Buffer connecting assembly and air filter

Abstract

The utility model belongs to the technical field of air filters and assembly thereof, and particularly relates to a buffer connecting assembly and an air filter. The utility model provides a buffering connecting assembly which comprises at least one first connecting buckle set and at least one second connecting buckle set. The first connecting buckle set comprises an insertion rod arranged on an installation object and an elastic sleeve gasket arranged on an installation carrier. The second connecting buckle set comprises an elastic clamping ring arranged on the installation object, a rigid lining contained in the elastic clamping ring and a locking piece arranged in the rigid lining in a penetrating mode. The buffer connecting assembly provided by the utility model can absorb and disperse impact force generated by bumping and vibration, reduce dynamic load directly transmitted to an installation object, and protect the installation object from being damaged. The utility model further provides the air filter on the basis of the buffer connecting assembly, and the air filter has excellent impact resistance and is convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of air filters and their assembly, and in particular relates to a buffer connection component and an air filter. Background Art

[0002] With the rapid development of the automobile industry, automobile engine technology is constantly improving, and the requirements for engine performance and life are increasing. As an indispensable part of the engine system, the quality of the air filter design directly affects the engine's working efficiency, emission performance and overall durability.

[0003] The current research and development of air filters mainly focuses on ensuring and improving filtration efficiency and reducing the attenuation of the internal filter element filtration efficiency, while relatively insufficient attention is paid to how to protect the filter itself and the stability of the internal structure under harsh working conditions, especially in the face of strong vibrations caused by complex road conditions and mechanical fatigue during long-term use. In addition, the installation and removal of existing air filters are relatively cumbersome, and the air filter as an installation object needs to be installed in a small and irregular engine compartment, which causes inconvenience for daily maintenance and replacement.

[0004] Therefore, developing an air filter installation structure that can effectively absorb and disperse the vibration and impact caused by engine operation and road conditions, and ensure easy and quick installation and low maintenance cost, is of great practical value for ensuring the long-term stable operation of the air filter and the engine. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a buffer connection assembly, which is used to conveniently, stably and buffer-mount the installation object on a preset installation carrier. On this basis, the utility model also provides an air filter.

[0006] A first aspect of the utility model provides a buffer connection assembly, which is attached to an installation object and used to fix the installation object on a mounting carrier, and comprises at least one first connection buckle group and at least one second connection buckle group.

[0007] Among them, the first connecting buckle group includes an insertion rod arranged on the installation object and an elastic sleeve pad arranged on the installation carrier; the insertion rod has a rod body and an anti-slip portion located at the end of the rod body; a through hole is formed on the elastic sleeve pad; when the insertion rod and the elastic sleeve pad are assembled, the rod body passes through the hole and is confined in the hole.

[0008] The second connecting buckle group includes an elastic snap ring arranged on the installation object, a rigid bushing accommodated in the elastic snap ring, and a locking piece inserted in the rigid bushing, and the locking piece fixes the rigid bushing on the installation carrier.

[0009] As a further optimization solution, the socket passes through the elastic sleeve from top to bottom, and the top of the socket is in a trumpet shape.

[0010] As a further optimization solution, the elastic sleeve has an annular limiting groove around its periphery for assembling the elastic sleeve on the mounting carrier.

[0011] As a further optimization solution, the insertion rod is arranged vertically and is integrally formed on the support ear, and the support ear is arranged on the installation object.

[0012] As a further optimization solution, an auxiliary block connected to the lug is provided at the root of the shaft, and the auxiliary block, the lug and the shaft are integrally formed and connected together.

[0013] As a further optimization solution, the auxiliary block has a tapered outer contour and a plurality of thickness-reducing grooves are formed on a surface of one side.

[0014] As a further optimization solution, the radial dimension of the shaft is smaller than the radial dimension of the anti-slip portion, and the anti-slip portion occupies a range of 150° to 210° in the circumferential direction.

[0015] As a further optimization solution, the elastic clamping ring is provided with a central accommodating hole which passes through from top to bottom to accommodate the rigid bushing; an annular groove is formed on the circumference of the elastic clamping ring to be engaged in the transverse notch on the installation object.

[0016] As a further optimization solution, a group of pressure-bearing buffer blocks are provided on the upper and lower surfaces of the elastic clamping ring around the central accommodating hole, and the distance between the upper surface and the lower surface of the pressure-bearing buffer block is greater than the height of the rigid bushing.

[0017] The second aspect of the utility model provides an air filter, comprising a shell, on which the above-mentioned buffer connection assembly is arranged.

[0018] As a further optimization solution, two first connection buckle groups and one second connection buckle group are provided on the shell, or three first connection buckle groups and one second connection buckle group are provided on the shell.

[0019] Beneficial Effects

[0020] The buffer connection assembly provided by the utility model can absorb and disperse the impact force generated by bumps and vibrations, reduce the dynamic load directly transmitted to the installation object, and protect the installation object from damage.

[0021] The buffer connection assembly provided by the utility model, wherein the first connection buckle group and the second connection buckle group cooperate with each other, not only ensures that the air filter is firmly fixed on the mounting carrier, but also simplifies the installation and disassembly process, which is beneficial to daily maintenance and quick replacement.

[0022] The utility model provides an air filter based on a buffer connection assembly, whose housing is installed in the engine compartment through a first connection buckle group and a second connection buckle group, which not only ensures the balance of support but also maintains the flexibility of installation. The buffer connection assembly absorbs external vibration and impact, reduces the physical damage to the air filter housing and its internal precision filter element, reduces the interference of external factors on the air supply system, ensures the air flow and quality required by the engine, and prolongs the service life and maintenance cycle of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 , Figure 2 A schematic diagram of the air filter structure.

[0024] Figure 3 Schematic diagram of the explosion inside the air filter housing.

[0025] Figure 4 Schematic diagram of the structure of the filter element.

[0026] Figure 5 It is an exploded schematic diagram of the first butt joint edge and the second butt joint edge.

[0027] Figure 6 It is a schematic diagram of assembling the first butt joint edge and the second butt joint edge.

[0028] Figure 7 It is a schematic diagram of the structure of the buffer connection component on the shell.

[0029] Figure 8 , Fig. 9 and Fig.10 It is a schematic structural diagram of the first connecting buckle group.

[0030] Fig.11 and Fig.12 It is a structural schematic diagram of the second connecting buckle group.

[0031] In the figure: 1, housing; 2, air inlet pipe; 3, exhaust pipe; 4, filter element; 5, first connecting buckle group; 6, second connecting buckle group; 11, first filter housing; 12, second filter housing; 13, fastener; 41, filter element; 42, sealing frame; 43, strengthening network; 51, plug rod; 52, elastic sleeve pad; 53, support ear; 61, elastic snap ring; 62, rigid bushing; 63, locking piece; 111, first docking edge Edge; 121, second docking edge; 421, bearing surface; 422, sealing flange; 511, rod body; 512, anti-slip portion; 513, auxiliary block; 514, thickness reduction groove; 521, plug hole; 522, limit slot; 611, central accommodating hole; 612, annular slot; 613, pressure buffer block; 1111, supporting step; 1112, threaded hole; 1211, sealing groove; 1212, through hole. DETAILED DESCRIPTION

[0032] The air filter is a key component used in automobile engines. Its main function is to filter the air entering the engine and filter out foreign matter such as dust, sand, and water vapor in the air to protect the engine from damage by foreign matter. When the engine is running, a large amount of clean air is required for combustion, but the air often carries various impurities. If these impurities enter the engine, it will cause wear of components such as the cylinder block, piston rings, and crankshaft, seriously affecting the service life and performance of the engine. Therefore, it is necessary to install an air filter on the engine intake line.

[0033] The air filter of the utility model has a structure as follows Figure 1 and Figure 2 As shown, it includes a housing 1, and also includes an air inlet pipe 2 and an air outlet pipe 3 connected to the housing 1. Figure 3 As shown, a filter element 4 is provided in the shell 1 to divide the internal space of the shell 1 into an air inlet chamber and an air exhaust chamber; the air inlet pipe 2 is connected to the air inlet chamber to introduce the air to be filtered into the air inlet chamber; the air exhaust pipe 3 is connected to the air exhaust chamber to discharge the air that enters the air exhaust chamber after being filtered by the filter element 4.

[0034] The above-mentioned air filter is mainly used to supply clean, impurity-free air to the automobile engine, thereby ensuring the efficient and stable operation of the engine and extending its service life. Its working process is as follows:

[0035] Air intake stage: When the engine is running, a large amount of air is required to participate in combustion; the intake pipe 2 is located at the front end of the air filter and inhales air from the external environment. This air may carry various impurities, such as dust, sand, water vapor, etc.

[0036] Filtration stage: The inhaled air then enters the air intake chamber in the housing 1 through the air intake pipe 2, and then passes through the filter element 4; the filter element 4 can effectively intercept and capture tiny particles in the air, allowing clean air to pass through and enter the exhaust chamber.

[0037] Air discharge stage: The air purified by the filter element 4 enters the exhaust chamber. The exhaust pipe 3 is connected to the exhaust chamber to guide the clean air out and transport it to the next component, usually directly into the intake manifold of the engine, or in a turbocharged vehicle, into the turbocharger to increase the pressure before entering the engine.

[0038] like Figure 3 As shown, the housing 1 comprises a first filter housing 11 and a second filter housing 12 which are butt-jointed, and the first filter housing 11 has a first butt joint edge 111 at the opening, and the second filter housing 12 has a second butt joint edge 121 at the opening. Figure 4As shown, it includes a filter element 41 with a certain thickness and a sealing frame 42 arranged along the edge of the filter element 41, and the sealing frame 42 is elastic; when the first filter housing 11 and the second filter housing 12 are in a docking state, the sealing frame 42 is pressed and fixed between the first docking edge 111 and the second docking edge 121.

[0039] The housing 1 is composed of a first filter housing 11 and a second filter housing 12 that are docked, so that the filter can be easily disassembled to replace or clean the filter element 41, thereby improving the convenience of maintenance. The user can regularly check or replace the filter element 41 without damaging the overall structure to ensure that the engine continues to obtain clean air. The first docking edge 111 and the second docking edge 121 are used for the tight connection between the first filter housing 11 and the second filter housing 12. The sealing frame 42 is located at the edge of the filter element 41 and is elastic. When the two filter housings are docked, the sealing frame 42 is squeezed on both sides and adaptively deformed to form a reliable sealing contact interface to prevent unfiltered air from bypassing the filter element 41 and directly entering the engine, thereby ensuring the filtering effect.

[0040] Preferably, the filter element 41 is a paper filter element or a non-woven fabric filter element.

[0041] Preferably, the sealing frame 42 is made of rubber, silicone, polyurethane and other materials, and has good elasticity and weather resistance. The sealing frame 42 can be prefabricated and installed on the edge of the filter element 41 by assembly, pasting and other methods, and is preferably combined with the edge of the filter element 41 by in-situ molding. In-situ molding allows the sealing frame 42 to be formed and fixed directly at the specified position of the filter element 41, which can achieve more precise size control and stronger bonding strength, reduce the possibility of gaps or looseness introduced by the assembly process, and thus improve the manufacturing accuracy and reliability of the entire filter.

[0042] As a further improvement, a reinforcement network 43 is formed on one side of the filter element 41 and in the area surrounded by the sealing frame 42. The reinforcement network 43 is integrally connected to the sealing frame 42 at the edge. Figure 4 The basic hexagonal structural unit shown is composed of a number of hexagonal network units continuously spread on the surface of the filter element 41, and through pores are formed in each network unit. The reinforced network 43 can also be formed by combining basic structural units of other shapes such as rectangles, triangles, and diamonds. The reinforced network 43 improves the mechanical strength and stability of the filter element 41 by forming a reinforcement structure on the surface of one side of the filter element 41. Especially when the filter element 41 is made of a relatively soft material or needs to withstand a higher airflow pressure, the reinforced network 43 can prevent the filter element 41 from being deformed or damaged due to air pressure difference or vibration, prevent the filter element 41 from affecting the sealing due to deformation, and also help to extend the service life of the filter element 41.

[0043] like Figure 5 and Figure 6 As shown, a sunken support step 1111 is formed inside the first docking edge 111 and along the extension direction of the first docking edge 111, and a bearing surface 421 is formed on the periphery of the sealing frame 42, and the bearing surface 421 is adapted to the end surface of the support step 1111. The support step 1111 is located inside the first docking edge 111 and extends along the edge, forming a supporting structure that accurately matches the sealing frame 42. When the two parts of the filter housing are docked and closed, the bearing surface 421 of the sealing frame 42 can be firmly seated on the end surface of the support step 1111, which is convenient for the filter element 4 to be accurately positioned during assembly, and also prevents the filter element 4 from shifting due to vibration during the driving of the vehicle. At the same time, the bearing surface 421 of the sealing frame 42 is in close contact with the end surface of the support step 1111, and also has a certain effect of blocking air from penetrating from the edge.

[0044] An annular sealing groove 1211 is formed on the second butt joint edge 121 and is located on one side facing the first butt joint edge 111. An annular sealing flange 422 is integrally formed on the sealing frame 42 and is located on one side facing the second butt joint edge 121. When the first butt joint edge 111 and the second butt joint edge 121 are butt-jointed and closed, the sealing flange 422 is elastically deformed adaptively under the pressure of the sealing groove 1211 and filled in the sealing groove 1211. The sealing groove 1211 cooperates with the sealing flange 422, and the sealing flange 422 is elastically deformed to be close to the inner wall of the sealing groove 1211, forming a tight sealing interface, effectively preventing unfiltered air from penetrating into the exhaust cavity from the edge gap of the housing 1, and maintaining the effectiveness of air filtration and the safety of engine operation. In addition, the cooperation of the sealing flange 422 and the sealing groove 1211 also increases the stability of the filter element 4 inside the housing 1, and even if vibration or air pressure fluctuation occurs during the driving of the vehicle, the filter element 4 can be effectively prevented from deflecting or loosening.

[0045] A group of threaded holes 1112 are formed on the end surface of the first butt joint edge 111, and a group of through holes 1212 penetrating the sealing groove 1211 are provided on the second butt joint edge 121. A group of fasteners 13, such as screws, are passed through the through holes 1212 and fastened in the threaded holes 1112 to fasten the first butt joint edge 111 and the second butt joint edge 121 together, thereby generating a strong pressing force to prevent the first butt joint edge 111 and the second butt joint edge 121 from loosening and affecting the sealing effect.

[0046] Preferably, the first butt joint edge 111 is located above the second butt joint edge 121, so that the notch of the sealing groove 1211 faces downward to avoid water or dust accumulation in the notch affecting the durability of the sealing frame 42. In addition, the fastener 13 is preferably arranged on the outside of the sealing flange 422 to avoid the fastener 13 causing the sealing of the inner cavity of the housing 1.

[0047] The following describes the connection between the air filter and the engine compartment.

[0048] The housing 1 of the air filter is used as an installation object, and the engine compartment is used as an installation carrier. The housing 1 is installed in the engine compartment through a set of buffer connection components.

[0049] like Figure 7 As shown, the buffer connection assembly is attached to the installation object and is used to fix the installation object on the installation carrier, and includes at least one first connection buckle group 5 and at least one second connection buckle group 6. The first connection buckle group 5 and the second connection buckle group 6 cooperate to achieve buffering and firm connection of the connection part between the air filter and the engine compartment.

[0050] The first connecting buckle group 5 is as follows Figure 8 , Fig. 9 and Fig.10 As shown, the first connecting buckle group 5 includes an insertion rod 51 arranged on the installation object and an elastic sleeve pad 52 arranged on the installation carrier; the insertion rod 51 has a rod body 511 and an anti-slip portion 512 located at the end of the rod body 511; a through-hole 521 is formed on the elastic sleeve pad 52; when the insertion rod 51 and the elastic sleeve pad 52 are assembled, the rod body 511 passes through the socket 521 and is confined in the socket 521. The elastic sleeve pad 52 is elastic and can provide strong friction resistance after the insertion of the insertion rod 51. In combination with the anti-slip portion 512, the insertion rod 51 is not easy to fall off from the elastic sleeve pad 52, thereby ensuring the stability of the connection. During the operation of the vehicle, the force generated by road bumps or engine vibrations can be absorbed and dispersed by the elastic sleeve pad 52, thereby reducing the impact directly transmitted to the housing 1 and protecting the filter from severe vibration.

[0051] The insertion hole 521 passes through the elastic sleeve 52 from top to bottom, and the top of the insertion hole 521 is trumpet-shaped to form a guiding structure. When the insertion rod 51 approaches the insertion hole 521, the trumpet-shaped opening can easily receive and guide the rod body 511 and the anti-slip portion 512 located at the end of the rod body 511 to pass through. Even in the case of poor visibility or limited operating space, the insertion rod 51 can be easily aligned and smoothly inserted into the insertion hole 521.

[0052] The elastic sleeve 52 has an annular limiting groove 522 on its circumference for assembling the elastic sleeve 52 on the mounting carrier, so that the elastic sleeve 52 can be conveniently and firmly fixed on the mounting carrier.

[0053] The plug rod 51 is arranged vertically and is integrally formed on the support ear 53, and the support ear 53 is arranged on the installation object. The plug rod 51 and the support ear 53 are integrally formed to ensure the connection strength, which helps to withstand stronger vibration and impact.

[0054] An auxiliary block 513 for connecting the lug 53 is provided at the root of the shaft 511, and the auxiliary block 513, the lug 53 and the shaft 511 are integrally formed and connected together. The auxiliary block 513 has a tapered outer profile, and a plurality of thickness reduction grooves 514 are formed on one side surface. By providing the auxiliary block 513 and arranging the thickness reduction grooves 514 on the auxiliary block 513, not only the connection strength between the shaft 511 and the lug 53 is strengthened, but also the shrinkage and deformation of the surface of the lug 53 caused by the excessive thickness of the auxiliary block 513 during the injection molding process is avoided. Specifically, during the injection molding process, the plastic material cools and solidifies from the molten state, and the volume shrinks. If this shrinkage is unevenly distributed, it may cause deformation of the product, such as distortion, depression or surface defects. Especially in areas where the wall thickness of the product varies greatly, such as relatively thick parts such as the auxiliary block 513, the internal cooling rate during the cooling process is usually slower than that of the thin-walled part, resulting in large internal residual stress, which is easy to cause local deformation and affect the appearance and assembly accuracy. The thickness-reducing groove 514 is essentially formed by digging out a portion of material from the thick part of the auxiliary block 513 to form one or more grooves, thereby suppressing the unevenness and deformation caused by the cooling and solidification process.

[0055] The radial dimension of the shaft 511 is smaller than the radial dimension of the anti-slip portion 512, and the anti-slip portion 512 occupies a range of 150° to 210° in the circumferential direction. The anti-slip portion 512 has a larger radial dimension than the shaft 511. When the insertion rod 51 is inserted into the insertion hole 521 of the elastic sleeve 52, the anti-slip portion 512 will form a physical barrier at the end of the insertion hole 521, making it more difficult for the insertion rod 51 to be dislodged. The anti-slip portion 512 can be arranged around 360° in the circumferential direction, but it is preferred to occupy a specific angular range in the circumferential direction, preferably an angular range of 150° to 210°, which is more convenient for guiding and inserting the insertion rod 51, and also has a good effect of preventing the insertion rod 51 from withdrawing in the reverse direction.

[0056] The second connecting buckle group 6 is as follows Fig.11 and Fig.12 As shown, it includes an elastic snap ring 61 arranged on the installation object, a rigid bushing 62 accommodated in the elastic snap ring 61, and a locking member 63 inserted into the rigid bushing 62. Among them, the locking member 63 is preferably a screw, a bolt, etc., which passes through the rigid bushing 62 and fixes the rigid bushing 62 on the installation carrier. The elastic snap ring 61 is made of elastic materials such as silicone and rubber, which provides an effective buffer for the shell 1; the rigid bushing 62 is made of hard materials such as stainless steel, carbon steel, and aluminum alloy, which provides a carrier foundation for the fixation of the shell 1 to withstand a strong locking force. The elastic snap ring 61, the rigid bushing 62 and the locking member 63 cooperate to achieve a connection method that is both stable and has a buffering function, ensuring the reliable installation of the air filter under complex working conditions.

[0057] The elastic snap ring 61 is provided with a central accommodating hole 611 which passes through from top to bottom and is used to accommodate the rigid bushing 62 ; an annular groove 612 is formed on the circumference of the elastic snap ring 61 and is used to be engaged in a transverse notch on the installation object.

[0058] A set of pressure-bearing buffer blocks 613 are disposed on the upper and lower surfaces of the elastic snap ring 61 around the central accommodating hole 611 , and the distance between the upper surface and the lower surface of the pressure-bearing buffer block 613 is greater than the height of the rigid bushing 62 .

[0059] When the vehicle encounters bumps or the engine vibrates during driving, the elastic snap ring 61, as an elastic element, can absorb and disperse these external forces, reducing the impact directly transmitted to the air filter housing 1. The setting of the pressure-bearing buffer block 613 further enhances this buffering ability, elastically deforms when subjected to pressure, strengthens the clamping of the transverse notch on the installation object from both sides, and reduces the risk of structural damage caused by local concentrated force.

[0060] As introduced above, the buffer connection assembly includes at least one first connection buckle group 5 and at least one second connection buckle group 6. Preferably, two first connection buckle groups 5 and one second connection buckle group 6 are provided on the shell 1, or three first connection buckle groups 5 and one second connection buckle group 6 are provided on the shell 1. Two or three first connection buckle groups 5 cooperate with one second connection buckle group 6, which can not only provide multi-point support to ensure the balance and stability of the installation of the shell 1, but also take into account the convenience and flexibility of installation. The first connection buckle group 5 is a pluggable structure, which is convenient for quick installation and disassembly, and is suitable for convenient operation during daily maintenance or replacement. The second connection buckle group 6 is fixed by a locking member 63, which provides stronger firmness and reliability, and can withstand strong vertical forces in both horizontal and vertical directions. The cooperation between the two can reduce installation time and improve efficiency while ensuring overall stability.

[0061] The above implementation modes are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with the technology in this field can understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A buffer connection assembly, attached to an installation object, used to fix the installation object on a mounting carrier, characterized in that: It comprises at least one first connecting buckle group (5) and at least one second connecting buckle group (6); The first connecting buckle assembly (5) comprises an insertion rod (51) arranged on an installation object and an elastic sleeve pad (52) arranged on an installation carrier; the insertion rod (51) comprises a rod body (511) and an anti-dropping portion (512) located at the end of the rod body (511); a through insertion hole (521) is formed on the elastic sleeve pad (52); when the insertion rod (51) and the elastic sleeve pad (52) are assembled, the rod body (511) passes through the insertion hole (521) and is confined in the insertion hole (521); The second connecting buckle assembly (6) comprises an elastic snap ring (61) arranged on the installation object, a rigid bushing (62) accommodated in the elastic snap ring (61), and a locking member (63) passing through the rigid bushing (62), wherein the locking member (63) fixes the rigid bushing (62) on the installation carrier.

2. The buffer connection assembly according to claim 1, characterized in that: The insertion hole (521) passes through the elastic sleeve (52) from top to bottom, and the top end of the insertion hole (521) is in a bell-mouth shape; and / or The elastic sleeve pad (52) has an annular limiting groove (522) on its circumferential side, which is used to assemble the elastic sleeve pad (52) on a mounting carrier.

3. The buffer connection assembly according to claim 1, characterized in that: The insertion rod (51) is arranged vertically and is integrally formed on a support ear (53); the support ear (53) is arranged on the installation object.

4. The buffer connection assembly according to claim 3, characterized in that: An auxiliary block (513) connected to the support ear (53) is provided at the root of the shaft (511); the auxiliary block (513), the support ear (53) and the shaft (511) are integrally formed and connected together.

5. The buffer connection assembly according to claim 4, characterized in that: The auxiliary block (513) has a tapered outer profile and a plurality of thickness-reducing grooves (514) are formed on a surface of one side.

6. The buffer connection assembly according to claim 1, characterized in that: The radial dimension of the shaft (511) is smaller than the radial dimension of the anti-detachment portion (512), and the anti-detachment portion (512) occupies a range of 150° to 210° in the circumferential direction.

7. The buffer connection assembly according to claim 1, characterized in that: The elastic snap ring (61) is provided with a central accommodating hole (611) which passes through from top to bottom and is used to accommodate the rigid bushing (62); an annular clamping groove (612) is formed on the circumference of the elastic snap ring (61) and is used to be clamped into a transverse notch on an installation object.

8. The buffer connection assembly according to claim 7, characterized in that: A group of pressure-bearing buffer blocks (613) are provided on the upper and lower surfaces of the elastic clamping ring (61) around the central accommodating hole (611), and the distance between the upper and lower surfaces of the pressure-bearing buffer blocks (613) is greater than the height of the rigid bushing (62).

9. An air filter, characterized in that: It comprises a shell (1), on which the buffer connection assembly according to any one of claims 1 to 8 is arranged.

10. The air filter according to claim 9, characterized in that: Two first connection buckle groups (5) and one second connection buckle group (6) are provided on the shell (1), or three first connection buckle groups (5) and one second connection buckle group (6) are provided on the shell (1).

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