electric two-wheeler

Abstract

This application provides an electric two-wheeler, including a frame, body panels, a running gear, a power system, and a battery. The frame includes a front frame, a middle frame, and a rear frame arranged sequentially along its longitudinal direction. The middle frame includes two side tube assemblies spaced apart along the left-right direction of the frame, connecting the front and rear frames along the longitudinal direction. The battery is housed between the two side tube assemblies. Each side tube assembly includes a first tube segment and a second tube segment. The first tube segment is located in front of the second tube segment. A vertical plane perpendicular to the left-right direction and passing through the width center of the frame is defined as a width center reference plane. Along the left-right direction, the average distance between the first tube segment and the width center reference plane is greater than the average distance between the second tube segment and the width center reference plane. The electric two-wheeler provided by this application has a frame capable of accommodating batteries of different specifications.

Description

Technical Field

[0001] This application relates to the field of two-wheeled vehicle technology, and more specifically, to an electric two-wheeled vehicle. Background Technology

[0002] Different models and sizes of electric two-wheelers use different battery specifications; for example, electric motorcycles typically have larger battery capacities than electric bicycles. In related technologies, electric two-wheelers require frames of different sizes to accommodate these different battery specifications. Producing electric two-wheelers with batteries of varying specifications necessitates multiple production lines, leading to increased production costs. Summary of the Invention

[0003] In view of this, this application provides an electric two-wheeled vehicle whose frame can accommodate batteries of different specifications.

[0004] One embodiment of this application provides an electric two-wheeled vehicle. The electric two-wheeled vehicle includes a frame, a body panel, a running system, a power system, and a battery. The body panel at least partially covers the frame. The running system is at least partially connected to the frame. The power system is supported by the frame and provides power to the running system. The battery is supported by the frame and electrically connected to the power system. The frame includes a front frame, a middle frame, and a rear frame arranged sequentially along its longitudinal direction. The middle frame includes two side tube assemblies spaced apart along the left-right direction of the frame, the two side tube assemblies being connected between the front frame and the rear frame along the longitudinal direction of the frame, and the battery being located between the two side tube assemblies. Each side tube assembly includes a first tube segment and a second tube segment. The first tube segment is located in front of the second tube segment along the longitudinal direction of the frame. A vertical plane perpendicular to the left-right direction of the frame and passing through the width center of the frame is defined as a width center reference plane. The width center reference plane is located between the two side tube assemblies along the left-right direction of the frame. The average distance between the first tube segment and the width center reference plane along the left and right directions of the frame is greater than the average distance between the second tube segment and the width center reference plane along the left and right directions of the frame.

[0005] In some embodiments of this application, the first tube segment includes a horizontal segment extending substantially along the longitudinal direction of the frame. The second tube segment includes a transition segment and a bending segment. The transition segment extends substantially along the longitudinal direction of the frame. The bending segment connects the horizontal segment and the bending segment. The average distance between the horizontal segment and the width center reference plane along the lateral direction of the frame is greater than the average distance between the transition segment and the width center reference plane along the lateral direction of the frame.

[0006] In some embodiments of this application, the average width of the horizontal segment along the left-right direction of the frame is greater than the average width of the transition segment along the left-right direction of the frame. The width of the front end of the bent segment along the left-right direction of the frame is greater than the width of the rear end of the bent segment along the left-right direction of the frame. The width of the bent segment along the left-right direction of the frame gradually narrows from front to back.

[0007] In some embodiments of this application, the side tube assembly further includes a side reinforcing tube. The side reinforcing tube is arranged substantially along the longitudinal direction of the vehicle frame. The front end of the side reinforcing tube is connected to the first tube segment or the front frame. The rear end of the side reinforcing tube is connected to the adapter segment.

[0008] In some embodiments of this application, the first tube segment further includes a vertical segment arranged substantially along the vertical direction of the vehicle frame. The vertical segment is located at the front end of the horizontal segment. The horizontal segment is connected to the front frame via the vertical segment. The front end of the side reinforcing tube is connected to the vertical segment. The average height of the transition segment along the vertical direction of the vehicle frame is greater than the average height of the horizontal segment along the vertical direction of the vehicle frame. The side reinforcing tube is located above the horizontal segment along the vertical direction of the vehicle frame.

[0009] In some embodiments of this application, the side tube assembly further includes a mounting plate and a widening tube. The mounting plate is welded to the first tube segment. The front end of the side reinforcing tube is connected to the mounting plate. The portion of the mounting plate facing away from the first tube segment is more biased towards the width center reference plane than the portion of the mounting plate connected to the first tube segment. The widening tube is connected to the side of the transition segment facing away from the width center reference plane. The rear end of the side reinforcing tube is connected to the widening tube so that the extension direction of the side reinforcing tube is parallel to the front-rear direction of the frame.

[0010] In some embodiments of this application, the first pipe segment and the second pipe segment are separate structures. The front end of the second pipe segment is provided as a sleeve segment. The sleeve segment is sleeved with the first pipe segment and fixed by welding.

[0011] In some embodiments of this application, a sleeve segment is fitted over the outside of a first pipe segment. The front end of the sleeve segment is welded to the first pipe segment. The sleeve segment has a slit arranged along the longitudinal direction of the vehicle frame. A welded portion is provided within the slit. The welded portion connects to the sleeve segment. The welded portion is also connected to a portion of the first pipe segment located within the sleeve segment.

[0012] In some embodiments of this application, the second pipe segment is mainly composed of two sub-plates along the left-right direction of the frame. The two sub-plates are joined together along the left-right direction of the frame and welded together. A slit is formed between the two sub-plates.

[0013] In some embodiments of this application, the frame further includes a crash barrier. The crash barrier is generally arranged along the left-right direction of the frame. Both ends of the crash barrier are connected to first pipe sections on both sides and to the lower side of the first pipe sections. Along the front-rear direction of the frame, the battery is located behind the crash barrier. Along the vertical direction of the frame, the battery is located above the crash barrier.

[0014] In this application, when the frame is used to assemble large electric two-wheelers, such as electric motorcycles, the frame is widened at the first tube section to accommodate a larger battery, thereby meeting the battery capacity requirements of large electric two-wheelers. Conversely, when the frame is used to assemble small electric two-wheelers, such as electric bicycles, the frame is narrowed at the second tube section to reduce the overall size and weight of the vehicle. Furthermore, the electric bicycle's sprocket being positioned on the outside of the second tube section does not increase the distance between the sprocket and the width center reference plane, thus facilitating user riding. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0016] Figure 1 This is a schematic diagram of the structure of an electric two-wheeled vehicle provided in an embodiment of this application; Figure 2 for Figure 1 A structural schematic diagram of a Chinese electric two-wheeler from another perspective; Figure 3 for Figure 1 A structural diagram of a Chinese electric two-wheeler, omitting some structural elements; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 for Figure 5 Enlarged view of section A in the middle. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] The term “and / or” as used herein includes any and all combinations of one or more of the related listed items.

[0020] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0021] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] See Figure 1 and Figure 2 One embodiment of this application provides an electric two-wheeled vehicle 100. The electric two-wheeled vehicle 100 includes a frame 10, a body panel 20, a running gear 30, a power system (not shown), and a battery 40 (e.g., ...). Figure 4 (As shown). Among them, the electric two-wheeled vehicle 100 can be an electric motorcycle or an electric bicycle.

[0023] To clearly illustrate the technical solution of this application, the following are also defined: Figures 1 to 5 The directions shown are front, back, left, right, up, and down. In this application, the length direction of the frame 10 of the electric two-wheeled vehicle 100 refers to... Figures 1 to 5 In the fore-and-aft direction, the width direction of the frame 10 of the electric two-wheeled vehicle 100 refers to... Figures 1 to 5 In the left-right direction, the height direction of the frame 10 of the electric two-wheeled vehicle 100 refers to... Figures 1 to 5 In the diagram, the horizontal plane refers to the plane perpendicular to the vertical direction, and the vertical plane refers to the plane perpendicular to the horizontal plane. The front, back, left, right, up, and down directions in the diagram are based on the electric two-wheeler 100 traveling on a level road, not on a sloping road.

[0024] See Figures 1 to 3 In some embodiments, the body panel 20 at least partially covers the frame 10. The running gear 30 is at least partially mounted on the frame 10. The power system is supported by the frame 10 and provides power to the running gear 30. The battery 40 is supported by the frame 10 and electrically connected to the power system.

[0025] See Figure 3 In some embodiments, the frame 10 includes a front frame 11, a middle frame 13, and a rear frame 12 arranged sequentially along its longitudinal direction. The middle frame 13 includes two side tube assemblies 130 spaced apart in the left-right direction. The side tube assemblies 130 connect the front frame 11 and the rear frame 12 along the longitudinal direction of the frame 10. The battery 40 is located between the two side tube assemblies 130.

[0026] In some embodiments, each side tube assembly 130 includes a first tube segment 131 and a second tube segment 132. The first tube segment 131 is located in front of the second tube segment 132 along the longitudinal direction of the frame 10. A vertical plane perpendicular to the lateral direction of the frame 10 and passing through the width center of the frame 10 is defined as the width center reference plane S. The width center reference plane S is located between the two side tube assemblies 130 along the lateral direction of the frame 10. The average distance between the first tube segment 131 and the width center reference plane S along the lateral direction of the frame 10 is greater than the average distance between the second tube segment 132 and the width center reference plane S along the lateral direction of the frame 10. Specifically, the average distance between the first tube segment 131 along the left-right direction of the frame 10 and the width center reference plane S refers to the average vertical distance between the inner side of the portion of the first tube segment 131 extending substantially along the horizontal plane and the width center reference plane S; the average distance between the second tube segment 132 along the left-right direction of the frame 10 and the width center reference plane S refers to the average vertical distance between the inner side of the portion of the second tube segment 132 extending substantially along the horizontal plane and the width center reference plane S; for example Figure 3 In this case, D1 is greater than D2. For example, the two side tube assemblies 130 can be symmetrically arranged along the left and right directions of the frame 10 with the width center reference plane S as the boundary.

[0027] When the frame 10 is used to assemble a large electric two-wheeler 100, such as an electric motorcycle, the frame 10 is widened at the first tube section 131 to accommodate a larger battery 40, thereby meeting the battery 40 capacity requirements of the large electric two-wheeler 100. When the frame 10 is used to assemble a small electric two-wheeler 100, such as an electric bicycle, the frame 10 is narrowed at the second tube section 132 to reduce the overall size and weight of the vehicle. Furthermore, the widening of the frame 10 at the first tube section 131 provides a mounting base for a wider footrest 21, improving riding comfort.

[0028] Typically, the sprocket connecting the pedals 50 of an electric bicycle is located on the outer side of the frame 10 in the left-right direction for easy removal and maintenance. A space is formed between the rear side of the first tube segment 131 and the outer side of the second tube segment 132 (the side facing away from the width center reference plane S) to accommodate the sprocket. Positioning the sprocket on the outer side of the second tube segment 132 does not increase the distance between the sprocket and the width center reference plane S, thus facilitating riding.

[0029] Therefore, the frame 10 in this application can be used as both the frame 10 of an electric motorcycle and the frame 10 of an electric bicycle, which helps to reduce the production and design costs of the frame 10 when producing electric two-wheelers 100 of various specifications.

[0030] In some embodiments, the first pipe section 131 and the second pipe section 132 are separate structures, connected to each other by welding or bolts, which facilitates production, transportation and installation. In other embodiments, the first pipe section 131 and the second pipe section 132 can be integrally formed structures.

[0031] See Figure 3 and Figure 4 In some embodiments, within the same-side tube assembly 130, the first tube segment 131 includes a horizontal segment 1311 extending substantially along the longitudinal direction of the frame 10. The horizontal segment 1311 may not be perfectly parallel to the horizontal plane, but rather has a small angle with it. The second tube segment 132 includes a transition segment 1321 and a bending segment 1322. The transition segment 1321 extends substantially along the longitudinal direction of the frame 10. The bending segment 1322 connects the horizontal segment 1311 and the bending segment 1322. The average distance between the horizontal segment 1311 and the width center reference plane S along the lateral direction of the frame 10 is greater than the average distance between the transition segment 1321 and the width center reference plane S along the lateral direction of the frame 10. Specifically, the average distance between the horizontal segment 1311 along the left-right direction of the frame 10 and the width center reference plane S refers to the average value of the vertical distance between the side of the horizontal segment 1311 facing the width center reference plane S and the width center reference plane S; the average distance between the transition segment 1321 along the left-right direction of the frame 10 and the width center reference plane S refers to the average value of the vertical distance between the side of the transition segment 1321 facing the width center reference plane S and the width center reference plane S; for example Figure 3 In this context, D1 is greater than D2. For example, the horizontal segments 1311 on both sides, the bending segments 1322 on both sides, and the transition segments 1321 on both sides can all be used to accommodate the battery 40; it is understood that the horizontal segments 1311 on both sides, the bending segments 1322 on both sides, and the transition segments 1321 on both sides can also be used to accommodate other components of the electric two-wheeler 100.

[0032] By setting horizontal segments 1311 and transition segments 1321 that extend substantially along the front-rear direction of the frame 10, the frame 10 has sufficient structural strength in its front-rear direction to protect the user's riding safety. Furthermore, the space between the two horizontal segments 1311 and the two transition segments 1321 is approximately rectangular in cross-section in the horizontal plane, facilitating the arrangement of other structures of the electric two-wheeler 100, such as the battery 40.

[0033] In some embodiments, the average width of the horizontal segment 1311 along the left-right direction of the frame 10 is greater than the average width of the transition segment 1321 along the left-right direction of the frame 10, which is beneficial for making the structural strength of the horizontal segment 1311 stronger than that of the transition segment 1321. Furthermore, the horizontal segment 1311 is positioned further outward in the left-right direction than the transition segment 1321. By making the horizontal segment 1311 structurally stronger, the frame 10's resistance to deformation from impacts on its outer left-right sides is enhanced. The narrower transition segment 1321 is beneficial for reducing the space occupied by the frame 10 in its left-right direction and also for increasing the space between the two transition segments 1321.

[0034] Understandably, in some practical examples, the width of the horizontal segment 1311 is approximately equal along the left-right direction of the frame 10 from front to back, so that the horizontal segment 1311 has approximately the same safety protection capability at each point. The width of the transition segment 1321 is approximately equal along the left-right direction of the frame 10 from front to back, so that the transition segment 1321 has approximately the same safety protection capability at each point.

[0035] See Figure 3 In some embodiments, the width of the front end of the bent segment 1322 along the left-right direction of the frame 10 is greater than the width of the rear end of the bent segment 1322 along the left-right direction of the frame 10, so as to facilitate the connection between the horizontal segment 1311 and the transition segment 1321. It is understood that in some embodiments, the width of the bent segment 1322 along the left-right direction of the frame 10 gradually narrows from front to back, improving the structural stability of the bent segment 1322 and the structural stability between the first tube segment 131 and the second tube segment 132, which is beneficial to enhancing the deformation resistance of the frame 10. For example, the cross-sectional boundary of the bent segment 1322 along the horizontal plane is approximately triangular.

[0036] See Figure 3 and Figure 5 In some embodiments, when the first pipe segment 131 and the second pipe segment 132 are separate structures, the second pipe segment 132 includes a sleeve segment 1323. Specifically, the front end of the second pipe segment 132 is provided as the sleeve segment 1323. The sleeve segment 1323 is sleeved on the first pipe segment 131 and fixed by welding. For example, the sleeve segment 1323 is sleeved on the rear end of the horizontal segment 1311. The second pipe segment 132 is welded to the first pipe segment 131 through the sleeve segment 1323, which facilitates the connection between the second pipe segment 132 and the first pipe segment 131 while strengthening the structural strength of the connection between the second pipe segment 132 and the first pipe segment 131.

[0037] See Figure 5 and Figure 6In some embodiments, the sleeve segment 1323 is fitted onto the outside of the first pipe segment 131. The front end of the sleeve segment 1323 is welded to the first pipe segment 131. The sleeve segment 1323 has a slit 1323a arranged along the longitudinal direction of the frame 10, facilitating the fitting of the sleeve segment 1323 onto the outside of the first pipe segment 131. A welding portion 1323b is provided within the slit 1323a. The welding portion 1323b connects to the sleeve segment 1323. The welding portion 1323b is also connected to the portion of the first pipe segment 131 located within the sleeve segment 1323. By placing the welding portion 1323b within the slit 1323a, the welding portion 1323b can extend along the longitudinal direction of the frame 10, which can improve the connection stability between the sleeve segment 1323 and the first pipe segment 131, and also improve the structural strength of the connection between the sleeve segment 1323 and the first pipe segment 131. Among them, the welding part 1323b is the weld structure left by welding.

[0038] Understandably, in some embodiments, the front end of the sleeve segment 1323 is welded to the first pipe segment 131 around its circumference to improve connection stability and structural strength.

[0039] See Figure 3 In some embodiments, the second pipe segment 132 includes two segmented sections 1324. That is, the second pipe segment 132 is mainly composed of two segmented sections 1324 along the left-right direction of the frame 10. The two segmented sections 1324 are joined together along the left-right direction of the frame 10 and welded together. The method of forming the second pipe segment 132 by joining two segmented sections 1324 facilitates the construction of the structural shapes of the sleeve segment 1323, the bending segment 1322, and the transition segment 1321, which helps to reduce the manufacturing difficulty of the second pipe segment 132.

[0040] See Figure 3 and Figure 6 It is understood that in some embodiments, the slit 1323a is formed between the two partition plates 1324 to facilitate the setting of the slit 1323a.

[0041] See Figure 3 In some embodiments, the side tube assembly 130 on the same side further includes a side reinforcing tube 133. The side reinforcing tube 133 is arranged substantially along the front-rear direction of the frame 10. The front end of the side reinforcing tube 133 is connected to the first tube segment 131. The rear end of the side reinforcing tube 133 is connected to the transition segment 1321. The side reinforcing tube 133 adds a supporting effect between the transition segment 1321 and the first tube segment 131, enhancing the structural strength of the frame 10 and improving the frame 10's resistance to deformation in both the lateral and front-rear directions. By providing the side reinforcing tube 133, the reduction in structural strength caused by the deformation in the lateral direction from the first tube segment 131 to the second tube segment 132 is compensated.

[0042] See Figure 3 and Figure 4 In some embodiments, the first tube segment 131 further includes a vertical segment 1312 disposed substantially along the vertical direction of the frame 10. The vertical segment 1312 may not be completely vertical, but may be inclined at a small angle. The vertical segment 1312 is located at the front end of the horizontal segment 1311. The horizontal segment 1311 is connected to the front frame 11 through the vertical segment 1312. The front end of the side reinforcing tube 133 is connected to the vertical segment 1312. The average height of the transition segment 1321 along the vertical direction of the frame 10 is greater than the average height of the horizontal segment 1311 along the vertical direction of the frame 10. The side reinforcing tube 133 is located above the horizontal segment 1311 along the vertical direction of the frame 10. For example, along the vertical direction of the frame 10, the highest height of the transition segment 1321 is higher than the highest height of the horizontal segment 1311 to facilitate the assembly of the side reinforcing tube 133. Understandably, in some embodiments, the vertical segment 1312 and the horizontal segment 1311 are integrally formed structures to reduce structural breakpoints within the first pipe segment 131 and improve structural strength. In other embodiments, the vertical segment 1312 and the horizontal segment 1311 may also be separate structures.

[0043] The side reinforcing tubes 133 and horizontal segments 1311 are distributed along the vertical direction of the frame 10, which helps to improve the structural strength of the frame 10 while avoiding further increasing the width of the frame 10. The side reinforcing tubes 133 are arranged using the space required by the battery 40 or other components of the electric two-wheeler 100 located between the side tube assemblies 130 along the vertical direction of the frame 10, improving space utilization. At the same time, the side reinforcing tubes 133 are approximately at the same height from front to back in the vertical direction of the frame 10, which helps to prevent the side reinforcing tubes 133 from bending in the vertical direction of the frame 10 when subjected to impacts in the front-rear direction, thus effectively resisting impacts on the frame 10 in the front-rear direction. Furthermore, although the transition segment 1321 is thinner in width, it is thicker in height to enhance the structural strength of the transition segment 1321 itself.

[0044] In some embodiments, the height of the front end of the bent segment 1322 along the vertical direction of the frame 10 is less than the height of the rear end of the bent segment 1322 along the vertical direction of the frame 10, so as to facilitate the connection between the horizontal segment 1311 and the transition segment 1321. It is understood that in some embodiments, the height of the bent segment 1322 along the vertical direction of the frame 10 gradually increases from front to back, improving the structural stability of the bent segment 1322 and the structural stability between the first tube segment 131 and the second tube segment 132, which is beneficial to enhancing the deformation resistance of the frame 10. For example, the cross-sectional boundary of the bent segment 1322 along the vertical plane is approximately triangular.

[0045] In some embodiments, the side pipe assembly 130 further includes a mounting piece 134 in the same-side pipe assembly 130. The mounting piece 134 is welded to the first pipe segment 131. The side reinforcing pipe 133 is connected to the mounting piece 134. Compared to the method of directly welding the side reinforcing pipe 133 to the first pipe segment 131, the mounting piece 134 can provide a larger weld portion 1323b between it and the first pipe segment 131, thereby enhancing the structural stability between the side reinforcing pipe 133 and the first pipe segment 131; compared to the method of connecting the side reinforcing pipe 133 to the bolt holes of the first pipe segment 131 by bolts, welding the mounting piece 134 can avoid damaging the structure of the first pipe segment 131, which is beneficial to avoid reducing the structural strength of the first pipe segment 131 itself.

[0046] In some embodiments, the side reinforcing tube 133 extends generally in a straight line to provide sufficient impact resistance. The portion of the mounting plate 134 facing away from the first tube segment 131 is more biased toward the width center reference plane S than the portion of the mounting plate 134 that is connected to the first tube segment 131. This allows the front end of the side reinforcing tube 133 to be closer to the width center reference plane S, which helps to reduce the angle between the side reinforcing tube 133 and the width center reference plane S. This helps to prevent the side reinforcing tube 133 from bending in the left-right direction of the frame 10 when it is impacted in the front-rear direction of the frame 10, thus effectively resisting the impact on the frame 10 in its front-rear direction.

[0047] In some embodiments, the side tube assembly 130 further includes a widening tube 135 in the same-side tube assembly 130. The rear end of the side reinforcing tube 133 is connected to the widening tube 135 such that the extension direction of the side reinforcing tube 133 is parallel to the front-rear direction of the frame 10. The widening tube 135 is connected to the side of the transition segment 1321 opposite to the width center reference plane S.

[0048] In some embodiments, a portion of the mounting plate 134 extends to connect with the vertical segment 1312 to facilitate connection of the side reinforcing tube 133. Another portion of the mounting plate 134 extends to connect with the horizontal segment 1311 to facilitate the mounting of a footrest 21 for placing a user's feet and / or a storage compartment for carrying the battery 40.

[0049] See Figure 4 and Figure 5 In some embodiments, the frame 10 further includes a crash barrier 14. The crash barrier 14 is arranged substantially along the left-right direction of the frame 10. Both ends of the crash barrier 14 are connected to the first pipe sections 131 on both sides, and are connected to the lower side of the first pipe sections 131 along the vertical direction of the frame 10. Along the front-rear direction of the frame 10, the battery 40 is located behind the crash barrier 14. Along the vertical direction of the frame 10, the battery 40 is located above the crash barrier 14. By providing the crash barrier 14, the protection effect of the electric two-wheeled vehicle 100 on the battery 40 and other structures is improved when it is moving forward.

[0050] It is understood that in some embodiments, the left and right ends of the anti-collision pipe 14 are bent and extended obliquely upward and backward, so as to facilitate the connection of the anti-collision pipe 14 with the first pipe segments 131 on both sides.

[0051] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. An electric two-wheeled vehicle, comprising: Frame; A body panel that at least partially covers the vehicle frame; A walking system, which is at least partially connected to the vehicle frame; A power system, which is supported by the vehicle frame and provides power to the running gear; A battery, which is supported by the vehicle frame and electrically connected to the power system; The vehicle frame includes a front frame, a middle frame, and a rear frame distributed sequentially along its longitudinal direction; Its features are, The mid-frame includes two side tube assemblies spaced apart along the left-right direction of the frame. The two side tube assemblies are connected between the front frame and the rear frame along the front-rear direction of the frame. The battery is located between the two side tube assemblies. Each side tube assembly includes a first tube segment and a second tube segment. The first tube segment is located in front of the second tube segment along the front-rear direction of the frame. A vertical plane perpendicular to the left-right direction of the frame and passing through the width center of the frame is defined as the width center reference plane. The width center reference plane is located in the middle of the two side tube assemblies along the left-right direction of the frame. The average distance between the first tube segment along the left-right direction of the frame and the width center reference plane is greater than the average distance between the second tube segment along the left-right direction of the frame and the width center reference plane.

2. The electric two-wheeled vehicle according to claim 1, characterized in that, The first tube segment includes a horizontal segment extending substantially along the longitudinal direction of the frame. The second tube segment includes a transition segment and a bending segment. The transition segment extends substantially along the longitudinal direction of the frame, and the bending segment connects the horizontal segment and the bending segment. The average distance between the horizontal segment and the width center reference plane along the left-right direction of the frame is greater than the average distance between the transition segment and the width center reference plane along the left-right direction of the frame.

3. The electric two-wheeled vehicle according to claim 2, characterized in that, The average width of the horizontal segment along the left-right direction of the frame is greater than the average width of the transition segment along the left-right direction of the frame; the width of the front end of the bending segment along the left-right direction of the frame is greater than the width of the rear end of the bending segment along the left-right direction of the frame; the width of the bending segment along the left-right direction of the frame gradually narrows from front to back.

4. The electric two-wheeled vehicle according to claim 2, characterized in that, The side tube assembly also includes a side reinforcing tube, which is arranged basically along the front-rear direction of the vehicle frame. The front end of the side reinforcing tube is connected to the first tube segment or the front frame, and the rear end of the side reinforcing tube is connected to the adapter segment.

5. The electric two-wheeled vehicle according to claim 4, characterized in that, The first tube segment further includes a vertical segment arranged substantially along the vertical direction of the vehicle frame. The vertical segment is located at the front end of the horizontal segment, and the horizontal segment is connected to the front frame through the vertical segment. The front end of the side reinforcing tube is connected to the vertical segment. The average height of the transition segment along the vertical direction of the vehicle frame is greater than the average height of the horizontal segment along the vertical direction of the vehicle frame. The side reinforcing tube is located above the horizontal segment along the vertical direction of the vehicle frame.

6. The electric two-wheeled vehicle according to claim 4, characterized in that, The side tube assembly also includes a mounting plate and a widening tube. The mounting plate is welded to the first tube segment. The front end of the side reinforcing tube is connected to the mounting plate. The portion of the mounting plate away from the first tube segment is more biased towards the width center reference plane than the portion of the mounting plate connected to the first tube segment. The widening tube is connected to the side of the transition segment away from the width center reference plane. The rear end of the side reinforcing tube is connected to the widening tube so that the extension direction of the side reinforcing tube is parallel to the front-rear direction of the frame.

7. The electric two-wheeled vehicle according to claim 1 or 3, characterized in that, The first pipe segment and the second pipe segment are separate structures. The front end of the second pipe segment is set as a sleeve segment, which is sleeved with the first pipe segment and fixed by welding.

8. The electric two-wheeled vehicle according to claim 7, characterized in that, The sleeve segment is sleeved on the outside of the first pipe segment, and the front end of the sleeve segment is welded to the first pipe segment; the sleeve segment has a slit arranged along the front-rear direction of the frame, and a welding part is provided in the slit, the welding part is connected to the sleeve segment, and the welding part is also connected to the portion of the first pipe segment located inside the sleeve segment.

9. The electric two-wheeled vehicle according to claim 8, characterized in that, The second pipe section is mainly composed of two sub-plates along the left-right direction of the frame. The two sub-plates are joined together along the left-right direction of the frame and welded to each other. The slit is formed between the two sub-plates.

10. The electric two-wheeled vehicle according to claim 1 or 3, characterized in that, The frame also includes a crash tube, which is arranged basically along the left-right direction of the frame. The two ends of the crash tube are respectively connected to the first tube segments on both sides and connected to the lower side of the first tube segments. Along the front-rear direction of the frame, the battery is located behind the crash tube. Along the vertical direction of the frame, the battery is located above the crash tube.

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