally detaching or falling off from the bottom opening of the outer sleeve 221, the bottoms of the guiding grooves 225 formed on the inner wall of the outer sleeve 221 are sealed. In this way, it can be ensured that the guiding ribs 226 on the inner sleeve 222 are always within the guiding grooves 225 and will not fall off. At the same time, through the design of the sealed position at the bottom of the guiding grooves 225, the maximum extending distance of the inner sleeve 222 can also be restricted.

[0065] In addition, to facilitate the connection between the front wheel mechanism 2 and the form transformation mechanism 4, a connection seat 227 is provided on the outer wall of the outer sleeve 221 in this embodiment, so as to be connected to the form transformation mechanism 4 through the connection seat 227 and achieve power transmission.

[0066] As Figure 7 、 Figure 8 、 Figure 9 shown, Figure 7 is an exploded view of the intermediate partial structure of the form transformation mechanism 4, Figure 8 is an exploded view of the rear-end partial structure of the form transformation mechanism 4, Figure 9 is an exploded view of the front-end partial structure of the form transformation mechanism 4.

[0067] In an alternative embodiment of the form transformation mechanism 4, the form transformation mechanism 4 mainly includes a drive cylinder 41, a first transmission link 43, a flipping seat 44 and a second transmission link 45.

[0068] Among them, the drive cylinder 41 is installed at the rear end position of the vehicle frame 1. Generally, a hydraulic cylinder can be used. Of course, a pneumatic cylinder, an electric cylinder, etc. can also be used. The output end of the drive cylinder 41 is a piston rod 42 that is telescopically arranged in the cylinder body. The telescopic direction of the piston rod 42 is generally the horizontal longitudinal direction or the length direction of the vehicle frame 1, that is, it can telescopically move forward and backward relative to the vehicle frame 1.

[0069] The first transmission link 43, the flipping seat 44 and the second transmission link 45 are generally not directly installed on the rear end of the vehicle frame 1, but are connected front and back through the flipping seat 44 - the front is connected to the connection seat 227 in the front wheel mechanism 2 through the second transmission link 45, and the rear is connected to the end (front end) of the aforementioned piston rod 42 through the first transmission link 43; and the flipping seat 44 is specifically connected to the vehicle frame 1 through rotating components such as a pin shaft 46, generally located at the bottom of the intermediate frame body 102 of the vehicle frame 1, so as to achieve a rotational connection with the vehicle frame 1, enabling the flipping seat 44 to perform a flipping motion within the vertical plane relative to the vehicle frame 1.

[0070] To facilitate the connection between the flipping seat 44, the first transmission link 43, and the second transmission link 45, three through holes are simultaneously formed on the seat body of the flipping seat 44 in this embodiment, namely the first connection hole 441, the second connection hole 442, and the third connection hole 443. Among them, the first connection hole 441 is located in the rear end area of the seat body of the flipping seat 44, mainly used for cooperating with the pin shaft 46 to achieve the rotational connection between the flipping seat 44 and the vehicle frame 1. The second connection hole 442 is located in the middle area of the seat body of the flipping seat 44, mainly used for forming a rotational connection with one end (front end) of the first transmission link 43, and the other end (rear end) of the first transmission link 43 forms a rotational connection with the end (front end) of the piston rod 42. The third connection hole 443 is located in the front end area of the seat body of the flipping seat 44, mainly used for forming a rotational connection with one end (rear end) of the second transmission link 45, and the other end (front end) of the second transmission link 45 forms a rotational connection with the connection seat 227 in the front wheel mechanism 2.

[0071] In this way, when the vehicle is in the normal form, only need to start the drive cylinder 41 to gradually retract the piston rod 42, then the flipping seat 44 can be driven by the first transmission link 43 to perform a clockwise flipping motion, and further drive the connection seat 227 and the entire front wheel mechanism 2 to perform a counterclockwise flipping motion through the second transmission link 45, achieving the backward swinging effect and realizing the conversion of the vehicle from the normal form to the folded form or even the balance bike form; conversely, when the vehicle is in the folded form, only need to start the drive cylinder 41 to gradually extend the piston rod 42 to switch to the normal form.

[0072] In an alternative embodiment regarding the first transmission link 43, the first transmission link 43 is specifically an upwardly convex arc-shaped rod. With such a setting, compared with a straight rod, on the one hand, the bending structural characteristics of the arc-shaped rod can effectively reduce the rotation angle of the latter part of the form transformation mechanism 4, and at the same time reduce the stroke of the piston rod 42 to a certain extent, realizing the stable swinging of the front wheel mechanism 2; on the other hand, considering that the rotation center of the flipping seat 44, that is, the height position of the pin shaft 46 on the vehicle frame 1, is not much different from the height position of the piston rod 42, the arc-shaped rod is connected to the flipping seat 44 along the inclined direction from top to bottom, which can improve the form of the flipping moment formed by the first transmission link 43 on the flipping seat 44, and the transmission efficiency is more efficient.

[0073] In an alternative embodiment of the second transmission link 45, considering that the front wheel mechanism 2 is connected to the vehicle head 5 and the steering movement freedom needs to be maintained, to prevent movement interference between the connecting seat 227 in the front wheel mechanism 2 and the second transmission link 45 during the steering movement, in this embodiment, the front end of the second transmission link 45 is specifically connected to the connecting seat 227 through a constant velocity joint 47. The constant velocity joint 47 is a special coupling that can achieve variable-angle power transmission and change the direction of the transmission axis. Its outer shell is internally ball-jointed with the star-shaped sleeve at the front end of the second transmission link 45 through a spline cage, and at the same time, the front end of its outer shell is rotatably connected to the connecting seat 227 in a specific direction, ensuring that the connecting seat 227 does not affect the rotational movement of the second transmission link 45 and the flipping movement of the flipping seat 44 when it rotates with the outer sleeve 221. Of course, usually only when the front wheel 21 is in the straight-ahead position, that is, when there is no steering angle, the form-changing mechanism 4 can smoothly drive the front wheel mechanism 2 to swing.

[0074] As Figure 10 shown, Figure 10 FIG. shows a schematic structural diagram of the rear wheel mechanism 3.

[0075] In an alternative embodiment of the rear wheel mechanism 3, the rear wheel mechanism 3 mainly includes a rear mounting seat 31 and rear wheels 32. Among them, the rear mounting seat 31 is connected to the rear end of the vehicle frame 1 and is usually in the shape of a rectangular thin plate, mainly used to mount the remaining components of the rear wheel mechanism 3 and also to support the rear end of the vehicle frame 1. The rear wheels 32 are arranged on the rear mounting seat 31, with at least two, and each rear wheel 32 is respectively connected to both sides in the width direction of the rear mounting seat 31, and are located on the left and right sides of the rear end of the vehicle frame 1 as a whole, jointly supporting the rear mounting seat 31 and the rear end of the vehicle frame 1.

[0076] For the convenience of description, the following content of this embodiment will be discussed taking the case where there are 2 rear wheels 32 as an example, but those skilled in the art should clearly understand that this does not constitute a limitation on the number of rear wheels 32. The remaining even numbers of rear wheels 32, such as 4, 6, etc., are obviously also feasible, and even an odd number of rear wheels 32 can also be considered.

[0077] A preset gap is maintained between the two rear wheels 32: In the normal state, the gap between the two rear wheels 32 is the smallest, which is beneficial to high-speed driving; in the folded state, the front wheel 21 swings to the rear area of the vehicle body and is in the same area as the two rear wheels 32. At this time, the form is similar to the normal form (front and rear wheel motorcycle), but the volume is significantly reduced; when the form transformation mechanism 4 continues to drive the front wheel 21 to swing backward in the folded state until it reaches the preset angular position, at this time, the gap between the two rear wheels 32 is the largest, and the front wheel 21 is exactly located in the gap between the two rear wheels 32 and is coaxial with the two rear wheels 32, that is, on the same axis, entering the balance bike form (unicycle form) of a single-row tricycle, reaching the maximum folding state, and improving stability at the same time. Of course, considering the different installation positions of the front wheel 21 and the rear wheels 32 on the frame 1, in order to make the front wheel 21 and the two rear wheels 32 coaxial, when the form transformation mechanism 4 swings the front wheel 21 to the preset angular position, it is also necessary to simultaneously adjust the front and rear positions of the front wheel 21 and the two rear wheels 32 on the frame 1 by extending the telescopic component 22 outward and moving the two rear wheels 32 forward on the rear mounting seat 31 to ensure that the three are coaxial.

[0078] As Figure 11 shown, Figure 11 Figure 7 is an exploded view of a partial structure of the rear wheel mechanism 3.

[0079] To facilitate the forward and backward movement of the two rear wheels 32 on the rear mounting seat 31, a guide seat 33, a rack 34, a second drive motor 35, a gear 36, a drive slider 37, and a drive link 38 are added to the rear wheel mechanism 3 in this embodiment.

[0080] Among them, the guide seat 33 is arranged on the surface of the rear mounting seat 31, usually in a long rectangular shape, and has a slide rail inside, and the slide rail extends along the length direction of the frame 1 (i.e., the front and rear direction). The rack 34 is arranged in the guide seat 33 and is arranged along the extension direction of the slide rail. The second drive motor 35 is installed in the guide seat 33, and the motor housing forms a sliding fit with the slide rail in the guide seat 33 and can slide linearly along the slide rail; at the same time, the output shaft of the second drive motor 35 extends vertically downward and is inserted into the inner cavity of the rear mounting seat 31 - usually a long slideway is opened on the surface of the rear mounting seat 31 for the output shaft of the second drive motor 35 to pass through. The gear 36 is sleeved on the output shaft of the second drive motor 35 and can rotate synchronously with it. Specifically, it is located in the guide seat 33 and meshes with the rack 34, that is, a gear-rack transmission mechanism is formed.

[0081] The driving slider 37 is arranged in the inner cavity of the rear mounting seat 31 and can slide in the inner cavity of the rear mounting seat 31. Its sliding direction is parallel to the extending direction of the aforementioned long slideway, that is, the extending direction of the rack 34. A through hole is provided on the top end face of the driving slider 37 to install the output shaft of the second driving motor 35 through a bearing, realizing the connection and power transmission between the second driving motor 35 and the driving slider 37, and at the same time not affecting the rotational movement of the output shaft of the second driving motor 35. There are two driving connecting rods 38, which are respectively connected to both sides of the driving slider 37, and the outer ends of the two driving connecting rods 38 are respectively connected to the two rear wheels 32.

[0082] With such a setting, when the second driving motor 35 is started, its output shaft rotates and drives the gear 36 to rotate synchronously. Through the meshing transmission between the gear 36 and the rack 34, the second driving motor 35 itself moves linearly along the rack 34 in the guiding seat 33, and drives the lower driving slider 37 to slide synchronously in the rear mounting seat 31. Then, the two rear wheels 32 are respectively driven by the two driving connecting rods 38 to move linearly synchronously, realizing the forward and backward movement and position adjustment of the two rear wheels 32 on the rear mounting seat 31.

[0083] Furthermore, to improve the motion stability and accuracy of the two rear wheels 32 during forward and backward movement, L-shaped sliding holes 39 are provided in the regions on both sides in the width direction of the rear mounting seat 31 in this embodiment. At the same time, the outer ends of the two driving connecting rods 38 respectively extend outward in the width direction and penetrate into the L-shaped sliding holes 39, and guiding columns 310 are provided at the positions of the outer ends of the two driving connecting rods 38. The guiding column 310 can form a sliding fit with the L-shaped sliding hole 39, that is, reciprocally slide along the L-shaped sliding hole 39, and the bottom of the guiding column 310 is connected to the rear wheel 32. With such a setting, through the sliding of the guiding column 310 in the L-shaped sliding hole 39, a motion guiding effect can be formed on the forward and backward movement of the rear wheel 32.

[0084] Obviously, the L-shaped sliding hole 39 includes two parts of sliding holes. One part is the longitudinal sliding hole extending along the length direction of the rear mounting seat 31, and this part of the longitudinal sliding hole forms a sliding fit with the aforementioned guide post 310. As described above, it can form a guiding effect on the front-back movement of the rear wheel 32. The other part is the arc-shaped sliding hole connected to the rear end of the longitudinal sliding hole and extending inwardly and curvedly. Moreover, the arc-shaped sliding holes in the two L-shaped sliding holes 39 face each other and are close to each other (but not connected). This part of the arc-shaped sliding hole also forms a sliding fit with the aforementioned guide post 310, and its function is to adjust the gap between the two rear wheels 32. At this time, both driving link rods 38 are horizontally rotatably connected to the driving slider 37. When the driving slider 37 slides backward to the limit position in the rear mounting seat 31, through the horizontal rotation of the two driving link rods 38 relative to the driving slider 37, it is ensured that the guide post 310 can continue to slide along the arc-shaped sliding hole part of the L-shaped sliding hole 39, thereby realizing the adjustment of the gap between the two rear wheels 32.

[0085] As Figure 12 shown, Figure 12 FIG. is a specific structural schematic diagram of the first electromagnet 23 and the second electromagnet 311.

[0086] Furthermore, in order to automatically adjust the gap between the two rear wheels 32, in this embodiment, second electromagnets 311 are arranged at the inner sides of the two rear wheels 32, and at the same time, first electromagnets 23 are arranged at both sides of the front wheel 21. Among them, the energization states of the first electromagnet 23 and the second electromagnet 311 are both controllable.

[0087] With such an arrangement, when the vehicle is in a normal state, both second electromagnets 311 are energized. Through the magnetic attraction force formed between the two second electromagnets 311, the two rear wheels 32 are pulled closer to each other. At the same time, the guide post 310 slides in the arc-shaped sliding hole of the L-shaped sliding hole 39, and the driving link rod 38 rotates relative to the driving slider 37, thereby making the gap between the two rear wheels 32 smaller, which is beneficial for high-speed driving. When the vehicle is in a folded state, a magnetic repulsive force is formed between the two second electromagnets 311 by changing the current parameters, so that the two rear wheels 32 move away from each other to increase the gap and ensure that the front wheel 21 can swing smoothly into the gap between the two rear wheels 32. When the vehicle is in a scooter state, both the two first electromagnets 23 and the two second electromagnets 311 are energized. At this time, magnetic attraction forces are formed between the two pairs of first electromagnets 23 and second electromagnets 311, thereby tightly pulling the front wheel 21 and the two rear wheels 32 together, which is more beneficial for the vehicle to pass in the scooter state.

[0088] As Figure 13 shown, Figure 13 FIG. is a specific structural schematic diagram of the rear support frame 313.

[0089] To facilitate the connection between the guide post 310 and the rear wheel 32, a support post 312 and a rear support frame 313 are added to the rear wheel mechanism 3 in this embodiment. Among them, the rear support frame 313 is mainly used to install the rear wheel 32, and its shape and function are similar to those of the front support frame 24, which will not be elaborated here. The support post 312 is arranged on the top surface of the rear support frame 313 and is mainly used to connect with the bottom of the guide post 310, so as to realize the connection between the guide post 310 and the rear wheel 32. Correspondingly, the rear wheel 32 is specifically installed at the outer side position of the rear support frame 313, and the second electromagnet 311 is specifically installed at the inner side position of the rear support frame 313.

[0090] As Figure 14 shown, Figure 14 Figure 1 is a schematic structural diagram of the vehicle frame 1.

[0091] In an alternative embodiment of the vehicle frame 1, the vehicle frame 1 mainly includes a front frame body 101, an intermediate frame body 102 and a rear frame body 103. Among them, the front frame body 101 is located in the front end area of the vehicle frame 1 and is mainly used to install components such as the vehicle head 5, and is also connected to the front wheel mechanism 2 through the vehicle head 5. The intermediate frame body 102 is located in the middle area of the vehicle frame 1 and is mainly used to install the shape transformation mechanism 4, as well as accessories such as the controller 6 and the battery 7 to realize vehicle control and power supply respectively. The rear frame body 103 is located in the rear end area of the vehicle frame 1 and is mainly used to install the rear wheel mechanism 3, and is also used to install accessories such as the fuel tank 8 and the solenoid valve 9 to provide pressure oil and oil circuit control for the drive cylinder 41 in the shape transformation mechanism 4.

[0092] In addition, conventional accessories such as wheel side speed controllers 10, brakes 11 and shock absorbers 12 are also configured on the front wheels 21 and the rear wheels 32 respectively to realize functions such as speed control, differential steering, braking and shock absorption.

[0093] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foldable dual-mode transformation vehicle, characterized in that It includes a frame (1), a front wheel mechanism (2) rotatably connected to the front end of the frame (1), a rear wheel mechanism (3) connected to the rear end of the frame (1), and a form transformation mechanism (4) provided on the frame (1) for driving the front wheel mechanism (2) to flip and swing back and forth relative to the frame (1); The front wheel mechanism (2) includes a front wheel (21) and a telescopic assembly (22). The axial length of the telescopic assembly (22) is adjustable, and one axial end of the telescopic assembly (22) is rotatably connected to the front end of the frame (1), and the other end of the telescopic assembly (22) is connected to the front wheel (21); The telescopic assembly (22) includes an outer sleeve (221), and a connecting seat (227) is provided on the outer wall of the outer sleeve (221); The form transformation mechanism (4) includes a driving cylinder (41) installed at the rear end of the frame (1), a first transmission link (43) connected to the piston rod (42) of the driving cylinder (41), a flipping seat (44) rotatably connected to the frame (1), and a second transmission link (45) with one end rotatably connected to the connecting seat (227) and the other end rotatably connected to the flipping seat (44). The end of the first transmission link (43) is rotatably connected to the flipping seat (44); The first transmission link (43) is an arc-shaped rod; the end of the flipping seat (44) is rotatably sleeved on a pin shaft (46) on the frame (1); the end of the second transmission link (45) is connected to the connecting seat (227) through a constant velocity joint (47).

2. The foldable dual-mode transformation vehicle according to claim 1, wherein The telescopic assembly (22) further includes: an inner sleeve (222) slidably inserted into the outer sleeve (221), a first driving motor (223) installed in the outer sleeve (221), and a driving screw rod (224) power-connected to the output shaft of the first driving motor (223). The driving screw rod (224) is inserted into the inner sleeve (222) and forms a threaded connection therewith to drive the inner sleeve (222) to perform axial movement through threaded transmission when rotating; The top end of the outer sleeve (221) is rotatably connected to the front end of the frame (1), and the bottom end of the inner sleeve (222) is connected to the front wheel (21).

3. The foldable dual-mode transformation vehicle according to claim 2, wherein, A plurality of axially extending guide grooves (225) are provided on the inner wall of the outer sleeve (221), and a plurality of axially extending guide ribs (226) for cooperating with the guide grooves (225) are protruded on the outer wall of the inner sleeve (222).

4. The foldable dual-mode transformation vehicle according to any one of claims 1-3, characterized in that, The rear wheel mechanism (3) includes a rear mounting seat (31) connected to the rear end of the frame (1), and at least two rear wheels (32) respectively connected to both sides in the width direction of the rear mounting seat (31). A preset gap is provided between the two rear wheels (32) on both sides, so that when the form transformation mechanism (4) drives the front wheel (21) to swing backward to a preset angular position, the front wheel (21) is located between the two rear wheels (32) on both sides and is coaxial with each rear wheel (32).

5. The foldable dual-mode transformation vehicle according to claim 4, characterized in that, The rear wheel mechanism (3) further comprises a guide seat (33) arranged on the surface of the rear mounting seat (31), a rack (34) arranged in the guide seat (33) and extending along the length direction of the frame (1), a second drive motor (35) slidably arranged in the guide seat (33), a gear (36) connected to the output shaft power of the second drive motor (35), and a drive slider (37) slidably arranged on the rear mounting seat (31), the rack (34) meshing with the gear (36), the drive slider (37) connected to the second drive motor (35), and both sides of the drive slider (37) are connected to the corresponding rear wheel (32) via drive connecting rods (38).

6. The foldable dual-mode transformation vehicle according to claim 5, wherein L-shaped sliding holes (39) are provided on both sides of the rear mounting seat (31) in the width direction, the driving slider (37) is slidably arranged in the inner cavity of the rear mounting seat (31), the driving connecting rod (38) is rotatably connected to the driving slider (37), the outer end of the driving connecting rod (38) penetrates into the L-shaped sliding hole (39), and the outer end of the driving connecting rod (38) is connected to a guide column (310) that cooperates with the L-shaped sliding hole (39); A first electromagnet (23) is provided on both sides of the front wheel (21), and a second electromagnet (311) is provided on the inner sides of the rear wheels (32) on both sides, so as to pull the rear wheels (32) on both sides closer by means of the magnetic attraction force between the second electromagnets (311) on both sides, or to pull the front wheel (21) and the rear wheel (32) closer by means of the magnetic attraction force between the first electromagnet (23) and the second electromagnet (311).

7. The foldable dual-mode transformation vehicle according to claim 6, wherein The bottom of the guide column (310) is connected to a support column (312), the bottom of the support column (312) is connected to a rear support frame (313), the rear wheel (32) is mounted on the outer side of the rear support frame (313), and the second electromagnet (311) is mounted on the inner side of the rear support frame (313).

8. The foldable dual-mode transformation vehicle according to claim 1, characterized in that The frame (1) comprises a front frame body (101), an intermediate frame body (102) and a rear frame body (103); the front wheel mechanism (2) is connected to the front frame body (101); the rear wheel mechanism (3) is connected to the rear frame body (103); the form-changing mechanism (4) is arranged on the intermediate frame body (102); and further comprises a front end (5) rotatably arranged on the front frame body (101); the bottom end of the front end (5) is connected to the front wheel mechanism (2) to control the steering of the front wheel mechanism (2).

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