Motorcycle air filter

Abstract

The utility model provides a motorcycle air filter, which belongs to the technical field of motorcycles. It solves the problem of how to improve the service life of the filter element while eliminating impurities in the air intake process. The motorcycle air filter includes a shell, the shell has an air intake cavity and an air outlet cavity connected to each other, a filter element is arranged between the air intake cavity and the air outlet cavity in the shell, an air intake channel connected to the air intake cavity and an air outlet pipe connected to the air outlet cavity are arranged on the shell, the air intake port of the air intake channel is arranged downward, the air outlet port of the air intake channel is arranged upwardly inclined, the air intake channel has a filter surface located above the air intake port of the air intake channel and opposite to the air intake port of the air intake channel, the filter surface is arranged close to the air outlet port of the air intake channel, and one end of the filter surface close to the air outlet port of the air intake channel is inclined upward, and the air outlet port of the air intake channel is connected to an air guide pipe extending into the air intake cavity. The motorcycle air filter can improve the service life of the filter element while eliminating impurities in the air intake process.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycles and relates to an air filter for a motorcycle. Background Art

[0002] Motorcycles are a common means of transportation in the prior art, and the engine is an indispensable part of the motorcycle. During the operation of the engine, the air filter plays a vital role. It is mainly used to filter the inhaled air to remove water vapor and dust in the air, and then send the filtered air into the engine to mix with the fuel.

[0003] For example, a motorcycle air filter disclosed in a Chinese patent (authorization announcement number: CN211038866U) includes a shell and a filter element arranged in the shell and dividing the inner cavity of the shell into an air inlet cavity and an air outlet cavity. The shell has an air inlet connected to the air inlet cavity and an air outlet connected to the air outlet cavity. An air outlet pipe is provided in the air outlet cavity. The air outlet has a pipe joint protruding inwardly, and one end of the air outlet pipe is detachably connected to the pipe joint.

[0004] Combined with Figure 1-4 It can be seen that the air filter disclosed in the comparative document draws air into the air inlet chamber 13 in the shell 1 through the air inlet 11, and filters the inhaled air through the filter element 2, so that the filtered air enters the air outlet chamber 14 and then passes into the air outlet pipe 3, and is finally discharged from the air outlet 12.

[0005] During actual use, the air inhaled into the air intake chamber directly acts on the filter element, so that all impurities such as water vapor and dust are adsorbed by the filter element. Over time, the actual service life of the filter element will inevitably be reduced, requiring users to frequently replace or clean the filter element. Summary of the invention

[0006] The utility model aims at solving the above problems in the prior art and proposes a motorcycle air filter. The technical problem to be solved by the utility model is: how to eliminate impurities in the air intake process and at the same time increase the service life of the filter element.

[0007] The objectives of the utility model can be achieved through the following technical solutions: a motorcycle air filter, comprising a shell, the interior of the shell having an air inlet cavity and an air outlet cavity connected to each other, a filter element is provided in the shell between the air inlet cavity and the air outlet cavity, an air inlet channel connected to the air inlet cavity and an air outlet pipe connected to the air outlet cavity are provided on the shell, and the utility model is characterized in that the air inlet port of the air inlet channel is arranged downward, the air outlet port of the air inlet channel is arranged upwardly inclined, the air inlet channel has a filter surface located above the air inlet port of the air inlet channel and opposite to the air inlet port of the air inlet channel, the filter surface is arranged near the air outlet port of the air inlet channel, and one end of the filter surface near the air outlet port of the air inlet channel is inclined upward, and the air outlet port of the air inlet channel is connected to an air guide pipe extending into the air inlet cavity.

[0008] The motorcycle air filter comprises a shell with an air inlet cavity and an air outlet cavity provided therein, and a filter element is installed in the shell to separate the air inlet cavity and the air outlet cavity. When the motorcycle air filter is working, air is sucked in from the outside through an air inlet passage provided therein, and after the air is pressed into the air inlet cavity, the air is filtered through the filter element so that impurities such as water vapor and dust carried in the air are filtered out, the filtered air is passed into the air outlet cavity, and finally passed into the engine through the air outlet pipe to be mixed with the mist fuel. Under the above premise, the advantage of the present application is that the motorcycle air filter sets the air inlet port of the air inlet passage downward and the air inlet port upward, and installs an air guide pipe at the air outlet port of the air inlet passage. When the engine is working and inhaling air inward, air is sucked into the air inlet passage of the air filter from the air inlet passage. In this process, due to the existence of the filter surface, the air is sucked in and impacts the filter surface. At this time, the water vapor contained in the air The water vapor condenses on the inner wall of the air outlet port of the air inlet channel to form water droplets, and at the same time, particulate impurities such as dust in the air are also retained in the water droplets. Under the action of gravity, the water droplets carrying impurities slide along the filter surface and are finally discharged from the air inlet port of the air inlet channel, thereby achieving the effect of preliminary filtration of the air before it passes through the filter element to filter the air, greatly reducing the filtration pressure of the filter element to a great extent, and improving the service life of the filter element while eliminating water vapor and dust in the air intake process. At the same time, after the preliminary filtration, the air can flow along the inner wall of the air outlet port of the air inlet channel and be introduced into the air inlet cavity of the air filter through the air guide pipe, and the air guide pipe is installed at the air outlet port of the air inlet channel and extends into the air inlet cavity. This arrangement can effectively avoid the Venturi effect that may exist at the air outlet port of the air inlet channel at the entrance of the air inlet cavity, thereby preventing the filtered impurities from being sucked into the air inlet cavity due to the existence of negative pressure, thereby ensuring the service life of the filter element.

[0009] In the above-mentioned motorcycle air filter, the inner wall of the air intake passage near the air intake port forms a guide surface inclined from top to bottom toward the rear end of the motorcycle, and the guide surface is connected to the filter surface, and an angle α less than 180 degrees is formed between the guide surface and the filter surface. After the air enters through the air intake port of the air intake passage, the guide surface can play a sufficient guiding role to ensure that the air can impact the filter surface, thereby ensuring the filtering effect of the filter surface on the air, and at the same time, due to the angle α existing at the intersection of the filter surface and the guide surface, it is ensured that when the airflow transitions from the guide surface to the filter surface, the inner wall at the corner can play a certain turbulent role on the airflow, reducing the flow rate of the air in the air intake cavity, thereby ensuring that the air is in contact with the filter surface for a longer time, thereby ensuring a more sufficient initial filtering effect on the air.

[0010] In the above-mentioned motorcycle air filter, the connection between the filter surface and the guide surface has a first buffer portion protruding inwardly, and the end of the filter surface close to the air outlet port of the air inlet channel has a second buffer portion protruding inwardly. The existence of the first buffer portion and the second buffer portion can buffer the air to ensure that the air flows more slowly. Specifically, the first buffer portion is arranged at the connection between the filter surface and the guide surface to ensure the contact time between the air and the guide surface, and the second buffer surface is arranged on the inner wall of the guide surface close to the air outlet port of the air inlet channel to ensure that the air flow rate output by the air inlet cavity is reduced, thereby improving the filtering effect of the filter element on the air.

[0011] In the above-mentioned motorcycle air filter, the outer walls of the first buffer part and the second buffer part are both in an arc shape, so as to ensure that the airflow is buffered and the airflow velocity is reduced, thereby avoiding turbulence of the air in the air intake cavity.

[0012] In the above-mentioned motorcycle air filter, the inner wall of the air intake passage opposite to the filter surface and the guide surface protrudes into the air intake passage to form a guide surface, and the guide surface is in a curved shape. The existence of the guide surface can play a role in guiding the air in cooperation with the guide surface, ensuring that the air can impact the filter surface. At the same time, on the basis of the above, the existence of the guide surface can also make the space in the air intake cavity more tortuous, thereby achieving the purpose of improving the air flow path, ensuring that the air flow rate is reduced, and ensuring the subsequent filter element The filtering effect of the air.

[0013] In the above-mentioned motorcycle air filter, the air duct is detachably connected to the air outlet port of the air inlet passage, the air duct is located on one side of the filter element and is curved in an arc shape, and a plurality of guide plates are provided in the air duct to divide the internal cavity of the air duct along the width direction of the air duct. The curved setting of the air duct can make the internal air supply flow path longer, and at the same time can ensure that the air entering the air inlet cavity can form a spiral vortex in the air inlet cavity under the guidance of the air duct, and through the setting of each guide plate, the airflow is guided, that is, the formed vortex can be ensured to be more stable, so as to avoid the air entering the air duct from hitting the inner wall of the air inlet cavity and causing air turbulence in the air inlet cavity.

[0014] In the above-mentioned motorcycle air filter, the air guide pipe is in the shape of a square tube, one end of the air guide pipe detachably connected to the air outlet port of the air inlet channel is in a flared shape, and the outlet end face of the air guide pipe is inclined toward the filter element, so that the inlet end of the air guide pipe forms a guiding effect, which reduces the collision of air with the port as much as possible and avoids the occurrence of turbulence. At the same time, the outlet end of the air guide pipe can also form a guide to further improve the vortex effect formed.

[0015] In the above-mentioned motorcycle air filter, the outlet end of the air guide pipe is arranged obliquely downward, and the air intake cavity has an air guide surface arranged near the air intake port of the air intake channel and located obliquely below the air guide pipe, and the air guide surface is curved in an arc shape. Through this arrangement, the air filtered and guided by the air intake channel is input into the air intake cavity by the air guide pipe and flows obliquely downward. After impacting the inner wall of the air intake cavity, the air flow can flow along the inner wall of the air intake cavity. Through the further guiding effect of the guide surface, it is ensured that the air can form a stable vortex in the air intake cavity. Combined with the flow mode of the vortex, it is ensured that the flow path of the air is more gentle when passing through the filter element, thereby ensuring that the filter element filters the air for a long time in the process and ensuring that the air entering the outlet cavity is purer.

[0016] In the above-mentioned motorcycle air filter, the shell includes a plate body with an installation opening in the middle, a first shell and a second shell, the filter element is clamped in the installation opening, the first shell is detachably connected to one side of the plate body and encloses the plate body to form the air inlet cavity, and the second shell is detachably connected to the other side of the plate body and encloses the plate body to form the air outlet cavity. Through this arrangement, the air inlet cavity and the air outlet cavity are distributed left and right relative to the shell. During the air supply process, the flowing airflow can also make the remaining part of the water vapor in the air inlet cavity and the air outlet cavity subject to gravity, so as to ensure that the air after preliminary filtration and filtration by the filter element is further settled in the air inlet cavity and the air outlet cavity, and ensure that the remaining water vapor, dust and other impurities can be further precipitated and deposited, so as to ensure the cleanliness of the air entering the engine. In addition, the first shell and the second shell assembled in a detachable manner can ensure that the air filter can be disassembled as a whole, which is convenient for periodic cleaning of the air inlet cavity and the air outlet cavity.

[0017] In the above-mentioned motorcycle air filter, the second shell is provided with a pipe insertion opening, the air outlet pipe is continuously bent, the air outlet pipe is inserted into the pipe insertion opening and the inner end is arranged close to the installation opening. Through this arrangement, the air entering the air outlet cavity can be transported outward along the pipe wall of the air delivery pipe after entering the air outlet pipe. At the same time, since the air outlet pipe is continuously bent, it is ensured that the air can continuously impact the pipe wall of the air outlet pipe during the flow process, thereby achieving the purpose of re-filtering the air, ensuring that impurities such as water vapor and dust in the air can be fully analyzed, and ensuring the cleanliness of the output air.

[0018] Compared with the prior art, this motorcycle air filter has the following advantages:

[0019] 1. After the outside air is sucked into the air inlet channel, it can be buffered and decelerated by the first buffer part, and then the water vapor in the air condenses on the filter surface to form water droplets through the impact effect on the filter surface. At the same time, the solid impurities in the air are adsorbed by the water droplets and discharged through the air outlet port of the air inlet channel under the action of gravity, so as to achieve preliminary filtration of the air before filtering through the filter element. After the filtered air is buffered and decelerated by the second buffer part, it is guided by the air guide pipe into the air inlet cavity and filtered twice by the filter element.

[0020] 2. The setting of the guide surface and the guide surface cooperates with the filter surface to ensure that the flow of air can be effectively guided. At the same time, the buffering effect of the first buffer part and the second buffer part effectively reduces the air flow rate, ensuring the filtering effect of the filter surface and the filter element on the air.

[0021] 3. With the cooperation of the air guide pipe and the air guide surface in the air intake cavity, the airflow can form a stable vortex in the air intake cavity after being input into the air intake cavity, and the air passes through the filter element at a certain inclination angle. Compared with directly passing through the filter element, the longer the air flow path in the filter element, the longer the air stays, thereby ensuring more complete filtration of the air.

[0022] 4. The continuous bending setting of the air outlet pipe can make the air filtered by the filter element impact the inner wall of the air outlet pipe when it is output from the air outlet pipe, thereby filtering the air before output. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the motorcycle air filter.

[0024] Figure 2 It is a cross-sectional view of the air filter of this motorcycle.

[0025] Figure 3 It is a cross-sectional view of the motorcycle air filter from another perspective.

[0026] Figure 4 It is a cross-sectional view of the motorcycle air filter from the third viewing angle.

[0027] Figure 5 It is a cross-sectional view of the motorcycle air filter from the fourth viewing angle.

[0028] Figure 6 This is an exploded view of the motorcycle's air filter.

[0029] Figure 7 This is the structural diagram of the motorcycle air filter after removing the first shell

[0030] Figure 8 It is a schematic diagram of the structure of the board.

[0031] Fig. 9 It is a schematic structural diagram of the first shell.

[0032] Fig.10 It is a schematic diagram of the structure of the second shell.

[0033] Fig.11 It is a schematic diagram of the structure of the installation cover.

[0034] Fig.12 It is a schematic diagram of the structure of the exhaust pipe.

[0035] Fig.13 It is a schematic diagram of the structure of the airway.

[0036] Fig.14 This is a schematic diagram of the structure of the airway from another perspective.

[0037] In the figure, 1, shell; 11, air inlet cavity; 111, air guide surface; 12, air outlet cavity; 13, filter element; 14, air inlet channel; 141, filter surface; 142, guide surface; 143, first buffer part; 144, second buffer part; 145, guide surface; 146, air inlet port; 147, air outlet port; 15, air outlet pipe; 151, positioning groove; 16, plate body; 161, installation port; 17, first shell; 171, groove; 18, second shell; 181, pipe insertion port; 19, installation cover; 2, air guide pipe; 21, guide plate; 22, annular groove. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0039] like Figure 1 As shown, the motorcycle air filter comprises a housing 1, Figure 2-11 The housing 1 specifically includes a plate body 16, a first shell 17, a second shell 18 and a mounting cover 19, wherein a mounting opening 161 is provided in the middle of the plate body 16, the first shell 17 is fixed to one side of the plate body 16 by bolts, and the second shell 18 is fixed to the other side of the plate body 16 by bolts, thereby forming an air inlet cavity 11 located on one side of the plate body 16 and an air outlet cavity 12 located on the other side of the plate body 16 in the housing 1, and a filter element 13 is mounted in the mounting opening 161 of the plate body 16 by a snap-fitting manner. As a further specific solution, the mounting opening 161 1 is integrally formed with a limiting plate with a plurality of air holes on its surface. After the filter element 13 is inserted into the installation opening 161, it abuts against the limiting plate to ensure the installation stability of the filter element 13. A groove 171 is provided on the front end outer wall of the first shell 17, and an air inlet communicated with the groove 171 is provided on the front end outer wall of the first shell 17. The installation cover 19 is screwed and fixed to the front end of the first shell 17 by bolts and covers the groove 171, so that the installation cover 19 and the groove 171 are surrounded to form an air inlet channel 14 communicated with the air inlet cavity 11 through the air inlet.

[0040] Combination Fig.13 and Fig.14The air inlet port 146 of the air inlet channel 14 is arranged downward, and the air outlet port 147 is inclined upward. The air inlet channel 14 has a filter surface 141 arranged near the air inlet port 146 of the air inlet channel 14 and opposite to the air inlet port 146 of the air inlet channel 14. The filter surface 141 is arranged upwardly inclined. The air inlet port 146 of the air inlet channel 14 is inclined from the upper end to the lower end toward the rear end of the motorcycle to form a guide surface 142 connected to the filter surface 141. A guide surface 142 is formed between the guide surface 142 and the filter surface 141. Angle α, 0°<angle α<180°, a strip-shaped air guide tube 2 is provided at the air outlet port 147 of the air inlet channel 14, and the air guide tube 2 extends into the air inlet cavity 11 through the air inlet port, and a first buffer portion 143 protruding inwardly is provided at the connection between the guide surface 142 and the filter surface 141 in the air inlet channel 14, and a second buffer portion 144 protruding inwardly is provided on the inner wall of the filter surface 141 near the air outlet port 147 of the air inlet channel 14, and the first buffer portion 141 and the second buffer portion 144 are provided. The outer wall of the punching portion 142 is arc-shaped, and the inner wall of the air inlet channel 14 opposite to the filter surface 141 and the guide surface 142 is inwardly recessed to form a curved guide surface 145. The air inlet cavity 11 has an air guide surface 111 arranged near the air inlet channel 14 and located obliquely below the air guide pipe 2, and the air guide surface 111 is specifically in the shape of an arc surface. An annular groove 22 is opened on the outer wall of the inlet end of the air guide pipe 2 along the circumferential direction, and the air guide pipe 2 is clamped with the air outlet port 147 of the air inlet channel 14 through the annular groove 22. The air duct 2 is connected (it can also be seen as the air duct 2 being connected to the inner edge of the air inlet through the annular groove 22), the air duct 2 is bent along the length direction and is located on one side of the filter element 13, the air duct 2 is in the shape of a square tube, and a plurality of guide plates 21 are arranged at intervals along the width direction inside the air duct 2, so as to divide the cavity inside the air duct 2 into a plurality of channels. In addition, the inlet end of the air duct 2 is in a flared shape and has an arc transition along the circumferential direction, and the end of the air duct 2 extending into the air inlet cavity 11 is inclined toward the filter element 13.

[0041] In addition, if Fig. 9 and Fig.11 As shown, the upper edge of the groove 171 is integrally formed with a long strip-shaped retaining edge, the outer wall edge of the first shell 17 adjacent to the groove 171 has a convex strip, and a limiting groove is provided on the inner wall of the mounting cover 19 corresponding to the convex strip. When the mounting cover 19 covers the groove 171, the convex strip is embedded in the limiting groove, and at the same time, the retaining edge limits the outer wall of the mounting cover 19, thereby ensuring that the mounting cover 19 is quickly docked into place during installation.

[0042] Combination Fig.12The air outlet pipe 15 is in the shape of a long strip and is continuously bent. A pipe through-hole 181 is provided on the front outer wall of the second shell 18. The inner end of the air outlet pipe 15 extends into the air inlet cavity 11 through the pipe through-hole 181 and is adjacent to the installation hole 161. The diameter of the air outlet pipe 15 gradually decreases from the inner end to the outer end, and the length of the air outlet pipe 15 extending into the air outlet cavity 12 is greater than half of the overall length. Two positioning plates are integrally formed along the circumferential direction on the outer side wall near the middle of the air outlet pipe 15, and an annular positioning groove 151 is formed between the two positioning plates. The air outlet pipe 15 is clamped with the inner edge of the pipe through-hole 181 through the positioning groove 151, so as to ensure the stable installation of the air outlet pipe 15.

[0043] Working principle: When the engine is working, air is sucked inward through the air filter. At this time, the air is sucked inward into the intake channel 14 through the intake port 146 of the intake channel 14. In this process, the air flows from bottom to top through the buffering and deceleration of the first buffer part 141 and then impacts the filter surface 141 through the guidance of the guide surface 142 and the guide surface 145. At this time, the water vapor, dust and other impurities contained in the air can be attached to the filter surface 141 in the form of water droplets due to the impact. Due to the effect of gravity, the water droplets with impurities fall back and are discharged through the intake port 146 of the intake channel 14. At this time, the preliminary filtration of the air is completed, and then the air that has been initially filtered passes through the second buffering and deceleration of the second buffer part 142 and the guidance of the guide surface 145. Finally, it enters the air inlet cavity through the air guide pipe 2. Under the guidance of the air guide pipe 2, the inner wall of the air inlet cavity 11 and the air guide surface 111, the air entering the air inlet cavity 11 flows stably in the air inlet cavity in the form of a spiral vortex, passes through the filter element 13 at a certain inclination angle relative to the filter element 13, and the filter element 13 performs secondary filtration on impurities such as water vapor and dust in the air, so that the air enters the air outlet cavity 12. At this time, the air is pressed into the air outlet pipe 15 by the subsequent air pressure. The air can flow along the curved wall of the air outlet pipe 15 and continuously impact the wall of the air outlet pipe 15, so as to get rid of the remaining small amount of water vapor and dust in the air. Finally, the filtered air is discharged through the air outlet pipe 15 and passed into the engine to mix with the mist fuel.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0045] Although this article uses more terms such as housing 1, air inlet cavity 11, air guide surface 111, air outlet cavity 12, filter element 13, air inlet channel 14, filter surface 141, guide surface 142, first buffer portion 143, second buffer portion 144, guide surface 145, air inlet port 146, air outlet port 147, air outlet pipe 15, positioning groove 151, plate body 16, installation port 161, first shell 17, groove 171, second shell 18, pipe insertion port 181, installation cover 19, air guide pipe 2, guide plate 21, annular groove 22, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A motorcycle air filter, comprising a housing (1), wherein the housing (1) has an air inlet cavity (11) and an air outlet cavity (12) connected to each other, wherein a filter element (13) is arranged between the air inlet cavity (11) and the air outlet cavity (12) in the housing (1), and wherein the housing (1) is provided with an air inlet passage (14) connected to the air inlet cavity (11) and an air outlet pipe (15) connected to the air outlet cavity (12), wherein: The air inlet port (146) of the air inlet channel (14) is arranged downward, and the air outlet port (147) of the air inlet channel (14) is arranged upwardly inclined. The air inlet channel (14) has a filter surface (141) located above the air inlet port (146) of the air inlet channel (14) and opposite to the air inlet port (146) of the air inlet channel (14). The filter surface (141) is arranged close to the air outlet port (147) of the air inlet channel (14), and one end of the filter surface (141) close to the air outlet port (147) of the air inlet channel (14) is inclined upward. The air outlet port (147) of the air inlet channel (14) is connected to an air guide pipe (2) extending into the air inlet cavity (11).

2. The motorcycle air filter according to claim 1, characterized in that: The inner wall of the air intake passage (14) close to the air intake port (146) forms a guide surface (142) which is inclined from top to bottom toward the rear end of the motorcycle, and the guide surface (142) is connected to the filter surface (141), and an angle α of less than 180 degrees is formed between the guide surface (142) and the filter surface (141).

3. The motorcycle air filter according to claim 2, characterized in that: The connection between the filtering surface (141) and the guide surface (142) has a first buffer portion (143) protruding inwardly, and one end of the filtering surface (141) close to the air outlet port (147) of the air inlet channel (14) has a second buffer portion (144) protruding inwardly.

4. The motorcycle air filter according to claim 3, characterized in that: The outer walls of the first buffer portion (143) and the second buffer portion (144) are both in the shape of arc surfaces.

5. The motorcycle air filter according to any one of claims 2 to 4, characterized in that: An inner wall of the air intake channel (14) opposite to the filter surface (141) and the flow guide surface (142) protrudes into the air intake channel (14) to form a guide surface (145), and the guide surface (145) is in the shape of a curved surface.

6. The motorcycle air filter according to claim 5, characterized in that: The air guide pipe (2) is detachably connected to the air outlet port (147) of the air inlet channel (14); the air guide pipe (2) is located on one side of the filter element (13) and is curved in an arc shape; and a plurality of guide plates (21) are provided in the air guide pipe (2) for dividing the internal cavity of the air guide pipe (2) along the width direction of the air guide pipe (2).

7. The motorcycle air filter according to claim 6, characterized in that: The air guide tube (2) is in the shape of a square tube, one end of the air guide tube (2) detachably connected to the air outlet port (147) of the air inlet channel (14) is in a flared shape, and the outlet end face of the air guide tube (2) is arranged to be inclined toward the filter element (13).

8. The motorcycle air filter according to claim 7, characterized in that: The outlet end of the air guide pipe (2) is arranged obliquely downward, and the air intake cavity (11) has an air guide surface (111) arranged close to the air intake port (146) of the air intake channel (14) and located obliquely below the air guide pipe (2), and the air guide surface (111) is curved in an arc shape.

9. The motorcycle air filter according to claim 3, characterized in that: The housing (1) comprises a plate body (16) with a mounting opening (161) in the middle, a first outer shell (17) and a second outer shell (18); the filter element (13) is snap-fitted into the mounting opening (161); the first outer shell (17) is detachably connected to one side of the plate body (16) and is enclosed with the plate body (16) to form the air inlet cavity (11); the second outer shell (18) is detachably connected to the other side of the plate body (16) and is enclosed with the plate body (16) to form the air outlet cavity (12).

10. The motorcycle air filter according to claim 9, characterized in that: The second shell (18) is provided with a pipe insertion opening (181), the air outlet pipe (15) is arranged in a continuous bend, and the air outlet pipe (15) is inserted into the pipe insertion opening (181) and the inner end is arranged close to the installation opening (161).

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