Miniature electric automobile

Abstract

The miniature electric vehicle comprises a vehicle underframe, a main driver seat and a co-driver seat, the main driver seat and the co-driver seat are arranged on the vehicle underframe, two rear wheels are of two independent hub motor structures, and hub motors are installed on oblique suspensions through independent rear axles. At least one battery bin is arranged below the main driver seat and the co-driver seat and at the position, between the two independent rear axles, of the tail of the vehicle underframe, battery packs are arranged in the battery bins and located on the vehicle underframe, and each battery pack can independently supply power to the corresponding hub motor. The design scheme that a plurality of battery packs are independently detachable and are independently charged and supplied with power is adopted, so that the electric energy supply of the micro electric vehicle is continuous; by adopting the split type rear axle design and the hub motor scheme, the position space of the original integral type rear axle on the vehicle chassis is completely released, so that the mounting space of the battery pack is greatly increased, the design capacity of the battery pack is improved, and the endurance of a single whole is improved.

Description

Technical Field

[0001] The invention relates to an electric vehicle, in particular to a mini electric vehicle. Background Art

[0002] Electric vehicles are vehicles that are powered by an onboard power source and use an electric motor to drive the wheels. They are widely accepted and marketed for their environmental protection and energy saving.

[0003] As an important branch of new energy vehicles, micro electric vehicles have the advantages of low price and convenient maintenance. Existing micro electric vehicles usually have only one battery pack, which is set in the middle of the chassis, and has the defect of being difficult to replace. Moreover, when the micro electric vehicle is driving on a poor road environment, foreign objects on the road surface can easily damage the battery pack; when the battery pack with only one battery is used up, it needs to be charged before it can continue to drive on the road, which is very inconvenient for car owners who use it frequently; in addition, the rear axle of the existing micro electric vehicle is an integral bridge structure, and the motor is set on the rear axle, which compresses the space on the chassis for accommodating the battery pack, and the capacity of the battery pack cannot be increased, thus affecting the endurance after a single charge. Summary of the invention

[0004] The present invention aims to solve the existing technical problem by providing a micro electric vehicle, which adopts a design scheme in which multiple battery packs are independently detachable, independently charged and powered, so that the power supply of the micro electric vehicle is continuous, and the problem of the vehicle being unusable due to charging is eliminated; the installation positions of the multiple battery packs avoid the middle part of the vehicle chassis, thereby improving driving safety; the split rear axle design and the hub motor scheme are adopted, so that the position space of the original integral rear axle on the vehicle chassis is completely released, thereby greatly increasing the installation space of the battery pack, and then increasing the design capacity of the battery pack, thereby improving the overall endurance of the single vehicle.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] The present invention discloses a micro electric vehicle, comprising a chassis, two front wheels and two rear wheels arranged on both sides of the chassis, a main driver's seat and a co-driver's seat arranged on the chassis, and a brake system, wherein the two rear wheels are two independent wheel hub motor structures, and the wheel hub motor is installed on an oblique suspension through an independent rear axle, and the oblique suspension is arranged on the chassis, and at least one battery compartment is respectively arranged below the main driver's seat and the co-driver's seat and at a position between the two independent rear axles at the rear of the chassis, wherein a battery pack is arranged in the battery compartment, and the battery pack is arranged on the chassis, and each battery pack can independently supply power to the wheel hub motor.

[0007] Compared with the prior art, the micro electric vehicle of the present invention is provided with a plurality of battery packs, and each battery pack can independently supply power to the wheel hub motor. Therefore, when one of the battery packs is exhausted, it can be taken out and charged, and the remaining battery packs continue to provide power to the wheel hub motor, thereby realizing the sustainability of the driving time of the micro electric vehicle and being suitable for the use scenario of urban taxis; the rear wheels connected to the chassis by an independent rear axle release the space between the two independent rear axles on the chassis, providing the possibility for designing at least one battery compartment at the rear of the chassis, thereby maximizing the battery pack capacity of the whole vehicle; the battery pack is located on the chassis, that is, the battery pack is protected by the chassis, and when driving in an environment with poor road conditions, it will not directly contact the bumpy road surface and cause potholes; in addition, since the micro electric vehicle of the present invention is small in size, in order to improve space utilization, the main driver's seat and the co-driver's seat are deliberately designed to be staggered front and back.

[0008] The brake system includes a brake pedal, a front brake hydraulic cylinder and a rear brake hydraulic cylinder. The brake pedal is hinged on the frame. By stepping on the brake pedal, the brake pedal is flipped around the hinge position, and then the front brake push rod and the rear brake push rod on the brake pedal push the piston of the front brake hydraulic cylinder and the piston of the rear brake hydraulic cylinder respectively, thereby achieving braking of the front and rear wheels; the distance between the piston of the front brake hydraulic cylinder and the front brake push rod is smaller than the distance between the piston of the rear brake hydraulic cylinder and the rear brake push rod.

[0009] Since the left and right wheelbases and the front and rear wheelbases of the micro electric vehicle of the present invention are relatively small, and the center of gravity of the vehicle is biased towards the middle and rear part of the vehicle, in order to eliminate the risk of vehicle loss of control caused by braking, the synchronization of the front and rear wheel brakes is staggered. When the brake pedal is stepped on, the front brake assembly starts working first, followed by the rear brake assembly, thereby avoiding vehicle tail-spinning and braking loss of control.

[0010] The battery pack under the main driver's seat and the co-driver's seat faces the main driver's door and the co-driver's door respectively, and the main driver's door and the co-driver's door protect the battery pack; the micro electric vehicle is also provided with a rear door, and the rear door covers and protects at least one battery compartment at the rear of the vehicle chassis between two independent rear axles.

[0011] In order to maximize the capacity of the battery pack and not waste any space, the battery compartment has no compartment cover. Therefore, we cleverly block the battery pack through the main driver's door and the co-driver's door, so that the battery pack is well protected. Moreover, the main driver's door, co-driver's door and rear door of the micro electric vehicle of the present invention are sheet metal parts made of metal materials, thereby improving the protection capability of the battery pack in various positions.

[0012] The battery pack can be pulled out and arranged in the battery compartment, including a battery shell, a wheel frame assembly and a support frame assembly arranged at the bottom of the battery shell that can be flipped, folded, retracted or opened, the wheel frame assembly is provided with rollers, and the support frame assembly is provided with a support block; the bottom of the battery shell is also provided with a slide rail, and the slide rail corresponds to the pulley on the slide pad arranged in the battery compartment.

[0013] The wheel frame assembly and the support frame assembly enable the battery pack of the present invention to achieve a function of free movement, so that when the battery pack is taken out, it is convenient to move to the charging position.

[0014] A reversible handle is provided at one end of the top of the battery case, and the handle can be lifted or lowered. When the handle is lifted, the battery pack can be conveniently moved, and when the handle is lowered, it becomes the outer frame of the battery case, which also plays a certain protective role on the battery case.

[0015] The battery pack is connected to the circuit system of the vehicle through a battery connector. The battery connector includes a sub-plug arranged on the battery pack and a female plug arranged on the frame and corresponding to the sub-plug. An elastic sleeve is provided between the female plug and the frame.

[0016] By providing an elastic sleeve, a flexible connection structure is formed at the plug-in position of the battery pack and the circuit system, thereby preventing the weight stress of the battery pack from being concentrated on the battery connector and causing damage to the battery connector when the vehicle is driving on bumpy roads.

[0017] The wheel frame assembly includes a left wheel frame, a right wheel frame and a connecting plate connecting the left wheel frame and the right wheel frame, the left wheel frame and the right wheel frame are respectively provided with rollers, and the left wheel frame and the right wheel frame are respectively provided with coaxial pivot shafts, the pivot shafts are pivotally connected to the pivot seats, and the pivot shafts are sleeved with torsion springs, which have an elastic force on the wheel frame assembly to always rotate in the retracting direction; a limit rod is also provided between the left wheel frame and the right wheel frame, and the limit rod is limited by the limit assembly, so that the wheel frame assembly is in a retracted or opened state.

[0018] The wheel frame assembly is automatically folded by means of a torsion spring, a limit assembly and a limit rod. When folded by the elastic force of the torsion spring, the wheel frame assembly flips around the pivot axis and flips toward the side of the battery shell. This flipping impact force has a certain impact force on the battery shell. In order to protect the battery shell from damage, the present invention adds a connecting plate, and corresponding connecting grooves and wheel grooves are arranged on the side of the battery shell. When the wheel frame assembly is flipped into place, the connecting plate matches in the connecting groove, and the roller matches in the wheel groove.

[0019] The limit assembly includes a limit block and an elastic member, the limit block is hinged on the pivot seat, and a limit groove and a pressure plate are provided on the limit block, the limit groove corresponds to the matching limit rod, and the support frame assembly is provided with a driving member facing the pressure plate. When the support assembly is folded, the driving member squeezes the pressure plate to flip downward around the hinge point of the limit block and the pivot seat, thereby causing the limit groove to flip upward, and then causing the limit rod locked by the limited groove to disengage from the limit groove, and the wheel frame assembly is in a folded state; the elastic member is facing the pressure plate and is in the reverse position of the driving member, and has a reverse force on the pressure plate. When the driving member leaves the pressure plate and loses the squeezing force on the pressure plate, the elastic member causes the pressure plate to flip upward around the hinge point. At the same time, when the wheel frame assembly is manually flipped to an open state, the limit rod just falls into the limit groove.

[0020] The limiting assembly of the present invention is cleverly designed and realizes automatic retraction of the wheel frame assembly through the lever principle, with low cost and good effect.

[0021] The limiting groove is formed by an upper extension block and a lower extension block arranged at the front end of the limiting block, and the outer corners of the upper extension block and the lower extension block have rounded corners.

[0022] The elastic member is a U-shaped structure, comprising a fixed arm and an elastic arm, and the elastic arm and the fixed arm are transitionally connected via an arc plate.

[0023] The support frame assembly includes a support arm, the support block is located at one end of the support arm, and a hinge shaft is provided at the other end of the support arm. The two ends of the hinge shaft are respectively passed through two hinge seats, and a torsion spring is also sleeved on the hinge shaft. The torsion spring has an elastic force on the support arm to always rotate in the opening direction.

[0024] When the support frame assembly and the wheel frame assembly are in the open state, the distance of the battery pack from the ground is consistent with the distance of the battery compartment from the ground, so that when the battery pack is moved to the battery compartment position by the handle, the battery installation operation can be completed by simply pushing the battery pack into the battery compartment, which is labor-saving and simple.

[0025] The sliding pad is provided with a guide inclined plate. When the battery pack is pushed toward the battery compartment, the support block on the support arm is blocked by the guide inclined plate and guided by the force, so that the support frame is flipped inward and retracted.

[0026] The design of the guide ramp allows the support frame assembly to automatically flip and retract when the battery pack is pushed into the battery compartment, thereby triggering the limit assembly to automatically flip and retract the wheel frame assembly, thereby improving the convenience of battery installation.

[0027] The beneficial effects of the present invention are:

[0028] Compared with the prior art, in the micro electric vehicle of the present invention, each battery pack has an independent charging port and has the function of independently supplying power to the hub motor, so that the micro electric vehicle of the present invention can continuously maintain its endurance and is suitable for urban rental; the unique independent rear axle design frees up the space at the rear axle position, providing the possibility of increasing the battery compartment, thereby increasing the endurance; the battery pack is located above the vehicle chassis as a whole to avoid being hit by stones on the ground where the vehicle is driving, greatly improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of the micro electric vehicle of the present invention from one viewing angle;

[0030] Figure 2 A three-dimensional diagram of the micro electric vehicle of the present invention from another viewing angle;

[0031] Figure 3 It is a three-dimensional diagram of the micro electric vehicle of the present invention after removing the main driver's door and the co-driver's door;

[0032] Figure 4 It is a partial structural stereogram of the mini electric vehicle of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the mini electric vehicle of the present invention from a top view;

[0034] Figure 6 It is a three-dimensional diagram of the battery pack of the micro electric vehicle of the present invention when it is folded up and between the battery pack and the sliding pad;

[0035] Figure 7 yes Figure 6 A magnified view of part A;

[0036] Figure 8 It is a three-dimensional exploded view of the battery pack and the sliding pad of the micro electric vehicle of the present invention;

[0037] Fig. 9 is a three-dimensional diagram of a sliding pad of a micro electric vehicle of the present invention;

[0038] Fig.10 It is a three-dimensional view of the battery pack of the micro electric vehicle of the present invention when the support frame assembly and the wheel frame assembly are fully opened;

[0039] Fig.11 yes Fig.10 A magnified view of part B;

[0040] Fig.12 It is a structural schematic diagram of a limit block of a micro electric vehicle of the present invention;

[0041] Fig.13 It is a structural schematic diagram of the elastic member of the micro electric vehicle of the present invention;

[0042] Fig.14 is a three-dimensional diagram of the brake system of the micro electric vehicle of the present invention;

[0043] Fig.15 is a cross-sectional view of a brake system of a micro electric vehicle of the present invention;

[0044] Fig.16 yes Fig.15 Enlarged view of part C;

[0045] Fig.17 It is a structural schematic diagram showing the position of the female plug of the micro electric vehicle of the present invention from one viewing angle;

[0046] Fig.18 It is a structural schematic diagram showing the position of the female plug of the micro electric vehicle of the present invention from another perspective;

[0047] Fig.19 It is a three-dimensional diagram of a battery pack with a sub-plug of a micro electric vehicle of the present invention. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0049] See also Figures 1 to 19 The present invention provides a mini electric vehicle with beautiful overall appearance and light weight, comprising a chassis 1, two front wheels 2 and two rear wheels 3 arranged on both sides of the chassis 1, and a main driver's seat 4 and a co-driver's seat 5 arranged on the chassis 1, the main driver's seat 4 and the co-driver's seat 5 are staggered front and back, so as to improve space utilization, the two rear wheels 3 are two independent wheel hub motor 6 structures, and the wheel hub motor 6 is installed on an oblique suspension 47 through an independent rear axle 7, the oblique suspension 47 is arranged on the chassis 1, at least one battery compartment 8 is respectively arranged below the main driver's seat 4 and the co-driver's seat 5 and at the rear of the chassis 1 between the two independent rear axles 7, a battery pack 9 is arranged in the battery compartment 8, and the battery pack 9 is located on the chassis 1, and each battery pack 9 can independently supply power to the wheel hub motor.

[0050] The oblique suspension 47 is pivotally connected to the tilt rod 48 of the vehicle chassis 1. When the vehicle turns or bumps, the inclination angle of the rear wheel 3 can be automatically adjusted, thereby improving driving safety. The reason is that in order to increase the battery loading capacity and improve the endurance, the micro electric vehicle of the present invention also has a battery pack 9 installed at the rear of the vehicle, which causes the rear half of the vehicle to be heavier. The design of the oblique suspension 47 improves the stability and safety of the vehicle, thereby making the relationship between the battery pack 9 and the vehicle closer.

[0051] In the micro electric vehicle of the present invention, the installation entrances of several battery compartments 8 are respectively matched with the outer side surface below the main driver's seat 4, the outer side surface below the co-driver's seat 5 and the rear end 46. Therefore, the micro electric vehicle of the present invention has a battery pack 9 inserted in each battery compartment 8, and each battery pack 9 can independently supply power to the hub motor 6. Therefore, when one of the battery packs 9 is exhausted, it can be taken out and charged, and the remaining battery packs 9 continue to provide power to the hub motor 6, thereby realizing the sustainability of the driving time of the micro electric vehicle, which is suitable for the use scenario of urban taxis.

[0052] The rear wheel 3 connected to the chassis 1 by an independent rear axle 7 releases the space between the two independent rear axles 7 on the chassis 1, making it possible to design at least one battery compartment 8 at the rear of the chassis 1, thereby maximizing the capacity of the battery pack 9 of the entire vehicle.

[0053] The battery pack 9 is located on the chassis 1, that is, the battery pack 9 is protected by the chassis 1. When driving under a poor road surface, the battery pack 9 will not directly contact the potholes on the road surface and cause potholes. The battery pack 9 located below the main driver's seat 4 and the co-driver's seat 5 is protected by the chassis 1 as well as the main driver's door 10 and the co-driver's door 11 made of metal. Because the battery pack 9 below the main driver's seat 4 and the co-driver's seat 5 is directly facing the main driver's door 10 and the co-driver's door 11, this is also to a certain extent to maximize the capacity of the battery pack 9 and not waste any space. Therefore, the battery compartment 8 is designed without a compartment cover. Therefore, we cleverly block the battery pack 9 through the main driver's door 10 and the co-driver's door 11, so that the battery pack 9 in the battery compartment 8 is well protected; in addition, we design a rear door (not shown in the figure) on the rear side of the vehicle. The metal rear door (not shown in the figure) covers and protects at least one battery compartment 8 at the rear of the chassis 1 between the two independent rear axles 7.

[0054] Since the left and right wheelbases and the front and rear wheelbases of the micro electric vehicle of the present invention are relatively small, the battery pack 8 is concentrated in the middle and rear section of the vehicle, which causes the center of gravity of the vehicle to be biased toward the rear of the vehicle. In order to eliminate the risk of vehicle loss of control caused by braking, the synchronization of the front and rear wheel brakes is staggered. When the brake pedal 49 is stepped on, the front brake assembly starts working first, followed by the rear brake assembly, thereby avoiding the vehicle from losing control due to tail-swinging braking. Specifically: the brake system includes a brake pedal 49, a front brake hydraulic cylinder 50 and a rear brake hydraulic cylinder 51. The brake pedal 49 is hinged on the vehicle frame. By stepping on the brake pedal 49, the brake pedal 49 is flipped around the hinge position, and then the front brake push rod 52 and the rear brake push rod 53 on the brake pedal 49 respectively push the piston 54 of the front brake hydraulic cylinder 50 and the piston 55 of the rear brake hydraulic cylinder 51, thereby achieving braking of the front wheel 2 and the rear wheel 3; the distance d1 between the piston 54 of the front brake hydraulic cylinder 50 and the front brake push rod 52 is smaller than the distance d2 between the piston 55 of the rear brake hydraulic cylinder 51 and the rear brake push rod 53.

[0055] The battery pack 9 is arranged in a retractable and slideable manner in the battery compartment 8, and includes a battery shell 12, a wheel frame assembly and a support frame assembly arranged at the bottom of the battery shell 12, which can be flipped, folded, retracted or opened,

[0056] The wheel frame assembly realizes the automation of the retraction and extension of the wheel frame assembly through the structural design of the torsion spring 13, the limit assembly 14 and the limit rod 15. Specifically, the wheel frame assembly includes a left wheel frame 16, a right wheel frame 17 and a connecting plate 18 connecting the left wheel frame 16 and the right wheel frame 17. The left wheel frame 16 and the right wheel frame 17 are respectively provided with rollers 19, and the left wheel frame 16 and the right wheel frame 17 are respectively provided with coaxial pivot shafts 20, the pivot shaft 20 is pivotally connected to the pivot seat 21, and the pivot shaft 20 is sleeved with a torsion spring 13, which has an elastic force on the wheel frame assembly to always rotate in the retracting direction; a limit rod 15 is also provided between the left wheel frame 16 and the right wheel frame 17, and the limit rod 15 is limited by the limit assembly 14, so that the wheel frame assembly is in a retracted or opened state.

[0057] When the wheel frame assembly is folded up due to the elastic force of the torsion spring 13, the wheel frame assembly flips around the pivot shaft 20 and flips toward the side of the battery shell 12. This flipping impact force has a certain impact force on the battery shell 12. In order to protect the battery shell 12 from damage, the present invention adds a connecting plate 18, and correspondingly sets a connecting groove 22 and a wheel groove 23 on the side of the battery shell 12. When the wheel frame assembly is flipped into place, the connecting plate 18 matches in the connecting groove 22, and the roller 19 matches in the wheel groove 23. The setting of the connecting groove 22 and the wheel groove 23 also plays a role in positioning and limiting the wheel frame assembly after it is folded up, thereby indirectly protecting the wheel frame assembly.

[0058] It was mentioned earlier that the battery pack 9 is of a retractable and slide-in type. The reason is that the bottom of the battery shell 12 described in the present invention is also provided with two left-right symmetrical slide rails 24, and the slide rails 24 correspond to the pulleys 26 on the slide pads 25 provided in the battery compartment 8. The pulleys 26 can support the battery pack 9 and enable the battery pack 9 to slide smoothly into the battery compartment 8.

[0059] In order to facilitate the movement of the battery pack 9, a reversible handle 27 is provided at one end of the top of the battery shell 12, and the handle 27 can be lifted or lowered. When the wheel frame assembly is in the open state, the roller 19 is on the ground, and the battery pack 9 can be easily moved by lifting the handle 27. When the battery pack 9 needs to be placed aside for charging or storage, the support frame assembly provides support.

[0060] The support frame assembly includes a support arm 28, one end of the support arm 28 is provided with a support block 29, and the other end of the support arm 28 is provided with a hinge shaft 30, the two ends of the hinge shaft 30 are respectively passed through two hinge seats 31, and a torsion spring 32 is also sleeved on the hinge shaft 30. The torsion spring 32 has an elastic force on the support arm 28 to always rotate in the opening direction. Therefore, when the battery pack 9 leaves the battery compartment 8, the torsion spring 13 drives the support arm 28 to open, thereby providing the battery pack 9 with supporting force.

[0061] In summary, the support frame assembly of the present invention is driven to open automatically by the torsion spring 32, and the support frame assembly is folded when the battery pack 9 slides into the battery compartment 8 and is blocked and guided by the guide ramp 33 provided on the sliding pad 25 in the battery compartment 8, so that the support arm 28 slowly flips around the hinge shaft 30 and finally reaches a fully folded state.

[0062] When the support frame assembly is fully retracted, the driving member 34 on the support frame assembly triggers the limit assembly 14, so that the wheel frame assembly is automatically flipped and retracted. Specifically: the limit assembly 14 includes a limit block 35 and an elastic member 36, the limit block 35 is hinged on the pivot seat 21, and a limit groove 37 and a pressure plate 38 are provided on the limit block 35, and the limit groove 37 corresponds to the matching limit rod 15, so when the support assembly is retracted, the driving member 34 squeezes the pressure plate 38 to flip downward around the hinge point between the limit block 35 and the pivot seat 21, so that the limit groove 37 flips upward, and then the limit rod 15 locked by the limit groove 37 is disengaged from the limit groove 37, and the wheel frame assembly is acted upon by the torsion spring 13 and flips to a retracted state.

[0063] Of course, when the support frame assembly and the wheel frame assembly are in the open state, it is because the battery pack 9 leaves the battery compartment 8, the torsion spring 32 drives the support frame assembly to open, and the elastic member 36 is opposite to the pressure plate 38 and is in the opposite position of the driving member 34, and has a reverse force on the pressure plate 38. Therefore, when the support frame assembly is opened, the driving member 34 leaves the pressure plate 38, thereby losing the squeezing force on the pressure plate 38, and the elastic member 36 causes the pressure plate 38 to flip upward around the hinge point. At the same time, when the wheel frame assembly can be manually flipped to the open state, the limit rod 15 just falls into the limit groove 37.

[0064] The limiting groove 37 is formed by an upper extension block 43 and a lower extension block 44 disposed at the front end of the limiting block 35, and the outer corners of the upper extension block 43 and the lower extension block 44 have rounded corners 45. The design of the rounded corners 45 helps the limiting rod 15 to fall into the limiting groove 37 better and more smoothly.

[0065] The elastic member 36 is a U-shaped structure, including a fixed arm 39 and an elastic arm 40, and the elastic arm 40 and the fixed arm 39 are transitionally connected by an arc plate 41. Of course, the elastic member 36 of the present invention is not limited to this structure, as long as it has elastic properties and is sufficient to successfully flip the limit block 35.

[0066] In order to facilitate the installation, removal and movement of the battery pack 9, when the support frame assembly and the wheel frame assembly are in the open state, the ground clearance of the battery pack 9 is consistent with the ground clearance of the battery compartment 8, that is, the height of the battery pack 9 supported by the support frame assembly and the wheel frame assembly is consistent with the height of the battery compartment 8 on the micro electric vehicle, so that when the battery pack 9 is moved to the battery compartment 8 position by the handle 27, the installation operation of the battery pack 9 can be completed by simply pushing the battery pack 9 into the battery compartment 8, which is labor-saving and simple.

[0067] When the vehicle is in motion, it will shake due to the uneven road surface. After the battery pack 9 is installed in the battery compartment 8, its overall weight stress is concentrated on the battery connector 56. The battery connector 56 is an intermediate component connecting the battery pack 9 with the circuit system of the vehicle. It includes a sub-plug 57 arranged on the battery pack 9 and a female plug 58 arranged on the frame and corresponding to the sub-plug 57. In order to prevent the battery connector 56 from being damaged due to concentrated stress, an elastic sleeve 59 is provided between the female plug 58 and the frame.

[0068] The micro electric vehicle provided by the embodiment of the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation modes and application scopes. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A mini electric vehicle, comprising a chassis, two front wheels and two rear wheels arranged on both sides of the chassis, a main driver's seat and a co-driver's seat arranged on the chassis, and a braking system, characterized in that: The two rear wheels are two independent hub motor structures, and the hub motor is installed on the oblique suspension through an independent rear axle. The oblique suspension is arranged on the vehicle chassis. At least one battery compartment is respectively provided below the main driver's seat and the co-driver's seat and at the rear of the vehicle chassis between the two independent rear axles. A battery pack is arranged in the battery compartment, and the battery pack is located on the vehicle chassis. Each battery pack can independently supply power to the hub motor.

2. A mini electric vehicle according to claim 1, characterized in that: The brake system includes a brake pedal, a front brake hydraulic cylinder and a rear brake hydraulic cylinder. The brake pedal is hinged on the frame. By stepping on the brake pedal, the brake pedal is flipped around the hinge position, and then the front brake push rod and the rear brake push rod on the brake pedal push the piston of the front brake hydraulic cylinder and the piston of the rear brake hydraulic cylinder respectively, thereby achieving braking of the front and rear wheels; the distance between the piston of the front brake hydraulic cylinder and the front brake push rod is smaller than the distance between the piston of the rear brake hydraulic cylinder and the rear brake push rod.

3. A mini electric vehicle according to claim 1, characterized in that: The battery pack under the main driver's seat and the co-driver's seat faces the main driver's door and the co-driver's door respectively, and the main driver's door and the co-driver's door protect the battery pack; the micro electric vehicle is also provided with a rear door, and the rear door covers and protects at least one battery compartment at the rear of the vehicle chassis between two independent rear axles.

4. A mini electric vehicle according to claim 1, characterized in that: The battery pack can be pulled out and arranged in the battery compartment, including a battery shell, a wheel frame assembly and a support frame assembly arranged at the bottom of the battery shell that can be flipped, folded, retracted or opened, the wheel frame assembly is provided with rollers, and the support frame assembly is provided with a support block; the bottom of the battery shell is also provided with a slide rail, and the slide rail corresponds to the pulley on the slide pad arranged in the battery compartment.

5. A mini electric vehicle according to claim 1, 2, 3 or 4, characterized in that: The battery pack is connected to the circuit system of the vehicle through a battery connector, and the battery connector includes a sub-plug arranged on the battery pack and a female plug arranged on the vehicle frame and corresponding to the sub-plug, and an elastic sleeve is arranged between the female plug and the vehicle frame.

6. A mini electric vehicle according to claim 4, characterized in that: The wheel frame assembly includes a left wheel frame, a right wheel frame and a connecting plate connecting the left wheel frame and the right wheel frame, the left wheel frame and the right wheel frame are respectively provided with rollers, and the left wheel frame and the right wheel frame are respectively provided with coaxial pivot shafts, the pivot shafts are pivotally connected to the pivot seats, and the pivot shafts are sleeved with torsion springs, which have an elastic force on the wheel frame assembly to always rotate in the retracting direction; a limit rod is also provided between the left wheel frame and the right wheel frame, and the limit rod is limited by the limit assembly, so that the wheel frame assembly is in a retracted or opened state.

7. A mini electric vehicle according to claim 6, characterized in that: The limit assembly includes a limit block and an elastic member, the limit block is hinged on the pivot seat, and a limit groove and a pressure plate are provided on the limit block, the limit groove corresponds to the matching limit rod, and the support frame assembly is provided with a driving member facing the pressure plate. When the support assembly is folded, the driving member squeezes the pressure plate to flip downward around the hinge point of the limit block and the pivot seat, thereby causing the limit groove to flip upward, and then causing the limit rod locked by the limited groove to disengage from the limit groove, and the wheel frame assembly is in a folded state; the elastic member is facing the pressure plate and is in the reverse position of the driving member, and has a reverse force on the pressure plate. When the driving member leaves the pressure plate and loses the squeezing force on the pressure plate, the elastic member causes the pressure plate to flip upward around the hinge point. At the same time, when the wheel frame assembly is manually flipped to an open state, the limit rod just falls into the limit groove.

8. A mini electric vehicle according to claim 7, characterized in that: The elastic member is a U-shaped structure, comprising a fixed arm and an elastic arm, and the elastic arm and the fixed arm are transitionally connected via an arc plate.

9. A mini electric vehicle according to claim 4, characterized in that: The support frame assembly includes a support arm, the support block is located at one end of the support arm, and a hinge shaft is provided at the other end of the support arm. The two ends of the hinge shaft are respectively passed through two hinge seats, and a torsion spring is also sleeved on the hinge shaft. The torsion spring has an elastic force on the support arm to always rotate in the opening direction.

10. A mini electric vehicle according to claim 4, characterized in that: The sliding pad is provided with a guide inclined plate. When the battery pack is pushed toward the battery compartment, the support block on the support arm is blocked by the guide inclined plate and guided by the force, so that the support frame is flipped inward and retracted.

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