Inverted shock absorber oil seal capable of preventing high pressure

Abstract

The utility model discloses an inverted anti-high-pressure shock absorber oil seal, which relates to the technical field of shock absorbers and comprises an oil seal main body, an outer sealing lip is arranged at the bottom end of the oil seal main body, an oil seal framework is arranged in the oil seal main body, and a high-pressure sealing lip is arranged at the top end of the oil seal main body. A high-pressure oil cavity is formed between the oil seal framework and the high-pressure sealing lip. When the inverted shock absorber inner cylinder moves upwards, the internal space of the shock absorber is compressed, the internal pressure is increased, the impact force of shock absorber oil on the oil seal is increased, the high-pressure sealing lip plays a role in pressure resistance, pressure relief and guide, the larger the pressure is, the larger the holding force of the high-pressure sealing lip on the shock absorber inner cylinder is, and the sealing capacity is improved; and shock absorber oil in the high-pressure oil cavity applies radial force to the high-pressure sealing lip, and meanwhile, the sealing effect of the high-pressure sealing lip is improved, so that the overall pressure resistance of the oil seal is improved, and the sealing effect can be improved by 5-8 times compared with a traditional shock absorber oil seal.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, and more specifically, to a shock absorber oil seal for inverted high-pressure prevention. Background Technique

[0002] The existing inverted shock absorber oil seals in the market are generally the same as the conventional shock absorber oil seals. As Figure 1 shown, their structures cannot meet the actual operating conditions of inverted shock absorbers. Conventional shock absorber oil seals have low pressure resistance. When not in use, they are not in contact with the shock absorber oil. During the movement process, they only seal the oil brought out by the inner cylinder of the shock absorber, and the internal pressure protection range of the shock absorber is 0.3 - 0.5 MPA.

[0003] The design of inverted shock absorbers is very different from that of conventional shock absorbers. The operating conditions of the oil seal are mainly manifested in that the shock absorber oil is in a completely contact state with the oil seal, and the shock absorber oil seal also needs to meet the sealing requirements when not in use. Due to the special design of inverted shock absorbers, their shock absorption effect is more excellent and the driving experience is more comfortable. The internal pressure protection range of the shock absorber is 0.8 - 1.2 MPA, and it has obvious effects when used in heavy motorcycles.

[0004] Conventional shock absorber oil seals are difficult to meet the design requirements of inverted shock absorbers. They cannot provide higher internal pressure protection capabilities and cannot effectively ensure the safety and stability of the vehicle and the shock absorber during the driving process. Because the shock absorber will generate high temperature during high-speed movement, and the internal pressure increases; high stroke will cause the internal space of the shock absorber to be compressed, and at the same time increase the internal pressure. The shock absorber oil under high pressure flows along the cut position of the oil seal, generating a high-pressure impact force on the main lip of the oil seal, and the radial forces of the spring and rubber cannot effectively protect against the high-pressure oil, resulting in the failure of the shock absorber oil seal and potential safety hazards due to the failure of the shock absorber.

[0005] Regarding the problems in the related technology, no effective solution has been proposed yet. Summary of the Utility Model

[0006] Regarding the problems in the related technology, the utility model proposes a shock absorber oil seal for inverted high-pressure prevention to overcome the above-mentioned technical problems existing in the existing related technology.

[0007] For this reason, the specific technical solution adopted by the utility model is as follows:

[0008] A shock absorber oil seal for inverted high-pressure prevention includes an oil seal main body. An outer sealing lip is provided at the bottom end of the oil seal main body, an oil seal skeleton is provided inside the oil seal main body, and a high-pressure sealing lip is provided at the top end of the oil seal main body; a high-pressure oil cavity is provided between the oil seal skeleton and the high-pressure sealing lip.

[0009] Furthermore, in order to improve the adaptability of the oil seal body to the outer cylinder of the shock absorber while ensuring the effectiveness of the static seal, a wavy groove surface is provided at the bottom of the outer circumference of the oil seal body.

[0010] Furthermore, in order to improve the sealing performance of the shock absorber oil seal to the inner cylinder of the shock absorber, while improving the contact effect and avoiding deformation caused by long-term movement, an outer reinforcement groove is provided at the bottom of the outer circumference of the outer sealing lip, and an outer reinforcement spring is sleeved on the outer circumference of the outer reinforcement groove.

[0011] Furthermore, in order to improve the supporting force of the vertical skeleton on the high-pressure sealing lip, ensure that the sealing surface of the high-pressure sealing lip can continuously and effectively contact the surface of the inner cylinder of the shock absorber, and improve the sealing effect, the oil seal skeleton includes a horizontal skeleton horizontally arranged at the inner bottom of the oil seal body, a vertical skeleton is arranged at the top of the horizontal skeleton, and the horizontal skeleton and the vertical skeleton are integrally formed and form an L-shaped structure.

[0012] Furthermore, in order to prevent shock absorber oil from entering between the high-pressure sealing lip and the inner cylinder of the shock absorber, all the shock absorber oil is introduced into the high-pressure oil cavity, increasing the radial force of the high-pressure sealing lip on the inner cylinder of the shock absorber and improving the sealing effect. The bottom to the top of the high-pressure sealing lip gradually approaches the center of the oil seal body, and the vertical distance from the top of the high-pressure sealing lip to the horizontal skeleton is greater than the height of the vertical skeleton.

[0013] Furthermore, in order to further increase the radial force of the high-pressure sealing lip on the inner cylinder of the shock absorber, enhance the sealing effect, and improve the structural stability of the shock absorber oil seal, a high-pressure reinforcement groove is provided at the bottom of the high-pressure sealing lip, and an oil seal spring is sleeved on the outer circumference of the high-pressure reinforcement groove.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. When the inverted inner cylinder of the shock absorber moves upward, the internal space of the shock absorber is compressed, the internal pressure increases, and the impact force of the shock absorber oil on the oil seal increases. The high-pressure sealing lip plays a pressure-resistant and pressure-relieving guiding role. The greater the pressure, the greater the clamping force of the high-pressure sealing lip on the inner cylinder of the shock absorber, increasing the sealing ability; and the shock absorber oil in the high-pressure oil cavity exerts a radial force on the high-pressure sealing lip, while increasing the sealing effect of the high-pressure sealing lip, thereby improving the overall pressure-resistant performance of the oil seal. Compared with the traditional shock absorber oil seal, the sealing effect can be improved by 5-8 times.

[0016] 2. By adding an outer reinforcement spring outside the outer sealing lip of the oil seal body, the sealing performance of the inverted shock absorber oil seal can be further improved. While ensuring the overall strength of the oil seal, external contamination is prevented from entering, enhancing the safety and stability of the inverted shock absorber oil seal. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a conventional shock absorber oil seal in the prior art;

[0019] Figure 2 is a cross-sectional view of an inverted high-pressure-proof shock absorber oil seal according to an embodiment of the present invention;

[0020] Figure 3 is a partial cross-sectional view of the oil seal body in an inverted high-pressure-proof shock absorber oil seal according to an embodiment of the present invention;

[0021] Figure 4 is an assembly drawing of an inverted high-pressure-proof shock absorber oil seal in an inverted shock absorber according to an embodiment of the present invention.

[0022] In the figure:

[0023] 1. Oil seal body; 2. Outer sealing lip; 3. Oil seal skeleton; 301. Horizontal skeleton; 302. Vertical skeleton; 4. High-pressure sealing lip; 5. High-pressure oil cavity; 6. Wavy groove surface; 7. Outer reinforcement groove; 8. Outer reinforcement spring; 9. High-pressure reinforcement groove; 10. Oil seal spring. Specific embodiments

[0024] To further illustrate the embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] According to an embodiment of the present invention, an inverted high-pressure-proof shock absorber oil seal is provided.

[0026] Now, the present invention will be further described in combination with the drawings and specific embodiments. As Figures 2 - 3 shown, the inverted high-pressure-proof shock absorber oil seal according to an embodiment of the present invention includes an oil seal body 1. An outer sealing lip 2 is provided at the bottom end of the oil seal body 1. An oil seal skeleton 3 is provided inside the oil seal body 1. A high-pressure sealing lip 4 is provided at the top end of the oil seal body 1; a high-pressure oil cavity 5 is provided between the oil seal skeleton 3 and the high-pressure sealing lip 4.

[0027] With the above technical solution, when the inner tube of the inverted shock absorber moves upward, the internal space of the shock absorber is compressed, the internal pressure increases, and the impact force of the shock absorber oil on the oil seal increases. The high-pressure sealing lip 4 plays a role in pressure resistance, pressure relief and guidance. The greater the pressure, the greater the holding force of the high-pressure sealing lip 4 on the inner tube of the shock absorber, increasing the sealing ability. The shock absorber oil inside the high-pressure oil chamber 5 exerts a radial force on the high-pressure sealing lip 4, and at the same time increases the sealing effect of the high-pressure sealing lip 4, thereby improving the overall pressure resistance performance of the oil seal. Compared with the traditional shock absorber oil seal, the sealing effect can be improved by 5-8 times. By adding an outer reinforcement spring 8 outside the outer sealing lip 2 of the oil seal body 1, the sealing performance of the inverted shock absorber oil seal can be further improved. While ensuring the overall strength of the oil seal, it can prevent external contamination from entering and enhance the safety and stability of the inverted shock absorber oil seal.

[0028] In one embodiment, for the above-mentioned oil seal body 1, a wavy groove surface 6 is provided at the bottom of the outer circumference of the oil seal body 1, thereby improving the adaptability of the oil seal body 1 to the outer tube of the shock absorber while ensuring the effectiveness of static sealing.

[0029] In one embodiment, for the above-mentioned outer sealing lip 2, an outer reinforcement groove 7 is opened at the bottom of the outer circumference of the outer sealing lip 2, and an outer reinforcement spring 8 is sleeved on the outer circumference of the outer reinforcement groove 7, thereby improving the sealing performance of the shock absorber oil seal for the inner tube of the shock absorber, improving the contact effect and avoiding deformation during long-term movement.

[0030] In one embodiment, for the above-mentioned oil seal skeleton 3, the oil seal skeleton 3 includes a horizontal skeleton 301 horizontally arranged at the inner bottom of the oil seal body 1, and a vertical skeleton 302 is provided at the top of the horizontal skeleton 301. The horizontal skeleton 301 and the vertical skeleton 302 are integrally formed and form an L-shaped structure, thereby improving the supporting force of the vertical skeleton 302 on the high-pressure sealing lip 4, ensuring that the sealing surface of the high-pressure sealing lip 4 and the surface of the inner tube of the shock absorber can be in continuous and effective contact, and improving the sealing effect.

[0031] In one embodiment, for the above-mentioned, the bottom to the top of the high-pressure sealing lip 4 gradually approaches the center of the oil seal body 1, and the vertical distance from the top of the high-pressure sealing lip 4 to the horizontal skeleton 301 is greater than the height of the vertical skeleton 302, thereby preventing the shock absorber oil from entering between the high-pressure sealing lip 4 and the inner tube of the shock absorber, introducing all the shock absorber oil into the high-pressure oil chamber 5, increasing the radial force of the high-pressure sealing lip 4 on the inner tube of the shock absorber, and improving the sealing effect.

[0032] In one embodiment, for the above-mentioned high-pressure sealing lip 4, a high-pressure reinforcement groove is opened at the bottom of the high-pressure sealing lip 4, and an oil seal spring 10 is sleeved on the outer circumference of the high-pressure reinforcement groove 9, thereby further increasing the radial force of the high-pressure sealing lip 4 on the inner tube of the shock absorber, enhancing the sealing effect, and improving the structural stability of the shock absorber oil seal.

[0033] To facilitate the understanding of the above technical solution of the present utility model, the working principle or operation mode of the present utility model in the actual process will be described in detail below.

[0034] In actual application, as Figure 4 shown, the shock absorber oil seal is sleeved on the inner cylinder of the shock absorber, and then the outer cylinder of the shock absorber is arranged outside the shock absorber oil seal, so that the outside of the oil seal body 1 contacts the outer cylinder of the shock absorber. And there is shock absorber oil between the outer cylinder of the shock absorber and the inner cylinder of the shock absorber. During use, the shock absorber oil will continuously impact the shock absorber oil seal, and the top of the high-pressure sealing lip 4 always contacts the inner cylinder of the shock absorber. The shock absorber oil will flow into the high-pressure oil chamber 5 along the cutting direction of the high-pressure sealing lip 4, generating a radial force on the outside of the oil seal body 1 and the high-pressure sealing lip 4, which can effectively improve the sealing performance of the high-pressure sealing lip 4 on the inner cylinder of the shock absorber.

[0035] In summary, by means of the above technical solution of the present utility model, when the inverted inner cylinder of the shock absorber moves upward, the internal space of the shock absorber is compressed, the internal pressure increases, and the impact force of the shock absorber oil on the oil seal increases. Through the pressure-resistant and pressure-relieving guiding function of the high-pressure sealing lip 4, the greater the pressure, the greater the clamping force of the high-pressure sealing lip 4 on the inner cylinder of the shock absorber, increasing the sealing ability; and the shock absorber oil in the high-pressure oil chamber 5 exerts a radial force on the high-pressure sealing lip 4, while increasing the sealing effect of the high-pressure sealing lip 4, thereby improving the overall pressure-resistant performance of the oil seal. Compared with the traditional shock absorber oil seal, the sealing effect can be improved by 5-8 times. By adding an outer reinforcement spring 8 outside the outer sealing lip 2 of the oil seal body 1, the sealing performance of the inverted shock absorber oil seal can be further improved. While ensuring the overall strength of the oil seal, it can prevent external pollution from entering and enhance the safety and stability of the inverted shock absorber oil seal.

[0036] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An inverted shock absorber oil seal for preventing high pressure, comprising an oil seal body (1), characterized in that, The bottom end of the oil seal body (1) is provided with an outer sealing lip (2), an oil seal skeleton (3) is arranged inside the oil seal body (1), and a high-pressure sealing lip (4) is arranged at the top end of the oil seal body (1); A high-pressure oil cavity (5) is arranged between the oil seal skeleton (3) and the high-pressure sealing lip (4).

2. The shock absorber oil seal with inverted high-pressure prevention according to claim 1, characterized in that, A wavy groove surface (6) is arranged at the bottom of the outer circumference of the oil seal body (1).

3. The shock absorber oil seal with inverted high-pressure prevention according to claim 1, characterized in that, An outer reinforcement groove (7) is formed at the bottom of the outer circumference of the outer sealing lip (2), and an outer reinforcement spring (8) is sleeved on the outer circumference of the outer reinforcement groove (7).

4. The shock absorber oil seal with inverted high-pressure prevention according to claim 1, characterized in that, The oil seal skeleton (3) includes a horizontal skeleton (301) horizontally arranged at the inner bottom of the oil seal body (1), a vertical skeleton (302) is arranged at the top of the horizontal skeleton (301), and the horizontal skeleton (301) and the vertical skeleton (302) are integrally formed by an integral molding process and form an L-shaped structure.

5. A shock absorber oil seal with inverted high-pressure prevention according to claim 4, characterized in that, The bottom to the top of the high-pressure sealing lip (4) gradually approaches the center of the oil seal body (1), and the vertical distance from the top end of the high-pressure sealing lip (4) to the horizontal skeleton (301) is greater than the height of the vertical skeleton (302).

6. The shock absorber oil seal with inverted high-pressure prevention according to claim 1 or 3, characterized in that, A high-pressure reinforcement groove (9) is formed at the bottom of the high-pressure sealing lip (4), and an oil seal spring (10) is sleeved on the outer circumference of the high-pressure reinforcement groove (9).

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