Anti-falling oil seal for shock absorber

Abstract

The utility model discloses an anti-falling oil seal for a shock absorber, which comprises a metal framework and a superelastic sealing body which are connected through vulcanization bonding, and further comprises a sealing bulge arranged at the upper end part of the superelastic sealing body, the super-elastic sealing body is provided with a sealing protrusion, the sealing protrusion makes contact with the surface of the inner wall of the upper end of the assembly shell to form sealing, the two ends of the assembly shell are both in an inverted-L shape, sealing lips are arranged at the two ends of the super-elastic sealing body, and the sealing lips comprise a dustproof lip and an oil sealing lip. According to the anti-disengaging oil seal for the shock absorber, the protrusion is designed, the sealing effect on external high-pressure gas is achieved, the acting area of the high-pressure gas is reduced, it can be known that the push-out force F = the external pressure intensity P * the acting area S, the push-out force enabling the oil seal to be disengaged is reduced, the failure risk that the oil seal is disengaged from the shell is reduced, and the production qualification rate is increased; and the service life of the shock absorber is prolonged.

Description

Technical Field

[0001] The utility model relates to an oil seal, in particular to an anti-dropout type oil seal for a shock absorber, which belongs to the technical field of sealing components and is particularly suitable for an inflatable shock absorber. Background Art

[0002] The shock absorber is a device that can attenuate vibrations. It uses its own compression and extension movements and the resistance of oil flow to consume the energy of vibrations, thereby alleviating and absorbing the impact vibrations from the road surface. Its main function is to optimize the vehicle's handling, stability and comfort. It reduces vibrations and impacts, making the vehicle run more smoothly and improving riding comfort and safety. The shock absorber oil seal is a key component in the shock absorber that is used to seal the oil and prevent it from leaking. It not only effectively prevents the oil in the shock absorber from leaking, ensuring that the oil circulates in the shock absorber to generate the necessary damping force, but also prevents external impurities such as dust and dirt from entering the shock absorber, protecting the normal operation of the shock absorber.

[0003] In the "Oil seal and shock absorber" disclosed in the patent CN221145142U, it includes: a dust lip with multiple annular lips, each of which protrudes toward the central axis of the oil seal, and an oil storage ring groove is formed between adjacent annular lips; a support ring is arranged on the inner wall of the oil seal to support the dust lip. The oil seal of the utility model enhances the sealing effect of the dust lip through the dust lip with multiple annular lips and the support ring supporting the dust lip, effectively blocks the gas from entering the interior of the shock absorber, and improves the structural strength of the dust lip. When the oil seal is assembled to the shock absorber, it ensures that the annular lip of the dust lip and the piston rod of the shock absorber maintain low friction and stable contact, and can return the shock absorber oil stretched out to the interior of the shock absorber to avoid oil leakage;

[0004] In order to improve the response speed and comfort of the shock absorber, the existing shock absorber is inflated when in use. However, during the inflation process, the external air pressure directly acts on the upper end surface of the oil seal, which can easily cause the assembled oil seal to fall off from the assembly housing, resulting in oil seal leakage.

[0005] Therefore, we proposed that the anti-dropout type oil seal for shock absorber can solve the above problems well. Utility Model Content

[0006] The utility model aims to provide an anti-dropping oil seal for a shock absorber, so as to solve the problem in the current market proposed by the above-mentioned background technology that during the inflation process, the external air pressure directly acts on the upper end face of the oil seal, which easily causes the assembled oil seal to fall off from the assembly housing, resulting in oil seal leakage.

[0007] To achieve the above object, the utility model provides the following technical solution: an anti-dropout type oil seal for a shock absorber, comprising a metal frame and a superelastic sealing body, wherein the metal frame and the superelastic sealing body are connected by vulcanization bonding;

[0008] It also includes: a sealing protrusion is provided at the upper end of the super elastic sealing body, and the sealing protrusion contacts the inner wall surface of the upper end of the assembly shell to form a seal, wherein both ends of the assembly shell are in an inverted "L" shape, and sealing lips are provided at both ends of the super elastic sealing body, wherein the sealing lips include dustproof lips and oil sealing lips.

[0009] Preferably, the dust lip and the oil sealing lip are respectively located at the top and bottom ends of the superelastic sealing body, and the dust lip and the oil sealing lip are symmetrically arranged about the vertical center line of the assembly housing.

[0010] Preferably, the radial cross-section of the sealing protrusion is arc-shaped, triangular and trapezoidal, so as to achieve a durable and effective effect of sealing the external gas.

[0011] Preferably, a metal skeleton is vulcanized and bonded inside the superelastic sealing body, wherein two spring grooves are arranged outside the superelastic sealing body, and metal springs are installed in the two spring grooves, and the two metal springs are symmetrically arranged about the vertical center line of the assembly shell.

[0012] Preferably, the superelastic sealing body is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber and polyurethane.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] By designing the bulge, a sealing effect is produced on the external high-pressure gas, reducing the effective area of ​​the high-pressure gas. From the pushing force F = external pressure P * effective area S, it can be seen that the pushing force that causes the oil seal to fall out is reduced, reducing the failure risk of the oil seal falling out of the housing, improving the production qualification rate, and extending the service life of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of the utility model.

[0017] In the figure: 1. metal frame; 2. super elastic sealing body; 3. sealing protrusion; 401. dustproof lip; 402. oil sealing lip; 5. assembly housing; 6. metal spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] This utility provides the following technical solutions:

[0020] The embodiment seals the high-pressure gas during the inflation process, reduces the effective area of ​​the high-pressure gas, reduces the thrust generated by the inflation gas, prevents the oil seal from escaping from the assembly housing 5 after assembly, improves the qualified rate of the production process, and prolongs the service life of the shock absorber. The invention discloses:

[0021] It comprises a metal skeleton 1 and a superelastic sealing body 2, wherein the metal skeleton 1 and the superelastic sealing body 2 are connected by vulcanization bonding;

[0022] It also includes: a sealing protrusion 3 is provided at the upper end of the super elastic sealing body 2, and the sealing protrusion 3 contacts the inner wall surface of the upper end of the assembly shell 5 to form a seal, wherein both ends of the assembly shell 5 are in an inverted "L" shape, and sealing lips are provided at both ends of the super elastic sealing body 2, wherein the sealing lips include a dustproof lip 401 and an oil sealing lip 402.

[0023] The dustproof lip 401 and the oil-sealing lip 402 are respectively located at the top and bottom ends of the superelastic sealing body 2. At the same time, the dustproof lip 401 and the oil-sealing lip 402 are symmetrically arranged about the vertical center line of the assembly shell 5. The radial cross-section of the sealing protrusion 3 is arc-shaped, triangular and trapezoidal, thereby achieving a long-lasting and effective effect of sealing external gas.

[0024] A metal skeleton 1 is vulcanized and bonded to the inner side of the super-elastic sealing body 2, wherein two spring grooves are arranged on the outer side of the super-elastic sealing body 2, and metal springs 6 are installed in the two spring grooves, and the two metal springs 6 are symmetrically arranged about the vertical center line of the assembly shell 5. The super-elastic sealing body 2 is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber and polyurethane.

[0025] like Figure 1-Figure 2 As shown, the novel low-friction shock absorber dust seal forms a seal between the sealing protrusion 3 and the assembly shell 5, thereby sealing the external high-pressure gas inside the sealing protrusion 3, reducing the effective area of ​​the high-pressure gas, reducing the thrust generated by the inflation gas, and preventing the oil seal from escaping from the assembly shell 5 after assembly, thereby improving the qualified rate of the production process and extending the service life of the shock absorber.

[0026] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention is described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-dropout type oil seal for a shock absorber, comprising a metal frame (1) and a superelastic sealing body (2), wherein the metal frame (1) and the superelastic sealing body (2) are connected by vulcanization bonding; It is characterized in that Also includes: The upper end of the superelastic sealing body (2) is provided with a sealing protrusion (3), and the sealing protrusion (3) contacts the inner wall surface of the upper end of the assembly shell (5) to form a seal, wherein both ends of the assembly shell (5) are in an inverted "L" shape; Sealing lips are provided at both ends of the superelastic sealing body (2), wherein the sealing lips include a dustproof lip (401) and an oil sealing lip (402).

2. The anti-dropout type oil seal for shock absorber according to claim 1, characterized in that: The dustproof lip (401) and the oil-sealing lip (402) are respectively located at the top and bottom of the superelastic sealing body (2), and the dustproof lip (401) and the oil-sealing lip (402) are symmetrically arranged about the vertical center line of the assembly shell (5).

3. The anti-dropout type oil seal for shock absorber according to claim 1, characterized in that: The radial cross-section of the sealing protrusion (3) is arc-shaped, triangular and trapezoidal, so as to achieve a durable and effective sealing effect on external gas.

4. The anti-dropout type oil seal for shock absorber according to claim 1, characterized in that: A metal frame (1) is vulcanized and bonded to the inner side of the superelastic sealing body (2), wherein two spring grooves are arranged on the outer side of the superelastic sealing body (2), and metal springs (6) are installed in the two spring grooves, and the two metal springs (6) are symmetrically arranged about the vertical center line of the assembly shell (5).

5. The anti-dropout type oil seal for shock absorber according to claim 1, characterized in that: The super elastic sealing body (2) is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber and polyurethane.

Images