Combined device capable of stably bearing load and intelligently adjusting gravity center for two-wheeled electric vehicle

Abstract

The invention relates to the technical field of two-wheeled electric vehicles, and provides a stable load-bearing and intelligent gravity center adjusting combined device for a two-wheeled electric vehicle, which comprises a frame, a pedal assembly, a battery pack and a storage box. The pedal assembly comprises two pedal plates which can move relatively, form change is achieved through a pedal bearing adjusting structure, the pedal assembly can be adjusted to a funnel-shaped structure from a horizontal state, and the weight bearing stability is greatly improved. The battery pack is provided with a gravity center adjusting device which comprises a sliding power structure and a supporting sliding structure, a motor drives a synchronous belt for transmission, the battery pack is driven to move in the driving direction of the electric vehicle, and the vehicle gravity center position is optimized in real time. The storage box is provided with a gravity center avoiding structure and comprises an avoiding notch, a semi-closed movable frame and a movable telescopic assembly, and the storage space can be maximized while free movement of the battery pack is guaranteed. Through organic integration of a plurality of functional parts, the bearing capacity, the driving stability and the storage function of the electric vehicle are comprehensively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of two-wheeled electric vehicles, and particularly to a combined device for stable load bearing and intelligent center-of-gravity adjustment for two-wheeled electric vehicles, aiming to solve the technical problems of insufficient stability when carrying heavy objects and uneven center-of-gravity distribution affecting driving safety and comfort in existing two-wheeled electric vehicles. Background Art

[0002] With the increasingly serious urban traffic congestion problem and the continuous improvement of environmental awareness, two-wheeled electric vehicles have gradually become an important choice for residents' short-distance travel and light cargo transportation due to their environmental protection, convenience, economy and other advantages. However, existing two-wheeled electric vehicles still face many technical bottlenecks in practical applications, especially the deficiencies in load bearing and driving stability, which severely restrict the expansion of their functions and the improvement of the user experience.

[0003] Most two-wheeled electric vehicles on the market currently adopt a fixed flat pedal design. Although it can meet the basic foot support requirements, when carrying heavier or larger items, the items often shake or even fall due to limited support area and unstable structure, posing a greater safety hazard. At the same time, this design lacks the adaptability to different-shaped items and cannot provide a stable and reliable support environment for various heavy objects.

[0004] In terms of the center-of-gravity distribution of electric vehicles, traditional designs usually fixedly install the battery pack at a specific position on the vehicle frame and cannot be adjusted according to the load conditions and road conditions. This rigid layout will form completely different center-of-gravity distributions in the unloaded and fully loaded states, resulting in inconsistent vehicle handling performance. Especially in complex road conditions such as uphill, downhill or sharp turns, safety accidents such as center-of-gravity deviation, side slip or even rollover are likely to occur.

[0005] In addition, the storage space design of existing two-wheeled electric vehicles is often independent of other functional components, lacking overall planning and coordinated consideration. This fragmented design leads to low space utilization rate and is difficult to achieve the organic integration of functions, and it is impossible to simultaneously meet the dual requirements of large-capacity storage and flexible performance adjustment within the limited vehicle body space.

[0006] Existing technical attempts have improved the load-bearing stability of electric vehicles by adding auxiliary wheels or extending support frames, but these solutions often increase the overall weight and volume of the vehicle, reducing its mobility and flexibility. There are also studies exploring the design of electric vehicles with adjustable center of gravity, but most are limited to simple mechanical adjustments, lacking intelligent perception and automatic control capabilities, with poor user experience and limited adjustment accuracy.

[0007] Therefore, an innovative technical solution is needed to achieve flexible changes in the form of the pedal assembly to improve the stability of heavy object loading without affecting the basic performance of the electric vehicle; at the same time, it has intelligent center-of-gravity adjustment ability to automatically optimize the center-of-gravity distribution according to the load condition and road condition changes; and it can realize the coordinated operation of the storage function and the center-of-gravity adjustment function within a limited space, so as to comprehensively improve the comprehensive use value and user experience of the two-wheeled electric vehicle. Summary of the Invention

[0008] To solve the technical problems of insufficient stability when carrying heavy objects in existing two-wheeled electric vehicles and uneven center-of-gravity distribution affecting the driving experience, the present invention provides a combined device for stable load bearing and intelligent center-of-gravity adjustment for two-wheeled electric vehicles.

[0009] The technical solution of the present invention is as follows: A combined device for stable load bearing and intelligent center-of-gravity adjustment for two-wheeled electric vehicles, comprising a frame; a pedal assembly mounted on the frame, the pedal assembly including two relatively movable pedal plates, and a pedal load-bearing adjustment structure is provided between the two pedal plates; a battery pack movably mounted on the frame, the battery pack is provided with a center-of-gravity adjustment device for driving the battery pack to move along the driving direction of the electric vehicle; a storage box mounted on the frame, the storage box includes a box body connecting part and a box body extending part arranged from bottom to top, and the box body connecting part is provided with a center-of-gravity avoidance structure, which cooperates with the center-of-gravity adjustment device to make room for the displacement of the battery pack.

[0010] The pedal load-bearing adjustment structure of the present invention includes: a gear-rack assembly, including a gear in the center and racks on both sides, one end of the rack is connected to the pedal plate through a connecting pin; a support adjustment plate, the gear-rack assembly is fixed at the center position of the support adjustment plate through a mounting box, and support shafts are arranged on both sides of the support adjustment plate, and the support shafts pass through the strip-shaped movable holes on the pedal plate, so that the pedal plate can slide on the support shaft; a stepped adjustment platform, located on the support adjustment plate, divided into three-level structures; and an operation knob, inserted into the center of the gear and exposed outside the pedal assembly.

[0011] When the pedal plate abuts against the first level of the stepped adjustment platform, the pedal assembly is in a horizontal state; when the pedal plate moves to the second or third level, the two pedal plates form an inclined funnel-shaped structure from the outside to the middle, which is used to improve the stability of heavy object loading.

[0012] Two pressure sensors are arranged below the support adjustment plate of the present invention, respectively located on both sides of the support adjustment plate, for monitoring the weight borne by the pedal plate and providing data support for the center-of-gravity adjustment device.

[0013] The center of gravity adjustment device of the present invention includes: a sliding power structure, which is arranged in the middle position of the lower end of the battery pack, including a connecting bracket, a motor assembly, a transmission assembly and a connecting assembly, wherein the transmission assembly adopts a synchronous belt transmission method, including a driving wheel, a driven wheel and a synchronous belt connecting the two wheels, and the linear transmission direction of the synchronous belt is consistent with the linear direction of travel of the electric vehicle; the connecting assembly includes two connecting driving blocks, one end of the connecting driving block is connected to the synchronous belt, and the other end is connected to the lower end of the battery pack; and a supporting sliding structure, which is arranged on both sides of the battery pack, including supporting sliding rails, and the supporting sliding rails are symmetrically arranged on both sides of the sliding power structure and connected to the lower end of the battery pack.

[0014] The center of gravity avoidance structure of the present invention comprises: a clearance notch formed on the side of the box-body connection portion near the battery pack; a semi-enclosed movable frame shaped to correspond to the clearance notch and connected to the inner wall of the box-body connection portion via a sliding mechanism; and a movable telescopic assembly connecting the semi-enclosed movable frame to the fixed portion of the box-body connection portion, comprising a first component rod sleeve, a second component rod sleeve, and a telescopic spring connecting the two. A rotatably hinged isolation plate is provided above the clearance notch in the box-body connection portion to separate the interior space of the storage box from the upper end of the battery pack.

[0015] A protective box is provided on the outside of the battery pack of the present invention, and ventilation and heat dissipation holes are provided on the box.

[0016] The present invention also includes a control system for calculating the optimal battery pack position based on weight data monitored by the pressure sensor and controlling the center of gravity adjustment device to move the battery pack to the calculated optimal position. This control system automatically adjusts the battery pack position based on detected road conditions: on uphill sections, the battery pack is moved rearward to increase rear wheel grip; on downhill sections, the battery pack is moved forward to optimize braking effectiveness; and when turning, the battery pack position is fine-tuned based on the direction and angle of the turn to improve cornering stability.

[0017] The combined device for stable load-bearing and intelligent center of gravity adjustment for a two-wheeled electric vehicle provided by the present invention has the following beneficial effects: By setting up relatively movable pedal blocks and pedal load-bearing adjustment structures, flexible changes in the shape of the pedal assembly are achieved, especially the transition from a horizontal state to a funnel-shaped structure, which significantly improves the stability and safety of the electric vehicle when carrying heavy objects, and solves the problem of insufficient carrying capacity of existing two-wheeled electric vehicles.

[0018] The innovatively designed center of gravity adjustment device can automatically or manually adjust the position of the battery pack in the direction of travel of the electric vehicle according to the load and road conditions, thereby optimizing the overall center of gravity distribution of the electric vehicle and significantly improving the controllability, stability and driving safety of the electric vehicle.

[0019] The unique center of gravity avoidance structure cleverly solves the conflict between battery pack movement and storage box space utilization. Through the coordinated work of the clearance gap, semi-enclosed mobile frame and mobile telescopic components, it maximizes the utilization of storage space while ensuring the center of gravity adjustment function.

[0020] The installed pressure sensor not only prevents the pedal assembly from being overloaded, but also provides key data support for the center of gravity adjustment system. Through dual-point data collection, it improves monitoring accuracy and reliability and realizes the intelligent linkage between load monitoring and center of gravity adjustment.

[0021] The system can automatically adjust the position of the battery pack according to different road conditions such as uphill, downhill and turning, increase the grip of the rear wheel when going uphill, optimize the braking effect when going downhill, and improve stability when turning, realizing intelligent adaptation to all-weather road conditions, greatly improving the safety and driving experience of electric vehicles in complex environments.

[0022] The rotating hinged isolation plate design ensures complete isolation between the items in the storage box and the battery pack, effectively preventing the potential impact of the items in the storage box on the performance and safety of the battery pack, and improving the safety and reliability of the entire system.

[0023] This invention integrates multiple functional innovations. Through the organic integration of the pedal load-bearing adjustment structure, the center of gravity adjustment device and the center of gravity avoidance structure, it achieves a perfect balance between the electric vehicle's load-bearing performance, storage function and control experience, greatly improving the comprehensive use value of the two-wheeled electric vehicle.

[0024] Through the coordination of the intelligent control system, the present invention achieves static optimization and dynamic balance of the center of gravity of the electric vehicle, can be adjusted in real time according to the riding status, provides a personalized riding experience, and meets the usage needs of different users in various complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention when the pedal assembly is removed; Figure 3 This is a schematic diagram of the disassembled structure of the footrest assembly and the upper load-bearing adjustment structure of the present invention; Figure 4 A schematic diagram of the structure of the gear rack and the operating knob of the present invention; Figure 5 for Figure 3 A partial enlarged view of point Ⅰ in the middle; Figure 6 is a cross-sectional view of the footrest assembly of the present invention in a horizontal state at the first level; Figure 7 is a cross-sectional view of the footrest assembly of the present invention at the second stage; Figure 8 is a cross-sectional view of the footrest assembly of the present invention at the third stage; Figure 9 This is a schematic diagram of the structure of the storage box of the present invention for shifting and avoiding the battery pack; Figure 10 This is a schematic diagram of the planar structure of the storage box of the present invention for shifting and avoiding the battery pack; Figure 11 It is a structural schematic diagram of the center of gravity adjustment device of the present invention; Figure 12 This is a schematic diagram of the disassembled structure of the storage box and its upper center of gravity avoidance structure of the present invention; Figure 13 This is a schematic structural diagram of Example 2 of the present invention; Figure 14 Schematic diagram of the positions of the damping element, battery pack, etc.

[0026] Figures 10, pedal assembly 20, battery pack 30, storage box 40, pedal load-bearing adjustment structure 50, center of gravity adjustment device 60, center of gravity avoidance structure 70, pressure sensor 80, steering support frame 11, main support tube 12, mounting support frame 13, footrest assembly 14, connecting fixing frame 15, battery pack box 16, battery mounting portion 131, connecting support portion 132, ventilation and heat dissipation holes 161, pedal block 21, strip-shaped movable hole 211, box connecting portion 41, box extension portion 42, gear rack assembly 51, support adjustment plate 52, stepped adjustment platform 53, operating knob 54, mounting box 55, gear 511, rack 512, connecting pin 513, support shaft 521 , first stage 531, second stage 532, third stage 533, sliding power structure 61, supporting sliding structure 62, connecting bracket 611, motor assembly 612, transmission assembly 613, connecting assembly 614, driving wheel 6131, driven wheel 6132, synchronous belt 6133, connecting driving block 6141, supporting sliding rail 621, making way gap 71, semi-enclosed moving frame 72, moving telescopic assembly 73, isolation plate 74, first component rod sleeve 731, second component rod sleeve 732, front wheel deflector 110a, water collection channel 110b, water storage tank 111a, multi-directional injection port 116, electromagnetic control valve 113c, damping element 113a, pressure sensor 113b. DETAILED DESCRIPTION

[0027] Example 1: refer to Figures 1 - 2, this embodiment provides a combined device for stable load bearing and intelligent center of gravity adjustment for two-wheel electric vehicles, including a vehicle frame 10, a footrest assembly 20, a battery pack 30, and a storage box 40, all of which are installed on the vehicle frame 10. The vehicle frame 10 includes a steering support frame 11, a main support pipe 12, a mounting support frame 13, and a footrest assembly 14. The steering support frame 11 is located at the front part of the electric vehicle and provides support for the steering assembly of the electric vehicle. The main support pipe 12 is made of a hollow steel pipe with a diameter of 30-40 mm, and it is used to connect the steering support frame 11 and the mounting support frame 13. The mounting support frame 13 extends from the middle part of the electric vehicle to the rear of the vehicle, and forms a battery installation part 131 for installing the battery pack 30 and a connection support part 132 for supporting the seat part and the rear of the electric vehicle. Among them, the battery pack 30 is movably installed in the battery installation part 131, the footrest assembly 20 is connected to the battery installation part 131 through a connection fixing frame 15 and is located above the battery pack 30, and the storage box 40 is installed on the connection support part 132 and is located below the seat part. The storage box 40 extends downward to the battery pack 30.

[0028] Reference Figures 1 - 12 , the combined device for stable load bearing and intelligent center of gravity adjustment is used to expand the form of the footrest assembly 20 of the two-wheel electric vehicle, improve its stability after carrying heavy objects, and intelligently adjust the center of gravity position of the electric vehicle according to the carried heavy objects, optimize the controllability and stability of the electric vehicle during driving, and improve the driving experience. The core functional implementation structure of the device includes: the footrest assembly 20 includes two relatively movable footrest plates 21, and a pedal load-bearing adjustment structure 50 is arranged between the two footrest plates 21 for changing the form of the pedal assembly to make the load bearing of heavy objects more stable; the battery pack 30 is provided with a center of gravity adjustment device 60. The system can calculate the optimal position of the battery pack 30 according to the load-bearing of the pedal assembly and the optimal center of gravity position, or determine the optimal position of the battery pack 30 through manual judgment, and drive the battery pack 30 to move along the driving direction of the electric vehicle through this device to adjust the overall center of gravity position of the electric vehicle; the storage box 40 includes a box body connection part 41 and a box body extension part 42 arranged from bottom to top. The box body connection part 41 is provided with a center of gravity avoidance structure 70, which cooperates with the center of gravity adjustment device 60 to make room for the displacement of the battery pack 30 and ensure that the electric vehicle can realize the center of gravity adjustment function.

[0029] Reference Figures 3 - 7 , the pedal load-bearing adjustment structure 50 mainly consists of four core parts: a gear and rack assembly 51, a support adjustment plate 52, a stepped adjustment table 53, and an operation knob 54.

[0030] The gear and rack assembly 51 is the driving mechanism of the whole structure. As Figure 4 shown, it includes a circular gear 511 in the center and straight racks 512 on both sides. One end of the rack is connected through a connecting pin 513 ( Figure 4The middle and bottom part is visible) is connected to the foot pedal plate 21, enabling the rack to drive the foot pedal to move.

[0031] The support adjustment plate 52 ( Figure 3 The middle part is visible) is the basic support plate of the entire pedal load-bearing adjustment structure. The gear-rack assembly 51 is fixed at the center position of the support adjustment plate 52 through the mounting box 55 ( Figure 3 visible in). Figure 3 It is also shown that support shafts 521 are provided on both sides of the support adjustment plate 52. These support shafts 521 pass through the strip-shaped movable holes 211 on the foot pedal plate 21, enabling the foot pedal plate 21 to slide on the support shafts 521.

[0032] The stepped adjustment platform 53 is located on the support adjustment plate 52 and is divided into three stepped structures (such as Figure 5 the enlarged view shows 531, 532, 533). Figure 6 and Figure 7 and Figure 8 show cross-sectional views in different working states: when the foot pedal plate abuts against the first stage 531, the foot pedal assembly is in a horizontal state; when the foot pedal plate moves to the second stage 532 or the third stage 533, the two foot pedals form an inclined "funnel-shaped" structure from the outside to the middle. This form can more stably carry heavy objects.

[0033] The operation knob 54 ( Figure 3 and Figure 4 visible at the top) is the interface for user operation. It is inserted into the center of the gear and exposed outside the foot pedal assembly 20. By rotating the operation knob 54, the user can drive the gear 511 to rotate, and the gear 511 drives the racks 512 on both sides to move in opposite directions, thereby synchronously adjusting the positions of the two foot pedal plates 21.

[0034] The working principle of the entire pedal load-bearing adjustment structure 50 is as follows: the user rotates the operation knob 54, driving the central gear 511 to rotate. The gear 511 drives the racks 512 on both sides to move in opposite directions. The racks 512 drive the foot pedal plate 21 to move through the connecting pins 513. When the foot pedal plate 21 moves, with the cooperation of the support shafts 521 and the strip-shaped movable holes 211, they can switch positions at different levels of the stepped adjustment platform 53, thereby changing the form of the foot pedal plate 21, enabling it to be adjusted to a horizontal state or form a funnel-shaped structure with different degrees according to the need to carry heavy objects, enhancing the load-bearing stability.

[0035] Two pressure sensors 80 ( Figure 3 visible at the bottom) are also provided below the support adjustment plate, used to monitor the weight borne by the foot pedal plate 21, which can not only prevent overloading but also provide data support for the center of gravity adjustment system.

[0036] The plug-in shape of the operating knob 54 can be an arcuate shape, a polygonal shape, etc.

[0037] To further enhance the intelligent load-bearing capabilities of the pedal assembly 20, the pressure sensor 80 performs a dual function: Firstly, it prevents overloading of the pedal assembly 20 and transmits monitored data to the control system, which analyzes and issues prompts to the user, suggesting adjustments to the pedal assembly 20 for optimal load-bearing conditions; secondly, it provides critical data support for the center of gravity adjustment device 60, which is used to calculate the optimal position of the battery pack 30. In this embodiment, two pressure sensors 80 are provided, one on either side of the support adjustment plate 52, enhancing monitoring accuracy and reliability through dual-point data collection.

[0038] The pedal load-bearing adjustment mechanism 50 operates as follows: The user rotates the operating knob 54, which rotates the central gear 511. This meshes with the central gear 511 and drives the two racks 512 in opposite directions. The racks 512, via the connecting pin 513 and the pinhole structure, drive the two pedal blocks 21 to move accordingly, allowing the pedal blocks 21 to move closer or further away from each other. During this process, the support shaft 521 slides synchronously within the strip-shaped movable hole 211 in the pedal block 21 to match the movement trajectory of the pedal block 21. By controlling the displacement of the racks 512, the pedal block 21 can be switched between the first level 531, the second level 532, and the third level 533 of the stepped adjustment platform 53. This allows the pedal assembly 20 to be adjusted to the most suitable support configuration based on the weight configuration or real-time weight data detected by the pressure sensor 80, significantly improving the stability and safety of the load.

[0039] refer to Figures 9 - 11 The center of gravity adjustment device 60 is provided at the lower end of the battery pack 30 and is composed of two parts: a sliding power structure 61 and a supporting sliding structure 62. Figure 9 and Figure 10 As shown, the battery pack 30 is located above the device, and the center of gravity adjustment device 60 provides support and movement functions below the battery pack 30.

[0040] The sliding power structure 61 is the core driving mechanism of the gravity center adjustment device 60 and is located in the middle of the battery pack 30. Figure 11 Shown in detail, it consists of four main components: connecting bracket 611, motor assembly 612, transmission assembly 613 and connecting assembly 614.

[0041] Among them, the connecting bracket 611 ( Figure 11 The entire sliding power structure 61 is reliably connected to the battery pack 30, and at the same time provides a stable installation foundation and support for the motor assembly 612 and the transmission assembly 613. The transmission assembly 613 uses a synchronous belt drive to achieve power transmission, such as Figure 11The transmission system is clearly shown, specifically including: a driving wheel 6131 (directly connected to the motor), a driven wheel 6132 and a timing belt 6133 connecting the two wheels. The design of the transmission system ensures that the linear transmission direction of the timing belt 6133 is completely consistent with the linear direction of the electric vehicle, effectively ensuring the movement accuracy of the battery pack 30. The connecting assembly 614 includes two connecting drive blocks 6141 ( Figure 11 One end of the connecting driving block 6141 is firmly connected to the synchronous belt 6133, and the other end is detachably connected to the lower end of the battery pack 30 by a screw, which is convenient for maintenance and replacement.

[0042] Supporting sliding structure 62 as Figure 9 and Figure 10 As shown, it is located on both sides of the battery pack 30, wherein the supporting sliding rails 621 ( Figure 11 The three-section rail design used in this embodiment ensures that the battery pack 30 remains stable during forward and backward movement.

[0043] Figure 9 The protective box 16 outside the battery pack 30 is also shown. The box is provided with ventilation and heat dissipation holes 161, which can protect the battery pack 30 from external impact and ensure heat dissipation effect. Figure 9 and Figure 10 Also shown are the box body connection portion 41 and the center of gravity avoidance structure 70 of the storage box 40 , which form a complete matching system with the battery pack 30 and its moving mechanism.

[0044] The working principle of the entire center of gravity adjustment device 60 is as follows: after the motor assembly 612 is started, it generates rotational power, and the rotational motion is transmitted to the synchronous belt 6133 through the driving wheel 6131. The synchronous belt 6133 drives the connecting driving block 6141 to perform precise linear motion. The connecting driving block 6141 then drives the entire battery pack 30 to move forward and backward along the driving direction of the electric vehicle, thereby realizing the longitudinal position adjustment of the battery pack 30 in the electric vehicle, effectively changing the overall center of gravity position of the electric vehicle, and optimizing driving stability and controllability.

[0045] refer to Figures 9 - 10 The center of gravity avoidance structure 70 is a sophisticated mechanical design that resolves the conflict between the movement of the battery pack 30 and the space utilization of the storage box 40. The structure mainly consists of three core components: a clearance gap 71, a semi-enclosed mobile frame 72, and a mobile telescopic assembly 73.

[0046] like Figure 9 and Figure 10As shown, the clearance notch 71 is in the shape of an inverted "L" and is located on the side of the box connecting portion 41 near the battery pack 30, reserving the necessary space for the movement of the battery pack 30. The semi-enclosed movable frame 72 corresponds in shape to the clearance notch 71 and is connected to the inner wall of the box connecting portion 41 via a sliding mechanism, allowing for smooth horizontal sliding. The movable telescopic assembly 73 connects the semi-enclosed movable frame 72 to the fixed portion of the box connecting portion 41 and consists of a first rod sleeve 731, a second rod sleeve 732, and a telescopic spring connecting the two (the telescopic spring is not directly shown in the figure, but is located between the two rod sleeves).

[0047] The working principle of the center of gravity avoidance structure 70: When the system is in the initial state, the elastic force of the telescopic spring makes the semi-enclosed movable frame 72 fit tightly with the fixed part of the box connection part 41 to form a complete rectangular box frame structure. At this time, the available storage space of the storage box 40 reaches the maximum. When the center of gravity of the electric vehicle needs to be adjusted, the battery pack 30 moves toward the rear of the electric vehicle under the drive of the center of gravity adjustment device 60. During the movement, a part of the battery pack 30 will push the semi-enclosed movable frame 72 to slide inward inside the box connection part 41. At the same time, the battery pack 30 gradually occupies the space reserved for the clearance gap 71. When the battery pack 30 needs to move toward the front of the electric vehicle to return to its original position, the semi-enclosed movable frame 72 automatically resets under the action of the restoring force of the telescopic spring in the movable telescopic assembly 73, restoring the maximum storage space of the storage box 40.

[0048] To further optimize the design and address potential contact between items in the storage box 40 and the battery pack 30, a pivotally hinged isolation panel 74 is incorporated above the clearance notch 71 of the box connection 41. This isolation panel 74 naturally droops in the absence of external forces. However, when the semi-enclosed movable frame 72, pushed by the battery pack 30 and moving toward the interior of the box connection 41, simultaneously rotates the isolation panel 74 about its hinge point, forming an effective barrier that completely separates the interior of the storage box 40 from the upper portion of the battery pack 30, preventing items from falling onto the battery pack 30 and potentially impacting the performance and safety of the battery pack 30.

[0049] This design not only realizes the organic combination of storage function and center of gravity adjustment function, but also ensures that the two functions do not interfere with each other through isolation design, fully reflecting the innovation and practicality of the two-wheeled electric vehicle design.

[0050] The comprehensive working principle of this embodiment is as follows: Adaptive center-of-gravity pre-adjustment before startup: When a user places a heavy object on the pedal assembly 20, the system first monitors the weight and distribution of the heavy object in real time through the pressure sensor 80. At this time, the user can judge by himself according to the data displayed by the pressure sensor 80, or the intelligent system analyzes and gives prompts according to the data transmitted by the pressure sensor 80, enabling the user to adjust the shape of the pedal assembly 20 (horizontal state or funnel shape to varying degrees) through the pedal load-bearing adjustment structure 50 to ensure the bearing stability and safety of the heavy object in the static state. At the same time, the system will calculate in advance the static optimal center-of-gravity position of the electric vehicle based on the heavy-object data transmitted by the pressure sensor 80, combined with factors such as the vehicle body's own weight parameter and the position of the initial battery pack 30, and drive the battery pack 30 to automatically move to the calculated optimal position through the center-of-gravity adjustment device 60 to provide the best initial balance state for startup.

[0051] Dynamic center-of-gravity optimization during riding: After the electric vehicle starts, the system enters the dynamic adjustment mode. At this time, the system not only considers the weight factor of the heavy object, but also comprehensively analyzes multi-dimensional parameters such as the rider's weight data, real-time sitting posture changes, speed changes, and road slope. Through the built-in balance optimization algorithm, it calculates and continuously updates the optimal dynamic center-of-gravity position of the electric vehicle in real time. During riding, when an obvious change in the balance state is detected (such as the rider adjusting the posture, sudden change in vehicle speed, or entering an uphill / downhill section, etc.), the center-of-gravity adjustment device 60 will automatically fine-tune the position of the battery pack 30 to keep the electric vehicle in the best handling state at all times.

[0052] Intelligent adaptation to special road conditions: When facing an uphill section, the system will automatically move the battery pack 30 backward to increase the rear-wheel grip, prevent slipping and improve the climbing efficiency; when going downhill, the system will move the battery pack 30 forward appropriately to optimize the braking effect and reduce the risk of forward tilt; when turning, according to the turning direction and angle, the system can fine-tune the position of the battery pack 30 to improve the stability and smoothness of turning. This all-weather road-condition adaptation ability greatly improves the safety and driving experience of the electric vehicle in complex environments.

[0053] User-defined adjustment and system cooperation: In addition to automatic adjustment, the system also provides a manual adjustment option for the user. The user can manually adjust the position of the battery pack 30 through the control panel according to personal preferences or special needs, overriding the parameters automatically calculated by the system. The system will record the user's manual adjustment preferences and give priority to the user's habitual settings in the next similar situation to achieve a personalized riding experience with human-machine collaboration.

[0054] Seamless cooperation between storage and center-of-gravity adjustment: During the entire center-of-gravity adjustment process, to avoid spatial conflicts between the storage box 40 and the battery pack 30, a center-of-gravity avoidance structure 70 is specifically designed. When the battery pack 30 needs to move backward, the semi-closed moving frame 72 of the storage box 40 will automatically retract to create the necessary space; when the battery pack 30 moves forward, the semi-closed moving frame 72 automatically resumes under the action of spring force to maximize the storage space. At the same time, the isolation plate 74 always ensures that the storage area is physically isolated from the battery pack 30 to prevent accidental interference, realizing the seamless cooperation between the storage function and the center-of-gravity adjustment function.

[0055] Through the above multi-level and all-round intelligent adjustment mechanism, this embodiment not only achieves the static optimization and dynamic balance of the center of gravity of the electric vehicle, but also solves the coordination problem between practical functions and handling performance through structural innovation, enabling the electric vehicle to achieve an ideal balance in terms of load capacity, storage, and driving performance, and greatly improving the riding safety, comfort, and handling experience of users in various complex environments.

[0056] Embodiment 2: Rainwater resource system Reference Figures 13 - 14 , in this embodiment, rainwater is converted into a driving safety assistance resource, utilizing the moving space and mass characteristics of the protection box 16 of the battery pack 30 in the battery installation part 131. The system collects rainwater through the front-wheel deflector 110a and guides it to the retractable water storage bin 111a through the water collection channel 110b. The water storage bin is designed in the space generated by the movement of the protection box 16 carrying the battery pack 30: that is, the front space and the rear space of the protection box 16. When the protection box 16 moves forward, the rear water storage bin expands for water storage; when the protection box 16 moves backward, the front water storage bin expands for water storage. The water storage bin constitutes a complete water flow control system by setting pipelines, multi-directional nozzles 116, and electromagnetic control valves 113c. The core of the system lies in the 5-8 mm damping free movement space reserved for the battery pack 30 in the protection box 16. By setting damping elements 113a and pressure sensors 113b in this space, the micro-displacement of the battery pack 30 during emergency braking can be accurately captured. When this signal is detected, the electromagnetic control valve 113c is opened to activate the following functions.

[0057] Mud barrier removal system The water storage tank 111a adopts a partition design, including an atmospheric pressure water storage area and a compressed air energy storage area. The two areas are separated by an isolation membrane. The atmospheric pressure water storage area is connected to the water collection channel 110b to receive and store the rainwater collected by the front wheels; the compressed air energy storage area is connected to a small air pump through a one-way valve to maintain a pressure of 1.5 - 2.0 atmospheres. After the emergency brake is triggered, the electromagnetic control valve 113c receives a signal from the pressure sensor 113b and quickly opens the valve. The pressure in the compressed air area pushes the isolation membrane, and then pushes the water flow in the atmospheric pressure water storage area to generate an instantaneous high-pressure water flow. The multi-directional spray nozzles 116 are arranged 10 - 15 cm in front of the rear wheels and adopt a three-nozzle design. The central nozzle sprays directly, and the two side nozzles diverge at an angle of 15°. This ensures that the angle covers the key areas where the tires travel, can complete the water release within 0.1 second, and the water volume released each time is 20 - 30 ml, effectively removing a mud layer with a thickness not exceeding 5 mm or local water accumulation with a depth not exceeding 10 mm. Experiments show that this mud barrier removal system shortens the emergency braking distance of the two-wheeled electric vehicle on muddy roads by 25 - 30% and reduces the tire skidding phenomenon by more than 35%. See the comparison tables of three test results: Table 1: Test results of braking distance under the condition of 3 mm mud layer (unit: m) Test Serial Number Specified Initial Speed (km / h) Travel Direction Actual Initial Speed (km / h) Braking Distance of Unactivated System Braking Distance of Activated System Improvement Rate 1 20 Forward 20.2 4.85 3.58 26.20% 2 20 Backward 20.1 4.92 3.62 26.40% 3 30 Forward 30.3 9.56 7.12 25.50% 4 30 Backward 30.2 9.68 7.18 25.80% 5 40 Forward 40.2 16.37 12.13 25.90% 6 40 Backward 40.1 16.42 12.15 26.00% Average Value 　 　 　 　 26.00% 　 Table 2: Test results of braking distance under the condition of 5 mm mud layer (unit: m) Test Serial Number Specified Initial Speed (km / h) Travel Direction Actual Initial Speed (km / h) Braking Distance of Unactivated System Braking Distance of Activated System Improvement Rate 1 20 Forward 20.1 5.84 4.12 29.50% 2 20 Backward 20.2 5.86 4.15 29.20% 3 30 Forward 30.1 11.28 7.98 29.30% 4 30 Backward 30.2 11.35 8.02 29.30% 5 40 Forward 40.1 19.83 13.88 30.00% 6 40 Backward 40.3 19.96 13.97 30.00% Average Value 　 　 　 　 29.50% 　 Table 3: Statistical analysis of tire skidding phenomenon Mud Layer Thickness (mm) Initial Speed (km / h) Slip Duration of Unactivated System (ms) Slip Duration of Activated System (ms) Slip Reduction Rate 3 20 185 116 37.30% 3 30 267 173 35.20% 3 40 341 218 36.10% 5 20 232 138 40.50% 5 30 328 198 39.60% 5 40 412 251 39.10% Average Value 　 　 　 38.00% The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined device for stable load-bearing and intelligent center-of-gravity adjustment of two-wheeled electric vehicles, characterized in that include: Frame; A pedal assembly is mounted on the frame, the pedal assembly comprising two relatively movable pedal blocks, with a pedal load-bearing adjustment structure provided between the two pedal blocks; a battery pack is movably mounted on the frame, the battery pack being provided with a center of gravity adjustment device for driving the battery pack to move along the direction of travel of the electric vehicle; a storage box is mounted on the frame, the storage box comprising a box connecting portion and a box extending portion arranged from bottom to top, the box connecting portion being provided with a center of gravity avoidance structure, which cooperates with the center of gravity adjustment device to make space for the displacement of the battery pack.

2. The combined device for stable load bearing and intelligent center of gravity adjustment for two-wheel electric vehicles according to claim 1, characterized in that, The pedal load-bearing adjustment structure includes: a gear rack assembly, including a central gear and racks on both sides, one end of the rack is connected to the foot pedal block through a connecting pin; a support adjustment plate, the gear rack assembly is fixed to the center position of the support adjustment plate through a mounting box, support shafts are provided on both sides of the support adjustment plate, the support shafts pass through the strip-shaped movable holes on the foot pedal block, so that the foot pedal block can slide on the support shafts; a stepped adjustment platform, located on the support adjustment plate, is divided into a three-level structure; and an operating knob, inserted into the center of the gear and exposed to the outside of the foot pedal assembly.

3. The combined device for stable load bearing and intelligent center of gravity adjustment for two-wheeled electric vehicles according to claim 2, characterized in that, When the foot pedal block is against the first level of the stepped adjustment platform, the foot pedal assembly is in a horizontal state; when the foot pedal block moves to the second or third level, the two foot pedals form an inclined funnel-shaped structure from the outside to the middle, which is used to improve the stability of heavy object carrying.

4. The combined device for stable load-bearing and intelligent center-of-gravity adjustment of a two-wheeled electric vehicle according to claim 2, characterized in that, Two pressure sensors are provided below the support adjustment plate, one on each side of the support adjustment plate, for monitoring the weight carried by the pedal block and providing data support for the center of gravity adjustment device.

5. The combined device for stable load bearing and intelligent center of gravity adjustment of two-wheel electric vehicles according to claim 1, characterized in that, The center of gravity adjustment device includes: a sliding power structure, which is arranged in the middle position of the lower end of the battery pack, including a connecting bracket, a motor assembly, a transmission assembly and a connecting assembly, wherein the transmission assembly adopts a synchronous belt transmission method, including a driving wheel, a driven wheel and a synchronous belt connecting the two wheels, and the linear transmission direction of the synchronous belt is consistent with the linear direction of travel of the electric vehicle; the connecting assembly includes two connecting driving blocks, one end of the connecting driving block is connected to the synchronous belt, and the other end is connected to the lower end of the battery pack; and a supporting sliding structure, which is arranged on both sides of the battery pack, including supporting sliding rails, and the supporting sliding rails are symmetrically arranged on both sides of the sliding power structure and connected to the lower end of the battery pack.

6. The combined device for stable load bearing and intelligent center of gravity adjustment for two-wheel electric vehicles according to claim 1, characterized in that, The center of gravity avoidance structure includes: a clearance gap, which is opened on the side of the box connection part close to the battery pack; a semi-enclosed movable frame, which corresponds to the shape of the clearance gap and is connected to the inner wall of the box connection part through a sliding mechanism; and a movable telescopic component, which connects the semi-enclosed movable frame and the fixed part of the box connection part, including a first component rod sleeve, a second component rod sleeve and a telescopic spring connecting the two.

7. The combined device for stable load-bearing and intelligent center-of-gravity adjustment of a two-wheeled electric vehicle according to claim 6, characterized in that A rotatably hinged isolation plate is provided at the upper end of the notch in the box body connection portion, for separating the internal space of the storage box from the upper end of the battery pack.

8. The combined device for stable load bearing and intelligent center of gravity adjustment of an electric two-wheeler according to claim 1, characterized in that, A protective box is provided outside the battery pack, and ventilation and heat dissipation holes are provided on the box.

9. The combined device for stable load bearing and intelligent center of gravity adjustment of a two-wheeled electric vehicle according to claim 1, characterized in that The device includes a control system for calculating the optimal position of the battery pack based on the heavy object data monitored by the pressure sensor, and controlling the center-of-gravity adjustment device to drive the battery pack to move to the calculated optimal position.

10. The combined device for stable load bearing and intelligent center of gravity adjustment of a two-wheeled electric vehicle according to claim 9, characterized in that, The control system can automatically adjust the position of the battery pack according to the detected road condition information: on the uphill section, move the battery pack backward to increase the rear-wheel grip; on the downhill section, move the battery pack forward to optimize the braking effect; when turning, fine-tune the position of the battery pack according to the turning direction and angle to improve the turning stability.

11. The combined device for stable load bearing and intelligent center of gravity adjustment of a two-wheeled electric vehicle according to claim 1, characterized in that, A rainwater collection and utilization system is also provided on the frame, including: a front-wheel deflector for collecting rainwater; a water collection channel connected to the front-wheel deflector; a retractable water storage bin designed in the space generated by the movement of the protection box carrying the battery pack; multi-directional nozzles provided in front of the rear wheels, with a water flow shaping device and a diffuser plate; and an electromagnetic control valve provided with a pressure sensor, which is opened during emergency braking to direct the collected rainwater to the ground in front of the rear wheels to form a water film, and cooperate with the grooves and surface treatment of the rear wheels to enhance the contact pressure between the tires and the road surface.

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