Oil seal suitable for assembling punch forming shell

Abstract

The utility model discloses an oil seal suitable for assembling a punch forming shell, which comprises an oil seal, a metal framework and a hyperelastic sealing body, and further comprises the hyperelastic sealing body, and the outer part of the hyperelastic sealing body is provided with a cross section which is a groove structure with raised grains. According to the oil seal suitable for assembling the punch-formed shell, according to contact stress generated in the assembling process and after assembling and different outer diameter sizes of raised grains of the hyperelastic external static sealing body, arc radiuses of different sizes are provided, the outer diameter of the lower end of the metal framework playing a supporting role is increased, the supporting effect on an elastic body is improved, and the service life of the elastic body is prolonged. The size change of an inner hole of the assembly shell due to the draft angle is compensated, the structural design of the outer diameter of the oil seal is provided, the requirement for normal assembly of the oil seal can be met, meanwhile, the static sealing force sealing and disengaging force of the outer diameter of the oil seal are increased by improving the static sealing structural design of the outer diameter of the oil seal, the static sealing performance of the outer diameter of the shock absorber is enhanced, and the service life of the shock absorber is prolonged. And the service life of the shock absorber is prolonged.

Description

Technical Field

[0001] The utility model relates to a shock absorber oil seal, in particular to an oil seal suitable for assembling a stamping formed shell, which belongs to the technical field of sealing parts, and is particularly suitable for the shock absorber field. Background Art

[0002] Shock absorbers are common components of motor vehicles, and the dynamic and static sealing performance of shock absorber oil seals play a vital role in the service life of shock absorbers. The close fit between the static seal of the oil seal outer diameter and the assembly housing is the key to ensure that the static seal of the oil seal does not leak.

[0003] In the "new bead oil seal for shock absorber" with the patent CN219866253U, it includes a PTFE (polytetrafluoroethylene resin) ring, a rubber matrix and a dustproof spring; the PTFE ring is a "C"-shaped ring structure, embedded in the rubber matrix, and combined with the "D"-shaped joint in the middle of the rubber to form a combined sealing part, and the combined sealing part and the sealing lip part at the bottom of the rubber together form a double seal; the dustproof spring is assembled on the dustproof lip part at the top of the rubber to provide a clamping force; the non-contact cavity with the piston rod can be coated with grease; the patent of this invention uses double sealing, which reduces sliding resistance and friction heat, improves dustproof effect, and can be used in long life, low friction, less oil loss, low noise, high dustproof and other occasions;

[0004] If the sealing force between the existing oil seal outer diameter static seal and the assembly housing is insufficient, it will cause leakage of the oil seal static seal. If the assembly release force between the oil seal outer diameter static seal and the assembly housing is small, it will also cause the oil seal to fall off from the assembly housing, resulting in serious leakage of the oil seal static seal. This problem is particularly prone to occur on the oil seal assembly housing manufactured by the stamping process. Because the draft angle required for stamping causes the assembly hole of the oil seal to have a certain draft angle, it is more likely to cause the oil seal to fall off.

[0005] Therefore, we proposed that the oil seal suitable for assembling stamped shells can solve the above problems well. Utility Model Content

[0006] The utility model aims to provide an oil seal suitable for assembling a stamped shell, so as to solve the problem raised in the above-mentioned background technology that if the sealing force between the outer diameter static seal of the existing oil seal on the market and the assembled shell is insufficient, it will cause leakage of the oil seal static seal, and the assembly release force between the outer diameter static seal of the oil seal and the assembled shell is small, which will also cause the oil seal to fall off from the assembled shell, resulting in serious leakage of the oil seal static seal. This problem is particularly prone to occur on the oil seal assembly shell manufactured by the stamping process, because the draft angle required for stamping causes the assembly hole of the oil seal to have a certain draft angle, which makes it easier for the oil seal to fall off.

[0007] To achieve the above object, the present utility model provides the following technical solutions: An oil seal applicable to an assembled stamping-formed housing, comprising a metal skeleton and a superelastic sealing body, wherein the metal skeleton and the superelastic sealing body are connected by vulcanization bonding;

[0008] It further includes: a superelastic sealing body, with a cross-section provided on its outer part, and the cross-section is a groove structure with corrugations. The groove is in interference fit with the surface of the assembled housing to form a static seal. The two sides of the assembled housing are in an inverted "L" shape. Sealing lips are provided at both ends of the superelastic sealing body, and the sealing lips include a dust-proof lip and an oil-sealing lip.

[0009] Preferably, the dust-proof lip and the oil-sealing lip are respectively located at the top and bottom of the superelastic sealing body, and the dust-proof lip and the oil-sealing lip are symmetrically arranged with respect to the horizontal center line of the superelastic sealing body.

[0010] Preferably, the structural design of the outer part of the superelastic sealing body and the rigid supporting effect of the metal skeleton achieve the effect of a lasting outer diameter static seal.

[0011] Preferably, a metal skeleton is vulcanization-bonded to the outside of the superelastic sealing body. A spring groove can be provided on the outside of the superelastic sealing body, and a metal spring is assembled in the spring groove.

[0012] Preferably, a micro-groove is provided on the inner side of the superelastic sealing body, and a superelastic sealing body is installed on the inner side of the micro-groove.

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

[0014] According to the contact stress generated during the assembly process and after assembly, the outer diameter sizes of the corrugations of the superelastic outer static sealing body are different, and different arc radii are provided. The outer diameter of the lower end of the metal skeleton serving as a support becomes larger, improving the support for the elastic body, compensating for the dimensional changes caused by the draft angle of the inner hole of the assembled housing, and providing a structural design for the outer diameter of the oil seal. While meeting the normal assembly of the oil seal, by improving the static seal structure design of the outer diameter of the oil seal, the static seal force and the disengagement force of the outer diameter of the oil seal are increased, the static seal performance of the outer diameter of the shock absorber is enhanced, and the service life of the shock absorber is improved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 is a schematic diagram of a partial structure of the present utility model.

[0017] In the figure: 1, metal skeleton; 2, superelastic sealing body; 3, assembled housing; 401, dust-proof lip; 402, oil-sealing lip; 5, micro-groove; 6, metal spring. Detailed implementation mode

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] The present utility model provides the following technical solutions:

[0020] In an embodiment, to overcome the deficiencies in the prior art, a structural design of the outer diameter of an oil seal is provided, enabling it to meet the normal assembly of the oil seal while, by improving the static seal structure design of the outer diameter of the oil seal, increasing the static seal force and extraction force of the outer diameter of the oil seal, enhancing the static seal of the outer diameter of the shock absorber, and improving the service life of the shock absorber. Disclosed are:

[0021] 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 further includes: a superelastic sealing body 2, which is externally provided with a cross-section, and the cross-section is a groove structure with a corrugated pattern. The groove is in interference fit with the surface of the assembly housing 3 to form a static seal, and both sides of the assembly housing 3 are in an inverted "L" shape. Sealing lips are provided at both ends of the superelastic sealing body 2, and the sealing lips include a dust-proof lip 401 and an oil-sealing lip 402.

[0023] The dust-proof lip 401 and the oil-sealing lip 402 are respectively located at the top and bottom of the superelastic sealing body 2, and the dust-proof lip 401 and the oil-sealing lip 402 are symmetrically arranged about the horizontal center line of the superelastic sealing body 2.

[0024] The structural design of the outside of the superelastic sealing body 2 and the rigid support of the metal skeleton 1 achieve the effect of a lasting static seal of the outer diameter. The metal skeleton 1 is vulcanization-bonded to the outside of the superelastic sealing body 2. A spring groove can be provided on the outside of the superelastic sealing body 2, and a metal spring 6 is assembled in the spring groove.

[0025] A micro-groove 5 is opened on the inner side of the superelastic sealing body 2, and the superelastic sealing body 2 is installed on the inner side of the micro-groove 5.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. All within the spirit and principles of the present invention.

[0027] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An oil seal applicable to an assembled stamping formed housing, comprising 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; It is characterized in that, Further comprising: The superelastic sealing body (2) has a cross-section on its outer side, and the cross-section is a groove structure with corrugations. The groove is in interference fit with the surface of the assembled housing (3) to form a static seal, and both sides of the assembled housing (3) are in an inverted "L" shape; Sealing lips are provided at both ends of the superelastic sealing body (2), and the sealing lips include a dust-proof lip (401) and an oil-sealing lip (402).

2. An oil seal applicable to an assembled stamping shell according to claim 1, characterized in that: The dust-proof lip (401) and the oil-sealing lip (402) are respectively located at the top and bottom of the superelastic sealing body (2), and the dust-proof lip (401) and the oil-sealing lip (402) are symmetrically arranged about the transverse center line of the superelastic sealing body (2).

3. An oil seal applicable to an assembled stamping shell according to claim 2, characterized in that: The structural design of the outer part of the superelastic sealing body (2) and the rigid supporting effect of the metal skeleton (1) achieve the effect of a lasting outer diameter static seal.

4. An oil seal applicable to an assembled stamping formed housing according to claim 3, characterized in that: The metal skeleton (1) is vulcanization-bonded to the outer side of the superelastic sealing body (2). A spring groove can be provided on the outer side of the superelastic sealing body (2), and a metal spring (6) is assembled in the spring groove.

5. The oil seal applicable to an assembled stamping formed housing according to claim 4, characterized in that: A micro-groove (5) is formed on the inner side of the superelastic sealing body (2), and the superelastic sealing body (2) is installed on the inner side of the micro-groove (5).

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