Electric motor cycle

Abstract

The application discloses an electric motorcycle, which comprises a frame, a body cover, a battery assembly, a motor assembly and a walking system. The body cover is at least partially covered on 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 walking system comprises front walking wheels and rear walking wheels, and the rear walking wheels are in transmission connection with the motor assembly. The frame comprises an upper cross beam and a lower cross beam, and 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 surface and a lower end surface, the upper end surface is connected to the upper cross beam and is substantially parallel to the extension direction of the upper cross beam, and the lower end surface is connected to the lower cross beam and is substantially parallel to the extension direction of the lower cross beam. The angle between the extension direction of the upper cross beam and the horizontal plane ranges from 10 DEG to 68 DEG, and / or the angle between the extension direction of the lower cross beam and the horizontal plane ranges from 10 DEG to 68 DEG. In this way, the connection stability of the battery assembly relative to the frame is high.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an electric motorcycle. Background Art

[0002] As energy shortages and other problems become increasingly serious, electricity is gradually replacing gasoline and diesel as a vehicle driving energy source due to its advantages such as energy saving and environmental protection. In this era, the use of electricity as a driving energy source has gradually extended from road electric motorcycles to electric motorcycles in various functional scenarios. Unlike road electric motorcycles, electric motorcycles in off-road conditions require frequent extreme acceleration, and energy consumption and exhaust pollution are more serious. In order to further achieve energy saving and environmental protection, it is particularly important to electrify electric motorcycles in off-road conditions.

[0003] As core components of electric motorcycles, the battery pack, the electronic control components (such as the motor controller) and the motor assembly are located in the electronic control system. Their layout and location can affect the off-road performance of electric motorcycles. Existing electric motorcycles have the following problems:

[0004] The connection stability of the battery assembly relative to the frame is not high enough, especially when the vehicle is off-road, which may easily cause battery assembly failure due to connection stability issues. Summary of the Invention

[0005] In view of this, it is necessary to provide an electric motorcycle whose battery assembly has a high connection stability relative to the frame and is less likely to malfunction during off-roading.

[0006] An embodiment of the present application provides an electric motorcycle comprising a frame, a body panel, a battery assembly, a motor assembly, and a travel system. The body panel 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 travel system comprises front and rear wheels, each of which is at least partially located below the frame, and the rear wheel is in transmission connection with the motor assembly. The frame comprises an upper crossbeam and a lower crossbeam, forming a storage space between the upper and lower crossbeams, and the battery assembly is mounted in the storage space. The battery assembly comprises an upper end face and a lower end face, the upper end face being connected to the upper crossbeam and substantially parallel to the extension direction of the upper crossbeam, and the lower end face being connected to the lower crossbeam and substantially parallel to the extension direction of the lower crossbeam; the extension direction of the upper crossbeam forms an angle ranging from 10° to 68° with the horizontal plane, and / or the extension direction of the lower crossbeam forms an angle ranging from 10° to 68° with the horizontal plane.

[0007] Furthermore, the difference between the angle between the extension direction of the upper beam and the horizontal plane and the angle between the extension direction of the lower beam and the horizontal plane ranges from 0° to 6°; the angle between the extension direction of the upper beam and the horizontal plane ranges from 27° to 30°, and / or the angle between the extension direction of the lower beam and the horizontal plane ranges from 27° to 30°.

[0008] Furthermore, the electric motorcycle also 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 angle between the extension and contraction direction of the front shock absorber and the direction perpendicular to the upper end face or the lower end face is in the range of 0° to 10°.

[0009] Furthermore, the lower end surface 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 surface includes a front upper side and a rear upper side, and the front upper side is higher than the rear upper side.

[0010] Furthermore, the frame also includes a lower connecting section, which is connected between the lower cross beam and the front suspension assembly, and 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 boundary portion is provided at the connection between the lower connecting section and the lower cross beam, and the front lower side of the battery assembly is connected to the lower boundary portion.

[0011] Furthermore, when observing along the left and right directions of the frame, a 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 a first reference line, and a line that is tangent to the outer circle of the rear running wheel and passes through the lower junction is defined as a 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 angle between the first reference line and the second reference line is in the range of 0° to 10°.

[0012] Furthermore, the frame also includes an upper connecting section, which is connected between the upper cross beam and the front suspension assembly, and 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 boundary portion 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 boundary portion.

[0013] Furthermore, the electric motorcycle also includes an electronic control component, which is electrically connected to the motor component and is installed in the accommodating space. The electronic control component, the battery component and the motor component are arranged in sequence from front to back along the extension direction of the upper beam or the lower beam; the front space is formed by the upper connecting section, the lower connecting section and the battery assembly, and the electronic control component is installed in the front space.

[0014] Furthermore, when viewed from the front to the back, the height of the lowest end of the electronic control assembly, the height of the lowest end of the battery assembly, and the height of the lowest end of the motor assembly decrease in sequence.

[0015] Furthermore, the axle spacing between the front and rear running wheels ranges from 1000mm to 1100mm, and the motor power in the motor assembly ranges from 1kW to 3kW; in a plane perpendicular to the left and right directions of the frame, there is a gap between the projection of the upper end face and the projection of the upper crossbeam, and the width of the gap ranges from 30mm to 60mm.

[0016] In the present application, since the lower end face of the battery assembly is substantially parallel to the extension direction of the lower crossbeam, and the upper end face is substantially parallel to the extension direction of the upper crossbeam, the upper and lower crossbeams can provide stable force limiting and support for the battery assembly. Furthermore, since the battery assembly is maintained within a reasonable tilt range, that is, the present application defines the angle of the upper or lower crossbeam relative to the horizontal plane, then during the later driving process, the direction of the force applied by the frame to the battery assembly can have a smaller angle with the tilt direction of the battery assembly, so that the lower crossbeam can provide sufficiently stable upward support for the battery assembly, and the upper crossbeam can provide sufficiently stable downward limiting for the battery assembly, thereby making the battery assembly of the electric motorcycle less prone to failure due to connection stability issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of an electric motorcycle in an embodiment of the present application is shown.

[0018] Figure 2 A schematic structural diagram of a vehicle frame in an embodiment of the present application is shown.

[0019] Figure 3 A schematic structural diagram of the lower guard plate in an embodiment of the present application is shown.

[0020] Figure 4 A schematic diagram showing a first reference line and a second reference line of an electric motorcycle in an embodiment of the present application is shown.

[0021] Figure 5 A schematic structural diagram showing the separation of the frame and the seat cushion in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0023] When a component is referred to as being “disposed on” another component, it can be directly disposed on the other component or there may be a component intervening therebetween. When a component is referred to as being “connected to” another component, it can be directly connected to the other component or there may be a component intervening therebetween.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] It can be understood that the term "perpendicular" is used to describe the ideal state between two components. In actual production or use, there may be a state between the two components that is approximately perpendicular or equal. For example, combined with numerical descriptions, perpendicular can refer to the angle between two straight lines being in the range of 90°±10°, perpendicular can also refer to the dihedral angle between two planes being in the range of 90°±10°, and perpendicular can also refer to the angle between a straight line and a plane being in the range of 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0026] The term "parallel" is used to describe the ideal state between two components. In actual production or use, there may be a state of approximate parallelism between the two components. For example, combined with numerical descriptions, parallel can refer to the angle between two straight lines being in the range of 180°±10°, parallel can also refer to the dihedral angle between two planes being in the range of 180°±10°, and parallel can also refer to the angle between a straight line and a plane being in the range of 180°±10°. The two components described as "parallel" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if its overall extension direction is a straight line or a plane.

[0027] Unless otherwise defined, the term "plurality" herein, when used to describe the number of components, specifically means that the components are two or more.

[0028] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other.

[0029] Please also refer to Figure 1 and Figure 2The 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 arranged 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, and 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, and can obtain driving force from the motor assembly 200 to drive the electric motorcycle 100 to move. The running system 15 includes a front running wheel 151 disposed at the front of the electric motorcycle 100 and a rear running wheel 152 disposed at the rear of the electric motorcycle 100. At least a portion of the front running wheel 151 and at least a portion 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.

[0030] For the convenience of expression, this application defines Figure 3 The front, rear, left, right, up, and down directions shown in the figure, wherein the front-to-back direction refers to the length direction of the frame 11 of the electric motorcycle 100, the left-to-right direction refers to the width direction of the frame 11 of the electric motorcycle 100, and the up-to-down direction refers to the height direction of the frame 11 of the electric motorcycle 100. In this embodiment, the front, rear, left, right, up, and down are all referenced to the state of the electric motorcycle 100 traveling on a horizontal road, rather than the state of traveling on an inclined road.

[0031] See also Figure 2 In one implementation, the frame 11 includes an upper crossbeam 111 and a lower crossbeam 112. The upper crossbeam 111 and the lower crossbeam 112 can each be optionally composed of bracket tubes distributed on the left and right sides of the electric motorcycle 100. A cross tube is also provided between the left and right bracket tubes to achieve a fixed connection between the left and right bracket tubes. Observing the frame 11 in the left-right direction, a storage space 101 is formed between the upper crossbeam 111 and the lower crossbeam 112. The battery assembly 13 is installed in the storage 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 crossbeam 111, and the lower end surface 132 is connected to the lower crossbeam 112.

[0032] The upper end surface 131 is substantially parallel to the extension direction of the upper crossbeam 111, thereby increasing the connection area between the upper end surface 131 and the upper crossbeam 111 and improving the stability of the connection between the battery assembly 13 and the vehicle frame 11. A horizontal plane S1 perpendicular to the vertical direction is defined, and the angle α1 between the extension direction of the upper crossbeam 111 and the horizontal plane S1 ranges from 10° to 68°, so that the battery assembly 13 connected to the upper crossbeam 111 is arranged at an angle relative to the horizontal plane S1.

[0033] Lower end surface 132 is substantially parallel to the extension direction of lower cross member 112, thereby increasing the connection area between lower end surface 132 and lower cross member 112 and improving the stability of the connection between battery assembly 13 and vehicle frame 11. An angle α2 formed between the extension direction of lower cross member 112 and horizontal plane S1 ranges from 10° to 68°, allowing battery assembly 13 connected to lower cross member 112 to be tilted relative to horizontal plane S1.

[0034] 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°. This arrangement makes the upper crossbeam 111, the upper end surface 131, the lower crossbeam 112, and the lower end surface 132 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.

[0035] It is worth noting that when α1 and α2 are too small, for example, less than 10°, the battery assembly 13 can be positioned essentially vertically, occupying a large amount of space in the vertical direction. This can cause the portion of the frame 11 above the battery assembly 13 to be too high, affecting the driving experience, or the portion of the frame 11 below the battery assembly 13 to be too low, resulting in insufficient ground clearance and 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 generally faces the front or rear end of the accommodating space 101, which presents two problems. First, excessively large angles can cause the power connection to be too low, making it susceptible to water damage. If the entire battery assembly 13 is raised to avoid water damage, the structure of the frame 11 above the accommodating space 101 must be modified, causing this portion of the frame 11 to be too high, affecting the driving experience. Secondly, while the electric motorcycle 100 is moving, liquid materials in the battery assembly 13 (e.g., electrolyte and organic solvent in the liquid lithium battery) can easily flow along the height of the battery assembly 13, squeezing the separator and potentially causing a safety hazard. By limiting the angle α1 to a range of 10° to 68° and the angle α2 to a range of 10° to 68°, the following issues can be addressed: limited ground clearance between the frame 11 and the battery assembly 13, which affects passability and water wading performance; the relatively high height of the frame 11, which affects the driving experience; and the horizontal placement of the liquid lithium battery, which poses certain safety risks.

[0036] Alternatively, α1 can be 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°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, 80°, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93° The range of any one of 0°, 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°, and 68°, or any two of them.

[0037] Furthermore, the range of α1 is 18° to 60°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0038] Furthermore, the range of α1 is 22° to 50°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0039] Furthermore, the range of α1 is 25° to 40°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0040] Furthermore, the range of α1 is 27° to 30°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0041] Alternatively, α2 may be 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°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, 80°, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93° The range of any one of 0°, 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°, and 68°, or any two of them.

[0042] Furthermore, the range of α2 is 18° to 60°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0043] Furthermore, the range of α2 is 22° to 50°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0044] Furthermore, the range of α2 is 25° to 40°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0045] Furthermore, the range of α2 is 27° to 30°, which can further balance the above-mentioned issues so that the electric motorcycle 100 has better safety, passability, wading performance and driving experience.

[0046] In one implementation, the lower end surface 132 is aligned with the lower crossbeam 112 to increase the support area of ​​the lower crossbeam 112 for the battery assembly 13, thereby improving the stability of the connection between the battery assembly 13 and the frame 11. In another implementation, the lower end surface 132 and the lower crossbeam 112 are supported by multiple support points, and a certain gap can be optionally retained between the lower end surface 132 and the lower crossbeam 112 to facilitate maintenance.

[0047] In one embodiment, in a plane perpendicular to the width direction of the frame 11, there is a gap between the projection of the upper end surface 131 and the projection of the upper crossbeam 111, and the width of the gap ranges from 30 mm to 60 mm. In a specific embodiment, the above-mentioned gap can be used to accommodate a wiring harness for connecting the electronic control component 14 and the motor component 200. In another specific embodiment, the above-mentioned gap can also accommodate other components, and the wiring harness can be connected to the side wall of the battery assembly 13 near the gap. Optionally, the spacing of the gap between the upper end surface 131 and the upper crossbeam 111 can be any one of 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, or a range consisting of any two of them.

[0048] Please also refer to Figure 2 and Figure 3The front suspension assembly 16 includes two front shock absorbers 161 distributed on the left and right sides of the front running wheel 151. The angle between the extension and contraction direction of the front shock absorber 161 and the direction perpendicular to the upper end surface 131 or the lower end surface 132 ranges from 0° to 30°, so that the extension and contraction direction of the front shock absorber 161 is basically parallel to the tilt direction of the battery assembly 13, which facilitates the front suspension assembly 16 to buffer the force applied by the battery assembly 13 to the frame 11 and improve the stability of the connection between the battery assembly 13 and the frame 11. The tilt direction of the battery assembly 13 also refers to the centerline direction of the battery assembly 13, which is basically parallel to the long side of the battery assembly 13.

[0049] Optionally, the angle between the telescopic direction of the front shock absorber 161 and the direction perpendicular to the upper end surface 131 or the lower end surface 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 a range consisting of any two of them.

[0050] Furthermore, the angle between the extension and contraction direction of the front shock absorber 161 and the direction perpendicular to the upper end surface 131 or the lower end surface 132 can be 0° to 10°, which can further improve the stability of the connection between the battery assembly 13 and the frame 11.

[0051] The lower end surface 132 includes a front lower side 1321 and a rear lower side 1322 . The front lower side 1321 is higher than the rear lower side 1322 .

[0052] The frame 11 also includes a lower connecting section 114, which can optionally be composed of support tubes distributed on the left and right sides of the electric motorcycle 100. A cross tube is also provided between the left and right support tubes to achieve a fixed connection between the left and right support tubes. The lower connecting section 114 is connected between the lower crossbeam 112 and the front suspension assembly 16. The end of the lower connecting section 114, away from the lower crossbeam 112, is bent forward and upward relative to the lower crossbeam 112. The connection between the lower connecting section 114 and the lower crossbeam 112 is defined by a lower interface 1141. One corner of the battery assembly 13 is connected to the lower interface 1141. This corner refers to the front lower side 1321 of the lower end surface 132. That is, the front lower side 1321 of the lower end surface 132 is located at the lower interface 1141. This arrangement can improve the rationality of the arrangement of the battery assembly 13 in the storage space 101, thereby saving space to accommodate other components in the storage space 101.

[0053] The frame 11 also includes an upper connecting section 115, which can be optionally composed of bracket tubes distributed on the left and right sides of the electric motorcycle 100. A cross tube is also provided between the left and right bracket tubes to achieve a fixed connection between the left and right bracket tubes. The upper connecting section 115 is connected between the upper crossbeam 111 and the front suspension assembly 16. The end of the upper connecting section 115 away from the upper crossbeam 111 is bent forward and downward relative to the upper crossbeam 111. The connection between the upper connecting section 115 and the upper crossbeam 111 is provided with an upper junction 1151. One of the corners of the battery assembly 13 is located at the upper junction 1151. The upper end surface 131 includes a front upper side 1311 and a rear upper side 1312. The corner refers to the front upper side 1311 of the upper end surface 131, that is, the front upper side 1311 of the upper end surface 131 is located at the upper junction 1151. Such an arrangement can improve the rationality of the arrangement of the battery assembly 13 in the accommodating space 101 , thereby saving space for arranging other components in the accommodating space 101 .

[0054] The frame 11 also includes a rear connecting section 117, which can be composed of support tubes distributed on the left and right sides of the electric motorcycle 100. A cross tube is also provided between the left and right support tubes to achieve a fixed connection between the left and right support tubes. The rear connecting section 117 is connected to the rear end of the upper crossbeam 111 and is located above the rear running wheel 152.

[0055] The frame 11 also includes a vertical connecting section 118, which is located behind the battery assembly 13 and connected between the upper crossbeam 111 and the lower crossbeam 112. The vertical connecting section 118 can optionally be composed of bracket tubes distributed on the left and right sides of the electric motorcycle 100. A cross tube is also provided between the left and right bracket tubes to achieve a fixed connection between the left and right bracket tubes.

[0056] The vertical connecting section 118 includes a first connecting section 1181 and a second connecting section 1182. The first connecting section 1181 is connected between the rear end of the upper cross member 111 and the rear end of the lower cross member 112, while the second connecting section 1182 is connected between the upper portion of the first connecting section 1181 and the rear end of the rear connecting section 117. This arrangement can improve the strength of the vehicle frame 11.

[0057] Viewed from left to right, the battery assembly 13 has a certain amount of space on both the front and rear sides, which can be used to accommodate components. Regarding the front space of the battery assembly 13, a 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 predetermined line. Viewed from left to right, the upper connecting section 115 and the lower connecting section 114 have a spacing along the predetermined line that gradually decreases from rear to front. The upper connecting section 115, the lower connecting section 114, and the battery assembly 13 collectively form a front space, in which the electronic control assembly 14 is mounted. Regarding the rear space of the battery assembly 13, the upper crossbeam 111 and the lower crossbeam 112 are each 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. 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 the 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 two sections extend in the same direction; the front section of the lower crossbeam 112 and the rear section of the lower crossbeam 112 are integrally formed, and the two sections extend in the same direction.

[0058] The lowest point of the space behind the battery assembly 13 is lower than the lowest point of the battery assembly 13 itself, and this lowest point can be used to mount the support leg 31. In another implementation (not shown), the front section of the upper crossbeam 111 and the rear section of the upper crossbeam 111 extend in different directions, with the rear section of the upper crossbeam 111 bending backward and downward. The front section of the lower crossbeam 112 and the rear section of the lower crossbeam 112 also extend in different directions, with the rear section of the lower crossbeam 112 bending backward and upward. This reduces the volume of the space behind the battery assembly 13, but increases the ground clearance of the entire frame 11, improving vehicle trafficability.

[0059] It is worth noting that the lower connecting section 114 and the lower crossbeam 112 are integrally formed and form a lower junction 1141, which is a bend. The frame of the related art also includes an integrally formed beam structure located below the battery, and the beam structure also has a bend. However, the bend in the related art is often located at the rear of the frame, while the bend in the present application is located more forward. Therefore, the frame 11 of the present application can provide sufficient space for the battery assembly 13 to facilitate the tilting of the battery assembly 13, and achieve an angle α1 range of 10° to 68° and an angle α2 range of 10° to 68°.

[0060] See also Figure 4Furthermore, the relatively forward placement of the bend has little impact on the vehicle's passability. Viewed from left to right, the first reference line S2 is defined as a line tangent to the outer circumference of the rear running wheel 152 and passing through the lowest point of the frame 11 (the point where the frame 11 supports are mounted) when the vehicle is in a horizontal driving state. The second reference line S3 is defined as a line tangent to the outer circumference of the rear running wheel 152 and passing through the lower junction 1141. Among them, the factor that most affects the vehicle's passability is the height of the ground clearance, that is, the height of the lowest point. The first reference line S2 represents the slope passability limit associated with the lowest point of the frame 11 and the rear running wheel 152 when the vehicle passes over an obstacle. This slope passability limit is also a factor affecting the vehicle's passability. When a vehicle crosses an obstacle such as a step 90, the front running wheel 151 may have already crossed the step 90, while the rear running wheel 152 has not yet touched the step 90. In this case, the vehicle has at least two ways to cross the step 90. The first is to keep both the front and rear running wheels 151 and 152 in contact with the ground. If the vehicle crosses the step 90 in this way, the height of the step 90 should not be too high, otherwise the vehicle will hit the lowest point of the frame 11. The second is that the driver uses certain driving skills to lift the rear running wheel 152 off the ground and use the front running wheel 151 as a fulcrum to drive the rear running wheel 152 sideways onto the step 90. If the vehicle crosses the step 90 in this way, the key factor to consider is whether the lower boundary 1141 is below the first reference line S2. If the lower boundary 1141 is below the first reference line S2 and the distance from the first reference line S2 is large, a collision is likely to occur.

[0061] In one implementation (not shown), the lower boundary 1141 is located above the first reference line S2. Even if the lower boundary 1141 is moved forward to accommodate the tilted arrangement of the battery assembly 13, the vehicle's passability is not affected. In another implementation, the lower boundary 1141 is located below the first reference line S2, and the angle α3 between the first reference line S2 and the second reference line S3 ranges from 0° to 10°. This arrangement places the lower boundary 1141 further forward and downward than in the prior art. Although this has a certain impact on the vehicle's passability, the impact is not significant, and passability can still be guaranteed.

[0062] Optionally, α3 may be any one of 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, or a range consisting of any two of them.

[0063] Furthermore, the range of α3 is 0° to 5°, which can further reduce the impact of the bend being set relatively forward on the vehicle's passability.

[0064] Furthermore, the front lower side 1321 of the battery assembly 13 is exactly located at the lower boundary 1141, which means that on the premise of completing the above-mentioned setting of the battery assembly 13, the position of the lower boundary 1141 is set as far back as possible, thereby further improving the passability.

[0065] When viewed from above, the minimum distance between the orthographic projection of the center of the front wheel 151 on the horizontal plane S1 and the orthographic projection of the lower boundary portion 1141 on the horizontal plane S1 along the front-to-back direction is L1. The axle spacing between the front wheel 151 and the rear wheel 152 is L2. The range of L1 / L2 is 0.25 to 0.35. This allows the lower boundary portion 1141 to be positioned further forward than in the prior art, thereby achieving a better arrangement of the battery assembly 13 while also minimizing the impact on the vehicle's overall passability. It should be noted that the wheelbase of the electric motorcycle 100 is the distance between the rotation center of the front wheel 151 and the rotation center of the rear wheel 152.

[0066] 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 a range consisting of any two of them.

[0067] Furthermore, the range of L1 / L2 is 0.28 to 0.3, which can further make the lower boundary 1141 further forward compared with the prior art, so that the battery assembly 13 can obtain a better arrangement structure, while having little impact on the passability of the entire vehicle.

[0068] See also Figure 5 The vehicle body covering 12 includes a seat cushion 121, which is arranged on the top of the frame 11 for the driver to sit on. The frame 11 also includes a head tube 116, and 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. When viewed from top to bottom, the bracket tubes on the left and right sides of the lower connecting section 114 gradually tighten and approach from back to front, and are finally fixedly connected to the head tube 116. The bracket tubes on the left and right sides of the upper connecting section 115 gradually tighten and approach from back to front, and are finally connected to the head tube 116. That is, from back to front, the width of the upper connecting section 115 and the width of the lower connecting section 114 gradually decrease.

[0069] See also Figure 2 The electronic control assembly 14, battery assembly 13, and motor assembly 200 are arranged in sequence from front to back along the extension direction of the upper crossbeam 111 or the lower crossbeam 112, so that the electronic control assembly 14 and the motor assembly 200 are compactly arranged on the front and rear sides of the battery assembly 13. Specifically, the electronic control assembly 14 is disposed in the space in front of the battery assembly 13, and the motor assembly 200 is installed in the space behind the battery assembly 13.

[0070] When viewed from front to back, the heights of the lowest ends of the electronic control assembly 14, the lowest ends of the battery assembly 13, and the lowest ends of the motor assembly 200 decrease in descending order. That is, from front to back, the lower portion of the battery assembly 13 is not blocked by the electronic control assembly 14, and the lower portion of the motor assembly 200 is not blocked by the battery assembly 13. This arrangement allows the electronic control assembly 14, the battery assembly 13, and the electronic control assembly 14 to all be partially exposed to the wind for heat dissipation during the movement of the electric motorcycle 100, resulting in better thermal management for the entire vehicle.

[0071] See also Figure 3 The vehicle body covering 12 includes side guard plates 123 , which are disposed on the left and right sides of the vehicle frame 11 . At least a portion of the side guard plates 123 covers the accommodating space 101 to protect the structure in the accommodating space 101 .

[0072] Side ventilation holes 1231 are provided on the left and right sides of the side guard plate 123 , and the left and right sides of the battery assembly 13 are respectively exposed from the side ventilation holes 1231 to facilitate heat dissipation of the battery assembly 13 .

[0073] The vehicle body panel 12 includes a lower guard plate 124, which is disposed on the underside of the vehicle frame 11. Lower guard plate 124 is used to protect the structure within the accommodating space 101. Lower guard plate 124 includes a front covering portion 1241 and a rear covering portion 1242. Front covering portion 1241 is substantially parallel to the extension direction of the lower connecting section 114 and connects to the lower connecting section 114. Rear covering portion 1242 is substantially parallel to the extension direction of the lower cross member 112 and connects to the lower cross member 112. This arrangement provides better protection for the structure within the accommodating space 101.

[0074] The front cover 1241 is provided with a front ventilation hole 1241A. When viewed from the front to the back, the lower portion of the electronic control assembly 14 is exposed through the front ventilation hole 1241A, so that a portion of the electronic control assembly 14 can be directly cooled by the wind through the front ventilation hole 1241A. The rear cover 1242 is provided with a rear ventilation hole 1242A. When viewed from the front to the back, the lower portion of the battery assembly 13 and the lower portion of the motor assembly 200 are exposed through the rear ventilation hole 1242A, so that a portion of the battery assembly 13 and the motor assembly 200 can be directly cooled by the wind through the rear ventilation hole 1242A.

[0075] In one implementation, the lower guard plate 124 is connected to the vehicle frame 11 via snaps and / or bolts to facilitate assembly and disassembly of the lower guard plate 124 .

[0076] See also Figure 2The electronic control assembly 14 also includes a heat sink 142 and a control harness 143 connected between the motor controller 141 and the motor assembly 200. The heat sink 142 is connected to the front or rear side of the motor controller 141. The heat sink 142 is provided with heat dissipation fins, and the heat sink 142 is used to dissipate heat for the motor controller 141. In one implementation, the heat sink 142 is connected to the rear side of the motor controller 141, that is, the heat sink 142 is located between the motor controller 141 and the battery assembly 13. The front side of the heat sink 142 is blocked by the motor controller 141, and the heat dissipation effect is limited. However, since the front side of the motor controller 141 is not blocked, there is enough space on its front side to accommodate the plug connector connected to the motor controller 141. In other words, such a setting can facilitate the arrangement of the plug connector. In another implementation, the heat sink 142 is connected to the front side of the motor controller 141, that is, the heat sink 142 is located on the side of the motor controller 141 away from the battery assembly 13. The front side of the heat sink 142 is the windward side and is not blocked by the motor controller 141. The airflow on the front side can be better utilized for heat dissipation.

[0077] In one implementation, the space in front of the battery assembly 13 accommodates not only the electronic control assembly 14 but also at least one connector 32, which can be a power lock connector. A mounting plate 33 is provided to the side of the space in front of the battery assembly 13. The mounting plate 33 is fixed to the lower connecting section 114, the upper connecting section 115, and the head tube 116. The connector 32 is mounted to the mounting plate 33. The mounting plate 33 not only serves as a mounting base for components such as the connector 32 but also protects the front portion of the space in front of the battery assembly 13.

[0078] In one embodiment, at least part of the control harness 143 passes between the upper end face 131 of the battery assembly 13 and the upper crossbeam 111. With this arrangement, first, the arrangement height of the control harness 143 can be increased, the probability of the control harness 143 being damaged by debris on the road surface can be reduced, and the risk of wading can be reduced. Secondly, the space between the motor controller 141 and the motor assembly 200 can protect the control harness 143 in the up and down directions. Thirdly, the left and right sides of the battery assembly 13 can be free of harness obstruction, making it easier to disassemble and assemble the battery assembly 13. In another embodiment, along the front-to-back direction of the frame 11, the control harness 143 passes from one side of the battery assembly 13 and is arranged close to the upper end face 131. Specifically, at least part of the control harness 143 passes from the left side of the battery assembly 13 and close to the upper end face, and / or at least part of the control harness 143 passes from the right side of the battery assembly 13 and close to the upper end face 131. Such a configuration can also increase the arrangement height of the control harness 143, thereby reducing the probability of the control harness 143 being damaged by debris on the road surface and reducing the risk of wading.

[0079] In one implementation, the motor assembly 200 is provided with a plurality of connection points, some of which are connected to a rear section of the lower cross beam 112. With such a configuration, the frame 11 can provide better support for the motor assembly 200; and some of the connection points are connected to the vertical connection section 118. With such a configuration, the frame 11 can provide better front and rear direction limitation for the motor assembly 200.

[0080] It is worth noting that in other implementations, the motor assembly 200 can be selected with an electronic control assembly 14, that is, the motor assembly 200 and the electronic control assembly 14 are assembled into one body and located behind the battery assembly 13. With such an arrangement, the volume of the rear space of the battery assembly 13 needs to be set larger. In the implementation in which the motor assembly 200 and the electronic control assembly 14 are arranged separately, as long as the battery assembly 13 is arranged at an angle and the angles α1 and α2 are in the range of 10° to 68°, a front space for the battery assembly 13 can be formed in the frame 11, and the electronic control assembly 14 can be installed in the front space of the battery assembly 13, so that the volume of the rear space of the battery assembly 13 can be set smaller. In other words, the space for accommodating the motor assembly 200 is larger, and a motor assembly 200 with higher power and larger volume can be selected to increase the performance of the entire vehicle. In one specific implementation, when the distance between the front and rear wheels 151, 152 is between 1000 mm and 1100 mm, the motor power of the motor assembly 200 can be selected to be between 1 kW and 3 kW. This configuration makes the electric motorcycle 100 suitable for use in off-road riding environments for teenagers. It should be noted that the wheelbase of the electric motorcycle 100 is the distance between the rotation centers of the front and rear wheels 151, 152.

[0081] In addition, relative to the frame 11, the installation position of the electronic control component 14 is relatively forward, and the installation position of the battery component 13 is also relatively forward, so the center of gravity of the entire vehicle is forward, and the risk of the electric motorcycle 100 not tilting is not likely to occur during driving.

[0082] Optionally, the axle spacing between the front running wheels 151 and the rear running wheels 152 can be any one of 1000mm, 1010mm, 1020mm, 1030mm, 1040mm, 1050mm, 1060mm, 1061mm, 1062mm, 1063mm, 1064mm, 1065mm, 1066mm, 1067mm, 1068mm, 1069mm, 1070mm, 1080mm, 1090mm, and 1100mm, or a range consisting of any two of them.

[0083] Optionally, the motor power in the motor assembly 200 can be any one of 1kW, 1.1kW, 1.2kW, 1.3kW, 1.4kW, 1.5kW, 1.6kW, 1.7kW, 1.8kW, 1.9kW, 2kW, 2.1kW, 2.2kW, 2.3kW, 2.4kW, 2.5kW, 2.6kW, 2.7kW, 2.8kW, 2.9kW, 3kW, or a range consisting of any two of them.

[0084] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments fall within the scope disclosed in the present application.

Claims

1. An electric motorcycle comprising: Frame; a body covering, the body covering at least partially covering the vehicle frame; a battery assembly, the battery assembly being supported by the vehicle frame; a motor assembly, the motor assembly being supported by the vehicle frame and electrically connected to the battery assembly; A traveling system, the traveling system comprising a front traveling wheel and a rear traveling wheel, the front traveling wheel and the rear traveling wheel being at least partially located below the vehicle frame, the rear traveling wheel being in driving connection with the motor assembly; The vehicle frame comprises an upper crossbeam and a lower crossbeam, wherein a receiving space is formed between the upper crossbeam and the lower crossbeam, the battery assembly and the motor assembly are installed in the receiving space, the battery assembly comprises an upper end surface and a lower end surface arranged along the long side direction of the battery assembly, the upper end surface is connected to the upper crossbeam and is substantially parallel to the extension direction of the upper crossbeam, and the lower end surface is connected to the lower crossbeam and is substantially parallel to the extension direction of the lower crossbeam; the angle between the extension direction of the upper crossbeam and the horizontal plane is in a range of 10° to 54°, and / or the angle between the extension direction of the lower crossbeam and the horizontal plane is in a range of 10° to 54°; The electric motorcycle further includes a front suspension assembly, the front running wheel is connected to the frame via the front suspension assembly, 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 a lower interface portion is provided at the connection between the lower connecting section and the lower cross beam; When viewed in the left-right direction of the frame, a line tangent to the outer circle of the rear running wheel and passing through the lowest point of the frame is defined as a first reference line, and a line tangent to the outer circle of the rear running wheel and passing through the lower intersection is defined as a second reference line; the lower intersection is located above the first reference line; or the lower intersection is located below the first reference line, and the angle between the first reference line and the second reference line ranges from 0° to 10°; Observing from top to bottom, the minimum distance between the orthographic projection of the center of the front running wheel on the horizontal plane and the orthographic projection of the lower boundary part on the horizontal plane in the front-to-back direction is L1, the axle spacing between the front running wheel and the rear running wheel is L2, and the range of L1 / L2 is 0.25 to 0.

35.

2. The electric motorcycle according to claim 1, wherein: The difference between the angle between the extension direction of the upper crossbeam and the horizontal plane and the angle between the extension direction of the lower crossbeam and the horizontal plane ranges from 0° to 6°; the angle between the extension direction of the upper crossbeam and the horizontal plane ranges from 27° to 30°, and / or the angle between the extension direction of the lower crossbeam and the horizontal plane ranges from 27° to 30°.

3. The electric motorcycle according to claim 1, wherein: The front suspension assembly includes a front shock absorber, and the angle between the extension and contraction direction of the front shock absorber and the direction perpendicular to the upper end surface or the lower end surface ranges from 0° to 10°.

4. The electric motorcycle according to claim 3, wherein: The lower end surface 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 surface includes a front upper side and a rear upper side, and the front upper side is higher than the rear upper side.

5. The electric motorcycle according to claim 4, wherein: One end of the lower connecting section away from the lower cross beam is bent forward and upward relative to the lower cross beam; the front lower side of the battery assembly is connected to the lower boundary portion.

6. The electric motorcycle according to claim 5, wherein: The frame also includes an upper connecting section, which is connected between the upper cross beam and the front suspension assembly, and one 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 boundary portion 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 boundary portion.

7. The electric motorcycle according to claim 6, wherein: The electric motorcycle also includes an electronic control component, which is electrically connected to the motor component and is installed in the accommodating space. The electronic control component, the battery component and the motor component are arranged in sequence from front to back along the extension direction of the upper crossbeam or the lower crossbeam; the upper connecting section, the lower connecting section and the battery component together form a front space, and the electronic control component is installed in the front space.

8. The electric motorcycle according to claim 7, wherein: When viewed from the front to the 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.

9. The electric motorcycle according to claim 1, wherein: The axle spacing between the front and rear running wheels ranges from 1000mm to 1100mm, and the motor power in the motor assembly ranges from 1kW to 3kW; in a plane perpendicular to the left and right directions of the frame, there is a gap between the projection of the upper end face and the projection of the upper crossbeam, and the width of the gap ranges from 30mm to 60mm.

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