CN217554090U

CN217554090U - All-terrain vehicle

Info

Publication number: CN217554090U
Application number: CN202221382688.0U
Authority: CN
Inventors: 韦佳嘉; 李恒; 朱佳瑶
Original assignee: Zhejiang CFMOTO Power Co Ltd
Current assignee: Zhejiang CFMOTO Power Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-10-11
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses an all-terrain vehicle, include: a frame; the power assembly is at least partially arranged on the frame; an exhaust assembly including a muffler and an exhaust pipe; the muffler includes: the first air outlet pipe is arranged on one side of the silencer; the second air outlet pipe is arranged on the other side of the silencer; the first air outlet pipe and the second air outlet pipe are communicated with the same cavity; the communicating mechanism is used for communicating the chambers; exhaust waste gas of power component passes through the blast pipe and carries to the cavity in, and the cavity is carried waste gas to the external world through coupling mechanism and first outlet duct, and the cavity still is carried waste gas to the external world through coupling mechanism and second outlet duct. The utility model has the advantages that: the air outlet pipe of the silencer can be set to be double air outlet pipes, so that the exhaust flow distribution can be controlled, the overall air flow Mach number can be reduced, and the exhaust temperature can be reduced; control of exhaust backpressure is also facilitated.

Description

All-terrain vehicle

Technical Field

The utility model belongs to the technical field of the vehicle and specifically relates to indicate an all-terrain vehicle.

Background

The exhaust pipe and the muffler of the all-terrain vehicle are used for exhausting exhaust gas of the all-terrain vehicle during driving of the all-terrain vehicle, and the exhaust pipe and the muffler of the all-terrain vehicle are relatively high in temperature. In addition, the silencer is an important measure for eliminating aerodynamic noise and preventing the aerodynamic noise, is an important component in an exhaust system of the all-terrain vehicle, and is beneficial to reducing noise pollution in the driving process of the all-terrain vehicle.

In the prior art, the silencer of the traditional all-terrain vehicle adopts a single air outlet form, and has a simple internal structure, a single shape and a poor noise reduction effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model aims to provide an all-terrain vehicle which can improve the noise reduction effect.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an all-terrain vehicle comprising: a frame; the walking assembly is at least partially arranged on the frame and comprises a first walking wheel and a second walking wheel; the suspension assembly comprises a front suspension and a rear suspension, the first travelling wheel is connected with the frame through the front suspension, and the second travelling wheel is connected with the frame through the rear suspension; the power assembly is at least partially arranged on the frame; an exhaust assembly including a muffler and an exhaust pipe; the muffler includes: the first air outlet pipe is arranged on one side of the silencer; the second air outlet pipe is arranged on the other side of the silencer; the first air outlet pipe and the second air outlet pipe are communicated with the same cavity; the communicating mechanism is used for communicating the chambers; exhaust waste gas of power component passes through the blast pipe and carries to the cavity in, and the cavity is carried waste gas to the external world through coupling mechanism and first outlet duct, and the cavity still is carried waste gas to the external world through coupling mechanism and second outlet duct.

Further, the muffler includes a first exhaust passage and a second exhaust passage, the chamber, the communication mechanism, and the first outlet pipe forming the first exhaust passage, and the chamber, the communication mechanism, and the second outlet pipe forming the second exhaust passage.

Further, the chambers comprise a first chamber, a second chamber, a third chamber and a fourth chamber, the first chamber and the fourth chamber are respectively arranged on two sides of the silencer, and the second chamber and the third chamber are at least partially arranged between the first chamber and the fourth chamber.

Furthermore, at least part of the first air outlet pipe is arranged in the first cavity, at least part of the first air outlet pipe is arranged in the second cavity, and the first air outlet pipe is communicated with the third cavity and the outside respectively.

Furthermore, at least part of a second air outlet pipe is arranged in the fourth chamber, and the second air outlet pipe is communicated with the third chamber and the outside respectively.

Further, the communication mechanism includes: the first communicating pipe is at least partially arranged in the third chamber and is used for communicating the first chamber with the second chamber; the second communicating pipe is at least partially arranged in the third chamber and is respectively communicated with the second chamber and the fourth chamber; and a communication hole for communicating the fourth chamber and the third chamber.

Further, the muffler also comprises a partition plate, wherein the partition plate comprises a first partition plate, a second partition plate and a third partition plate; the first partition board is used for separating the first chamber from the second chamber, the second partition board is used for separating the second chamber from the third chamber, and the third partition board is used for separating the third chamber from the fourth chamber.

Further, the communication hole is provided in the third partition plate.

Furthermore, a through hole is formed in the first partition plate and is communicated with the first cavity and the second cavity.

Furthermore, both sides of the silencer are provided with a silencing layer and an accommodating space, and the silencing layer is arranged in the accommodating space; the both sides that the cavity is close to accommodation space all are provided with the bloop, bloop intercommunication cavity and accommodation space.

Compared with the prior art, the all-terrain vehicle provided by the utility model can set the air outlet pipe of the silencer as a double air outlet pipe, which is beneficial to controlling the exhaust flow distribution, reducing the overall air flow mach number and reducing the exhaust temperature; control of exhaust backpressure is also facilitated.

Drawings

Fig. 1 is a schematic structural diagram of the all-terrain vehicle of the present invention.

Fig. 2 is a partial structural schematic diagram of the all-terrain vehicle of the present invention.

Fig. 3 is a schematic view of the frame structure of the all-terrain vehicle of the present invention.

Fig. 4 is a schematic structural diagram of the fuel assembly of the all-terrain vehicle of the present invention.

Fig. 5 is a schematic view of the installation of the canister of the all-terrain vehicle of the present invention.

Fig. 6 is a partially enlarged view of K in fig. 4 according to the present invention.

Fig. 7 is a schematic structural view of the frame, the fuel tank and the traveling assembly of the all-terrain vehicle of the present invention.

Fig. 8 is a schematic view of the internal structure of the fuel tank of the all-terrain vehicle of the present invention.

Fig. 9 is a partial enlarged view of the region M in fig. 8 according to the present invention.

Fig. 10 is a schematic structural view of the traveling assembly, the fuel tank, and the exhaust assembly according to the present invention.

Fig. 11 is a schematic structural view of the exhaust assembly of the all-terrain vehicle of the present invention.

Fig. 12 is a schematic structural view of the steering assembly of the all-terrain vehicle of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, atv 100 includes a frame 11, a walking assembly 12, a suspension assembly 13, a power assembly 14, a saddle assembly 15, a mounting frame assembly 16, a brake assembly 17, an electrical assembly 18, a footrest assembly 19, a fuel assembly 21, a heat sink assembly 22, a body cover 25, a transmission assembly 26, and a steering assembly 27. Suspension assembly 13 includes a front suspension 131 and a rear suspension 132 for connecting frame 11 and undercarriage assembly 12. Walking assembly 12 is at least partially disposed on frame 11, walking assembly 12 includes a first road wheel 121 and a second road wheel 122, first road wheel 121 is connected to frame 11 via a front suspension 131, second road wheel 122 is connected to frame 11 via a rear suspension 132, and walking assembly 12 is used for movement of all-terrain vehicle 100. Power assembly 14 is at least partially disposed on frame 11 for providing power to ATV 100. The saddle assembly 15 is at least partially disposed on the frame 11 for riding by a user and/or passenger. A mounting bracket assembly 16 is at least partially disposed on frame 11 for mounting or dismounting other components adapted to atv 100. Brake assembly 17 is disposed at least partially on frame 11 and at least partially on undercarriage assembly 12 for braking undercarriage assembly 12 and, thus, atv 100. An electrical assembly 18 is disposed at least partially on the frame 11 for providing electrical power. Specifically, electrical assembly 18 is disposed on frame 11 via mounting bracket assembly 16. A footrest assembly 19 is at least partially disposed on frame 11 for providing support to a user and/or passenger's foot. A fuel assembly 21 is at least partially disposed on the frame 11 for providing a source of power to the power assembly 14. Heat sink assembly 22 is at least partially disposed on frame 11 for dissipating heat from ATV 100. A body cover 25 is at least partially disposed on the frame 11, and the body cover 25 is at least partially disposed on the mounting bracket assembly 16. Transmission assembly 26 is at least partially disposed on frame 11, transmission assembly 26 is connected to running assembly 12, and transmission assembly 26 is further connected to power assembly 14 for transmitting power of power assembly 14 to running assembly 12, thereby driving running assembly 12. Steering assembly 27 is at least partially connected to power assembly 14 for changing gears of atv 100. For clearly explaining the technical solution of the present invention, a front side, a rear side, a left side, a right side, an upper side, and a lower side as shown in fig. 1 are also defined.

As shown in fig. 3, the frame 11 includes a first pillar 111, a second pillar 112, a third pillar 113, a fourth pillar 114, an upper rail 115, and a lower rail 116, as one implementation. In the fore-aft direction of ATV 100, first leg 111 is disposed on the front side and fourth leg 114 is disposed on the rear side. The second strut 112 and the third strut 113 are each disposed between the first strut 111 and the fourth strut 114, and the second strut 112 is disposed on the front side of the third strut 113. In the up-down direction of atv 100, upper main beam 115 is disposed on the upper side, and lower main beam 116 is disposed on the lower side. The first column 111, the second column 112, the third column 113, and the fourth column 114 are disposed between the upper main beam 115 and the lower main beam 116. Specifically, the first pillar 111 includes a first pipe 1111, a second pipe 1112, and a first sheet metal member 1113. The second support column 112 includes a third tube 1121 and a fourth tube 1122. The third strut 113 includes a fifth tube member 1131, a sixth tube member 1132, a seventh tube member 1133, an eighth tube member 1134 and a second sheet metal member 1135. The fourth strut 114 includes a ninth tube 1141 and a tenth tube 1142. The upper main beams 115 include a first main beam 1151 and a second main beam 1152. The lower main beams 116 include a third main beam 1161 and a fourth main beam 1162. One end of the first pipe 1111 is connected with the first main beam 1151, the other end of the first pipe 1111 is connected with one end of the first sheet metal component 1113, and the other end of the first sheet metal component 1113 is connected with the third main beam 1161. One end of second pipe 1112 is connected to second main beam 1152, the other end of second pipe 1112 is connected to one end of first sheet metal component 1113, and the other end of first sheet metal component 1113 is connected to fourth main beam 1162. One end of the third tube 1121 is connected to the first main beam 1151, the other end of the third tube 1121 is connected to the third main beam 1161, one end of the fourth tube 1122 is connected to the second main beam 1152, and the other end of the fourth tube 1122 is connected to the third main beam 1161. One end of the fifth tube 1131 is connected to the first main beam 1151 and the other end of the fifth tube 1131 is connected to one end of the seventh tube 1133. One end of the sixth tube 1132 is connected to the first main rail 1151 and the other end of the sixth tube 1132 is connected to the other end of the seventh tube 1133. One end of the eighth tube 1134 is connected to the third main beam 1161, and the other end of the eighth tube 1134 is connected to the fourth main beam 1162. The seventh pipe member 1133 and the eighth pipe member 1134 are connected by a second sheet metal member 1135. One end of a ninth tube 1141 connects to the first main beam 1151 and the other end of the ninth tube 1141 connects to the third main beam 1161. One end of a tenth tube 1142 is connected to the second main beam 1152 and the other end of the tenth tube 1142 is connected to the fourth main beam 1162.

In this embodiment, along the left-right direction of ATV 100, first main beam 1151 is disposed on the left side of second main beam 1152, third main beam 1161 is disposed on the left side of fourth main beam 1162, first tube 1111 is disposed on the left side of second tube 1112, third tube 1121 is disposed on the left side of fourth tube 1122, fifth tube 1131 is disposed on the left side of sixth tube 1132, and ninth tube 1141 is disposed on the left side of tenth tube 1142. Along the up-down direction of atv 100, first pipe 1111 and second pipe 1112 all set up the upside of first sheet metal component 1113, first girder 1151 sets up the upside of third girder 1161, second girder 1152 sets up the upside of fourth girder 1162, seventh pipe 1133 sets up the upside of eighth pipe 1134, fifth pipe 1131 and sixth pipe 1132 all set up the upside of seventh pipe 1133, second sheet metal component 1135 sets up the downside of seventh pipe 1133 and sets up the upside of eighth pipe 1134. Through the arrangement, the first support column 111, the second support column 112, the third support column 113, the fourth support column 114, the upper main beam 115 and the lower main beam 116 form a basic frame of the frame 11, so that the strength of the frame 11 is improved, and the structures of the first support column 111, the second support column 112, the third support column 113, the fourth support column 114, the upper main beam 115 and the lower main beam 116 are optimized, namely pipe fittings are replaced by sheet metal structures, so that the number of the pipe fittings of the frame 11 is reduced, the weight of the all-terrain vehicle 100 is further reduced, and the light weight of the frame 11 and the all-terrain vehicle 100 is realized. Specifically, the pipe fitting of the lower half portion of the first support column 111 is replaced by a sheet metal part, so that the first support column 111 can be fixedly connected conveniently, and the sheet metal part can be convenient for mounting parts of the all-terrain vehicle 100, and the assembly performance of the all-terrain vehicle 100 can be improved. Specifically, a part of the pipe of the third strut 113 is replaced with a sheet metal member. Through the arrangement, the arrangement of the mounting structure can be reduced, the integration of the frame 11 is improved, and the light weight of the frame 11 is convenient to realize. In the present embodiment, a high-strength material of 20CrMo may be used for the frame 11, so that the strength of the frame 11 is improved and the weight of the frame 11 is reduced.

As an implementation, atv 100 comprises a plane of symmetry 101 perpendicular to the left-right direction, atv 100 being arranged substantially symmetrically with respect to plane of symmetry 101. The frame 11 is arranged substantially symmetrically with respect to the plane of symmetry 101. Specifically, first tube 1111 and second tube 1112 are substantially symmetrically disposed about plane of symmetry 101, third tube 1121 and fourth tube 1122 are substantially symmetrically disposed about plane of symmetry 101, fifth tube 1131 and sixth tube 1132 are substantially symmetrically disposed about plane of symmetry 101, ninth tube 1141 and tenth tube 1142 are substantially symmetrically disposed about plane of symmetry 101, first main beam 1151 and second main beam 1152 are substantially symmetrically disposed about plane of symmetry 101, and third main beam 1161 and fourth main beam 1162 are substantially symmetrically disposed about plane of symmetry 101. In the present embodiment, the seventh pipe 1133 extends substantially in the left-right direction, and the eighth pipe 1134 extends substantially in the left-right direction.

As one implementation manner, a first space is enclosed by the first column 111, the second column 112, the upper main beam 115 and the lower main beam 116, a second space is enclosed by the second column 112, the third column 113, the upper main beam 115 and the lower main beam 116, and a third space is enclosed by the third column 113, the fourth column 114, the upper main beam 115 and the lower main beam 116. The front suspension 131 is at least partially arranged in the first space, i.e. the front suspension 131 is at least partially arranged between the first 111 and the second 112 strut. The power assembly 14 is at least partially disposed in the second space, i.e., the power assembly 14 is at least partially disposed between the second leg 112 and the third leg 113. The rear suspension 132 is at least partially disposed in the third space, i.e., the rear suspension 132 is at least partially disposed between the third pillar 113 and the fourth pillar 114. Specifically, at least a portion of the rear suspension 132 is disposed on the third strut 113. In the present embodiment, at least part of the rear suspension 132 is provided on the second sheet metal part 1135.

As shown in fig. 4 to 6, the fuel assembly 21 includes a fuel tank 211, a canister 212, and a pipe assembly 213. A fuel tank 211 is disposed at least partially on the frame 11 and on a rear side of the frame 11, and a pipe assembly 213 communicates the fuel tank 211 with the frame 11. The canister 212 is at least partially disposed on the frame 11, and the conduit assembly 213 communicates the canister 212 with the frame 11. Specifically, conduit assembly 213 includes a first conduit 2131 and a second conduit 2132. The first conduit 2131 is used to communicate the fuel tank 211 with the vehicle frame 11, and the second conduit 2132 is used to communicate the canister 212 with the vehicle frame 11. The fuel tank 211 is provided with a first breather pipe 2111, and the first breather pipe 2111 is provided above the fuel tank 211 in the vertical direction of the all-terrain vehicle 100, so that fuel oil and the like can be prevented from leaking from the first breather pipe 2111. The canister 212 is provided with a second vent pipe 2121, and the second vent pipe 2121 may be provided at a side surface of the canister 212 or an upper side of the canister 212. The vehicle frame 11 is provided with a breather pipe assembly 11d, and the breather pipe assembly 11d includes a third breather pipe 11da and a fourth breather pipe 11db. The first vent tube 2111 and the third vent tube 11da communicate with each other through the first pipe 2131, so that the gas in the fuel tank 211 is delivered into the vehicle body frame 11 through the first pipe 2131, and the gas is delivered from the vehicle body frame 11 to the outside. Through the arrangement, external silt, water and the like can be prevented from entering the fuel tank 211 from the first vent pipe 2111, and the service life and the working efficiency of the fuel tank 211 are improved. The second vent pipe 2121 and the fourth vent pipe 11db communicate with each other through the second pipe 2132, so that the gas in the canister 212 is delivered into the frame 11 through the second pipe 2132, and is further delivered from the frame 11 to the outside. Through the above arrangement, external silt or water and the like can be prevented from entering the carbon canister 212 from the second vent pipe 2121, and the service life and the working efficiency of the carbon canister 212 are improved. In this embodiment, the inner diameter of the first pipe 2131 substantially coincides with the outer diameter of the first vent pipe 2111 to facilitate connection of the first pipe 2131 and the first vent pipe 2111, and the inner diameter of the first pipe 2131 substantially coincides with the outer diameter of the third vent pipe 11da to facilitate connection of the first pipe 2131 and the third vent pipe 11 da. The inner diameter of the second tube 2132 substantially coincides with the outer diameter of the second vent tube 2121 to facilitate the connection of the second tube 2132 and the second vent tube 2121, and the inner diameter of the second tube 2132 substantially coincides with the outer diameter of the fourth vent tube 11db to facilitate the connection of the second tube 2132 and the fourth vent tube 11db. The first pipe 2131 and the first vent pipe 2111 are fixed by a clamp, the first pipe 2131 and the third vent pipe 11da are fixed by a clamp, the second pipe 2132 and the second vent pipe 2121 are fixed by a clamp, and the second pipe 2132 and the fourth vent pipe 11db are fixed by a clamp. Through the arrangement, the connection between the pipeline assembly 213 and the fuel tank 211 is more stable, and the connection between the pipeline assembly 213 and the carbon canister 212 is more stable, so that the gas recovery rate of the fuel tank 211 and the carbon canister 212 is improved.

In one implementation, the frame 11 is provided with a through hole 11e, and the vent pipe assembly 11d is connected to the through hole 11e, so that the vent pipe assembly 11d is fixedly connected to the frame 11. Specifically, the vent tube assembly 11d is welded to the through hole 11e of the vehicle body frame 11, thereby improving the sealing performance of the vent tube assembly 11d, enabling the gas in the fuel tank 211 and/or the canister 212 to be substantially transferred to the vehicle body frame 11, and improving the gas recovery rate of the fuel tank 211 and/or the canister 212. In this embodiment, ATV 100 includes a plane of projection 103 perpendicular to the fore-aft direction and a horizontal plane 104 perpendicular to the up-down direction. The projection of horizontal plane 104 onto projection plane 103 is a thirteenth projection line and the projection of the axis of air duct assembly 11d onto projection plane 103 is a fourteenth projection line along the fore-and-aft direction of atv 100. The angle formed by the thirteenth projection line and the fourteenth projection line is an included angle mu. The angle of the included angle mu is greater than or equal to 0 DEG and less than or equal to 180 deg. Specifically, the angle of the included angle μ is 45 ° or more and 135 ° or less. In the present embodiment, the angle of the included angle μ is 90 °. Through the arrangement, the gas of the fuel tank 211 and/or the carbon canister 212 can be conveyed into the frame 11 from bottom to top, and the gas recovery rate of the fuel tank 211 and/or the carbon canister 212 is improved.

As shown in fig. 7, as an implementation manner, a center of the opening of the third air pipe 11da away from the frame 11 is a first center. Atv 100 includes a plane of symmetry 101 perpendicular to the left-right direction. The first vent tube 2111 is disposed substantially parallel to the horizontal plane 104. The axis of walking assembly 12 extends substantially in the left-right direction of ATV 100. Along the left-right direction of the all-terrain vehicle 100, the projection of the first circle center on the symmetry plane 101 is a fifth projection point, the projection of the axis of the first breather pipe 2111 on the symmetry plane 101 is a fifteenth projection line, and the projection of the axis of the walking assembly 12 on the symmetry plane 101 is a sixth projection point. Along the front-back direction of the all-terrain vehicle 100, the projection of the fifth projection point on the projection plane 103 is a seventh projection point, and the projection of the sixth projection point on the projection plane 103 is an eighth projection point. The distance between the seventh projection point and the eighth projection point is H1, and the distance between the fifteenth projection line and the sixth projection point is H2. The ratio of H1 to H2 is 1 or more and 1.43 or less. Specifically, the ratio of H1 to H2 is 1.02 or more and 1.32 or less. In the present embodiment, the ratio of H1 to H2 is 1.05 or more and 1.21 or less. In addition, the ratio of the radius R of the walking assembly 12 to H2 is 1 or more, that is, the ratio of the radius R of the first walking wheel 121 to H2 is 1 or more, and the ratio of the radius R of the second walking wheel 122 to H2 is 1 or more. Further, an opening of an end of the fourth breather pipe 11db remote from the frame 11 in the up-down direction of the all-terrain vehicle 100 is provided on an upper side of the second breather pipe 2121. Through the arrangement, the third vent pipe 11da is higher than the first vent pipe 2111, and the third vent pipe 11da cannot be arranged upwards through the angle limitation of the third vent pipe 11da, so that the height of the first pipeline 2131 from the first vent pipe 2111 to the third vent pipe 11da is increased, gas generated by fuel oil can flow into the fuel tank 211 again after being liquefied by cooling in the first pipeline 2131, the emission of the fuel oil gas is reduced, and the gas recovery rate of the fuel tank 211 is improved. In addition, by the above arrangement, the fourth vent pipe 11db can be positioned higher than the second vent pipe 2121, and the fourth vent pipe 11db cannot be positioned upward by restricting the angle of the fourth vent pipe 11db, so that the height of the second tube 2132 from the second vent pipe 2121 to the fourth vent pipe 11db is always increased, and the gas generated in the canister 212 can be cooled and liquefied in the second tube 2132 and then can be returned to the canister 212, thereby reducing the emission of the gas in the canister 212 and improving the gas recovery rate of the canister 212.

As shown in fig. 8 and 9, the fuel tank 211 includes a tank 2112 and an oil pump 2113, as one implementation. The case 2112 is formed with a third accommodation space 2112a, and an oil pump 2113 is at least partially disposed in the third accommodation space 2112 a. The tank 2112 is adapted to contain fuel, and the oil pump 2113 is adapted to pump fuel from the tank 2112 to the power assembly 14. Specifically, the tank 2112 is provided with a plurality of connecting members 2112b, and the connecting members 2112b are used for connecting the tank 2112 and the frame 11, so that the connection between the fuel tank 211 and the frame 11 is more stable.

Specifically, the oil pump 2113 includes an oil suction port 2113a, and an axis of the oil suction port 2113a is disposed substantially parallel to the horizontal plane 104. The oil suction port 2113a is used to deliver fuel from the tank 2112 to the oil pump 2113. The box 2112 includes a first body 2112c and a second body 2112d. The first body 2112c is disposed at least partially on the upper side of the second body 2112d in the up-down direction of the atv 100, and the first body 2112c and the second body 2112d are connected. The oil pump 2113 is at least partially disposed in the first body 2112c and at least partially disposed in the second body 2112d. The lower bottom surface of the oil pump 2113 is connected to or abuts the inner bottom surface of the second main body 2112d. Here, the inner bottom surface of the second main body 2112d refers to a surface of the inside of the second main body 2112d near the lower bottom surface of the oil pump 2113. In the present embodiment, a first extension portion 2112e is provided at the lower edge of the first body 2112c, and a second extension portion 2112f is provided at the upper edge of the second body 2112d. The first extension portion 2112e is integrally formed with the first body 2112c, and the second extension portion 2112f is integrally formed with the second body 2112d. After the first main body 2112c and the second main body 2112d are connected, the first extension portion 2112e is disposed on the upper side of the second extension portion 2112f, the first extension portion 2112e and the second extension portion 2112f abut, and the outer contour of the first extension portion 2112e substantially matches the outer contour of the second extension portion 2112f. An installation part 2112g is formed after the first extension part 2112e and the second extension part 2112f are abutted, a plurality of first installation points 2112h are arranged on the installation part 2112g, and the first main body 2112c and the second main body 2112d are connected through the plurality of first installation points 2112 h.

As one implementation, the inner bottom surface of the second body 2112d is substantially parallel to the horizontal plane 104. Along the left-right direction of the all-terrain vehicle 100, the projection of the axis of the oil suction port 2113a on the symmetry plane 101 is a sixteenth projection line, and the projection of the inner bottom surface of the second main body 2112d on the symmetry plane 101 is a seventeenth projection line. The distance between the sixteenth projection line and the seventeenth projection line is H3. H3 is not less than 5.8mm and not more than 10.8mm. Specifically, H3 is 6.6mm or more and 10mm or less. In the present embodiment, H3 is 7.4mm or more and 9.2mm or less. Through the arrangement, the situation that the oil suction port 2113a is too low to cause difficulty in oil suction of the oil pump 2113 can be avoided, and the situation that the oil suction port 2113a is too high to cause too much residual oil can also be avoided, so that the available volume of the fuel tank 211 is increased under the condition that the oil suction efficiency of the oil pump 2113 is high. The residual oil amount refers to an amount of oil remaining in the fuel tank 211 due to the oil suction port 2113a not being sucked.

As shown in fig. 8 and 10, as one implementation manner, the fuel tank 211 further includes a refueling portion 2114, the refueling portion 2114 is disposed at an upper side of the fuel tank 211 and is communicated with the fuel tank 211, the refueling portion 2114 and the fuel tank 211 are integrally formed, and the refueling portion 2114 is used for providing a fuel input port for the fuel tank 211. The fueling portion 2114 extends substantially along a predetermined straight line 2114b, and the fueling portion 2114 passes through the vehicle body cover 25 along the predetermined straight line 2114b and projects out of the plane in which the vehicle body cover 25 is located. That is, the uppermost end of the fueling portion 2114 is on the upper side of the vehicle body cover 25. Specifically, the acute angle μ formed between the preset straight line 2114b and the horizontal plane 104 is 35 ° or more and less than 90 °. With the above arrangement, when the all-terrain vehicle 100 is refueled, fuel can be conveniently fed into the refueling portion 2114. One end of the filler 2114 communicates with the fuel tank 211, and the other end of the filler 2114 extends upward. An end of the filler 2114 remote from the fuel tank 211 is provided with a filler 2114a, and the cross section of the filler 2114a is substantially circular. The shortest distance between the center of the cross section of the oil filler 2114a and the symmetric plane 101 is D5. Atv 100 also includes exhaust assembly 28. Exhaust assembly 28 is at least partially coupled to power assembly 14 and is at least partially disposed on frame 11 for exhausting exhaust gases generated by power assembly 14 to an exterior of ATV 100. The exhaust assembly 28 includes a muffler 283 (see fig. 2), an exhaust pipe 281, and a catalyst 282. A catalyst 282 is provided at any position between both ends of the exhaust pipe 281 for purifying exhaust gas discharged from the power module 14. One end of the exhaust pipe 281 is connected to the power module 14, and the other end of the exhaust pipe 281 is connected to the muffler 283, the exhaust pipe 281 being used to form a waste transportation path for the exhaust of the power module 14. The axis of catalyst 282 extends substantially in the fore-aft direction of ATV 100. The shortest distance between the axis of the catalyst 282 and the plane of symmetry 101 is D6.

In one implementation, exhaust assembly 28 is disposed at least partially on one side of ATV 100, and fueling port 2114a is disposed on the other side of ATV 100 from exhaust assembly 28. Specifically, the oil filler 2114a and the catalyst 282 are respectively provided on the left and right sides of the symmetry plane 101 in the left-right direction of the all-terrain vehicle 100; i.e., the oil fill port 2114a and at least a portion of the exhaust assembly 28, are disposed on the left and right sides of the plane of symmetry 101, respectively. In this embodiment, the oil fill port 2114a may be disposed to the left of the plane of symmetry 101 and the catalyst 282 may be disposed to the right of the plane of symmetry 101, i.e., the exhaust assembly 28 is disposed at least partially to the right of the plane of symmetry 101. It is appreciated that oil port 2114a may be disposed to the right of plane of symmetry 101 and catalyst 282 may be disposed to the left of plane of symmetry 101, i.e., exhaust assembly 28 is disposed at least partially to the left of plane of symmetry 101. Through the arrangement, the oil filling port 2114a and the exhaust assembly 28 can be respectively arranged on the left side and the right side of the all-terrain vehicle 100, so that potential safety hazards caused by oil liquid dripping on the exhaust assembly 28 are avoided when the fuel tank 211 is filled with oil, and the safety of the all-terrain vehicle 100 is improved.

Second road wheels 122 include first rear wheels 1221 and second rear wheels 1222. The first rear wheel 1221 includes a third symmetry plane 1221a perpendicular to the left-right direction, and the first rear wheel 1221 is substantially symmetrically disposed about the third symmetry plane 1221 a. The second rear wheel 1222 includes a fourth symmetry plane 1222a perpendicular to the left-right direction, and the second rear wheel 1222 is substantially symmetrically disposed with respect to the fourth symmetry plane 1222 a. The distance between the third symmetry plane 1221a and the fourth symmetry plane 1222a is a second track width D2. The ratio of D5 to D2 is 0.21 or more and 0.41 or less. The ratio of D6 to D2 is 0.08 or more and 0.17 or less. Specifically, the ratio of D5 to D2 is 0.24 or more and 0.38 or less. The ratio of D6 to D2 is not less than 0.09 and not more than 0.15. In the present embodiment, the ratio of D5 to D2 is 0.27 or more and 0.34 or less. The ratio of D6 to D2 is 0.11 or more and 0.14 or less. In addition, through the arrangement, the arrangement distance between the oil filling port 2114a and the catalyst 282 is reasonable, and the arrangement distance between the oil filling port 2114a and the exhaust assembly 28 is reasonable, so that the arrangement space of the oil filling portion 2114 and the exhaust assembly 28 is saved, the space utilization rate of the all-terrain vehicle 100 is improved, and the structure of the all-terrain vehicle 100 is more compact under the condition that the safety of the all-terrain vehicle 100 is improved, namely under the condition that oil is prevented from dropping to the exhaust assembly 28.

As shown in fig. 11, as one implementation, the silencer 283 includes several chambers 2831, several communication mechanisms 2832, a first air outlet pipe 2833, and a second air outlet pipe 2834. The first outlet duct 2833 and the second outlet duct 2834 are disposed at both sides of the muffler 283, and the first outlet duct 2833 and the second outlet duct 2834 are both communicated with the same chamber 2831. Several communication mechanisms 2832 are used to communicate several chambers 2831. Through the arrangement, the air outlet pipe of the silencer 283 is arranged into the double air outlet pipes, so that the exhaust flow distribution is favorably controlled, the Mach number of the whole air flow is reduced, and the exhaust temperature can be reduced. In addition, through the arrangement, the control of exhaust back pressure is facilitated. The Mach number of the airflow is used for representing the moving speed of the flowing gas, namely the airflow; exhaust back pressure refers to the resistance pressure of the engine exhaust.

Specifically, chambers 2831 include a first chamber 2831a, a second chamber 2831b, a third chamber 2831c, and a fourth chamber 2831d. The first chamber 2831a, the second chamber 2831b, the third chamber 2831c and the fourth chamber 2831d are all independently arranged, that is, the first chamber 2831a, the second chamber 2831b, the third chamber 2831c and the fourth chamber 2831d are not basically communicated. The first and

fourth chambers

2831a and 2831d are disposed at both sides of the muffler 283, respectively. Second chamber 2831b and third chamber 2831c are each at least partially disposed between first chamber 2831a and fourth chamber 2831d. Wherein the second chamber 2831b is disposed proximate the first chamber 2831a and the third chamber 2831c is disposed proximate the fourth chamber 2831d. First outlet duct 2833 is at least part to be set up in first cavity 2831a, and first outlet duct 2833 is at least part to be set up in second cavity 2831b, and first outlet duct 2833 communicates third cavity 2831c and the external world respectively. The second air outlet pipe 2834 is at least partially disposed in the fourth chamber 2831d, and the second air outlet pipe 2834 is respectively communicated with the third chamber 2831c and the outside. The exhaust pipe 281 communicates with the first chamber 2831a.

Specifically, the communication mechanism 2832 includes a first communication pipe 2832a, a second communication pipe 2832b, and a communication hole 2832c. The first communication pipe 2832a is at least partially disposed in the first chamber 2831a, the first communication pipe 2832a is at least partially disposed in the second chamber 2831b, and the first communication pipe 2832a is also at least partially disposed in the third chamber 2831c. The first communication pipe 2832a serves to communicate the first chamber 2831a and the second chamber 2831b. In this case, the first communication pipe 2832a disposed in the third chamber 2831c is substantially U-shaped, so that the exhaust gas is firstly transmitted from the first communication pipe 2832a of the first chamber 2831a to the first communication pipe 2832a of the second chamber 2831b, then transmitted from the first communication pipe 2832a of the second chamber 2831b to the first communication pipe 2832a of the third chamber 2831c, and finally transmitted from the first communication pipe 2832a of the third chamber 2831c to the second chamber 2831b. The second communication pipe 2832b is at least partially disposed in the third chamber 2831c, and the second communication pipe 2832b communicates the second chamber 2831b and the fourth chamber 2831d, respectively. The communication hole 2832c is for communicating the fourth chamber 2831d and the third chamber 2831c.

In the present embodiment, the muffler 283 further includes a partition 2835. A partition 2835 is arranged between the first chamber 2831a and the second chamber 2831b, a partition 2835 is arranged between the second chamber 2831b and the third chamber 2831c, and a partition 2835 is arranged between the third chamber 2831c and the fourth chamber 2831d. Specifically, the partition 2835 includes a first partition 2835a, a second partition 2835b, and a third partition 2835c. The first partition 2835a serves to partition the first chamber 2831a and the second chamber 2831b. The second partition 2835b serves to separate the second chamber 2831b and the third chamber 2831c. Third partition 2835c serves to separate third chamber 2831c from fourth chamber 2831d. Wherein, the communication hole 2832c is provided on the third partition 2835c.

Through the above arrangement, the exhaust gas can flow in the first chamber 2831a, the second chamber 2831b, the third chamber 2831c and the fourth chamber 2831d, and flow in the first communicating pipe 2832a and the second communicating pipe 2832b, so that the temperature of the exhaust gas is reduced, that is, the temperature in the exhaust period is reduced; the exhaust flow distribution is controlled, and the overall air flow Mach number is reduced; the control of the exhaust back pressure is facilitated, and the exhaust back pressure of the silencer 283 is reduced by more than 15 percent compared with that of the traditional silencer; the silencing performance of the silencer 283 can be obviously improved compared with that of a traditional silencer, and the full-band silencing quantity can be improved by more than 10 dB. In addition, the arrangement is favorable for improving the acceleration power feeling of the exhaust Noise of the all-terrain vehicle 100, and improving the NVH (Noise, vibration, harshness) sound quality level of the all-terrain vehicle 100, namely improving the Noise elimination and reduction effect of the silencer 283. Wherein, NVH is a general term of various indexes such as automobile noise, vibration, comfort and the like.

As an implementation mode, the first partition 2835a is further provided with a plurality of through holes 2835d, and the number of the through holes 2835d can be adjusted according to actual requirements. The plurality of through holes 2835d communicate the first chamber 2831a and the second chamber 2831b, so that excessive air flow can be conveyed from the first chamber 2831a to the second chamber 2831b, and excessive air flow can also be conveyed from the second chamber 2831b to the first chamber 2831a, thereby preventing the air pressure of the chamber 2831 from being too high, and being beneficial to balancing the air pressure in the chamber 2831. In addition, a silencing layer 2838 is further disposed on a side of the silencer 283 close to the exhaust pipe 281, a silencing layer 2838 is also disposed on a side of the silencer 283 away from the exhaust pipe 281, and the silencing layer 2838 is used for absorbing noise generated by the silencer 283, so that noise reduction and silencing of the silencer 283 are facilitated. Specifically, an accommodating space 2837 is provided on a side of the muffler 283 close to the exhaust pipe 281, and an accommodating space 2837 is also provided on a side of the muffler 283 away from the exhaust pipe 281, where the accommodating space 2837 is a substantially closed space. The sound damping layer 2838 is at least partially disposed in the receiving space 2837. The two sides of the chamber 2831 close to the accommodating space 2837 are provided with silencing holes 2838a, and the silencing holes 2838a are communicated with the chamber 2831 and the accommodating space 2837. The muffling hole 2838a serves to transfer noise generated from the muffler 283 into the accommodating space 2837, so that the muffling layer 2838 reduces noise generated from the muffler 283 and muffles the noise, thereby improving the muffling performance of the muffler 283. In this embodiment, the sound absorbing layer 2838 may be made of a sound absorbing material such as glass fiber.

As one implementation, the muffler 283 includes an exhaust channel 2836. The exhaust gas is conveyed from the exhaust pipe 281 to the first chamber 2831a, the exhaust gas in the first chamber 2831a is conveyed to the second chamber 2831b through the first communicating pipe 2832a, the exhaust gas in the second chamber 2831b is conveyed to the fourth chamber 2831d through the second communicating pipe 2832b, the exhaust gas in the fourth chamber 2831d is conveyed to the third chamber 2831c through the communicating hole 2832c, and the exhaust gas in the third chamber 2831c is conveyed to the outside through the first air outlet pipe 2833 and the second air outlet pipe 2834, so that an exhaust passage 2836 of the exhaust gas is formed. Specifically, exhaust channel 2836 includes at least a first exhaust channel and a second exhaust channel. A path through which the exhaust gas is sequentially transferred to the outside from the first chamber 2831a, the first communicating pipe 2832a, the second chamber 2831b, the second communicating pipe 2832b, the fourth chamber 2831d, the communicating hole 2832c, the third chamber 2831c, and the first outlet pipe 2833 is a first exhaust path. A passage through which the exhaust gas is sequentially transferred to the outside from the first chamber 2831a, the first communicating pipe 2832a, the second chamber 2831b, the second communicating pipe 2832b, the fourth chamber 2831d, the communicating hole 2832c, the third chamber 2831c, and the second outlet pipe 2834 is a second exhaust passage. The first exhaust passage and the second exhaust passage may be provided independently, and the first exhaust passage and the second exhaust passage may be communicated with each other.

As shown in fig. 12, as one implementation, the operating assembly 27 includes a shifting assembly 271. One end of the shifting unit 271 is connected to the power unit 14, and the other end of the shifting unit 271 is used for the user to operate the operating unit 27. In this embodiment, shift assembly 271 includes a shift ball (not shown), a shift rocker arm 2711 and a shift rod 2712. One end of shift rocker arm 2711 is connected with power assembly 14, the other end of shift rocker arm 2711 is connected with one end of shift pull rod 2712, and the other end of shift pull rod 2712 is connected with a shift ball head. The shift knob is used for the user to operate the operating assembly 27. The shift rocker arm 2711 is used for changing gears of the all-terrain vehicle 100. Specifically, a bent portion is formed by bending any position between both ends of the shift link 2712. The bent portion is used for avoiding peripheral parts of the shifting unit 271, so that the shifting unit 271 does not interfere with the peripheral parts.

As an implementation, the shifting assembly 271 further comprises an adjustment lever 2713. The adjustment rod 2713 is used to adjust the length of the shift rod 2712, so that the length of the shift rod 2712 is suitable for different all terrain vehicles 100, thereby improving the versatility of the shift assembly 271. The adjustment rod 2713 may be provided on either or both ends of the shift rod 2712, thereby satisfying the user's adjustment of the length of the shift rod 2712 under different conditions and improving the adjustability of the shift rod 2712. Wherein, the length of adjusting pole 2713 can be adjusted according to actual demand. Specifically, when the adjusting rod 2713 is disposed at one end of the shift rod 2712 close to the shift rocker arm 2711, one end of the adjusting rod 2713 is connected with the shift rod 2712, and the other end of the adjusting rod 2713 is connected with the shift rocker arm 2711. When the adjusting rod 2713 is arranged at one end of the gear shifting pull rod 2712 far away from the gear shifting rocker arm 2711, one end of the adjusting rod 2713 is connected with the gear shifting pull rod 2712, and the other end of the adjusting rod 2713 is connected with a gear shifting ball head. When the adjustment rods 2713 are provided at both ends of the shift lever 2712, the adjustment rods 2713 include a first adjustment rod and a second adjustment rod. One end of the first adjusting rod is connected with one end of a gear shifting pull rod 2712, and the other end of the first adjusting rod is connected with a gear shifting rocker arm 2711. One end of the second adjusting rod is connected with the other end of the gear shifting pull rod 2712, and the other end of the second adjusting rod is connected with the gear shifting ball head. In this embodiment, the adjusting mechanism 2713a is disposed at both ends of the adjusting rod 2713, and the adjusting mechanism 2713a may be an adjusting nut, thereby realizing adjustment of the length of the shift assembly 271. Through the arrangement, when the length of the shift pull rod 2712 is adjusted, the length of the shift pull rod 2712 can be adjusted only by rotating the adjusting rod 2713, and the adjustment convenience of the shift pull rod 2712 is improved. In addition, through the arrangement, the adjustability of the shift rod 2712 can be improved, and meanwhile, the interference between the bent parts and peripheral parts caused by the rotation of the shift rod 2712 is avoided, so that the structure compactness of the all-terrain vehicle 100 is improved. In this embodiment, the adjustment rod 2713 may be disposed on either or both ends of the shift rod 2712, and the adjustment rod 2713 may be disposed on the left and/or right side of the all terrain vehicle 100 to facilitate user operation and to facilitate assembly of the shift assembly 271.

It will be appreciated that the adjustment rod 2713 may also be arranged at any position between the two ends of the shift rod 2712. At this time, one end of shift rod 2712 is connected to the shift ball, and the other end of shift rod 2712 is connected to shift rocker arm 2711.

As one implementation, the shift rod 2712 includes at least a first length and a second length. Wherein, the first length refers to the shortest length of the shift rod 2712 after being adjusted by the adjusting rod 2713; the second length refers to the longest length of the shift rod 2712 after being adjusted by the adjustment rod 2713. Specifically, the difference between the first length and the second length is greater than or equal to 0mm and less than or equal to 50mm. In the present embodiment, the difference between the first length and the second length is not less than 0mm and not more than 35mm. Further, the difference between the first length and the second length is not less than 0mm and not more than 20mm. Through the arrangement, the requirements of the gear shifting assemblies 271 of different all-terrain vehicles 100 can be met, so that the universality of the gear shifting assemblies 271 is improved, the manufacturing errors of the all-terrain vehicles 100 can be compensated, and the assembly performance of the all-terrain vehicles 100 is improved conveniently.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. An all-terrain vehicle comprising:

a frame;

the walking assembly is at least partially arranged on the frame and comprises a first walking wheel and a second walking wheel;

the suspension assembly comprises a front suspension and a rear suspension, the first travelling wheel is connected with the frame through the front suspension, and the second travelling wheel is connected with the frame through the rear suspension;

a power assembly at least partially disposed on the frame;

an exhaust assembly including a muffler and an exhaust pipe;

it is characterized in that the preparation method is characterized in that,

the muffler includes:

the first air outlet pipe is arranged on one side of the silencer;

the second air outlet pipe is arranged on the other side of the silencer;

the first air outlet pipe and the second air outlet pipe are communicated with the same cavity;

a communication mechanism for communicating the chambers;

exhaust gas discharged by the power assembly is conveyed to the chamber through the exhaust pipe, the chamber conveys the exhaust gas to the outside through the communicating mechanism and the first air outlet pipe, and the chamber also conveys the exhaust gas to the outside through the communicating mechanism and the second air outlet pipe.

2. The all-terrain vehicle of claim 1, characterized in that the muffler comprises a first exhaust passage and a second exhaust passage, the chamber, the communication mechanism, and the first outlet tube forming the first exhaust passage, the chamber, the communication mechanism, and the second outlet tube forming the second exhaust passage.

3. The all-terrain vehicle of claim 1, characterized in that the chambers comprise a first chamber, a second chamber, a third chamber, and a fourth chamber, the first chamber and the fourth chamber being disposed on either side of the muffler, respectively, each of the second chamber and the third chamber being disposed at least partially between the first chamber and the fourth chamber.

4. The all-terrain vehicle of claim 3, characterized in that the first outlet duct is at least partially disposed in the first chamber, the first outlet duct is at least partially disposed in the second chamber, and the first outlet duct communicates with the third chamber and the environment, respectively.

5. The all-terrain vehicle of claim 3, characterized in that the second outlet duct is at least partially disposed in the fourth chamber, the second outlet duct communicating with the third chamber and the ambient, respectively.

6. The all-terrain vehicle of claim 3, characterized in that the communication mechanism comprises:

a first communication tube further at least partially disposed in the third chamber, the first communication tube

The first communicating pipe is used for communicating the first chamber and the second chamber;

the second communicating pipe is at least partially arranged in the third chamber and is respectively communicated with the second chamber and the fourth chamber;

and a communication hole for communicating the fourth chamber and the third chamber.

7. The all-terrain vehicle of claim 6, characterized in that the muffler further comprises partitions, including a first partition, a second partition, and a third partition; the first partition is used for separating the first chamber from the second chamber, the second partition is used for separating the second chamber from the third chamber, and the third partition is used for separating the third chamber from the fourth chamber.

8. The all-terrain vehicle of claim 7, characterized in that the communication aperture is disposed in the third partition.

9. The all-terrain vehicle of claim 7, characterized in that the first partition is provided with a through hole, which communicates the first chamber and the second chamber.

10. The all-terrain vehicle of claim 1, characterized in that both sides of the muffler are provided with a sound-deadening layer and a receiving space, the sound-deadening layer being disposed in the receiving space; the two sides of the cavity, which are close to the accommodating space, are provided with silencing holes, and the silencing holes are communicated with the cavity and the accommodating space.