Seal for an inflation and delivery system

Abstract

The utility model discloses a sealing element for an inflation and deflation system, which comprises a framework and a sealing lip main body attached to the framework, the sealing lip main body comprises an oil sealing lip and an air sealing lip, the sealing lip also comprises an anti-rust lip, the anti-rust lip is positioned on the axial inner side of the framework relative to the air sealing lip, and a first storage cavity is arranged between the anti-rust lip and the air sealing lip. By the adoption of the scheme, the anti-rust lip structure is mainly additionally arranged, the first storage cavity is filled with sealing media such as lubricating grease during installation and use, the rusting influence of water vapor on the contact portion of the air seal lip can be effectively relieved or avoided, the sealing effect can be kept, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the sealed structure field, concretely relates to a sealing element for the inflation and deflation system. BACKGROUND

[0002] The automobile tire central inflation and deflation system is a system that can detect and adjust tire air pressure at any time during automobile driving or stopping, when the automobile drives on the road surface such as desert, grassland, marsh, mud and the like, the system can adjust tire air pressure in real time, and the air pressure in each tire is controlled to improve the driving performance of the automobile on different road surfaces, so that the different needs of the automobile wheel tire air pressure on different road surfaces are met, and the passability of the automobile is improved.

[0003] The sealing element plays a crucial role in the inflation and deflation system, and can block and seal gas, oil, mud and the like, and some sealing elements on the market also focus on their sealing property and lubricity, etc., such as the patent with the patent number "201810589322.2" and the name "sealing assembly for tire inflation and deflation system" applied by the applicant early, which mainly improves the air tightness and lubricity.

[0004] The applicant found in further research that, since the inflation and deflation process is completed by the air pump, water droplets are easily condensed due to the change of pressure and temperature, and then adhere to the inflation shaft, which will eventually affect the air tightness and shorten the service life of the inflation shaft. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a sealing element for the inflation and deflation system to solve the problem that the part adjacent to the inflation hole is prone to rust in the prior art.

[0006] The technical scheme is as follows:

[0007] A sealing element for the inflation and deflation system, comprising a skeleton and a sealing lip main body attached to the skeleton, the sealing lip main body comprising an oil seal lip and an air seal lip, and the key is that the sealing lip further comprises an anti-rust lip, the anti-rust lip is on the axial inner side of the skeleton relative to the air seal lip, and a first storage cavity is formed between the anti-rust lip and the air seal lip.

[0008] By adopting the above scheme, the anti-rust lip structure is added, and the first storage cavity is filled with sealing medium such as lubricating grease during installation and use, so that even if the anti-rust lip and the shaft contact part are rusted, the sealing property between the air seal lip and the inflation shaft will not be affected, which is beneficial to maintaining the sealing effect.

[0009] As a preferred, a support lip is arranged between the oil seal lip and the air seal lip, a second storage cavity is arranged between the air seal lip and the support lip, and a third storage cavity is arranged between the oil seal lip and the support lip.

[0010] As preferred: the radially farthest end of the first storage cavity is radially inside the second storage cavity. With the above scheme, it is ensured that the second storage cavity has a larger capacity, even if the sealed medium in the first storage cavity is completely spilled, there will still be some in the second storage cavity.

[0011] As preferred: the gas seal lip extends obliquely towards the axial outside of the framework. With the above scheme, that is, the gas seal lip is designed with a reverse angle, it can better retain the grease and prevent spilling.

[0012] As preferred: the rust-proof lip extends obliquely towards the axial outside of the framework. With the above scheme, the rust-proof lip is also designed with a reverse angle, which can better retain the grease in the first storage cavity and prevent extrusion and spilling.

[0013] As preferred: the oil seal lip and the gas seal lip are respectively located on the axial two sides of the framework, and a spring ring A is embedded in the position corresponding to the gas seal lip in the main body of the sealing lip. With the above scheme, better air tightness can be ensured, and the friction between the rust-proof lip and the inflatable shaft can be avoided.

[0014] As preferred: the main body of the sealing lip has an annular groove corresponding to the position of the oil seal lip. With the above scheme, the annular groove is used to fit the spring ring B during installation, which can ensure the sealing between the oil seal lip and the inflatable shaft.

[0015] As preferred: the axial inside of the framework has an annular insertion slot. With the above scheme, it is convenient to cooperate with other sealing reinforcing parts to improve the overall sealing performance.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The sealing part for the inflation and deflation system provided by the utility model mainly adds a rust-proof lip structure, and the first storage cavity is filled with a sealing medium such as grease during installation and use, so that the rust and corrosion of the water vapor on the contact part of the gas seal lip can be effectively alleviated or avoided, the sealing effect of the gas seal lip can be maintained, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view (half-side section) of the utility model. DETAILED DESCRIPTION

[0019] The utility model will be further described in detail below in combination with the drawings.

[0020] Reference Figure 1 The sealing part for the inflation and deflation system shown mainly comprises a framework 1 and a sealing lip main body (the outline is generally as shown in the figure) attached to the framework 1. Figure 1As shown in the figure, the sealing lip body is mainly made of rubber material and is mainly attached to the axial outer side and the radial inner side of the framework 1 through the vulcanization process (it should be noted that the sealing element in this application is a ring-shaped rotary body structure, and the figure is a half-section, and in this embodiment, the installation position is used as the reference, the axial inner side is close to the gas side, and vice versa, the radial inner side is close to the inflation shaft, and vice versa). The sealing lip body includes an oil seal lip 2 and an air seal lip 3 on the radial inner side of the framework, as well as a rust-proof lip 4, as shown in the figure, the oil seal lip 2, the air seal lip 3 and the rust-proof lip 4 are sequentially distributed along the direction close to the axial inner side, that is, the rust-proof lip 4 is on the axial inner side of the framework 1 relative to the air seal lip 3, and the rust-proof lip 4 and the air seal lip 3 have a first storage cavity 40.

[0021] On this basis, in order to further improve the retention and sealing of the lubricating grease, a support lip 5 is further provided between the oil seal lip 2 and the air seal lip 3, as shown in the figure, the air seal lip 3 and the support lip 5 form a second storage cavity 30, and the oil seal lip 2 and the support lip 5 form a third storage cavity 20, and the support lip 5 is opposite to the radial inner side of the framework 1 and can bear a larger axial eccentric load without deformation, which can effectively alleviate the overflow of the lubricating grease in the second storage cavity 30 to the axial outer side.

[0022] Further, the radial farthest end of the first storage cavity 40 is on the radial inner side of the second storage cavity 30, that is, the second storage cavity 30 is deeper relative to the first storage cavity 40, which ensures that even if the lubricating grease in the first storage cavity 40 is overflowed, the second storage cavity 30 still retains part of the lubricating grease.

[0023] In implementation, in order to further improve the air tightness, the air seal lip 3 adopts a reverse angle design, specifically, the air seal lip 3 extends obliquely towards the axial outer side of the framework 1, and the support lip 5 slightly inclines towards the axial inner side, which can greatly increase the difficulty of lubricating grease overflow in the second storage cavity 30, better retain the lubricating grease, and enhance the air tightness. Similarly, the rust-proof lip 4 also adopts a reverse angle design and extends obliquely towards the axial outer side of the framework 1.

[0024] Similar to the structure of the traditional sealing element, the oil seal lip 2 and the air seal lip 3 are respectively located on the axial two sides of the framework 1, and a spring ring A 6 is embedded in the position corresponding to the air seal lip 3 in the sealing lip body. The position corresponding to the oil seal lip 2 on the sealing lip body has an annular groove 21, which is mainly used to fit a spring ring B 7, and the spring ring A 6 and the spring ring B 7 can better maintain the position of the sealing element on the inflation shaft and the adhesion between the sealing element and the inflation shaft.

[0025] In the embodiment, the thickness of the rustproof lip 4, the air seal lip 3, the support lip 5 and the oil seal lip 2 is relatively reduced in turn. Since the rustproof lip 4 mainly prevents water vapor from entering to affect the air tightness of the air seal lip 5, the rustproof lip 4 is mainly designed as a thin structure. The radial inner side of the rustproof lip 4 is higher than the air seal lip 5, but is not limited by the spring ring A6, and has better deformation, which is beneficial to reduce the friction between the rustproof lip 4 and the inflation shaft, prevent the temperature from rising too fast, and the like. It is necessary to note that the lip of the rustproof lip 4 is designed as a plane parallel to the skeleton shaft, which can increase the adhesion between the rustproof lip 4 and the inflation shaft, and is beneficial to prevent water vapor from entering.

[0026] In addition, the skeleton 1 has an annular slot 10 on the axial inner side, which is convenient for mutual buckling with the enhanced seal.

[0027] Reference Figure 1 The seal for the inflation and deflation system is shown in the figure. When installed and used, the seal is entirely sleeved on the inflation shaft. Generally, two groups are used together and symmetrically sleeved on the inflation shaft. The first storage cavity 40, the second storage cavity 30 and the third storage cavity 20 are filled with lubricating grease and other sealing media, which are mainly used for inflating and deflating tires and the air tight seal of other inflation and deflation systems.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present application. Those skilled in the art can make various similar representations under the inspiration of the present application without violating the purpose and claims of the present application. Such changes fall within the protection scope of the present application.

Claims

1. A seal for a charge and discharge system, comprising a skeleton (1) and a seal lip body attached to the skeleton (1), said seal lip body comprising an oil seal lip (2) and an air seal lip (3), characterized in that: The sealing lip further comprises an anti-rust lip (4) which is axially inside the skeleton (1) relative to the air seal lip (3), and has a first storage cavity (40) between the anti-rust lip (4) and the air seal lip (3).

2. A seal for a charge and discharge system according to claim 1, characterised in that: The oil seal lip (2) and the air seal lip (3) have a support lip (5) therebetween, the air seal lip (3) and the support lip (5) have a second storage cavity (30) therebetween, and the oil seal lip (2) and the support lip (5) have a third storage cavity (20) therebetween.

3. A seal for a charge and discharge system according to claim 2, characterised in that: The radially farthest end of the first storage cavity (40) is radially inside the second storage cavity (30).

4. A seal for a charge and discharge system as claimed in any one of claims 1 to 3, characterised in that: The air seal lip (3) extends obliquely towards the axial outside of the skeleton (1).

5. A seal for a charge and discharge system as claimed in any one of claims 1 to 3, characterised in that: The anti-rust lip (4) extends obliquely towards the axial outside of the skeleton (1).

6. A seal for a charge and discharge system according to any one of claims 1 to 3, characterized in that: The oil seal lip (2) and the air seal lip (3) are respectively located on the axial two sides of the skeleton (1), and a spring ring A (6) is embedded in the position corresponding to the air seal lip (3) in the sealing lip body.

7. A seal for a charge and discharge system as claimed in any one of claims 1 to 3, characterised in that: The sealing lip body has an annular groove (21) at the position corresponding to the oil seal lip (2).

8. A seal for a charge and discharge system as claimed in any one of claims 1 to 3, characterised in that: The axial inside of the skeleton (1) has an annular insertion slot (10).

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