Cross-country motorcycle with efficient air inlet structure

Abstract

The invention discloses a cross-country motorcycle with an efficient air inlet structure, which is provided with two sets of power sources, meanwhile, a battery is combined with an air inlet system to form a heat dissipation and air inlet linkage structure so as to realize heat dissipation of the battery and control of the air inlet speed and the air inlet temperature of an internal combustion engine, and unified control is carried out according to an energy supply mode, the running speed and the temperature. According to the internal combustion engine, the air inlet box is arranged, the air inlet structure and the battery are arranged on the front side and the rear side in the air inlet box correspondingly, the air inlet structure divides the front side of the air inlet box into the peripheral channel and the middle channel, during air inlet, the air blowing motor drives the rotating cylinder to rotate, and inner fan blades in the rotating cylinder form induced air in the middle channel to supply air to the internal combustion engine; meanwhile, the outer fan blades suck external air into the air inlet box along with the rotating cylinder and dissipate heat of the power supply, and in addition, the outer fan blades can rotate to achieve self-adaptive adjustment when rotating along with the rotating cylinder, so that higher air inlet efficiency is provided; and meanwhile, the air inlet direction is automatically changed, and multi-direction air flow is formed in the air inlet box so as to carry out omnibearing heat dissipation on the battery.

Description

Technical Field

[0001] The invention relates to a new energy motorcycle, in particular to an off-road motorcycle with a high-efficiency air intake structure. Background Art

[0002] Off-road motorcycles, also known as off-road two-wheeled motorcycles, are a type of motorcycle used in closed off-road circuits for motorcycle sports or all-terrain vehicle racing.

[0003] At present, off-road motorcycles on the market generally adopt a lower side air intake design, which not only leads to low air intake efficiency, but also the bottom is close to the ground, which easily leads to the entry of ground mud. This problem will be more serious in mountain off-road. In addition, most of the existing motorcycles use a self-priming air intake system, which inhales air through the negative pressure generated by the movement of the piston, which will seriously affect the air intake efficiency. For this reason, some motorcycles improve the air intake efficiency by installing a turbocharger, but the turbocharger has a turbo hysteresis problem, which will cause the air intake efficiency to still not be improved at idle and low speeds, resulting in insufficient power output. Summary of the invention

[0004] Based on the shortcomings of the prior art such as low air intake efficiency of a self-priming system and turbo hysteresis of a turbocharger, the present invention provides an off-road motorcycle with a high-efficiency air intake structure.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: an off-road motorcycle with a high-efficiency air intake structure comprises a motorcycle body with a hybrid power system, the hybrid power system comprises a new energy internal combustion engine, a generator driven by the new energy internal combustion engine and a drive motor driven by a new energy battery, the generator is electrically connected to the new energy battery, the motorcycle body comprises a frame, the engine is arranged on the frame, an air intake box is also arranged on the frame, an installation space is arranged in the air intake box, an exhaust port is arranged at one end of the air intake box, the exhaust port is connected to the air intake port of the engine through a pipeline, and an air intake structure is arranged in the air intake box;

[0006] The air intake structure includes:

[0007] A plurality of air holes are provided on the side wall of the air inlet box;

[0008] A circular mounting platform, which surrounds the exhaust port on the inner side;

[0009] A rotating cylinder is rotatably arranged on a circular mounting platform, and has an inner gear ring and an outer gear ring. An inner fan blade for generating air suction is arranged on the inner wall of the rotating cylinder, and a plurality of rotating shafts are penetrated through the side wall of the rotating cylinder. The outer end of the rotating shaft is provided with an outer fan blade, and the inner end of the rotating shaft is provided with a bevel gear;

[0010] A blower motor is arranged outside the air inlet box and its output shaft extends into the air inlet box and is connected to a gear, which meshes with the outer gear ring;

[0011] The planetary gear includes a sun gear and a planetary gear. The planetary gear meshes with the inner gear ring and the sun gear at the same time. The sun gear is provided with an axle. The axle is provided with a bevel gear. Each bevel gear meshes with the bevel gear. In this scheme, an air intake box is provided and an air intake structure and a battery are provided on the front and rear sides of the air intake box respectively. The air intake structure divides the front side of the air intake box into an outer channel and an intermediate channel. When air is taken in, the rotating cylinder is driven to rotate by a blower motor. The inner fan blades in the rotating cylinder form suction in the intermediate channel to supply air for the internal combustion engine. At the same time, the outer fan blades follow the rotating cylinder to suck the external air into the air intake box and dissipate the heat of the power supply. In addition, the outer fan blades can rotate by themselves when following the rotation of the rotating cylinder to adaptively adjust to provide higher air intake efficiency. At the same time, the air intake direction is automatically changed to form a multi-directional airflow in the air intake box to dissipate the heat of the battery in all directions.

[0012] Preferably, the air holes include a plurality of front air holes on the periphery of the front side of the air intake box and a plurality of rear air holes arranged on the rear side of the air intake box, and the air intake structure and the new energy battery are arranged in the middle of the air intake box and face each other front and back. In this solution, the front air holes are used for air intake, and the rear air holes are used for air exhaust. Part of the gas inhaled by the front air holes is used to dissipate heat for the battery and then discharged from the rear air holes, and part is inhaled into the internal combustion engine for oxygen supply.

[0013] Preferably, the diameter of the front air intake hole is larger than that of the rear air exhaust hole, and an air filter and a temperature sensor are arranged at the front air intake hole. This solution can better distribute the intake air by distinguishing the diameters of the front and rear air exhaust holes.

[0014] Preferably, a plugging device is detachably provided at the rear exhaust hole. In this solution, the plugging device is provided to plug the rear exhaust hole, so that more gas is blown into the internal combustion engine during medium and high speed driving. At this time, since the power of the internal combustion engine is used for driving the motorcycle, the battery is not charged, and the heat dissipation demand of the battery is relatively small.

[0015] Preferably, the inner wall of the rear part of the air intake box has four arc surfaces, and the junction of the four arc surfaces is smoothly transitioned through the arc surfaces. The new energy battery is suspended relative to the inner wall of the rear part of the air intake box, and the rear exhaust hole is set at the center of the rear part of the air intake box. The blocking device is an opening regulating valve set at the rear exhaust hole for adjusting the size of the air port. In this scheme, the setting of the arc surface can form an air guide surface. After the air intake from the peripheral channel flows backward along the arc-shaped inner wall, it is blown into the internal combustion engine from the middle channel. At the same time, the rear exhaust hole is set in the middle position and an opening regulating valve is set to control the size of its opening. When the battery heats up more, the opening is increased to increase the discharge of air after heat dissipation. When the battery heats up less, the rear exhaust hole is reduced or closed, so that part of the airflow automatically flows from the peripheral channel to the middle channel to utilize the airflow formed by driving. In addition, the intake temperature is detected by a temperature sensor set at the pipeline to control the intake temperature between 10-50 degrees. When the temperature is too high, the intake temperature is controlled between 10-50 degrees. When the temperature is high, the opening of the regulating valve is increased to discharge the high-temperature gas after heat dissipation, and the air intake speed is controlled by the speed of the blower motor. When the temperature is low in winter, the opening of the regulating valve is reduced to blow the heat-dissipated gas into the internal combustion engine. This process is uniformly controlled by the controller of the motorcycle, wherein the opening regulating valve and each sensor are connected to the controller of the motorcycle. The indicators that need to be adjusted include the speed of the blower motor and the opening of the opening regulating valve. The adjustment is based on the intake air temperature, vehicle speed, whether the battery is charged, and the driving energy supply mode. It should be noted that when pure electric energy is supplied, the blower motor does not work, and the heat dissipation of the battery is completed through the airflow generated by driving.

[0016] Preferably, a plurality of rotating shafts are provided and the annular array is evenly distributed on the rotating cylinder, and each outer fan blade has a different angle with the horizontal plane when rotating to the same position. This solution sets the angle of the outer fan blades so that different outer fan blades generate airflows in different directions when rotating to the same position, thereby improving the uniformity of heat dissipation.

[0017] Preferably, a locking structure is also provided in the air inlet box, and the locking structure includes a planetary frame arranged on the planetary gear, a locking cylinder arranged on the planetary frame, a circle of circumferentially arranged locking external teeth arranged on the side wall of the locking cylinder, and a telescopic motor arranged in the air inlet box, and an arc-shaped locking block is provided at the output end of the telescopic motor, and locking teeth are provided on the locking block. When the telescopic motor is extended, the locking teeth mesh with the locking external teeth to lock the planetary frame. The telescopic motor is also connected to the controller, and only when the locking motor locks the planetary frame to a limited position, the outer fan blades will be driven to rotate. This mode is used to generate heat dissipation airflow in various directions of the air inlet box when it is hot in summer, so as to improve the heat dissipation efficiency.

[0018] Preferably, the inner fan blades include a plurality of blades and a collar, the wheel shaft passes through the collar and is rotatably matched with the collar, and a detachable stopper is provided at the end of the wheel shaft. This solution can increase the stability of the planetary structure.

[0019] Preferably, an exhaust passage with a gradually decreasing diameter is provided at the front side of the air intake box, and the exhaust passage is connected to the engine air intake pipe and an air flow sensor is provided at the pipe. In this solution, the air flow sensor is provided to cooperate with the motorcycle gear to adjust the speed of the blower motor and thus control the air intake amount.

[0020] Preferably, the hybrid power system also includes a power shaft, a group of sprockets arranged on the rear wheel and the power shaft, and a chain connecting the sprockets. The output shaft of the drive motor and the power shaft are connected via a clutch. The crankshaft of the engine is connected to the gearbox and then connected to the output shaft and the input shaft of the generator via a clutch.

[0021] Compared with the prior art, the advantages of the present invention are as follows: the present application sets an air intake box and sets an air intake structure and a battery on the front and rear sides of the air intake box respectively, the air intake structure divides the front side of the air intake box into an outer channel and a middle channel, when taking in air, the rotating cylinder is driven to rotate by the blower motor, and the inner fan blades in the rotating cylinder form suction in the middle channel to supply air to the internal combustion engine, while the outer fan blades follow the rotating cylinder to suck external air into the air intake box and dissipate the heat of the power supply, in addition, the outer fan blades can rotate by themselves when following the rotation of the rotating cylinder to adaptively adjust to provide higher air intake efficiency, and automatically change the air intake direction to form multi-directional airflow in the air intake box to dissipate the heat of the battery in all directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Figure 1 A side view of the present application;

[0024] Figure 2 A perspective view of the present application;

[0025] Figure 3 It is a schematic diagram of the local structure of this application;

[0026] Figure 4 This is an exploded view of the air intake structure;

[0027] Figure 5 is a three-dimensional diagram of the air intake structure;

[0028] Figure 6 is a cross-sectional view of the air intake structure;

[0029] Figure 7 and Figure 8 is a three-dimensional diagram of the internal part of the air intake structure;

[0030] Fig. 9 This is an exploded view of the internal part of the air intake structure;

[0031] In the figure: 10, motorcycle body; 101, internal combustion engine; 20, air intake structure; 200, locking structure; 2001, telescopic motor; 2002, locking block; 201, air intake box; 2011, front air intake hole; 2012, exhaust port; 2013, rear exhaust hole; 202, pipeline; 203, blower motor; 2031, gear; 204, rotating cylinder; 2041, inner gear ring; 2042, outer gear ring; 205, inner blade; 2051, collar; 2061, bevel gear; 2062, rotating shaft; 2063, outer blade; 207, bevel gear; 2081, wheel axle; 2082, sun gear; 2083, limit head; 2091, locking cylinder; 2092, locking outer gear; 2093, planet carrier; 2094, planet gear. DETAILED DESCRIPTION

[0032] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0033] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0034] Example

[0035] This embodiment mainly describes the title of an off-road motorcycle with a high-efficiency air intake structure. The technical solution adopted by the present invention to solve the above technical problems is: an off-road motorcycle with a high-efficiency air intake structure, such as Figure 1-9 As shown, it includes a motorcycle body 10 with a hybrid power system, the hybrid power system includes a new energy internal combustion engine 101, a generator driven by the new energy internal combustion engine 101 and a drive motor driven by a new energy battery, the generator is electrically connected to the new energy battery, the motorcycle body 10 includes a frame, the engine is arranged on the frame, an air intake box 201 is also arranged on the frame, an installation space is arranged in the air intake box 201, the new energy battery is arranged in the air intake box 201, an exhaust port 2012 is arranged at one end of the air intake box 201, the exhaust port 2012 is connected to the air intake of the engine through a pipeline 202, and an air intake structure 20 is arranged in the air intake box 201;

[0036] The air intake structure 20 comprises:

[0037] A plurality of air holes are provided on the side wall of the air inlet box 201;

[0038] A circular mounting platform, which surrounds the exhaust port 2012 on the inner side;

[0039] The rotating cylinder 204 is rotatably arranged on a circular mounting platform, and has an inner gear ring 2041 and an outer gear ring 2042. An inner fan blade 205 for generating air suction is arranged on the inner wall thereof, and a plurality of rotating shafts 2081 to 2062 are penetrated through the side wall thereof. An outer fan blade 2063 is arranged at the outer end of the rotating shaft 2081 to 2062, and a bevel gear 2061 is arranged at the inner end of the rotating shaft 2081 to 2062;

[0040] The blower motor 203 is arranged outside the air inlet box 201 and its output shaft extends into the air inlet box 201 and is connected to a gear 2031, which meshes with an outer gear ring 2042;

[0041] The planetary gear 2031 includes a sun gear 2082 and a planetary gear 2094 . The planetary gear 2094 meshes with the inner gear ring 2041 and the sun gear 2082 . The sun gear 2082 is provided with a wheel shaft, and the wheel shaft is provided with a bevel gear 207 . Each bevel gear 2061 meshes with the bevel gear 207 . In this solution, an air intake box 201 is provided and an air intake structure 20 and a battery are provided on the front and rear sides of the air intake box 201 respectively. The air intake structure 20 divides the front side of the air intake box 201 into an outer channel and a middle channel. When air is taken in, the rotating cylinder 204 is driven to rotate by the blower motor 203, and the inner fan blades 205 in the rotating cylinder 204 form suction in the middle channel to supply air to the internal combustion engine 101. At the same time, the outer fan blades 2063 follow the rotating cylinder 204 to suck external air into the air intake box 201 and dissipate heat for the power supply. In addition, the outer fan blades 2063 can rotate by themselves when rotating with the rotating cylinder 204 to adaptively adjust to provide higher air intake efficiency, and automatically change the air intake direction to form multi-directional airflow in the air intake box 201 to dissipate heat for the battery in all directions.

[0042] Preferably, the air holes include a plurality of front air holes 2011 on the periphery of the front side of the air intake box 201 and a plurality of rear air holes 2013 arranged on the rear side of the air intake box 201. The air intake structure 20 and the new energy battery are arranged in the middle of the air intake box 201 and face each other front and back. In this solution, the front air holes 2011 are used for air intake, and the rear air holes 2013 are used for exhaust. Part of the gas sucked in by the front air holes 2011 is used to dissipate heat for the battery and then discharged from the rear air holes 2013, and part is sucked into the internal combustion engine 101 for oxygen supply.

[0043] Preferably, the caliber of the front air intake hole 2011 is larger than that of the rear air exhaust hole 2013, and an air filter and a temperature sensor are provided at the front air intake hole 2011. This solution can better distribute the intake air by distinguishing the calibers of the front and rear air exhaust holes 2013.

[0044] Preferably, a plugging device is detachably provided at the rear exhaust hole 2013. In this solution, the plugging device is provided to plug the rear exhaust hole 2013, so that more gas is blown into the internal combustion engine 101 during medium and high speed driving. At this time, since the power of the internal combustion engine 101 is used for driving the motorcycle, the battery is not charged, and the heat dissipation demand of the battery is relatively small.

[0045] Preferably, the inner wall of the rear part of the air intake box 201 has four arc surfaces, and the junctions of the four arc surfaces are smoothly transitioned through the arc surfaces. The new energy battery is suspended relative to the inner wall of the rear side of the air intake box 201, and the rear exhaust hole 2013 is arranged at the center position of the rear part of the air intake box 201. The sealing device is an opening regulating valve arranged at the rear exhaust hole 2013 for adjusting the size of the air outlet. In this solution, the setting of the arc surface can form a wind guide surface, and the air intake of the peripheral channel flows backward along the arc inner wall and then converges and flows to the middle part, and is blown into the internal combustion engine 101 from the middle channel. At the same time, the rear exhaust hole 2013 is set in the middle position and an opening regulating valve is set to control the size of its opening. When the battery heats up more, the opening is increased to increase the discharge of air after heat dissipation, and when the battery heats up less, the rear exhaust hole 2013 is reduced or closed, so that part of the airflow automatically flows from the peripheral channel to the middle channel to utilize the airflow formed by driving. In addition, the intake air temperature is detected by the temperature sensor set at the pipeline 202, and the intake air temperature is controlled between 10-50 degrees. When the temperature is too high, the opening of the regulating valve is increased to discharge the high-temperature gas after heat dissipation, and the air intake speed is controlled by the rotation speed of the blower motor 203. When the temperature is low in winter, the opening of the regulating valve is reduced to blow the gas after heat dissipation into the internal combustion engine 101. This process is uniformly controlled by the controller of the motorcycle, wherein the opening regulating valve and each sensor are connected to the controller of the motorcycle. The indicators that need to be adjusted include the rotation speed of the blower motor 203 and the opening of the opening regulating valve. The adjustment is based on the intake temperature, vehicle speed, whether the battery is charged, and the driving energy supply mode. It should be noted that when pure electric energy is supplied, the blower motor 203 does not work, and the heat dissipation of the battery is completed by the airflow generated by driving.

[0046] Preferably, a plurality of rotating shafts 20812062 are provided and the annular array is evenly distributed on the rotating cylinder 204, and each outer fan blade 2063 has a different angle with the horizontal plane when rotating to the same position. In this solution, the angles of the outer fan blades 2063 are set so that different outer fan blades 2063 generate airflows in different directions when rotating to the same position, thereby improving the uniformity of heat dissipation.

[0047] Preferably, a locking structure 200 is further provided in the air inlet box 201, and the locking structure 200 includes a planetary frame 2093 provided on the planetary gear 2094, a locking cylinder 2091 provided on the planetary frame 2093, a circle of locking outer teeth 2092 provided on the side wall of the locking cylinder 2091, and a telescopic motor 2001 provided in the air inlet box 201, and an arc-shaped locking block 2002 is provided at the output end of the telescopic motor 2001, and locking teeth are provided on the locking block 2002. When the telescopic motor 2001 is extended, the locking teeth mesh with the locking outer teeth 2092 to lock the planetary frame 2093. The telescopic motor 2001 is also connected to the controller, and only when the locking motor locks the planetary frame 2093 to a limited position, the outer fan blade 2063 will be driven to rotate. This mode is used to generate heat dissipation airflow in various directions of the air inlet box 201 when it is hot in summer, so as to improve the heat dissipation efficiency.

[0048] Preferably, the inner fan blade 205 includes a plurality of blades and a collar 2051, the axle passes through the collar 2051 and is rotatably matched with the collar 2051, and a detachable stopper 2083 is provided at the end of the axle. This solution can increase the stability of the planetary structure.

[0049] Preferably, an exhaust passage with a gradually decreasing diameter is provided at the front side of the air intake box 201, and the exhaust passage is connected to the engine intake pipe 202, and an air flow sensor is provided at the pipe 202. In this solution, the air flow sensor is provided to cooperate with the motorcycle gear to adjust the speed of the blower motor 203 to control the intake volume.

[0050] Preferably, the hybrid power system also includes a power shaft, a group of sprockets arranged on the rear wheel and the power shaft, and a chain connecting the sprockets. The output shaft of the drive motor and the power shaft are connected via a clutch. The crankshaft of the engine is connected to the gearbox and then connected to the output shaft and the input shaft of the generator via a clutch.

[0051] The off-road motorcycle title with a high-efficiency air intake structure provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An off-road motorcycle with a high-efficiency air intake structure, comprising a motorcycle body with a hybrid power system, the hybrid power system comprising a new energy internal combustion engine, a generator driven by the new energy internal combustion engine, and a drive motor driven by a new energy battery, the generator being electrically connected to the new energy battery, characterized in that: The motorcycle body includes a frame, the engine is arranged on the frame, an air intake box is also arranged on the frame, an installation space is arranged in the air intake box, the new energy battery is arranged in the air intake box, an exhaust port is arranged at one end of the air intake box, the exhaust port is connected to the air intake port of the engine through a pipeline, and an air intake structure is arranged in the air intake box; The air intake structure includes: A plurality of air holes are provided on the side wall of the air inlet box; A circular mounting platform, which surrounds the exhaust port on the inner side; A rotating cylinder is rotatably arranged on a circular mounting platform, and has an inner gear ring and an outer gear ring. An inner fan blade for generating air suction is arranged on the inner wall of the rotating cylinder, and a plurality of rotating shafts are penetrated through the side wall of the rotating cylinder. The outer end of the rotating shaft is provided with an outer fan blade, and the inner end of the rotating shaft is provided with a bevel gear; A blower motor is arranged outside the air inlet box and its output shaft extends into the air inlet box and is connected to a gear, which meshes with the outer gear ring; The planetary gear comprises a sun gear and a planetary gear, wherein the planetary gear meshes with the inner gear ring and the sun gear at the same time, the sun gear is provided with a wheel shaft, the wheel shaft is provided with a bevel gear, and each bevel gear meshes with the bevel gear.

2. The off-road motorcycle with a high-efficiency air intake structure according to claim 1, characterized in that: The air holes include a plurality of front air holes on the periphery of the front side of the air intake box and a plurality of rear air holes arranged on the rear side of the air intake box. The air intake structure and the new energy battery are arranged in the middle of the air intake box and are opposite to each other front and back.

3. The off-road motorcycle with a high-efficiency air intake structure according to claim 2, characterized in that: The diameter of the front air intake hole is larger than that of the rear air exhaust hole, and an air filter and a temperature sensor are arranged at the front air intake hole.

4. The off-road motorcycle with a high-efficiency air intake structure according to claim 3, characterized in that: A detachable blocking device is provided at the rear exhaust hole.

5. The off-road motorcycle with a high-efficiency air intake structure according to claim 4, characterized in that: The inner wall of the rear part of the air intake box has four arc surfaces, and the junction of the four arc surfaces is smoothly transitioned through the arc surfaces. The new energy battery is suspended relative to the inner wall of the rear part of the air intake box, and the rear exhaust hole is arranged at the center of the rear part of the air intake box. The sealing device is an opening regulating valve arranged at the rear exhaust hole for adjusting the size of the air outlet.

6. The off-road motorcycle with a high-efficiency air intake structure according to claim 1, characterized in that: A plurality of rotating shafts are arranged in a circular array and are evenly distributed on the rotating cylinder. When the outer fan blades rotate to the same position, the angles between the outer fan blades and the horizontal plane are different.

7. The off-road motorcycle with a high-efficiency air intake structure according to claim 1, characterized in that: A locking structure is also provided in the air intake box, which includes a planetary carrier arranged on the planetary wheel, a locking cylinder arranged on the planetary carrier, a circle of circumferentially arranged locking external teeth arranged on the side wall of the locking cylinder, and a telescopic motor arranged in the air intake box. An arc-shaped locking block is provided at the output end of the telescopic motor, and locking teeth are provided on the locking block. When the telescopic motor is extended, the locking teeth engage with the locking external teeth to lock the planetary carrier.

8. The off-road motorcycle with a high-efficiency air intake structure according to claim 1, characterized in that: The inner fan blades include a plurality of blades and a sleeve ring. The wheel shaft passes through the sleeve ring and is rotatably matched with the sleeve ring. A detachable limiting head is provided at the end of the wheel shaft.

9. The off-road motorcycle with a high-efficiency air intake structure according to claim 1, characterized in that: An exhaust passage with a gradually decreasing diameter is provided on the front side of the air intake box. The exhaust passage is connected to the engine intake pipe and an air flow sensor is provided on the pipe.

10. The off-road motorcycle with a high-efficiency air intake structure according to claim 1, characterized in that: The hybrid power system also includes a power shaft, a set of sprockets arranged on the rear wheel and the power shaft, and a chain that connects the sprockets. The output shaft of the drive motor is connected to the power shaft through a clutch. The crankshaft of the engine is connected to the gearbox and then connected to the output shaft and the input shaft of the generator through a clutch.

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