All-terrain vehicle

Abstract

An all-terrain vehicle (100), comprising: a vehicle body covering (12); a suspension system (14); a traveling system (13); and an engine (151), wherein the engine is used for driving the traveling system; the engine comprises a left cylinder (1513a), a right cylinder (1513b), a left cylinder head (1514a) arranged on the left cylinder and a right cylinder head (1514b) arranged on the right cylinder, the left cylinder head being arranged at the rear of the left cylinder; the horizontal distance from the axis of the left cylinder to a longitudinal center plane is a first distance (W1), and the horizontal distance from the axis of the right cylinder to the longitudinal center plane is a second distance (W2); an upper main beam (1131) comprises an upper left main beam (1131a) and an upper right main beam (1131b), wherein a third distance (W3) and a fourth distance (W4) are defined between the upper left main beam and the upper right main beam, the fourth distance being greater than the third distance, the first distance or the second distance being less than half of the third distance, and the sum of the first distance and the second distance being less than the fourth distance. Such an arrangement enables the all-terrain vehicle to have a good heat dissipation effect and a good driving experience.

Description

All-terrain vehicles

[0001] Related applications

[0002] This application claims priority to the Chinese patent application filed on January 15, 2024, with application number 2024100573647 and invention name “All-terrain vehicle”; and the Chinese patent application filed on October 31, 2024, with application number 2024115474019 and invention name “All-terrain vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present invention relates to the technical field of vehicles, and in particular to an all-terrain vehicle. Background Art

[0004] An all-terrain vehicle (ATV) is a vehicle capable of traversing any terrain. It features a high chassis, a suspension with excellent shock absorption, tires with good grip, and high power. With the rapid development of vehicle technology, ATVs are becoming increasingly popular among consumers. ATVs, capable of navigating extremely harsh environments, including but not limited to beaches, mountains, forests, and swamps, have become widely used on farms and in recreational areas.

[0005] Due to the complex terrain environment, all-terrain vehicles require strong power output during the operation. This power demand directly leads to an increase in the number of cylinders in the all-terrain vehicle, increased output power, and increased heat generation. As a result, the temperature of the body parts close to the driver's body, especially the legs, will be higher, thus reducing the driving experience. Summary of the Invention

[0006] An all-terrain vehicle is provided in an embodiment of the present application to solve at least one problem existing in the background technology.

[0007] In order to solve the deficiencies of the existing technology, it is necessary to provide an all-terrain vehicle with good heat dissipation effect and good driving experience.

[0008] In the first aspect, an all-terrain vehicle is provided in this embodiment, which includes: a frame, a body covering, a suspension system, a traveling system and an engine, the frame includes an upper main beam, a lower main beam and a connecting bracket connected between the upper main beam and the lower main beam; the body covering is supported by the frame; the suspension system is supported by the frame; the traveling system is at least partially connected to the frame through the suspension system; the engine is used to drive the traveling system; the engine includes a left cylinder, a right cylinder, a left cylinder head arranged on the left cylinder and a right cylinder head arranged on the right cylinder; a plane perpendicular to the width direction of the frame and passing through the midpoint of the width of the frame is defined as a longitudinal center plane, and the longitudinal center plane passes through the midpoint of the distance between the left front wheel and the right front wheel; the central axis of the left cylinder is the left cylinder Axis, the center axis of the right cylinder is the right cylinder axis, the horizontal distance from the left cylinder axis to the longitudinal center plane is the first distance, the horizontal distance from the right cylinder axis to the longitudinal center plane is the second distance, the upper main beam includes a left upper main beam and a right upper main beam, the left upper main beam and the right upper main beam each extend along the length direction of the all-terrain vehicle, and a straddle width is defined between the left upper main beam and the right upper main beam, and the straddle width is defined as the third distance; at the longitudinal position closest to the left cylinder axis and the right cylinder axis, a top width is defined between the left upper main beam and the right upper main beam, and the top width is defined as having a fourth distance, the fourth distance is greater than the third distance, the first distance or the second distance is less than half of the third distance, and the sum of the first distance and the second distance is less than the fourth distance.

[0009] In the second aspect, the present embodiment provides an all-terrain vehicle, a frame, a body covering, a suspension system, a walking system and an engine, the frame including an upper main beam, a lower main beam and a connecting bracket connected between the upper main beam and the lower main beam; the body covering is supported by the frame; the suspension system is supported by the frame; the walking system is at least partially connected to the frame through the suspension system; the engine is used to drive the walking system; the engine includes a left cylinder, a right cylinder, a left cylinder head arranged on the left cylinder and a right cylinder head arranged on the right cylinder; a plane perpendicular to the width direction of the frame and passing through the midpoint of the width of the frame is defined as a longitudinal center plane, the longitudinal center plane passes through the midpoint of the distance between the left front wheel and the right front wheel; the central axis of the left cylinder is the left cylinder axis, the central axis of the right cylinder is the right cylinder axis, the horizontal distance from the left cylinder axis to the longitudinal center plane is a first distance, and the horizontal distance from the right cylinder axis to the longitudinal center plane is a second distance, the upper main beam includes a left upper main beam and a right upper main beam, the left The upper main beam and the right upper main beam each extend along the length direction of the all-terrain vehicle, and a straddle width is defined between the left upper main beam and the right upper main beam, and the straddle width is defined as the third distance; at the longitudinal position closest to the left cylinder axis and the right cylinder axis, there is a top width between the left upper main beam and the right upper main beam, and the top width is defined as having a fourth distance, the fourth distance is greater than the third distance, the first distance or the second distance is less than half of the third distance, and the sum of the first distance and the second distance is less than the fourth distance; a plane perpendicular to the height direction of the frame and passing through the contact point of the walking system with the ground is defined as a reference plane, and the orthographic projection of the cylinder head on the reference plane is defined as a cylinder head projection area; the area surrounded by the orthographic projection of the upper main beam on the reference plane along the height direction of the frame is defined as an upper main beam projection closed area; the part of the cylinder head projection area that falls into the upper main beam projection closed area is defined as the closed area projection, and the ratio of the closed area projection to the area of ​​the cylinder head projection area is in the range of 0.6 to 0.9.

[0010] In the third aspect, an all-terrain vehicle is provided in this embodiment, comprising: a frame, a body covering, a suspension system, a traveling system and an engine, the frame comprising an upper main beam, a lower main beam and a connecting bracket connected between the upper main beam and the lower main beam; the body covering is supported by the frame; the suspension system is supported by the frame; the traveling system is at least partially connected to the frame through the suspension system; the engine is used to drive the traveling system; the engine comprises a left cylinder, a right cylinder, a left cylinder head arranged on the left cylinder and a right cylinder head arranged on the right cylinder; a plane perpendicular to the width direction of the frame and passing through the midpoint of the width of the frame is defined as a longitudinal center plane, the longitudinal center plane passes through the midpoint of the distance between the left front wheel and the right front wheel; the central axis of the left cylinder is the left cylinder axis, the central axis of the right cylinder is the right cylinder axis, the horizontal distance from the left cylinder axis to the longitudinal center plane is a first distance, and the horizontal distance from the right cylinder axis to the longitudinal center plane is a second distance, the upper main beam comprises a left upper main beam and a right upper main beam, the left upper main beam and the right upper main beam are each along the length direction of the all-terrain vehicle Extension, defining a straddle width between the upper left main beam and the upper right main beam, defining the straddle width as the third distance; at the longitudinal position closest to the left cylinder axis and the right cylinder axis, a top width between the upper left main beam and the upper right main beam, defining the top width as having a fourth distance, the fourth distance is greater than the third distance, the first distance or the second distance is less than half of the third distance, and the sum of the first distance and the second distance is less than the fourth distance; the continuously variable transmission mechanism includes a driving wheel and a driven wheel, and the driving wheel is transmission-connected to the driven wheel; the opening of the exhaust duct faces the rear of the all-terrain vehicle, and the rearmost end of the continuously variable transmission mechanism is located in front of the rearmost end of the exhaust duct; the driving wheel is located behind the driven wheel, and the line connecting the orthographic projection of the axis center of the driving wheel on the longitudinal center plane and the orthographic projection of the axis center of the driven wheel on the longitudinal center plane is the transmission projection line, the cylinder has a cylinder axis, and the orthographic projection of the cylinder axis on the longitudinal center plane is the cylinder projection line, and the angle between the cylinder projection line and the transmission projection line opens toward the rear of the all-terrain vehicle, and the angle range is 35° to 75°.

[0011] Compared with the related art, the present invention makes the all-terrain vehicle more powerful, has better heat dissipation effect, and provides better riding comfort to users by reasonably setting the layout of the engine.

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] FIG1 is a perspective schematic diagram of an all-terrain vehicle provided in an embodiment of the present application.

[0014] FIG2 is a top view of the internal structure of the all-terrain vehicle provided in an embodiment of the present application.

[0015] FIG3 is a left side view of the internal structure of the all-terrain vehicle provided in an embodiment of the present application.

[0016] FIG4 is an exploded view of an engine of an all-terrain vehicle provided in an embodiment of the present application.

[0017] FIG5 is a top view of the assembly of the upper main beam and the engine of the all-terrain vehicle provided in an embodiment of the present application.

[0018] FIG6 is a top view of the internal structure of the all-terrain vehicle provided in an embodiment of the present application with the frame removed.

[0019] FIG7 is a cross-sectional view of an engine of an all-terrain vehicle provided in an embodiment of the present application.

[0020] FIG8 is an assembled left view of the engine, frame and travel system of the all-terrain vehicle provided in an embodiment of the present application.

[0021] FIG9 is a side view of the frame, traveling system, powertrain, and exhaust assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0022] FIG10 is a top view of the frame, traveling system, powertrain, and exhaust assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0023] FIG11 is a top view of the frame, running system, powertrain, exhaust assembly, and seat assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0024] FIG12 is an exploded view of the frame, fuel assembly, powertrain, seat assembly, and electrical assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0025] Figure 13 is a top view of the frame, fuel components, powertrain and electrical components of the all-terrain vehicle provided in an embodiment of the present application.

[0026] FIG14 is an exploded view of the structure of the frame, suspension system and rear axle mechanism of the all-terrain vehicle provided in an embodiment of the present application.

[0027] FIG15 is an exploded view of the structure of the electrical components and body covering of the all-terrain vehicle provided in an embodiment of the present application.

[0028] FIG16 is a partial cross-sectional view of the electrical components, body covering, and travel system of the all-terrain vehicle provided in an embodiment of the present application.

[0029] FIG17 is a schematic diagram of the assembly of the instrument mounting cover and the body controller of the all-terrain vehicle provided in an embodiment of the present application.

[0030] FIG18 is a schematic diagram of the assembly of the body controller and the frame of the all-terrain vehicle provided in an embodiment of the present application.

[0031] FIG19 is an exploded view of the instrument front cover and instrument surface cover of the all-terrain vehicle provided in an embodiment of the present application.

[0032] FIG20 is an exploded view of the storage box assembly, frame, seat assembly, and front fender of the all-terrain vehicle provided in an embodiment of the present application.

[0033] FIG21 is an exploded view of the storage box assembly, the first covering side cover, and the second covering side cover of the all-terrain vehicle provided in an embodiment of the present application.

[0034] FIG22 is a schematic structural diagram of the storage cover of the all-terrain vehicle provided in an embodiment of the present application.

[0035] FIG23 is a schematic diagram of the assembly of the storage box assembly and the front fender of the all-terrain vehicle provided in an embodiment of the present application.

[0036] FIG24 is an exploded view of the front fender, frame, and electrical mounting plate of the all-terrain vehicle provided in an embodiment of the present application.

[0037] FIG25 is an exploded view of the electrical mounting plate and electrical components of the all-terrain vehicle provided in an embodiment of the present application.

[0038] FIG26 is a partial right side view of the body covering and powertrain of the all-terrain vehicle provided in an embodiment of the present application.

[0039] FIG27 is an exploded view of the frame, body panels, and powertrain of the all-terrain vehicle provided in an embodiment of the present application.

[0040] Figure 28 is a schematic structural diagram of the frame, body covering and cargo box assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0041] FIG29 is an exploded view of the muffler, body cover, and cargo box assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0042] FIG30 is an exploded view of the structure of the lamp assembly, body cover and taillight harness at the rear of the all-terrain vehicle provided in an embodiment of the present application.

[0043] Figure 31 is a schematic diagram of the wiring harness fixing structure of the all-terrain vehicle provided in an embodiment of the present application.

[0044] Figure 32 is a cross-sectional view of the travel system, suspension system and transmission assembly of the all-terrain vehicle provided in an embodiment of the present application.

[0045] Figure 33 is a partial enlarged view of point B in Figure 32 provided in an embodiment of the present application.

[0046] FIG34 is an exploded view of the travel system, suspension system, and transmission assembly of the all-terrain vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention. Structural, methodological, or functional changes made by ordinary technicians in this field based on these embodiments are all included in the scope of protection of the present invention.

[0048] As shown in Figures 1 to 3, the present application provides an all-terrain vehicle 100. The all-terrain vehicle 100 includes a frame 11, a body panel 12, a running system 13, a suspension system 14, a powertrain 15, a transmission assembly 16, a fuel assembly 17, a seat assembly 19, a steering assembly 20, an electrical assembly 22, and a pedal assembly 27. The frame 11 constitutes the basic structure of the all-terrain vehicle 100. The body panel 12 is at least partially disposed on the frame 11 and surrounds the frame 11 to form a receiving space 115. The powertrain 15 includes an engine 151, which is at least partially disposed within the receiving space 115. The suspension system 14 is at least partially connected to the frame 11, and the running system 13 is connected to the frame 11 via the suspension system 14. The transmission assembly 16 is also in driving connection with the engine 151 and can transmit power from the engine 151 to the running system 13. The fuel assembly 17 is supported by the frame 11. A seat assembly 19 is provided for a user to ride on, and a footrest assembly 27 is disposed below the seat assembly 19. A steering assembly 20 is operable to steer the ATV 100. To clearly define the technical solution of this application, the terms front, rear, up, down, left, and right are defined as shown in FIG1 , where the front-to-back direction represents the length of the frame 11, the left-to-right direction represents the width of the frame 11, and the up-to-down direction represents the height of the frame 11. A plane perpendicular to the height of the ATV 100 and passing through at least one contact point of the travel system 13 with a horizontal plane is defined as a reference plane 102. A plane perpendicular to the length of the frame 11 and passing through the midpoint of the wheelbase of the ATV 100 is defined as a transverse center plane 105 of the ATV 100. A plane perpendicular to the width of the frame 11 and passing through the midpoint of the width of the ATV 100 is defined as a longitudinal center plane 10s of the ATV 100. The seat assembly 19 spans the longitudinal center plane 10s.

[0049] As shown in Figures 2 to 4, the engine 151 provided in this embodiment of the present application includes a cylinder head 1512, a cylinder 1513, and a cylinder head 1514. Along the height direction of the all-terrain vehicle 100, the cylinder head 1512 is used to enclose the cylinder head 1514, which is connected to the cylinder 1513 and located above the cylinder 1513. Along the width direction of the all-terrain vehicle 100, a plurality of cylinder heads 1514 are distributed along the width direction of the all-terrain vehicle 100. Along the length direction of the all-terrain vehicle 100, the cylinder head 1514 is arranged toward the rear end of the all-terrain vehicle 100. It is understood that, depending on the power requirements of the all-terrain vehicle 100, one, two, three, or more cylinder heads 1514 can be provided, without limitation herein.

[0050] The powertrain 15 also includes a continuously variable transmission mechanism 152 and a magneto 157. The continuously variable transmission mechanism 152 and the engine 151 are arranged along the width of the ATV 100 and are in a transmission connection with the engine 151. The continuously variable transmission mechanism 152 is provided with a driving wheel 1521 and a driven wheel 1522. The driving wheel 1521 is in a transmission connection with the driven wheel 1522. The magneto 157 can be driven to generate electricity. The magneto 157 is located on the right side of the ATV 100, while the driving wheel 1521 is located on the left side.

[0051] As shown in Figures 2 to 5, the vehicle frame 11 includes a main frame 113, which includes an upper main beam 1131, a lower main beam 1132, a longitudinal beam 1133, and a cross beam 1134. The vehicle body panel 12 is supported by at least one of the upper main beam 1131, the lower main beam 1132, and the longitudinal beam 1133. Along the height of the all-terrain vehicle 100, the longitudinal beam 1133 connects the upper main beam 1131 and the lower main beam 1132. The upper main beam 1131 includes two upper main beam tubes that are substantially symmetrically distributed about the longitudinal center plane 10s, and the lower main beam 1132 includes two lower main beam tubes that are substantially symmetrically distributed about the longitudinal center plane 10s. Along the width of the vehicle frame 11, the two upper main beam tubes and the two lower main beam tubes are connected by the cross beam 1134. It will be understood that the upper main beam 1131, the lower main beam 1132, and the crossbeam 1134 surround and form the aforementioned accommodation space 115, with the engine 151 and the transmission assembly 16 at least partially disposed within this accommodation space 115. Specifically, along the height direction of the vehicle frame 11, the distance between the uppermost end of the cylinder head 1514 of the engine 151 and the lowermost end of the upper main beam 1131 ranges from 10 mm to 50 mm. If the distance is less than 10 mm, heat from the cylinder head 1514 will be transferred to the upper portion of the seat cushion, affecting the user experience and making it difficult to install the engine 151. If the distance is greater than 50 mm, the space between the upper main beam 1131 and the lower main beam 1132 will be wasted, making it impossible to install other components.

[0052] The distance between the top of the cylinder head 1514 of the engine 151 and the bottom of the upper main beam 1131 ranges from 20 mm to 40 mm. In some embodiments, the distance between the top of the cylinder head 1514 of the engine 151 and the bottom of the upper main beam 1131 ranges from 25 mm to 35 mm. Through the above arrangement, a reliable distance can be ensured between the cylinder head 1514 and the frame 11, thereby preventing heat from the cylinder head 1514 from being transferred to the frame 11, thereby causing heat conduction and affecting the user experience. It also facilitates the disassembly and assembly of the engine 151, improving the convenience of maintenance and assembly. It can also effectively utilize the space between the upper main beam 1131 and the lower main beam 1132, avoiding space waste, thereby improving the space utilization rate of the all-terrain vehicle 100.

[0053] As shown in Figures 4 to 7, engine 151 also includes at least two cylinder heads 1514 arranged in parallel on cylinders 1513 and a cylinder head 1512 mounted on cylinder heads 1514. The two cylinder heads 1514 are arranged on cylinders 1513. Cylinder heads 1514 are positioned toward the rear of all-terrain vehicle 100. The orthographic projection of cylinder heads 1512 on reference plane 102 is defined as cylinder head projection area S1; the area enclosed by the orthographic projection of upper main beam 1131 on reference plane 102 along the height direction of vehicle frame 11 is defined as upper main beam projection closed area; the portion of cylinder head projection area S1 that falls within the upper main beam projection closed area is defined as closed area projection S2, and the ratio of closed area projection S2 to cylinder head projection area S1 is in the range of 0.6 to 0.9.

[0054] The ratio of the enclosed area projection S2 to the cylinder head projection S1 ranges from 0.6 to 0.9. In fact, when the ratio of the enclosed area projection S2 to the cylinder head projection S1 is less than 0.6, the engine 151 will occupy too little space within the frame 11, resulting in excessive leakage of the cylinder head 1514, which will increase the insulation cost of the ATV 100 and may even cause the center of gravity of the ATV 100 to shift, affecting the stability of the ATV 100.

[0055] Specifically, the ratio of the enclosed area projection S2 to the cylinder head projection area S1 ranges from 0.7 to 0.85. Furthermore, the ratio of the enclosed area projection S2 to the cylinder head projection area S1 ranges from 0.75 to 0.8. This configuration allows the engine 151 to occupy as much of the interior space of the frame 11 as possible, improving the utilization of the interior space of the frame 11. This prevents components of the engine 151 from extending beyond the space enclosed by the frame 11, thus avoiding the need for additional insulation mechanisms or increased insulation costs.

[0056] As one implementation, cylinder head 1514 includes a left cylinder head 1514a and a right cylinder head 1514b. The left and right cylinder heads 1514a and 1514b are distributed along the width of the frame 11 and are arranged substantially parallel to each other. Along the width of the frame 11, the left cylinder head 1514a is located on the left side of the all-terrain vehicle 100, while the right cylinder head 1514b is located on the right side of the all-terrain vehicle 100. Cylinder 1513 includes a left cylinder 1513a and a right cylinder 1513b. The left cylinder head 1514a is located on the left cylinder 1513a, while the right cylinder head 1514b is located on the right cylinder 1513b. The central axis of the left cylinder 1513a is the left cylinder axis, while the central axis of the right cylinder 1513b is the right cylinder axis. The horizontal distance between the left cylinder axis and the longitudinal center plane 10s is a first distance W1, i.e., the left cylinder spacing. The horizontal distance from the right cylinder axis to the longitudinal center plane 10s is the second distance W2, also known as the right cylinder spacing. The ratio between the first distance W1 and the second distance W2 ranges from 0 to 1. The ratio between the first distance W1 and the second distance W2 ranges from 0.2 to 0.8. In one implementation, the ratio between the first distance W1 and the second distance W2 ranges from 0.4 to 0.6. In one implementation, the first distance W1 ranges from 0 mm to 200 mm, and the second distance W2 ranges from 200 mm to 400 mm. If the first distance W1 is 25 mm and the second distance W2 is 130 mm, and the left and right cylinder axes are both located on the same side of the longitudinal center plane 10s, the ratio between the first distance W1 and the second distance W2 is 0.19. In one implementation, if the first distance W1 is 20 mm and the second distance W2 is 95 mm, and the left and right cylinder axes are both located on opposite sides of the longitudinal center plane 10s, the ratio between the first distance W1 and the second distance W2 is 0.21.

[0057] It will be appreciated that a preset gap is provided between the left and right cylinder heads 1514a, 1514b along the width of the vehicle frame 11. As an implementation, the preset gap ranges from 6 mm to 12 mm. This arrangement not only fully utilizes the internal space of the vehicle frame 11, but also ensures sufficient clearance between the left and right cylinder heads 1514a, 1514b, allowing heat generated by the left and right cylinder heads 1514a, 1514b to dissipate quickly, preventing damage to the engine due to overheating. It also prevents heat radiation from affecting each other, thereby reducing heat dissipation efficiency.

[0058] As an implementation, upper main beam 1131 includes a left upper main beam 1131a and a right upper main beam 1131b. Each of the left and right upper main beams 1131a and 1131b extends along the length of the ATV 100. When a rider straddles the ATV 100, a third distance W3, i.e., the straddle width, is defined between the left and right upper main beams 1131a and 1131b at the longitudinal position of the rider's legs. At the longitudinal position closest to the left and right cylinder axes, a fourth distance W4, i.e., the width of the top of the engine 151, is defined between the left and right upper main beams 1131a and 1131b. This fourth distance W4 is greater than the third distance W3.

[0059] As an implementation manner, the first distance W1 or the second distance W2 is less than half of the third distance W3, and the sum of the first distance W1 and the second distance W2 is less than the fourth distance W4.

[0060] As an implementation manner, the first distance W1 is less than half of the fourth distance W4.

[0061] This arrangement allows for a more rational layout between engine 151 and vehicle frame 11, resulting in higher space utilization. It also prevents engine 151 from being excessively offset toward one side of longitudinal center plane 10s, which could affect the rider's grip or increase heat on the rider's legs, thereby increasing insulation costs. Thus, the above arrangement provides a rational layout between engine 151 and upper main beam 1131, facilitating easy grip for the rider's legs and improving ride stability and safety.

[0062] As shown in FIG4 , along the width direction of the vehicle frame 11, the vertical distance between the leftmost side of the left cylinder head 1514a and the longitudinal center plane 10s is set to W5, and the vertical distance between the rightmost side of the right cylinder head 1514b and the longitudinal center plane 10s is set to a sixth distance W6. The ratio of the fifth distance W5 to the sixth distance W6 ranges from 0.2 to 1.8. In one implementation, the ratio of the fifth distance W5 to the sixth distance W6 ranges from 0.5 to 1.5. In one implementation, the ratio of the fifth distance W5 to the sixth distance W6 ranges from 0.8 to 1.2. This arrangement ensures that both the left and right cylinder heads 1514a, 1514b maintain a certain distance from the area where the legs meet, preventing excessive offset. This allows heat generated by the left and right cylinder heads 1514a, 1514b to dissipate quickly, preventing engine damage from overheating. It also prevents heat from affecting the driver's driving experience. In one implementation, the distance between the leftmost side of the engine 151 and the longitudinal center plane 10s is set to a seventh distance, W7, and the distance between the rightmost side of the engine 151 and the longitudinal center plane 10s is set to an eighth distance, W8. The ratio of the seventh distance, W7, to the eighth distance, W8, is set to a range of 0.6 to 1.3. Specifically, the ratio of the seventh distance, W7, to the eighth distance, W8, is set to a range of 0.7 to 1.2. In another implementation, the ratio of the seventh distance, W7, to the eighth distance, W8, is set to a range of 0.8 to 1. In fact, the ratio of the seventh distance W7 to the eighth distance W8 can also be set to 0.9. With this setting, the engine 151 can be set narrower in the width direction of the frame 11, the driver has a better grip when riding, the human-machine relationship is good, and the user experience is greatly improved.

[0063] As shown in Figures 1 to 3, the steering assembly 20 is mounted on the frame 11 and located at the front of the ATV 100. The engine 151 also includes an air intake assembly 1516 and an air intake port 1517. The air intake port 1517 is mounted on the engine 151 housing and connected to the air intake assembly 1516. The air intake assembly 1516 includes an air intake pipe and an air filter. The air intake pipe connects the air filter and the air intake port 1517, thereby delivering filtered air to the air intake port 1517 to meet the air intake needs of the engine 151. In one implementation, the orthographic projection of the frame 11 onto the reference plane 102 is referred to as the first projection, and the orthographic projection of the air intake port 1517 onto the reference plane 102 is referred to as the second projection. The second projection is located in an area outside the first projection. The air intake port 1517 is located between the steering assembly 20 and the cylinder head 1514, ensuring smoother air intake and facilitating the layout of the air intake structure.

[0064] As shown in Figure 3, the fuel assembly 17 includes a fuel tank 171, which is used to power the engine 151. Along the length of the ATV 100, the air filter is positioned between the fuel tank 171 and the engine 151. Specifically, the engine 151 is positioned at the rear, the fuel tank 171 is positioned at the front, and the air filter is positioned in the middle. Along the height of the ATV 100, the fuel tank 171 is positioned between the upper main beam 1131 and the lower main beam 1132. The fuel tank 171 can be positioned near the upper main beam 1131.

[0065] As shown in FIG5 , the fuel tank 171 can also be arranged near the lower main beam 1132 , thereby lowering the center of gravity of the all-terrain vehicle 100 and improving the maneuverability of the all-terrain vehicle 100 ; at the same time, the space at the front of the all-terrain vehicle 100 can be fully utilized.

[0066] As shown in Figures 3 and 8, the cylinder 1513 has a cylinder axis 10m, and the orthographic projection of the cylinder axis 10m on the longitudinal center plane 10s is the cylinder projection line. The angle κ between the cylinder projection line and the reference plane 102 ranges from 45° to 65°. As another embodiment, the angle κ between the cylinder projection line and the reference plane 102 ranges from 50° to 60°. Through such a setting, the height of the cylinder head 1514 of the engine 151 can be controlled within a reasonable area, which is beneficial to the layout of the entire vehicle, making the layout structure of the engine 151 compact, and facilitating a smoother flow of the intake and exhaust systems of the engine 151, thereby improving the performance and reliability of the engine 151.

[0067] Specifically, the line connecting the orthographic projection of the axis center of the driving wheel 1521 on the longitudinal center plane 10s and the orthographic projection of the axis center of the driven wheel 1522 on the longitudinal center plane 10s is the transmission projection line 152a. The angle β formed by the cylinder projection line and the transmission projection line 152a is positioned toward the rear of the all-terrain vehicle 100, and the angle β ranges from 35° to 75°. Specifically, the angle β formed by the cylinder projection line and the transmission projection line 152a ranges from 40° to 70°. More specifically, the angle β formed by the cylinder projection line and the transmission projection line 152a ranges from 45° to 65°. For example, in this embodiment, the angle β formed by the cylinder projection line and the transmission projection line 152a is 64.7°. This arrangement facilitates the rearward routing of the exhaust pipe 321, thereby shortening the overall length of the exhaust pipe 321. Furthermore, the above arrangement can prevent the included angle β between the cylinder projection line and the transmission projection line 152a from being too large, thereby increasing the length of the exhaust pipe 321 and thus shortening the overall length of the exhaust pipe 321. Furthermore, the above arrangement can prevent the included angle β between the cylinder projection line and the transmission projection line 152a from being too small, thereby preventing the cylinder head 1514 from being too rearward-facing, thereby preventing the cylinder head 1514 from interfering with the assembly of other components.

[0068] As shown in Figure 2, the pedal assembly 27 is disposed on both sides of the width of the frame 11. Specifically, the pedal assembly 27 includes a left pedal 271 and a right pedal 272, which are substantially symmetrically arranged about the longitudinal center plane 10s. As one implementation, the left pedal 271 is provided with left pedal serrations 2711 to increase friction, while the right pedal 272 is provided with right pedal serrations 2721 to increase friction. Both the left pedal serrations 2711 and the right pedal serrations 2721 can be configured to suit the shape of the pedals. As one implementation, the left pedal serrations 2711 and the right pedal serrations 2721 are rectangular. The orthographic projection of the left pedal serrations 2711 onto the reference plane 102 is the left pedal serration projection 2711a, while the orthographic projection of the right pedal serrations 2721 onto the reference plane 102 is the right pedal serration projection 2721a. As an implementation, the walking system 13 includes a front wheel 132 and a rear wheel 133. The front wheel 132 has a first rotation center 132a, and the rear wheel 133 has a second rotation center 133a. Along the length of the frame 11, the left pedal serrated projection 2711a and the right pedal serrated projection 2721a are located between the first rotation center 132a and the second rotation center 133a, and are located in the middle of the first rotation center 132a and the second rotation center 133a. As an implementation, the front wheel 132 includes a left front wheel 1321 and a right front wheel 1322, and the rear wheel 133 includes a left rear wheel 1331 and a right rear wheel 1332. The longitudinal center plane 10s passes through the midpoint of the distance between the left front wheel 1321 and the right front wheel 1322. The orthographic projections of the left front wheel 1321, the right front wheel 1322, the left rear wheel 1331 and the right rear wheel 1332 within the reference plane 102 form a projection area, and the left pedal serrated projection 2711a and the right pedal serrated projection 2721a are both arranged within the projection area.

[0069] As an implementation, along the length of the ATV 100, the distance L between the rightmost side of the left pedal serrated projection 2711a and the rotation center of the driving wheel 1521 is greater than 0 to 420 mm. The distance between the leftmost side of the right pedal serrated projection 2721a and the rotation center of the magnetic motor 157 is greater than 0 to 420 mm. If the distance between the left pedal serrated projection 2711a and the rotation center of the driving wheel 1521 is greater than 420 mm, the center of gravity of the ATV 100 shifts rearward, resulting in poor stability. If the distance between the right pedal serrated projection 2721a and the rotation center of the magnetic motor 157 is greater than 420 mm, the center of gravity of the ATV 100 shifts rearward, resulting in poor stability. It is understood that along the length of the ATV 100, the distance between the rightmost side of the left pedal serrated projection 2711a and the rotation center of the driving wheel 1521 ranges from 40 mm to 380 mm. The distance between the leftmost side of the right pedal serrated projection 2721a and the rotation center of the magnetic motor 157 ranges from 40 mm to 380 mm. Furthermore, along the length of the all-terrain vehicle 100, the distance between the rightmost side of the left pedal serrated projection 2711a and the rotation center of the driving wheel 1521 ranges from 60 mm to 300 mm. The distance between the leftmost side of the right pedal serrated projection 2721a and the rotation center of the magnetic motor 157 ranges from 60 mm to 300 mm.

[0070] As an implementation, the distance between the rightmost side of the left pedal serrated projection 2711a and the leftmost side of the driving wheel 1521 is set to be greater than 0 to 150 mm, and the distance between the rightmost side of the right pedal serrated projection 2721a and the rightmost side of the magnetic motor 157 is set to be greater than 0 to 150 mm. It is understood that the distance between the rightmost side of the left pedal serrated projection 2711a and the leftmost side of the driving wheel 1521 is set to be in the range of 40 mm to 110 mm, and the distance between the rightmost side of the right pedal serrated projection 2721a and the rightmost side of the magnetic motor 157 is set to be in the range of 40 mm to 110 mm. Further, the distance between the rightmost side of the left pedal serrated projection 2711a and the leftmost side of the driving wheel 1521 is set to be in the range of 60 mm to 90 mm, and the distance between the rightmost side of the right pedal serrated projection 2721a and the rightmost side of the magnetic motor 157 is set to be in the range of 60 mm to 90 mm. Through the above-mentioned arrangement, the layout of the engine 151 can be effectively improved, and the engine 151 can be arranged in a larger central position of the all-terrain vehicle 100, and the cylinder head 1514 can be effectively directed toward the rear of the all-terrain vehicle 100, so that the heat of the engine 151 can be effectively kept away from the driver and passenger, thereby effectively improving the user experience.

[0071] As shown in Figures 9 to 12, the running system 13 includes rear wheels 133, and the suspension system 14 connects the rear wheels 133 to the vehicle frame 11. The powertrain 15 is supported by the vehicle frame 11 and is in driving connection with the rear wheels 133 to drive the rear wheels 133. The all-terrain vehicle 100 also includes an exhaust assembly 32 for conveying and discharging exhaust gas generated by the powertrain 15.

[0072] The powertrain 15 includes an engine 151, which is in driving connection with the rear wheels 133 so that the engine 151 drives the rear wheels 133 to rotate. Specifically, the engine 151 includes an exhaust passage 1515, which is used to discharge exhaust gas generated when the engine 151 is running and transport the exhaust gas generated by the engine 151 to the exhaust assembly 32.

[0073] More specifically, the exhaust assembly 32 includes an exhaust pipe 321 and a muffler 322. The exhaust pipe 321 is used to transport exhaust gas, and the muffler 322 is used to reduce the noise generated when the exhaust pipe 321 transports the exhaust gas. The exhaust pipe 321 is connected to the exhaust duct 1515, and the muffler 322 is connected to the exhaust pipe 321.

[0074] In this embodiment, the opening of the exhaust duct 1515 is positioned rearward. This arrangement allows the exhaust pipe 321 connected to the exhaust duct 1515 to be routed directly rearward, thereby shortening the overall length of the exhaust pipe 321 and, in turn, reducing the cost of the exhaust pipe 321. Furthermore, this arrangement also helps reduce the space occupied by the exhaust pipe 321 within the ATV 100, thereby providing more space for other components. This ensures that the exhaust pipe 321 does not interfere with the assembly of other components, thereby improving the compactness of the ATV 100.

[0075] Furthermore, in the present application, the exhaust gas generated by the engine 151 contains a large amount of heat. Therefore, the above-described arrangement allows the exhaust pipe 321 to be arranged rearward and shortened, thereby shortening the exhaust gas flow path within the ATV 100 and, in turn, reducing the heat transfer of the exhaust gas within the ATV 100, thereby lowering the overall temperature of the ATV 100 and improving the driving comfort of the ATV 100. Furthermore, in the present application, the seat assembly 19 (see FIG. 6 ) is located in front of the exhaust duct 1515. Therefore, by arranging the exhaust pipe 321 rearward, the exhaust pipe 321 can be arranged away from the seat assembly 19, thereby reducing the heat transferred from the exhaust gas in the exhaust pipe 321 to the seat assembly 19, further improving the driving comfort of the ATV 100.

[0076] In this embodiment, the orthographic projection of the exhaust duct 1515 on the reference plane 10r is exhaust projection 1515a, and the orthographic projection of the axis of the rear wheel 133 on the reference plane 10r is rear axle projection line 133a. The minimum distance D14 between the exhaust projection 1515a and the rear axle projection line 133a ranges from 250 mm to 400 mm. Specifically, the minimum distance D14 between the exhaust projection 1515a and the rear axle projection line 133a ranges from 300 mm to 350 mm. More specifically, the minimum distance D14 between the exhaust projection 1515a and the rear axle projection line 133a is 325 mm. This arrangement prevents the exhaust duct 1515 from being too far back due to the minimum distance D14 between the exhaust projection 1515a and the rear axle projection line 133a being too small, thereby preventing the exhaust duct 1515 from being too far back and causing the engine 151 to be too far back. This prevents the engine 151 from interfering with the assembly of components located at the rear of the frame 11, thereby improving the operating stability of the components at the rear of the frame 11. Furthermore, it also prevents the exhaust duct 321 from being too long due to the minimum distance D14 between the exhaust projection 1515a and the rear axle projection line 133a being too large, thereby shortening the overall length of the exhaust duct 321, preventing the exhaust duct 321 from interfering with the assembly of other components, and thereby improving the structural compactness of the exhaust duct 321. Furthermore, it also prevents the exhaust duct 321 from being too far back due to excessive heat transfer from the exhaust gas within the ATV 100, thereby reducing the overall temperature of the ATV 100 and improving the driving comfort of the ATV 100.

[0077] In one embodiment, the exhaust pipe 321 extends rearward along the length of the frame 11 and is divided by a longitudinal center plane 10s. This arrangement allows the exhaust pipe 321 to be centrally located along the width of the ATV 100, thereby preventing the exhaust pipe 321 from being biased to one side and causing excessive temperatures at the location of the exhaust pipe 321. This allows for a gap between the exhaust pipe 321 and both sides of the ATV 100 along the width of the exhaust pipe 321. This gap can partially block heat dissipated by the exhaust pipe 321, thereby reducing the overall heat of the ATV 100. Furthermore, the centrally located exhaust pipe 321 also shortens its routing within the ATV 100, thereby reducing its overall length.

[0078] As an embodiment, the length L6 of the exhaust pipe 321 along the length of the ATV 100 ranges from 350 mm to 600 mm. Specifically, the length L6 of the exhaust pipe 321 ranges from 400 mm to 550 mm. More specifically, the length L6 of the exhaust pipe 321 ranges from 450 mm to 500 mm. This configuration prevents the exhaust pipe 321 from being too long, which could interfere with the assembly of other components, thereby improving the structural compactness of the exhaust pipe 321. Furthermore, it prevents the exhaust pipe 321 from being too long, which could cause the exhaust gas in the exhaust pipe 321 to conduct excessive heat within the ATV 100. This helps reduce the overall temperature of the ATV 100 and improve the driving comfort of the ATV 100.

[0079] When viewed from the height of the ATV 100, the exhaust pipe 321 is disposed between the left upper main beam 1131a and the right upper main beam 1131b. The suspension system 14 includes a swingarm 145 and a shock absorber 147. The swingarm 145 connects the rear wheel 133 to the vehicle frame 11. The shock absorber 147 is connected to the swingarm 145 and the vehicle frame 11 at both ends, respectively, to provide cushioning for the swingarm 145. Specifically, when viewed from the width of the ATV 100, the shock absorber 147 and the exhaust pipe 321 at least partially overlap. This arrangement prevents interference between the exhaust pipe 321 and the shock absorber 147 during assembly. Furthermore, this arrangement prevents the exhaust pipe 321 from occupying the space above the shock absorber 147, which would otherwise reduce the available space. This facilitates the placement of a larger shock absorber 147, thereby improving its damping effect and, consequently, enhancing the comfort of the ATV 100.

[0080] As shown in Figures 21 and 22, the body panel 12 further includes a first cover side cover 1206 and a second cover side cover 1207. Specifically, the glove box assembly 1205, the first cover side cover 1206, and the second cover side cover 1207 are at least partially supported by the vehicle frame 11. Along the length of the vehicle frame 11, the glove box assembly 1205, the first cover side cover 1206, and the second cover side cover 1207 are at least partially positioned between the front fender 126 and the seat assembly 19. The first cover side cover 1206 and the second cover side cover 1207 are located on either side of the glove box assembly 1205 along the width of the vehicle frame 11. The first cover side cover 1206 and the front fender 126 define a first space 1206a, while the second cover side cover 1207 and the front fender 126 define a second space 1207a. With such an arrangement, the first space 1206 a and the second space 1207 a can provide space for arranging components, thereby facilitating improvement in space utilization at the first covering side cover 1206 and the second covering side cover 1207 .

[0081] More specifically, the storage box assembly 1205 is at least partially located within the first space 1206a and / or the second space 1207a. This arrangement allows the storage box assembly 1205 to utilize the space provided by the first space 1206a and / or the second space 1207a, thereby increasing the space occupied by the storage box assembly 1205 and, in turn, increasing the storage capacity of the storage box assembly 1205, thereby improving the storage function of the all-terrain vehicle 100.

[0082] In this embodiment, the volume of the storage box assembly 1205 ranges from 6L to 10L. Specifically, the volume of the storage box assembly 1205 ranges from 7L to 9L. More specifically, the volume of the storage box assembly 1205 is 8L. This arrangement prevents the storage box assembly 1205 from interfering with other components within the first and second spaces 1206a, 1207a due to an excessively large volume range, thereby improving space utilization within the first and second spaces 1206a, 1207a. It also prevents the storage box assembly 1205 from being too small, thereby reducing the available storage space, thereby improving the storage capacity of the storage box assembly 1205.

[0083] As shown in Figures 15 and 16, the electrical component 22 includes a body control module (BCM) 222 and an instrument panel 223. The body control module 222 is used to control the electronic equipment of the all-terrain vehicle 100, and the instrument panel 223 is used to display vehicle information.

[0084] Specifically, the vehicle body panel 12 includes an instrument panel mounting cover 1204. An instrument panel 223 and a vehicle body controller 222 are both mounted on the instrument panel mounting cover 1204. The vehicle body controller 222 is located below the instrument panel 223. Specifically, the minimum distance D7 between the vehicle body controller 222 and the reference plane 102 along the height direction of the vehicle frame 11 ranges from 850 mm to 1270 mm. More specifically, the minimum distance D7 between the vehicle body controller 222 and the reference plane 102 along the height direction of the vehicle frame 11 ranges from 950 mm to 1170 mm. Furthermore, the minimum distance D7 between the vehicle body controller 222 and the reference plane 102 along the height direction of the vehicle frame 11 is 1028 mm. This arrangement prevents the minimum distance D7 between the body controller 222 and the reference plane 102 along the height direction of the vehicle frame 11 from being too small, which could result in the body controller 222 being too close to the reference plane 102. This prevents the body controller 222 from coming into contact with water and potentially being damaged when the all-terrain vehicle 100 is wading, thereby improving the protection of the body controller 222. Furthermore, this arrangement prevents the minimum distance D7 between the body controller 222 and the reference plane 102 along the height direction of the vehicle frame 11 from being too large, which could result in the center of gravity of the body controller 222 being too high. This prevents the center of gravity of the body controller 222 being too high, which could lead to unstable operation of the all-terrain vehicle 100, thereby improving the driving stability of the all-terrain vehicle 100.

[0085] In one embodiment, the instrument mounting cover 1204 includes an instrument front cover 1204a and an instrument surface cover 1204b. Specifically, the instrument front cover 1204a is at least partially located in front of the instrument surface cover 1204b. The instrument surface cover 1204b is located on and connected to the instrument front cover 1204a. The instrument panel 223 is mounted on the instrument surface cover 1204b. More specifically, the connection between the instrument surface cover 1204b and the instrument front cover 1204a forms a storage space 1204j, and the body controller 222 is located within the storage space 1204j. This arrangement improves the space utilization between the instrument surface cover 1204b and the instrument front cover 1204a, allowing the body controller 222 to be arranged in the space between the instrument surface cover 1204b and the instrument front cover 1204a, thereby improving the compactness of the instrument surface cover 1204b, the instrument front cover 1204a, and the body controller 222.

[0086] As shown in Figures 17 and 18, the vehicle frame 11 includes a support frame 111. The support frame 111 is located within the accommodating space 1204j and connects the instrument front cover 1204a and the instrument surface cover 1204b. The support frame 111 is configured to provide support for the instrument front cover 1204a and the instrument surface cover 1204b. This arrangement allows the support frame 111 to limit the relative position between the instrument front cover 1204a and the instrument surface cover 1204b, thereby improving the connection stability between the instrument front cover 1204a and the instrument surface cover 1204b, thereby facilitating the improvement of the strength of the connection between the instrument front cover 1204a and the instrument surface cover 1204b, and thus improving the structural stability of the all-terrain vehicle 100.

[0087] In addition, the body controller 222 is installed on the support frame 111 , which can reduce additional installation points on the vehicle frame 11 for fixing the body controller 222 , thereby helping to simplify the structure of the vehicle frame 11 .

[0088] As shown in FIG18 , the support frame 111 includes a front transverse bar 1111, a rear transverse bar 1112, a left longitudinal bar 1113, and a right longitudinal bar 1114. The two ends of the left longitudinal bar 1113 are respectively connected to one end of the front transverse bar and one end of the rear transverse bar 1112. The two ends of the right longitudinal bar 1114 are respectively connected to the other end of the front transverse bar 1111 and the other end of the rear transverse bar 1112. Both ends of the front transverse bar 1111 are connected to the instrument front cover 1204a. The rear ends of the left longitudinal bar 1113 and the rear ends of the right longitudinal bar 1114 are both connected to the instrument surface cover 1204b. This arrangement allows the support frame 111 to form a frame structure through the connection between the front transverse bar 1111, the rear transverse bar 1112, the left longitudinal bar 1113, and the right longitudinal bar 1114, thereby improving the support function for the instrument mounting cover 1204 and thereby enhancing the structural stability of the instrument mounting cover 1204.

[0089] In one embodiment, the body controller 222 is mounted on the front transverse bar 1111 and the rear transverse bar 1112, and is also mounted on at least one of the left longitudinal bar 1113 and the right longitudinal bar 1114. This arrangement ensures the stability of the connection between the body controller 222 and the support frame 111 while allowing the body controller 222 to avoid other components on the support frame 111, thereby improving the structural compactness of the support frame 111.

[0090] As shown in FIG19 , the instrument surface cover 1204b is provided with a hook structure 1204c and a first plug structure 1204d, both of which are located at the front portion of the instrument surface cover 1204b. Specifically, the instrument front cover 1204a is provided with a plug slot 1204e and a latching portion 1204f. The plug slot 1204e is configured to plug into the first plug structure 1204d, and the first plug structure 1204d abuts against the bottom of the plug slot 1204e. This arrangement limits the relative position of the instrument surface cover 1204b and the instrument front cover 1204a during assembly, thereby preventing over-assembly of the instrument surface cover 1204b and the instrument front cover 1204a and improving the assembly accuracy of the instrument surface cover 1204b and the instrument front cover 1204a.

[0091] More specifically, the engaging portion 1204f is configured to engage with the hook structure 1204c. This arrangement allows the engagement of the engaging portion 1204f and the hook structure 1204c to achieve connection between the instrument surface cover 1204b and the instrument front cover 1204a, thereby preventing the instrument surface cover 1204b and the instrument front cover 1204a from detaching, thereby improving the connection stability between the instrument surface cover 1204b and the instrument front cover 1204a.

[0092] Through the above arrangement, the abutment between the first plug structure 1204d and the plug slot 1204e can simplify the assembly process of the instrument surface cover 1204b and the instrument front cover 1204a, thereby improving assembly efficiency. In addition, the above-mentioned clamping method can facilitate the disassembly and assembly between the instrument surface cover 1204b and the instrument front cover 1204a, thereby further simplifying the assembly process of the instrument surface cover 1204b and the instrument front cover 1204a, and further improving the assembly efficiency of the instrument surface cover 1204b and the instrument front cover 1204a.

[0093] In one embodiment, the instrument front cover 1204a is further disposed at least partially around both sides of the instrument surface cover 1204b along the width direction of the vehicle frame 11. The instrument surface cover 1204b is fixedly connected to the instrument front cover 1204a on both sides along the width direction of the vehicle frame 11. In some embodiments, the instrument surface cover 1204b is fixedly connected to the instrument front cover 1204a on both sides along the width direction of the vehicle frame 11 via bolts, thereby facilitating improved connection stability between the instrument front cover 1204a and the instrument surface cover 1204b.

[0094] As shown in FIG17 , the body panel 12 also includes a storage compartment assembly 1205, which is at least partially supported by the vehicle frame 11 and serves to enhance the storage capabilities of the ATV 100. The storage compartment assembly 1205 is at least partially located behind the instrument panel 1204b (see FIG15 ), which engages with the instrument panel 1204b. This arrangement eliminates the need for additional mounting points on the vehicle frame 11 for securing the storage compartment assembly 1205, thereby simplifying the structure of the vehicle frame 11.

[0095] As shown in Figure 15 , the instrument panel cover 1204b and the storage box assembly 1205 are connected via an A-shaped buckle. This arrangement, which is a plastic or metal buckle with an A-shape, allows for manual assembly and disassembly, simplifying the assembly and disassembly process of the instrument panel cover 1204b and the storage box assembly 1205 and improving assembly efficiency. Furthermore, the A-shaped buckle can be used multiple times, facilitating repeated assembly and disassembly of the instrument panel cover 1204b and the storage box assembly 1205, further facilitating subsequent maintenance and disassembly of the instrument panel cover 1204b and the storage box assembly 1205.

[0096] As shown in Figures 15 and 19, the body panel 12 also includes a front fender 126. This front fender 126 prevents splashing dirt, sand, and gravel from entering the interior of the ATV 100, thereby improving protection for the internal components of the ATV 100. A front instrument panel 1204a is mounted on the front fender 126. Specifically, the front instrument panel 1204a is provided with a second plug-in structure 1204g and a snap-in structure 1204h. The second plug-in structure 1204g is located at the front of the front instrument panel 1204a, and the snap-in structures 1204h are located on either side of the front instrument panel 1204a along the width of the vehicle frame 11. The front fender 126 is provided with a plug-in interface 1262 and a snap-in interface 1263. The plug-in interface 1262 is configured to plug into the second plug-in structure 1204g. Such a setting can serve as a limit for the assembly of the front fender 126 and the instrument front cover 1204a; it can also serve as a pre-positioning during the assembly process of the front fender 126 and the instrument front cover 1204a, thereby helping to simplify the assembly process of the front fender 126 and the instrument front cover 1204a.

[0097] More specifically, the card interface 1263 is configured to engage with the card structure 1204h. In some embodiments, the card structure 1204h is an A-type buckle, which simplifies the assembly and disassembly process of the front fender 126 and the instrument front cover 1204a, thereby improving the assembly efficiency of the front fender 126 and the instrument front cover 1204a. This also facilitates the disassembly, assembly, and maintenance of the front fender 126 and the instrument front cover 1204a.

[0098] As shown in Figure 20, the powertrain 15 also includes an air filter intake duct 155 and a transmission intake duct 153. The air filter intake duct 155 is connected to the air filter mechanism 154 and is used to supply air to the air filter mechanism 154. The transmission intake duct 153 is connected to the transmission mechanism 152 and is used to supply gas to the transmission mechanism 152. Specifically, when viewed from the height of the vehicle frame 11, the glove box assembly 1205 at least partially overlaps with the air filter intake duct 155, and the glove box assembly 1205 at least partially overlaps with the transmission intake duct 153. This arrangement improves the structural compactness of the glove box assembly 1205.

[0099] As shown in Figures 20 and 21 , the maximum distance D8 between the first and second side covers 1206, 1207 along the width of the vehicle frame 11 is greater than the maximum width D5 of the seat assembly 19 along the width of the vehicle frame 11. This arrangement increases the volume of the first and second spaces 1206a, 1207a, thereby facilitating the placement of a larger storage box assembly 1205 within the first and / or second spaces 1206a, 1207a, and further increasing the storage capacity of the storage box assembly 1205.

[0100] In one embodiment, the storage box assembly 1205 includes an upper box body 1205a and a lower box body 1205b, with the upper box body 1205a and the lower box body 1205b being fixedly connected. Specifically, the upper box body 1205a is provided with a storage opening 1205c. This arrangement allows items to be stored and retrieved from the storage box assembly 1205 through the storage opening 1205c. More specifically, both the upper box body 1205a and the lower box body 1205b are at least partially located within the first space 1206a and / or the second space 1207a. When viewed from the height of the vehicle frame 11, the storage opening 1205c does not overlap with the first space 1206a, and the storage opening 1205c does not overlap with the second space 1207a. This arrangement can prevent the first covering side cover 1206 in the first space 1206a and the second covering side cover 1207 in the second space 1207a from interfering with taking items from the storage opening 1205c, thereby improving the convenience of using the storage box assembly 1205.

[0101] Furthermore, by separating the storage box assembly 1205 into an upper box body 1205a and a lower box body 1205b, storage spaces can be separately fabricated within the upper box body 1205a and the lower box body 1205b. This avoids the problem of a monolithic structure preventing the inability to create a large storage space within the storage box assembly 1205. This arrangement simplifies the fabrication process for the storage space within the storage box assembly 1205 while also increasing the volume of the storage space within the storage box assembly 1205.

[0102] As shown in Figure 21, the lower case 1205b is provided with a first through hole 1205d and a second through hole 1205e, which are located at the front of the lower case 1205b. The first through hole 1205d is used to fix the cigarette lighter, and the second through hole 1205e is used to fix the USB connector.

[0103] As shown in Figures 21 and 22, storage box assembly 1205 includes a storage cover 1205f, which is rotatably connected to upper case 1205a and configured to cover storage opening 1205c. This arrangement allows storage cover 1205f to shield storage opening 1205c, preventing items within storage box assembly 1205 from falling through storage opening 1205c during travel of ATV 100, thereby improving storage security of storage box assembly 1205.

[0104] Specifically, one side of the storage cover 1205f has a rotation axis 1205g and an extension 1205h. The extension 1205h is generally U-shaped, with the rotation axis 1205g located at the end of the extension 1205h away from the storage cover 1205f. The rotation axis 1205g is rotatably connected to the upper case 1205a. This arrangement allows the storage cover 1205f to be opened and closed by rotating the rotation axis 1205g. Furthermore, the U-shaped extension 1205h prevents interference between the extension 1205h and other components during rotation, allowing the storage cover 1205f to open and close normally.

[0105] More specifically, the side of the storage cover 1205f away from the extension 1205h has a cover connection portion 1205i. The lower box 1205b at least partially extends upward to form a fixing boss 1205j. The fixing boss 1205j is located at the rear of the lower box 1205b. The cover connection portion 1205i can be inserted through the fixing boss 1205j and engage with the fixing boss 1205j. This arrangement facilitates the opening and closing of the storage cover 1205f and the upper box 1205a, thereby improving the ease of use of the storage box assembly 1205.

[0106] As an embodiment, a limiting portion 1205k is provided on the extension portion 1205h, and the limiting portion 1205k is configured to limit the rotation angle of the storage cover 1205f relative to the upper box body 1205a, thereby preventing the storage cover 1205f from rotating too much and causing interference between the storage cover 1205f and other components on the all-terrain vehicle 100.

[0107] Specifically, when storage cover 1205f covers storage opening 1205c, its two sides along the width of frame 11 can respectively fit over first and second side covers 1206, 1207 (see FIG20 ). This arrangement improves the smoothness of storage cover 1205f, first and second side covers 1206, 1207, thereby enhancing the driving comfort of ATV 100. Furthermore, it helps reduce wind resistance at storage cover 1205f, thereby reducing the wind resistance of ATV 100 and, in turn, reducing the energy consumption of ATV 100.

[0108] As shown in Figure 21, a storage box assembly 1205 is at least partially located within the first space 1206a. The ATV 100 also includes a shift assembly 18, which is at least partially located within the second space 1207a and connected to the second side cover 1207. This arrangement prevents interference between the storage box assembly 1205 and the shift assembly 18 and also helps improve space utilization within the first and second spaces 1206a, 1207a, thereby enhancing the compactness of the structures within the first and second spaces 1206a, 1207a. Specifically, the shift assembly 18 is configured as an electronic shifter 181. This electronic shifter 181 can improve shift response speed, thereby enhancing the handling performance of the ATV 100.

[0109] In one embodiment, the shift assembly 18 is snap-fitted to the second side cover 1207 and fixedly connected via fasteners. This arrangement improves the installation stability of the shift assembly 18 within the second space 1207a. Furthermore, the shift assembly 18 is fixedly connected to the glove box assembly 1205. This arrangement further improves the installation stability of the shift assembly 18 within the second space 1207a.

[0110] Specifically, a mounting post 1205m is formed upwardly, at least partially, on the side of the storage box assembly 1205 near the second cover side cover 1207. This post is passed through the shift assembly 18 and fixedly connected to the mounting post 1205m via a fastener. In some embodiments, a mounting post 1205m is formed upwardly, at least partially, on the side of the upper case 1205a near the second cover side cover 1207. The mounting post 1205m is a boss post, and the fastener is a screw. This arrangement allows the screw to pass through the shift assembly 18 and threadably connect to the boss post, thereby achieving a secure connection between the shift assembly 18 and the upper case 1205a, improving the stability of the connection between the shift assembly 18 and the upper case 1205a.

[0111] As shown in Figure 21, the storage box assembly 1205 is provided with mounting bosses 1205n on both sides along the width of the vehicle frame 11. Furthermore, a snap-fit ​​structure 1205p is provided on the side of the first side cover 1206 proximal to the storage box assembly 1205, and on the side of the second side cover 1207 proximal to the storage box assembly 1205. The snap-fit ​​structure 1205p penetrates and snaps into the mounting bosses 1205n. This snap-fit ​​connection simplifies the assembly process of the storage box assembly 1205 with the first side cover 1206 and the second side cover 1207, thereby improving assembly efficiency of the storage box assembly 1205.

[0112] In this embodiment, the buckle structure 1205p is an A-type buckle. This arrangement allows the A-type buckle to be manually assembled and disassembled, thereby further simplifying the assembly process of the storage box assembly 1205 with the first and second covering side covers 1206 and 1207, and improving the assembly efficiency of the storage box assembly 1205.

[0113] In some embodiments, mounting bosses 1205n are provided on both sides of the lower box 1205b along the width direction of the vehicle frame 11. In this embodiment, the lower box 1205b bears the weight of the items, and the lower box 1205b is connected to the first covering side cover 1206 and the second covering side cover 1207 via the mounting bosses 1205n, thereby improving the overall installation stability of the storage box assembly 1205.

[0114] In one embodiment, the storage box assembly 1205 is further provided with box mounting holes 1205s on both sides along the width of the vehicle frame 11. Side cover mounting holes 1209 are also provided on the side of the first side cover 1206 proximate to the storage box assembly 1205, and on the side of the second side cover 1207 proximate to the storage box assembly 1205. Fasteners are inserted through the box mounting holes 1205s and side cover mounting holes 1209 to secure the storage box assembly 1205, the first side cover 1206, and the second side cover 1207. In some embodiments, the fasteners may be bolts, which further enhance the stability of the connection between the storage box assembly 1205 and the first and second side covers 1206, 1207.

[0115] In some embodiments, the upper box 1205a is provided with box mounting holes 1205s on both sides along the width of the vehicle frame 11. Along the height of the vehicle frame 11, the side cover mounting holes 1209 are located above the first and second covering side covers 1206, 1207. This arrangement allows both the box mounting holes 1205s and the side cover mounting holes 1209 to be located above the lower box 1205b, preventing interference from the lower box 1205b with the assembly of the box mounting holes 1205s and the side cover mounting holes 1209. This facilitates assembly of the storage box assembly 1205 and the first and second covering side covers 1206, 1207.

[0116] As shown in Figures 21 and 23, the storage box assembly 1205 is provided with a front fixing portion 1205q and a rear fixing portion 1205r. The front fixing portion 1205q is fixedly connected to the front fender 126, and the rear fixing portion 1205r is fixedly connected to the vehicle frame 11. This arrangement further improves the connection stability of the storage box assembly 1205 within the ATV 100, allowing the storage box assembly 1205 to store heavier items, thereby enhancing the storage function of the storage box assembly 1205.

[0117] In some embodiments, the lower box 1205b is provided with a front fixing portion 1205q and a rear fixing portion 1205r. The fixing portion is fixedly connected to the front fender 126 (see FIG. 20 ) by screws, and the rear fixing portion 1205r is fixedly connected to the vehicle frame 11 by screws. In this embodiment, the lower box 1205b bears the weight of the items. Connecting the lower box 1205b to the front fender 126 and the vehicle frame 11 can increase the load-bearing capacity of the lower box 1205b, thereby allowing heavier items to be stored in the storage box assembly 1205, thereby improving the storage efficiency of the storage box assembly 1205.

[0118] As shown in Figures 24 and 25 , the body panel 12 includes an electrical mounting plate 12a, which is supported by the vehicle frame 11 and configured to carry at least a portion of the electrical components 22. Specifically, the electrical mounting plate 12a is located below the front fender 126 and is provided with a hook structure 12aa and a fixing portion 12ab. The hook structure 12aa engages with the vehicle frame 11, while the fixing portion 12ab is fixedly connected to the vehicle frame 11. This arrangement, through the hook structure 12aa, secures the electrical mounting plate 12a to the vehicle frame 11, thereby reducing the number of mounting points on the electrical mounting plate 12a for securing the vehicle frame 11 and, consequently, the number of screws required to secure these mounting points, thereby reducing the production cost of the all-terrain vehicle 100. Furthermore, this snap-fit ​​arrangement simplifies the assembly process of the electrical mounting plate 12a and the vehicle frame 11, thereby improving assembly efficiency. In addition, the clamping method is also beneficial for the assembly and disassembly between the electrical installation plate 12a and the frame 11, so as to facilitate the disassembly and maintenance of the electrical installation plate 12a in the later stage. The hook structure 12aa includes a hook body 12ai and a hook portion 12aj, and the hook body 12ai and the hook portion 12aj are integrally formed. Specifically, an opening 12am is formed between the hook portion 12aj and the electrical installation plate 12a, and the frame 11 passes through the opening 12am and is clamped to the hook structure 12aa. In some embodiments, the hook body 12ai and the hook portion 12aj are elastic, and the frame 11 passes through the opening 12am and has an interference fit with the hook structure 12aa12am, so that the frame 11 is clamped to the hook structure 12aa, thereby eliminating the need to fix them by tightening screws, thereby simplifying the assembly process between the electrical installation plate 12a and the frame 11, thereby improving the assembly efficiency of the electrical installation plate 12a and the frame 11.

[0119] As shown in FIG25 , the hook portion 12aj is formed with a guide portion 12an near the opening 12am. The guide portion 12an bends in the opposite direction to the hook portion 12aj. This arrangement allows the guide portion 12an to guide the frame 11 when it is inserted through the opening 12am for assembly, thereby preventing interference between the hook portion 12aj and the frame 11, which could prevent the frame 11 from entering the opening 12am for engagement. This improves the assembly efficiency of the hook structure 12aa and the frame 11.

[0120] As an embodiment, the electrical assembly 22 includes a connecting wire harness 226, which is used for signal and energy transmission. Specifically, in the present application, multiple hook structures 12aa are provided, and gaps 12ac exist between the hook structures 12aa. The gaps 12ac are configured to avoid the connecting wire harness 226. This arrangement prevents interference between the hook structures 12aa and the connecting wire harness 226, thus preventing the connecting wire harness 226 from needing to be routed around the hook structures 12aa. This improves the structural compactness of the electrical mounting plate 12a and the connecting wire harness 226.

[0121] In addition, the above arrangement can also prevent the connecting wire harness 226 from avoiding the hook structure 12 aa, thereby preventing the connecting wire harness 226 from being extended, thereby facilitating shortening the overall length of the connecting wire harness 226 .

[0122] As shown in FIG25 , the hook structure 12aa is formed with a relief portion 12ad. The relief portion 12ad is configured to avoid the front fender 126, thereby providing an assembly gap between the front fender 126 and the relief portion 12ad. This arrangement prevents interference between the hook structure 12aa and the front fender 126, thereby facilitating assembly between the front fender 126 and the appliance mounting plate 12a.

[0123] As an embodiment, the electrical installation panel 12a is provided with a first layout area 12ae and a second layout area 12af. Along the length of the vehicle frame 11, the first layout area 12ae is located in front of the second layout area 12af. Specifically, the electrical assembly 22 includes electrical components 227 and a connecting wiring harness 226. The electrical components 227 are located in the first layout area 12ae, and the connecting wiring harness 226 is located in the second layout area 12af. This arrangement, by dividing the first layout area 12ae and the second layout area 12af on the electrical installation panel 12a, can help improve the neatness of the layout of the electrical components 227 and the connecting wiring harness 226 on the electrical installation panel 12a, thereby improving the space utilization of the electrical installation panel 12a.

[0124] As shown in Figure 25, the first layout area 12ae includes a first area 12ap, a second area 12aq, a third area 12ar, and a fourth area 12as. Along the length of the vehicle frame 11, the first area 12ap is located in front of the second area 12aq. The third area 12ar and the fourth area 12as are located on either side of the first and second areas 12ap and 12aq along the width of the vehicle frame 11. Specifically, the electrical components 227 include a battery 2271, a telematics box (T-BOX) 2272, an on-board diagnostics module (OBD) 2273, a passive entry start (PEPS) module 2274, and a fuse box 228. The all-terrain vehicle 100 includes an oil cup 24 and a heat sink assembly 25, which includes a radiator pipe 251. The battery 2271 stores and provides electrical energy, the onboard communication module 2272 collects and transmits data from the ATV 100, the onboard diagnostic module 2273 monitors and diagnoses faults in the ATV 100, the keyless start module 2274 unlocks and starts the ATV 100 without a traditional key, the oil cup 24 stores lubricating oil, the heat sink assembly 25 dissipates heat from the ATV 100, and the radiator pipe 25 supplies air to the heat sink assembly 25. The fuse box 228 houses a fuse. More specifically, the onboard communication module 2272, onboard diagnostic module 2273, and keyless start module 2274 are all located in the first area 12ap, the battery 2271 is installed in the second area 12aq, the fuse box 228 is located in the third area 12ar, the oil cup 24 is installed in the fourth area 12as, and the radiator pipe 25 runs through the fourth area 12as. By dividing the first arrangement area 12ae into the above four areas, the neatness of the arrangement of the electrical components 227 in the above areas can be further improved, thereby facilitating the improvement of the space utilization rate on the electrical installation parts.

[0125] In one embodiment, the second region 12aq is recessed downward to form a battery space 12at, and the battery 2271 is installed in the battery space 12at. This configuration increases the volume of the second region 12aq to form the battery space 12at, thereby improving the installation stability of the battery 2271 in the battery space 12at.

[0126] In one embodiment, the first region 12ap is provided with a first mounting portion 12au, a second mounting portion 12av, and a third mounting portion 12aw. The first mounting portion 12au and the second mounting portion 12av are arranged along the width of the vehicle frame 11, and the third mounting portion 12aw is located behind the first mounting portion 12au. The first mounting portion 12au is connected to the keyless start module 2274, the second mounting portion 12av is connected to the onboard communication module 2272, and the third mounting portion 12aw is connected to the onboard diagnostic module 2273. In some embodiments, the first mounting portion 12au, the second mounting portion 12av, and the third mounting portion 12aw are each provided with a clip 12ax, and the keyless start module 2274, the onboard communication module 2272, and the onboard diagnostic module 2273 are each provided with a slot 12ay, which is configured to engage with the clip 12ax. With such a configuration, the assembly efficiency of the first mounting portion 12au and the keyless start module 2274, the second mounting portion 12av and the on-board communication module 2272, and the third mounting portion 12aw and the on-board diagnostic module 2273 can be improved through snap connection, so as to facilitate the rapid disassembly and assembly of the above-mentioned electrical components 227.

[0127] As one embodiment, the fourth region 12as defines a conduit hole 12az and an assembly hole 12ao. The oil cup 24 is at least partially inserted through the assembly hole 12ao and mounted on the electrical mounting plate 12a. The radiator conduit 25 is inserted through the conduit hole 12az. This arrangement enhances the structural compactness of the oil cup 24 and the electrical mounting plate 12a through the assembly hole 12ao, thereby improving the space utilization of the electrical mounting plate 12a. Furthermore, the conduit hole 12az prevents interference between the radiator conduit 25 and the electrical mounting plate 12a, which would otherwise cause the radiator conduit 25 to clear the electrical mounting plate 12a. This improves the structural compactness of the radiator conduit 25 and the electrical mounting plate 12a, and also helps shorten the overall length of the radiator conduit 25, thereby reducing the cost of the radiator conduit 25.

[0128] As shown in FIG25 , a plurality of boss structures 12ag are formed between the first arrangement area 12ae and the second arrangement area 12af. A harness groove 12ah is formed between adjacent boss structures 12ag, through which the connecting wire harness 226 passes. This arrangement prevents interference between the connecting wire harness 226 and the boss structures 12ag, which would otherwise force the connecting wire harness 226 to avoid the boss structures 12ag. This improves the compactness of the connecting wire harness 226 and the electrical mounting plate 12a, shortens the overall length of the connecting wire harness 226, and reduces the overall cost of the connecting wire harness 226.

[0129] In this embodiment, the second region 12aq is substantially concave in shape, and the connecting harness 226 further includes a plurality of connecting connectors 2261, which are located within the second region 12aq. This concave-shaped second region 12aq provides a platform for facilitating the placement of the connecting connectors 2261 within the platform, thereby simplifying the assembly process of the connecting connectors 2261 and the second region 12aq, thereby improving assembly efficiency.

[0130] As shown in Figures 26 and 27, the footrest assembly 27 is detachably connected to the front fender 126 and the rear fender 12b, facilitating assembly and removal of the footrest assembly 27. Specifically, the footrest assembly 27 is configured to be removable and assembled along the width of the frame 11. Along the width of the frame 11, the footrest assembly 27 at least partially overlaps with the powertrain 15. By removing the footrest assembly 27 from the ATV 100, the powertrain 15 is exposed across the width of the frame 11, facilitating maintenance of the powertrain 15.

[0131] Specifically, the disassembly of the footrest assembly 27 can be coordinated with the disassembly of the side baffle structure 12 c , thereby increasing the exposed area of ​​the powertrain 15 in the width direction of the vehicle frame 11 , thereby further improving the maintenance convenience of the powertrain 15 .

[0132] In this embodiment, the ratio of the length L1 of the powertrain 15 along the length of the frame 11 to the length L5 of the footrest assembly 27 along the length of the frame 11 is in a range of 1 to 1.4. Specifically, the ratio of the length L1 of the powertrain 15 along the length of the frame 11 to the length L5 of the footrest assembly 27 along the length of the frame 11 is in a range of 1.03 to 1.27. More specifically, the ratio of the length L1 of the powertrain 15 along the length of the frame 11 to the length L5 of the footrest assembly 27 along the length of the frame 11 is 1.15. The present application sets the ratio of the length L1 of the power assembly 15 along the length direction of the frame 11 to the length L5 of the footrest assembly 27 along the length direction of the frame 11 to the above-mentioned range. After the footrest assembly 27 is removed, it can avoid the front fender 126 and / or the rear fender 12b from blocking the power assembly 15, thereby facilitating the maintenance of the power assembly 15, and can also avoid the length of the footrest assembly 27 being too long and causing structural redundancy of the footrest assembly 27, thereby improving the structural compactness of the all-terrain vehicle 100.

[0133] As an implementation method, the orthographic projection of the powertrain 15 on the longitudinal center plane 10s is the assembly projection, and the orthographic projection of the footrest assembly 27 on the longitudinal center plane 10s is the first footrest projection. The overlapping portion of the assembly projection and the first footrest projection is the third overlapping projection, and the ratio of the area of ​​the third overlapping projection to the area of ​​the assembly projection is in the range of 0.17 to 0.27. Specifically, the ratio of the area of ​​the third overlapping projection to the area of ​​the assembly projection is in the range of 0.2 to 0.25. More specifically, the ratio of the area of ​​the third overlapping projection to the area of ​​the assembly projection is 0.22. The present application sets the ratio of the area of ​​the third overlapping projection to the area of ​​the assembly projection to the above range, so that after the footrest assembly 27 is removed from the all-terrain vehicle 100, the powertrain 15 can be fully exposed, thereby facilitating the maintenance of the powertrain 15.

[0134] As an implementation, the left footrest 271 and the right footrest 272 are detachably connected to either side of the front fender 126. The left footrest 271 and the right footrest 272 are also detachably connected to either side of the rear fender 12b. This arrangement positions the left footrest 271 and the right footrest 272 on either side of the powertrain 15 along the width of the frame 11. Removing the left footrest 271 or the right footrest 272 from the ATV 100 facilitates maintenance of the powertrain 15 from the corresponding side.

[0135] Specifically, the left footrest 271 is disposed near the transmission mechanism 152, and the right footrest 272 is disposed near the engine 151. After the left footrest 271 is removed from the ATV 100, the transmission mechanism 152 can be easily repaired; after the right footrest 272 is removed from the ATV 100, the engine 151 can be easily repaired.

[0136] As an implementation, the ratio of the length L3 of the speed change mechanism 152 along the length of the frame 11 to the length L5 of the left footrest 271 along the length of the frame 11 ranges from 0.76 to 1.16. Specifically, the ratio of the length L3 of the speed change mechanism 152 along the length of the frame 11 to the length L5 of the left footrest 271 along the length of the frame 11 ranges from 0.86 to 1.06. More specifically, the ratio of the length L3 of the speed change mechanism 152 along the length of the frame 11 to the length L5 of the left footrest 271 along the length of the frame 11 is 0.96. Due to the large size of the speed change mechanism 152 of the frame 11, this application is primarily intended to facilitate maintenance of the speed change mechanism 152 of the powertrain 15. The above arrangement can prevent the ratio of the length L3 of the shift mechanism 152 along the length of the frame 11 to the length L3 of the left footrest 271 along the length of the frame 11 from being too large. Thus, after the left footrest 271 is removed from the ATV 100, the shift mechanism 152 can be prevented from being obscured by the front fender 126 and / or the rear fender 12b. This facilitates full exposure of the shift mechanism 152 and improves the ease of maintenance of the shift mechanism 152. It can also prevent the ratio of the length L3 of the shift mechanism 152 along the length of the frame 11 to the length L5 of the left footrest 271 along the length of the frame 11 from being too small, thereby preventing partial redundancy of the left footrest 271, thereby improving the space utilization of the ATV 100 and making the ATV 100 more compact. The above arrangement facilitates maintenance of the shift mechanism 152 and improves the compactness of the ATV 100.

[0137] As an implementation method, the orthographic projection of the speed change mechanism 152 on the longitudinal center plane 10s is the speed change projection, and the orthographic projection of the left pedal 271 on the longitudinal center plane 10s is the right pedal projection. The overlapping portion of the speed change projection and the right pedal projection is the fourth overlapping projection, and the ratio of the area of ​​the fourth overlapping projection to the area of ​​the speed change projection ranges from 0.2 to 0.3. Specifically, the ratio of the area of ​​the fourth overlapping projection to the area of ​​the speed change projection ranges from 0.22 to 0.28. More specifically, the ratio of the area of ​​the fourth overlapping projection to the area of ​​the speed change projection is 0.25. The present application sets the ratio of the area of ​​the fourth overlapping projection to the area of ​​the speed change projection to the above range, so that after the left pedal 271 is removed from the all-terrain vehicle 100, the speed change mechanism 152 can be fully exposed, thereby facilitating the maintenance of the speed change mechanism 152.

[0138] As an implementation, the front fender 126 is provided with a front mounting portion 1264, which is located at the bottom of the front fender 126. The rear fender 12b is provided with a rear mounting portion 12ba, which is located at the bottom of the rear fender 12b. The footrest assembly 27 is detachably connected to the front mounting portion 1264, and the footrest assembly 27 is detachably connected to the rear mounting portion 12ba. After the footrest assembly 27 is removed from the front mounting portion 1264 of the front fender 126 and the rear mounting portion 12ba of the rear fender 12b, the footrest assembly 27 can be pulled outward along the width of the frame 11, enabling quick removal of the footrest assembly 27, thereby improving the maintenance efficiency of the powertrain 15.

[0139] Specifically, the vehicle frame 11 includes a main frame 113 and side support frames 114. The side support frames 114 are located on either side of the main frame 113 along the width of the vehicle frame 11. The side support frames 114 are fixedly connected to the main frame 113, and the footrest assembly 27 is mounted on the side support frames 114. This arrangement ensures that when the footrest assembly 27 is installed on the all-terrain vehicle 100, it is supported by the side support frames 114, thereby providing support for the driver or passenger's feet.

[0140] Specifically, an insertion hole 273 is defined on the upper side of the footrest assembly 27, and an insertion portion is provided on the side panel structure 12c. The insertion portion is located at the lower portion of the side panel structure 12c and is inserted into the insertion hole 273. This arrangement facilitates the removal of the footrest assembly 27 from the side panel structure 12c, thereby facilitating the removal of the footrest assembly 27 from the side panel structure 12c. This facilitates the removal of the footrest assembly 27 from the side panel structure 12c, thereby facilitating the removal of the footrest assembly 27 outward along the width of the vehicle frame 11, thereby enabling rapid removal of the footrest assembly 27 and improving the maintenance efficiency of the powertrain 15.

[0141] As shown in Figures 28 and 29, the cargo box assembly 21 includes a rear cargo box mounting plate 213, which is at least partially mounted on the rear fender 12b and can be used to mount a rear cargo box. Specifically, the all-terrain vehicle 100 also includes a trunk assembly 214, which is used to provide storage space at the rear of the all-terrain vehicle 100. The trunk assembly 214 is supported by the vehicle frame 11. The trunk assembly 214 has a trunk opening 2141 for placing and removing items, with the opening of the trunk opening 2141 facing upward. The rear cargo box mounting plate 213 is configured to cover the trunk opening 2141, allowing the rear cargo box mounting plate 213 to serve as a trunk cover for the trunk assembly 214. Through the above-mentioned arrangement, the rear cargo box mounting plate 213 can be used for installing the rear cargo box and can also serve as the trunk cover of the trunk assembly 214, so that there is no need to install an additional trunk cover on the trunk assembly 214, which is conducive to simplifying the structure of the trunk assembly 214, thereby helping to reduce the cost of the trunk assembly 214 and making the structure of the trunk assembly 214 more compact.

[0142] As an implementation, the trunk assembly 214 includes an upper trunk 2142 and a lower trunk 2143. The upper trunk 2142 is fixedly connected to the lower trunk 2143. The upper trunk 2142 is also fixedly connected to the rear fender 12b, while the lower trunk 2143 is fixedly connected to the vehicle frame 11. A trunk opening 2141 is formed in the upper trunk 2142. The orthographic projection of the trunk opening 2141 onto the reference plane 102 is smaller than the orthographic projection of the trunk assembly 214 onto the reference plane 102. In this application, the trunk opening 2141 is relatively small, while the interior of the trunk assembly 214 is configured to have a relatively large volume. Therefore, if the trunk assembly 214 is integrally molded, the trunk assembly 214 cannot be demolded from the trunk opening 2141. In this embodiment, the upper trunk 2142 and the lower trunk 2143 are separately arranged so that the trunk assembly 214 can be demolded, which is beneficial to increase the volume of the upper trunk 2142 and the lower trunk 2143, so that the trunk assembly 214 can have a larger volume while having a smaller trunk opening 2141, thereby improving the storage performance of the trunk assembly 214.

[0143] As an implementation, the front end of trunk opening 2141 is located behind the front end of trunk assembly 214. In this application, the space at the front end of trunk assembly 214 is larger than the space at the front end of trunk opening 2141. This arrangement allows trunk assembly 214 to fully utilize the space at the front end of trunk assembly 214, thereby increasing the volume of trunk assembly 214 and improving its storage function.

[0144] As an implementation, the cargo box assembly 21 further includes cargo box fasteners 2144, which are disposed through the rear cargo box mounting plate 213 and the rear fender 12b and are fixedly connected to the upper trunk 2142. In some embodiments, the cargo box fasteners 2144 may be bolts, which are disposed through the rear cargo box mounting plate 213 and the rear fender 12b and are fixedly connected to the upper trunk 2142, thereby improving the installation stability of the aforementioned components. Furthermore, this arrangement allows the rear cargo box mounting plate 213, the rear fender 12b, and the upper trunk 2142 to be installed using the same mounting point, thereby reducing the machining of the mounting points on the aforementioned components and simplifying the processing of the aforementioned components. Furthermore, the number of cargo box fasteners 2144 used to secure the aforementioned components can be reduced, thereby reducing costs.

[0145] As one implementation, the rear cargo box mounting plate 213 includes a mounting plate body 2131 and a cargo box middle cover 2132, which is detachably connected to the mounting plate body 2131. Specifically, the mounting plate body 2131 is mounted on the rear fender 12b, and the cargo box middle cover 2132 covers the trunk opening 2141. In some embodiments, the cargo box middle cover 2132 is snap-fitted to the mounting plate body 2131, facilitating removal of the cargo box middle cover 2132. This arrangement allows for easy removal of items from the trunk assembly 214 by simply removing the cargo box middle cover 2132, without having to completely disassemble the rear cargo box mounting plate 213. This facilitates easier access to the trunk assembly 214.

[0146] As one embodiment, the ATV 100 includes a muffler 28, which is used to reduce noise generated by the ATV 100. Specifically, the muffler 28 is mounted on the rear portion of the frame 11, with the trunk assembly 214 positioned above the muffler 28. In this embodiment, the muffler 28 generates heat during use, thereby heating the trunk assembly 214 above it. This helps to heat and insulate items within the trunk assembly 214, thereby improving the functionality of the trunk assembly 214.

[0147] As another implementation, the trunk assembly 214 also includes a heat shield 2145 for heat insulation. Specifically, along the height of the vehicle frame 11, the heat shield 214 is mounted below the lower trunk 2143 and between the lower trunk 2143 and the muffler 28. This arrangement prevents heat generated by the muffler 28 from being transferred into the trunk assembly 214, thereby reducing the temperature of the trunk assembly 214 and preventing the heat from the muffler 28 from affecting items within the trunk assembly 214.

[0148] As an implementation, the body panel 12 also includes a taillight mounting bracket 12d for mounting the rear taillight. Specifically, the taillight mounting bracket 12d is mounted on and behind the rear fender 12b, allowing the taillight mounting bracket 12d, the rear fender 12b, the rear cargo box mounting plate 213, and the trunk assembly 214 to be assembled and mounted to the vehicle frame 11. This arrangement allows the taillight mounting bracket 12d, the rear fender 12b, the rear cargo box mounting plate 213, and the trunk assembly 214 to be assembled together during assembly of the all-terrain vehicle 100. These components can then be assembled together to the vehicle frame 11. This arrangement avoids the problem of assembling these components individually to the vehicle frame 11, which could compromise the precision of the fit between the components. This improves the assembly accuracy of the all-terrain vehicle 100. In addition, the above components are assembled in combination in advance, and there is no need to assemble them with the frame 11 one by one, which can simplify the assembly process between the above components and the frame 11, thereby improving assembly efficiency.

[0149] As an implementation, the body cover 12 further includes decorative panels 12e mounted on either side of the rear fender 12b along the width of the vehicle frame 11. The decorative panels 12e are a different color than the rear fender 12b. This arrangement enhances the recognition of the ATV 100, facilitating the identification of the ATV 100's position and outline, thereby improving the safety of the ATV 100.

[0150] As an implementation, the volume of trunk assembly 214 ranges from 4L to 6L. Specifically, the volume of trunk assembly 214 ranges from 4.5L to 5.5L. More specifically, the volume of trunk assembly 214 is 4.9L. This configuration prevents the volume of trunk assembly 214 from being too large, which would otherwise interfere with the assembly of other components, thereby facilitating assembly of the all-terrain vehicle 100. Furthermore, it prevents the volume of trunk assembly 214 from being too small, which would otherwise result in insufficient storage space, thereby improving the storage capacity of trunk assembly 214.

[0151] As shown in Figures 30 and 31, the electrical assembly 22 includes a taillight wiring harness 224 for electrically connecting to the rear taillight 236. To prevent the taillight wiring harness 224 from wobbling and wearing during the operation of the ATV 100, the taillight mounting bracket 12d, previously disclosed, is provided with a first mounting rib structure 12da and a wiring harness securing structure 12db. The first mounting rib structure 12da is integrally formed with the taillight mounting bracket 12d, enhancing the structural strength of the taillight mounting bracket 12d. The wiring harness securing structure 12db engages with the first mounting rib structure 12da and is also connected to the taillight wiring harness 224. This secures the taillight wiring harness 224 to the taillight mounting bracket 12d via the wiring harness securing structure 12db and the first mounting rib structure 12da, preventing the taillight wiring harness 224 from wobbling during operation of the ATV 100.

[0152] Specifically, the first mounting rib structure 12da is basically a sheet-like structure, and the wiring harness fixing structure 12db includes a clamping portion 12dc and a sleeve portion 12dd connected to the clamping portion 12dc. The sleeve portion 12dd can be sleeved on the taillight wiring harness 224, and the clamping portion 12dc can be clamped with the first mounting rib structure 12da, thereby realizing the connection between the taillight wiring harness 224 and the taillight mounting frame 12d.

[0153] More specifically, the engaging portion 12dc defines a slot 12de, within which an elastic sheet 12df is mounted. When the engaging portion 12dc engages the first mounting rib structure 12da, the first mounting rib structure 12da is at least partially located within the slot 12de and abuts against the elastic sheet 12df. This elastic sheet 12df elastically deforms, exerting a pre-tightening force on the first mounting rib structure 12da, thereby further stabilizing the engagement between the engaging portion 12dc and the first mounting rib structure 12da. The sleeve portion 12dd can be a cable tie, with a slot defined in the engaging portion 12dc. One end of the cable tie passes through the slot and connects to the other end of the cable tie, enabling the sleeve portion 12dd to be sleeved onto the taillight wiring harness 224.

[0154] As shown in Figures 32 and 33, the running system 13 includes a wheel 131. Wheel 131 includes a rim 1311, a tire (not shown), and a mounting bracket 1312. The tire is mounted on the rim 1311, and the rim 1311 is mounted on the mounting bracket 1312. The suspension system 14 includes an axle support 141 that connects the mounting bracket 1312 to the frame 11. The transmission assembly 16 includes a transmission half-shaft 164 that is transmission-connected to the powertrain 15. The transmission half-shaft 164 includes a half-shaft ball cage 1641 that is transmission-connected to the rim 1311. Mounting bracket 1312 is at least partially formed with a raised portion 1312a. The transmission assembly 16 also includes a transmission bearing 165 that is sleeved on the raised portion 1312a. The raised portion 1312a is rotationally connected to the axle support 141 via the transmission bearing 165. Axle cage 1641 is at least partially inserted through raised portion 1312a and fixedly connected to mounting bracket 1312. This arrangement eliminates the need for coupling 1641 to drive bearing 165. This eliminates the need for machining a mating section on axle cage 1641 that connects to drive bearing 165. This reduces the size of axle cage 1641, further increasing its compactness and space utilization. Furthermore, since a mating section on axle cage 1641 that connects to drive bearing 165 is not required, machining axle cage 1641 simplifies its machining process and reduces production costs.

[0155] In this embodiment, a first plane 103 and a second plane 104 are defined, perpendicular to the width of the frame 11. The first plane 103 substantially bisects the wheel 131, and the second plane 104 substantially bisects the transmission bearing 165. The minimum distance D3 between the first plane 103 and the second plane 104 along the width of the frame 11 ranges from 0 to 10 mm. Specifically, the minimum distance D3 between the first plane 103 and the second plane 104 along the width of the frame 11 ranges from 2 mm to 8 mm. More specifically, the minimum distance D3 between the first plane 103 and the second plane 104 along the width of the frame 11 ranges from 4 mm to 6 mm. The minimum distance D3 between the first plane 103 and the second plane 104 along the width of the frame 11 is the bearing offset of the transmission bearing 165. This arrangement helps prevent excessive bearing offset of the transmission bearing 165, which could occur if the minimum distance D3 between the first plane 103 and the second plane 104 along the width of the frame 11 is too large. This prevents excessive torque on the transmission bearing 165 and helps improve the service life of the transmission bearing 165. Furthermore, reducing the bearing offset of the transmission bearing 165 helps reduce the size of the axle ball cage 1641, thereby improving the structural compactness of the axle ball cage 1641. Furthermore, reducing the size of the axle ball cage 1641 helps reduce its weight, making the all-terrain vehicle 100 even lighter.

[0156] In one embodiment, the axle support 141 defines a receiving hole 1411, with the raised portion 1312a at least partially located within the receiving hole 1411. The transmission bearing 165 includes an inner ring and an outer ring. The inner ring surrounds and engages with the raised portion 1312a, while the outer ring engages and secures with the inner wall of the receiving hole 1411. This arrangement allows the axle support 141 to be directly connected to the mounting bracket 1312 via the transmission bearing 165, eliminating the need for transmission through the axle shaft cage 1641. This eliminates the need for assembly of the axle shaft cage 1641 with the axle shaft support 141, simplifying the manufacturing process of the axle shaft cage 1641. Furthermore, this arrangement provides space for the transmission bearing 165 and the raised portion 1312a to be installed, further improving the structural compactness of the transmission bearing 165.

[0157] In one embodiment, the wheel axle support 141 defines a relief hole 1412 that communicates with the receiving hole 1411. The inner diameter of the relief hole 1412 gradually increases from closer to the receiving hole 1411 to farther away from the receiving hole 1411. The axle ball cage 1641 includes a cage portion 1641a, which is at least partially located within the relief hole 1412. This arrangement prevents interference between the cage portion 1641a and the wheel axle support 141, thereby facilitating rotation of the axle ball cage 1641. Furthermore, positioning the cage portion 1641a at least partially within the relief hole 1412 further enhances the structural compactness of the axle ball cage 1641 and the wheel axle support 141, thereby improving space utilization at the axle ball cage 1641.

[0158] As shown in Figure 34, the raised portion 1312a defines an internal splined hole 1312b, and the rim 1311 defines a mounting hole 1311a that communicates with the internal splined hole 1312b. The axes of the internal splined hole 1312b and the mounting hole 1311a substantially coincide with the axis of the rim 1311. Furthermore, the axle shaft cage 1641 includes an external splined portion 1641b and a fixing portion 1641c. The external splined portion 1641b is spline-connected to the internal splined hole 1312b, while the fixing portion 1641c passes through the mounting hole 1311a and is secured by a connector 1642. This arrangement enables the axle shaft cage 1641 to rotate the mounting bracket 1312 through the splined connection, thereby driving the wheel 131. Furthermore, the cooperation between the connector 1642 and the fixing portion 1641c improves the transmission stability of the axle shaft cage 1641 and the mounting bracket 1312.

[0159] As shown in Figure 32, when viewed along the length of the frame 11, the wheel axle support 141 substantially overlaps the tire. This arrangement allows the wheel axle support 141 to be positioned substantially within the tire, thereby improving the compactness of the tire structure and enhancing space utilization at the tire site. Furthermore, this arrangement allows the half-axle ball cage 1641 to be positioned closer to the mounting bracket 1312, further reducing the minimum distance D3 between the first plane 103 and the second plane 104 along the width of the frame 11. This in turn reduces the bearing offset of the transmission bearing 165, further reducing the torque applied to the transmission bearing 165 and thereby increasing its service life.

[0160] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims appended to this application.

[0161] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An all-terrain vehicle, comprising: A frame, the frame including an upper main beam, a lower main beam, and longitudinal beams connecting between the upper main beam and the lower main beam; A body covering, the body covering being supported by at least one of the upper main beam, the lower main beam, and the longitudinal beams; A suspension system, the suspension system being supported by the lower main beam; A running system, the running system being connected to the frame at least partially through the suspension system, the running system including a left front wheel and a right front wheel; An engine, the engine being used to drive the running system, the engine including a left cylinder, a right cylinder, a left cylinder head provided on the left cylinder, and a right cylinder head provided on the right cylinder; Characterized in that, The left cylinder head and the right cylinder head face the rear end of the all-terrain vehicle; a longitudinal center plane perpendicular to the width direction of the frame is defined, and the longitudinal center plane passes through the midpoint of the distance between the left front wheel and the right front wheel; the central axis of the left cylinder is the left cylinder axis, the central axis of the right cylinder is the right cylinder axis, the horizontal distance from the left cylinder axis to the longitudinal center plane is a first distance, and the horizontal distance from the right cylinder axis to the longitudinal center plane is a second distance; The upper main beam includes a left upper main beam and a right upper main beam, the left upper main beam and the right upper main beam each extend along the length direction of the all-terrain vehicle, a straddle width is defined between the left upper main beam and the right upper main beam, and the straddle width is defined as a third distance; at the longitudinal position closest to the left cylinder axis and the right cylinder axis, there is a top width between the left upper main beam and the right upper main beam, and the top width is defined as a fourth distance; the fourth distance is greater than the third distance, the first distance or the second distance is less than half of the third distance, and the sum of the first distance and the second distance is less than the fourth distance.

2. The all-terrain vehicle according to claim 1, characterized in that, The first distance is less than half of the fourth distance.

3. The all-terrain vehicle according to claim 1, characterized in that, The ratio range between the first distance and the second distance is from 0.4 to 0.

6.

4. The all-terrain vehicle according to claim 1, characterized in that, The vertical distance between the leftmost side of the left cylinder head and the longitudinal center plane is defined as a fifth distance, the vertical distance between the rightmost side of the right cylinder head and the longitudinal center plane is defined as a sixth distance, and the ratio range between the fifth distance and the sixth distance is from 0.2 to 1.

8.

5. The all-terrain vehicle according to claim 4, characterized in that, The ratio range between the fifth distance and the sixth distance is from 0.5 to 1.

5.

6. The all-terrain vehicle according to claim 4, characterized in that, The ratio range between the fifth distance and the sixth distance is from 0.8 to 1.

2.

7. The all-terrain vehicle according to claim 1, characterized in that, A reference plane perpendicular to the height direction of the frame is defined, and the angular range of the angle formed by the cylinder projection line and the reference plane is from 45° to 65°.

8. The all-terrain vehicle according to claim 1, characterized in that the all-terrain vehicle further includes a footrest assembly, and the footrest assembly includes a left footrest serration and a right footrest serration; the all-terrain vehicle includes a magneto and a driving wheel, the magneto is arranged on one side of the engine, and the driving wheel is arranged on the other side of the engine; a plane perpendicular to the height direction of the vehicle frame and passing through the contact point of the running system with the ground is defined as a reference plane; the positive projection of the left footrest serration on the reference plane is the left footrest serration projection, and the positive projection of the right footrest serration on the reference plane is the right footrest serration projection. Along the length direction of the vehicle frame, the distance range between the rightmost side of the left footrest serration projection and the rotation center of the driving wheel is 0 to 420 mm; the distance range between the leftmost side of the right footrest serration projection and the rotation center of the magneto is 0 mm to 420 mm.

9. The all-terrain vehicle according to claim 8, characterized in that along the length direction of the vehicle frame, the distance range between the rightmost side of the left footrest serration projection and the rotation center of the driving wheel is 40 to 380 mm; the distance range between the leftmost side of the right footrest serration and the rotation center of the magneto is 40 to 380 mm.

10. The all-terrain vehicle according to claim 1, characterized in that the distance between the leftmost side of the engine and the longitudinal center plane is defined as the seventh distance, and the distance between the rightmost side of the engine and the longitudinal center plane is defined as the eighth distance; the ratio range of the seventh distance to the eighth distance is 0.6 to 1.

3.

11. The all-terrain vehicle according to claim 1, characterized in that the all-terrain vehicle further includes a seat assembly supported by the vehicle frame; the body covering also includes a storage box assembly, a front fender, a first covering side cover and a second covering side cover. The storage box assembly, the first covering side cover and the second covering side cover are all at least partially supported by the vehicle frame. Along the length direction of the vehicle frame, the storage box assembly, the first covering side cover and the second covering side cover are all at least partially located between the front fender and the seat assembly. The first covering side cover and the second covering side cover are distributed on both sides of the storage box assembly along the width direction of the all-terrain vehicle. A first space is formed by surrounding the first covering side cover and the front fender, and a second space is formed by surrounding the second covering side cover and the front fender. The storage box assembly is at least partially located in the first space and / or the second space, and the volume range of the storage box assembly is 6 L to 10 L.

12. The all-terrain vehicle according to claim 11, characterized in that the all-terrain vehicle further includes an air filter mechanism, a speed change mechanism, an air filter intake pipe connecting the air filter mechanism, and a speed change intake pipe connecting the speed change mechanism. When observed from the height direction of the vehicle frame, the storage box assembly at least partially overlaps with the air filter intake pipe, and the storage box assembly at least partially overlaps with the speed change intake pipe; The air filter intake pipe and the transmission intake pipe are both at least partially located below the storage box assembly.

13. The all-terrain vehicle according to claim 11, wherein the storage box assembly includes an upper box body and a lower box body fixedly connected to the upper box body. The upper box body is provided with a storage opening. The upper box body and the lower box body are both at least partially located in the first space and / or the second space. When viewed from the height direction of the vehicle frame, the storage opening does not overlap with the first space, and the storage opening does not overlap with the second space.

14. The all-terrain vehicle according to claim 13, wherein the storage box assembly includes a storage cover, the storage cover is rotatably connected to the upper box body, and the storage cover is configured to be able to cover the storage opening; one side of the storage cover has a rotating shaft and an extension part substantially in a "U" shape. The rotating shaft is located at one end of the extension part away from the storage cover, and the rotating shaft is rotatably connected to the upper box body; the side of the storage cover away from the extension part has a cover body connecting part. At least part of the lower box body extends upward to form a fixing boss. The fixing boss is located at the rear part of the lower box body. The cover body connecting part can pass through the fixing boss and be clamped with the fixing boss.

15. The all-terrain vehicle according to claim 14, wherein a limiting part is arranged on the extension part, and the limiting part is configured to be able to limit the rotation angle of the storage cover relative to the upper box body; when the storage cover covers the storage opening, both sides of the storage cover along the width direction of the all-terrain vehicle can respectively fit the first covering side cover and the second covering side cover.

16. The all-terrain vehicle according to claim 12, wherein the storage box assembly is at least partially located in the first space. The all-terrain vehicle further includes a shifting assembly. The shifting assembly is at least partially located in the second space. The shifting assembly is connected to the second covering side cover; the shifting assembly is configured as an electronic shifter.

17. The all-terrain vehicle according to claim 11, wherein the body covering includes a front fender and a rear fender. The body covering further includes a side baffle structure located between the front fender and the rear fender. The side baffle structure is detachably connected to the front fender, and the side baffle structure is also detachably connected to the rear fender. Along the width direction of the vehicle frame, the all-terrain vehicle further includes a power assembly. The side baffle structure at least partially overlaps with the power assembly. The ratio range of the length of the power assembly along the length direction of the vehicle frame to the length of the side baffle structure along the length direction of the vehicle frame is from 1 to 1.

38.

18. The all-terrain vehicle according to claim 17, wherein The orthographic projection of the powertrain on the longitudinal central plane is the assembly projection, the orthographic projection of the side baffle structure on the longitudinal central plane is the first baffle projection, the overlapping part of the assembly projection and the first baffle projection is the first overlapping projection, and the ratio range of the area of the first overlapping projection to the area of the assembly projection is from 0.28 to 0.

43.

19. The all-terrain vehicle according to claim 17, wherein the side baffle structure includes a first side baffle and a second side baffle that are distributed along the width direction of the all-terrain vehicle and have substantially the same structure. The first side baffle and the second side baffle are respectively detachably connected to both sides of the front fender, and the first side baffle and the second side baffle are also respectively detachably connected to both sides of the rear fender; the powertrain includes a transmission mechanism and an engine. The first side baffle is disposed close to the transmission mechanism, and the second side baffle is disposed close to the engine.

20. The all-terrain vehicle according to claim 19, wherein the ratio range of the length of the transmission mechanism in the length direction of the frame to the length of the first side baffle in the length direction of the frame is from 0.75 to 1.

14.

21. The all-terrain vehicle according to claim 19, wherein the orthographic projection of the transmission mechanism on the longitudinal central plane is the transmission projection, the orthographic projection of the first side baffle on the longitudinal central plane is the second baffle projection, the overlapping part of the transmission projection and the second baffle projection is the second overlapping projection, and the ratio range of the area of the second overlapping projection to the area of the transmission projection is from 0.41 to 0.

62.

22. The all-terrain vehicle according to claim 11, wherein the body covering includes a front fender, a rear fender, and a footrest assembly located between the front fender and the rear fender; the footrest assembly is detachably connected to the front fender, the footrest assembly is also detachably connected to the rear fender, the footrest assembly is configured to be disassembled and assembled along the width direction of the all-terrain vehicle. Along the width direction of the frame, the all-terrain vehicle further includes a powertrain, and the footrest assembly at least partially overlaps with the powertrain. The ratio range of the length of the powertrain in the length direction of the frame to the length of the footrest assembly in the length direction of the frame is from 1 to 1.

4.

23. The all-terrain vehicle according to claim 22, wherein the orthographic projection of the powertrain on the longitudinal central plane is the assembly projection, the orthographic projection of the footrest assembly on the longitudinal central plane is the first footrest projection, the overlapping part of the assembly projection and the first footrest projection is the third overlapping projection, and the ratio range of the area of the third overlapping projection to the area of the assembly projection is from 0.17 to 0.

27.

24. The all-terrain vehicle according to claim 23, wherein The powertrain includes a transmission mechanism, and the pedal assembly includes a left pedal and a right pedal. The ratio of the length of the transmission mechanism in the longitudinal direction of the frame to the length of the left pedal in the longitudinal direction of the frame ranges from 0.76 to 1.

16.

25. An all-terrain vehicle, comprising: A frame, which includes an upper main beam, a lower main beam, and longitudinal beams connecting between the upper main beam and the lower main beam; A body covering, which is supported by at least one of the upper main beam, the lower main beam, and the longitudinal beams; A running system, which is at least partially located below the frame and includes a left front wheel, a right front wheel, and a rear wheel; A suspension system, which connects the rear wheel to the frame; An engine, which is drivingly connected to the rear wheel. The engine includes a left cylinder, a right cylinder, a left cylinder head disposed on the left cylinder, and a right cylinder head disposed on the right cylinder; the engine further includes an exhaust passage, which is connected to the left cylinder and the right cylinder; An exhaust assembly, which includes an exhaust pipe connected to the exhaust passage and a muffler connected to the exhaust pipe; A continuously variable transmission mechanism, which includes a driving pulley and a driven pulley, and the driving pulley is drivingly connected to the driven pulley; Characterized in that The left cylinder head and the right cylinder head face the rear end of the all-terrain vehicle; a plane perpendicular to the width direction of the frame is defined as the longitudinal central plane, and the longitudinal central plane passes through the midpoint of the distance between the left front wheel and the right front wheel; the central axis of the left cylinder is the left cylinder axis, the central axis of the right cylinder is the right cylinder axis, the horizontal distance from the left cylinder axis to the longitudinal central plane is the first distance, and the horizontal distance from the right cylinder axis to the longitudinal central plane is the second distance; The upper main beam includes a left upper main beam and a right upper main beam, and the left upper main beam and the right upper main beam each extend along the length direction of the all-terrain vehicle. A straddle width is defined between the left upper main beam and the right upper main beam, and the straddle width is defined as the third distance; at the longitudinal position closest to the left cylinder axis and the right cylinder axis, there is a top width between the left upper main beam and the right upper main beam, and the top width is defined as the fourth distance; the fourth distance is greater than the third distance, the first distance or the second distance is less than half of the third distance, and the sum of the first distance and the second distance is less than the fourth distance; The driving pulley is located behind the driven pulley. The connection line between the orthographic projection of the axis center of the driving pulley on the longitudinal central plane and the orthographic projection of the axis center of the driven pulley on the longitudinal central plane is the transmission projection line. The cylinder has a cylinder axis, and the orthographic projection of the cylinder axis on the longitudinal central plane is the cylinder projection line. The included angle between the cylinder projection line and the transmission projection line opens towards the rear of the all-terrain vehicle, and the range of the included angle is from 35° to 75°.

26. The all-terrain vehicle according to claim 25, characterized in that The first distance is less than half of the fourth distance.

27. The all-terrain vehicle according to claim 25, wherein the ratio range between the first distance and the second distance is from 0.4 to 0.

6.

28. The all-terrain vehicle according to claim 25, wherein the vertical distance between the leftmost side of the left cylinder head and the longitudinal central plane is defined as the fifth distance, and the vertical distance between the rightmost side of the right cylinder head and the longitudinal central plane is defined as the sixth distance. The ratio range between the fifth distance and the sixth distance is from 0.2 to 1.

8.

29. The all-terrain vehicle according to claim 28, wherein the ratio range between the fifth distance and the sixth distance is from 0.5 to 1.

5.

30. The all-terrain vehicle according to claim 28, wherein the ratio range between the fifth distance and the sixth distance is from 0.8 to 1.

2.

31. The all-terrain vehicle according to claim 25, wherein the included angle range between the cylinder projection line and the transmission projection line is from 40° to 70°.

32. The all-terrain vehicle according to claim 25, wherein the all-terrain vehicle further includes a footrest assembly, and the footrest assembly includes a left footrest serration and a right footrest serration; the all-terrain vehicle includes a magneto and a driving wheel. The magneto is disposed on one side of the all-terrain vehicle, and the driving wheel is disposed on the other side of the engine. A plane perpendicular to the height direction of the frame and passing through the contact point of the running system with the ground is defined as a reference plane; the front projection of the left footrest serration on the reference plane is the left footrest serration projection, and the front projection of the right footrest serration on the reference plane is the right footrest serration projection. Along the length direction of the frame, the distance range between the rightmost side of the left footrest serration projection and the rotation center of the driving wheel is from 0 to 420 mm; the distance range between the leftmost side of the right footrest serration projection and the rotation center of the magneto is from 0 mm to 420 mm.

33. The all-terrain vehicle according to claim 32, wherein along the length direction of the frame, the distance range between the rightmost side of the left footrest serration projection and the rotation center of the driving wheel is from 40 mm to 380 mm; the distance range between the leftmost side of the right footrest serration and the rotation center of the magneto is from 40 mm to 380 mm.

34. The all-terrain vehicle according to claim 25, wherein the distance between the leftmost side of the engine and the longitudinal central plane is defined as the seventh distance, and the distance between the rightmost side of the engine and the longitudinal central plane is defined as the eighth distance. The ratio range between the seventh distance and the eighth distance is from 0.6 to 1.

3.

35. The all-terrain vehicle according to claim 25, wherein The opening of the exhaust passage faces the rear of the all-terrain vehicle, and the rearmost end of the continuously variable transmission mechanism is located in front of the rearmost end of the exhaust passage; a reference plane perpendicular to the height direction of the vehicle frame is defined, and the positive projection of the opening of the exhaust passage on the reference plane is the exhaust projection, and the positive projection of the axis of the rear wheel on the reference plane is the rear axle projection line. The range of the minimum distance between the exhaust projection and the rear axle projection line is 250 mm to 400 mm.

36. The all-terrain vehicle according to claim 25, wherein the exhaust pipe extends rearward along the length direction of the vehicle frame, and the exhaust pipe is substantially divided along the longitudinal central plane.

37. The all-terrain vehicle according to claim 25, wherein the vehicle frame includes an upper main beam, and the upper main beam includes a left upper main beam and a right upper main beam distributed along the width direction of the all-terrain vehicle. When observed along the height direction of the all-terrain vehicle, the exhaust pipe is arranged between the left upper main beam and the right upper main beam.

38. The all-terrain vehicle according to claim 25, wherein the suspension system includes a rear swing arm and a shock absorber. The rear swing arm connects the rear wheel to the vehicle frame, and two ends of the shock absorber are respectively connected to the rear swing arm and the vehicle frame. When observed from the width direction of the all-terrain vehicle, the shock absorber at least partially overlaps with the exhaust pipe.

39. The all-terrain vehicle according to claim 25, wherein the all-terrain vehicle includes a fuel tank for supplying energy to the engine, the body covering includes a front fender, and the running system further includes a front wheel. A first plane perpendicular to the length direction of the all-terrain vehicle and passing through the rotation axis of the front wheel is defined, and a second plane perpendicular to the height direction of the all-terrain vehicle and passing through the rotation axis of the front wheel is defined. The fuel tank is located behind the first plane and at least partially in front of the engine, and the fuel tank is located above the second plane and at least partially below the front fender.

40. The all-terrain vehicle according to claim 39, wherein the minimum distance between the fuel tank and the first plane along the length direction of the all-terrain vehicle is a first distance, the distance between the rotation axis of the front wheel and the rotation axis of the rear wheel along the length direction of the all-terrain vehicle is the wheelbase, and the ratio range of the first distance to the wheelbase is 0.1 to 0.

16.

41. The all-terrain vehicle according to claim 25, wherein the exhaust pipe includes a corrugated pipe and a rigid pipe. Both ends of the corrugated pipe are connected with the rigid pipes, and the rigid pipes are respectively connected with the exhaust passage and the muffler; the length range of the corrugated pipe is 100 mm to 200 mm.

42. The all-terrain vehicle according to claim 25, wherein along the width direction of the vehicle frame, the ratio range of the maximum width occupied by the cylinder head to the maximum width occupied by the cylinder is 0.63 to 0.

9.

43. The all-terrain vehicle according to claim 25, wherein A plane perpendicular to the height direction of the frame and passing through the contact point between the walking system and the ground is defined as a reference plane, and the acute angle formed by the cylinder projection line and the reference plane ranges from 45° to 65°.

44. The all-terrain vehicle of claim 25, wherein: The all-terrain vehicle also includes a seat assembly and an electrical assembly, wherein the seat assembly is supported by the frame, the electrical assembly includes an electronic control unit for controlling a powertrain, the seat assembly includes a seat cushion detachably connected to the frame, the seat cushion is located above the powertrain, the electronic control unit is located between the seat cushion and the powertrain, and when viewed from the height direction of the frame, the seat cushion and the electronic control unit at least partially overlap.

45. The all-terrain vehicle of claim 44, wherein: The power assembly includes an engine and an air filter mechanism for supplying air to the engine. The air filter mechanism is connected to the engine and is located between the power assembly and the seat assembly. The electronic control unit is located above the air filter mechanism.

46. The all-terrain vehicle of claim 45, wherein: The engine comprises an engine body and a cylinder head connected to the engine body, the air filter mechanism is at least partially located above the engine body, and the air filter mechanism is located in front of the cylinder head.

47. The all-terrain vehicle of claim 46, wherein: The cylinder has a cylinder axis, and the orthographic projection of the cylinder axis on the longitudinal center plane is a cylinder projection line, defining a reference plane perpendicular to the height direction of the frame. The angle formed by the cylinder projection line and the reference plane ranges from 50° to 60°, and the opening of the angle is set toward the rear of the all-terrain vehicle.

48. The all-terrain vehicle of claim 45, wherein: The all-terrain vehicle further includes a transmission mechanism, wherein the transmission mechanism and the engine are distributed along the width direction of the frame. The speed change mechanism is drivingly connected to the engine, and the electronic control unit is at least partially located above the engine and at least partially located above the speed change mechanism.

49. The all-terrain vehicle of claim 25, wherein: The all-terrain vehicle further includes and electrical component, the electrical component is at least partially disposed on the body cover or the frame, the electrical component includes a body controller and a dashboard; The body covering includes an instrument mounting cover, the instrument panel and the body controller are both mounted on the instrument mounting cover, the body controller is located below the instrument panel, and defines a reference plane perpendicular to the height direction of the frame and passing through the lowermost end of the walking system, and the minimum distance between the body controller and the reference plane along the height direction of the frame ranges from 850mm to 1270mm.

50. The all-terrain vehicle of claim 49, wherein: The minimum distance between the vehicle body controller and the reference plane along the height direction of the vehicle frame ranges from 950 mm to 1170 mm.

51. The all-terrain vehicle according to claim 49, wherein the instrument mounting cover includes an instrument front cover and an instrument surface cover, at least a part of the instrument front cover is located in front of the instrument surface cover, the instrument surface cover is located on the instrument front cover and connected to the instrument front cover, and the instrument panel is mounted on the instrument surface cover; an accommodation space is formed after the instrument surface cover and the instrument front cover are connected, and the vehicle body controller is located in the accommodation space.

52. The all-terrain vehicle according to claim 51, wherein the vehicle frame includes a support frame, the support frame is located in the accommodation space, the support frame connects the instrument front cover and the instrument surface cover, the support frame is configured to be able to provide support for the instrument front cover and the instrument surface cover, and the vehicle body controller is mounted on the support frame.

53. The all-terrain vehicle according to claim 52, wherein the support frame includes a front cross bar, a rear cross bar, a left longitudinal bar and a right longitudinal bar. Two ends of the left longitudinal bar are respectively connected to one end of the front cross bar and one end of the rear cross bar, two ends of the right longitudinal bar are respectively connected to the other end of the front cross bar and the other end of the rear cross bar, both ends of the front cross bar are connected to the instrument front cover, and the rear ends of the left longitudinal bar and the right longitudinal bar are both connected to the instrument surface cover.

54. The all-terrain vehicle according to claim 53, wherein the vehicle body controller is mounted on the front cross bar and the rear cross bar, and the vehicle body controller is also mounted on at least one of the left longitudinal bar and the right longitudinal bar.

55. The all-terrain vehicle according to claim 51, wherein the instrument surface cover is provided with a hook structure and a first insertion structure, both the hook structure and the first insertion structure are located at the front part of the instrument surface cover, the instrument front cover is provided with an insertion slot and a clamping part, the insertion slot is configured to be able to be inserted with the first insertion structure, the first insertion structure abuts against the bottom of the insertion slot, and the clamping part is configured to be able to be clamped with the hook structure.

56. The all-terrain vehicle according to claim 55, wherein at least a part of the instrument front cover also surrounds both sides of the instrument surface cover along the width direction of the all-terrain vehicle, and both sides of the instrument surface cover along the width direction of the all-terrain vehicle are fixedly connected to the instrument front cover.

57. The all-terrain vehicle according to claim 51, wherein the vehicle body covering member further includes a storage box assembly, at least a part of the storage box assembly is supported by the vehicle frame, at least a part of the storage box assembly is located behind the instrument surface cover, and the instrument surface cover is clamped with the storage box assembly.

58. The all-terrain vehicle according to claim 51, wherein The vehicle body covering also includes a front fender, the instrument front cover is mounted on the front fender, the instrument front cover is provided with a second plugging structure and a clamping structure, the second plugging structure is located at the front part of the instrument front cover, the clamping structure is located on both sides of the instrument front cover along the width direction of the all-terrain vehicle, the front fender is provided with a plugging port and a clamping port, the plugging port is configured to be able to be plugged with the second plugging structure, and the clamping port is configured to be able to be clamped with the clamping structure.

59. The all-terrain vehicle according to claim 25, wherein the vehicle body covering also includes a front fender, the all-terrain vehicle further includes an electrical component assembly, at least a part of the electrical component assembly is arranged on the vehicle body covering or the vehicle frame; the vehicle body covering includes an electrical installation plate, the electrical installation plate is supported by the vehicle frame and is configured to be able to carry at least a part of the electrical component assembly, the electrical installation plate is located below the front fender, the electrical installation plate is provided with a hook structure and a fixing part, the hook structure is clamped with the vehicle frame, and the fixing part is fixedly connected with the vehicle frame.

60. The all-terrain vehicle according to claim 59, wherein the hook structure includes a hook body and a hook part, the hook body and the hook part are integrally formed, an opening is formed between the hook part and the electrical installation plate, the vehicle frame passes through the opening and is clamped with the hook structure, a guiding part is formed at a position close to the opening of the hook part, and the bending direction of the guiding part is opposite to the bending direction of the hook part.

61. The all-terrain vehicle according to claim 59, wherein the electrical component assembly includes a connection wire harness, there are a plurality of the hook structures, gaps exist between the plurality of the hook structures, and the gaps are configured to be able to avoid the connection wire harness.

62. The all-terrain vehicle according to claim 59, wherein the hook structure is formed with an avoidance part, and the avoidance part is configured to be able to avoid the front fender so that there is an assembly interval between the front fender and the avoidance part.

63. The all-terrain vehicle according to claim 59, wherein the electrical installation plate is provided with a first arrangement area and a second arrangement area, the first arrangement area is located in front of the second arrangement area, the electrical component assembly includes an electrical component and a connection wire harness, the electrical component is located in the first arrangement area, and the connection wire harness is located in the second arrangement area; The first layout area includes a first area, a second area, a third area, and a fourth area. The first area is located in front of the second area. The third area and the fourth area are distributed on both sides of the first area and the second area along the width direction of the vehicle frame. The electrical components include a storage battery, a vehicle-mounted communication module, a vehicle diagnostic module, a keyless start module, and a fuse box. The all-terrain vehicle includes an oil cup and a radiator pipeline. The vehicle-mounted communication module, the vehicle diagnostic module, and the keyless start module are all located in the first area. The storage battery is installed in the second area. The fuse box is located in the third area. The oil cup is installed in the fourth area. The radiator pipeline passes through the fourth area.

64. An all-terrain vehicle, comprising: A vehicle frame, which includes an upper main beam, a lower main beam, and a connecting support longitudinal beam connected between the upper main beam and the lower main beam; A body covering, which is supported by at least one of the upper main beam, the lower main beam, and the longitudinal beam; A suspension system, which is supported by the lower main beam; A running system, which is connected to the vehicle frame through the suspension system, and the running system includes a left front wheel and a right front wheel; An engine, which is used to drive the running system, and the engine includes a left cylinder, a right cylinder, a left cylinder head provided on the left cylinder, and a right cylinder head provided on the right cylinder; Characterized in that The left cylinder head and the right cylinder head face the rear end of the all-terrain vehicle; a plane perpendicular to the width direction of the vehicle frame is defined as a longitudinal center plane, and the longitudinal center plane passes through the midpoint of the distance between the left front wheel and the right front wheel; the central axis of the left cylinder is the left cylinder axis, the central axis of the right cylinder is the right cylinder axis, the horizontal distance from the left cylinder axis to the longitudinal center plane is a first distance, and the horizontal distance from the right cylinder axis to the longitudinal center plane is a second distance; The upper main beam includes a left upper main beam and a right upper main beam, and the left upper main beam and the right upper main beam each extend along the length direction of the all-terrain vehicle. A straddle width is defined between the left upper main beam and the right upper main beam, and the straddle width is defined as a third distance; at the longitudinal position closest to the left cylinder axis and the right cylinder axis, a top width is defined between the left upper main beam and the right upper main beam, and the top width is defined as a fourth distance; the fourth distance is greater than the third distance, the first distance or the second distance is less than half of the third distance, and the sum of the first distance and the second distance is less than the fourth distance; The engine includes a cylinder, two cylinder heads arranged side by side on the cylinder, and a cylinder head cover mounted on the cylinder heads; the cylinder heads are arranged towards the rear end of the all-terrain vehicle; a plane perpendicular to the height direction of the frame and passing through the contact point of the running gear with the ground is defined as a reference plane, and the orthographic projection of the cylinder head cover on the reference plane is defined as the cylinder head cover projection area; the area surrounded by the orthographic projection of the upper main beam on the reference plane along the height direction of the frame is defined as the upper main beam projection closed area; the part of the cylinder head cover projection area that falls within the upper main beam projection closed area is defined as the closed area projection, and the ratio of the area of the closed area projection to the area of the cylinder head cover projection area ranges from 0.6 to 0.

9.

65. The all-terrain vehicle according to claim 64, wherein the first distance is less than half of the fourth distance.

66. The all-terrain vehicle according to claim 64, wherein the ratio between the first distance and the second distance ranges from 0.4 to 0.

6.

67. The all-terrain vehicle according to claim 64, wherein the perpendicular distance between the leftmost side of the left cylinder head and the longitudinal center plane is defined as the fifth distance, the perpendicular distance between the rightmost side of the right cylinder head and the longitudinal center plane is defined as the sixth distance, and the ratio between the fifth distance and the sixth distance ranges from 0.2 to 1.

8.

68. The all-terrain vehicle according to claim 67, wherein the ratio between the fifth distance and the sixth distance ranges from 0.5 to 1.

5.

69. The all-terrain vehicle according to claim 67, wherein the ratio between the fifth distance and the sixth distance ranges from 0.8 to 1.

2.

70. The all-terrain vehicle according to claim 64, wherein a reference plane perpendicular to the height direction of the frame is defined, and the angle range formed by the cylinder projection line and the reference plane is from 45° to 65°.

71. The all-terrain vehicle according to claim 64, wherein the all-terrain vehicle further includes a footrest assembly, and the footrest assembly includes a left footrest serration and a right footrest serration; the all-terrain vehicle includes a magneto and a driving wheel, the magneto is arranged on one side of the engine, and the driving wheel is arranged on the other side of the engine; a plane perpendicular to the height direction of the frame and passing through the contact point of the running gear with the ground is defined as a reference plane; the orthographic projection of the left footrest serration on the reference plane is the left footrest serration projection, and the orthographic projection of the right footrest serration on the reference plane is the right footrest serration projection. Along the length direction of the frame, the distance range between the rightmost side of the left footrest serration projection and the rotation center of the driving wheel is from 0 to 420 mm; the distance range between the leftmost side of the right footrest serration projection and the rotation center of the magneto is from 0 mm to 420 mm.

72. The all-terrain vehicle according to claim 71, wherein Along the length direction of the vehicle frame, the distance range between the rightmost side of the left footrest sawtooth projection and the rotation center of the driving wheel is 40 mm to 380 mm; the distance range between the leftmost side of the right footrest sawtooth and the rotation center of the magneto is 40 mm to 380 mm.

73. The all-terrain vehicle according to claim 64, wherein the distance between the leftmost side of the engine and the longitudinal center plane is defined as the seventh distance, and the distance between the rightmost side of the engine and the longitudinal center plane is defined as the eighth distance; the ratio range of the seventh distance to the eighth distance is 0.6 to 1.

3.

74. The all-terrain vehicle according to claim 64, wherein the ratio range of the area of the closed area projection to the area of the cylinder head projection area is 0.7 to 0.

85.

75. The all-terrain vehicle according to claim 64, wherein the ratio range of the area of the closed area projection to the area of the cylinder head projection area is 0.75 to 0.

8.

76. The all-terrain vehicle according to claim 64, wherein along the height direction of the vehicle frame, the distance range between the uppermost end of the cylinder head and the lowermost end of the upper main beam is 10 mm to 50 mm.

77. The all-terrain vehicle according to claim 64, wherein along the height direction of the vehicle frame, the distance range between the uppermost end of the cylinder head and the lowermost end of the upper main beam is 20 mm to 40 mm.

78. The all-terrain vehicle according to claim 64, wherein along the height direction of the vehicle frame, the distance range between the uppermost end of the cylinder head and the lowermost end of the upper main beam is 25 mm to 35 mm.

79. The all-terrain vehicle according to claim 64, wherein along the width direction of the vehicle frame, there is a preset gap between the left cylinder head and the right cylinder head, and the range of the preset gap is 6 mm to 12 mm.

80. The all-terrain vehicle according to claim 79, wherein along the width direction of the vehicle frame, there is a preset gap between the left cylinder head and the right cylinder head, and the range of the preset gap is 8 mm to 10 mm.

81. The all-terrain vehicle according to claim 64, wherein the all-terrain vehicle further includes a steering assembly, the steering assembly is arranged on the vehicle frame and located at the front side of the all-terrain vehicle; the engine further includes an intake assembly and an air intake port, the air intake port is arranged on the housing of the engine and connected to the intake assembly, and the air intake port is arranged between the steering assembly and the cylinder head.

82. The all-terrain vehicle according to claim 81, wherein the orthographic projection of the vehicle frame on the reference plane is the vehicle frame projection, the orthographic projection of the air intake port in the reference plane is the air intake port projection, and the air intake port projection is arranged in an area outside the vehicle frame projection.

83. The all-terrain vehicle according to claim 64, wherein The vehicle body covering includes a rear fender. The all-terrain vehicle further includes a cargo box assembly and a tail box assembly. The cargo box assembly includes a rear cargo box mounting plate, and at least a part of the rear cargo box mounting plate is mounted on the rear fender. The tail box assembly is supported by the vehicle frame. The tail box assembly has a tail box opening for placing and taking items, and the opening of the tail box opening faces upward. The rear cargo box mounting plate is configured to be able to cover the tail box opening so that the rear cargo box mounting plate can serve as the tail box cover of the tail box assembly.

84. The all-terrain vehicle according to claim 83, wherein the tail box assembly includes an upper tail box and a lower tail box. The upper tail box is fixedly connected to the lower tail box. The upper tail box is also fixedly connected to the rear fender. The lower tail box is fixedly connected to the vehicle frame. The tail box opening is formed in the upper tail box. The area of the orthographic projection of the tail box opening on the reference plane is smaller than the area of the orthographic projection of the tail box assembly on the reference plane.

85. The all-terrain vehicle according to claim 83, wherein the rear cargo box mounting plate includes a mounting plate main body and a cargo box middle cover detachably connected to the mounting plate main body. The mounting plate main body is mounted on the rear fender, and the cargo box middle cover covers the tail box opening.

86. The all-terrain vehicle according to claim 64, wherein the vehicle body covering includes a taillight mounting bracket. The all-terrain vehicle further includes an electrical component assembly. The electrical component assembly includes a rear taillight mounted on the taillight mounting bracket and a taillight wire harness electrically connected to the rear taillight. The taillight mounting bracket is provided with a first mounting rib structure and a wire harness fixing structure. The wire harness fixing structure is clamped with the first mounting rib structure. The wire harness fixing structure is also connected to the taillight wire harness. The first mounting rib structure is substantially in a sheet-like structure. The wire harness fixing mechanism includes a clamping portion, and the clamping portion is clamped with the first mounting rib structure.

87. The all-terrain vehicle according to claim 86, wherein the wire harness fixing structure includes a sleeving portion connected to the clamping portion, and the sleeving portion sleeves the taillight wire harness. The clamping portion is provided with a card slot, and an elastic piece is installed in the card slot. When the clamping portion is clamped with the first mounting rib structure, at least a part of the first mounting rib structure is located in the card slot and abuts against the elastic piece. The elastic piece has a pre-tightening force on the first mounting rib structure. The sleeving portion is a tie strap, and a slot hole is formed in the clamping portion. One end of the tie strap passes through the slot hole and is connected to the other end of the tie strap.

88. The all-terrain vehicle according to claim 64, wherein The walking system includes wheels, and each wheel includes a rim, a tire, and a mounting bracket. The tire is mounted on the rim, and the rim is mounted on the mounting bracket; the suspension system includes a wheel axle support that connects the mounting bracket to the vehicle frame; the all-terrain vehicle further includes a drive half shaft, and the drive half shaft includes a constant velocity joint that is in transmission connection with the rim; at least part of the mounting bracket is formed with a protrusion, and the drive assembly further includes a drive bearing sleeved on the protrusion. The protrusion is rotatably connected to the wheel axle support through the drive bearing, and at least part of the constant velocity joint passes through the protrusion and is fixedly connected to the mounting bracket; Define a first plane and a second plane perpendicular to the width direction of the vehicle frame. The first plane basically bisects the tire, and the second plane basically bisects the drive bearing. Along the width direction of the vehicle frame, the range of the minimum distance between the first plane and the second plane is 0 to 10 mm.

89. The all-terrain vehicle according to claim 88, wherein the wheel axle support is provided with a receiving hole, at least part of the protrusion is located in the receiving hole, the drive bearing includes an inner ring and an outer ring. The inner ring is arranged around the protrusion and cooperates with the protrusion, and the outer ring is fixedly fitted with the inner wall of the receiving hole; the wheel axle support is provided with an avoidance hole communicating with the receiving hole, and the inner diameter of the avoidance hole gradually increases from the direction close to the receiving hole to the direction away from the receiving hole. The constant velocity joint includes a ball cage portion, and at least part of the ball cage portion is located in the avoidance hole; the axis of the receiving hole is basically coincident with the axis of the rim.

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