All-terrain vehicle

Abstract

The invention discloses an all-terrain vehicle which comprises a vehicle frame, a vehicle body covering part, an engine and a walking assembly. The vehicle body covering part is at least partially arranged on the vehicle frame; the engine comprises an air inlet assembly and an engine oil filter. An air guiding pipe used for air inlet is arranged in the air inlet assembly. The walking assembly is in transmission connection with the engine. A reinforcing structure, a filter valve and a guide structure are arranged in the air guide pipe and divide the air guide pipe into an input space, a filter space and an output space, the input space is communicated with the outside, the output space is communicated with the engine oil filter, and air in the input space is guided into the filter space through the reinforcing structure and the guide structure. The filter space communicates with the filter valve. Through the arrangement, the water vapor filtering effect of the air inlet assembly is improved, so that the interior of the engine is prevented from being rusted, and the service life of the engine is prolonged.

Description

Technical Field

[0001] The invention relates to the field of vehicle engineering, in particular to an all-terrain vehicle. Background Art

[0002] All-terrain vehicles are vehicles that are powered by a fuel engine and can travel on any terrain. When the engine obtains the air required for combustion, it will inevitably carry some water vapor. In order to prevent water vapor from entering the engine, the water vapor or rainwater carried in the air is generally filtered during the air filter stage. However, the existing air filter is not effective enough to filter water vapor or rainwater to meet the complex operating conditions of all-terrain vehicles, which will cause irreversible corrosion damage to the engine. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, an object of the present invention is to provide an all-terrain vehicle, which can solve the problem that the engine is easily corroded and thus its life is reduced.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An all-terrain vehicle comprises a frame, a body covering, an engine and a traveling assembly; the body covering is at least partially arranged on the frame; the engine comprises an intake assembly and an oil filter, and an air duct for air intake is arranged in the intake assembly; the traveling assembly is transmission-connected to the engine; a reinforcement structure, a filter valve and a guide structure are arranged in the air duct, and the reinforcement structure, the filter valve and the guide structure divide the air duct into an input space, a filter space and an output space, the input space is connected to the outside, and the output space is connected to the oil filter, the air in the input space is guided to the filter space via the reinforcement structure and the guide structure, and the filter space is connected to the filter valve.

[0006] Furthermore, the air duct is provided with an air inlet, which is arranged at one end of the air duct, and the filter valve is arranged at the other end of the air duct.

[0007] Further, the reinforcement structure is arranged between the filter valve and the air inlet.

[0008] Further, the reinforcement structure substantially extends along a direction from the air inlet to the filter valve.

[0009] Furthermore, the guide structure substantially extends along the direction from the filter valve to the reinforcement structure, and a gap connecting the filter space and the output space is provided between the guide structure and the reinforcement mechanism.

[0010] Further, a wavelength tube is arranged on the upper side of the filter valve, and the wavelength tube and the filter valve are arranged on the same side of the guide structure.

[0011] Furthermore, the air duct and the wavelength tube are integrally formed, the air duct is respectively connected to one end of the wavelength tube and the external space, and the other end of the wavelength tube away from the filter valve is closed.

[0012] Furthermore, the wavelength tube includes a first part and a second part, and an extension direction of the first part and an extension direction of the second part are substantially perpendicular to each other.

[0013] Furthermore, a transition structure is provided between the first part and the second part.

[0014] Furthermore, the transition structure is configured to be arc-shaped.

[0015] The reinforcement structure and the guide structure provided by the present invention can improve the filtering effect of the air intake component on water vapor, thereby preventing the interior of the engine from being rusted and extending the service life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the all-terrain vehicle of the present application;

[0017] Figure 2 A schematic diagram of the three-dimensional structure of the powertrain of the present application;

[0018] Figure 3 An exploded diagram of the engine for this application;

[0019] Figure 4 A three-dimensional schematic diagram of an intake assembly of the engine of the present application;

[0020] Figure 5 A cross-sectional view of a partial structure of an intake assembly of the engine of the present application;

[0021] Figure 6 A three-dimensional schematic diagram of a filter assembly of an air intake assembly of an engine of the present application;

[0022] Figure 7 An exploded view of a filter assembly of an air intake assembly of an engine of the present application;

[0023] Figure 8 A three-dimensional schematic diagram of an intake manifold of the engine of the present application;

[0024] Fig. 9 A cross-sectional view of an intake manifold of the engine of the present application;

[0025] Fig.10 A side view of an intake manifold of the engine of the present application;

[0026] Fig.11 The engine of this application Fig.10 A cross-sectional view of an intake manifold in FIG.

[0027] Fig.12 A top view of the intake manifold of the engine of the present application; DETAILED DESCRIPTION

[0028] In order to make the technical scheme of the present application better understood by the persons skilled in the art, the technical scheme in the specific implementation mode of the present application will be described clearly and completely in combination with the drawings in the implementation mode of the present application. It should be understood that, for the ordinary technicians in the field, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the claims attached to the present application.

[0029] like Figures 1 to 3 As shown, the present application provides a power assembly 100 and an all-terrain vehicle 200 using the power assembly 100. The all-terrain vehicle 200 includes a frame 21, a body cover 22, a transmission system (not shown), a steering system 24 and a travel assembly 25. The power assembly 100 is at least partially arranged on the frame 21, the transmission system is connected to the power assembly 100 by transmission, and the travel assembly 25 is connected to the power assembly 100 by transmission through the transmission system. The power assembly 100 outputs the driving force of the all-terrain vehicle 200, and transmits the driving force to the travel assembly 25 through the transmission system, so that the travel assembly 25 drives the all-terrain vehicle 200 to travel. The steering system 24 is at least partially connected to the travel assembly 25, and the steering system 24 is used to control the travel direction of the all-terrain vehicle 200.

[0030] The power assembly 100 includes an engine 11, a clutch 12 and a reduction box 13. The clutch 12 is arranged between the engine 11 and the reduction box 13 and is used to transmit the power of the engine 11 to the reduction box 13. The engine 11 includes a housing 111, a valve mechanism 112, a fuel supply mechanism (not shown), a crank connecting rod mechanism 114, an ignition mechanism 115, an oil pumping mechanism 116 and an oil delivery mechanism 117. The housing 111 is surrounded by a receiving space, and the valve mechanism 112, the fuel supply mechanism, the crank connecting rod mechanism 114 and the ignition mechanism 115 are at least partially arranged in the receiving space. The housing 111 includes a cylinder head cover 1111, a cylinder head 1112, a cylinder block 1113, a crankcase 1114 and an oil pan 1115. The cylinder head 1112 is at least partially disposed between the cylinder head cover 1111 and the cylinder block 1113, and the cylinder head 1112 is used to connect the cylinder head cover 1111 and the cylinder block 1113. The crankcase 1114 is at least partially disposed between the cylinder block 1113 and the oil pan 1115, and the crankcase 1114 is used to connect the cylinder block 1113 and the oil pan 1115.

[0031] The cylinder body 1113 is provided with a combustion chamber, the valve mechanism 112 is connected to the external space and the combustion chamber, the fuel supply mechanism is at least partially connected to the valve mechanism 112, the fuel provided by the fuel supply mechanism and the air provided by the valve mechanism 112 are mixed to form a mixed gas and transmitted to the combustion chamber. The crank connecting rod mechanism 114 is at least partially arranged in the combustion chamber, and the ignition mechanism 115 is at least partially arranged in the combustion chamber. The ignition mechanism 115 ignites the mixed gas and outputs the driving force of the engine 11 through the crank connecting rod mechanism 114.

[0032] The engine 11 is arranged in a transverse arrangement. Specifically, the crank-connecting rod mechanism 114 includes a crankshaft 1141, which extends substantially in the left-right direction. The engine 11 also includes a magneto 118, which can be driven by the crankshaft 1141 for power generation. The transmission system includes a transmission shaft (not shown), the clutch 12 includes a clutch assembly 121 and a clutch housing 122, the reduction box 13 includes a reduction assembly 131 and a reduction box housing 132, the magneto 118 is arranged at one end of the crankshaft 1141, the other end of the crankshaft 1141 is transmission-connected to one end of the clutch assembly 121, the other end of the clutch assembly 121 is transmission-connected to one end of the reduction assembly 131, and the other end of the reduction assembly 131 is transmission-connected to the travel assembly 25 via a transmission shaft. The clutch housing 122, the reduction box housing 132 and the housing 111 are at least partially integrated, that is, the clutch housing 122 is at least partially integrally formed or fixedly connected with the housing 111, and the reduction box housing 132 is at least partially integrally formed or fixedly connected with the housing 111. The clutch housing 122 and the reduction box housing 132 are integrally formed or fixedly connected, so that the crankshaft 1141 can extend out of the housing 111 and directly drive connected to the clutch assembly 121, and the clutch assembly 121 can directly drive connected to the reduction assembly 131. This arrangement reduces the occupied space of the engine 11 and the transmission system, makes the transmission structure simple and has fewer parts, so that the layout structure of the engine 11 and the transmission system is compact, and improves space utilization and transmission efficiency. The travel assembly 25 includes a front wheel assembly 251, and the reduction box 13 also includes a spline shaft 133, one end of the spline shaft 133 is drive connected to the reduction assembly 131, and the other end of the spline shaft 133 is drive connected to the transmission shaft and is drive connected to the front wheel assembly 251 through the transmission shaft, so that the engine 11 can be drive connected to the front wheel assembly 251. The axis of the spline shaft 133 extends substantially in the front-rear direction, so that the arrangement of the spline shaft 133 can be adapted to the structure of the engine 11, the clutch 12 and the reduction box 13 provided in the present application, further saving the arrangement space of the all-terrain vehicle 200. The travel assembly 25 also includes a rear wheel assembly 252 and a rear axle, the rear wheel assembly 252 and the rear axle are transmission-connected, the reduction box housing 132 is provided with a reduction box 13 through hole, the rear axle is penetrated in the reduction box 13 through hole and is transmission-connected to the reduction assembly 131, so that the engine 11 can be transmission-connected to the rear wheel assembly 252. In this embodiment, the valve mechanism 112 also includes a supercharging assembly 1121, and the supercharging assembly 1121 can make the intake volume of the engine 11 greater than or equal to 650 kg / h and less than or equal to 750 kg / h. As an implementation method, the supercharging assembly 1121 can make the intake volume of the engine 11 reach 726 kg / h.Under such intake volume, the fuel injection volume of the engine 11 reaches 70 kg / h. Under such settings, the speed of the crankshaft 1141 of the engine 11 is greater than or equal to 8000 r / min and less than about 9000 r / min, and the specific power of the engine 11 is greater than or equal to 150 kw / L and less than or equal to 160 kw / L, so that a strong driving force can be output, so that the all-terrain vehicle 200 equipped with the engine 11 has stronger power and can adapt to more complex road conditions. In addition, through the above settings, the overall structure of the power assembly 100 is more compact, and it can be better assembled on the all-terrain vehicle 200, making the structure of the all-terrain vehicle 200 more compact.

[0033] like Figures 4 to 5 As shown, the air intake assembly 1122 includes an air duct 1122a and a wavelength tube 1122b, the wavelength tube 1122b is arranged in the air duct 1122a, the air duct 1122a is connected to the external space and the filter assembly 1124, and the wavelength tube 1122b is used to reduce the noise in the air duct 1122a, thereby improving noise interference and improving the comfort of the all-terrain vehicle 200. The other end of the filter assembly 1124 is also connected to the pipeline of the air intake assembly 1122 away from the air duct 1122a, and continuously delivers air to the pipeline of the air intake assembly 1122 after filtering out impurities such as dust and moisture in the air.

[0034] Specifically, the wavelength tube 1122b and the air duct 1122a are arranged to be integrally formed, and this arrangement facilitates the production of the air duct 1122a and the wavelength tube 1122b. The wavelength tube 1122b includes a first part 1122ba and a second part 1122bb. The first part 1122ba and the second part 1122bb are arranged to be an integrally formed structure, and the extension direction of the first part 1122ba is substantially perpendicular to the extension direction of the second part 1122bb to reduce the occupied space of the wavelength tube 1122b in the vertical direction. As an optional embodiment, an arc-shaped transition structure 1122bc can be arranged between the first part 1122ba and the second part 1122bb, so as to facilitate the refraction of sound waves in the wavelength tube 1122b. One end of the wavelength tube 1122b is connected to the air duct 1122a, and the air duct 1122a connects one end of the wavelength tube 1122b and the external space. The other end of the wavelength tube 1122b is integrally formed with the air duct 1122a, that is, the other end of the wavelength tube 1122b is closed. After the sound wave enters the wavelength tube 1122b from the air duct 1122a, it is reflected by the closed end of the wavelength tube 1122b and cancels out the sound wave with the same frequency and opposite phase in the wavelength tube 1122b, thereby achieving the purpose of silencing and noise reduction.

[0035] The air duct 1122a is provided with a reinforcement structure 1122aa, which can improve the strength of the air duct 1122a. The air duct 1122a is also provided with an air inlet 1122ab and a filter valve 1122ac. Along the up-down direction of the engine 11, the air inlet 1122ab is provided at the upper end of the air duct 1122a, and the filter valve 1122ac is provided at the lower end of the air inlet duct. The reinforcement structure 1122aa is provided between the air inlet 1122ab and the filter valve 1122ac, and the reinforcement structure 1122aa basically extends from the air inlet 1122ab to the filter valve 1122ac. After the air enters the air duct 1122a from the air inlet 1122ab, the reinforcement structure 1122aa can guide the air to the filter valve 1122ac, and impurities such as dust and moisture in the air are discharged from the air duct 1122a through the filter valve 1122ac, thereby reducing the workload of the oil filter 11c filter assembly 1124. As an optional embodiment, the filter valve 1122ac is arranged on the lower side of the wavelength tube 1122b away from the closed end of the wavelength tube 1122b. This arrangement enables the reinforcement structure 1122aa to guide the transmission of air while also guiding the conduction of sound waves, thereby facilitating the introduction of sound waves into the wavelength tube 1122b, thereby improving the noise reduction performance of the wavelength tube 1122b. A guide structure 1122ad is also provided in the air duct 1122a. The guide structure 1122ad is provided at the lower side of the closed end of the wavelength tube 1122b. The guide structure 1122ad extends substantially along the direction from the filter valve 1122ac to the reinforcement structure 1122aa. The guide structure 1122ad is inclined toward the side away from the filter valve 1122ac, and the wavelength tube 1122b and the filter valve 1122ac are provided at the same side of the guide structure 1122ad. The reinforcement structure 1122aa, the filter valve 1122ac and the guide structure 1122ad divide the air duct 1122a into an input space 1122ae, a filter space 1122af and an output space 1122ag, and a guide channel 1122ah is formed between the air inlet 1122ab and the filter valve 1122ac through the reinforcement structure 1122aa. The input space 1122ae is connected to the outside world, and the air and sound waves in the input space 1122ae are guided to the filter space 1122af and the wavelength tube 1122b through the guide channel 1122ah. The air flows to the output space 1122ag after filtering impurities through the filter valve 1122ac, and the sound waves enter the wavelength tube 1122b for noise reduction. A gap 1122ak is provided between the reinforcement structure 1122aa and the guide structure 1122ad, and the gap 1122ak connects the filter space 1122af and the output space 1122ag, and the output space 1122ag connects the filter assembly 1124 of the oil filter 11c.Through the above arrangement, impurities and sound waves in the air can more easily enter the filter valve 1122ac and the wavelength tube 1122b, thereby improving the filtering performance of the filter valve 1122ac and the noise reduction performance of the wavelength tube 1122b.

[0036] like Figure 6 to Figure 7As shown, the filter assembly 1124 includes a first housing 1124a, a second housing 1124b and a filter element 1124c. The first housing 1124a and the second housing 1124b are detachably connected, and a first accommodating space 1124d is formed between the first housing 1124a and the second housing 1124b. The filter element 1124c is disposed in the first accommodating space 1124d, and the filter element 1124c is used to filter out dust and other impurities in the air. Connectors 1124e are disposed on the first housing 1124a and the second housing 1124b, and the connectors 1124e are at least partially disposed in a blind spot, i.e., a position that cannot be directly seen during assembly. The first housing 1226 is provided with a first positioning member 1124ab, and the second housing is provided with a second positioning member 1124bc. The first housing 1124a includes a first position and a second position. When the first positioning member 1124ab and the second positioning member 1124bc are in a matching position, the first housing 1124a and the second housing 1124b are detachably connected through the connecting member 1124e. Specifically, the first housing 1124a is provided with a first buckle 1124ac, and the second housing 1124b is provided with a second buckle 1124bd. The first buckle 1124ac and the second buckle 1124bd are engaged. This arrangement facilitates the connection and disassembly of the first housing 1124a and the second housing 1124b, and improves the convenience of assembly and maintenance of the filter assembly 1124. The first positioning member 1124ab is arranged on the edge of the first housing 1124a, the second positioning member 1124bc is arranged on the edge of the second housing 1124b, and the first positioning member 1124ab and the second positioning member 1124bc are arranged at the connection between the first housing 1124a and the second housing 1124b. When the first positioning member 1124ab and the second positioning member 1124bc can abut or engage, the first housing 1124a is in the first position, at which time the first buckle 1124ac can be engaged with the second buckle 1124bd; when the first positioning member 1124ab cannot abut or engage with the second positioning member 1124bc, the first housing 1124a is in the second position, at which time the first buckle 1124ac cannot be engaged with the second buckle 1124bd. That is, when the first positioning member 1124ab can cooperate with the second positioning member 1124bc, the first housing 1124a and the second housing 1124b are in a position where they can be engaged. The first positioning member 1124ab can be set as a limiting hole, and the second positioning member 1124bc can be set as a limiting key. Of course, the first positioning member 1124ab can also be set as a limiting key, and the second positioning member 1124bc can also be set as a limiting hole. This arrangement determines the installation position of the first shell 1124a and the second shell 1124b through the first positioning member 1124ab and the second positioning member 1124bc, thereby facilitating the connection between the first shell 1124a and the second shell 1124b, and further improving the convenience and accuracy of the assembly and maintenance of the filter assembly 1124.

[0037] like Figure 8 As shown, in this embodiment, the intake manifold 1128 includes an intake end 1128a, an outlet end 1128b and a pressure stabilizing chamber 1128c. Among them, the intake end 1128a is connected to the intake assembly 1122, and the outlet end 1128b is connected to the cylinder head 1112. The pressure stabilizing chamber 1128c is at least partially arranged between the intake end 1128a and the outlet end 1128b. As an implementation method, the intake direction of the intake end 1128a is set to a first direction. Along the first direction, the pressure stabilizing chamber 1128c extends to a preset length and is formed with an extension 1128ca. It can be understood that the length of the pressure stabilizing chamber 1128c extending along the first direction is greater than the width occupied by the outlet end 1128b along the first direction. In this embodiment, the outlet end 1128b includes a first outlet 1128ba, a second outlet 1128bb and a third outlet 1128bc. Among them, the first air outlet 1128ba is arranged at an end close to the air inlet end 1128a, the third air outlet 1128bc is arranged at an end away from the first air outlet 1128ba, and the second air outlet 1128bb is arranged between the first air outlet 1128ba and the third air outlet 1128bc. As an implementation method, the extension portion 1128ca extends to an end away from the first air outlet 1128ba and the third air outlet 1128bc. Through such a setting, the pressure stabilizing chamber 1128c can reduce the air flow resistance caused by the intermittent air intake of the intake manifold 1128, and improve the air intake capacity of the engine 11. The pressure stabilizing chamber 1128c at least partially protrudes outward to form a mounting seat 1128cb, and a detection member 1128cc is arranged on the mounting seat 1128cb and the detection member 1128cc and the mounting seat 1128cb are fixedly connected, and the detection member 1128cc is used to detect the temperature and pressure of the gas in the pressure stabilizing chamber 1128c. After the detection member 1128cc at least partially passes through the connection between the mounting seat 1128cb and the pressure stabilizing chamber 1128c, at least partially it is arranged in the pressure stabilizing chamber 1128c. The extension direction of the portion of the detection member 1128cc arranged in the pressure stabilizing chamber 1128c is set to the second direction. The extension direction of the normal of the pressure stabilizing chamber 1128c at the connection between the mounting seat 1128cb and the pressure stabilizing chamber 1128c is set to the third direction. The angle between the second direction and the third direction is set to be greater than or equal to 40° and less than or equal to 50°. This arrangement can eliminate the influence of the intake manifold 1128 on the detection member 1128cc detection member 1128cc, and improve the stability, accuracy and reliability of the detection member 1128cc detection member 1128cc. As an optional embodiment, the angle between the second direction and the third direction can also be set to be greater than or equal to 42° and less than or equal to 48°, and the angle between the second direction and the third direction can also be set to be greater than or equal to 44° and less than or equal to 46°.

[0038] It can be understood that the first air outlet 1128ba, the second air outlet 1128bb and the third air outlet 1128bc are respectively connected to the pressure stabilizing chamber. This arrangement allows the gas to be mixed in the pressure stabilizing chamber before being discharged from each air outlet, thereby improving the degree of oil-gas mixing, thereby improving the smoothness and intake volume of the engine 11.

[0039] As an implementation, the all-terrain vehicle 200 further includes a carbon tube 27, one end of which is connected to the carbon canister 28 in the fuel tank, and the other end of the carbon tube 27 is connected to the intake manifold 1128. Specifically, the carbon tube 27 is connected to the intake end 1128a of the intake manifold 1128. As an implementation, the intake end 1128a of the intake manifold 1128 is also provided with an air vent 1128aa, and the air vent 1128aa is integrally formed with the intake manifold 1128. The carbon tube 27 is connected to the air inlet, and can transport the fuel vapor in the carbon canister 28 to the intake manifold 1128, and after being fully mixed in the pressure stabilizing chamber, it flows into the first air outlet 1128ba, the second air outlet 1128bb and the third air outlet 1128bc. It can be understood that the amount of fuel injected into the combustion chamber of the engine 11 is the amount of fuel calculated strictly according to the current state. The fuel vapor input from the carbon tube 27 will increase the amount of fuel in the combustion chamber. When it exceeds the preset amount, it will cause incomplete combustion, thereby causing carbon deposition and damaging the cylinder block 1113. By connecting the carbon tube 27 to the air inlet of the intake manifold 1128, the fuel vapor is fully mixed in the pressure stabilizing chamber and then flows into the first air outlet 1128ba, the second air outlet 1128bb and the third air outlet 1128bc respectively. At this time, the increased fuel vapor is evenly distributed to each combustion chamber, so that the sudden increase in the amount of fuel in a single combustion chamber can be avoided, resulting in incomplete combustion and a large amount of carbon deposition, which damages the stability of the engine 11. Through such a setting, the consistency of the intake flow of the engine 11 is guaranteed, and the consistency of the combustion of each combustion chamber is improved, thereby ensuring the consistency of the state of each combustion chamber of each cylinder, and improving the stability and service life of the engine 11.

[0040] like Figures 9 to 12As shown, since the intake manifold 1128k is connected to the intake assembly 1122 and the cylinder head 1112, under the movement of the crank-connecting rod mechanism 114, compared with the intake assembly 1122, the intake manifold 1128k is subjected to a larger pressure value and the pressure on the intake manifold 1128k changes faster, the wall thickness of the intake manifold 1128k is set to be greater than or equal to 2 mm and less than or equal to 4 mm, and the wall thickness of the intake assembly 1122 is set to be greater than or equal to 1.5 mm and less than or equal to 3.5 mm. This setting method further simplifies the structure of the intake assembly 1122 while ensuring the strength of the intake assembly 1122, thereby making the engine 11 lighter and saving manufacturing costs. As an optional embodiment, the wall thickness of the intake manifold 1128k is set to be greater than or equal to 2.5 mm and less than or equal to 3.5 mm, and the wall thickness of the intake assembly 1122 is set to be greater than or equal to 2 mm and less than or equal to 3 mm. Specifically, the wall thickness of the intake manifold 1128k can be set to 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm, and the wall thickness of the intake component 1122 can be set to 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm, etc.

[0041] A reinforcement structure 1128d is provided on the outer surface of the intake manifold 1128e. The reinforcement structure 1128d is used to improve the strength of the intake manifold 1128e, so that the intake manifold 1128e can withstand a large airflow pressure, while also ensuring the sealing and safety of the intake manifold 1128e. Specifically, the reinforcement structure 1128d includes a first reinforcement structure 1128da and a second reinforcement structure 1128db. The symmetry plane of the first reinforcement structure 1128da extends substantially along the first direction, and the symmetry plane of the second reinforcement structure 1128db extends substantially along the second direction. The first direction and the second direction are substantially perpendicularly arranged, that is, the first reinforcement structure 1128da and the second reinforcement structure 1128db are arranged in a grid shape on the surface of the intake manifold 1128e. Specifically, the first reinforcement structure 1128da is substantially arranged along the up-down direction, and the second reinforcement structure 1128db is substantially arranged along the left-right direction. This arrangement enables the first reinforcement structure 1128da and the second reinforcement structure 1128db to be arranged substantially along the direction of the airflow in the intake manifold 1128e, effectively improving the reinforcement function of the first reinforcement structure 1128da and the second reinforcement structure 1128db on the intake manifold 1128e. It can be understood that the arrangement of the first reinforcement structure 1128da and the second reinforcement structure 1128db is not limited to the left-right direction and the up-down direction. As long as the first reinforcement structure 1128da and the second reinforcement structure 1128db are arranged in a grid shape on the outer surface of the intake manifold 1128e, the technical solution is within the protection scope of this application. Further, the shortest distance between two adjacent first reinforcement structures 1128da is set to L1, and L1 is set to be greater than or equal to 15mm and less than or equal to 30mm. The shortest distance between two adjacent second reinforcement structures 1128db is set to L2, and L2 is set to be greater than or equal to 18mm and less than or equal to 22mm. Through the above-mentioned setting, the sizes of the first reinforcement structure 1128da and the second reinforcement structure 1128db are suitable for engines 11 of different sizes and specifications, thereby improving the applicability of the first reinforcement structure 1128da and the second reinforcement structure 1128db. As an optional embodiment, L1 is set to be greater than or equal to 18 and less than or equal to 27mm, or L1 is set to be greater than or equal to 21 and less than or equal to 24mm, wherein L1 can be set to 15mm, 20mm, 25mm or 30mm, etc.; L2 is set to be greater than or equal to 19mm and less than or equal to 21mm, wherein L2 can be set to 18mm, 19mm, 20mm, 21mm or 22mm, etc. The height of the first reinforcement structure 1128d is set to be greater than or equal to 3mm and less than or equal to 7mm, and the height of the second reinforcement structure 1128d is set to be greater than or equal to 3mm and less than or equal to 7mm.The height of the first reinforcement structure 1128d is the maximum distance from the surface of the intake manifold 1128 to the surface of the first reinforcement structure 1128d away from the intake manifold 1128, and the height of the second reinforcement structure 1128d is the maximum distance from the surface of the intake manifold 1128 to the surface of the second reinforcement structure 1128d away from the intake manifold 1128. The thickness of the first reinforcement structure 1128d is set to be greater than or equal to 2 mm and less than or equal to 3.5 mm, and the thickness of the second reinforcement structure 1128d is set to be greater than or equal to 2 mm and less than or equal to 3.5 mm. Through the above setting, the size of the reinforcement structure 1128d is suitable for engines 11 of different sizes and specifications, thereby improving the applicability of the reinforcement structure 1128d. As an optional embodiment, L1 can be set to 3 mm, 4 mm, 5 mm, 6 mm or 7 mm, etc., and L2 can be set to 2 mm, 2.5 mm, 3 mm or 3.5 mm, etc. The intake manifold 1128 is made of a rigid material, wherein, based on the improvement of the strength of the intake manifold 1128 by the reinforcement structure 1128d, the intake manifold 1128 can be set to plastic, and the wall thickness of the intake manifold 1128 is set to be greater than or equal to 2.5 mm and less than or equal to 3 mm. This arrangement reduces the weight of the engine 11, makes the engine 11 easier to install and is conducive to achieving lightweight vehicles; at the same time, this arrangement uses more easily available plastic as the manufacturing material of the intake manifold 1128, reducing the manufacturing cost of the engine 11.

[0042] The intake manifold 1128 is provided with a flange 1128e, and the flange 1128e and the intake manifold 1128 are fixedly connected or integrally formed. The intake manifold 1128 is fixedly connected to the cylinder head 1112 or the cylinder block 1113 through the flange 1128e. The connection surface of the flange 1128e is at least partially recessed inward, and a reinforcement structure 1128ea is formed at the recessed portion. This arrangement can reduce the weight of the flange while ensuring the strength of the flange 1128e. Further, as an optional embodiment, the thickness of the flange 1128e can be set to be greater than or equal to 2 mm and less than or equal to 4 mm, or the thickness of the flange 1128e can also be set to be greater than or equal to 2.4 mm and less than or equal to 3.6 mm, or the thickness of the flange 1128e can also be set to be greater than or equal to 2.8 mm and less than or equal to 3.2 mm. Among them, the thickness of the flange 1128e can be set to 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm, etc. The intake manifold 1128 extends along a preset straight line direction, and the flange 1128e includes a plurality of connection parts, and the connection parts are distributed in an "M" or "W" shape along the preset straight line direction. In the present application, the flange 1128e includes a first connection part 1128eb and a second connection part 1128ec, and the fasteners fix the flange 1128e to the cylinder block 1113 through the first connection part 1128eb and the second connection part 1128ec. The first connection part 1128eb and the flange 1128e are integrally formed, and the second connection part 1128ec and the flange 1128e are integrally formed, and the first connection part 1128eb and the second connection part 1128ec are both arranged between the intake manifold 1128 and the cylinder block 1113. Along the extension direction of the flange diagonal line, the first connection portion 1128eb is arranged at one end of the flange 1128e, the second connection portion 1128ec is arranged at the other end of the flange 1128e, and the first connection portion 1128eb and the second connection portion 1128ec are alternately arranged in sequence between the intake manifold 1128. This arrangement reduces the number of fasteners while ensuring the connection strength of the flange 1128e, thereby improving the convenience of connecting the intake manifold 1128 to the housing 111 and the intake manifold 1128 to the throttle assembly 1127 and saving costs.

[0043] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. An all-terrain vehicle comprising: Frame; a body covering, the body covering being at least partially disposed on the vehicle frame; An engine, the engine comprising an air intake assembly and an oil filter, wherein the air intake assembly is provided with an air duct for air intake; A traveling assembly, the traveling assembly being transmission-connected to the engine; It is characterized in that The air duct is provided with a reinforcement structure, a filter valve and a guide structure, and the reinforcement structure, the filter valve and the guide structure divide the air duct into an input space, a filter space and an output space, the input space is connected to the outside, the output space is connected to the oil filter, and the air in the input space is guided to the filter space through the reinforcement structure and the guide structure, and the filter space is connected to the filter valve.

2. The all-terrain vehicle according to claim 1, characterized in that: The air duct is provided with an air inlet, the air inlet is arranged at one end of the air duct, and the filter valve is arranged at the other end of the air duct.

3. The all-terrain vehicle according to claim 2, characterized in that: The reinforcement structure is disposed between the filter valve and the air inlet.

4. The all-terrain vehicle according to claim 3, characterized in that: The reinforcement structure substantially extends along a direction from the air inlet to the filter valve.

5. The all-terrain vehicle according to claim 4, characterized in that: The guide structure basically extends along the direction from the filter valve to the reinforcement structure, and a gap connecting the filter space and the output space is provided between the guide structure and the reinforcement mechanism.

6. The all-terrain vehicle according to claim 5, characterized in that: A wavelength tube is arranged on the upper side of the filter valve, and the wavelength tube and the filter valve are arranged on the same side of the guide structure.

7. The all-terrain vehicle according to claim 6, characterized in that: The air duct and the wavelength tube are integrally formed, the air duct is connected to one end of the wavelength tube and the external space respectively, and the other end of the wavelength tube away from the filter valve is closed.

8. The all-terrain vehicle according to claim 7, characterized in that: The wavelength tube comprises a first part and a second part, and an extending direction of the first part and an extending direction of the second part are substantially perpendicular to each other.

9. The all-terrain vehicle according to claim 8, characterized in that: A transition structure is provided between the first part and the second part.

10. The all-terrain vehicle according to claim 9, characterized in that: The transition structure is arranged in an arc shape.

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