CN220646064U - All-terrain vehicle - Google Patents

Abstract

The utility model discloses an all-terrain vehicle which comprises a frame, an engine, a transmission assembly and a walking assembly. The engine is supported by the frame and includes an outer housing and a cooling water jacket disposed within the outer housing. The transmission assembly is supported by the frame and drivingly connected to the engine. The walking assembly is arranged on the lower side of the frame and connected to the transmission assembly in a transmission way. The outer shell is provided with an exhaust port communicated with the cooling water jacket and the outside. The engine further comprises a fastener arranged in the exhaust port, the fastener is connected with the exhaust port, an exhaust groove is formed in the fastener, the fastener comprises a sealing state and an exhaust state, when the fastener is in the sealing state, the exhaust port is isolated from the outside through the fastener, and when the fastener is in the exhaust state, the exhaust groove is communicated with the exhaust port and the outside. With the above arrangement, the cooling efficiency of the engine can be improved.

Description

All-terrain vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to an all-terrain vehicle.

Background

In the existing engine, a cooling water jacket is designed in a cylinder head and a cylinder body, and cooling liquid is filled in the cooling water jacket. The cooling liquid is driven to circulate in the engine by a water pump in the engine, so that the engine is cooled.

In the process of manually filling the cooling liquid, air can enter the cooling water jacket, excessive gas in the cooling water jacket cannot be discharged, the excessive air can occupy the space of the cooling water jacket, and the space can enable the cooling liquid to be unable to be distributed over the whole cooling water jacket. In an engine operating state, the above-described space may cause incomplete engine cooling, thereby degrading the cooling efficiency of the engine.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide an all-terrain vehicle, and the engine of the all-terrain vehicle has higher cooling efficiency.

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

an all-terrain vehicle comprises a vehicle frame, an engine, a transmission assembly and a traveling assembly. The engine is supported by the frame and includes an outer housing and a cooling water jacket disposed within the outer housing. The transmission assembly is supported by the frame and drivingly connected to the engine. The walking assembly is arranged on the lower side of the frame and connected to the transmission assembly in a transmission way. The engine further comprises a fastening piece arranged in the air outlet, the fastening piece is connected with the air outlet, an air outlet groove is formed in the fastening piece, the fastening piece comprises a sealing state and an air outlet state, when the fastening piece is in the sealing state, the air outlet is isolated from the outside through the fastening piece, and when the fastening piece is in the air outlet state, the air outlet groove is communicated with the air outlet and the outside.

Further, the fastener comprises a sealing end and a connecting end, the exhaust groove is arranged on the connecting end, when the fastener is in a sealing state, the connecting end and the exhaust groove are both positioned in the exhaust port, and the sealing end is abutted with the outer edge of the exhaust port; when the fastener is in the venting state, the connecting end and the venting groove are at least partially located outside the vent, and the sealing end is separated from the outer edge of the vent.

Further, the engine further comprises a sealing element, the sealing element is sleeved on the connecting end, and when the fastening element is in a sealing state, the sealing element is respectively abutted to the sealing end and the outer edge of the exhaust port.

Further, the connecting end is in threaded connection with the exhaust port.

Further, the length of the air vent groove along the extending direction of the connecting end is basically consistent with the length of the connecting end along the extending direction of the connecting end.

Further, the extending directions of the exhaust port, the connecting end and the exhaust groove are basically consistent.

Further, the exhaust port is provided on the upper side of the uppermost end of the cooling water jacket.

Further, the engine further includes an exhaust passage for exhaust gas when the engine is in an operating state, and the exhaust port is provided on and communicates with the exhaust passage.

Further, the exhaust port is at least partially provided at an upper side of the exhaust passage.

Further, the outer housing includes a cylinder head with the exhaust port located thereon.

According to the all-terrain vehicle, when the cooling liquid is manually filled, redundant gas in the cooling water jacket is discharged to the outside through the exhaust groove on the fastening piece, so that the cooling water jacket can sufficiently cool parts in the outer shell, the cooling efficiency of the engine is improved, and the working efficiency and the working stability of the engine are improved.

Drawings

Fig. 1 is a schematic structural view of an all-terrain vehicle of the present application.

FIG. 2 is a schematic diagram of the powertrain and air filter of the ATV of the present application.

Fig. 3 is a schematic structural view of an engine of the all-terrain vehicle of the present application.

Fig. 4 is a partial schematic structural view of an engine casing of the all-terrain vehicle of the present application.

FIG. 5 is a schematic view of the engine fastener and seal of the ATV of the present application.

Fig. 6 is a structural side view of the reduction gearbox of the all-terrain vehicle of the present application.

Fig. 7 is a cross-sectional view of a reduction gearbox of the all-terrain vehicle of the present application.

Fig. 8 is a partial enlarged view of fig. 7 a of the present application.

Fig. 9 is a schematic partial structure of a reduction gearbox of the all-terrain vehicle of the present application.

Fig. 10 is a partial enlarged view at B in fig. 6 of the present application.

Fig. 11 is a structural exploded view of an air filter of the all-terrain vehicle of the present application.

Fig. 12 is a structural cross-sectional view of an air filter of the all-terrain vehicle of the present application.

Fig. 13 is a partial enlarged view of fig. 12C of the present application.

Detailed Description

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

An all-terrain vehicle 100 is shown in fig. 1 and 2, the all-terrain vehicle 100 including a frame 11, a powertrain 12, a drive train 13, a travel assembly 14, and a suspension assembly 15. Wherein frame 11 serves as the basic frame of ATV 100 for supporting frame 11, powertrain 12, drivetrain 13, travel assembly 14, and suspension assembly 15. Powertrain 12 includes an engine 121, engine 121 being at least partially disposed on frame 11 and in driving connection with drive train 13. The transmission system 13 is also in transmission connection with the walking assembly 14. Suspension assembly 15 is used to connect walking assembly 14 to frame 11. For clarity of explanation of the technical scheme of the present utility model, front, rear, left, right, up and down are also defined as shown in fig. 1. In the present application, the front-rear direction refers to the longitudinal direction of the all-terrain vehicle 100, the left-right direction refers to the width direction of the all-terrain vehicle 100, and the up-down direction refers to the height direction of the all-terrain vehicle 100.

Specifically, at least a portion of the travel assembly 14 is disposed on the underside of the frame 11, the travel assembly 14 includes a front wheel 141 and a rear wheel 142, and the drive train 13 is drivingly connected to at least one of the front wheel 141 and the rear wheel 142 to enable the engine 121 to be drivingly connected to at least one of the front wheel 141 and the rear wheel 142 to drive movement of the ATV 100. Suspension assembly 15 is used to connect front wheel 141 and rear wheel 142 to frame 11.

As shown in fig. 3, specifically, the engine 121 includes an outer housing 1211, a crank mechanism 1212, a piston mechanism 1213, a valve train 1214, an ignition mechanism 1215, and an intake and exhaust mechanism 1216. Wherein, an accommodation space is formed in the outer shell 1211, and a crank-link mechanism 1212, a piston mechanism 1213, a valve train 1214, an ignition mechanism 1215 and an air intake and exhaust mechanism 1216 are all arranged in the accommodation space. In the present embodiment, the outer case 1211 includes a cylinder head cover 1211a, a cylinder head 1211b, a cylinder block 1211c, a crankcase 1211d, and an oil pan 1211e. The cylinder head cover 1211a and the cylinder head 1211b are connected to form a first accommodation space, and the ignition mechanism 1215, the valve train 1214, and the intake/exhaust mechanism 1216 are at least partially disposed in the first accommodation space. The cylinder block 1211c is integrally formed with or fixedly connected to the upper case of the crank case 1211d, the lower case of the crank case 1211d is fixedly connected to the upper case of the crank case 1211d, a second accommodation space is formed in the cylinder block 1211c, and the piston mechanism 1213 is at least partially disposed in the second accommodation space. A third accommodation space is formed in the crank case 1211d, and the crank-link mechanism 1212 is at least partially disposed in the third accommodation space.

In the case where the engine 121 is operated, fuel and air are mixed to form a combustible mixture and then supplied to a combustion chamber of the engine 121, the combustible mixture in the combustion chamber is ignited by the ignition mechanism 1215, and a large amount of heat is released after the combustion of the combustible mixture, and the pressure and temperature of the fuel gas in the cylinder block 1211c are rapidly increased, thereby driving the piston mechanism 1213 to move. Wherein the combustion chamber of the engine 121 is constituted by the bottom of the cylinder head 1211b and the top of the cylinder block 1211 c. The crank mechanism 1212 is connected to the piston mechanism 1213, and movement of the piston mechanism 1213 can drive the crank mechanism 1212 to move, the crank mechanism 1212 drivingly connected to at least one of the front and rear wheels 141, 142, thereby outputting power to at least one of the front and rear wheels 141, 142 via the crank mechanism 1212. The valve mechanism 1214 is in transmission connection with the crank link mechanism 1212, the valve mechanism 1214 is abutted with the air inlet and outlet mechanism 1216, and the movement of the crank link mechanism 1212 can also drive the valve mechanism 1214 to move, so that the valve mechanism 1214 can control the air inlet and outlet of the air inlet and outlet mechanism 1216. With the above arrangement, normal operation of the engine 121 can be achieved.

As shown in fig. 3, 4 and 5, as one implementation, the engine 121 includes a cooling water jacket 1217, the cooling water jacket 1217 is at least partially disposed in the outer casing 1211, and the cooling water jacket 1217 is used to cool a combustion chamber of the engine 121, thereby implementing cooling of the engine 121, which is beneficial to normal operation of the engine 121.

Specifically, an exhaust port 1211f is formed on the outer case 1211, and the exhaust port 1211f is used to communicate the cooling water jacket 1217 with the outside. The engine 121 further includes a fastener 1218, the fastener 1218 being at least partially disposed in the exhaust port 1211f, the fastener 1218 also being coupled to the exhaust port 1211 f. Wherein the fastener 1218 is provided with a vent slot 1218a.

The fastener 1218 includes a sealed state and an exhausted state, the exhaust port 1211f is isolated from the outside by the fastener 1218 when the fastener 1218 is in the sealed state, and the exhaust slot 1218a communicates with the exhaust port 1211f and the outside when the fastener 1218 is in the exhausted state. As an alternative implementation, the fastener 1218 may be configured as a bolt with a vent slot 1218a, such that when the fastener 1218 is in a sealed condition, the fastener 1218 and the vent 1211f are threadably coupled, thereby preventing the vent 1211f from communicating with the outside world to prevent the flow of coolant from the vent 1211f during normal operation of the engine 121; when the fastener 1218 is in the air-releasing state, the fastener 1218 is loosened to allow the air-releasing grooves 1218a of the fastener 1218 to communicate with the outside, thereby allowing the excess air in the cooling water jacket 1217 to be discharged through the air-releasing grooves 1218a when the cooling liquid in the cooling water jacket 1217 is manually filled.

With the above arrangement, when the cooling liquid in the cooling water jacket 1217 is manually filled, the cooling liquid in the cooling water jacket 1217 can be fully distributed in the cooling water jacket 1217, so that an air stagnation area in the cooling water jacket 1217 caused by redundant gas in the cooling water jacket 1217 is prevented, and therefore, the cooling liquid in the cooling water jacket 1217 can sufficiently cool parts in the outer shell 1211, further, the cooling efficiency of the engine 121 is improved, and the working efficiency and the working stability of the engine 121 are improved.

Note that, when the cooling liquid in the cooling water jacket 1217 is manually filled, the excessive gas cannot be discharged, and thus, the excessive air occupies the space of the cooling water jacket 1217, which may prevent the cooling liquid from being distributed over the entire cooling water jacket 1217. The above-described air stagnation region means that the excessive air occupies the space of the cooling water jacket 1217. In addition, through the arrangement, the exhaust structure of the cooling water jacket 1217 can be integrally arranged on the fastener 1218, so that redundant exhaust structures are saved, the structure of the engine 121 is simpler, the space utilization rate of the engine 121 is improved, and the structural compactness of the engine 121 is improved.

Specifically, the fastener 1218 includes a sealed end 1218b and a connection end 1218c, with a vent slot 1218a disposed on the connection end 1218 c. Wherein when the fastener 1218 is configured as a bolt, the connecting end 1218c may be a threaded shank of the bolt with external threads and the sealing end 1218b may be a head of the bolt. When the fastener 1218 is in a sealed state, both the connection end 1218c and the vent slot 1218a are positioned in the vent 1211f, with the sealed end 1218b abutting against the outer edge of the vent 1211 f; when the fastener 1218 is in the vented condition, the connecting end 1218c and the vent slot 1218a are at least partially positioned outside the vent 1211f, and the sealed end 1218b is separated from the outer edge of the vent 1211 f. More specifically, the outer case 1211 extends at least partially away from the outer case 1211 to form an extension, and the exhaust port 1211f is provided in the extension of the outer case 1211. The outer edge of the exhaust port 1211f refers to an end surface of an extension of the outer casing 1211 away from one end of the outer casing 1211. With the above arrangement, when the seal end 1218b abuts against the outer edge of the exhaust port 1211f, the coolant in the cooling water jacket 1217 can be prevented from flowing out to the outside through the exhaust port 1211f, thereby improving the sealability of the cooling water jacket 1217 to improve the operational stability of the engine 121. When the connection end 1218c and the exhaust slot 1218a are at least partially located outside the exhaust port 1211f, and the sealing end 1218b is separated from the outer edge of the exhaust port 1211f, the exhaust slot 1218a is communicated with the exhaust port 1211f and the outside, so that when the cooling liquid is manually injected, the redundant air in the cooling water jacket 1217 can be exhausted through the exhaust slot 1218a, so that the cooling liquid in the cooling water jacket 1217 can be fully distributed in the cooling water jacket 1217, the air stagnation area in the cooling water jacket 1217 caused by the redundant air in the cooling water jacket 1217 is prevented, and further, the cooling liquid in the cooling water jacket 1217 can sufficiently cool the components in the outer shell 1211, so that the cooling efficiency of the engine 121 is improved, and the working efficiency and the working stability of the engine 121 are improved.

As an implementation manner, the engine 121 further includes a sealing member 1219, the sealing member 1219 is sleeved on the connecting end 1218c, when the fastening member 1218 is in a sealed state, the sealing member 1219 is respectively abutted against the outer edges of the sealing end 1218b and the exhaust port 1211f, so that the cooling water jacket 1217 is in an isolated state from the outside, the sealing performance of the fastening member 1218 is improved, and further, when the engine 121 is operated, the sealing performance of the engine 121 is further improved, so that the cooling liquid is prevented from flowing out from the cooling water jacket 1217 to the outside, and the cooling effect of the engine 121 is prevented from being reduced due to insufficient cooling liquid, so that the cooling and stable operation of the engine 121 are facilitated.

As one implementation, the connection end 1218c is threadably coupled to the exhaust port 1211f, i.e., the fastener 1218 is threadably coupled to the exhaust port 1211 f. Specifically, the exhaust port 1211f is provided with internal threads, the connection end 1218c is provided with external threads, and the exhaust port 1211f and the connection end 1218c can be screwed. With the above arrangement, the sealing and the exhaust of the cooling water jacket 1217 can be completed by unscrewing or tightening the fastener 1218 without completely removing the fastener 1218, so that the structural compactness of the engine 121 can be improved; meanwhile, the sealing and the exhausting of the cooling water jacket 1217 can be completed under the condition that the fastening piece 1218 is not easy to disassemble, namely, the disassembling and assembling space of the fastening piece 1218 is too small to completely disassemble and assemble the fastening piece 1218. Further, the above arrangement can improve the sealing property of the cooling water jacket 1217 and also improve the exhaust efficiency of the cooling water jacket 1217, thereby preventing the coolant from overflowing while the coolant in the cooling water jacket 1217 is distributed over the cooling water jacket 1217. In addition, the threaded connection may improve the ease of assembly and disassembly of the fastener 1218, thereby further improving the exhaust efficiency of the cooling water jacket 1217.

As one implementation, the length of the air vent slot 1218a along the direction of extension of the connecting end 1218c is substantially identical to the length of the connecting end 1218c along the direction of extension of the connecting end 1218 c. In the present embodiment, the extending direction of the connecting end 1218c, i.e., the axial direction of the fastener 1218, i.e., the axial direction of the bolt. Through the arrangement, the sealing end 1218b can be separated from the outer edge of the exhaust port 1211f, and the exhaust groove 1218a is communicated with the outside, so that the exhaust efficiency of the cooling water jacket 1217 is improved, and the filling efficiency of the engine 121 during manual filling of the cooling liquid is improved. In the present embodiment, the extending directions of the exhaust port 1211f, the connection end 1218c, and the exhaust groove 1218a are substantially identical. It can be appreciated that the length of the air exhaust slot 1218a along the extending direction of the connecting end 1218c may not be identical to the length of the connecting end 1218c along the extending direction of the connecting end 1218c, so that the length of the air exhaust slot 1218a along the extending direction of the connecting end 1218c may be adjusted according to practical requirements, and only the requirement that the air exhaust slot 1218a is communicated with the outside and the cooling water jacket 1217 when the fastener 1218 is unscrewed is satisfied.

As an implementation manner, the exhaust port 1211f is disposed at the upper side of the uppermost end of the cooling water jacket 1217, so that when the cooling liquid is manually filled, the redundant gas in the cooling water jacket 1217 can be discharged out of the cooling water jacket 1217 to the greatest extent, and the existence of the air stagnation area is effectively prevented, so that the cooling of the engine 121 is facilitated, and the working stability of the engine 121 is improved.

As an alternative implementation, the engine 121 further includes an exhaust passage 1211g for exhaust gas when the engine 121 is in an operating state, and the exhaust passage 1211g communicates with the cooling water jacket 1217, thereby facilitating cooling of exhaust gas of the water jacket 1217 when the engine 121 is in an operating state. Among them, the exhaust port 1211f is at least partially provided on the exhaust passage 1211g and communicates with the exhaust passage 1211 g. With the above arrangement, the exhaust structure provided with the cooling water jacket 1217 can be integrated on the exhaust passage 1211g that originally exists, thereby contributing to improvement of the structural compactness of the engine 121. Specifically, the exhaust port 1211f is at least partially disposed on the upper side of the exhaust passage 1211g to facilitate maximum evacuation of excess gas in the cooling water jacket 1217 out of the cooling water jacket 1217.

As an implementation, the exhaust passage 1211g is at least partially disposed on the cylinder head 1211b, that is, the exhaust port 1211f may also be disposed on the cylinder head 1211b, so that the space utilization and the compactness of the cylinder head 1211b may be improved, and thus, the space utilization and the compactness of the engine 121 may be improved.

As shown in fig. 6, as an implementation manner, the transmission system 13 includes a reduction gearbox 131, where the reduction gearbox 131 is filled with lubricating oil, and the lubricating oil is used to reduce wear of components in the reduction gearbox 131 during operation, so as to improve service life of the components in the reduction gearbox 131. Wherein, be provided with observation mechanism 1311 on reducing gear box 131, observation mechanism 1311 adopts transparent material at least partially to make observation mechanism 1311 can observe the lubricating oil liquid level in the reducing gear box 131, thereby can observe the liquid level of lubricating oil in reducing gear box 131 directly perceivedly through observation mechanism 1311, and then can judge whether lubricating oil is in place according to the liquid level of lubricating oil in reducing gear box 131 when supplementing lubricating oil, also can judge whether to need to supplement lubricating oil according to the liquid level of lubricating oil in reducing gear box 131. Specifically, the minimum distance between the observation mechanism 1311 and the bottom of the reduction gearbox 131 in the height direction of the all-terrain vehicle 100 is a first distance L1, the height of the reduction gearbox 131 in the height direction of the all-terrain vehicle 100 is a second distance L2, and the ratio of the first distance L1 to the second distance L2 may be set to 0.24 or more and 0.46 or less. More specifically, the ratio of the first distance L1 and the second distance L2 may be set to 0.28 or more and 0.43 or less. As an alternative implementation, the ratio of the first distance L1 to the second distance L2 may be set to 0.31 or more and 0.39 or less, or the ratio of the first distance L1 to the second distance L2 may be set to 0.35. Wherein, the bottom of the reduction gearbox 131 refers to the bottom of the shell of the reduction gearbox, and the height of the reduction gearbox 131 along the height direction of the all-terrain vehicle 100 refers to the height of the shell of the reduction gearbox 131 along the height direction of the all-terrain vehicle 100. Through the above arrangement, the ratio of the first distance L1 to the second distance L2 can be prevented from being too large or too small to cause that the liquid level of the lubricating oil in the reduction gearbox 131 cannot be observed through the observation mechanism 1311, so that the accuracy of supplementing the lubricating oil and the accuracy of judging whether the lubricating oil needs to be supplemented are improved, that is, the excessive lubrication oil caused by the too large ratio of the first distance L1 to the second distance L2 can be prevented, the resource utilization rate is improved, the too small ratio of the first distance L1 to the second distance L2 can be prevented, the too small lubrication oil is caused, and the lubrication effect of parts in the reduction gearbox 131 is prevented from being reduced due to the too small lubrication oil.

As shown in fig. 7, 8 and 9, as one implementation, the reduction gearbox 131 includes a boss 1312. The observation mechanism 1311 is connected to the boss 1312 and is at least partially disposed in the boss 1312, thereby enabling assembly between the observation mechanism 1311 and the reduction gearbox 131, while also preventing the observation mechanism 1311 from falling out of the reduction gearbox 131.

Specifically, the boss 1312 is formed with a mounting space 1312a and provided with a through hole 1312b. The installation space 1312a is for accommodating the observation mechanism 1311, and the through hole 1312b is capable of communicating the installation space 1312a with the outside. A projection plane perpendicular to the axial direction of the through hole 1312b is defined, the projection of the boss 1312 on the projection plane along the axial direction of the through hole 1312b is a first projection plane, the projection of the through hole 1312b on the projection plane along the axial direction of the through hole 1312b is a second projection plane, and the area of the first projection plane is larger than that of the second projection plane. More specifically, the through hole 1312b and the observation mechanism 1311 overlap at least partially as viewed in the axial direction of the through hole 1312b. Through the above arrangement, the observation mechanism 1311 can observe the lubricating oil in the reduction gearbox 131 through the through hole 1312b, and the observation mechanism 1311 can be always arranged in the boss 1312, so that the observation mechanism 1311 is prevented from falling off from the through hole 1312b to the outside of the reduction gearbox 131, the connection stability of the observation mechanism 1311 and the installation space 1312a is improved, and the connection stability of the observation mechanism 1311 and the boss 1312 is further improved.

As one implementation, an annular groove 1312c is also formed in the boss 1312 _。 The reduction gearbox 131 further comprises a retainer ring 1313, wherein the retainer ring 1313 is at least partially disposed within the annular groove 1312c and is in snap engagement with the annular groove 1312 c. The viewing mechanism 1311 is disposed at least partially between the annular groove 1312c and the through bore 1312b. With the above arrangement, the observation mechanism 1311 can be at least partially disposed between the retainer ring 1313 and the through hole 1312b, so that it can passThe provision of the retainer ring 1313 prevents the observation mechanism 1311 from falling out of the boss 1312, thereby improving the connection stability of the observation mechanism 1311 and the boss 1312.

As shown in fig. 10, in the present embodiment, the boss 1312 includes an indicating portion 1312d, and the indicating portion 1312d is provided on the boss 1312. The indication portion 1312d includes a maximum scale and a minimum scale for indicating the oil level of the lubricating oil, so that it is possible to clearly and intuitively judge whether the lubricating oil is required to be replenished when the oil level of the lubricating oil is too low, and to prevent the lubricating oil from being replenished too much when the lubricating oil is replenished. Specifically, the uppermost end of the observation mechanism 1311 extends substantially along the first plane 1314 perpendicular to the height direction of the all-terrain vehicle 100, the lowermost end of the observation mechanism 1311 extends substantially along the second plane 1315 perpendicular to the height direction of the all-terrain vehicle 100, and the indication portion 1312d is located between the first plane 1314 and the second plane 1315, so that it is possible to facilitate the indication portion 1312d to clearly and intuitively indicate whether or not the liquid level of the lubricating oil meets the demand, within the observation range of the observation mechanism 1311.

As shown in fig. 8, as one implementation, the viewing mechanism 1311 includes a viewing member 1311a, a support member 1311b, and a fixing member 1311c. Specifically, the support 1311b is disposed around the viewer 1311a so that the support 1311b can protect the viewer 1311a and be fixed to the viewer 1311 a. The support 1311b is at least partially disposed between the viewing member 1311a and the fixing member 1311c for connecting the viewing member 1311a and the fixing member 1311c. The fixing piece 1311c and the boss 1312 are connected so that the observation mechanism 1311 can connect the fixing piece 1311c to the reduction gearbox 131. Wherein, the supporting piece 1311b may be made of metal, so as to be beneficial to improving the structural strength of the observation mechanism 1311; the fixing piece 1311c may be made of rubber, so that the fixing piece 1311c can be in interference fit with the boss 1312, thereby improving the connection stability of the observation mechanism 1311 and the boss 1312; the observation piece 1311a may be provided as a transparent material, so that the observation mechanism 1311 is facilitated to observe the level of the lubricating oil in the reduction gearbox 131.

In the present embodiment, the support 1311b extends at least partially into the reduction gearbox 131, a support portion 1311d surrounding the observation piece 1311a is formed, and a hollow portion 1311e through which lubricating oil can pass is provided in the support portion 1311 d. With the above arrangement, the lubricant in the hollowed-out portion 1311e can be made to flow to the observation piece 1311a through the supporting portion 1311d, so that the liquid level of the lubricant in the reduction gearbox 131 can be visually observed through the observation piece 1311 a.

As one implementation, the viewing mechanism 1311 is provided at the rear of the reduction gearbox 131. Wherein, the rear part of the reduction gearbox 131 is basically free from shielding of all-terrain vehicle 100 parts, so that the observation of the lubricating oil level through the observation mechanism 1311 is facilitated, and the convenience and intuitiveness of the observation mechanism 1311 in observing the lubricating oil level of the reduction gearbox 131 are improved.

As shown in fig. 2, 11 and 12, as one implementation, the all-terrain vehicle 100 further includes an air filter 16, the air filter 16 being disposed on the engine 121 and in communication with an intake passage of the engine 121 to deliver ambient air into the engine 121. Specifically, the air filter 16 includes an air filter housing 161 and a filter cartridge 162, and the filter cartridge 162 is disposed in the air filter housing 161. The filter element 162 is used for filtering impurities in the external air, so as to prevent impurities such as silt in the air from entering the interior of the engine 121 to disable the engine 121.

More specifically, the air filter housing 161 is provided with an air outlet 1611, the air outlet 1611 communicates with the engine 121, and further, the air outlet 1611 communicates with an air intake passage of the engine 121, so that filtered air can be delivered into the air intake passage of the engine 121. The air filter housing 161 extends inward and is formed with a limiting portion 1612, one end of the filter element 162 is connected with the air outlet 1611, and the other end of the filter element 162 is clamped with the limiting portion 1612. Through the arrangement, the filter element 162 can be fixed through the cooperation between the air outlet 1611 and the air filter shell 161, so that the fixing structure of the additional filter element 162 is reduced, the fixing structure of the filter element 162 can be simplified, and the structural compactness and the space utilization rate of the air filter 16 are improved; and at the same time, the stability of the filter element 162 can be improved, thereby preventing the filter element 162 from falling off. Specifically, the filter element 162 is sleeved on the air outlet 1611, so that the tightness of the filter element 162 and the air outlet 1611 is improved.

As one implementation, air filter housing 161 includes a first housing 1613 and a second housing 1614. The limit portion 1612 includes a first limit portion 1612a and a second limit portion 1612b. The first limiting portion 1612a is disposed on the first housing 1613, and the second limiting portion 1612b is disposed on the second housing 1614. The first limit portion 1612a and the second limit portion 1612b cooperate to fix an end of the filter element 162 away from the air outlet 1611. Through the arrangement, the filter element 162 can be fixed through the cooperation among the air outlet 1611, the first shell 1613 and the second shell 1614, so that the fixing structure of the additional filter element 162 is reduced, the fixing structure of the filter element 162 can be simplified, and the structural compactness and the space utilization rate of the air filter 16 are improved; and at the same time, the stability of the filter element 162 can be improved, thereby preventing the filter element 162 from falling off. Specifically, the upper surface of the second housing 1614 is recessed and the second stopper 1612b is formed, so that the cost of the second housing 1614 can be reduced to improve the resource utilization of the air filter 16; and simultaneously, demolding of second housing 1614 can be facilitated, thereby reducing the difficulty in processing second housing 1614. In this embodiment, the second housing 1614 is at least partially disposed on the upper side of the first housing 1613, and the air outlet 1611 is disposed on the first housing 1613.

As an implementation manner, fixing portions 1621 are disposed at two ends of the filter element 162, the filter element 162 and the air outlet 1611 are sealed through the fixing portions 1621 after being connected, and the filter element 162 and the limiting portions 1612 are in interference fit through the fixing portions 1621. Specifically, the filter element 162 is sleeved on the air outlet 1611 and then sealed by the fixing portion 1621, so that the tightness between the filter element 162 and the air outlet 1611 is improved. Through the above arrangement, the connection stability between the filter element 162 and the stopper 1612 is further improved, and the sealing performance between the filter element 162 and the air outlet 1611 can be improved. Wherein, the fixing portion 1621 may be configured as a rubber member to facilitate sealing between the filter element 162 and the air outlet 1611, and to facilitate an interference fit of the spacing portion 1612 and the filter element 162.

More specifically, the first and second stopper portions 1612a and 1612b are cooperatively formed with a fixing space having a contour substantially identical to an outer contour of the fixing portion 1621. Through the above arrangement, the connection stability of the filter element 162 and the limiting portion 1612 can be improved, so that the filter element 162 is prevented from shaking in the air filter housing 161, abnormal sound of the air filter 16 is prevented, and the working stability of the air filter 16 is improved. In addition, the filter cartridge 162 can be easily assembled and disassembled, thereby improving the assembly efficiency of the filter cartridge 162 and the air filter housing 161.

As one implementation, the air filter housing 161 extends substantially along a predetermined line 1616 and the filter cartridge 162 extends substantially along the predetermined line 1616. An air inlet 1615 for intake air is provided in the air filter housing 161, and the air filter 16 delivers outside air into the air filter housing 161 through the air inlet 1615. The surface defining the air filter housing 161 to be distributed in a direction perpendicular to the preset straight line 1616 is a side surface of the air filter housing 161, and the air inlet 1615 is provided on the side surface of the air filter housing 161. Outside air enters the air filter housing 161 through an air inlet 1615 on the side surface of the air filter housing 161, and the air in the air filter housing 161 is filtered by the filter element 162 and then is conveyed into an air inlet of the engine 121 through an air outlet 1611.

As shown in fig. 11 and 13, as one implementation, the air filter 16 further includes a seal 163, the seal 163 configured to seal the first housing 1613 and the second housing 1614. Wherein the sealing member 163 is disposed between the first and second housings 1613 and 1614, thereby preventing air introduced from the air inlet 1615 from leaking from the air filter housing 161, and also preventing foreign substances such as external silt from affecting the connection stability between the first and second housings 1613 and 1614.

In the present embodiment, the first housing 1613 has a groove 1613a formed along an edge of the first housing 1613, and the seal 163 is at least partially disposed in the groove 1613a and is engaged with the groove 1613 a. Wherein the sealing member 163 may be provided as a sealing strip. With the above arrangement, the seal 163 can be fixed in the groove body 1613a, thereby improving the connection stability of the seal 163 and the first housing 1613.

More specifically, the second housing 1614 has a first clamping groove 1614a and a second clamping groove 1614b formed thereon, and the seal 163 includes at least a first clamping portion 1631 and a second clamping portion 1632. The first clamping portion 1631 is in interference fit with the first clamping groove 1614a, the second clamping portion 1632 is in interference fit with the second clamping groove 1614b, and the extending direction of the first clamping groove 1614a is different from that of the second clamping groove 1614b, so that the tightness between the first shell 1613 and the second shell 1614 is improved. Specifically, the sealing member 163 is disposed in the groove body 1613a, when the second housing 1614 is pressed and assembled, the sealing member 163 is deformed by pressing, the first clamping portion 1631 enters the first clamping groove 1614a and is in interference fit with the first clamping groove 1614a, and the second clamping groove 1614b enters the second clamping groove 1614b and is in interference fit with the second clamping groove 1614b, so that the outside air and the inside air cannot pass through the first clamping portion 1631 and the second clamping portion 1632, and the tightness between the first housing 1613 and the second housing 1614 is improved.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims (10)

1. An all-terrain vehicle comprising:

a frame;

an engine supported by the frame and including an outer housing and a cooling water jacket disposed within the outer housing;

a drive train supported by the frame and drivingly connected to the engine;

the walking assembly is arranged on the lower side of the frame and is connected to the transmission system in a transmission way; it is characterized in that the method comprises the steps of,

the engine is characterized in that an exhaust port which is communicated with the cooling water jacket and the outside is formed in the outer shell, the engine further comprises a fastener which is arranged in the exhaust port and is connected with the exhaust port, an exhaust groove is formed in the fastener, the fastener comprises a sealing state and an exhaust state, when the fastener is in the sealing state, the exhaust port is isolated from the outside through the fastener, and when the fastener is in the exhaust state, the exhaust groove is communicated with the exhaust port and the outside.

2. The all-terrain vehicle of claim 1, wherein the fastener includes a sealed end and a connection end, the vent slot being disposed on the connection end, the connection end and the vent slot both being located in the vent when the fastener is in the sealed state, the sealed end abutting an outer edge of the vent; when the fastener is in the venting state, the connecting end and the venting groove are at least partially located outside the vent, and the sealing end is separated from the outer edge of the vent.

3. The all-terrain vehicle of claim 2, wherein the engine further comprises a seal member that is nested at the connection end, the seal member abutting against the sealing end and an outer edge of the exhaust port, respectively, when the fastener is in the sealed condition.

4. The all-terrain vehicle of claim 2, characterized in that the connection end and the exhaust port are threadably coupled.

5. The all-terrain vehicle of claim 2, characterized in that a length of the vent slot along the direction of extension of the link is substantially identical to a length of the link along the direction of extension of the link.

6. The all-terrain vehicle of claim 2, characterized in that the direction of extension of the exhaust port, the connecting end, and the exhaust slot is substantially uniform.

7. The all-terrain vehicle of claim 1, characterized in that the exhaust port is provided on an upper side of an uppermost end of the cooling water jacket.

8. The all-terrain vehicle of claim 1, characterized in that the engine further comprises an exhaust passage for exhaust when the engine is in an operating state, the exhaust port being provided on and in communication with the exhaust passage.

9. The all-terrain vehicle of claim 8, characterized in that the exhaust port is at least partially disposed on an upper side of the exhaust passage.

10. The all-terrain vehicle of claim 1, characterized in that the outer housing includes a cylinder head, the exhaust port being located on the cylinder head.