Air filter element sealing structure with axial relief

Abstract

The utility model relates to an air filter element sealing structure of axial concave-convex, include: upper end cover, paper core, center tube and lower end cover, the circumference sealing place of upper end cover is equipped with axial concave-convex structure, and axial concave-convex structure includes the first recess that sets up on the upper end cover and the first protruding that sets up in the corresponding position of casing, compared with prior art, the utility model has axial concave-convex structure positioning design, realizes accurate positioning, has the mistake -proof function, and the sealing performance promotes, and the advantages such as structure stability optimization.

Description

Technical Field

[0001] This utility model relates to the field of air filter technology, and in particular to an axially concave-convex air filter sealing structure. Background Technology

[0002] An air filter cartridge typically consists of a central tube, an upper end cap, a lower end cap, and a paper core. The paper core is usually sealed by the upper and lower end caps to prevent unfiltered air from the dirty side from entering the clean side through the upper and lower end faces of the paper core. The open end generally uses a sealing structure with a uniform height.

[0003] In existing technologies, PU end caps with open ends commonly employ a radially arranged concave-convex structure to achieve error prevention. This structure features protrusions or recesses along the circumference of the filter element, achieving positioning through radial engagement. This technology is widely used in commercial vehicles, construction machinery, and air compressors, and is currently the mainstream design solution in the industry.

[0004] Patent CN202420586375.X discloses an air filter element and an air purifier. The air filter element includes a filter cartridge with a first end cap fixed at one end and a second end cap fixed at the other end. The portion of the second end cap corresponding to the filter cartridge port is a central closure portion. The central closure portion has a protrusion extending axially along the filter cartridge and away from the first end cap. The central closure portion also has an annular recess surrounding the protrusion. The protrusion and the annular recess are integrally connected and both are made of rubber. The protrusion and the annular recess are designed to deform under pressure. By making the central closure portion for closing the air filter cartridge port a rubber material, the central closure portion not only provides a sealing function but also more effectively avoids interfering components within the air purifier. When interfering components deform or vibrate and shift, the protrusion and the annular recess can adaptively deform to make room and prevent abnormal noise. However, the structure is relatively complex, requires high installation precision, and improper installation may lead to seal failure.

[0005] Existing technologies have limited error prevention effects, and radial concave-convex structures are prone to the following problems during installation: inaccurate positioning, with the possibility of slight misalignment; easy displacement under vibration; high requirements for manufacturing tolerances; and insufficient sealing performance.

[0006] Traditional sealing methods have the following drawbacks: the contact area of ​​a single-height sealing ring is limited; multiple sealing barriers cannot be formed; and sealing failure is likely to occur after long-term use. Utility Model Content

[0007] The purpose of this utility model is to overcome the defects of the existing technology by providing an axially concave-convex air filter sealing structure. The axially concave-convex structure positioning design achieves precise positioning, has a mis-proof function, improves sealing performance, and optimizes structural stability.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] This invention adds an axial concave-convex structure to the circumferential sealing area of ​​the upper cover, which matches the corresponding concave-convex structure on the housing. This allows for the positioning of the filter element, preventing misalignment, and providing a sealing function. Currently available concave-convex structures for misalignment prevention are generally radially oriented; this invention places the concave-convex structure axially.

[0010] This utility model provides an axially concave-convex air filter sealing structure, including: an upper end cap, a paper core, a central tube, and a lower end cap;

[0011] The circumferential sealing part of the upper end cover is provided with an axial concave-convex structure, which includes a first groove on the upper end cover and a first protrusion at the corresponding position on the housing.

[0012] Furthermore, the first groove on the end cap matches the first protrusion at the corresponding position on the housing.

[0013] Furthermore, the first groove is provided on the PU adhesive of the upper end cap.

[0014] Furthermore, the number of the first grooves and the first protrusions are the same and their positions correspond.

[0015] Furthermore, the convex-concave direction of the axial concave-convex structure is parallel to the filter element axis.

[0016] Furthermore, the axial concave-convex structure includes at least three uniformly distributed first grooves.

[0017] Furthermore, the cross-section of the first groove has a trapezoidal structure.

[0018] Furthermore, the cross-section of the first protrusion has a wedge-shaped structure.

[0019] Furthermore, the second protrusion on the upper end cover matches the second groove on the housing.

[0020] Furthermore, the fit clearance between the first groove and the first protrusion is 0.1-0.3mm, forming an interference fit.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) Axial concave-convex structure positioning design achieves precise positioning and has a simple structure. The precise positioning of the filter element and the shell is achieved by the axial concave-convex structure (instead of the traditional radial concave-convex structure), which solves the problem of inconvenient installation of the traditional radial concave-convex structure.

[0023] (2) Error prevention function. The concave-convex mating structure can effectively prevent the filter element from being installed incorrectly into the special housing. When the filter element does not have the corresponding concave-convex structure, it cannot be installed or there is a risk of leakage.

[0024] (3) Improved sealing performance. The axial concave-convex structure enhances the sealing effect while achieving positioning. The tight fit between the PU groove and the shell protrusion forms multiple sealing barriers.

[0025] (4) Structural stability optimization. The axially arranged concave-convex structure of the assembly section can better withstand axial forces during the operation of the filter element, reducing the risk of displacement. Attached Figure Description

[0026] Figure 1 A schematic diagram of the axially concave-convex air filter sealing structure;

[0027] Figure 2 This is a schematic diagram of the first groove and the second protrusion;

[0028] Figure 3 This is a cross-sectional view of the assembly (filter element and housing);

[0029] Figure 4 A cross-sectional view showing the fit between the second protrusion and the second groove;

[0030] Figure 5 A cross-sectional view showing the mating of the first groove and the first protrusion;

[0031] Reference numerals: 1-Upper end cover, 2-Paper core, 3-Central tube, 4-Lower end cover, 5-Shell, 6-First groove, 7-First protrusion, 8-Second protrusion, 9-Second groove. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0033] Example 1

[0034] This utility model provides an axially concave-convex air filter sealing structure, such as... Figure 1-5 As shown, it includes: upper end cover 1, paper core 2, central tube 3 and lower end cover 4;

[0035] The circumferential sealing part of the upper end cover 1 is provided with an axial concave-convex structure, which includes a first groove 6 provided on the upper end cover 1 and a first protrusion 7 provided at the corresponding position of the housing 5.

[0036] Example 2

[0037] This utility model provides an axially concave-convex air filter sealing structure, such as... Figure 1-5 As shown, it includes: upper end cover 1, paper core 2, central tube 3 and lower end cover 4;

[0038] The circumferential sealing part of the upper end cover 1 is provided with an axial concave-convex structure, which includes a first groove 6 provided on the upper end cover 1 and a first protrusion 7 provided at the corresponding position of the housing 5.

[0039] In a specific embodiment, the first groove 6 on the end cap 1 matches the first protrusion 7 at the corresponding position on the housing 5.

[0040] In a specific embodiment, the first groove 6 is disposed on the PU adhesive of the upper end cover 1.

[0041] In a specific implementation, the number of the first groove 6 and the first protrusion 7 are the same and their positions correspond.

[0042] In a specific embodiment, the convex and concave directions of the axial concave-convex structure are parallel to the filter element axis.

[0043] In a specific embodiment, the axial concave-convex structure includes at least three uniformly distributed first grooves 6.

[0044] In a specific embodiment, the cross-section of the first groove 6 is trapezoidal.

[0045] In a specific embodiment, the cross-section of the first protrusion 7 is wedge-shaped.

[0046] like Figure 4 As shown, in a specific embodiment, the second protrusion 8 on the upper cover 1 matches the second groove 9 on the housing 5.

[0047] In a specific embodiment, the fitting clearance between the first groove 6 and the first protrusion 7 is 0.1-0.3mm, forming an interference fit.

[0048] The axial concave-convex structure positioning design achieves precise positioning. By using an axial concave-convex structure (rather than the traditional radial concave-convex structure), precise positioning of the filter element and housing is achieved, solving the installation inconvenience problem associated with traditional radial concave-convex structures. Error prevention function: The concave-convex mating structure effectively prevents the filter element from being incorrectly installed into the dedicated housing. When the filter element does not have the corresponding concave-convex structure, installation cannot be completed or there is a risk of leakage. Improved sealing performance: The axial concave-convex structure enhances the sealing effect while achieving positioning. The tight fit between the PU adhesive groove and the housing protrusion forms multiple sealing barriers. Optimized structural stability: The assembly cross-sectional structure, with its axially arranged concave-convex structure, better withstands axial forces during filter element operation, reducing the risk of displacement.

[0049] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0050] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. An axially recessed and convex air filter sealing structure, comprising: The upper end cap (1), paper core (2), central tube (3), and lower end cap (4) are characterized in that, The upper end cover (1) has an axial concave-convex structure at its circumferential sealing point. The axial concave-convex structure includes a first groove (6) on the upper end cover (1) and a first protrusion (7) at a corresponding position on the housing (5).

2. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The first groove (6) on the end cap (1) matches the first protrusion (7) at the corresponding position on the housing (5).

3. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The first groove (6) is set on the PU adhesive of the upper end cover (1).

4. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The number of the first groove (6) and the first protrusion (7) are the same and their positions correspond.

5. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The convex and concave directions of the axial concave-convex structure are parallel to the axial direction of the filter element.

6. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The axial concave-convex structure includes at least three uniformly distributed first grooves (6).

7. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The first groove (6) has a trapezoidal cross-section.

8. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The first protrusion (7) has a wedge-shaped cross-section.

9. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The second protrusion (8) on the upper end cover (1) matches the second groove (9) on the housing (5).

10. The axially concave-convex air filter sealing structure according to claim 1, characterized in that, The fit clearance between the first groove (6) and the first protrusion (7) is 0.1-0.3mm, forming an interference fit.

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