Pipe fitting sealing installation mechanism and air filter

Abstract

The utility model belongs to the field of air inlet systems, and particularly relates to a pipe fitting sealing installation mechanism and an air filter. Comprising a shell, a mounting part and a breather pipe, the breather pipe is mounted on the mounting part, a mounting hole allowing the breather pipe to penetrate through is formed in the middle of the mounting part, the edge of the mounting hole protrudes towards the interior of the shell to form a sealing reinforcing part, and an inner protruding part and an outer protruding part are arranged on the peripheral face, corresponding to the interior and the exterior of the shell, of the breather pipe respectively. A caulking groove allowing the edge of the mounting hole to be inserted therein is formed between the inner convex part and the outer convex part, and a sealing reinforcing matching part corresponding to the sealing reinforcing part is arranged on the side, facing the outer convex part, of the inner convex part. The sealing performance of the connecting structure can be effectively enhanced.

Description

Technical Field

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

[0002] The air filter is part of the air intake system of cars, motorcycles, etc. Its main function is to filter out impurities or dust in the air and let clean air enter the engine cylinder. This requires that the inside of the air filter must be effectively sealed to prevent unfiltered dirty air or other foreign matter from entering the engine through the air filter. The air filter is mainly composed of an air filter body and an air outlet pipe. The air filter body is usually injection molded using PP-TD20, and the air outlet pipe is vulcanized using NBR+PVC. The existing air filter body is designed with an air outlet pipe mounting hole, and the air outlet pipe is designed with a U-shaped groove, and the two are fixed together by the groove. Usually, in order to ensure the sealing between the air outlet pipe and the air filter body, the fitting clearance between the air outlet pipe retaining rib and the air filter body is usually designed to be 0, that is, a transition fit.

[0003] The above-mentioned matching structure between the air filter outlet pipe and the air filter body can effectively ensure the sealing performance of the air filter under the conventional air filter structure. However, under special circumstances, a crankcase ventilation pipe structure is usually set after the air filter, and the oil-gas mixture in the crankcase usually enters the rear side of the air filter through the crankcase ventilation pipe. When the oil-liquid separation chamber on the rear side of the air filter is poorly designed or there is no oil-liquid separation chamber design, the oil-gas mixture will flow directly to the junction of the outlet pipe and the air filter body, and it is easy to leak from the connection between the body and the outlet pipe. This puts higher requirements on the sealing of the outlet pipe and the air filter body. The current conventional sealing structure cannot well guarantee the sealing performance here. Summary of the invention

[0004] The utility model is developed to solve the above problems, and aims to provide a pipe sealing installation mechanism which can greatly improve the sealing performance between the air filter housing and the air outlet pipe, and an air filter provided with the installation mechanism.

[0005] The utility model provides a pipe sealing installation mechanism, which is arranged on an air filter and has the following characteristics: a shell having a mounting portion, and a ventilation pipe installed on the mounting portion, wherein a mounting hole for the ventilation pipe to pass through is opened in the middle of the mounting portion, and the edge of the mounting hole protrudes toward the inside of the shell to form a sealing reinforcement portion, the ventilation pipe is respectively provided with an inner convex portion and an outer convex portion on the outer peripheral surface corresponding to the inside and outside of the shell, an embedding groove for inserting the edge of the mounting hole is provided between the inner convex portion and the outer convex portion, and a sealing reinforcement matching portion corresponding to the sealing reinforcement portion is provided on the side of the inner convex portion facing the outer convex portion.

[0006] The pipe sealing installation mechanism provided by the utility model may also have the following features: the sealing reinforcement portion is an annular retaining rib, the sealing reinforcement matching portion is an annular groove, and the annular groove is connected to the embedding groove.

[0007] The pipe sealing installation mechanism provided by the utility model may also have the following feature: an undercut portion is provided on the side of the outer convex portion facing the inner convex portion, and the undercut portion is interference fit with the installation portion.

[0008] The pipe sealing installation mechanism provided by the utility model may also have the following feature: the installation portion protrudes toward the outside of the shell to form a glue barrier rib, and a glue filling portion for filling glue is formed between the glue barrier rib and the outer protrusion.

[0009] The pipe sealing installation mechanism provided by the utility model may also have the following features: the glue filling portion is a glue filling groove in the shape of a groove, the glue coating rib is inclined toward one side of the glue filling groove, and the width of the bottom of the glue filling groove is smaller than the width of the groove opening.

[0010] The pipe sealing installation mechanism provided by the utility model may also have the following characteristics: the glue-coated retaining rib is provided with an anti-mistake portion, and the outer protrusion is provided with a limiting portion that cooperates with the anti-mistake portion.

[0011] The pipe sealing installation mechanism provided by the utility model may also have the following characteristics: the width of the annular retaining rib is 1 mm to 2.5 mm, and the thickness is 1 mm to 2.5 mm.

[0012] The pipe fitting sealing installation mechanism provided by the utility model may also have the following feature: the interference fit between the undercut portion and the installation portion is 0.5 mm to 1.5 mm.

[0013] The pipe sealing installation mechanism provided by the utility model may also have the following features: the width of the glue filling groove is 2.5mm to 3.5mm, the thickness of the glue coating rib is 1mm to 2mm, and the angle of inclination of the glue coating rib toward one side of the glue filling groove is 40° to 50°.

[0014] The utility model also proposes an air filter having the following characteristics: the air filter at least comprises a sealing installation mechanism, and the sealing installation mechanism is the pipe sealing installation mechanism as described above.

[0015] Functions and effects of utility models

[0016] The utility model provides a pipe sealing installation mechanism at a mounting portion of the air filter shell corresponding to the ventilation pipe, the mechanism is provided with a sealing reinforcement portion protruding toward the inside of the shell at the edge of the mounting hole of the mounting portion, and a sealing reinforcement matching portion is correspondingly provided on the ventilation pipe. When the ventilation pipe is installed on the mounting portion, the sealing reinforcement portion and the sealing reinforcement matching portion cooperate with each other, thereby increasing the contact area between the shell and the ventilation pipe and enhancing the sealing performance of the connection structure; at the same time, the cooperation between the two can also block the oil inside the shell, effectively solving the problem of oil leakage.

[0017] Furthermore, the outer protrusion of the vent pipe located on the outer side of the shell is designed as an undercut surface, so that the outer protrusion can form an interference fit with the edge of the mounting hole of the mounting part, which can not only enhance the firmness between the vent pipe and the mounting part but also improve the sealing performance.

[0018] Furthermore, the glue-spreading retaining rib is inclined toward one side of the glue-filling groove, and the width of the bottom of the glue-filling groove is smaller than the width of the groove opening, so that it is more convenient to fill the glue and facilitate the glue-spreading operation.

[0019] Furthermore, a limit position anti-mistake structure is designed between the ventilation pipe and the mounting portion to avoid mis-installation of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is one of the structural schematic diagrams of the pipe sealing installation mechanism of the utility model.

[0021] Figure 2 It is one of the structural exploded views of the pipe sealing installation mechanism of the utility model.

[0022] Figure 3 It is a cross-sectional view of the mounting portion of the utility model.

[0023] Figure 4 It is a cross-sectional view of the ventilation pipe of the utility model.

[0024] Figure 5 It is a cross-sectional view of the pipe sealing installation mechanism of the utility model.

[0025] Figure 6 This is the second structural schematic diagram of the pipe sealing installation mechanism of the utility model.

[0026] Figure 7 This is the second structural exploded view of the pipe sealing installation mechanism of the utility model.

[0027] Figure markings: 1-ventilation pipe; 11-cylindrical part; 12-inner convex part; 13-outer convex part-embedded groove 14; 15-sealing reinforcement matching part; 16-undercut part; 17-limiting part; 2-installation part; 21-installation hole; 22-sealing reinforcement part; 23-glue coating rib; 24-glue filling groove; 25-anti-mistake part. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments specifically illustrate the technical solutions of the present invention in conjunction with the accompanying drawings.

[0029] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of the embodiments of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in the embodiments of this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0030] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0031] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0032] <Example 1>

[0033] This embodiment provides an air filter, which at least has a pipe sealing installation mechanism, and the pipe sealing installation mechanism includes a shell and a vent pipe 1 (air outlet pipe), referring to Figure 1 The housing has a mounting portion 2, and the vent pipe 1 is mounted on the mounting portion 2 ( Figure 1 It is only a schematic diagram of the installation position of the installation part 2, and does not represent the actual shape of the installation part 2. In practice, the air filter housing has a variety of shapes, and the part where the ventilation pipe is installed is the installation part. Specifically, Figure 2 and Figure 3 As shown, a mounting hole 21 is provided in the middle of the mounting portion 2, and the vent pipe 1 is in the shape of a hollow circular tube. The vent pipe 1 passes through the mounting hole 21. The housing has an inner portion and an outer portion. Figure 2 In the figure, the upper part of the mounting part 2 is the interior of the shell, and the lower part of the mounting part 2 is the exterior of the shell. The edge of the mounting hole 21 protrudes toward the interior of the shell to form a sealing reinforcement part 22. The sealing reinforcement part 22 is an annular retaining rib integrally provided with the mounting part 2, and has a width of 1mm to 2.5mm (the width is the difference between the radius of the outer circle of the annular retaining rib and the radius of the inner circle), and a thickness of 1mm to 2.5mm (the thickness is the thickness of the annular retaining rib in the axial direction), and both are preferably 2mm.

[0034] The vent pipe 1 has a hollow cylindrical portion 11, and the outer circumference of the cylindrical portion 11 is convexly formed with an inner convex portion 12 and an outer convex portion 13 along the circumferential direction. The inner convex portion 12 and the outer convex portion 13 correspond to the inside and the outside of the shell, respectively. Figure 5 As shown, when the vent pipe 1 is installed on the mounting portion 2, the inner convex portion 12 is located inside the shell, and the outer convex portion 13 is located outside the shell. There is an embedding groove 14 between the inner convex portion 12 and the outer convex portion 13 for inserting the edge of the mounting hole 21. The inner convex portion 12 is also provided with a sealing reinforcement matching portion 15 corresponding to the sealing reinforcement portion 22 on the side facing the outer convex portion 13. The sealing reinforcement matching portion 15 is an annular groove, so that the cross section of the inner convex portion 12 is an inverted L-shape, and the annular groove is connected to the embedding groove 14. Figure 5As shown, when the vent pipe 1 is installed on the mounting portion 2, the annular retaining rib is embedded in the annular groove, so that the connection between the inner protrusion 12 and the edge of the mounting hole 21 forms a labyrinth seal, which increases the contact area between the vent pipe 1 and the mounting portion 2, thereby enhancing the sealing performance.

[0035] like Figure 4 As shown, the outer convex part 13 on the vent pipe 1 is provided with an undercut part 16 on the side facing the inner convex part 12. The undercut part 16 is in an inclined shape, so that the outer periphery (the part away from the cylindrical part 11 in the radial direction is the outer periphery) of the outer convex part 13 is thicker than the inner periphery (the part connected to the cylindrical part 11 is the inner periphery) so that it is interference-fitted with the outer side surface of the mounting part 2 (such as Figure 5 As shown), the interference fit after fitting is 0.5 mm to 1.5 mm, preferably 1 mm, to strengthen the connection between the vent pipe 1 and the mounting portion 2.

[0036] like Figure 3 As shown, the mounting portion 2 protrudes toward the outside of the housing and is formed with a glue-coated retaining rib 23, as shown in FIG. Figure 5 As shown, a glue filling portion 24 for filling glue is formed between the glue-coated retaining rib 23 and the outer protrusion 13. The glue-coated retaining rib 23 is a glue-coated groove in the shape of a groove. The glue-coated retaining rib 23 is inclined toward one side of the glue-coated groove 24, so that the width of the bottom of the glue-coated groove is smaller than the width of the groove opening. During installation, glue is filled in the glue-coated groove to further fix the mounting portion 2 and the vent pipe 1. The width of the glue-coated groove is 2.5 mm to 3.5 mm, the thickness of the glue-coated retaining rib 23 is 1 mm to 2 mm, preferably 1.5 mm, and the angle at which the glue-coated retaining rib is inclined toward one side of the glue-coated groove is 40° to 50°, preferably 45°.

[0037] In order to avoid the wrong direction during installation, the present embodiment also provides a foolproof part 25 on the glue-coated retaining rib 23, and a limit part 17 cooperating with the foolproof part 25 is provided on the outer protrusion 13. Figure 5-Figure 7 As shown, the anti-mistake part 25 is an arc-shaped convex edge protruding outward from the glue-coated retaining rib 23, and the arc-shaped convex edge is combined with the glue-filled part 24 to form a recessed part. The limiting part 17 is a convex block extending outward from the outer convex part 13 and having a shape matching the aforementioned recessed part. During installation, the convex block is installed in alignment with the recessed part to avoid installation errors (such as reverse installation of the vent pipe).

[0038] The matching structure of the ventilation pipe and the air filter housing mounting portion proposed in the above embodiment can effectively solve the problem of oil leakage at the ventilation pipe, reduce the sealing performance requirements of the glue at the connection, avoid the subsequent rework due to poor airtightness or low production efficiency due to multiple gluing, and effectively improve the overall production efficiency to ensure product quality while improving the airtightness of the product.

[0039] The above implementation modes are preferred cases of the present utility model and are not used to limit the protection scope of the present utility model. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims

1. A pipe sealing installation mechanism, arranged on an air filter, characterized in that: include: A housing having a mounting portion, a vent pipe mounted on the mounting portion, Wherein, a mounting hole is provided in the middle of the mounting portion for the ventilation pipe to pass through, and the edge of the mounting hole protrudes toward the inside of the shell to form a sealing reinforcement portion. The ventilation pipe is provided with an inner convex portion and an outer convex portion on the outer peripheral surface corresponding to the inside and the outside of the shell respectively, and an embedding groove for inserting the edge of the mounting hole is provided between the inner convex portion and the outer convex portion, and a sealing reinforcement matching portion corresponding to the sealing reinforcement portion is provided on the side of the inner convex portion facing the outer convex portion.

2. A pipe fitting sealing installation mechanism according to claim 1, characterized in that: The sealing reinforcement part is an annular retaining rib, and the sealing reinforcement matching part is an annular groove, which is communicated with the embedding groove.

3. A pipe fitting sealing installation mechanism according to claim 1, characterized in that: An undercut portion is provided on one side of the outer convex portion facing the inner convex portion, and the undercut portion is interference-fitted with the mounting portion.

4. A pipe sealing installation mechanism according to any one of claims 1 to 3, characterized in that: The mounting portion protrudes toward the outside of the shell to form a glue-coating retaining rib, and a glue-filling portion for filling glue is formed between the glue-coating retaining rib and the outer protrusion.

5. A pipe fitting sealing and installation mechanism according to claim 4, characterized in that: The glue filling portion is a glue filling groove in the shape of a groove, the glue coating retaining rib is arranged obliquely toward a side surface of the glue filling groove, and the width of the groove bottom of the glue filling groove is smaller than the width of the groove opening.

6. A pipe fitting sealing and installation mechanism according to claim 4, characterized in that: The glue-coated retaining rib is provided with an anti-mistake portion, and the outer protrusion is provided with a limiting portion that cooperates with the anti-mistake portion.

7. A pipe fitting sealing and installation mechanism according to claim 2, characterized in that: The annular retaining rib has a width of 1 mm to 2.5 mm and a thickness of 1 mm to 2.5 mm.

8. The pipe sealing installation mechanism according to claim 3, characterized in that: The interference fit between the undercut portion and the mounting portion is 0.5 mm to 1.5 mm.

9. The pipe sealing installation mechanism according to claim 5, characterized in that: The width of the glue filling groove is 2.5 mm to 3.5 mm, the thickness of the glue coating retaining rib is 1 mm to 2 mm, and the angle of inclination of the glue coating retaining rib toward one side of the glue filling groove is 40° to 50°.

10. An air filter, characterized in that: At least it comprises a sealing installation mechanism, which is a pipe sealing installation mechanism as described in any one of claims 1-9.

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