Electric two-wheeled vehicle

Abstract

The application discloses an electric two-wheeled vehicle, which comprises a frame, a walking system, a transmission system, a power system and a suspension system. The walking system comprises a rear wheel. The power system comprises an electric motor. The transmission system comprises a transmission belt. The electric motor drives the rear wheel to rotate through the transmission belt. The suspension system comprises a rear fork. The rear fork comprises a middle connecting arm and two side connecting arms. The two side connecting arms are arranged in a width direction of the electric two-wheeled vehicle to form an installation space. The electric motor is located in the installation space. The rear fork further comprises a connecting shaft. The connecting shaft penetrates the two side connecting arms. The electric motor is located between the two side connecting arms. The connecting shaft penetrates a shell of the electric motor. The electric two-wheeled vehicle has good transmission performance of the transmission belt.

Description

Technical Field

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

[0002] With the increasing emphasis on environmental protection and energy conservation in society, electric two-wheelers, as a green, energy-saving, and emission-reducing mode of transportation, are playing an increasingly important role in public transportation.

[0003] Currently, electric two-wheelers are becoming increasingly smaller and lighter, resulting in less space and a more compact arrangement of the power and transmission systems. Electric two-wheelers typically use a belt for power transmission. In traditional designs, the motor housing is usually rigidly fixed to the frame, while the rear wheel is hinged to the frame via a rear swingarm. When the rear swingarm swings due to road bumps or load changes during vehicle operation, the relative position between the rear wheel and the motor dynamically changes. This change affects the belt tension and thus the power transmission efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides an electric two-wheeled vehicle with better belt drive performance.

[0005] This application provides an electric two-wheeled vehicle, including a frame, a body panel, a running system, a power system, a transmission system, and a suspension system; the body panel is at least partially disposed on the frame; the running system includes a front wheel and a rear wheel; the power system includes a motor; the transmission system includes a transmission belt, and the motor drives the rear wheel to rotate through the transmission belt; the suspension system includes a rear swingarm, which is disposed on the frame; wherein, the rear swingarm includes a middle connecting arm and two side connecting arms, the two side connecting arms are rotatably connected to the rear wheel respectively, the middle connecting arm connects the two side connecting arms, and the middle connecting arm is connected to the frame; the two side connecting arms are spaced apart along the width direction of the electric two-wheeled vehicle to form an installation space, and the motor is located in the installation space; the rear swingarm also includes a connecting shaft, the connecting shaft passes through the two side connecting arms, the motor is located between the two side connecting arms, and the connecting shaft passes through the motor housing.

[0006] In at least one embodiment, the mounting component includes a first mounting part and a second mounting part. The number of connecting shafts is the same as the number of mounting components and they correspond one-to-one. The first mounting part is disposed on one side connecting arm, and the second mounting part is disposed on the other side connecting arm. The connecting shaft is detachably passed through the corresponding first mounting part, second mounting part, and motor. There are three mounting components. The first mounting part and the second mounting part in each mounting component are disposed opposite to each other along the width direction of the electric two-wheeler. When viewed from the left side of the electric two-wheeler, the line connecting the first mounting parts is arranged in a triangle.

[0007] In at least one embodiment, the first mounting part is provided with a first mounting hole, the second mounting part is provided with a threaded hole, the motor is provided with a second mounting hole, the first mounting hole and the second mounting hole are through holes, the number of second mounting holes is the same as the number of mounting parts and they correspond one-to-one, and the connecting shaft passes through the first mounting hole, the second mounting hole and the threaded hole, and is threadedly connected to the threaded hole.

[0008] In at least one embodiment, at least one connecting shaft includes a first shaft portion and a first head. The first head is connected to one end of the first shaft portion. The cross-section of the first head is larger than the cross-section of the first shaft portion. The first shaft portion passes through a corresponding first mounting hole, a second mounting hole, and a threaded hole. The first head is located outside the first mounting hole and abuts against the side of the first mounting portion away from the second mounting portion.

[0009] In at least one embodiment, an assembly gap is formed between the first mounting part and the motor.

[0010] In at least one embodiment, at least one connecting shaft includes a second head and a second shaft portion, the second head being connected to one end of the second shaft portion, and the cross-section of the second head being larger than the cross-section of the second shaft portion; the second shaft portion is disposed in a corresponding second mounting hole and a threaded hole, the second head is disposed in a first mounting hole, and the second head abuts against the side of the motor facing the first mounting portion.

[0011] In at least one embodiment, the transmission system includes a drive wheel that is connected to the output shaft of a motor, and a drive belt that connects the drive wheel to the rear wheel. The drive wheel drives the rear wheel to rotate via the drive belt.

[0012] In at least one embodiment, the drive wheel is located in the installation space and is disposed between one of the side connecting arms and the motor. One of the side connecting arms is provided with a hollow portion, and the drive wheel is exposed through the hollow portion when viewed along the width direction of the electric two-wheeled vehicle.

[0013] In at least one embodiment, the diameter of the hollowed-out portion is D1, the diameter of the drive wheel is D2, and 10mm≤D2-D1≤20mm.

[0014] In at least one embodiment, the rear swingarm is integrally molded.

[0015] The electric two-wheeled vehicle in this embodiment of the application, by mounting the motor in the mounting space of the rear swingarm via a connecting shaft, reduces the space occupied by the motor on the frame and improves the structural compactness of the motor and the rear swingarm; on the other hand, since both the motor and the rear wheel are connected to the rear swingarm, the relative position of the rear wheel and the motor is not easily changed during driving, which helps to ensure the transmission performance of the drive belt. Attached Figure Description

[0016] Figure 1This is a perspective view of the electric two-wheeled vehicle in the embodiments of this application.

[0017] Figure 2 This is a schematic diagram of the assembly structure of the frame and rear swingarm in an embodiment of this application.

[0018] Figure 3 This is a structural schematic diagram of the rear swingarm and motor assembly state in an embodiment of this application.

[0019] Figure 4 This is a perspective view of the rear flat fork according to an embodiment of this application.

[0020] Figure 5 This is a left view of the rear swingarm and motor assembly state in an embodiment of this application.

[0021] Figure 6 This is a cross-sectional view of the rear horizontal fork in an embodiment of this application.

[0022] Figure 7 This is a partial cross-sectional view illustrating the relationship between the connecting shaft and the motor, as shown in the embodiment of this application. Detailed Implementation

[0023] In the description of the embodiments in this application, the words "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary," "or," and "for example" is intended to present the relevant concepts in a specific manner.

[0024] 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 to which this application belongs. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the embodiments and features described below can be combined with each other.

[0026] like Figure 1 As shown, an embodiment of this application provides an electric two-wheeled vehicle. It can be understood that... Figure 1 The electric two-wheeler shown is an electric-powered motorcycle.

[0027] See Figures 1 to 3In some embodiments, the electric two-wheeled vehicle 100 includes a frame 10, a body panel 20, a running system 30, a power system 40, a suspension system 50, and a transmission system 60. The body panel 20 is at least partially disposed on the frame 10. The running system 30 includes a front wheel 31 and a rear wheel 32. The power system 40 includes a motor 41, and the transmission system 60 includes a drive belt 62. The motor 41 drives the rear wheel 32 to rotate via the drive belt 62. The suspension system 50 includes a front suspension (not shown) and a rear swingarm 51. The front wheel 31 is rotatably connected to the frame 10 via the front suspension. The rear swingarm 51 is disposed on the frame 10, and the rear wheel 32 is rotatably connected to the rear swingarm 51 so that the rear wheel 32 can drive the entire vehicle by rotation.

[0028] Understandably, a rotary connection can be achieved through a rotary connector, allowing two components to rotate relative to each other. In the embodiments of this application, the type of rotary connector is not specifically limited. For example, a rotary connector may include, but is not limited to, bearings, couplings, pins, etc.

[0029] To clearly illustrate the technical solution of this application, the following are also defined: Figure 1 The directions shown are front, back, left, right, up, and down. In this embodiment, the front, back, left, right, up, and down directions refer to the directions when the electric two-wheeled vehicle 100 is on a horizontal plane. The front-back direction refers to the length direction of the electric two-wheeled vehicle 100 provided in this application. The left-right direction refers to the width direction of the electric two-wheeled vehicle 100 provided in this application. The up-down direction refers to the height direction of the electric two-wheeled vehicle 100 provided in this application.

[0030] In some embodiments, the frame 10 is substantially symmetrical about the left and right when viewed along the length of the electric two-wheeler 100, which helps the vehicle maintain balance during driving.

[0031] See Figure 3 and Figure 4In some embodiments, the rear swingarm 51 includes a central connecting arm 512, two side connecting arms 511, and at least two mounting members 513. The two side connecting arms 511 are rotatably connected to the rear wheel 32, and are spaced apart along the width direction of the electric two-wheeler 100 to form a mounting space 514. The central connecting arm 512 connects the two side connecting arms 511 and is also connected to the frame 10. The motor 41 is located in the mounting space 514. Mounting component 513 includes a first mounting portion 5131 and a second mounting portion 5132. The rear swingarm 51 also includes a connecting shaft 515, which is detachably threaded through two of the side connecting arms 511. A motor 41 is located between the two side connecting arms 511, and the connecting shaft 515 passes through the housing 412 of the motor 41. The number of connecting shafts 515 is the same as the number of mounting components 513, and they correspond one-to-one. The first mounting portion 5131 is located on one of the side connecting arms 511, and the second mounting portion 5132 is located on the other side connecting arm 511. The connecting shaft 515 is detachably threaded through the corresponding first mounting portion 5131, second mounting portion 5132, and motor 41. For example, the two side connecting arms 511 are a left connecting arm 5111 and a right connecting arm 5112, with the first mounting portion 5131 located on the right connecting arm 5112 and the second mounting portion 5132 located on the left connecting arm 5111. In other embodiments, the first mounting part 5131 may be disposed on the left connecting arm 5111, and the second mounting part 5132 may be disposed on the right connecting arm 5112.

[0032] The motor 41 is mounted on the mounting space 514 of the rear swingarm 51 via the connecting shaft 515. This reduces the space occupied by the motor 41 on the frame 10, improving the structural compactness of the motor 41 and the rear swingarm 51. Furthermore, since both the motor 41 and the rear wheel 32 are connected to the rear swingarm 51, the relative position of the rear wheel 32 and the motor 41 is not easily changed during operation, thus ensuring the transmission performance of the drive belt 62 between the motor 41 and the rear wheel 32. Additionally, the detachable mounting of the connecting shaft 515 facilitates the installation and maintenance of the motor 41.

[0033] In some embodiments, there is no other structure between the two side connecting arms 511 except for the fixedly connected intermediate connecting arm 512, so that there is a large space between the two side connecting arms 511 to accommodate a high-power, irregularly shaped motor 41.

[0034] See Figure 3 and Figure 5 In some embodiments, three mounting parts 513 are provided. The first mounting part 5131 and the second mounting part 5132 in each mounting part 513 are arranged opposite to each other along the width direction of the electric two-wheeler 100. When viewed from the left side of the electric two-wheeler 100, the line connecting the first mounting parts 5131 is arranged in a triangle.

[0035] The three mounting parts 513, the two side connecting arms 511 and the connecting shaft 515 cooperate to form a triangular prism-shaped frame support structure for the motor 41. This not only restricts the swaying of the motor 41, but also helps to disperse the force of the motor 41 on the rear horizontal fork 51, reduce the problem of stress concentration causing local breakage of the rear horizontal fork 51, and improve the support stability of the rear horizontal fork 51 for the motor 41.

[0036] See Figures 3 to 5 In some embodiments, viewed from above the electric two-wheeler 100, one mounting member 513 is located at the front of the rear swingarm 51; relative to the mounting member 513 at the front of the rear swingarm 51, the other two mounting members 513 are closer to the rear wheel 32. The three mounting members 513 form a triangular support structure, thereby improving the support stability of the motor 41.

[0037] See Figure 3 and Figure 4 In some embodiments, the first mounting portion 5131 is provided with a first mounting hole 5131a, and the second mounting portion 5132 is provided with a threaded hole 5132b, such as... Figure 7 As shown, the housing 412 of the motor 41 is provided with a second mounting hole 411. The first mounting hole 5131a and the second mounting hole 411 are through holes. The number of second mounting holes 411 and mounting parts 513 are the same and correspond one-to-one. The connecting shaft 515 passes through the first mounting hole 5131a, the second mounting hole 411 and the threaded hole 5132b, and is threadedly connected to the threaded hole 5132b.

[0038] The connecting shaft 515 passes through the first mounting hole 5131a, the second mounting hole 411, and the threaded hole 5132b, allowing the motor 41 to be detachably fixed to the mounting space 514 of the rear swingarm 51. However, when disassembly is required, the connecting shaft 515 is rotated to disengage it from the threaded hole 5132b, allowing the connecting shaft 515 to be removed from the first mounting hole 5131a and the second mounting hole 411, thereby removing the motor 41 from the mounting space 514.

[0039] See Figure 3 and Figure 4 In some embodiments, the side connecting arms 511 extend along the length of the electric two-wheeler 100, and the middle connecting arm 512 extends perpendicular to the side connecting arms 511, that is, the middle connecting arm 512 extends along the width of the electric two-wheeler 100, and the connecting shaft 515 extends along the width of the electric two-wheeler 100. This allows the connecting shaft 515 to cooperate with the middle connecting arm 512 to form a frame-type support structure, strengthening the structural stability between the two side connecting arms 511 and providing protection for the motor 41.

[0040] It should be noted that the “vertical” description described in this embodiment is not “vertical” in a strict mathematical sense; it may have a certain angular error, for example, 0 to 5°.

[0041] See Figure 6 and Figure 7 In some embodiments, at least one connecting shaft 515 includes a first shaft portion 5151 and a first head 5152. The first head 5152 is connected to one end of the first shaft portion 5151. The cross-section of the first head 5152 is larger than the cross-section of the first shaft portion 5151. The first shaft portion 5151 passes through a corresponding first mounting hole 5131a and a second mounting hole 411 and a threaded hole 5132b. The first head 5152 is located outside the first mounting hole 5131a and abuts against the side of the first mounting portion 5131 away from the second mounting portion 5132.

[0042] After the first shaft portion 5151 is threadedly connected to the threaded hole 5132b, the first head 5152 can apply a force toward the first mounting portion 5131 to the second mounting portion 5132, thereby realizing the connection between the first mounting portion 5131 and the second mounting portion 5132 and strengthening the structural strength of the rear flat fork 51.

[0043] For example, one of the mounting parts 513 is located on the lower side of the motor 41, and the connecting shaft 515 that mates with the mounting part 513 located on the lower side of the motor 41 includes a first shaft portion 5151 and a first head 5152. The mounting part 513 on the lower side of the motor 41 is subjected to greater force, and the structural strength at the positions of the first mounting portion 5131 and the second mounting portion 5132 is improved by the reinforcement of the connecting shaft 515.

[0044] See Figure 6 In some embodiments, an assembly gap 53 is formed between the first mounting part 5131 and the motor 41. That is, the distance of the mounting space 514 along the width direction of the electric two-wheeler 100 is greater than the width of the motor 41. This makes it possible for the motor 41 to have a certain space between the motor 41 and the rear horizontal fork 51 when the motor 41 is assembled in the mounting space 514, so that the motor 41 can enter the mounting space 514.

[0045] See Figure 6 In some embodiments, at least one connecting shaft 515 includes a second head 5154 and a second shaft portion 5153. The second head 5154 is connected to one end of the second shaft portion 5153, and the cross-section of the second head 5154 is larger than the cross-section of the second shaft portion 5153. The second shaft portion 5153 passes through a corresponding second mounting hole 411 and a threaded hole 5132b, and the second head 5154 passes through a first mounting hole 5131a. The second head 5154 abuts against the side of the motor 41 facing the first mounting portion 5131.

[0046] The second head 5154 abuts against the motor 41, thereby eliminating the assembly gap 53 and the gap caused by manufacturing tolerances, and applying force to the motor 41 so that the other side of the motor 41 can abut against the second mounting part 5132, thereby limiting the displacement of the motor 41 in the width direction of the electric two-wheeler 100 and improving the installation stability of the motor 41.

[0047] For example, the second head 5154 is cylindrical, and the diameter of the second mounting hole 411 is smaller than the diameter of the second head 5154, preventing the second head 5154 from entering the second mounting hole 411. A portion of the second head 5154 extends into the mounting space 514 to abut against the outer surface of the motor 41. The threaded hole 5132b is a through hole, allowing the end of the second shaft portion 5153 away from the head to extend out of the threaded hole 5132b. This facilitates adjusting the relative position of the shaft portion and the threaded hole 5132b so that the second head 5154 can abut against the surface of the motor 41 where the second mounting hole 411 is located, thereby restricting the movement of the motor 41 along the width direction of the electric two-wheeled vehicle 100.

[0048] See Figure 5 In some embodiments, the transmission system 60 includes a drive pulley 61 and a transmission belt 62. The drive pulley 61 is connected to the output shaft of the motor 41, and the transmission belt 62 connects the drive pulley 61 and the rear wheel 32. The drive pulley 61 drives the rear wheel 32 to rotate via the transmission belt 62. Specifically, the transmission system 60 also includes a driven pulley 63, which is coaxially connected to the rear wheel 32, thereby driving the rear wheel 32 to rotate synchronously.

[0049] The motor 41 transmits power to the drive wheel 61 through the output shaft, causing the drive wheel 61 to rotate. The drive wheel 61 then drives the rear wheel 32 to rotate through the transmission belt 62, thereby enabling the vehicle to move.

[0050] See Figure 4 and Figure 5 In some embodiments, the drive wheel 61 is located in the mounting space 514 and is disposed between one of the side connecting arms 511 and the motor 41. One of the side connecting arms 511 has a cutout portion 5111a, through which the drive wheel 61 is exposed when viewed along the width direction of the electric two-wheeled vehicle 100. For example, the drive wheel 61 is disposed between the left connecting arm 5111 and the motor 41, and the cutout portion 5111a is disposed on the left connecting arm 5111.

[0051] The hollowed-out part 5111a makes it easy to remove the drive wheel 61 from the hollowed-out part 5111a, which facilitates the maintenance and replacement of the drive wheel 61.

[0052] See Figure 5In some embodiments, the cutout portion 5111a is a through hole with a diameter of D1 and a diameter of D2 for the drive wheel 61, where 10mm ≤ D2 - D1 ≤ 20mm. Within this range, the cutout portion 5111a is not too small to provide sufficient space for disassembly of the drive wheel 61; and the cutout portion 5111a is not too large to ensure that the side connecting arm 511 has sufficient structural strength.

[0053] In some embodiments, when viewed from the left side of the electric two-wheeler 100, the projection of the transmission belt does not coincide with the projection of the mounting member 513, so that the position of the mounting member 513 avoids the position of the transmission belt, so that when the transmission belt is replaced later, the motor 41 does not need to be disassembled, thus improving the convenience of disassembling the transmission system 60.

[0054] In some embodiments, the rear swingarm 51 is integrally formed. For example, the rear swingarm 51 is integrally cast. Compared with the welded rear swingarm 51, the integral forming method can improve the overall structural strength of the rear swingarm 51 and is relatively easier to design.

[0055] See Figure 4 In some embodiments, the intermediate connecting arm 512 is connected to one end of the two side connecting arms 511 near the front of the electric two-wheeler 100, and the intermediate connecting arm 512 is a hollow tubular structure. The frame 10 includes a connecting rod (not shown), which passes through the intermediate connecting arm 512 and can rotate relative to the intermediate connecting arm 512, thereby realizing the connection between the frame 10 and the rear swingarm 51.

[0056] In addition, those skilled in the art may make other changes within this application. Of course, all such changes made in accordance with this application should be included within the scope disclosed in this application.

Claims

1. An electric two-wheeled vehicle, comprising: Frame; A body panel, at least partially disposed on the vehicle frame; The walking system includes front wheels and rear wheels; The power system includes an electric motor; A transmission system, including a drive belt, wherein the motor drives the rear wheel to rotate via the drive belt; The suspension system includes a rear swingarm; The rear swingarm is characterized in that it includes a middle connecting arm and two side connecting arms, the two side connecting arms being rotatably connected to the rear wheel, the middle connecting arm connecting the two side connecting arms, and the middle connecting arm connecting the frame; the two side connecting arms are spaced apart along the width direction of the electric two-wheeler to form an installation space, and the motor is located in the installation space; The rear swingarm also includes a connecting shaft that passes through the two side connecting arms. The motor is located between the two side connecting arms, and the connecting shaft passes through the motor housing.

2. The electric two-wheeled vehicle as described in claim 1, characterized in that, The rear swingarm also includes mounting components, each comprising a first mounting portion and a second mounting portion. The number of connecting shafts is the same as the number of mounting components and they correspond one-to-one. The first mounting portion is disposed on one of the side connecting arms, and the second mounting portion is disposed on the other side connecting arm. The connecting shaft is detachably passed through the corresponding first mounting portion, the second mounting portion, and the motor. There are three mounting components. In each mounting component, the first mounting portion and the second mounting portion are disposed opposite each other along the width direction of the electric two-wheeler. When viewed from the left side of the electric two-wheeler, the line connecting the first mounting portions forms a triangle.

3. The electric two-wheeled vehicle as described in claim 2, characterized in that, The first mounting part is provided with a first mounting hole, the second mounting part is provided with a threaded hole, the motor is provided with a second mounting hole, the first mounting hole and the second mounting hole are through holes, the number of the second mounting holes is the same as the number of the mounting parts and they correspond one-to-one, the connecting shaft passes through the first mounting hole, the second mounting hole and the threaded hole, and is threadedly connected to the threaded hole.

4. The electric two-wheeled vehicle as described in claim 3, characterized in that, At least one of the connecting shafts includes a first shaft portion and a first head, the first head being connected to one end of the first shaft portion, the cross-section of the first head being larger than the cross-section of the first shaft portion, the first shaft portion passing through the corresponding first mounting hole and second mounting hole and the threaded hole, the first head being located outside the first mounting hole, and the first head abutting against the side of the first mounting portion away from the second mounting portion.

5. The electric two-wheeled vehicle as described in claim 3, characterized in that, An assembly gap is formed between the first mounting part and the motor.

6. The electric two-wheeled vehicle as described in any one of claims 3 to 5, characterized in that, At least one of the connecting shafts includes a second head and a second shaft portion, the second head being connected to one end of the second shaft portion, the cross-section of the second head being larger than the cross-section of the second shaft portion; the second shaft portion passing through the corresponding second mounting hole and the threaded hole, the second head passing through the first mounting hole, and the second head abutting against the side of the motor facing the first mounting portion.

7. The electric two-wheeled vehicle as described in any one of claims 1 to 5, characterized in that, The transmission system includes a drive wheel, which is connected to the output shaft of the motor. A transmission belt connects the drive wheel and the rear wheel, and the drive wheel drives the rear wheel to rotate via the transmission belt.

8. The electric two-wheeled vehicle as described in claim 7, characterized in that, The drive wheel is located in the installation space and is disposed between one of the side connecting arms and the motor. One of the side connecting arms is provided with a hollow part, and when viewed along the width direction of the electric two-wheeled vehicle, the drive wheel is exposed through the hollow part.

9. The electric two-wheeled vehicle as described in claim 8, characterized in that, The hollowed-out portion is a through hole with a diameter of D1 and a diameter of D2 for the drive wheel. 10mm ≤ D2 - D1 ≤ 20mm.

10. The electric two-wheeled vehicle as described in any one of claims 1 to 5, characterized in that, The rear swingarm is integrally molded.

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