CN112824219A

CN112824219A - Electric balance car

Info

Publication number: CN112824219A
Application number: CN201911134544.6A
Authority: CN
Inventors: 应佳伟
Original assignee: Hangzhou Chic Intelligent Technology Co Ltd
Current assignee: Hangzhou Chic Intelligent Technology Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2021-05-21

Abstract

The application provides an electrodynamic balance car, this electrodynamic balance car includes: at least one load-bearing platform; the two wheels are connected with the bearing platform; the balance car can keep balance in a dynamic and stable mode. The technical problems of complex structure and single purpose of the electric balance car in the prior art are solved.

Description

Electric balance car

Technical Field

The application relates to the field of balance cars, in particular to an electric balance car.

Background

The operation principle of the electric balance car is mainly established on the basic principle called dynamic stability, the structure of the existing electric balance car is complex, the playability and the interest are not high, and the limitation of the function and the use is strong.

At present, a balance car with simple structure and diversified purposes is urgently needed to appear.

Disclosure of Invention

In view of this, an object of the present application is to provide an electric balance car, so as to solve the technical problems of complex structure and single purpose of the electric balance car in the prior art.

The embodiment of the application provides an electrodynamic balance car, includes: at least one load-bearing platform; the two wheels are connected with the bearing platform; the balance car can keep balance in a dynamic and stable mode.

Optionally, an electric control system is arranged in the balance car, and the electric control system controls the wheels to rotate and enables the bearing platform to keep a balanced state.

Optionally, when the load-bearing platform is subjected to an external force or touched, the balance car keeps balance in a dynamic stabilization manner.

Optionally, the balance car may be rotated in place by the wheels or by the load-bearing platform.

Optionally, the balance car realizes the in-situ rotation in an electric control mode or through external force assistance.

Further optionally, the two wheels are driving wheels, and the electric control system further includes a differential mechanism, wherein the differential mechanism controls the two wheels to rotate at a differential speed, so that the bearing platform rotates in place.

Further optionally, at least one of the two wheels is a universal wheel, and the bearing platform rotates in place under the assistance of external force through the wheel.

Optionally, at least one of the wheels is disposed at a side of the carrying platform, or at a bottom of the carrying platform, or penetrates the carrying platform and is rotatably connected therewith.

Optionally, the rotation axes of the two wheels are on the same straight line; or parallel to each other.

Further optionally, the two wheels are arranged on the front side and the rear side or the left side and the right side of the same bearing platform; or, the number of the bearing platforms is at least two, and the two wheels are respectively arranged on the different bearing platforms.

Further optionally, the load-bearing platforms on which the two wheels are located are connected by a connecting member.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a first alternative electric balance car provided in an embodiment of the present application;

fig. 2 is a schematic view of a second alternative electric balance car provided in the embodiment of the present application;

fig. 3 is a schematic view of a third alternative electric balance car provided in the embodiment of the present application;

fig. 4 is a schematic view of a fourth alternative electric balance car provided in the embodiment of the present application;

fig. 5 is a schematic view of a fifth alternative electric balance car provided in the embodiment of the present application;

fig. 6 is a schematic view of a sixth alternative electric balance car provided in the embodiment of the present application;

fig. 7 is a schematic view of a seventh alternative electric balance car provided in the embodiment of the present application;

fig. 8 is a schematic view of an eighth alternative electric balance car provided in the embodiment of the present application;

fig. 9 is a schematic view of a ninth alternative electric balance car provided in the embodiment of the present application;

fig. 10 is a schematic view of a tenth alternative electric balance car provided in the embodiment of the present application;

fig. 11 is a schematic view of an eleventh alternative electric balance car provided in the embodiment of the present application;

fig. 12 is a schematic view of a twelfth alternative electric balance car provided in the embodiment of the present application;

fig. 13 is a schematic view of a thirteenth alternative electric balance car provided in the embodiment of the present application;

fig. 14 is a schematic view of a fourteenth alternative electric balance car provided in the embodiment of the present application;

fig. 15 is a schematic view of a fifteenth alternative electric balance car provided in the embodiment of the present application;

fig. 16 is a schematic view of a sixteenth alternative electric balance car provided in the embodiment of the present application;

fig. 17 is a schematic view of a seventeenth alternative electric balance car provided in the embodiment of the present application.

Icon: 10-a wheel; 20-carrying the platform.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides an electrodynamic balance car to solve the technical problem that electrodynamic balance car structure among the prior art is complicated, the usage is single.

To facilitate understanding of the present embodiment, a detailed description will be first given of an electric balance car disclosed in an embodiment of the present application, the electric balance car including: at least one load-bearing platform 20; two wheels 10, wherein the wheels 10 are connected with the bearing platform 20; the balance car can keep balance in a dynamic and stable mode.

The electric balance car comprises two wheels 10, as shown in figures 1 to 17, the electric balance car adopts a two-wheel design and is simple in structure;

the electrodynamic balance car comprises at least one load-bearing platform 20, briefly described below with reference to fig. 1 to 17:

as shown in fig. 1 to 5, 12, 13 and 17, the balance car includes a load-bearing platform 20;

as shown in fig. 6 to 11, the balance car includes two load-bearing platforms 20;

as shown in fig. 14 to 16, the balance car includes three load-bearing platforms 20;

of course, the balance car may also include more than 4 load-bearing platforms 20: in an alternative embodiment, the carrying platform 20 and the wheels 10 are arranged in the same manner as shown in fig. 1 to 17, that is, a plurality of carrying platforms 20 are connected with each other to form a whole, or the plurality of carrying platforms 20 are divided into two groups, the carrying platforms 20 in each group are connected with each other, and the two wheels 10 are respectively connected with the two groups of carrying platforms 20.

Any of the load-bearing platforms 20 of the at least one load-bearing platform 20 of the above embodiments may be of any shape. For example, in some alternative embodiments, as shown in fig. 1, 4-16, the load-bearing platform 20 is a plate-like structure; in another alternative embodiment, as shown in FIG. 2, the load-bearing platform 20 is an oval structure; in yet another alternative embodiment, as shown in fig. 3, the supporting platform 20 is a shaped structure with irregular edges, and the upper surface of the supporting platform 20 is an irregular curved surface structure; as shown in fig. 9, the load-bearing platform 20 may be of any shape.

The platform 20 in the above embodiments is a structure for supporting a rider or an object, and the platform 20 may be integrally formed or a combination of a plurality of supporting structures. Preferably, the load-bearing platform 20 may have an installation space on or inside for installing the components of the power control system.

By adopting the application, the structure is simpler by adopting the arrangement of at least one bearing platform 20 and two wheels 10, the balance is realized by adopting the dynamic stability principle, and the balance effect is stable and efficient. And at least one load-bearing platform 20 both can carry people and also can carry thing, increases the functional usage of electrodynamic balance car, has solved the electrodynamic balance car complicated structure that exists among the prior art, the single technical problem of usage.

In the embodiment of the present application, a power control system is provided in the electric balance car, and the power control system controls the wheels 10 to rotate and keeps the load-bearing platform 20 in a balanced state.

Wherein, the power control system preferably includes but is not limited to: sensor group and servo control system. The sensor group is preferably, but not limited to: one or more of a gyroscope, an acceleration sensor, and a pressure sensor.

In a preferred embodiment, the electric balance car uses a gyroscope and an acceleration sensor inside the car body to detect the change of the car body posture, and uses a servo control system to accurately drive the motor to make corresponding adjustment so as to control the rotation of the wheels 10 to keep the balance of the carrying platform 20.

In another preferred embodiment, the electric balance vehicle further comprises a pressure sensor, and the electric balance vehicle is used for indirectly detecting the change of the posture of the vehicle body by the pressure sensor inside the vehicle body, and the motor is precisely driven to perform corresponding adjustment by using a servo control system so as to control the rotation of the wheel 10 to keep the balance of the bearing platform 20.

In the above embodiment, the balance car keeps balance in a dynamic and stable manner when the load-bearing platform 20 is acted by an external force or touched.

When the bearing platform 20 of the balance car is acted by external force, it can be understood that when a rider steps on the bearing platform 20 or when an object is placed on the bearing platform 20, the bearing platform 20 is acted by external force from the rider or the object, and at the moment, the balance car keeps balance. So set up, for other open balanced mode (for example, just start immediately and keep balance at the start), improved the security of using and user's experience degree, just open balanced mode when detecting that there is the exogenic action, conveniently ride passerby and get on the bus.

Here, when the platform 20 of the balance car is touched, it can be understood that the balance mode can be turned on when the platform 20 touches the feet of the rider but the rider does not really step on the platform 20, or the balance mode can be turned on when the platform 20 feels the touch of the rider in other ways.

In the above embodiments, various sensors may be used to implement the above functions, such as a pressure sensor, an infrared sensor, a distance sensor, and the like. The mounting position can be various, for example, the mounting position is mounted on the upper surface of the carrying platform 20, or the mounting position is mounted inside the carrying platform 20.

In the above embodiments, the balance car may be rotated in place by the wheels 10 or by the load-bearing platform 20.

Wherein the in situ rotation may be understood to include, but is not limited to, the following forms: the displacement is 0, or is understood to be the manner of rotation about which one wheel 10 of the balance car is centered. The angle of rotation is preferably 360 °.

In the embodiment, the balance car realizes in-situ rotation in an electric control mode or realizes in-situ rotation by external force assistance.

In an alternative embodiment, the in-situ rotation is achieved by the load-bearing platform 20 and electronically controlled: as shown in fig. 2, the wheel 10 is kept still, the electric control mode is used to control the bearing platform 20 to rotate 360 degrees first, at this time, the rider completes the backward rotation operation, and then the electric control mode is used to control the wheel 10 to rotate in the opposite direction, so as to realize the in-situ rotation operation of the whole vehicle.

In another alternative embodiment, the in-situ rotation is achieved by the load-bearing platform 20 and external force assistance: as shown in fig. 3, the wheel 10 is kept still, the bearing platform 20 is rotated 360 ° relative to the wheel 10 by means of external force assistance, and then the wheel 10 is rotated in an opposite direction by means of external force assistance, so that the operation of in-situ rotation of the entire vehicle is realized.

In a further alternative embodiment, the rotation in place is achieved by means of the wheel 10 and electronically controlled: as shown in fig. 4, the two wheels 10 are both driving wheels, one wheel 10 is controlled to move forwards in an electric control manner, the other wheel 10 is controlled to move backwards, and the bearing platform 20 is driven to complete the in-situ rotation by the principle of differential rotation.

In yet another alternative embodiment, the in-situ rotation is achieved by the wheel 10 and external force assistance: as shown in fig. 12, one is a driving wheel, and the other is a universal wheel, at this time, the balance car can use the driving wheel as a shaft, and the universal wheel is controlled to complete in-situ rotation around the driving wheel under the action of external force assistance; alternatively, as shown in fig. 13, both wheels 10 are universal wheels, and at this time, the balance car may complete the operation of rotating in place with the aid of external force.

The external force assisting method may be, but is not limited to: manual assistance or assistance by a rider applying an external force with a tool.

In the above alternative embodiment, when the pivot rotation is completed in an electric control manner, the two wheels 10 are driving wheels, and the electric control system further includes a differential mechanism, which controls the two wheels 10 to rotate at a differential speed, so as to realize the pivot rotation of the bearing platform 20.

Through the embodiment, differential rotation is realized by adopting the differential mechanism, so that simplicity and high efficiency are realized.

As shown in fig. 10 to 13, in the electric balance vehicle, one or both of the two wheels 10 are universal wheels, and the load-bearing platform 20 rotates in place under the assistance of external force through the wheels 10. The external force is assisted by an external force applied to the load-bearing platform 20 or the wheel 10 so that the movement direction of the load-bearing platform 20 or the wheel 10 is changed. It will be appreciated that when a rider is carried on the load-bearing platform 20, the external force may be a force exerted by the rider's body, such as a foot force; the external force may be an external force, such as an external mechanical force, independent of the motorized balance car when the load platform 20 is loaded.

In the present embodiment, as shown in fig. 10 and 12, one of the two wheels 10 is a driving wheel, and the other is a universal wheel. Fig. 10 shows an electrodynamic balance car having a first load-bearing platform and a second load-bearing platform, where the first load-bearing platform and the second load-bearing platform are connected to each other through a connecting part, where the connection may be a fixed connection or a movable connection. The universal wheel is connected with first load-bearing platform, through applying external force or applying external force to load-bearing platform 20 to the universal wheel for the universal wheel direction of motion changes, and simultaneously, the drive wheel keeps the motion state of relative stability at this in-process, and the position of drive wheel keeps the equilibrium state in original place basically promptly, like this, uses the drive wheel as the centre of a circle, and the universal wheel drives first load-bearing platform and does circular motion. In this embodiment, since the first bearing platform and the second bearing platform are connected to each other, the first bearing platform moves and drives the second bearing platform to make a circular motion around the driving wheel, so that the bearing platform 20 rotates in place under the assistance of external force through the wheel 10. Fig. 12 differs from fig. 10 in that the electrodynamic balance car shown in fig. 12 has a load-bearing platform 20, to which both the universal wheels and the drive wheels are connected. In this embodiment, the principle of the bearing platform 20 rotating in situ is the same as that in fig. 10, and the movement direction of the universal wheel is changed by applying an external force to the universal wheel or applying an external force to the bearing platform 20, and meanwhile, the driving wheel keeps a relatively stable movement state in the process, so that the universal wheel drives the bearing platform 20 to make a circular movement with the driving wheel as a center of circle, that is, the bearing platform 20 rotates in situ under the assistance of the external force through the wheel 10. It is understood that the term "pivot" as used herein refers to the rotation about the driving wheel, and the universal wheel drives the platform 20 to move in a circular motion.

In the present embodiment, as shown in fig. 11 and 13, the two wheels 10 are universal wheels. Fig. 11 shows an electric balance car having a first bearing platform and a second bearing platform, where the first bearing platform and the second bearing platform are connected to each other through a connecting component, where the connection may be a fixed connection or a movable connection. The two wheels 10 are connected with the first bearing platform and the second bearing platform. By applying external force to the two wheels 10 or the bearing platform, the movement directions of the two universal wheels are opposite, so that the first bearing platform and the second bearing platform are driven to rotate in the same direction, and the bearing platform 20 rotates in situ under the assistance of the external force through the wheels 10. In the present embodiment, the two universal wheels are different from fig. 11 in that the electric balance vehicle shown in fig. 13 has a carrying platform 20, and both wheels 10 are connected to the carrying platform 20. The principle of the two wheels 10 rotating the platform 20 in situ under the action of external force is the same as that shown in fig. 11. It will be appreciated that the term "pivot" as used herein refers to the circular movement of the load bearing platform 20 about the midpoint of the line connecting the wheels 10.

In the embodiment, as shown in fig. 1 to 17, at least one wheel 10 is disposed at a side of the carrying platform 20, or at a bottom of the carrying platform 20, or penetrates through the carrying platform 20 and is rotatably connected thereto. In one embodiment, the two wheels 10 are arranged in the same manner. Such as the electric balance cars shown in fig. 1, 4, 5, 14, and 16, which are all disposed at the side of the carrying platform 20; alternatively, both wheels 10 are disposed at the bottom of the carrying platform 20, such as the electric balance car shown in fig. 6 to 13 and fig. 2 to 3; alternatively, both wheels 10 extend through and are rotatably connected to the load-bearing platform 20, such as the electric balance car shown in fig. 17. It will be appreciated that the two wheels 10 may be arranged differently. The two wheels 10 are connected to the platform 20 in two different arrangements of the three arrangements.

In the present embodiment, the rotation axes of the two wheels 10 are on the same straight line. The electric balance car shown in fig. 2, 4, 5, 8, 11, 14 to 17. Since the rotation of the two wheels 10 will drive the synchronous motion of the bearing platform 20 connected to the two wheels, the rotation axes of the two wheels 10 are on the same straight line, which helps to keep the motion state of each bearing platform 20 driven by the two wheels 10 in rotation consistent and stable. In the case of the motor-driven balance car shown in fig. 5, the rider stands on the support platform 20 toward or away from the front traveling direction of the motor-driven balance car with the two wheels 10 on both sides of the rider's body, so that the rider is not blocked by the wheels 10 in the front-rear direction. Of course, the rider can stand at an angle with the forward direction of the electric balance car, for example, as shown in fig. 4, the rider can stand at an angle with the forward direction of the electric balance car. The rotation axes of the two wheels 10 are on the same straight line, so that the running consistency and stability of the electric balance car are ensured.

In another embodiment, the axes of rotation of the two wheels 10 are parallel to each other. Such as the electric balance car shown in fig. 1, 3 and 7. In this embodiment, the two wheels 10 are respectively disposed on the front and rear sides of the same platform 20, and when the platform 20 carries a rider, the riding mode is similar to that of a scooter disposed on the front and rear sides of the wheels. Or, the two wheels 10 are respectively disposed on the left and right sides of the same bearing platform 20, and when the bearing platform 20 has a rider, the riding mode is similar to that of an electric balance car with the wheels disposed on the left and right sides. In another embodiment, as shown in fig. 6 to 11 and fig. 14 to 16, the number of the carrying platforms 20 is at least two, and the two wheels 10 are respectively disposed on different carrying platforms 20. The electric balance car shown in fig. 6 is composed of two bearing platforms 20, the two bearing platforms 20 are separated and are respectively connected with one wheel 10, and the electric balance car shown in fig. 7 to 11 is composed of two bearing platforms 20, the two bearing platforms 20 are connected through a connecting part, and the two bearing platforms 20 are respectively connected with one wheel 10. The electric balance vehicle shown in fig. 14 to 16 has a first bearing platform, a second bearing platform, and a third bearing platform, wherein two wheels 10 are respectively disposed on the first bearing platform and the second bearing platform, the third bearing platform is respectively connected with the first bearing platform and the second bearing platform, and the third bearing platform is parallel to the first bearing platform and the second bearing platform. The third carrying platform is disposed above the first carrying platform and the second carrying platform, as shown in fig. 14, the two wheels 10 are disposed outside the first carrying platform and the second carrying platform, respectively. In another embodiment, the third platform is coplanar with the first and second platforms, as shown in fig. 15 and 16, and the two wheels 10 are respectively disposed on the outer side or the inner side of the first and second platforms. The third load-bearing platform can be used as an auxiliary component, for example, for carrying people or goods; or for providing auxiliary riding components such as seats. It is to be appreciated that the third load-bearing platform can be coupled to one or both of the first load-bearing platform, the second load-bearing platform.

In this embodiment, the load-bearing platforms 20 on which the two wheels 10 are located are connected by a connecting member. As shown in fig. 7 to 11, in the electric balance vehicle, there are two load-bearing platforms 20, each load-bearing platform 20 is provided with a wheel 10, the two load-bearing platforms 20 are connected by a connecting component, which may be an integral structure or a plurality of interconnected structures, and the connecting component is fixedly or movably connected with the load-bearing platforms 20, so that the relative positions of the two load-bearing platforms 20 are unchanged or can move relatively; it is understood that the connecting members may be partially exposed from the load-bearing platform 20 or completely covered by the load-bearing platform 20. For example, as shown in fig. 9, the bearing platforms 20 shown by dotted lines may be in any shape, the two bearing platforms 20 are rotatably connected through a connecting part, the connecting part is completely covered in the bearing platforms 20, and the two bearing platforms 20 can rotate relatively, so as to increase the riding interest and playability.

In this embodiment, when the relative position between the two bearing platforms 20 is not changed due to the connection function of the connection component, the motion states of the two bearing platforms 20 are the same, and the dynamic stable motion of the two bearing platforms 20 in this case can be compared with the dynamic stable motion of the electric balance car with one bearing platform 20; when the connecting part is used to allow the two load-bearing platforms 20 to move relative to each other, as shown in fig. 9, the two load-bearing platforms 20 can rotate relative to each other through the connecting part, and the moving states of the two load-bearing platforms 20 can be different. In this embodiment, when the two wheels 10 drive the two carrying platforms 20 to rotate in situ, the two carrying platforms 20 are driven by the two wheels 10 to make a circular motion, and in addition, the two carrying platforms 20 can rotate relatively, so that the motion states are different. Aiming at the difference, the dynamic stability of the electric balance car can be further controlled. It will be appreciated that the movement of the load platforms 20 together requires a direct or indirect connection to the wheels 10. When the number of the bearing platforms 20 is more than three, the bearing platforms 20 where the two wheels 10 are located are connected through the connecting part, and the other bearing platforms 20 are connected to any one bearing platform 20 of the bearing platforms 20 where the two wheels 10 are located or both of the two bearing platforms 20; or the bearing platforms 20 where the two wheels 10 are located may not be connected, and at least one other bearing platform 20 is connected to the bearing platform 20 where the two wheels 10 are located to realize the connection of each bearing platform 20, as shown in fig. 14 to 16, the electric balance car has a first bearing platform, a second bearing platform, and a third bearing platform, and the third bearing platform is connected to the first bearing platform and the second bearing platform, so that the first bearing platform, the second bearing platform, and the third bearing platform together form the bearing platform 20 of the electric balance car and have integrity, and can move together under the driving of the two wheels 10.

In addition, in the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description of the present application, it should be noted that the terms "side", "bottom", "front", "back", "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

For convenience, the horizontal direction parallel to the straight-moving direction of the electric balance car is the front-back direction, the horizontal direction perpendicular to the straight-moving direction of the electric balance car is the left-right direction, and the vertical direction perpendicular to the straight-moving direction of the electric balance car is the up-down direction.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electrodynamic balance car characterized by comprising:

at least one load-bearing platform;

the two wheels are connected with the bearing platform;

the balance car can keep balance in a dynamic and stable mode.

2. The electric balance car of claim 1, wherein a power control system is provided in the balance car, and the power control system controls the wheels to rotate and keeps the carrying platform in a balanced state.

3. The electric balance car of claim 1, wherein the balance car maintains balance in a dynamic stable manner when the load-bearing platform is subjected to an external force or touched.

4. The electrodynamic balance car of claim 1, the balance car being capable of in situ rotation by the wheel or by the load-bearing platform.

5. The electric balance car of claim 4, wherein the balance car is electrically controlled or assisted by external force to rotate in place.

6. The electrodynamic balance car of claim 5, wherein two of the wheels are drive wheels, the electrical control system further comprising a differential that controls differential rotation of the two wheels to effect in-situ rotation of the load-bearing platform; or at least one of the two wheels is a universal wheel, and the bearing platform rotates in situ under the assistance of external force through the wheels.

7. The electric balance car of claim 1, wherein at least one of the wheels is disposed at a side of the carrying platform, at a bottom of the carrying platform, or penetrates the carrying platform and is rotatably connected thereto.

8. The electrodynamic balance car of claim 1, wherein the axes of rotation of the two wheels are collinear; or parallel to each other.

9. The electric balance car of claim 8, wherein the two wheels are disposed on the front and back or on the left and right sides of the same carrying platform; or, the number of the bearing platforms is at least two, and the two wheels are respectively arranged on the different bearing platforms.

10. The electrodynamic balance car of claim 9, wherein the load-bearing platforms on which the two wheels are located are connected by a connecting member.