Electric two-wheeled vehicle

Abstract

The application discloses an electric two-wheeled vehicle, which comprises a frame, a walking system, a suspension system and a power system, the frame comprises a front frame and a rear frame, the walking system comprises a rear wheel, the suspension system comprises a rear suspension, the rear suspension comprises a rear fork and a rear shock absorber, one end of the rear shock absorber is connected with the rear frame, and the other end is connected with the rear fork or the rear wheel, the front frame is provided with a second connecting part and a first connecting part distributed along the length direction of the frame, the second connecting part is located behind the first connecting part, the first connecting part connects the front frame with the rear fork, so that the first connecting part can receive the force load applied from the rear fork to the front frame, and the second connecting part connects the front frame with the rear frame. Through the above arrangement, the first connecting part can bear the force load applied from the rear fork to the front frame, the stress concentration of the second connecting part is reduced, and thus the overall structural strength and durability of the frame are improved.

Description

Technical Field

[0001] This application relates to the field of vehicle engineering, and in particular to an electric two-wheeled vehicle. Background Technology

[0002] Electric two-wheelers are a lightweight and flexible means of short-distance urban transportation, widely used in commuting, rental, and leisure scenarios, combining environmental protection, energy saving, and ease of use. However, they also have the following problems:

[0003] Most electric two-wheelers use a unibody frame design where the side tubes and main beams are integrally formed, making it difficult to reuse the same frame structure across different models. Each time a new model is developed, the frame must be redesigned, resulting in low parts interchangeability and long design verification cycles. To shorten vehicle development cycles, some existing electric two-wheelers use a two-section spliced ​​frame, replacing either the front or rear frame to change the frame type when developing or assembling different models. However, in current electric two-wheelers on the market, the connection stability between the front and rear frames at the splicing point is insufficient, especially during rides on bumpy roads. The rear swingarm and rear shock absorber of the suspension system exert strong force feedback on the rear frame, resulting in significant torque at the splicing point between the front and rear frames, affecting the structural strength of the joint and thus the overall strength of the vehicle. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide an electric two-wheeled vehicle with a more versatile frame and higher structural strength.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides an electric two-wheeled vehicle, which includes a frame, a running gear system, a suspension system, and a power system. The frame includes a front frame and a rear frame. The running gear includes a rear wheel, which is at least partially located under the rear frame. The suspension system includes a rear suspension, which includes a rear swingarm and a rear shock absorber. One end of the rear shock absorber is connected to the rear frame, and the other end is connected to the rear swingarm or the rear wheel. The power system is connected to the rear wheel via transmission. The front frame is provided with a second connecting portion and a first connecting portion distributed along the length of the frame. The second connecting portion is located behind the first connecting portion. The first connecting portion connects the front frame to the rear swingarm so that the first connecting portion can receive the force load applied from the rear swingarm to the front frame. The second connecting portion connects the front frame to the rear frame.

[0007] Furthermore, the front frame includes a first front frame and a second front frame, the rear end of the first front frame extends rearward and upward, the second front frame is connected to the rear end of the first front frame, a second connecting part is disposed / installed on the second front frame, and a first connecting part is disposed / installed on the first front frame.

[0008] Furthermore, the rear frame includes a first rear frame, which is connected to a second connecting part, and the rear end of the first rear frame extends rearward and upward; the extension direction of the first front frame forms a first angle with the horizontal plane, and the extension direction of the first rear frame forms a second angle with the horizontal plane, the angle of the second angle being greater than the angle of the first angle.

[0009] Furthermore, the first included angle ranges from 19.5° to 23.8°, and the second included angle ranges from 19.8° to 24.2°.

[0010] Furthermore, at least a portion of the second front frame is tubular, at least a portion of the first rear frame is tubular, and the tubular structures of the second front frame and the first rear frame are interlocked and coaxially arranged.

[0011] Furthermore, the end of the tubular structure of the first rear frame passes through the second front frame and is located at the junction of the first and second front frames; the outer diameter of the tubular structure of the first rear frame is smaller than the outer diameter of the tubular structure of the first front frame.

[0012] Furthermore, the rear suspension includes a swingarm pin, the rear swingarm being rotatably connected to the first connecting part via the swingarm pin. When viewed along the extension direction of the centerline of the tubular structure of the first rear frame, the first rear frame and the swingarm pin at least partially overlap.

[0013] Furthermore, the rear suspension includes a shock absorber pin, and the rear shock absorber is rotatably connected to the rear frame via the shock absorber pin. When viewed along the extension direction of the centerline of the tubular structure of the first rear frame, the first rear frame and the shock absorber pin at least partially overlap.

[0014] Furthermore, the rear frame also includes a second rear frame, which is connected to the end of the first rear frame away from the front frame and extends substantially along the height of the frame. The rear shock absorber is rotatably connected to the second rear frame via a shock absorber pin.

[0015] Furthermore, a reinforcing plate is provided at the connection between the second front frame and the first rear frame. The first part of the reinforcing plate is attached to and fixed to the outer peripheral wall of the second front frame, and the second part of the reinforcing plate is attached to and fixed to the outer peripheral wall of the first rear frame.

[0016] In the electric two-wheeled vehicle provided in this application, a second connecting part and a first connecting part are respectively provided on the front frame. The front frame is connected to the rear frame through the second connecting part, and the rear swingarm is connected to the front frame through the first connecting part. This enables the first connecting part to bear the force load transmitted from the rear swingarm to the front frame, reduces the stress concentration at the second connecting part, avoids the breakage at the connection between the front frame and the rear frame, and improves the overall structural strength of the frame. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the electric two-wheeled vehicle in the embodiments of this application;

[0018] Figure 2 This is a partial structural schematic diagram of the electric two-wheeled vehicle in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the overall structure of the vehicle frame from a first-view perspective in the embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the overall structure of the vehicle frame from a second perspective in the embodiment of this application;

[0021] Figure 5 This is a partial structural diagram of the steering system in the embodiments of this application;

[0022] Figure 6 for Figure 5 Enlarged view of point A;

[0023] Figure 7 This is a cross-sectional view of the handle tube in the embodiment of this application;

[0024] Figure 8 for Figure 7 Enlarged view of point B;

[0025] Figure 9 This is a schematic diagram of the structure of the first type of mounting plate connected to the inner wall of the handle tube in the embodiments of this application;

[0026] Figure 10 This is a schematic diagram of the second type of mounting plate connected to the inner wall of the handle tube in the embodiments of this application;

[0027] Figure 11 This is a side sectional view of the balance block in the embodiment of this application;

[0028] Figure 12 This is a front view of the two vehicles with pedals in the embodiment of this application;

[0029] Figure 13 This is a partial structural diagram of the lighting system in the embodiments of this application;

[0030] Figure 14 This is an exploded view of the lighting system in the embodiment of this application;

[0031] Figure 15 This is a schematic diagram of the structure of the lighting lamp in the embodiment of this application. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0033] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] like Figure 1 and Figure 2 As shown, this application provides an electric two-wheeled vehicle 100, which includes a frame 11, a running gear system 12, a suspension system 13, a steering system 14, a power system 15, and a body panel 16. The frame 11 constitutes the main frame of the electric two-wheeled vehicle 100, and includes a front frame 111 and a rear frame 112. The front frame 111 and the rear frame 112 are assembled and connected, optionally by a detachable connection or by welding. The running gear system 12 includes a front wheel 121 and a rear wheel 122, with at least a portion of the front wheel 121 and at least a portion of the rear wheel 122 located below the frame 11. The suspension system 13 includes a front suspension 131 and a rear suspension 132. The front suspension 131 includes a front fork 1311 connected to the front wheel 121. The rear suspension 132 includes a rear swingarm 1321 and a rear shock absorber 1322. One end of the rear swingarm 1321 is connected to the front frame 111, and the other end is connected to the rear wheel 122. One end of the rear shock absorber 1322 is connected to the rear frame 112, and the other end is connected to either the rear swingarm 1321 or the rear wheel 122. The steering system 14 includes a handlebar tube 141 connected to the front fork 1311 and located at the end of the front fork 1311 opposite to the front wheel 121. The powertrain 15 is supported by the frame 11 or the rear swingarm 1321 and is drive-connected to the rear wheel 122. The body panel 16 covers at least a portion of the frame 11.

[0035] To clearly illustrate the technical solution of this application, the following are also provided: Figure 1 The electric two-wheeler 100 shown has up-down, left-right, and front-back directions. It should be noted that the front-back, left-right, and up-down directions in this article refer to the directions when the electric two-wheeler 100 is traveling on a horizontal road. In the following definition of the direction of the frame 11, the width direction of the frame 11 is parallel to the left-right direction of the electric two-wheeler 100, the length direction of the frame 11 is parallel to the front-back direction of the electric two-wheeler 100, and the height direction of the frame 11 is parallel to the up-down direction of the electric two-wheeler 100.

[0036] like Figure 3 and Figure 4 As shown, in one implementation, the front frame 111 is connected to a second connecting portion 113 and a first connecting portion 114 distributed along the length direction of the frame 11. Viewed along the width direction of the frame 11, the second connecting portion 113 is located behind the first connecting portion 114. The front frame 111 is connected to the rear frame 112 via the second connecting portion 113, and the front frame 111 is connected to the rear swingarm 1321 via the first connecting portion 114, so that the first connecting portion 114 can receive the force load applied from the rear swingarm 1321 to the front frame 111.

[0037] Specifically, the second connecting portion 113 is integrally formed with the front frame 111, serving as an extension of the front frame 111 and capable of being embedded into the rear frame 112; or the second connecting portion 113 forms a receiving cavity, and the end of the rear frame 112 near the front frame 111 can be embedded into the receiving cavity of the second connecting portion 113. The first connecting portion 114 can be a sheet metal part, which is welded to the front frame 111.

[0038] During vehicle operation, the longitudinal force load (parallel to the height direction of the frame 11) and lateral force load (parallel to the length direction of the frame 11) borne by the rear swingarm 1321 can be transmitted from the rear swingarm 1321 to the first connecting part 114. The first connecting part 114 then transmits the force load to the connection between the first connecting part 114 and the front frame 111, distributing the force load to other parts of the front frame 111. Furthermore, a portion of the force load can be transmitted to the rear frame 112 via the rear shock absorber 1322. By having the front frame 111 and the rear frame 112 jointly bear the force load exerted by the rear swingarm 1321 on the frame 11, the structural stability of the connection between the front frame 111 and the rear frame 112 is improved.

[0039] In one implementation, the front frame 111 further includes a first front frame 1111 and a second front frame 1112. The first front frame 1111 is connected to the second front frame 1112, and the second front frame 1112 is connected to the rear end of the first front frame 1111. Both the first front frame 1111 and the second front frame 1112 are tubular structures. Viewed from the width direction of the frame 11, both the first front frame 1111 and the second front frame 1112 extend towards the rear and upward of the frame 11, and the angles formed by their respective extension directions with the horizontal plane 101 are different. In this embodiment, the angle formed by the extension direction of the first front frame 1111 with the horizontal plane 101 is smaller than the angle formed by the extension direction of the second front frame 1112 with the horizontal plane 101. It should be noted that the horizontal plane 101 is perpendicular to the height direction of the frame 11.

[0040] The second connecting part 113 is disposed on the second front frame 1112 and located at one end of the second front frame 1112 opposite to the first front frame 1111. The first connecting part 114 is disposed on the first front frame 1111.

[0041] The above configuration can improve the load capacity of the front frame 111. Since the angle between the first front frame 1111 and the horizontal plane 101 is different from the angle between the second front frame 1112 and the horizontal plane 101, the influence of the force load applied to the first front frame 1111 on the connection between the front frame 111 and the rear frame 112 is reduced, and the stress applied by the rear horizontal fork 1321 is avoided at the connection between the second connection 113 and the rear frame 112, thereby improving the structural strength of the frame 11.

[0042] In one implementation, the rear frame 112 includes a first rear frame 1121, which is connected to a second connecting portion 113. Viewed from the width direction of the frame 11, the first rear frame 1121 extends rearward and upward from the frame 11. The extending direction of the first front frame 1111 forms a first angle α with the horizontal plane 101, and the extending direction of the first rear frame 1121 forms a second angle β with the horizontal plane 101. The first angle α ranges from 19.5° to 23.8°. The second angle β ranges from 19.8° to 24.2°. Further, the first angle α ranges from 19.9° to 23.4°, and the second angle β ranges from 20.2° to 23.8°. More preferably, the first angle α is 21°, and the second angle β is 22°. It should be noted that if the range of the included angle α and the included angle β is too large, the force load will be concentrated on the first rear frame 1121, and effective stress dispersion cannot be achieved. If the range of the included angle α and the included angle β is too small, the component of the force load in the length direction of the frame 11 will be large. With the above arrangement, the force load transmitted by the rear suspension 132 can be decomposed in the first front frame 1111 and the first rear frame 1121 of the frame 11, effectively reducing the force load acting on the second connection 113, avoiding stress concentration at the connection between the front frame 111 and the rear frame 112, and improving the overall structural strength of the frame 11.

[0043] In this embodiment, both the first rear frame 1121 and the first front frame 1111 are straight tubular structures, and the first included angle α is the angle formed by the axis of the first rear frame 1121 and the horizontal plane 101. It can be understood that the second included angle β is the angle formed by the axis of the first front frame 1111 and the horizontal plane 101.

[0044] Optionally, if the first rear frame 1121 is an arc-shaped tubular structure, the extension direction of the first rear frame 1121 is the direction of the line connecting the centers of its two ends. The rear frame 112 also includes a second rear frame 1122, which is connected to the end of the first rear frame 1121 opposite to the front frame 111 and extends substantially along the height direction of the frame 11. The second rear frame 1122 is used to support the seat of the electric two-wheeled vehicle 100. The first end of the first rear frame 1121 is connected to the second connecting part 113, and the rear end of the first rear frame 1121 is connected to the second rear frame 1122.

[0045] Optionally, if the first front frame 1111 is an arc-shaped tubular structure, the extending direction of the first front frame 1111 is the direction of the line connecting the centers of its two ends. The front frame 111 also includes a third front frame 1113, which is connected to the end of the first front frame 1111 opposite to the second front frame 1112, and the extending direction of the third front frame 1113 is substantially parallel to the length direction of the frame 11. The body panel 16 includes a foot pedal 161 for the driver to step on (see...). Figure 1 The third front frame 1113 is used to support the foot pedal 161. The first end of the first front frame 1111 is connected to the third front frame 1113, and the rear end of the first front frame 1111 is connected to the second front frame 1112.

[0046] In one implementation, at least a portion of the second front frame 1112 and at least a portion of the first rear frame 1121 are tubular. Specifically, the main body of the second front frame 1112 and the main body of the first rear frame 1121 are tubular. The second front frame 1112 and the first rear frame 1121 are coaxial, both being straight tubular structures with their axes coinciding. The second front frame 1112 and the first rear frame 1121 are interlocked and fitted together.

[0047] Specifically, the second connecting part 113 is a columnar structure, and the outer contour of the second connecting part 113 is adapted to the inner contour of the first rear frame 1121, so that the second connecting part 113 passes through the first rear frame 1121.

[0048] Optionally, the end of the first rear frame 1121 passes through the second front frame 1112 and is located at the junction of the first front frame 1111 and the second front frame 1112. The outer diameter of the first rear frame 1121 is smaller than the outer diameter of the first front frame 1111. Specifically, the beams on the rear frame 112 are thinner than the beams on the front frame 111. It should be noted that in related technologies, in order to ensure the structural strength and torsional strength of the frame, the front frame is usually a double-beam frame, that is, viewed from left to right, the front frame includes two beams extending forward and backward arranged vertically. The rear frame requires lower torsional strength and does not need to be provided with two beams. Moreover, the beams of the rear frame are usually integrally formed with the upper beam of the front frame and have the same outer diameter. In this embodiment, the front frame 111 is a single-beam frame, meaning that when viewed from left to right, the front frame 111 consists of only one beam extending forward and backward. To ensure the structural strength of this single beam, in this embodiment, the single beam is made relatively thick, that is, both the first front frame 1111 and the second front frame 1112 are made relatively thick. The rear frame 112 requires lower torsional strength, so the beams on the rear frame 112 can be made thinner, that is, the first rear frame 1121 is made thinner, and its outer diameter is smaller than the outer diameter of the first front frame 1111 and also smaller than the outer diameter of the second front frame 1112. With this arrangement, it is equivalent to reducing the overall weight of the frame 11 by making the beams on the rear frame 112 thinner than the beams on the front frame 111, provided that the structural strength and torsional strength of the entire frame 11 are sufficient.

[0049] In one implementation, the rear suspension 132 includes a swingarm pin 1323 and a shock absorber pin 1324. The first connecting portion 114 has a through hole (not shown) along the width direction of the frame 11. The swingarm pin 1323 can pass through the rear swingarm 1321 and the through hole along the width direction of the frame 11. The rear swingarm 1321 is rotatably connected to the first connecting portion 114 via the swingarm pin 1323. The rear shock absorber 1322 is rotatably connected to the second rear frame 1122 via the shock absorber pin 1324. Viewed along the extension direction of the centerline of the first rear frame 1121, the first rear frame 1121 and the swingarm pin 1323 at least partially overlap, and the first rear frame 1121 and the shock absorber pin 1324 at least partially overlap.

[0050] Specifically, if the first rear frame 1121 is a straight tubular structure, the extension direction of the axis of the first rear frame 1121 is the extension direction of the first rear frame 1121, and the axis of the first rear frame 1121 passes through the swingarm pin 1323 and the shock absorber pin 1324. If the first rear frame 1121 is an arc-shaped tubular structure, it has a circular mounting port that connects with the second connecting part 113, and the center line of the mounting port passes through the swingarm pin 1323, wherein the center line of the mounting port is the axis of the first rear frame 1121.

[0051] As one implementation, a reinforcing plate 115 is provided at the connection between the second front frame 1112 and the first rear frame 1121. The first portion 1151 of the reinforcing plate 115 is attached to and fixed to the outer peripheral wall of the second front frame 1112, and the second portion 1152 of the reinforcing plate 115 is attached to and fixed to the outer peripheral wall of the first rear frame 1121. The reinforcing plate 115 provides additional protection and reinforcement for the detachable connection structure between the front frame 111 and the rear frame 112, preventing loosening or scratches at the connection between the second front frame 1112 and the first rear frame 1121 due to vibration or impact, and effectively improving the overall rigidity and fatigue resistance of the connection between the second front frame 1112 and the first rear frame 1121. In addition, the reinforcing plate 115 can play a positioning role when the front frame 111 and the rear frame 112 are connected.

[0052] like Figure 5 and Figure 6 As shown, a longitudinal plane 102 is defined perpendicular to the width direction of the frame 11, and the longitudinal plane 102 coincides with the width center point of the frame 11. The width center point indicates that the distance from this point to the left and right sides of the frame 11 is equal. The steering system 14 also includes a balance block 142, which is connected to the handlebar tube 141 and located at the end of the handlebar tube 141 away from the longitudinal plane 102.

[0053] like Figure 7 and Figure 8 As shown, in one implementation, at least a portion of the balance block 142 is inserted into the handle tube 141. The balance block 142 includes an inner section 1421 and an outer section 1422, which are connected. The handle tube 141 is a hollow tubular member with a receiving space 1411. An end of the handle tube 141 forms a mounting hole 1412 communicating with the receiving space 1411. The receiving space 1411 communicates with the outside through the mounting hole 1412. The inner section 1421 is located within the mounting hole 1412, or the inner section 1421 passes through the mounting hole 1412 and extends into the receiving space 1411, while the outer section 1422 is located outside the mounting hole 1412.

[0054] like Figure 6 and Figure 8As shown, the end of the handle tube 141 forms a fitting end face 1413 surrounding the mounting hole 1412, and the fitting end face 1413 is perpendicular to the center line 103 of the mounting hole 1412. Exemplarily, the mounting hole 1412 is a circular hole, and the center line 103 of the mounting hole 1412 passes through its center. The outer tube section 1422 has an outer peripheral wall 1422a surrounding the center line 103 of the mounting hole 1412, and the outer peripheral wall 1422a of the outer tube section 1422 is perpendicular to the fitting end face 1413. A weld zone is provided between the outer peripheral wall 1422a of the outer tube section 1422 and the fitting end face 1413. The weld zone is provided around the center line 103 of the mounting hole 1412, and a weld portion 1423 is fixed on the weld zone, the weld portion 1423 being provided along the extending direction of the weld zone. The weld portion 1423 is connected to the outer peripheral wall 1422a, and the weld portion 1423 is also connected to the end face 1413 of the pipe fitting.

[0055] It should be noted that the weld section 1423 refers to the joint or seam formed after the end of the handle tube 141 and the outer section 1422 are heated, melted or pressurized, so that the end of the handle tube 141 and the outer section 1422 are metallurgically combined and then cooled and solidified.

[0056] With the above settings, the length of the tube section 1421 embedded in the mounting hole 1412 is shorter in the extension direction of the center line 103 of the mounting hole 1412, thereby reducing the volume and weight of the balance block 142. In addition, during the welding process, the handle tube 141 can limit the balance block 142 in the direction perpendicular to the center line 103 of the mounting hole 1412, thereby improving the stability of the balance block 142 during the welding process.

[0057] As one implementation method, a preset plane 104 is defined that is perpendicular to the center line 103 of the mounting hole 1412 (see...). Figure 6 The orthographic projections of the weld portion 1423 and the pipe end face 1413 on the preset plane 104 are both annular, and the outer diameter of the projection of the weld portion 1423 is basically equal to the outer diameter of the projection of the pipe end face 1413.

[0058] It should be noted that during the process of connecting the end face 1413 of the pipe fitting to the outer peripheral wall 1422a through the weld portion 1423, the outer edge of the weld portion 1423 may be uneven. This can be achieved by grinding the outer edge of the weld portion 1423 to make it a uniform and continuous arc shape, that is, the outer diameter of the projected weld portion 1423 is basically equal to the outer diameter of the projected pipe fitting end face 1413.

[0059] In one implementation, the inner diameter of the orthographic projection of the weld portion 1423 on the preset plane 104 is greater than or equal to the inner diameter of the orthographic projection of the pipe end face 1413 on the preset plane 104, and the inner diameter of the orthographic projection of the weld portion 1423 is less than the outer diameter of the orthographic projection of the pipe end face 1413.

[0060] Specifically, the outer peripheral wall 1422a of the outer pipe section 1422 is arranged around the center line 103 of the mounting hole 1412, forming a circular area that covers a portion of the pipe end face 1413. It can be seen that the outer pipe section 1422 is cylindrical, and the diameter of the circular area is the diameter of the outer pipe section 1422, which is essentially the same as the inner diameter of the orthographic projection of the weld portion 1423. When the balance block 142 is connected to the handle pipe 141, the outer pipe section 1422 and the pipe end face 1413 are in contact along the extension direction of the center line 103 of the mounting hole 1412, and the connection is a surface contact. During welding, this prevents the balance block 142 from shifting relative to the handle pipe 141 along the extension direction of the center line 103 of the mounting hole 1412.

[0061] As one implementation, the area of ​​the orthographic projection of the weld portion 1423 on the preset plane 104 is not less than the area of ​​the orthographic projection of the pipe end face 1413 on the preset plane 104.

[0062] Specifically, the balance block 142 is cylindrical, and the diameter of its outer section 1422 is the same as the diameter of its inner section 1421. The area of ​​the weld portion 1423 projected onto the preset plane 104 is equal to the area of ​​the end face 1413 of the pipe fitting projected onto the preset plane 104.

[0063] like Figure 9 As shown, optionally, the steering system 14 also includes a mounting plate 143, which is located within the mounting hole 1412 and fixedly connected to the inner wall of the handle tube 141. The mounting plate 143 is a circular metal plate with a limiting hole 1431 extending through itself along the extension direction of the center line 103 of the mounting hole 1412. The balance block 142 is cylindrical, with the diameter of its outer section 1422 matching the diameter of its inner section 1421, which passes through the limiting hole 1431. The mounting plate 143 has a connecting surface 1432 coplanar with the end face 1413 of the fitting, and the orthographic projection of the connecting surface 1432 onto the preset plane 104 is annular. The weld portion 1423 connects to the connecting surface 1432 and the end face 1413 of the fitting, i.e., the weld portion 1423 completely covers the connecting surface 1432 and the end face 1413 of the fitting. The area of ​​the weld portion 1423 projected onto the preset plane 104 is greater than the area of ​​the end face 1413 of the pipe fitting projected onto the preset plane 104.

[0064] Optionally, the outer section 1422 and the inner section 1421 are columnar structures with different diameters. The diameter of the outer section 1422 is larger than that of the inner section 1421, and the diameter of the outer section 1422 is smaller than the outer diameter of the mounting plate 143. In the extension direction of the centerline 103 of the mounting hole 1412, the outer section 1422 is connected to the connecting surface 1432, and the connection is a surface contact. The weld portion 1423 is connected to the connecting surface 1432 and the pipe fitting end face 1413, meaning the weld portion 1423 covers the entire pipe fitting end face 1413 and at least a portion of the connecting surface 1432. The area of ​​the orthographic projection of the weld portion 1423 on the preset plane 104 is greater than the area of ​​the orthographic projection of the pipe end face 1413 on the preset plane 104, and the outer diameter of the orthographic projection of the weld portion 1423 is not greater than the outer diameter of the orthographic projection of the pipe end face 1413, and the inner diameter of the orthographic projection of the weld portion 1423 is not less than the inner diameter of the orthographic projection of the connecting surface 1432.

[0065] like Figure 10 As shown, optionally, the steering system 14 also includes multiple mounting plates 143, all located within mounting holes 1412 and fixedly connected to the inner wall of the handle tube 141. The mounting plates 143 are fan-shaped metal plates, and the multiple mounting plates 143 are arranged around the centerline 103 of the mounting holes 1412. A limiting channel 1433 is formed by the multiple mounting plates 143, and the inner section 1421 passes through the limiting channel 1433. Each mounting plate 143 has a connecting surface 1432 that is coplanar with the end face 1413 of the tube. The orthographic projections of the connecting surfaces 1432 of each of the multiple mounting plates 143 onto the preset plane 104 form a ring shape, and the weld portion 1423 connects to the connecting surface 1432 and the end face 1413 of the tube. The outer diameter of the orthographic projection of the weld portion 1423 is not greater than the outer diameter of the orthographic projection of the pipe end face 1413, and the inner diameter of the orthographic projection of the weld portion 1423 is not less than the inner diameter of the orthographic projection of the connecting surface 1432.

[0066] With the above settings, the mounting plate 143 can limit the balance block 142 in the direction perpendicular to the center line 103 of the mounting hole 1412, and increases the area of ​​the orthographic projection of the weld portion 1423, thereby improving the stability of the connection between the balance block 142 and the handle tube 141.

[0067] like Figure 11As shown, in one implementation, along the extension direction of the centerline 103 of the mounting hole 1412, the ratio of the length L1 of the outer section 1422 to the length L2 of the balance block 142 ranges from 0.18 to 0.26. Further, the ratio of the length L1 of the outer section 1422 to the length L2 of the balance block 142 ranges from 0.19 to 0.24. More preferably, the ratio of the length L1 of the outer section 1422 to the length L2 of the balance block 142 is 0.22. It should be noted that, given a fixed length L2 of the balance block 142, if the ratio of the length L1 of the outer section 1422 to the length L2 of the balance block 142 is too large, the length L3 of the inner section 1421 passing through the mounting hole 1412 will be too short. This will prevent the handle tube 141 from limiting the inner section 1421 in a direction perpendicular to the center line 103 of the mounting hole 1412, potentially causing the balance block 142 to detach from the handle tube 141 during welding. If the ratio of the length L1 of the outer section 1422 to the length L2 of the balance block 142 is too small, the contact area between the weld portion 1423 and the outer peripheral wall 1422a of the outer section 1422 will be small, resulting in an unstable connection between the weld portion 1423 and the outer section 1422, and a significant risk of the balance block 142 detaching. Through these design choices, the volume and weight of the balance block 142 are reduced while ensuring the stability of the connection between the balance block 142 and the handle tube 141.

[0068] In this embodiment of the application, the inner section 1421 and the outer section 1422 are integrally formed.

[0069] As one implementation, the outer section 1422 and the inner section 1421 are columnar structures with different diameters, with the outer diameter of the inner section 1421 being smaller than that of the outer section 1422. A guide surface 1425 is present at the connection between the inner section 1421 and the outer section 1422, and a limiting surface (not shown) is present at the junction of the inner wall of the handle tube 141 and the end face 1413 of the fitting. The limiting surface abuts against the guide surface 1425. Along the centerline 103 of the mounting hole 1412 and away from the longitudinal plane 102, the shortest distance between the guide surface 1425 and the limiting surface and the centerline 103 of the mounting hole 1412 gradually increases. Through the mutual cooperation between the guide surface 1425 and the limiting surface, when the inner section 1421 is embedded into the mounting hole 1412, the limiting effect of the handle tube 141 on the inner section 1421 in the direction perpendicular to the centerline 103 of the mounting hole 1412 can be improved.

[0070] As one implementation, the balance block 142 also includes a covering portion 1424 (see...). Figure 5The covering portion 1424 is detachably connected to the outer section 1422 and is located on the side of the outer section 1422 away from the inner section 1421. The covering portion 1424 covers at least a portion of the outer section 1422 and the weld portion 1423 along the extension direction of the center line 103 of the mounting hole 1412. This prevents the weld portion 1423 from being exposed and improves the protective effect on the weld portion 1423.

[0071] like Figure 12 As shown, the electric two-wheeler 100 also includes a lighting system 17, which includes a headlight 171 connected to the vehicle body cover 16. The headlight 171 can be located at the front of the electric two-wheeler 100 or at the rear of the electric two-wheeler 100.

[0072] like Figure 13 As shown, in one implementation, a rotating member 162 is connected to the body panel 16. The rotating member 162 extends along the width direction of the frame 11, and its end away from the body panel 16 is connected to the lighting lamp 171. The lighting lamp 171 can rotate around the rotating member 162.

[0073] like Figure 13 and Figure 14 As shown, the lighting system 17 also includes a positioning structure 172, which includes a first positioning part 1721, a second positioning part 1722, and a positioning member 1723. The first positioning part 1721 is connected to the lighting lamp 171, the second positioning part 1722 is connected to the body panel 16, and the positioning member 1723 is connected to the first positioning part 1721. When the positioning member 1723 moves to abut against the second positioning part 1722, the positioning member 1723 can restrict the rotation of the lighting lamp 171.

[0074] For example, one of the first positioning part 1721 and the second positioning part 1722 is engraved with a scale value representing the light emission angle of the lamp 171. Each scale value corresponds to a different light emission angle of the lamp 171. The other of the first positioning part 1721 and the second positioning part 1722 has a scale mark. The light emission angle of the lamp 171 refers to the angle between the light emitted by the lamp 171 and the horizontal plane 101. If it is necessary to adjust the light emission angle of the lamp 171, the scale mark is aligned with the scale corresponding to the light emission angle of the lamp, and the positioning member 1723 is moved to press against the first positioning part 1721 and / or the second positioning part 1722 to fix the light emission angle of the lamp 171.

[0075] In this embodiment of the application, the lighting lamp 171 has a rotation center line 1711 parallel to the extension direction of the rotating member 162, and the lighting lamp 171 is capable of rotating about the rotation center line 1711 relative to the vehicle body cover 16.

[0076] The above-mentioned configuration reduces the number of parts required to adjust the light output angle of the lamp 171. Furthermore, the positioning structure 172 and the rotating component 162 are both located between the body panel 16 and the lamp 171, making the lamp 171 and its peripheral components smaller and easier to install.

[0077] As an alternative implementation, the positioning member 1723 is connected to the second positioning part 1722. When the end of the positioning member 1723 near the first positioning part 1721 is pressed against the side wall of the first positioning part 1721, the positioning member 1723 can restrict the lighting lamp 171 from rotating around the rotation center line 1711.

[0078] Specifically, the positioning member 1723 can pass through the second positioning part 1722 and the first positioning part 1721 in sequence. When the positioning member 1723 is only connected to the second positioning part 1722, the first positioning part 1721 can rotate relative to the second positioning part 1722 around the rotation center line 1711. When the positioning member 1723 is connected to the second positioning part 1722 and abuts against the side wall of the first positioning part 1721, the positioning member 1723 can restrict the lighting lamp 171 from rotating around the rotation center line 1711.

[0079] With the above settings, the positioning structure 172 can limit the position of the lighting lamp 171 in different ways, thereby improving the flexibility of the lighting lamp 171 assembly.

[0080] In one implementation, the body panel 16 includes a mounting groove 163 for accommodating a lighting lamp 171, a second positioning part 1722 connected to the mounting groove 163 and located within the mounting groove 163, one end of a first positioning part 1721 connected to the lighting lamp 171, and the other end of the first positioning part 1721 extending in the direction of the second positioning part 1722, and at least a portion of a positioning member 1723 located within the mounting groove 163 and passing through the first positioning part 1721 and the second positioning part 1722.

[0081] Specifically, taking the front light 171 of the electric two-wheeler 100 as an example, the mounting groove 163 has a slot facing the front of the electric two-wheeler 100, and the light 171 is embedded in the mounting groove 163 through the slot. The second positioning part 1722 is connected to the inner wall of the mounting groove 163, and a connecting hole 1722a is provided on the second positioning part 1722, which can be a threaded hole.

[0082] The first positioning part 1721 has a plurality of adjustment holes 1721a extending through itself in a direction perpendicular to the rotation center line 1711. The plurality of adjustment holes 1721a are arranged around the rotation center line 1711. The positioning member 1723 can be inserted through any one of the plurality of adjustment holes 1721a in a direction perpendicular to the rotation center line 1711. Each adjustment hole 1721a corresponds to a light emission angle of the lighting lamp 171. For example, during the process of adjusting the light emission angle of the lighting lamp 171, any one of the plurality of adjustment holes 1721a is aligned with the connecting hole 1722a, that is, when viewed along the extension direction of the center line of the connecting hole 1722a, one of the adjustment holes 1721a overlaps with the connecting hole 1722a. Further, the positioning member 1723 is inserted through the first positioning part 1721 and the second positioning part 1722 to restrict the rotation of the lighting lamp 171 around the rotation center line 1711.

[0083] Optionally, the adjustment hole 1721a is elongated, and its extension path is arranged around the rotation center line 1711. The positioning member 1723 can pass through the adjustment hole 1721a in a direction perpendicular to the rotation center line 1711. When the lighting lamp 171 rotates around the rotation center line 1711, the positioning member 1723 can move relative to the adjustment hole 1721a along its extension path. For example, during the adjustment of the light emission angle of the lighting lamp 171, by adjusting the positioning member 1723, a certain gap is formed between the first positioning part 1721 and the second positioning part 1722, allowing the first positioning part 1721 to rotate relative to the second positioning part 1722 around the rotation center line 1711. Since at least a portion of the positioning member 1723 is threadedly connected to the connecting hole 1722a, the positioning member 1723 and the second positioning part 1722 remain relatively stationary. The first positioning part 1721 can move relative to the positioning member 1723 along the extension path of the adjustment hole 1721a, that is, the positioning member 1723 moves relative to the adjustment hole 1721a. By pre-tightening the positioning member 1723, the positioning member 1723 is pressed against the first positioning part 1721 to eliminate the gap between the first positioning part 1721 and the second positioning part 1722, and to limit the rotation of the lighting lamp 171 about the rotation center line 1711.

[0084] like Figure 15 As shown, in one implementation, the first positioning part 1721 includes a connecting plate 1721b and a connecting post 1721c connected to the connecting plate 1721b. The adjustment hole 1721a is located on the connecting plate 1721b. The end of the connecting post 1721c away from the connecting plate 1721b is connected to the lighting lamp 171. When the lighting lamp 171 rotates around the rotation center line 1711, the part where the connecting plate 1721b and the connecting post 1721c are in contact can produce elastic deformation.

[0085] Specifically, the extension direction of the connecting post 1721c is basically parallel to the height direction of the frame 11. The connecting post 1721c is provided with reinforcing ribs to improve the structural strength of the connecting post 1721c and prevent fatigue damage caused by elastic deformation of the connecting plate 1721b and / or the connecting post 1721c.

[0086] Furthermore, both the connecting plate 1721b and the connecting post 1721c are arranged in the space formed by the mounting groove 163. When viewed along the extension direction of the connecting post 1721c, the adjusting hole 1721a does not overlap with the connecting post 1721c. With the above arrangement, interference between the fastener and the connecting post 1721c is avoided when the fastener passing through the adjusting hole 1721a is loosened or pre-tightened.

[0087] In one implementation, the rotating component 162 is a lug, one end of which is connected to the lighting lamp 171 and the other end of which is connected to the body panel 16. When the lighting lamp 171 rotates around the rotation center line 1711, at least a portion of the lug can undergo elastic deformation and twist around the rotation center line 1711.

[0088] Specifically, the ear plate is elongated and extends along the width of the frame 11, with its extension direction coinciding with the extension direction of the rotation center line 1711. Optionally, the ear plate is integrally formed with the lighting lamp 171, and the end of the ear plate facing away from the lighting lamp 171 is detachably connected to the body panel 16. Since the rotation of the lighting lamp 171 depends on the elastic deformation of the ear plate itself, integrating the ear plate into the lighting lamp 171 facilitates the replacement or maintenance of the ear plate.

[0089] In this embodiment, there are two ear plates, which are distributed on the left and right sides of the lighting lamp 171 to balance the torque on the left and right sides of the lighting lamp 171 and prevent the lighting lamp 171 from tilting relative to the horizontal plane 101 when adjusting the light output angle of the lighting lamp 171.

[0090] As an optional implementation, the rotating component 162 is a connecting shaft, the axis of which is collinear with the rotation center line 1711, and the lighting lamp 171 is rotatably connected to the connecting shaft.

[0091] Specifically, the connecting shaft is integrally formed with the body panel 16, and the left and right sides of the lighting lamp 171 are respectively provided with rotating grooves 163 (see Figure 13 The end of the connecting shaft away from the body panel 16 is embedded in the rotating groove 163 and is clearance-fitted with the rotating groove 163.

[0092] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An electric two-wheeled vehicle, comprising: The vehicle frame, which includes the front frame and the rear frame; A walking system, including a rear wheel, the rear wheel being at least partially located under the rear frame; A suspension system including a rear suspension, the rear suspension including a rear swingarm and a rear shock absorber, one end of the rear shock absorber being connected to the rear frame and the other end being connected to the rear swingarm or the rear wheel; The power system is connected to the rear wheel drive. The feature is that the front frame is provided with a first connecting part and a second connecting part distributed along the length direction of the frame, the second connecting part is located behind the first connecting part, the first connecting part connects the front frame to the rear swingarm so that the first connecting part can receive the force load applied from the rear swingarm to the front frame, and the second connecting part connects the front frame to the rear frame.

2. The electric two-wheeled vehicle according to claim 1, characterized in that, The front frame includes a first front frame and a second front frame. The rear end of the first front frame extends rearward and upward. The second front frame is connected to the rear end of the first front frame. The second connecting part is disposed / installed on the second front frame, and the first connecting part is disposed / installed on the first front frame.

3. The electric two-wheeled vehicle according to claim 2, characterized in that, The rear frame includes a first rear frame, which is connected to the second connecting part, and the rear end of the first rear frame extends rearward and upward; the extension direction of the first front frame forms a first angle with the horizontal plane, and the extension direction of the first rear frame forms a second angle with the horizontal plane, the angle of the second angle being greater than the angle of the first angle.

4. The electric two-wheeled vehicle according to claim 3, characterized in that, The first included angle ranges from 19.5° to 23.8°, and the second included angle ranges from 19.8° to 24.2°.

5. The electric two-wheeled vehicle according to claim 3, characterized in that, At least a portion of the second front frame is tubular, at least a portion of the first rear frame is tubular, and the tubular structures of the second front frame and the first rear frame are fitted together and coaxially arranged.

6. The electric two-wheeled vehicle according to claim 5, characterized in that, The end of the tubular structure of the first rear frame passes through the second front frame and is located at the junction of the first front frame and the second front frame; the outer diameter of the tubular structure of the first rear frame is smaller than the outer diameter of the tubular structure of the first front frame.

7. The electric two-wheeled vehicle according to claim 3, characterized in that, The rear suspension includes a swingarm pin, and the rear swingarm is rotatably connected to the first connecting part through the swingarm pin. When viewed along the extension direction of the center line of the tubular structure of the first rear frame, the first rear frame and the swingarm pin at least partially overlap.

8. The electric two-wheeled vehicle according to claim 3, characterized in that, The rear suspension includes a shock absorber pin, and the rear shock absorber is rotatably connected to the rear frame via the shock absorber pin. When viewed along the extension direction of the centerline of the tubular structure of the first rear frame, the first rear frame and the shock absorber pin at least partially overlap.

9. The electric two-wheeled vehicle according to claim 8, characterized in that, The rear frame also includes a second rear frame, which is connected to the end of the first rear frame away from the front frame and extends substantially along the height direction of the frame. The rear shock absorber is rotatably connected to the second rear frame via the shock absorber pin.

10. The electric two-wheeled vehicle according to claim 3, characterized in that, A reinforcing plate is provided at the connection between the second front frame and the first rear frame. The first part of the reinforcing plate is attached to and fixed to the outer peripheral wall of the second front frame, and the second part of the reinforcing plate is attached to and fixed to the outer peripheral wall of the first rear frame.

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