Electric vehicle

Abstract

This disclosure relates to an electric vehicle, which may include a first platform, a second platform, wheels, a motor disposed within the wheels, a power source for powering the electric vehicle, two opposing connecting arm assemblies, at least one sensor, and at least one controller. The sensor senses the attitude of at least one of the first and second platforms and generates a corresponding attitude signal; the controller controls the motor to drive the wheels based on the attitude signal. Each of the two connecting arm assemblies has a first locking member disposed on its first arm and a second locking member disposed on its second arm. The first and second locking members are configured to cooperate in performing a user-revocable locking operation to lock the electric vehicle in its current state (either unfolded or folded) to prevent the first plate-shaped platform from rotating freely relative to the second plate-shaped platform when in the unfolded or folded state.

Description

Technical Field

[0001] This disclosure generally relates to the field of transportation technology, and in particular to an electric vehicle. Background Technology

[0002] Electric vehicles with one wheel and two relatively rotating pedals are becoming increasingly popular among teenagers and young adults due to their high level of fun and practicality as a means of transportation.

[0003] When a user needs to ride the electric vehicle, the two pedals are typically unfolded by rotating them relative to each other, allowing the user to pedal with each foot. When the user is not riding the electric vehicle, the two pedals are typically folded up by rotating them relative to each other for easy storage. However, because the two pedals are rotatably connected, they are prone to rotating relative to each other and are difficult to maintain in their current position, regardless of whether they are unfolded or folded. Summary of the Invention

[0004] Therefore, in order to address the above problems, it is necessary to provide an electric vehicle.

[0005] A first aspect of the present invention provides an electric vehicle, which may include a first plate-shaped platform and a second plate-shaped platform, each of the first plate-shaped platform and the second plate-shaped platform having a footrest surface; a wheel and a motor disposed within the wheel; a power source for powering the electric vehicle; a sensor for sensing the posture of at least one of the first plate-shaped platform and the second plate-shaped platform and generating a corresponding posture signal; at least one controller communicatively connected to the motor and the at least one sensor, for controlling the motor to drive the wheel according to the posture signal; and two connecting arm assemblies disposed opposite to each other, each connecting arm assembly including two arms rotatably connected to each other, the first arm and the second arm of each connecting arm assembly being respectively fixedly connected to the first plate-shaped platform and the second plate-shaped platform; wherein, the electric vehicle The vehicle is configured to switch between an unfolded state and a folded state. In the unfolded state, the wheels are positioned substantially centrally between the first and second plate-shaped platforms, and the foot surfaces of the first and second plate-shaped platforms are oriented to be stepped on by the user's first and second feet, respectively. In the folded state, the first and second plate-shaped platforms are closer to each other than when they are in the unfolded state. Each of the two connecting arm assemblies has a first locking member disposed on its first arm and a second locking member disposed on its second arm. The first and second locking members are configured to cooperate in performing a user-revocable locking operation to lock the electric vehicle in its current state when it is in the unfolded or folded state.

[0006] In the aforementioned electric vehicle, each of the two connecting arm assemblies has a first locking member disposed on its first arm and a second locking member disposed on its second arm. The first locking member and the second locking member are configured to cooperate in performing a locking operation that can be revoked by the user to lock the electric vehicle in its current state when it is in an unfolded or folded state, thereby preventing the first plate-shaped platform from rotating freely relative to the second plate-shaped platform in the unfolded or folded state and improving the stability of the electric vehicle in the unfolded or folded state.

[0007] A second aspect of the present invention provides an electric vehicle, comprising:

[0008] A first plate-shaped platform and a second plate-shaped platform, each of the first plate-shaped platform and the second plate-shaped platform having a stepping surface;

[0009] Wheels and motors installed within the wheels;

[0010] The power source that powers the electric vehicle;

[0011] A sensor for sensing the attitude of at least one of the first plate-shaped platform and the second plate-shaped platform and generating a corresponding attitude signal;

[0012] At least one controller communicatively connected to the motor and the at least one sensor, configured to control the motor to drive the wheel based on the attitude signal; and

[0013] Two connecting arm assemblies are arranged opposite to each other. Each connecting arm assembly includes two arms that are rotatably connected to each other. The first arm and the second arm of the two arms of each connecting arm assembly are respectively fixedly connected to the first plate-shaped platform and the second plate-shaped platform.

[0014] The electric vehicle is configured to change between an unfolded state and a folded state. In the unfolded state, the wheels are positioned substantially centrally between the first plate-shaped platform and the second plate-shaped platform, and the step surfaces of the first plate-shaped platform and the second plate-shaped platform are oriented to be stepped on by the user's first and second feet, respectively. In the folded state, the first plate-shaped platform and the second plate-shaped platform are closer to each other than when they are in the unfolded state.

[0015] Each of the two connecting arm assemblies has a first locking member disposed on its first arm and a second locking member disposed on its second arm and configured to cooperate with the first locking member to perform a user-revocable locking operation to lock the electric vehicle in one of the unfolded and folded states in the current state. The cooperating first locking member and the second locking member form a locking mechanism.

[0016] Each of the two connecting arm assemblies is provided with at least two sets of the locking mechanism at intervals.

[0017] In the aforementioned electric vehicle, by setting two sets of locking mechanisms, each connecting arm assembly can lock the first and second arms at different positions when the electric vehicle is in the unfolded or folded state, thereby improving the stability of the locking. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A first view of an electric vehicle in its unfolded state according to an embodiment of this disclosure;

[0020] Figure 2 A second view of an electric vehicle in its unfolded state, according to an embodiment of this disclosure;

[0021] Figure 3 This is a schematic diagram of the structure of an electric vehicle in a folded state according to an embodiment of the present disclosure;

[0022] Figure 4 A cross-sectional schematic diagram of an electric vehicle provided in one embodiment of this disclosure;

[0023] Figure 5 An exploded schematic diagram of an electric vehicle provided in one embodiment of this disclosure;

[0024] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0025] Figure 7 This is an exploded view of a connecting arm assembly (equipped with a locking mechanism) provided in one embodiment of this disclosure;

[0026] Figure 8 Another exploded view of a connecting arm assembly (equipped with a locking mechanism) provided in one embodiment of this disclosure;

[0027] Figure 9 An exploded view of a first locking member and a fixing plate provided in one embodiment of this disclosure;

[0028] Figure 10 An exploded view of a portion of the structure of an electric vehicle provided in one embodiment of this disclosure;

[0029] Figure 11 This is a schematic diagram of the structure of an installation carrier provided in one embodiment of the present disclosure;

[0030] Figure 12 This is a schematic diagram of the structure of a support frame provided in one embodiment of the present disclosure;

[0031] Figure 13 A schematic diagram of the structure of an electric vehicle in an intermediate state according to an embodiment of this disclosure;

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Electric vehicle; 100. First plate-shaped platform; 110. First handle; 120. Support connection; 200. Second plate-shaped platform; 220. Second handle; 300. Wheel; 400. Motor; 410. Motor shaft; 411. Wedge-shaped limit block; 412. Limit bolt; 500. Power supply; 600. Sensor; 700. Controller; 800. Connecting arm assembly; 810. First arm; 811. Fixing plate; 812. Hole; 813. First shaft hole; 814. Second shaft hole; 820. Second arm; 821. Limiting groove; 822. Third shaft hole; 830. First locking member; 831. Fixing post; 832. Spring; 833, Locking component; 8331, Connecting part; 8332, Limiting plate; 8333, Limiting post; 840, Second locking component; 850, Rotating connecting part; 900, Mounting carrier; 910, Mounting part; 911, Through hole; 912, Receiving groove; 920, Connecting arm; 921, Mounting surface; 1000, Stepping surface; 1100a, First cable; 1100b, Second cable; 1200, Cable storage box; 1210, Storage cavity; 1220, Cable threading groove; 1300, Support frame; 1310, Supporting surface; 1320, Fixing part; 1400, Placement surface; 1500, Enclosure component; 1510, Baffle; 1600, Photoelectric switch. Detailed Implementation

[0034] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this disclosure. However, this disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below.

[0035] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0038] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] Please see Figure 1-5This disclosure provides an embodiment of an electric vehicle 10, which may also be referred to as a unicycle balance skateboard, balance scooter, electric skateboard, etc. The electric vehicle 10 may include a first plate-shaped platform 100, a second plate-shaped platform 200, a wheel 300, a motor 400, a power supply 500, a sensor 600, at least one controller 700, and two connecting arm assemblies 800. Each of the first plate-shaped platform 100 and the second plate-shaped platform 200 has a footing surface 1000 for the user to step on; the two connecting arm assemblies 800 are arranged opposite to each other, each connecting arm assembly 800 including two arms rotatably connected to each other, the first arm 810 and the second arm 820 of each connecting arm assembly 800 being fixedly connected to the first plate-shaped platform 100 and the second plate-shaped platform 200 respectively, so that the first plate-shaped platform 100 and the second plate-shaped platform 200 are rotatably connected through the connecting arm assemblies 800; the motor 400 is disposed within the wheel 300, and the motor shaft 410 of the motor 400 is connected to the wheel 300. The central axes of the wheels 300 in the width direction coincide; the first plate platform 100 and / or the second plate platform 200 are connected to the motor shaft 410 of the motor 400; the power supply 500 is electrically connected to the controller 700, and the power supply 500 is used to supply power to the electric vehicle 10; the sensor 600 is used to sense the attitude (e.g., tilt angle data) of at least one of the first plate platform 100 and the second plate platform 200 and generate a corresponding attitude signal; the controller 700 is communicatively connected to the motor 400 and the sensor 600 respectively, and the controller 700 is used to control the motor 400 to drive the wheels 300 according to the attitude signal.

[0041] Furthermore, there are no particular restrictions on the type of controller 700; it can also be referred to as a circuit board. The circuit board 700 is equipped with an MCU (which may integrate a CPU, memory, timer / calculator, and various I / O circuits, etc.), also known as a microcontroller. It can be replaced by a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), or a suitable combination of these devices / electronic control circuits to similarly perform the control functions of the electric vehicle 10. These control functions specifically include, for example, receiving attitude data of the electric vehicle 10 sensed by relevant sensors and generating drive signals for the wheel motors of the electric vehicle 10 based on this attitude data.

[0042] Furthermore, there are no particular restrictions on the type of the aforementioned sensor 600, as long as it can be used to measure changes in the attitude, orientation, tilt, or position of the foot platform. It is generally mounted on a circuit board built into the electric vehicle 10 along with the aforementioned MCU. The sensor 400 is typically an inertial measurement unit (IMU), preferably a six-axis gyroscope, which may integrate a three-axis gyroscope sensor (referred to as a gyroscope) and a three-axis accelerometer sensor (referred to as an accelerometer).

[0043] It is worth noting that the number of the aforementioned sensors can be one or more, preferably one, and the number of the aforementioned controllers can also be one or more, preferably one.

[0044] The electric vehicle 10 is configured to switch between an unfolded state and a folded state, allowing a user to ride or store the electric vehicle 10. For example... Figure 1 and 2 As shown, in the deployed state, the wheels 300 are positioned substantially or substantially centered between the first plate-shaped platform 100 and the second plate-shaped platform 200, and the foot surfaces 1000 of the first plate-shaped platform 100 and the second plate-shaped platform 200 are oriented so that they can be stepped on by the user's first and second feet, respectively, so that the user can ride the electric vehicle 10 by stepping on the foot surfaces 1000 of the first plate-shaped platform 100 and the second plate-shaped platform 200, respectively. Figure 3 As shown, in the folded state, the first plate-shaped platform 100 and the second plate-shaped platform 200 are closer to each other than when they are unfolded, thus making the electric vehicle 10 occupy less space and easier to store. Note that "generally or substantially centered" here can mean centered or have a dimensional offset error of up to plus or minus 20% relative to centering.

[0045] It is understood that when the electric vehicle 10 is in the unfolded state, the user can ride the electric vehicle 10 by placing their first foot and second foot on the footrest surfaces 1000 of the first plate platform 100 and the second plate platform 200, respectively. During the ride, the user can control the first plate platform 100 and the second plate platform 200 to change their posture by placing their first foot and second foot. At this time, the sensor 600 can sense the posture of at least one of the first plate platform 100 and the second plate platform 200 and transmit the posture signal to the controller 700. After receiving the posture signal, the controller 700 will control the motor 400 to run according to the posture signal to drive the wheel 300 accordingly. Thus, the user can control the operation of the wheel 300 by changing the posture of the first plate platform 100 and the second plate platform 200 during the ride of the electric vehicle 10. For example, when the user's first foot and second foot are respectively placed on the footrest surfaces 1000 of the first plate platform 100 and 200 of the second plate platform 200, and the user is riding forward at a constant speed, if the first plate platform 100 is behind and the second plate platform 200 is in front, if the user wants to move backward, they can control the first plate platform 100 and the second plate platform 200 to tilt backward using their first and second feet. At this time, the sensor 600 will sense the changed posture of the first plate platform 100 and / or the second plate platform 200 and transmit the posture signal to the controller 700. The controller 700 will then control the motor 400 according to the posture signal, so that the motor 400 drives the wheel 300 to move backward.

[0046] Furthermore, such as Figure 7 and Figure 8 As shown, each of the two connecting arm assemblies 800 has a first locking member 830 disposed on its first arm 810 and a second locking member 840 disposed on its second arm 820. The first locking member 830 and the second locking member 840 are configured to cooperate in performing a locking operation that can be revoked by the user to lock the electric vehicle 10 in the current state when it is in the unfolded or folded state. Thus, the first locking member 830 and the second locking member 840 have an auxiliary limiting effect on the electric vehicle 10, preventing the first plate platform 100 from rotating freely relative to the second plate platform 200 when it is in the unfolded or folded state.

[0047] In some embodiments, such as Figure 7 and Figure 8As shown, in any connecting arm assembly 800, the first locking member 830 is an elastic limiting member disposed on the first arm 810, and the second locking member 840 is a limiting groove disposed on the second arm 820. In any connecting arm assembly 800, when the end of the elastic limiting member on the first arm 810 near the second arm 820 is embedded in the corresponding limiting groove under the action of elastic force, the elastic limiting member realizes a revocable locking operation on the first arm 810 and the second arm 820, that is, it realizes locking the electric vehicle 10 in the current state when the current state is the unfolded state or the folded state.

[0048] Furthermore, such as Figure 13 As shown, the electric vehicle 10 also has an intermediate state that is neither in an unfolded state nor a folded state. The end of the elastic limiting assembly near the second arm 820 is retractable. When the current state of the electric vehicle 10 is this intermediate state, the end of the elastic limiting assembly near the second arm 820 abuts against a flat surface on the side of the second arm 820 facing the first arm 810; when at least one of the first plate-shaped platform 100 and the second plate-shaped platform 200 is rotated to change the current state of the electric vehicle 10 from the intermediate state to the unfolded or folded state, the end of the elastic limiting assembly near the second arm 820 is engaged in a corresponding limiting groove under the action of an elastic force to lock the first arm 810 and the second arm 820. It should be noted that when the electric vehicle 10 is locked in the unfolded or folded state by the cooperation of the elastic limiting component and the limiting groove, if the user needs to unlock the electric vehicle 10 and change the electric vehicle 10 from the unfolded or folded state to the intermediate state, the user can apply an external force to at least one of the first plate platform 100 and the second plate platform 200 to overcome the elastic force of the elastic limiting component and cause the first arm 810 to rotate relative to the second arm 820. At this time, the end of the elastic limiting component near the second arm 820 will disengage from the limiting groove, thereby unlocking the first arm 810 and the second arm 820.

[0049] Optionally, such as Figure 6 As shown, a fixing plate 811 is connected to the first arm 810. For example, the fixing plate 811 is connected to the first arm 810 by screws. The fixing plate 811 is located on the side of the first arm 810 facing away from the second arm 820, and the fixing plate 811 is spaced apart from the first arm 810. The first arm 810 has a hole 812 corresponding to the limiting groove. One end of the elastic limiting component is connected to the fixing plate 811, and the other end passes through the hole 812. When the electric vehicle 10 is in the unfolded or folded state, the end of the elastic limiting component protruding from the hole 812 and close to the second arm 820 is embedded in the limiting groove on the second arm 820.

[0050] Optionally, such as Figure 9 As shown, the elastic limiting assembly includes a fixing post 831, a spring 832, and a locking engagement 833. The fixing post 831 is connected to the side of the fixing plate 811 facing the first arm 810. The fixing post 831, the spring 832, and the locking engagement 833 are connected in sequence, and the locking engagement 833 passes through the hole 812. Under the elastic resistance of the spring 832, the locking engagement 833 is partially located on the side of the hole 812 facing the second arm 820. The end of the locking engagement 833 away from the spring 832 tends to move towards the second arm 820 under the elastic force of the spring 832. Thus, when the electric vehicle 10 is in the unfolded or folded state and the limiting groove corresponds to the hole 812, the end of the locking engagement 833 away from the spring 832 is embedded in the limiting groove to lock the first arm 810 and the second arm 820.

[0051] Furthermore, such as Figure 9 As shown, the locking assembly 833 includes a connecting portion 8331, a limiting plate 8332, and a limiting post 8333 connected in sequence. The end of the spring 832 away from the fixing post 831 is connected to the connecting portion 8331. The connecting portion 8331 is columnar, and the limiting plate 8332 is disc-shaped, with the central axis of the limiting plate 8332 coinciding with the central axis of the connecting portion 8331. The limiting plate 8332 is located on the side of the first arm 810 facing the fixing plate 811, and the diameter of the limiting plate 8332 is larger than the diameter of the hole 812. The limiting post 8333 passes through the hole 812, and the spring 832 is in a compressed state. Under the elastic force of the spring 832, the end of the limiting post 8333 away from the limiting plate 8332 passes through the hole 812 and is located on the side of the first arm 810 facing away from the fixed plate 811. However, because the limiting plate 8332 abuts against the side of the first arm 810 facing the fixed plate 811, it has a limiting effect on the movement of the limiting post 8333, and the limiting post 8333 will not disengage from the hole 812. Therefore, even if the electric vehicle 10 is in an intermediate state and the second arm 820 does not block the hole 812 on the first arm 810, the limiting post 8333 will not slide out of the hole 812 under the elastic force of the spring 832.

[0052] In some embodiments, such as Figure 7 and Figure 8 As shown, the first locking member 830 and the second locking member 840 cooperate with each other to form a locking mechanism, and each of the two connecting arm assemblies 800 is provided with at least two sets of locking mechanisms at intervals. By providing two sets of locking mechanisms, each connecting arm assembly 800 has at least two points located at different positions to lock the first arm 810 and the second arm 820 when the electric vehicle 10 is in the unfolded or folded state, thereby improving the stability of the locking.

[0053] Optionally, each connecting arm assembly 800 is provided with two sets of locking mechanisms, and each locking mechanism includes an elastic limiting component located on the first arm 810 and an upper limiting groove located on the second arm 820. Therefore, the two sets of locking mechanisms on any connecting arm assembly 800 include two elastic limiting components located on the first arm 810 and two limiting grooves located on the second arm 820. The two elastic limiting components are spaced apart and symmetrically arranged about the rotation axes of the first arm 810 and the second arm 820; the two limiting grooves are also spaced apart and symmetrically arranged about the rotation axes of the first arm 810 and the second arm 820. When the electric vehicle 10 is in the unfolded or folded state, the two elastic limiting components engage with the two limiting grooves to lock. By providing two sets of locking mechanisms on any connecting arm assembly 800, the stability of the locking of the first arm 810 and the second arm 820 is improved.

[0054] In some embodiments, such as Figure 10 As shown, both ends of the motor shaft 410 are detachably connected to mounting carriers 900. The two mounting carriers 900 are located on both sides of the wheel 300. The mounting carriers 900 are used to connect with the connecting arm assembly 800 to fix the connecting arm assembly 800 onto the motor shaft 410. The connection between the mounting carrier 900 and the motor shaft 410 is detachable, which facilitates the assembly, disassembly, maintenance, and replacement of the mounting carrier 900 on the motor shaft 410.

[0055] In some embodiments, in any of the connecting arm assemblies 800, the first arm 810 is fixedly connected to the mounting carrier 900 located on the same side of the wheel 300, so that the first plate-shaped platform 100 and the motor shaft 410 are relatively fixed by the mounting carrier 900. The second arm 820 is rotatably connected to the first arm 810, so that the electric vehicle can be switched between an unfolded state and a folded state by rotating the second plate-shaped platform 200. Furthermore, in any of the connecting arm assemblies 800, the first arm 810 is fixedly connected to the mounting carrier 900, and the second arm 820 is rotatably connected to the first arm 810, avoiding the inconvenience of folding or unfolding the electric vehicle 10 caused by both the first plate-shaped platform 100 and the second plate-shaped platform 200 being able to rotate relative to the motor shaft 410.

[0056] Optionally, such as Figure 10 and Figure 11As shown, the mounting carrier 900 includes a mounting portion 910 and connecting arms 920 respectively connected to both sides of the mounting portion 910. The mounting portion 910 is detachably fixed to the motor shaft 410. The first arm 810 is simultaneously fixedly connected to the two connecting arms 920 of the mounting carrier 900 located on the same side as the wheel 300, and the first arm 810 is located on the side of the mounting carrier 900 facing away from the wheel 300. For example, each connecting arm 920 has a generally flat mounting surface 921, which is located on the side of the connecting arm 920 facing away from the wheel 300. Each connecting arm 920 is connected to the first arm 810 on the mounting surface 921 by two screws. The first arm 810 has a first shaft hole 813, and the end of the motor shaft 410 passes through the corresponding first shaft hole 813. In this embodiment, by connecting the first arm 810 to the two connecting arms 920 of the mounting carrier 900, the stability of the connection between the first arm 810 and the mounting carrier 900 is improved.

[0057] In some embodiments, the second arm 820 is rotatably connected to the first arm 810 via a rotating connector 850, and the second arm 820 is located on the side of the first arm 810 facing away from the mounting carrier 900. The rotating connector 850 is arranged parallel to the motor shaft 410, thereby making the axis of rotation between the first arm 810 and the second arm 820 parallel to the motor shaft 410. Furthermore, when the electric vehicle is in the unfolded state, the rotating connector 850 is coplanar with both the foot surface 1000 of the first arm 810 and the foot surface 1000 of the second arm 820. In this way, when the electric vehicle 10 in the unfolded state is folded, there will be no mutual interference between the first plate platform 100 and the second plate platform 200, which would prevent the foot surfaces 1000 of the first plate platform 100 from not fitting together.

[0058] Furthermore, the first arm 810 has a second shaft hole 814, and the second arm 820 has a third shaft hole 822. The rotating connector 850 is sequentially inserted into the second shaft hole 814 and the third shaft hole 822. The rotating connector 850 is configured to prevent the first arm 810 and the second arm 820 mounted thereon from moving relative to its axial direction, so as to ensure the stability of the second arm 820 when rotating relative to the first arm 810 through the rotating connector 850.

[0059] Optionally, such as Figure 10 and Figure 11As shown, the mounting portion 910 has a through hole 911 through which the motor shaft 410 passes. The motor shaft 410 passes through the through hole 911, thereby fitting the mounting carrier 900 onto the motor shaft 410. A receiving groove 912 communicating with the through hole 911 is provided on one side of the through hole 911. A wedge-shaped limiting block 411 is embedded in the receiving groove 912, which restricts the rotation of the mounting carrier 900 relative to the motor shaft. Specifically, the motor shaft 410 can be a non-circular shaft, meaning its cross-sectional profile can be non-circular. For example, in the embodiment shown, the motor shaft 410 can be a flat shaft, and the through hole of the mounting portion 910 is adapted to the motor shaft 410. After the motor shaft 410 passes through the through hole, the wedge-shaped limiting block 411 can be embedded in the receiving groove 912 to increase the reliability of the mating between the mounting carrier 900 and the motor shaft 410, preventing the mounting carrier 900 from rotating relative to the motor shaft 410. Furthermore, a limiting bolt 412 is threadedly connected to the end of the motor shaft 410. This limiting bolt 412 is located on the side of the mounting carrier 900 facing away from the wheel 300, and it abuts against the mounting portion 910. By providing the limiting bolt 412 on the motor shaft 410, the mounting carrier 900 is clamped between the limiting bolt 412 and the side wall of the wheel 300, thus preventing axial movement of the mounting carrier 900.

[0060] Furthermore, it can be understood that in any connecting arm assembly 800, the first arm 810 is fixedly connected to the first plate-shaped platform 100. Therefore, for the first plate-shaped platform 100, the two first arms 810 fixedly connected to it are respectively connected from both sides of the wheel 300 to the corresponding mounting carriers 900. Thus, when both mounting carriers 900 abut against the sidewalls of the wheel 300, and the two first arms 810 are assembled one-to-one with the two mounting carriers 900, the mounting carriers 900 cannot move axially on the motor shaft 410, resulting in high assembly stability. In other words, even if the limit bolt 412 loosens, the mounting carrier 900 will not shift on the motor shaft 410, thereby improving the stability of the connection between the mounting carrier 900 and the motor shaft 410.

[0061] Optionally, such as Figure 5 and Figure 6As shown, in the unfolded state, the second arm 820 of any connecting arm assembly 800 abuts against the motor shaft 410 to limit the second arm 820 and thus position the electric vehicle 10 in the unfolded state. Specifically, a limiting groove 821 is provided on the end of the second arm 820 away from the second plate-shaped platform 200. The limiting groove 821 is located on the side of the end of the second arm 820 facing the motor shaft 410. During the process of the electric vehicle 10 changing from the folded state to the unfolded state, the second arm 820 rotates continuously in a single rotational direction relative to the first arm 810 until the end of the motor shaft 410 abuts against the limiting groove 821. The second arm 820 can no longer continue to rotate relative to the first arm 810. At this time, the electric vehicle 10 is in the unfolded state. That is, the limiting groove 821 and the motor shaft 410 limit the electric vehicle 10 to remain in the unfolded state.

[0062] In some embodiments, such as Figure 1-3 As shown, the width of the first plate platform 100 and the second plate platform 200 in the direction parallel to the motor shaft 410 is equal, and the lateral width of the wheel 300 is basically equal to the width of the first plate platform 100 / the second plate platform 200. This makes the structural layout of the electric vehicle 10 reasonable, so that the wheel 300 does not occupy too much space while the width of the tire is set as large as possible, thereby increasing the stability of the user when riding the electric vehicle 10.

[0063] In some embodiments, such as Figure 1 As shown, when the electric vehicle 10 is in the unfolded state, the longitudinal axis A of at least a portion of the first plate-shaped platform 100 and the longitudinal axis B of at least a portion of the second plate-shaped platform 200 coincide with each other. When riding, the user's first foot steps on the portion of the first plate-shaped platform 100 where the longitudinal axis A coincides with the longitudinal axis B of the second plate-shaped platform 200, and the user's second foot steps on the portion of the second plate-shaped platform 200 where the longitudinal axis B coincides with the longitudinal axis A of the first plate-shaped platform 100. In the folded state, at least a portion of the first plate-shaped platform 100 and at least a portion of the second plate-shaped platform 200 are in contact with each other, thereby bringing the first plate-shaped platform 100 and the second plate-shaped platform 200 as close as possible in the folded state of the electric vehicle 10. It is understood that when the stepping surface 1000 of the first plate-shaped platform 100 and the stepping surface 1000 of the second plate-shaped platform 200 are both completely flat, the longitudinal axis A of the first plate-shaped platform 100 and the longitudinal axis B of the second plate-shaped platform 200 are completely coincident in the unfolded state of the electric vehicle 10, and the first plate-shaped platform 100 and the second plate-shaped platform 200 are completely fitted together in the folded state of the electric vehicle 10.

[0064] In some embodiments, such as Figure 5As shown, the first plate-shaped platform 100 is fixedly connected to the motor shaft 410, and the second plate-shaped platform 200 is rotatably connected to the first plate-shaped platform 100. The controller 700 is located inside the first plate-shaped platform 100, and the power supply 500 is located inside the second plate-shaped platform 200. The power supply 500 is connected to the controller 700 by a first cable 1100a, and the controller 700 is connected to the motor 400 by a second cable 1100b. That is, the power supply 500 is only connected to the controller 700 by the first cable 1100a, while the controller 700 is connected to both the power supply 500 and the motor 400 by the first cable 1100a. Obviously, there are more cables coming out of the controller 700. Therefore, the controller 700 is placed in the first plate-shaped platform 100 fixed to the motor 400, rather than in the rotatable second plate-shaped platform 200. This is because the more cables coming out of the second plate-shaped platform 200, the greater the interference that the rotation of the second plate-shaped platform 200 may cause, or the rotation itself may have an adverse effect on the lifespan of the cables.

[0065] Furthermore, the first cable 1100a connecting the power supply 500 and the controller 700 extends from the side of the first plate-shaped platform 100 toward the second plate-shaped platform 200, and enters the second plate-shaped platform 200 from the side of the second plate-shaped platform 200 toward the first plate-shaped platform 100. Let the length of the portion of the first cable 1100a located between the first plate-shaped platform 100 and the second plate-shaped platform 200 be a first length, and let the distance between the first plate-shaped platform 100 and the second plate-shaped platform 200 of the electric vehicle 10 in the unfolded state be a first distance. The value of the first distance is less than the value of the first length, so that when the electric vehicle 10 changes between the folded and unfolded states, the first cable 1100a will not be pulled and broken or damaged.

[0066] In some embodiments, such as Figure 5 and Figure 6As shown, cable storage boxes 1200 are provided on both sides of the wheel 300. The cable storage boxes 1200 are connected to the first arm 810 and are used to store cables for easy cable organization. Specifically, the cable storage box 1200 has a storage cavity 1210 on the side facing the wheel 300, and a wire-passing groove 1220 is provided on each side of the cable storage box 1200. Each wire-passing groove 1220 communicates with the storage cavity 1210. One of the two wire-passing grooves 1220 is located near the first plate-shaped platform 100, and the other is located near the second plate-shaped platform 200. When the controller 700 is located in the first plate-shaped platform 100 and the power supply 500 is located in the second plate-shaped platform 200, the first cable 1100a connecting the controller 700 and the power supply 500 is led out from the first plate-shaped platform 100, passes through the cable groove 1220 near the first plate-shaped platform 100 into the storage cavity 1210, and then exits from the cable groove 1220 near the second plate-shaped platform 200 and enters into the second plate-shaped platform 200; the first cable 1100b connecting the controller 700 and the motor 400 is led out from the first plate-shaped platform 100, passes through the cable groove 1220 near the first plate-shaped platform 100 into the storage cavity 1210, and then passes through the inner cavity of the motor shaft 410 into the motor 400. Preferably, the first cable 1100a connecting the controller 700 and the power supply 500 and the first cable 1100b connecting the controller 700 and the motor 400 are respectively routed on both sides of the wheel 300, that is, the two cables are respectively stored in the cable storage boxes 1200 on both sides of the wheel 300.

[0067] Furthermore, such as Figure 3 , Figure 5 as well as Figure 12 As shown, a support frame 1300 is provided between the two first arms 810 on both sides of the wheel 300. This support frame 1300 serves as a support member to contact the placement surface 1400 and hold the electric vehicle 10 upright when it is in a folded state. By providing the support frame 1300, firstly, it facilitates the user's placement and storage of the electric vehicle 10, preventing it from being placed haphazardly when not in use; secondly, the support frame 1300 supports the electric vehicle 10, preventing the wheel 300 from directly contacting the placement surface 1400, thus avoiding the problem of unclean wheels from the used electric vehicle 10 contaminating the placement surface 1400. The placement surface 1400 can be the ground, a tabletop, or the bottom of a storage box, etc.

[0068] Specifically, such as Figure 12As shown, the support frame 1300 is U-shaped and is wrapped around one side of the wheel 300, located between the second plate-shaped platform 200 and the wheel 300. The two ends of the support frame 1300 are located on both sides of the vehicle and are fixedly connected to the two first arms 810 respectively. For example, the ends of the support frame 1300 are connected to the first arms 810 by screws. The portions of the support frame 1300 located on both sides of the wheel 300 each have a fixing part 1320. Each fixing part 1320 corresponds to one of the two cable storage boxes 1200, and each cable storage box 1200 is connected to its corresponding fixing part 1320. For example, the cable storage box 1200 is fixedly connected to the fixing part 1320 by screws. The side of the support frame 1300 facing away from the second wheel 300 is the support surface 1310. When the electric vehicle 10 is in a folded state, the second plate platform 200 is rotated to abut against the first plate platform 100. At this time, the second plate platform 200 is located on the side of the support frame 1300 facing away from the support surface 1310. The user can make the support surface 1310 fit against the placement surface 1400 so that the electric vehicle 10 is in a stored state. At this time, the wheel 300, the first plate platform 100 and the second plate platform 200 are all located on the side of the support frame 1300 facing away from the placement surface 1400, and the electric vehicle 10 is in a roughly upright state.

[0069] Optionally, such as Figure 3 As shown, the support frame 1300 is configured such that its support surface 1310 is inclined relative to the first plate-shaped platform 100. When the electric vehicle 10 is in the aforementioned stowed state, the first plate-shaped platform 100 and the second plate-shaped platform 200 are also inclined, so that the center of gravity of the entire electric vehicle 10 can fall within the support surface 1310. Optionally, when the electric vehicle 10 is in the aforementioned stowed state, the angle between the first plate-shaped platform 100 and the vertical plane is 5°, at which point the center of gravity line of the entire electric vehicle 10 falls within the support surface 1310.

[0070] Furthermore, such as Figure 1As shown, a protective element 1500 is wrapped around the tire. A support connection part 120 is connected to the side of the first plate-shaped platform 100 facing the wheel 300. The support connection part 120 is arranged parallel to the motor shaft 410. The edge of the protective element 1500 facing the first plate-shaped platform 100 is connected to the support connection part 120 to fix the protective element 1500 to the first plate-shaped platform 100. The protective element 1500 is located on both sides of the wheel 300 and is connected to two fixing parts 1320 respectively, thereby further fixing the protective element 1500 and increasing the stability of the protective element 1500. The protective element 1500 is roughly square in shape with its ends connected. The hollow part in the middle is used to make way for the wheel 300, so that the protective element 1500 can be arranged around the wheel 300, and the wheel 300 passes through the protective element. The protective element 1500 includes two opposing baffles 1510. One baffle 1510 is located between the wheel 300 and the first plate-shaped platform 100, and the other baffle 1510 is located between the wheel 300 and the second plate-shaped platform 200. When the electric vehicle 10 is in the unfolded state, the lower end of the baffle 1510 near the first plate-shaped platform 100 is flush with the foot surface of the first plate-shaped platform 100, and the upper end extends upward along the surface of the wheel 300 by a certain width. The lower end of the baffle 1510 near the second plate-shaped platform 200 is flush with the second top surface, and the upper end extends upward along the surface of the wheel 300 by a certain width. By providing the protective element 1500, the two baffles 1510 located on both sides of the wheel 300 can protect the wheel 300, preventing the user's feet from touching the wheel 300 during riding, thus avoiding any impact on riding or safety hazards. Furthermore, the baffles 1510 can also prevent sewage from splashing directly onto the user's feet or legs.

[0071] In some embodiments, such as Figure 2 and Figure 4 As shown, the first plate-shaped platform 100 is provided with a first handle portion 110, which is located at the end of the first plate-shaped platform 100 away from the wheel 300. The second plate-shaped platform 200 is provided with a second handle portion 220, which is located at the end of the second plate-shaped platform 200 away from the wheel 300. Both the first handle portion 110 and the second handle portion 220 are used for the user to hold the electric vehicle 10.

[0072] Specifically, the first handle portion 110 is a through slot penetrating the first plate-shaped platform 100, and the second handle portion 220 is a groove provided on the second bottom surface. In this way, when the power supply 500 is installed in the second plate-shaped platform 200, by making the second handle portion 220 a groove, the second handle portion 220 can avoid occupying the arrangement space of the power supply 500, thereby allowing the power supply 500 to be set larger, that is, a power supply 500 with a higher energy storage capacity can be installed.

[0073] In some embodiments, the weights of the first plate-shaped platform 100 and the second plate-shaped platform 200 are unequal, resulting in unequal weight distribution on both sides of the wheel 300 when the electric vehicle 10 is in the unfolded state. Therefore, when the electric vehicle 10 is placed on a horizontal surface and not subjected to external force, the first plate-shaped platform 100 and the second plate-shaped platform 200 can rotate spontaneously simultaneously. The heavier of the two platforms will rotate towards the horizontal surface, while the lighter one will rotate away from it. The heavier platform will eventually contact the ground, while the lighter one will eventually be raised off the ground. This facilitates user access and riding; the user can place one foot on the platform that is in contact with the ground and then place the other foot on the platform that is not in contact with the ground.

[0074] In some embodiments, such as Figure 6 As shown, the first plate-shaped platform 100 is fixedly connected to the motor shaft 410 via the first arm 810, and the second plate-shaped platform 200 is rotatably connected to the first plate-shaped platform 100 via the second arm 820, with the rotation centers of the first arm 810 and the second arm 820 located directly above the motor shaft 410. The weight of the second plate-shaped platform 200 is greater than the weight of the first plate-shaped platform 100. Thus, when the electric vehicle 10 is in the unfolded state and placed on a horizontal surface without external force, the end of the second plate-shaped platform 200 away from the wheel 300 will abut against the ground, while the end of the first plate-shaped platform 100 away from the wheel 300 will tilt upwards relative to the ground. Since the rotation centers of the first arm 810 and the second arm 820 are located directly above the motor shaft 410, when the user steps on one of their feet onto the second plate platform 200, the external force exerted on the wheel 300 by the rotation axis of the first arm 810 and the second arm 820 is relatively small. As a result, the wheel 300 is not easy to move on the ground, and the first plate platform 100 is not easy to tilt.

[0075] Furthermore, such as Figure 4As shown, the power supply 500 is located within the second plate-shaped platform 200, and the controller 700 is located within the first plate-shaped platform 100. A photoelectric switch 1600, electrically connected to the controller 700, is located within the first plate-shaped platform 100. When the photoelectric switch 1600 senses that the user's foot is stepping onto the footing surface 1000 of the second plate-shaped platform 200, the controller 700 receives the sensing signal from the photoelectric switch 1600 and controls the motor 400 to start. Since the weight of the first plate platform 100 is less than that of the second plate platform 200, when the electric vehicle 10 is in the unfolded state and placed on a horizontal ground without being subjected to external force, the end of the second plate platform 200 away from the wheel 300 will be in contact with the ground, while the end of the first plate platform 100 away from the wheel 300 will be tilted upward relative to the ground. At this time, the user can first place his first foot on the second plate platform 200 and then place his second foot on the first plate platform 100. After the second foot is placed on the first plate platform 100, the photoelectric switch 1600 senses the second foot and controls the motor 400 to start.

[0076] Furthermore, the electric vehicle 10 can also have a novice mode and an expert mode. In expert mode, when the photoelectric switch 1600 senses that the user's foot has stepped onto the first platform 100, the controller 700 will control the motor 400 to immediately drive the wheels 300, thus providing the user with a certain riding pleasure. In novice mode, after the photoelectric switch 1600 senses that the user's foot has stepped onto the first platform 100, the controller 700 will only control the motor 400 to drive the wheels 300 when the sensor 600 senses that the second platform 200 has been stepped on to a roughly horizontal position, in order to prevent the user from losing balance and being unable to use the electric vehicle 10 properly.

[0077] In some embodiments, such as Figure 1 As shown, when the electric vehicle 10 is in the unfolded state, the foot surfaces 1000 of the first plate-shaped platform 100 and the second plate-shaped platform 200 are coplanar. This ensures a good riding experience for the user and prevents the user from perceiving a difference in height between the first plate-shaped platform 100 and the second plate-shaped platform 200. Furthermore, the axis of rotation of the first plate-shaped platform 100 relative to the second plate-shaped platform 200 is parallel to the motor shaft 410. In the unfolded state, this axis of rotation is located either within the plane of the foot surface 1000 or above the plane of the foot surface 1000, to avoid the axis of rotation coinciding with the motor shaft 410 and interfering with the folding between the first plate-shaped platform 100 and the second plate-shaped platform 200.

[0078] Optionally, when the electric vehicle 10 is in the unfolded state, the axis of rotation between the first plate-shaped platform 100 and the second plate-shaped platform 200 is simultaneously located in the plane containing the step surface 1000 of the first plate-shaped platform 100 and the step surface 1000 of the second plate-shaped platform 200. Thus, when the electric vehicle 10 in the unfolded state is folded, the step surface 1000 of the first plate-shaped platform 100 and the step surface 1000 of the second plate-shaped platform 200 can fit together, thereby making the electric vehicle 10 occupy less space in the folded state.

[0079] In some embodiments, there is only one sensor 600. Since the electric vehicle 10 is in an unfolded state when the user rides it, the postures of the first plate-shaped platform 100 and the second plate-shaped platform 200 change simultaneously and by the same magnitude during riding. Therefore, in this embodiment, only one sensor 600 is needed to satisfy the requirement of sensing the postures of the first plate-shaped platform 100 and the second plate-shaped platform 200, while also saving production costs.

[0080] In some embodiments, there is one controller 700, which receives the attitude signal sent by the sensor 600 to control the motor 400 to drive the wheels 300. This satisfies the control requirements of the electric vehicle 10 and also saves production costs.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An electric vehicle, characterized in that, include: A first plate-shaped platform and a second plate-shaped platform, each of the first plate-shaped platform and the second plate-shaped platform having a stepping surface; Wheels and motors installed within the wheels; The power source that powers the electric vehicle; At least one sensor is used to sense the attitude of at least one of the first plate-shaped platform and the second plate-shaped platform and generate a corresponding attitude signal; At least one controller communicatively connected to the motor and the at least one sensor, which is used to control the motor to drive the wheel based on the attitude signal; as well as Two connecting arm assemblies are arranged opposite to each other. Each connecting arm assembly includes two arms that are rotatably connected to each other. The first arm and the second arm of the two arms of each connecting arm assembly are respectively fixedly connected to the first plate-shaped platform and the second plate-shaped platform. The electric vehicle is configured to change between an unfolded state and a folded state. In the unfolded state, the wheels are positioned substantially centrally between the first plate-shaped platform and the second plate-shaped platform, and the step surfaces of the first plate-shaped platform and the second plate-shaped platform are oriented to be stepped on by the user's first and second feet, respectively. In the folded state, the first plate-shaped platform and the second plate-shaped platform are closer to each other than when they are in the unfolded state. Each of the two connecting arm assemblies has a first locking member disposed on its first arm and a second locking member disposed on its second arm. The first locking member and the second locking member are configured to cooperate in performing a locking operation that can be revoked by the user. The first locking member is an elastic limiting component, and the second locking member is a limiting groove. The end of the elastic limiting component near the second arm can be embedded in the limiting groove under its own elastic force to lock the electric vehicle in the current state when the electric vehicle is in the unfolded state or the folded state. At least one of the first plate platform and the second plate platform is configured to be able to drive the elastic limiting component to overcome its own elastic force and disengage from the limiting groove when the user applies external force, so as to revoke the mutual locking between the first arm and the second arm and enable the first arm to rotate relative to the second arm. The elastic limiting assembly includes a fixed post, a spring, and a locking engagement member connected in sequence. The fixed post is connected to the first arm. The end of the locking engagement member away from the spring tends to move towards the second arm under the elastic force of the spring. The locking engagement member includes a connecting part, a limiting plate, and a limiting post connected in sequence. The end of the spring away from the fixed post is connected to the connecting part. The connecting part is columnar. The limiting plate is disc-shaped, and the central axis of the limiting plate coincides with the central axis of the connecting part. A fixed plate is connected to the first arm. The fixed plate is located on the side of the first arm away from the second arm. The limiting plate is located on the side of the first arm facing the fixed plate. The first arm has a hole corresponding to the limiting groove. The diameter of the limiting plate is larger than the diameter of the hole.

2. The electric vehicle according to claim 1, characterized in that, When the current state of the electric vehicle is an intermediate state, the end of the elastic limiting component near the second arm abuts against the flat surface of the second arm; When at least one of the first plate-shaped platform and the second plate-shaped platform is rotated to change the current state of the electric vehicle from the intermediate state to the unfolded state or the folded state, the end of the elastic limiting component near the second arm is embedded in the limiting groove.

3. The electric vehicle according to claim 1, characterized in that, In any of the connecting arm assemblies, the fixing plate is spaced apart from the first arm; One end of the elastic limiting component is connected to the fixing plate, and the other end passes through the hole.

4. The electric vehicle according to any one of claims 1 to 3, characterized in that, In the unfolded state, at least a portion of the longitudinal axis of the first plate-shaped platform and at least a portion of the longitudinal axis of the second plate-shaped platform coincide with each other, and in the folded state, at least a portion of the first plate-shaped platform and at least a portion of the second plate-shaped platform are in contact with each other.

5. An electric vehicle, characterized in that, include: A first plate-shaped platform and a second plate-shaped platform, each of the first plate-shaped platform and the second plate-shaped platform having a stepping surface; Wheels and motors installed within the wheels; The power source that powers the electric vehicle; At least one sensor is used to sense the attitude of at least one of the first plate-shaped platform and the second plate-shaped platform and generate a corresponding attitude signal; At least one controller communicatively connected to the motor and the at least one sensor, which is used to control the motor to drive the wheel based on the attitude signal; as well as Two connecting arm assemblies are arranged opposite to each other. Each connecting arm assembly includes two arms that are rotatably connected to each other. The first arm and the second arm of the two arms of each connecting arm assembly are respectively fixedly connected to the first plate-shaped platform and the second plate-shaped platform. The electric vehicle is configured to change between an unfolded state and a folded state. In the unfolded state, the wheels are positioned substantially centrally between the first plate-shaped platform and the second plate-shaped platform, and the step surfaces of the first plate-shaped platform and the second plate-shaped platform are oriented to be stepped on by the user's first and second feet, respectively. In the folded state, the first plate-shaped platform and the second plate-shaped platform are closer to each other than when they are in the unfolded state. Each of the two connecting arm assemblies has a first locking member disposed on its first arm and a second locking member disposed on its second arm and configured to cooperate with the first locking member to perform a user-revocable locking operation to lock the electric vehicle in one of the unfolded and folded states in the current state. The first locking member is an elastic limiting component, and the second locking member is a limiting groove. The end of the elastic limiting component near the second arm can be embedded in the limiting groove under its own elastic force. At least one of the first plate-shaped platform and the second plate-shaped platform is configured to be able to drive the elastic limiting component to overcome its own elastic force and disengage from the limiting groove when the user applies an external force, so as to cancel the mutual locking between the first arm and the second arm, allowing the first arm to rotate relative to the second arm. The cooperating first locking member and the second locking member form a locking mechanism. Each of the two connecting arm assemblies is provided with at least two sets of the locking mechanism at intervals; The elastic limiting assembly includes a fixed post, a spring, and a locking engagement member connected in sequence. The fixed post is connected to the first arm. The end of the locking engagement member away from the spring tends to move towards the second arm under the elastic force of the spring. The locking engagement member includes a connecting part, a limiting plate, and a limiting post connected in sequence. The end of the spring away from the fixed post is connected to the connecting part. The connecting part is columnar. The limiting plate is disc-shaped, and the central axis of the limiting plate coincides with the central axis of the connecting part. A fixed plate is connected to the first arm. The fixed plate is located on the side of the first arm away from the second arm. The limiting plate is located on the side of the first arm facing the fixed plate. The first arm has a hole corresponding to the limiting groove. The diameter of the limiting plate is larger than the diameter of the hole.

6. The electric vehicle according to claim 5, characterized in that, Both ends of the motor shaft of the motor are detachably connected to mounting carriers, and the two mounting carriers are connected to the two connecting arm assemblies one by one.

7. The electric vehicle according to claim 6, characterized in that, The first arm of any of the connecting arm assemblies is fixedly connected to the corresponding mounting carrier, and the second arm of any of the connecting arm assemblies is rotatably connected to its first arm.

8. The electric vehicle according to claim 6, characterized in that, When the electric vehicle is in the unfolded state, the second arm of any of the connecting arm assemblies abuts against the motor shaft to limit the rotation of the second arm and thus position the electric vehicle in the unfolded state.

9. The electric vehicle according to claim 7 or 8, characterized in that, In any of the connecting arm assemblies, the second arm and the first arm are rotatably connected by a rotating connector located above the motor shaft, and in the deployed state, the axial direction of the rotating connector is coplanar with both the step surface of the first plate platform and the step surface of the second plate platform.

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