Electric motorcycle

Abstract

The invention discloses an electric motorcycle. The electric motorcycle comprises a frame, a motorcycle body covering part, a battery assembly, a motor assembly and a walking system. The vehicle body covering part at least partially covers the vehicle frame. The battery assembly is supported by the frame. The motor assembly is supported by the frame and electrically connected to the battery assembly. The walking system comprises a front walking wheel and a rear walking wheel, and the rear walking wheel is in transmission connection with the motor assembly. The frame comprises an upper cross beam and a lower cross beam, a containing space is formed between the upper cross beam and the lower cross beam, and the battery assembly is installed in the containing space. The battery assembly comprises an upper end face and a lower end face, the upper end face is connected with the upper beam and basically parallel to the extending direction of the upper beam, and the lower end face is connected with the lower beam and basically parallel to the extending direction of the lower beam. The included angle between the extending direction of the upper cross beam and the horizontal plane ranges from 10 degrees to 68 degrees, and / or the included angle between the extending direction of the lower cross beam and the horizontal plane ranges from 10 degrees to 68 degrees. By means of the arrangement, the connection stability of the battery assembly relative to the frame is high.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to an electric motorcycle. Background Art

[0002] Under the background that problems such as energy shortage are becoming increasingly severe, and electric energy gradually replaces gasoline and diesel as the vehicle driving energy due to its advantages of energy conservation and environmental protection, using electric energy as the driving energy has gradually extended from road electric motorcycles to electric motorcycles in various functional scenarios. Different from road electric motorcycles, electric motorcycles in off-road conditions need to frequently perform extreme speed increases, and the energy consumption and exhaust pollution are more serious. In order to further achieve energy conservation and environmental protection, it is particularly important to carry out electrification reforms on electric motorcycles in off-road conditions.

[0003] As the core components of an electric motorcycle, the battery assembly, the electric control components (such as the motor controller) in the electric control system, and the motor assembly, their arrangement methods and positions will affect the off-road performance of the electric motorcycle. The existing electric motorcycles have the following problems: The connection stability of the battery assembly relative to the frame is not high enough, and especially during vehicle off-road, the battery assembly is prone to failure due to connection stability problems. Summary of the Invention

[0004] In view of this, it is necessary to provide an electric motorcycle with relatively high connection stability of the battery assembly relative to the frame and not prone to failure during off-road.

[0005] An embodiment of the present application provides an electric motorcycle, including a frame, a body cover, a battery assembly, a motor assembly, and a running system. The body cover at least partially covers the frame. The battery assembly is supported by the frame. The motor assembly is supported by the frame and electrically connected to the battery assembly. The running system includes a front running wheel and a rear running wheel. The front running wheel and the rear running wheel are both at least partially located below the frame, and the rear running wheel is in transmission connection with the motor assembly. The frame includes an upper cross beam and a lower cross beam. An accommodation space is formed between the upper cross beam and the lower cross beam. The battery assembly is installed in the accommodation space. The battery assembly includes an upper end face and a lower end face. The upper end face is connected to the upper cross beam and is substantially parallel to the extension direction of the upper cross beam. The lower end face is connected to the lower cross beam and is substantially parallel to the extension direction of the lower cross beam. The included angle range between the extension direction of the upper cross beam and the horizontal plane is 10° to 68°, and / or the included angle range between the extension direction of the lower cross beam and the horizontal plane is 10° to 68°.

[0006] Furthermore, the range of the difference between the included angle between the extension direction of the upper cross beam and the horizontal plane and the included angle between the extension direction of the lower cross beam and the horizontal plane is 0° to 6°. The included angle range between the extension direction of the upper cross beam and the horizontal plane is 27° to 30°, and / or the included angle range between the extension direction of the lower cross beam and the horizontal plane is 27° to 30°.

[0007] Furthermore, the electric motorcycle further includes a front suspension assembly. The front driving wheel is connected to the frame through the front suspension assembly. The front suspension assembly includes a front shock absorber. The included angle range between the telescopic direction of the front shock absorber and the direction perpendicular to the upper end face or the lower end face is from 0° to 10°.

[0008] Furthermore, the lower end face includes a front lower side and a rear lower side, and the front lower side is higher than the rear lower side; the upper end face includes a front upper side and a rear upper side, and the front upper side is higher than the rear upper side.

[0009] Furthermore, the frame further includes a lower connecting section. The lower connecting section is connected between the lower cross beam and the front suspension assembly. The end of the lower connecting section away from the lower cross beam is bent forward and upward relative to the lower cross beam; a lower junction is provided at the connection between the lower connecting section and the lower cross beam. The front lower side of the battery assembly is connected to the lower junction.

[0010] Furthermore, when observing along the left - right direction of the frame, the line that is tangent to the outer circle of the rear driving wheel and passes through the lowest point of the frame is defined as the first reference line, and the line that is tangent to the outer circle of the rear driving wheel and passes through the lower junction is defined as the second reference line; the lower junction is located above the first reference line; or the lower junction is located below the first reference line, and the included angle range between the first reference line and the second reference line is from 0° to 10°.

[0011] Furthermore, the frame further includes an upper connecting section. The upper connecting section is connected between the upper cross beam and the front suspension assembly. The end of the upper connecting section away from the upper cross beam is bent forward and downward relative to the upper cross beam; an upper junction is provided at the connection between the upper connecting section and the upper cross beam. The front upper side of the battery assembly is located at the upper junction.

[0012] Furthermore, the electric motorcycle further includes an electric control assembly. The electric control assembly is electrically connected to the motor assembly. The electric control assembly is installed in the accommodation space. The electric control assembly, the battery assembly, and the motor assembly are arranged in sequence from front to back along the extension direction of the upper cross beam or the lower cross beam; a front - side space is formed by the upper connecting section, the lower connecting section, and the battery assembly together, and the electric control assembly is installed in the front - side space.

[0013] Furthermore, when observing from front to back, the height of the lowermost end of the electric control assembly, the height of the lowermost end of the battery assembly, and the height of the lowermost end of the motor assembly decrease in sequence.

[0014] Furthermore, the wheel - axle spacing range of the front driving wheel and the rear driving wheel is from 1000 mm to 1100 mm, and the motor power range in the motor assembly is from 1 kW to 3 kW; in a plane perpendicular to the left - right direction of the frame, there is a gap between the projection of the upper end face and the projection of the upper cross beam, and the width range of the gap is from 30 mm to 60 mm.

[0015] In this application, since the lower end face of the battery assembly is substantially parallel to the extension direction of the lower cross beam and the upper end face is substantially parallel to the extension direction of the upper cross beam, the upper cross beam and the lower cross beam can provide stable limiting and support for the battery assembly. Moreover, since the battery assembly is maintained within a reasonable inclination range, that is, the included angle of the upper cross beam or the lower cross beam relative to the horizontal plane is defined in this application, during the later driving process, the application direction of the force exerted by the vehicle frame on the battery assembly can have a relatively small included angle with the inclination direction of the battery assembly, so that the lower cross beam can provide sufficient and stable upward support for the battery assembly, and the upper cross beam can provide sufficient and stable downward limiting for the battery assembly, thereby making the battery assembly of the electric motorcycle not easily malfunction due to connection stability problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. shows a schematic structural diagram of an electric motorcycle in an embodiment of the present application.

[0017] Figure 2 FIG. shows a schematic structural diagram of a vehicle frame in an embodiment of the present application.

[0018] Figure 3 FIG. shows a schematic structural diagram of a lower guard plate in an embodiment of the present application.

[0019] Figure 4 FIG. shows a schematic diagram of a first reference line and a second reference line of an electric motorcycle in an embodiment of the present application.

[0020] Figure 5 FIG. shows a schematic structural diagram of the separation of the vehicle frame and the seat cushion in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0022] When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] It can be understood that the term "vertical" is used to describe the ideal state between two components. In the actual production or use state, there may be a state approximately vertical or equal between the two components. For example, in combination with numerical descriptions, vertical can refer to the included angle range between two straight lines being between 90° ± 10°, vertical can also refer to the dihedral angle range between two planes being between 90° ± 10°, and vertical can also refer to the included angle range between a straight line and a plane being between 90° ± 10°. The two components described as "vertical" may not be absolute straight lines or planes, and can also be approximately straight lines or planes. From a macroscopic perspective, as long as the overall extension direction is a straight line or a plane, the components can be considered "straight lines" or "planes".

[0025] The term "parallel" is used to describe the ideal state between two components. In the actual production or use state, there may be a state approximately parallel between the two components. For example, in combination with numerical descriptions, parallel can refer to the included angle range between two straight lines being between 180° ± 10°, parallel can also refer to the dihedral angle range between two planes being between 180° ± 10°, and parallel can also refer to the included angle range between a straight line and a plane being between 180° ± 10°. The two components described as "parallel" may not be absolute straight lines or planes, and can also be approximately straight lines or planes. From a macroscopic perspective, as long as the overall extension direction is a straight line or a plane, the components can be considered "straight lines" or "planes".

[0026] Unless otherwise defined, the term "plurality" in this article, when used to describe the quantity of components, specifically refers to two or more of such components.

[0027] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] Please refer to together Figure 1 and Figure 2, the electric motorcycle 100 includes a frame 11, a body cover 12, a motor assembly 200, a battery assembly 13, an electronic control assembly 14, a running system 15, a front suspension assembly 16 and a rear suspension assembly 17. Among them, the frame 11 constitutes the basic framework of the electric motorcycle 100, and the frame 11 is used to carry other components of the electric motorcycle 100. The body cover 12 is at least partially disposed on the frame 11, and the body cover 12 is used to protect the internal parts of the electric motorcycle 100. The battery assembly 13 is used to supply power to the motor assembly 200. The electronic control assembly 14 is electrically connected to the motor assembly 200 and mainly controls the motor assembly 200. The electronic control assembly 14 may include a motor controller 141. The running system 15 is in transmission connection with the motor assembly 200, can obtain driving force from the motor assembly 200, and drives the electric motorcycle 100 to run. The running system 15 includes a front running wheel 151 disposed at a forward position of the electric motorcycle 100 and a rear running wheel 152 disposed at a rearward position of the electric motorcycle 100. At least a part of the front running wheel 151 and at least a part of the rear running wheel 152 are located below the frame 11, and the front running wheel 151 and the rear running wheel 152 are respectively rotatably connected to the front and rear ends of the frame 11. The front suspension assembly 16 is used to connect the front running wheel 151 to the frame 11, and the rear suspension assembly 17 is used to connect the rear running wheel 152 to the frame 11.

[0029] For the convenience of description, this application defines the front, rear, left, right, up, and down directions as shown in Figure 3 . Among them, the front-rear direction refers to the length direction of the frame 11 of the electric motorcycle 100, the left-right direction refers to the width direction of the frame 11 of the electric motorcycle 100, and the up-down direction refers to the height direction of the frame 11 of the electric motorcycle 100. Among them, the front, rear, left, right, up, and down in this embodiment are all referenced in the state where the electric motorcycle 100 is running on a horizontal road surface, rather than in the state of running on an inclined road surface.

[0030] Please refer to Figure 2 , in one implementation, the frame 11 includes an upper cross beam 111 and a lower cross beam 112. The upper cross beam 111 and the lower cross beam 112 may both be composed of support tubes distributed on the left and right sides of the electric motorcycle 100. A cross tube is also disposed between the left and right support tubes to achieve the fixed connection between the left and right support tubes. When observing the frame 11 in the left-right direction, a receiving space 101 is formed between the upper cross beam 111 and the lower cross beam 112. The battery assembly 13 is installed in the receiving space 101. The battery assembly 13 includes an upper end surface 131 and a lower end surface 132. The upper end surface 131 is connected to the upper cross beam 111, and the lower end surface 132 is connected to the lower cross beam 112.

[0031] The upper end surface 131 is substantially parallel to the extension direction of the upper cross beam 111, so as to increase the connection area between the upper end surface 131 and the upper cross beam 111, which is beneficial to improve the stability of the connection between the battery assembly 13 and the frame 11. A horizontal plane S1 perpendicular to the up-down direction is defined, and the angle α1 between the extension direction of the upper cross beam 111 and the horizontal plane S1 ranges from 10° to 68°, so that the battery assembly 13 connected to the upper cross beam 111 is inclined relative to the horizontal plane S1.

[0032] The lower end surface 132 is substantially parallel to the extension direction of the lower cross beam 112, so as to increase the connection area between the lower end surface 132 and the lower cross beam 112, which is beneficial to improve the stability of the connection between the battery assembly 13 and the frame 11. The angle α2 between the extension direction of the lower cross beam 112 and the horizontal plane S1 ranges from 10° to 68°, so that the battery assembly 13 connected to the lower cross beam 112 is inclined relative to the horizontal plane S1.

[0033] In one implementation, the difference between α1 and α2 ranges from 0° to 6°, and the difference can be 0°, 1°, 2°, 3°, 4°, 5° or 6°. In this way, the upper crossbeam 111, the upper end surface 131, the lower crossbeam 112 and the lower end surface 132 are substantially parallel, so that the upper and lower ends of the battery assembly 13 are evenly stressed, thereby improving the stability of the connection between the battery assembly 13 and the frame 11.

[0034] It is worth noting that when α1 and α2 are too small, for example, less than 10°, the battery assembly 13 is likely to be basically arranged vertically, that is, the space occupied in the up and down directions is large, which causes the part of the frame 11 located above the battery assembly 13 to be too high, affecting the driving experience, or the part of the frame 11 located below the battery assembly 13 is too low, and the ground clearance is too small, affecting the passability of the electric motorcycle 100. When α1 and α2 are too large, for example, greater than 68°, the end face of the battery assembly 13 with the power connection terminal is basically facing the front end or the rear end of the accommodation space 101, which has two problems. First, if the angle is too large, the height of the power connection terminal will be too low and it is easy to be damaged by wading. If the height of the entire battery assembly 13 is increased to avoid the wading problem, it will lead to the need to improve the structure of the part of the frame 11 located above the accommodation space 101, causing the structure of this part of the frame 11 to be too high, affecting the driving experience. Secondly, during the running of the electric motorcycle 100, the liquid material in the battery assembly 13 (e.g., electrolyte, organic solvent, etc. in the liquid lithium battery) tends to flow along the height direction of the battery assembly 13 and squeeze the diaphragm, which may cause a safety accident of the battery assembly 13. By limiting the range of α1 to 10° to 68° and the range of α2 to 10° to 68°, the following problems can be balanced: the small ground clearance between the frame 11 and the battery assembly 13 affects the passability and wading performance, the height of the top of the frame 11 is too high, which affects the driving experience, and the liquid lithium battery is placed horizontally, which poses certain safety hazards.

[0035] Optionally, α1 can be any one of 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68° or a range composed of any two of them.

[0036] Furthermore, when the range of α1 is from 18° to 60°, the above-mentioned multiple problems can be further balanced, so that the electric motorcycle 100 has better safety, passability, wading ability and driving experience.

[0037] Furthermore, when the range of α1 is from 22° to 50°, the above-mentioned multiple problems can be further balanced, so that the electric motorcycle 100 has better safety, passability, wading ability and driving experience.

[0038] Furthermore, when the range of α1 is from 25° to 40°, the above-mentioned multiple problems can be further balanced, so that the electric motorcycle 100 has better safety, passability, wading ability and driving experience.

[0039] Furthermore, when the range of α1 is from 27° to 30°, the above-mentioned multiple problems can be further balanced, so that the electric motorcycle 100 has better safety, passability, wading ability and driving experience.

[0040] Optionally, α2 can be any one of 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68° or a range composed of any two of them.

[0041] Further, the range of α2 is from 18° to 60°, which can further balance the above-mentioned multiple problems, so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0042] Further, the range of α2 is from 22° to 50°, which can further balance the above-mentioned multiple problems, so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0043] Further, the range of α2 is from 25° to 40°, which can further balance the above-mentioned multiple problems, so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0044] Further, the range of α2 is from 27° to 30°, which can further balance the above-mentioned multiple problems, so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0045] In one implementation, the lower end surface 132 fits with the lower cross beam 112 to increase the supporting area of the lower cross beam 112 for the battery assembly 13, thereby improving the stability of the connection between the battery assembly 13 and the vehicle frame 11. In another implementation, the lower end surface 132 and the lower cross beam 112 are supported by a plurality of support points, and a certain gap may be optionally reserved between the lower end surface 132 and the lower cross beam 112, and this gap can be used for convenient maintenance.

[0046] In one implementation, in a plane perpendicular to the width direction of the vehicle frame 11, there is a gap between the projection of the upper end surface 131 and the projection of the upper cross beam 111, and the width range of this gap is from 30 mm to 60 mm. In a specific implementation, the above gap can be used to accommodate the wire harness for connecting the electronic control assembly 14 and the motor assembly 200. In another specific implementation, the above gap can also accommodate other components, and the wire harness can be connected to the side wall of the battery assembly 13 near this gap. Optionally, the distance between the upper end surface 131 and the upper cross beam 111 can be any one of 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm or any range composed of any two of them.

[0047] Please refer to Figure 2 and Figure 3, the front suspension assembly 16 includes two front shock absorbers 161 distributed on the left and right sides of the front traveling wheels 151. The included angle range between the telescopic direction of the front shock absorbers 161 and the direction perpendicular to the upper end face 131 or the lower end face 132 is from 0° to 30°, so that the telescopic direction of the front shock absorbers 161 is substantially parallel to the inclination direction of the battery assembly 13, facilitating the front suspension assembly 16 to buffer the force exerted by the battery assembly 13 on the vehicle frame 11 and improving the stability of the connection between the battery assembly 13 and the vehicle frame 11. Among them, the inclination direction of the battery assembly 13 also refers to the center line direction of the battery assembly 13, and this center line is substantially parallel to the long side of the battery assembly 13.

[0048] Optionally, the included angle between the telescopic direction of the front shock absorbers 161 and the direction perpendicular to the upper end face 131 or the lower end face 132 can be any one of 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30° or the range composed of any two of them.

[0049] Furthermore, the included angle between the telescopic direction of the front shock absorbers 161 and the direction perpendicular to the upper end face 131 or the lower end face 132 can be from 0° to 10°, which can further improve the stability of the connection between the battery assembly 13 and the vehicle frame 11.

[0050] The lower end face 132 includes a front lower side 1321 and a rear lower side 1322, and the front lower side 1321 is higher than the rear lower side 1322.

[0051] The vehicle frame 11 further includes a lower connection section 114. The lower connection section 114 can optionally be composed of support pipes distributed on the left and right sides of the electric motorcycle 100. A cross pipe is also provided between the left and right support pipes to achieve the fixed connection between the left and right support pipes. The lower connection section 114 is connected between the lower cross beam 112 and the front suspension assembly 16. One end of the lower connection section 114 far from the lower cross beam 112 is bent forward and upward relative to the lower cross beam 112. A lower junction part 1141 is provided at the connection between the lower connection section 114 and the lower cross beam 112. One corner of the battery assembly 13 is connected to the lower junction part 1141, and this corner refers to the front lower side 1321 of the lower end face 132, that is, the front lower side 1321 of the lower end face 132 is located at the lower junction part 1141. With such a setting, the layout rationality of the battery assembly 13 in the accommodation space 101 can be improved, and thus it is convenient to save space to arrange other components in the accommodation space 101.

[0052] The frame 11 further includes an upper connecting section 115. The upper connecting section 115 may be composed of support pipes distributed on the left and right sides of the electric motorcycle 100. A cross pipe is also provided between the support pipes on the left and right sides to achieve fixed connection between the left and right support pipes. The upper connecting section 115 is connected between the upper cross beam 111 and the front suspension assembly 16. One end of the upper connecting section 115 away from the upper cross beam 111 is bent forward and downward relative to the upper cross beam 111. An upper junction portion 1151 is provided at the connection between the upper connecting section 115 and the upper cross beam 111. One corner of the battery assembly 13 is located at the upper junction portion 1151. The upper end face 131 includes a front upper side edge 1311 and a rear upper side edge 1312. This corner refers to the front upper side edge 1311 of the upper end face 131. That is, the front upper side edge 1311 of the upper end face 131 is located at the upper junction portion 1151. With such an arrangement, the rationality of the layout of the battery assembly 13 in the accommodation space 101 can be improved, and further it is convenient to save space to arrange other components in the accommodation space 101.

[0053] The frame 11 further includes a rear connecting section 117. The rear connecting section 117 may be composed of support pipes distributed on the left and right sides of the electric motorcycle 100. A cross pipe is also provided between the support pipes on the left and right sides to achieve fixed connection between the left and right support pipes. The rear connecting section 117 is connected to the rear end of the upper cross beam 111 and is located above the rear traveling wheel 152.

[0054] The frame 11 further includes a vertical connecting section 118. The vertical connecting section 118 is located behind the battery assembly 13 and is connected between the upper cross beam 111 and the lower cross beam 112. The vertical connecting section 118 may be composed of support pipes distributed on the left and right sides of the electric motorcycle 100. A cross pipe is also provided between the support pipes on the left and right sides to achieve fixed connection between the left and right support pipes.

[0055] The vertical connecting section 118 includes a first connecting sub-section 1181 and a second connecting sub-section 1182. The first connecting sub-section 1181 is connected between the rear end of the upper cross beam 111 and the rear end of the lower cross beam 112. The second connecting sub-section 1182 is connected between the upper part of the first connecting sub-section 1181 and the rear end of the rear connecting section 117. With such an arrangement, the strength of the frame 11 can be improved.

[0056] Viewed from left to right, there is a certain space on both the front and rear sides of the battery assembly 13, and this space can be used to accommodate components. Among them, for the front space of the battery assembly 13, a straight line perpendicular to the extension direction of the lower crossbeam 112 or the upper crossbeam 111 and perpendicular to the left-right direction of the vehicle frame 11 is defined as a preset straight line. Viewing the upper connecting section 115 and the lower connecting section 114 from left to right, the spacing between the upper connecting section 115 and the lower connecting section 114 along the extension direction of the preset straight line is gradually decreasing from the rear to the front. The front space is formed jointly by the upper connecting section 115, the lower connecting section 114, and the battery assembly 13, and the electronic control assembly 14 is installed in the front space. For the rear space of the battery assembly 13, both the upper crossbeam 111 and the lower crossbeam 112 are divided into two sections. The battery assembly 13 is located between the front section of the upper crossbeam 111 and the front section of the lower crossbeam 112, and the space between the rear section of the upper crossbeam 111 and the rear section of the lower crossbeam 112 is the rear space of the battery assembly 13, and the vertical connecting section 118 is used to define the rear boundary of this rear space. In one implementation, the front section of the upper crossbeam 111 and the rear section of the upper crossbeam 111 are integrally formed, and the extension directions of the above two sections are the same; the front section of the lower crossbeam 112 and the rear section of the lower crossbeam 112 are integrally formed, and the extension directions of the above two sections are the same.

[0057] The lowest point of the rear space of the battery assembly 13 is lower than the lowest point of the battery assembly 13, and the feet 31 can be installed at this lowest point. In another implementation (not shown in the figure), the extension directions of the front section of the upper crossbeam 111 and the rear section of the upper crossbeam 111 are not the same, and the rear section of the upper crossbeam 111 bends backward and downward; the extension directions of the front section of the lower crossbeam 112 and the rear section of the lower crossbeam 112 are also not the same, and the rear section of the lower crossbeam 112 bends backward and upward. The volume of the rear space of the battery assembly 13 is smaller, but the ground clearance of the entire vehicle frame 11 is larger, and the passability is better.

[0058] It should be noted that the lower connecting section 114 and the lower crossbeam 112 are an integrally formed structure, and a lower junction 1141 is formed. The lower junction 1141 is the bending place. The vehicle frames in related technologies also include an integrally formed beam structure located below the battery, and there is also a bending place on this beam structure. However, the bending place in related technologies is often set at the rear position of the vehicle frame, while the bending place in this application is set more forward. Therefore, the vehicle frame 11 of this application can provide sufficient space for the battery assembly 13, so that the battery assembly 13 can be tilted, and the ranges of the included angle α1 are from 10° to 68° and the included angle α2 are from 10° to 68°.

[0059] Please refer to Figure 4, in addition, the relatively forward position of the bending part has little impact on the vehicle's passing performance. When observing from left to right, the first reference line S2 is defined as the line that is tangent to the outer circle of the rear traveling wheel 152 and passes through the lowest point of the vehicle frame 11 (the point where the mounting feet of the vehicle frame 11 are located) when the vehicle is in a horizontal driving state. The second reference line S3 is defined as the line that is tangent to the outer circle of the rear traveling wheel 152 and passes through the lower junction part 1141. Among them, the most influential factor affecting the vehicle's passing performance is the height of the ground clearance, that is, the height of the lowest point. The first reference line S2 represents the slope passing limit related to the lowest point of the vehicle frame 11 and the rear traveling wheel 152 when the vehicle passes through an obstacle. This slope passing limit is also a factor affecting the vehicle's passing performance. During the process of the vehicle crossing an obstacle such as a step 90, it is possible that the front traveling wheel 151 has already straddled onto the step 90 while the rear traveling wheel 152 has not yet contacted the step 90. At this time, the vehicle can pass through the step 90 in at least the following two ways. The first is that the front traveling wheel 151 and the rear traveling wheel 152 always remain in contact with the ground and move forward. If crossing the step 90 in this way, the height of the step 90 should not be too high, otherwise it will hit the lowest point of the vehicle frame 11. The second is that the driver uses certain driving skills to lift the rear traveling wheel 152 off the ground and make the whole vehicle pivot around the front traveling wheel 151 to drive the rear traveling wheel 152 to laterally move onto the step 90. If crossing the step 90 in this way, it mainly depends on whether the lower junction part 1141 is below the first reference line S2. If the lower junction part 1141 is below the first reference line S2 and the distance from the first reference line S2 is relatively large, it is easy to cause a collision.

[0060] In one implementation (not shown in the figure), the lower junction part 1141 is located above the first reference line S2. Then, even if the lower junction part 1141 is moved forward to adapt to the inclined setting of the battery module 13, it does not affect the vehicle's passing performance. In another implementation, the lower junction part 1141 is located below the first reference line S2, and the range of the included angle α3 between the first reference line S2 and the second reference line S3 is from 0° to 10°. With such a setting, the lower junction part 1141 is more forward and lower than in the prior art. Although it has a certain impact on the vehicle's passing performance, the impact is not very large, and the passing performance can still be guaranteed.

[0061] Optionally, α3 can be any one of 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9° or any range composed of any two of them.

[0062] Furthermore, the range of α3 is from 0° to 5°, which can further reduce the impact of the relatively forward position of the bending part on the vehicle's passing performance.

[0063] Further, the front lower side 1321 of the battery assembly 13 is exactly located at the lower junction 1141, which means that on the premise of completing the above setting of the battery assembly 13, the position of the lower junction 1141 is set as far back as possible, thereby further improving the passability.

[0064] Viewed from top to bottom, the minimum distance in the front-rear direction between the orthographic projection of the center of the front traveling wheel 151 on the horizontal plane S1 and the orthographic projection of the lower junction 1141 on the horizontal plane S1 is L1, and the wheel axle distance between the front traveling wheel 151 and the rear traveling wheel 152 is L2. The range of L1 / L2 is 0.25 to 0.35, so that the lower junction 1141 is more forward than the prior art. Then, the battery assembly 13 can obtain a better layout structure, and at the same time, the impact on the passability of the whole vehicle is not significant. It should be noted that the wheelbase of the electric motorcycle 100 is the distance between the rotation center of the front traveling wheel 151 and the rotation center of the rear traveling wheel 152.

[0065] Optionally, L1 / L2 can be any one of 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35 or the range composed of any two of them.

[0066] Further, the range of L1 / L2 is 0.28 to 0.3, which can further make the lower junction 1141 more forward than the prior art. Then, the battery assembly 13 can obtain a better layout structure, and at the same time, the impact on the passability of the whole vehicle is not significant.

[0067] Please refer to Figure 5 , the body covering 12 includes a seat cushion 121, and the seat cushion 12 is arranged on the top of the frame 11 for the driver to sit. The frame 11 further includes a head tube 116. The ends of the lower connecting section 114 and the upper connecting section 115 are connected to the head tube 116, and the head tube 116 is connected to the front suspension assembly 16. Viewed from top to bottom, the support tubes on the left and right sides of the lower connecting section 114 gradually converge from back to front and are finally fixedly connected to the head tube 116. The support tubes on the left and right sides of the upper connecting section 115 gradually converge from back to front and are finally connected to the head tube 116. That is, from back to front, the widths of both the upper connecting section 115 and the lower connecting section 114 gradually decrease.

[0068] Please refer to Figure 2 , the electric control assembly 14, the battery assembly 13 and the motor assembly 200 are arranged in sequence from front to back along the extension direction of the upper cross beam 111 or the lower cross beam 112, so that the electric control assembly 14 and the motor assembly 200 are compactly arranged on the front and rear sides of the battery assembly 13. Specifically, the electric control assembly 14 is arranged in the front side space of the battery assembly 13, and the motor assembly 200 is installed in the rear side space of the battery assembly 13.

[0069] Viewed from the front to the back, the height of the lowermost end of the electronic control assembly 14, the height of the lowermost end of the battery assembly 13, and the height of the lowermost end of the motor assembly 200 decrease in sequence. That is, in the direction from the front to the back, the lower part of the battery assembly 13 is not blocked by the electronic control assembly 14, and the lower part of the motor assembly 200 is not blocked by the battery assembly 13. With such a setting, during the running of the electric motorcycle 100, a part of the electronic control assembly 14, the battery assembly 13, and the electronic control assembly 14 can directly face the wind for heat dissipation, so the thermal management effect of the whole vehicle is better.

[0070] Please refer to Figure 3 , the body covering 12 includes side guard plates 123. The side guard plates 123 are arranged on the left and right sides of the frame 11, and at least part of the side guard plates 123 covers the accommodation space 101 to protect the structures located in the accommodation space 101.

[0071] Side ventilation holes 123 are provided on the left and right sides of the side guard plates 123, and the left and right sides of the battery assembly 13 are respectively exposed from the side ventilation holes 1231 to facilitate the heat dissipation of the battery assembly 13.

[0072] The body covering 12 includes a lower guard plate 124. The lower guard plate 124 is arranged on the lower side of the frame 11 and is used to protect the structures located in the accommodation space 101. The lower guard plate 124 includes a front covering part 1241 and a rear covering part 1242. The front covering part 1241 is basically parallel to the extension direction of the lower connecting section 114 and is connected to the lower connecting section 114, and the rear covering part 1242 is basically parallel to the extension direction of the lower cross beam 112 and is connected to the lower cross beam 112. With such a setting, the structures located in the accommodation space 101 can be better protected.

[0073] The front covering part 1241 is provided with front ventilation holes 1241A. Viewed from the front to the back, the lower part of the electronic control assembly 14 is exposed from the front ventilation holes 1241A to facilitate a part of the electronic control assembly 14 to directly face the wind for heat dissipation through the front ventilation holes 1241A. The rear covering part 1242 is provided with rear ventilation holes 1242A. Viewed from the front to the back, the lower part of the battery assembly 13 and the lower part of the motor assembly 200 are exposed from the rear ventilation holes 1242A to facilitate a part of the battery assembly 13 and the motor assembly 200 to directly face the wind for heat dissipation through the rear ventilation holes 1242A.

[0074] In one implementation, the lower guard plate 124 is connected to the frame 11 by snap fasteners and / or bolts to facilitate the disassembly and assembly of the lower guard plate 124.

[0075] Please refer to Figure 2, the electric control component 14 further includes a heat dissipation plate 142 and a control wire harness 143 connected between the motor controller 141 and the motor assembly 200. The heat dissipation plate 142 is connected to the front side or the rear side of the motor controller 141. Heat dissipation fins are provided on the heat dissipation plate 142, and the heat dissipation plate 142 is used to dissipate heat from the motor controller 141. In one implementation, the heat dissipation plate 142 is connected to the rear side of the motor controller 141, that is, the heat dissipation plate 142 is located between the motor controller 141 and the battery assembly 13. Then, the front side of the heat dissipation plate 142 is blocked by the motor controller 141, and the heat dissipation effect is limited. However, since there is no blockage on the front side of the motor controller 141, there is enough space on its front side to accommodate the plug connector connected to the motor controller 141. In other words, with such a setting, the arrangement of the plug connector can be facilitated. In another implementation, the heat dissipation plate 142 is connected to the front side of the motor controller 141, that is, the heat dissipation plate 142 is located on the side of the motor controller 141 away from the battery assembly 13. Then, the front side of the heat dissipation plate 142 is the windward side and is not blocked by the motor controller 141, and the front-side airflow can be better utilized for heat dissipation.

[0076] In one implementation, in the front-side space of the battery assembly 13, not only the electric control component 14 is accommodated, but also at least one connector 32 is accommodated. The connector 32 can be a power lock connector. An installation plate 33 is provided on the side of the front-side space of the battery assembly 13. The installation plate 33 is fixed to the lower connection section 114, the upper connection section 115, and the head tube 116. The connector 32 is installed on the installation plate 33, and the installation plate 33 can not only serve as the installation base for components such as the connector 32, but also protect the front part of the front-side space of the battery assembly 13.

[0077] In one implementation, at least part of the control wire harness 143 passes through between the upper end face 131 of the battery assembly 13 and the upper cross beam 111. With such a setting, first, the layout height of the control wire harness 143 can be increased, the probability of the control wire harness 143 being damaged by debris on the road surface can be reduced, and the wading risk can be reduced. Second, the space between the motor controller 141 and the motor assembly 200 can protect the control wire harness 143 in the up-down direction. Third, there will be no wire harness blockage on the left and right sides of the battery assembly 13, which is convenient for the disassembly and assembly of the battery assembly 13. In another implementation, along the front-rear direction of the vehicle frame 11, the control wire harness 143 passes by one side of the battery assembly 13 and is arranged close to the upper end face 131. Specifically, at least part of the control wire harness 143 passes by the left side face of the battery assembly 13 and is close to the upper end face, and / or at least part of the control wire harness 143 passes by the right side face of the battery assembly 13 and is close to the upper end face 131. With such a setting, the layout height of the control wire harness 143 can also be increased, thereby reducing the probability of the control wire harness 143 being damaged by debris on the road surface and reducing the wading risk.

[0078] In one implementation, the motor assembly 200 is provided with a plurality of connection points. Some of the connection points are connected to a rear section of the lower cross beam 112. With this arrangement, the vehicle frame 11 can provide better support for the motor assembly 200. Some of the connection points are connected to the vertical connection section 118. With this arrangement, the vehicle frame 11 can provide better front-to-back direction limitation for the motor assembly 200.

[0079] It should be noted that, in other implementations, the motor assembly 200 can be selected as a model with the electric control assembly 14, that is, the motor assembly 200 and the electric control assembly 14 are assembled together and located behind the battery assembly 13. With this arrangement, the volume of the rear space of the battery assembly 13 needs to be set larger. In the implementation where the motor assembly 200 and the electric control assembly 14 are separately arranged, as long as the battery assembly 13 is inclined and the ranges of the included angles α1 and α2 are between 10° and 68°, a front space of the battery assembly 13 can be formed within the vehicle frame 11, and the electric control assembly 14 can be installed into the front space of the battery assembly 13. Thus, the volume of the rear space of the battery assembly 13 can be set smaller. In other words, if the space for accommodating the motor assembly 200 is larger, a motor assembly 200 with a larger power and a larger volume can be selected, increasing the performance of the whole vehicle. In a specific implementation, when the range of the wheel axle spacing between the front traveling wheel 151 and the rear traveling wheel 152 is 1000 mm to 1100 mm, the range of the motor power in the motor assembly 200 can be selected as 1 kW to 3 kW. With this arrangement, the electric motorcycle 100 can be suitable for the use environment of youth off-road. It should be noted that the wheelbase of the electric motorcycle 100 is the distance between the rotation centers of the front traveling wheel 151 and the rear traveling wheel 152.

[0080] In addition, relative to the vehicle frame 11, the installation position of the electric control assembly 14 is relatively forward, and the installation position of the battery assembly 13 is also relatively forward, so the center of gravity of the whole vehicle is forward, and the risk of the electric motorcycle 100 tipping up during driving is small.

[0081] Optionally, the wheel axle spacing between the front traveling wheel 151 and the rear traveling wheel 152 can be any one of 1000 mm, 1010 mm, 1020 mm, 1030 mm, 1040 mm, 1050 mm, 1060 mm, 1061 mm, 1062 mm, 1063 mm, 1064 mm, 1065 mm, 1066 mm, 1067 mm, 1068 mm, 1069 mm, 1070 mm, 1080 mm, 1090 mm, 1100 mm or a range composed of any two of them.

[0082] Optionally, the motor power in the motor assembly 200 can be any one of 1 kW, 1.1 kW, 1.2 kW, 1.3 kW, 1.4 kW, 1.5 kW, 1.6 kW, 1.7 kW, 1.8 kW, 1.9 kW, 2 kW, 2.1 kW, 2.2 kW, 2.3 kW, 2.4 kW, 2.5 kW, 2.6 kW, 2.7 kW, 2.8 kW, 2.9 kW, 3 kW or a range composed of any two of them.

[0083] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to limit the present application. As long as appropriate changes and variations are made to the above embodiments within the spirit of the present application, they fall within the scope disclosed by the present application.

Claims

1. An electric motorcycle, comprising: A frame; A body covering, at least part of which covers the frame; A battery assembly supported by the frame; A motor assembly supported by the frame and electrically connected to the battery assembly; A running system, which includes a front running wheel and a rear running wheel, both the front running wheel and the rear running wheel are at least partially located below the frame, and the rear running wheel is in transmission connection with the motor assembly; It is characterized in that the frame includes an upper cross beam and a lower cross beam, an accommodation space is formed between the upper cross beam and the lower cross beam, the battery assembly is installed in the accommodation space, the battery assembly includes an upper end face and a lower end face, the upper end face is connected to the upper cross beam and is substantially parallel to the extension direction of the upper cross beam, and the lower end face is connected to the lower cross beam and is substantially parallel to the extension direction of the lower cross beam; the included angle range between the extension direction of the upper cross beam and the horizontal plane is 10° to 68°, and / or the included angle range between the extension direction of the lower cross beam and the horizontal plane is 10° to 68°.

2. The electric motorcycle according to claim 1, characterized in that, The range of the difference between the included angle between the extension direction of the upper cross beam and the horizontal plane and the included angle between the extension direction of the lower cross beam and the horizontal plane is 0° to 6°; the included angle range between the extension direction of the upper cross beam and the horizontal plane is 27° to 30°, and / or the included angle range between the extension direction of the lower cross beam and the horizontal plane is 27° to 30°.

3. The electric motorcycle according to claim 1, characterized in that, The electric motorcycle further includes a front suspension assembly, the front running wheel is connected to the frame through the front suspension assembly, the front suspension assembly includes a front shock absorber, and the included angle range between the telescopic direction of the front shock absorber and the direction perpendicular to the upper end face or the lower end face is 0° to 10°.

4. The electric motorcycle according to claim 1, characterized in that, The lower end face includes a front lower side edge and a rear lower side edge, and the front lower side edge is higher than the rear lower side edge; the upper end face includes a front upper side edge and a rear upper side edge, and the front upper side edge is higher than the rear upper side edge.

5. The electric motorcycle according to claim 4, characterized in that, The frame further includes a lower connecting section, the lower connecting section is connected between the lower cross beam and the front suspension assembly, and the end of the lower connecting section far from the lower cross beam is bent forward and upward relative to the lower cross beam; a lower junction is provided at the connection between the lower connecting section and the lower cross beam, and the front lower side edge of the battery assembly is connected to the lower junction.

6. The electric motorcycle according to claim 5, wherein, When observing along the left-right direction of the frame, the line that is tangent to the outer circle of the rear running wheel and passes through the lowest point of the frame is defined as the first reference line, and the line that is tangent to the outer circle of the rear running wheel and passes through the lower junction is defined as the second reference line; the lower junction is located above the first reference line; or the lower junction is located below the first reference line, and the included angle range between the first reference line and the second reference line is 0° to 10°.

7. The electric motorcycle according to claim 5, characterized in that, The frame further includes an upper connecting section, the upper connecting section is connected between the upper cross beam and the front suspension assembly, and the end of the upper connecting section far from the upper cross beam is bent forward and downward relative to the upper cross beam; an upper junction is provided at the connection between the upper connecting section and the upper cross beam, and the front upper side edge of the battery assembly is located at the upper junction.

8. The electric motorcycle according to claim 7, wherein, The electric motorcycle further includes an electronic control assembly, which is electrically connected to the motor assembly. The electronic control assembly is installed in the accommodation space. The electronic control assembly, the battery assembly, and the motor assembly are arranged in sequence from front to back along the extension direction of the upper crossbeam or the lower crossbeam; a front-side space is jointly formed by the upper connection section, the lower connection section, and the battery assembly, and the electronic control assembly is installed in the front-side space.

9. The electric motorcycle according to claim 8, wherein When observed from front to back, the height of the lowermost end of the electronic control assembly, the height of the lowermost end of the battery assembly, and the height of the lowermost end of the motor assembly decrease in sequence.

10. The electric motorcycle according to claim 1, characterized in that, The wheel axle spacing of the front traveling wheel and the rear traveling wheel ranges from 1000 mm to 1100 mm, and the motor power in the motor assembly ranges from 1 kW to 3 kW; in a plane perpendicular to the left-right direction of the vehicle frame, there is a gap between the projection of the upper end surface and the projection of the upper crossbeam, and the width range of the gap is from 30 mm to 60 mm.

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