Air filter and vehicle

Abstract

The utility model provides an air filter and a vehicle, and belongs to the technical field of vehicle air inlet systems, the air filter comprises an upper shell, a lower shell, a main filter element and a safety filter element; air entering the lower shell from the air inlet enters the filter protection cavity after being filtered by the main filter element and then flows to the engine through the air outlet after being filtered by the safety filter element, and when the main filter element loses efficacy, the safety filter element can be used for filtering inlet air of the engine, so that the safety filter element forms air inlet safety protection on the engine; the condition of complete failure of the filtering function of the air filter is avoided, so that clean and safe intake air of an engine is guaranteed; besides, the safety filter element is detachably connected to the upper shell, so that the relative independence of the safety filter element, the lower shell and the main filter element can be ensured, the main filter element and the safety filter element can be independently replaced without influencing each other, and the replacement convenience of the main filter element and the safety filter element can be ensured; and the adaptability of the vehicle to an extremely severe vehicle use environment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle air intake systems, and in particular relates to an air filter and a vehicle. Background Art

[0002] The air filter ensures the cleanliness of the vehicle engine's intake air. The common structure of air filters equipped in family cars is that the lower shell is fixed to the car body, and the accordion-style air filter element is embedded in the mouth of the lower shell. After the upper shell and the lower shell are connected, the edge frame of the air filter element is pressed and fixed. The upper shell is connected to the engine intake. When the engine is running, differential suction is generated, causing outside air to enter the lower shell. After being filtered by the air filter element, the clean air enters the engine from the upper shell.

[0003] Under normal circumstances, the cleanliness of the engine air intake can be ensured by regularly replacing the air filter. However, in harsh driving environments with a lot of dust and sand, the air filter can easily break and fail in a short period of time. If the air filter is not discovered and replaced in time, a large amount of sand and dust will enter the engine, causing engine wear, failure or even scrapping, resulting in high maintenance costs. Utility Model Content

[0004] The embodiment of the present utility model provides an air filter, which aims to avoid the risk of functional failure of the air filter and ensure the cleanliness and safety of the engine intake air.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: in the first aspect, an air filter is provided, comprising an upper shell, a lower shell, a main filter element and a safety filter element; the upper shell and the lower shell are fastened together and fixed, the upper shell is provided with an air outlet, and the lower shell is provided with an air inlet; the main filter element is embedded in the lower shell and fixed by the pressure of the upper shell, and a filter protection cavity suitable for accommodating the safety filter element is formed between the main filter element and the upper shell; wherein the peripheral wall of the safety filter element forms a filter surface, one end of the safety filter element is open and sealedly connected to the air outlet, and the other end is closed and detachably connected to the upper shell.

[0006] In combination with the first aspect, in a possible implementation, a holder is provided on the inner top wall of the upper shell, a filter element fixing plate is mounted on the holder, and the filter element fixing plate is connected to the closed end of the safety filter element to fix the safety filter element.

[0007] In some embodiments, a support plate is provided at the inner top of the upper shell, and the support plate is located on the side of the filter element fixing plate close to the air outlet; the filter element fixing plate includes a first limiting portion and a second limiting portion, the first limiting portion abuts against the closed end wall of the safety filter element, and the second limiting portion cooperates with the support plate to clamp the closed end peripheral wall of the safety filter element.

[0008] Exemplarily, both sides of the filter element fixing plate have sliding grooves extending up and down; the holder includes two sliding rails, which are respectively inserted into the sliding grooves on both sides of the filter element fixing plate, and the sliding rails are engaged with the sliding grooves up and down.

[0009] For example, the lower end of the slide groove is provided with a downward extending card plate, and the card plate is provided with a clamping rib; the lower end of the slide rail extends out of the slide groove and is provided with a clamping hole; wherein, the card plate is in contact with the slide rail, and the clamping rib is embedded in the clamping hole to form a clamping fit.

[0010] In combination with the first aspect, in a possible implementation, the safety filter element includes a filter cartridge, and a closed end cover and an annular end cover respectively connected to the two ends of the filter cartridge; wherein, the closed end cover is detachably connected to the upper shell body, and the annular end cover is sealed and plugged into the air outlet, and the filter cartridge includes a filter material layer and a support net respectively arranged on the surfaces of both sides of the filter material layer.

[0011] In some embodiments, a limit platform is provided on the outer ring surface of the annular end cover, and the limit platform abuts against a portion of the upper shell located around the air outlet. Both ends of the inner ring surface of the annular end cover are provided with rounded corners.

[0012] Exemplarily, a dust holding layer is provided on the side of the main filter element facing away from the filter protection cavity.

[0013] For example, an air intake cavity is formed between the main filter element and the lower shell, and a one-way drain valve is provided at the bottom of the air intake cavity; the bottom wall and side walls of the lower shell are both provided with flexible connection points for connecting to the vehicle body.

[0014] The beneficial effect of the air filter provided by the utility model is that compared with the prior art, the air filter of the utility model, the air entering the lower shell from the air inlet is filtered by the main filter element and then enters the filter protection cavity, and then enters the interior of the safety filter element through the peripheral wall filtering surface of the safety filter element, and then flows to the engine through the open end of the safety filter element through the air outlet. Based on the above-mentioned air intake process, when the main filter element fails, the safety filter element can be used to filter the engine's intake air, so that the safety filter element forms intake safety protection for the engine, avoiding the situation where the filtering function of the air filter completely fails, thereby ensuring the cleanliness and safety of the engine's intake air, and being able to improve the vehicle's adaptability to extremely harsh vehicle use environments.

[0015] The open end of the safety filter element is sealed and connected to the air outlet, while its closed end is detachably connected to the upper shell, thereby ensuring the relative independence of the safety filter element, the lower shell and the main filter element, so that the main filter element and the safety filter element can be replaced separately without affecting each other, thereby ensuring the convenience of replacing the main filter element and the safety filter element.

[0016] When the safety filter element needs to be replaced, after removing the upper shell, you only need to release the clamping relationship between the filter element fixing plate and the clamping seat, then remove the filter element fixing plate, and then pull the safety filter element from the air outlet. When installing, insert the open end of the safety filter element into the air outlet and then clamp the filter element fixing plate to the clamping seat. The operation is convenient and labor-saving.

[0017] The first stopper abuts the fixed end wall of the safety filter element, thereby limiting the safety filter element in the axial direction and preventing axial movement. The second stopper and the support plate cooperate with the closed end wall of the safety filter element to prevent radial swaying of the safety filter element. This not only facilitates disassembly and assembly but also improves the installation stability of the safety filter element.

[0018] The plug-in cooperation between the slide rail and the slide groove can form a constraint on the filter element fixing plate along the axial direction of the safety filter element, so that the axial limitation of the filter element fixing plate on the safety filter element is more reliable. The upper and lower clamping connections between the slide rail and the slide groove can prevent the filter element fixing plate from falling off, while ensuring the reliability of the upper and lower swing constraints of the filter element fixing plate on the safety filter element. At the same time, it is also convenient to disassemble and assemble the filter element fixing plate when replacing the safety filter element.

[0019] The clamping rib is embedded in the clamping hole to form a snap fit to prevent the slide rail and the slide groove from sliding relative to each other. When disassembling, you only need to press the clamping plate to make the clamping rib disengage from the clamping hole to release the lock, so that the filter element fixing plate can be removed, which is convenient and labor-saving.

[0020] The safety filter element uses the closed end caps and annular end caps at both ends to support and constrain the filter element barrel, thereby improving the structural strength. On this basis, the filter element barrel uses two layers of inner and outer support nets to support the filter material layer, thereby preventing the filter material layer from deformation and failure under the action of air pressure, ensuring the safety and cleanliness of the engine intake.

[0021] By setting a limit platform to abut against the inner wall of the upper shell, the filter element fixing plate can be used to form an axial clamping constraint on the safety filter element, thereby improving the installation stability of the safety filter element. The rounded corners at both ends of the inner ring surface can ensure smooth air circulation and reduce the engine intake resistance.

[0022] The dust holding layer is set on the air inlet side of the main filter element to perform preliminary filtration of the air, thereby improving the filtering effect of the main filter element. At the same time, the dust holding capacity of the main filter element can be increased by setting the dust holding layer.

[0023] By setting a one-way drain valve, the air intake chamber can be drained outward, thereby avoiding water accumulation in the air intake chamber. At the same time, it can also prevent water from entering the air intake chamber when the vehicle's wading depth is higher than the lower shell. The lower shell is connected to the vehicle body through a flexible connection point, which can buffer the vibration transmission from the engine to the lower shell, which not only improves the connection reliability, but also helps to reduce the risk of air filter failure.

[0024] In a second aspect, an embodiment of the present invention further provides a vehicle comprising the above-mentioned air filter.

[0025] The beneficial effect of the vehicle provided by the utility model is that: compared with the existing technology, the vehicle of the utility model adopts the above-mentioned air filter. When the main filter element fails, the safety filter element can be used to filter the engine's intake air, so that the safety filter element can form intake safety protection for the engine, avoiding the situation where the filtering function of the air filter completely fails, thereby ensuring the cleanliness and safety of the engine's intake air, and improving the vehicle's adaptability to extremely harsh vehicle use environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the explosion structure of the air filter provided in an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of the air filter (the upper shell and the lower shell are cut away) provided in an embodiment of the present utility model;

[0028] Figure 3 A schematic diagram of the structure of the safety filter element used in the embodiment of the present utility model installed in the upper housing;

[0029] Figure 4 A perspective view of the interior of the upper housing used in the embodiment of the present utility model;

[0030] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at A in the middle;

[0031] Figure 6 A schematic diagram of the three-dimensional structure of the filter element fixing plate used in the embodiment of the present utility model;

[0032] Figure 7 This is a schematic cross-sectional view of the safety filter element used in the embodiment of the present utility model;

[0033] Figure 8 This is a schematic diagram of the top structure of the lower shell used in the embodiment of the utility model.

[0034] In the figure: 10, upper shell; 100, filter protection chamber; 11, air outlet; 12, base; 121, slide rail; 1211, clamping hole; 122, support rib; 13, filter element fixing plate; 131, first limit part; 132, second limit part; 133, slide groove; 134, clamping plate; 1341, clamping rib; 135, connecting part; 136, triangular support part; 137, weight reduction hole; 14, support Support plate; 20, lower shell; 200, air inlet cavity; 21, air inlet; 22, one-way drain valve; 23, flexible connection point; 231, connecting ear plate; 232, pin column; 30, main filter element; 31, dust holding layer; 40, safety filter element; 41, filter cartridge; 411, filter material layer; 412, support net; 42, closed end cover; 43, annular end cover; 431, limit platform; 432, rounded corner. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] It should be noted that when an element is referred to as being "disposed on" or "connected to" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0037] Please also refer to Figures 1 to 8The air filter provided by the present invention will now be described. The air filter comprises an upper housing 10, a lower housing 20, a main filter element 30, and a safety filter element 40. The upper housing 10 and the lower housing 20 are fastened together, the upper housing 10 is provided with an air outlet 11, and the lower housing 20 is provided with an air inlet 21. The main filter element 30 is embedded in the lower housing 20 and is pressed and fixed by the upper housing 10. A filter protection cavity 100 suitable for accommodating the safety filter element 40 is formed between the main filter element 30 and the upper housing 10. The peripheral wall of the safety filter element 40 forms a filtering surface. One end of the safety filter element 40 is open and sealedly connected to the air outlet 11, while the other end is closed and detachably connected to the upper housing 10.

[0038] It should be noted that the air filter provided in this embodiment can be square, rectangular or round. Considering space saving, a square or rectangular structure is preferably adopted; the upper shell 10 is buckled on the lower shell 20 and fixed by a number of fasteners arranged circumferentially. The top opening of the lower shell 20 is set as a stepped opening suitable for embedding the edge frame of the main filter element 30. The bottom opening of the upper shell 10 and the top opening of the lower shell 20 match each other. At the same time, the upper shell 10 has a pressure rib that presses on the frame of the main filter element 30, thereby making the upper shell 10 and the lower shell 20 cooperate to clamp the main filter element 30. When replacing the main filter element 30, you only need to remove the upper shell 10 to directly take out the main filter element 30, which is convenient and labor-saving.

[0039] Based on the above, the air intake path of the engine is that the outside air enters the lower shell 20 through the air inlet 21, then passes through the main filter element 30 and enters the filter protection cavity 100, and in the filter protection cavity 100, passes through the peripheral wall filter surface of the safety filter element 40 to enter the interior of the safety filter element 40, and then enters the air outlet 11 from the open end of the safety filter element 40, and finally enters the interior of the engine from the air outlet 11. The entire air intake process is based on the engine's suction as the airflow power.

[0040] It should be understood that under normal circumstances, air filtered through the main filter element 30 meets the engine's intake cleanliness requirements. Therefore, the safety filter element 40 only serves as a passage for clean air. When the main filter element 30 breaks and fails, the air entering the safety filter chamber is not filtered by the main filter element 30 and is therefore mixed with a large amount of sand and dust. In this case, the air is filtered during the safety filter element 40 and becomes clean air, thus preventing unfiltered air from directly entering the engine. Based on the above air filtration method, the main filter element 30 must be replaced more frequently than the safety filter element 40. Therefore, it is necessary to meet the requirements for separate replacement of the main filter element 30 and the safety filter element 40.

[0041] In this embodiment, the open end of the safety filter element 40 is sealed and plugged into the air outlet 11, and then the closed end of the safety filter element 40 is detachably connected to the upper shell 10. The detachable connection method can be a screw connection using a hoop and a fastener, or a clamping structure for the closed end, which is not limited here. Based on the above connection method, the safety filter element 40 can be completely separated from the lower shell 20 and the main filter element 30, so that when replacing the main filter element 30, the upper shell 10 can be directly removed (keeping the safety filter element 40 installed on the upper shell 10), and the main filter element 30 can be removed from the embedded opening of the lower shell 20 for replacement. When the safety filter element 40 needs to be replaced, the upper shell 10 is removed (for ease of operation, the upper shell 10 can be turned over to the position where the mouth faces upward), and then the connection between the closed end of the safety filter element 40 and the upper shell 10 is released. The safety filter element 40 can be pulled out from the air outlet 11 for replacement. It can be seen that the replacement operations of the safety filter element 40 and the main filter element 30 do not affect each other, and both are very convenient to replace.

[0042] In this embodiment, the upper shell 10 and the lower shell 20 can be injection-molded using engineering plastics such as PP-GF30, PA6-GF30, and PP-TD20, and the main filter element 30 can be a paper filter element.

[0043] Compared with the prior art, the air filter provided in this embodiment is as follows: the air entering the lower housing 20 from the air inlet 21 is filtered by the main filter element 30 and then enters the filter protection cavity 100, then enters the interior of the safety filter element 40 through the peripheral filter surface of the safety filter element 40, and then flows to the engine through the open end of the safety filter element 40 through the air outlet 11. Based on the above-mentioned intake process, when the main filter element 30 fails, the safety filter element 40 can be used to filter the intake air of the engine, so that the safety filter element 40 forms an intake safety protection for the engine, avoiding the air filter The situation where the filtering function completely fails occurs, thereby ensuring the cleanliness and safety of the engine's intake air, and being able to improve the vehicle's adaptability to extremely harsh vehicle operating environments; in addition, the open end of the safety filter element 40 is sealed with the air outlet 11, and its closed end is detachably connected to the upper shell 10, thereby ensuring the relative independence of the safety filter element 40 and the lower shell 20 and the main filter element 30, so that the main filter element 30 and the safety filter element 40 can be replaced separately without affecting each other, thereby ensuring the convenience of replacing the main filter element 30 and the safety filter element 40.

[0044] In some embodiments, see Figures 3 to 6 The inner top wall of the upper shell 10 is provided with a card seat 12, and the card seat 12 is carded with a filter element fixing plate 13. The filter element fixing plate 13 is connected to the closed end of the safety filter element 40 to fix the safety filter element 40.

[0045] The holder 12 can be integrally injection molded on the inner top wall of the upper shell 10, and the filter element fixing plate 13 can be an injection molded part or a metal sheet metal part. It is preferred to use an injection molded part and configure a weight-reducing hole 137 to meet the lightweight index; when the safety filter element 40 needs to be replaced, after removing the upper shell 10, it is only necessary to release the clamping relationship between the filter element fixing plate 13 and the holder 12, and then the filter element fixing plate 13 can be removed, and then the safety filter element 40 can be pulled out from the air outlet 11. When installing, insert the open end of the safety filter element 40 into the air outlet 11 and then clamp the filter element fixing plate 13 to the holder 12. The operation is convenient and labor-saving.

[0046] For some possible implementations, see Figure 4 A support plate 14 is provided on the inner top of the upper shell 10, and the support plate 14 is located on the side of the filter element fixing plate 13 close to the air outlet 11; the filter element fixing plate 13 includes a first limiting portion 131 and a second limiting portion 132, the first limiting portion 131 abuts against the closed end wall of the safety filter element 40, and the second limiting portion 132 cooperates with the support plate 14 to clamp the closed end peripheral wall of the safety filter element 40.

[0047] The support plate 14 can specifically be an integral injection molded inner top wall of the upper shell 10, and its lower boundary can be an arc that matches the curved surface of the closed end peripheral wall of the safety filter element 40; the first limiting portion 131 is a planar structure extending from top to bottom to ensure that it is in contact with the end face of the closed end, thereby improving the abutment stability of the first limiting portion 131 and the closed end of the safety filter element 40; the second limiting portion 132 is bent at the lower end of the first limiting portion 131 toward the air outlet 11, and the second limiting portion 132 also adopts an arc structure that matches the curved surface of the closed end peripheral wall, thereby enabling the second limiting portion 132 and the support plate 14 to cooperate to form a circumferential clamping fixation on the closed end of the safety filter element 40.

[0048] Thus, the first limiting portion 131 abuts against the fixed end wall of the safety filter element 40, thereby limiting the safety filter element 40 in the axial direction and preventing the safety filter element 40 from axial movement. The second limiting portion 132 and the support plate 14 cooperate with the retaining rib 1341 on the closed end peripheral wall of the safety filter element 40 to prevent the safety filter element 40 from swaying in the radial direction. This not only facilitates assembly and disassembly but also improves the installation stability of the safety filter element 40.

[0049] Optionally, see Figure 5 and Figure 6 In this embodiment, both sides of the filter element fixing plate 13 have sliding grooves 133 extending up and down; the base 12 includes two sliding rails 121, and the two sliding rails 121 are respectively inserted into the sliding grooves 133 on both sides of the filter element fixing plate 13, and the sliding rails 121 and the sliding grooves 133 are engaged with each other up and down.

[0050] The plug-in cooperation between the slide rail 121 and the slide groove 133 can form an axial constraint on the filter element fixing plate 13 along the safety filter element 40, so that the axial limitation of the filter element fixing plate 13 on the safety filter element 40 is more reliable. The upper and lower clamping connection between the slide rail 121 and the slide groove 133 can prevent the filter element fixing plate 13 from falling off, while ensuring the reliability of the upper and lower swing constraints of the filter element fixing plate 13 on the safety filter element 40. At the same time, it is also convenient to disassemble and assemble the filter element fixing plate 13 when replacing the safety filter element 40.

[0051] In order to improve the connection stability of the filter element fixing plate 13, Figures 3 to 6 It is understood that the inner top wall of the upper shell 10 is provided with a support rib 122 to form a limiting plane, and the filter element fixing plate 13 includes a connecting portion 135 for abutting the support rib 122, and the end of the connecting portion 135 close to the air outlet 11 is bent downward and extended to form a first limiting portion 131, and the lower end of the first limiting portion 131 is bent toward the air outlet 11 to form a second limiting portion 132, thereby making the filter element fixing plate 13 form a Z-shaped structure as a whole. At the same time, in order to improve the structural strength and meet the lightweight index, a triangular support portion 136 is provided between the connecting portion 135 and the first limiting portion 131, and a weight reduction hole 137 is opened on the connecting portion 135 and the first limiting portion 131.

[0052] As an optional clamping structure of the slide rail 121 and the slide groove 133, see Figures 3 to 6 The lower end of the slide groove 133 is provided with a downward extending card plate 134, and the card plate 134 is provided with a card rib 1341; the lower end of the slide rail 121 extends out of the slide groove 133 and is provided with a card hole 1211; wherein, the card plate 134 is in contact with the slide rail 121, and the card rib 1341 is embedded in the card hole 1211 to form a snap fit.

[0053] The clamping rib 1341 is embedded in the clamping hole 1211 to form a clamping fit to prevent the slide rail 121 and the slide groove 133 from sliding relative to each other. When disassembling, you only need to press the clamping plate 134 to make the clamping rib 1341 disengage from the clamping hole 1211 to release the lock, thereby removing the filter element fixing plate 13, which is convenient and labor-saving.

[0054] The two ends of the filter element fixing plate 13 are symmetrically provided with U-shaped sliding grooves 133 extending downward with the triangular support portion 136 as the center. The two sliding grooves 133 can be opposite to each other or opposite to each other; the lower end of the slide rail 121 extends out of the sliding groove 133, and at the same time, after the clamping rib 1341 is embedded in the clamping hole 1211, the lower end of the clamping plate 134 is located below the lower end of the sliding groove 133, that is, the lower end of the clamping plate 134 can be easily pulled to make the clamping rib 1341 disengage from the clamping hole 1211, thereby improving the convenience of disassembly; the inner bottom wall of the upper shell 10 is provided with a support frame corresponding to the position of the connecting portion 135, and the filter element fixing plate 13 is restricted in the freedom of up and down movement by the contact between its connecting portion 135 and the support frame and the clamping cooperation between the clamping rib 1341 and the clamping hole 1211, thereby improving the installation stability of the safety filter element 40.

[0055] As a specific embodiment of the above-mentioned safety filter element 40, please refer to Figure 7 The safety filter element 40 includes a filter cartridge 41, and a closed end cover 42 and an annular end cover 43 respectively connected to the two ends of the filter cartridge 41; wherein, the closed end cover 42 is detachably connected to the upper shell 10, and the annular end cover 43 is sealed and plugged into the air outlet 11, and the filter cartridge 41 includes a filter material layer 411 and a support net 412 respectively arranged on the two side surfaces of the filter material layer 411.

[0056] The safety filter element 40 uses the closed end caps 42 and the annular end caps 43 at both ends to support and constrain the filter element tube, thereby improving the structural strength. On this basis, the filter element tube uses the inner and outer layers of support nets 412 to support the filter material layer 411, thereby preventing the filter material layer 411 from deforming and failing under the action of air pressure, thereby ensuring the safety and cleanliness of the engine intake.

[0057] Specifically, the closed end cap 42 and the annular end cap 43 can be made of PU material, and the annular end cap 43 forms an interference fit with the air outlet 11 to ensure the connection sealing; the support mesh 412 located inside the filter material layer 411 is used to support the filter material layer 411 to prevent the filter material layer 411 from collapsing inward. It can be aluminum, aluminum alloy, iron or other metal mesh plates rolled into a tube and then welded by resistance welding, or it can be made of engineering plastic injection molding, and its mesh can be diamond, square or circular; the support mesh 412 located outside the filter material layer 411 is used to restrain the filter material layer 411 from expanding outward. It can be an engineering plastic mesh plate rolled into a tube and then ultrasonically welded, or it can be a metal mesh; the filter material layer 411 can specifically be a non-woven filter material based on natural fibers such as cotton, linen or synthetic fibers such as polyester and polypropylene.

[0058] It should be noted that if Figure 7As shown, the outer ring surface of the annular end cover 43 is provided with a limit platform 431, which abuts against the portion of the upper shell 10 located around the air outlet 11, and both ends of the inner ring surface of the annular end cover 43 are provided with rounded corners 432.

[0059] By setting a limit platform 431 to abut against the inner wall of the upper shell 10, the filter element fixing plate 13 can cooperate with the safety filter element 40 to form an axial clamping constraint, thereby improving the installation stability of the safety filter element 40. The rounded corners 432 at both ends of the inner ring surface can ensure smooth air circulation and reduce the engine intake resistance.

[0060] In some embodiments, such as Figure 2 As shown, the main filter element 30 is provided with a dust holding layer 31 on the side facing away from the filter protection cavity 100. The dust holding layer 31 provided on the air inlet side of the main filter element 30 can provide preliminary filtration of the air, improving the filtering effect of the main filter element 30. At the same time, the dust holding capacity of the main filter element 30 can be increased by providing the dust holding layer 31.

[0061] For some examples, see Figure 2 and Figure 8 An air intake cavity 200 is formed between the main filter element 30 and the lower shell 20, and a one-way drain valve 22 is provided at the bottom of the air intake cavity 200; the bottom wall and side walls of the lower shell 20 are both provided with flexible connection points 23 for connecting to the vehicle body.

[0062] By setting a one-way drain valve 22, the air intake chamber 200 can be drained outward, thereby avoiding water accumulation in the air intake chamber 200, and at the same time, it can also prevent water from entering the air intake chamber 200 when the vehicle wades deeper than the lower shell 20; the lower shell 20 is connected to the vehicle body through a flexible connection point 23, which can buffer the vibration transmission from the engine to the lower shell 20, which not only improves the connection reliability, but also helps to reduce the risk of air filter failure.

[0063] Specifically, such as Figure 8 As shown, the above-mentioned flexible connection point 23 includes a connecting ear plate 231 arranged on the bottom wall of the lower shell 20, and the connecting ear plate 231 has a hole for embedding a shock-absorbing sleeve for inserting a fastener; the flexible connection point 23 also includes a pin column body 232 arranged on the side wall of the lower shell 20, and the pin column body 232 is provided with a shock-absorbing rubber sleeve that is plugged into the jack on the vehicle body.

[0064] Based on the same inventive concept, combined Figures 1 to 8 It is understood that an embodiment of the present application also provides a vehicle comprising the above-mentioned air filter.

[0065] Compared with the prior art, the vehicle provided by the present invention adopts the above-mentioned air filter. When the main filter element 30 fails, the safety filter element 40 can be used to filter the engine's intake air, so that the safety filter element 40 forms intake safety protection for the engine, avoiding the situation where the filtering function of the air filter completely fails, thereby ensuring the cleanliness and safety of the engine's intake air and improving the vehicle's adaptability to extremely harsh vehicle use environments.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Air filter, characterized in that, The invention comprises an upper shell (10), a lower shell (20), a main filter element (30) and a safety filter element (40); the upper shell (10) and the lower shell (20) are fastened and fixed, the upper shell (10) is provided with an air outlet (11), and the lower shell (20) is provided with an air inlet (21); the main filter element (30) is embedded in the lower shell (20) and is pressed and fixed by the upper shell (10); a filter protection cavity (100) suitable for accommodating the safety filter element (40) is formed between the main filter element (30) and the upper shell (10); The peripheral wall of the safety filter element (40) forms a filtering surface, one end of the safety filter element (40) is open and sealedly connected to the air outlet (11), and the other end is closed and detachably connected to the upper shell (10).

2. The air filter according to claim 1, wherein The inner top wall of the upper shell (10) is provided with a holder (12), a filter element fixing plate (13) is fixed on the holder (12), and the filter element fixing plate (13) is connected to the closed end of the safety filter element (40) to fix the safety filter element (40).

3. The air filter according to claim 2, wherein: A support plate (14) is provided on the inner top of the upper shell (10), and the support plate (14) is located on a side of the filter element fixing plate (13) close to the air outlet (11); the filter element fixing plate (13) includes a first limiting portion (131) and a second limiting portion (132), the first limiting portion (131) abuts against the closed end wall of the safety filter element (40), and the second limiting portion (132) cooperates with the support plate (14) to clamp the closed end peripheral wall of the safety filter element (40).

4. The air filter according to claim 2, wherein: Both sides of the filter element fixing plate (13) are provided with sliding grooves (133) extending upward and downward; the clamping seat (12) includes two sliding rails (121), and the two sliding rails (121) are respectively plugged into the sliding grooves (133) on both sides of the filter element fixing plate (13), and the sliding rails (121) and the sliding grooves (133) are engaged with each other in an upward and downward manner.

5. The air filter according to claim 4, characterized in that The lower end of the slide groove (133) is provided with a downwardly extending card plate (134), and the card plate (134) is provided with a card rib (1341); the lower end of the slide rail (121) extends out of the slide groove (133) and is provided with a card hole (1211); wherein, the card plate (134) is in contact with the slide rail (121), and the card rib (1341) is embedded in the card hole (1211) to form a snap fit.

6. The air filter according to claim 1, wherein: The safety filter element (40) comprises a filter cartridge (41), and a closed end cap (42) and an annular end cap (43) respectively connected to both ends of the filter cartridge (41); wherein the closed end cap (42) is detachably connected to the upper shell (10), and the annular end cap (43) is sealed and plugged into the air outlet (11); the filter cartridge (41) comprises a filter material layer (411) and a support net (412) respectively provided on both side surfaces of the filter material layer (411).

7. The air cleaner according to claim 6, wherein: The outer ring surface of the annular end cover (43) is provided with a limiting platform (431), and the limiting platform (431) abuts against a portion of the upper shell (10) located around the air outlet (11). Both ends of the inner ring surface of the annular end cover (43) are provided with rounded corners (432).

8. The air filter according to claim 1, wherein: A dust holding layer (31) is provided on the side of the main filter element (30) facing away from the filter protection cavity (100).

9. The air filter according to any one of claims 1 to 8, characterized in that: An air intake cavity (200) is formed between the main filter element (30) and the lower shell (20), and a one-way drain valve (22) is provided at the bottom of the air intake cavity (200); and flexible connection points (23) for connecting to a vehicle body are provided on the bottom wall and side walls of the lower shell (20).

10. A vehicle, characterized in that The invention comprises an air filter as described in any one of claims 1 to 9.

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