Spring sealing cover structure and shock absorber

Abstract

The utility model belongs to the technical field of sealing elements for shock absorbers, and particularly relates to a spring sealing cover structure and a shock absorber, the spring sealing cover structure comprises a cylindrical cover body and a sealing lip arranged on the cover body, the sealing lip comprises a main lip and an auxiliary lip, the main lip is located at the end of the cover body, and the auxiliary lip is located on the inner side of the cover body. The main lip extends in the direction opposite to the inner cavity of the cover body in the axial direction of the cover body, and the spring is arranged on the outer wall of the main lip, so that the problem of dust prevention failure caused by force value attenuation of a lip of an existing full-rubber dust cover can be solved, the dust prevention effect of the dust cover is improved, the service life of the dust cover is prolonged, and abrasion of a shock absorber is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seals for shock absorbers, and particularly relates to a spring seal cover structure and a shock absorber. Background Art

[0002] Existing dust covers are basically pure rubber structures. For example, a multi-lip dust cover disclosed in Chinese Patent Document CN202790296U (201220473199.6) has a small lip clamping force. Once the lip clamping force decays, it cannot be well compensated, resulting in seal failure. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a spring seal cover structure and a shock absorber, to improve the inherent structure, add a spring at the main lip to increase the clamping force of the main lip, be able to well compensate for the decay of the clamping force of the rubber, maintain the clamping force of the main lip lip, and improve the dust prevention effect.

[0004] The technical problem to be solved by the utility model is realized by the following technical solution: a spring seal cover structure, including a cylindrical cover body and a sealing lip arranged on the cover body;

[0005] The sealing lip includes a main lip and a secondary lip. The main lip is located at the end of the cover body, and the secondary lip is located inside the cover body;

[0006] The main lip extends along the axial direction of the cover body towards the opposite direction of the inner cavity of the cover body, and a spring is arranged on the outer wall of the main lip.

[0007] Preferably, the utility model includes at least one secondary lip. By setting at least one secondary lip, the overall dust prevention effect is improved.

[0008] Preferably, the utility model includes two secondary lips. The two secondary lips and the main lip form three seals, effectively preventing the entry of dust and other impurities.

[0009] Preferably, the two secondary lips extend along the axial direction of the cover body towards opposite directions, and one of the secondary lips has the same extension direction as the main lip. Extending the two secondary lips along the axial direction of the cover body towards opposite directions has a better supporting effect on the cover body, helping to improve the sealing effect of the main lip.

[0010] Preferably, the thickness of the secondary lip far from the main lip is greater than the thickness of the secondary lip close to the main lip, using the thicker secondary lip to support the cover body and ensuring the sealing effect of the thinner secondary lip.

[0011] Preferably, the two secondary lips both extend along the axial direction of the cover body towards the side of the main lip. Extending the two secondary lips along the axial direction of the cover body towards the side of the main lip facilitates the assembly of the cover body, and can reduce the requirement for the strength of the secondary lip, reduce the thickness of the secondary lip, and improve the overall sealing effect.

[0012] Preferably, the utility model further includes a ventilation groove provided on the inner wall of the cover body, and the ventilation groove is arranged along the axial direction of the cover body. The function of the ventilation groove is to communicate with the outside to ensure the balance of the air pressure inside the cover body and further improve the dust-proof ability of the dust-proof cover.

[0013] Preferably, the outer wall of the main lip is concave with respect to the axis of the cover body and is smoothly connected to the outer wall of the cover body through an arc-shaped curved surface. In order to increase the movement range of the main lip to improve its dust-proof effect, the outer wall of the main lip is made concave with respect to the axis of the cover body; and the outer wall of the main lip is smoothly connected to the outer wall of the cover body through an arc-shaped curved surface to reduce the stress at the connection.

[0014] The utility model also discloses a shock absorber which uses the above spring seal cover structure for dust prevention. It includes a shock absorber housing and a shaft body arranged inside the shock absorber housing. The spring seal cover structure is sleeved outside the shaft body, and the cover body is fixed on the inner wall of the shock absorber housing. Using the above spring seal cover structure helps to protect the inside of the shock absorber, prevent dust and other impurities from entering the shock absorber, and cause wear of components such as the shaft body and oil seal.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: The utility model includes a cylindrical cover body and a sealing lip arranged on the cover body. Among them, the sealing lip includes a main lip and a secondary lip. The main lip is located at the end of the cover body, and the secondary lip is located inside the cover body. By setting the main lip and the secondary lip, the sealing effect is improved.

[0016] The main lip extends along the axial direction of the cover body towards the opposite direction of the inner cavity of the cover body. By arranging a spring on the outer wall of the main lip, it can solve the problem of dust-proof failure caused by the attenuation of the force value of the all-rubber lip of the current dust-proof cover, improve the dust-proof effect and service life of the dust-proof cover, and help reduce the wear of the shock absorber. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the spring seal cover structure described in Embodiment 1 of the utility model;

[0018] Figure 2 It is a schematic structural diagram of the shock absorber described in Embodiment 1 of the utility model;

[0019] Figure 3 It is a schematic structural diagram of the spring seal cover structure described in Embodiment 2 of the utility model;

[0020] In the figure, 1 is the cover body, 2 is the sealing lip, 21 is the main lip, and 22 is the secondary lip;

[0021] 3 is the spring, 4 is the ventilation groove, and 5 is the shaft body. Detailed Description of the Embodiments

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] Embodiment 1

[0024] As Figure 1 shown, a spring seal cover structure includes a cylindrical cover body 1 and a sealing lip 2 provided on the cover body 1. The cross-section of the cover body 1 is circular ring-shaped.

[0025] The sealing lip 2 includes a main lip 21 and a secondary lip 22. The main lip 21 is located at the end of the cover body 1, and the secondary lip 22 is located inside the cover body 1.

[0026] The main lip 21 extends along the axial direction of the cover body 1 towards the opposite direction of the inner cavity of the cover body 1. A spring 3 is provided on the outer wall of the main lip 21 to compensate for the loss of force value and improve the dust-proof ability.

[0027] The spring seal cover structure includes at least one secondary lip 22.

[0028] Specifically, the spring seal cover structure includes two secondary lips 22.

[0029] The two secondary lips 22 extend along the axial direction of the cover body 1 towards opposite directions, and one of the secondary lips 22 has the same extension direction as the main lip 21. The main lip 21 mainly realizes the function of sealing and dust-proofing. The first secondary lip 22 plays a role in sealing small-particle dust and supporting the cover body 1. The second secondary lip 22 mainly plays a role in supporting the cover body 1, and cooperates with the first secondary lip 22 to perform sealing mutually, and has a better dust-proof effect on small-particle dust. The thickness of the secondary lip 22 farther from the main lip 21 is greater than the thickness of the secondary lip 22 closer to the main lip 21. The first secondary lip 22 refers to the secondary lip 22 closer to the main lip 21.

[0030] The spring seal cover structure further includes a ventilation groove 4. The ventilation groove 4 is provided on the inner wall of the cover body 1. The ventilation groove 4 is arranged along the axial direction of the cover body 1, and the ventilation groove 4 communicates with the seal cover 2.

[0031] The outer wall of the main lip 21 is concave with respect to the axis of the cover body 1 and is smoothly connected to the outer wall of the cover body 1 through an arc-shaped curved surface.

[0032] As Figure 2 shown, a shock absorber uses the above spring seal cover structure for dust-proofing, and includes a shock absorber housing and a shaft body 5 arranged inside the shock absorber housing. The spring seal cover structure is sleeved outside the shaft body 5, and the outer wall of the cover body 1 is fixed on the inner wall of the shock absorber housing.

[0033] Embodiment 2

[0034] As Figure 3As shown in the figure, the difference from Embodiment 1 is that both of the two secondary lips 22 extend axially along the housing 1 towards the primary lip 21. The main function of the first and second secondary lips 22 is to seal and prevent dust, with the supporting function being secondary, enhancing the dust-proof effect of the dust cover on tiny dust.

Claims

1. A spring seal cover structure, characterized in that: It includes a cylindrical cover body (1) and a sealing lip (2) provided on the cover body (1); The sealing lip (2) includes a main lip (21) and a secondary lip (22). The main lip (21) is located at the end of the cover body (1), and the secondary lip (22) is located inside the cover body (1); The main lip (21) extends axially along the cover body (1) in a direction opposite to the inner cavity of the cover body (1), and a spring (3) is provided on the outer wall of the main lip (21).

2. The spring seal cover structure according to claim 1, wherein: It includes at least one secondary lip (22).

3. The spring seal cover structure according to claim 1, wherein: It includes two secondary lips (22).

4. The spring seal cover structure according to claim 3, wherein: The two secondary lips (22) extend axially along the cover body (1) in opposite directions, and one of the secondary lips (22) has the same extension direction as the main lip (21).

5. The spring seal cover structure according to claim 4, wherein: The thickness of the secondary lip (22) farther from the main lip (21) is greater than the thickness of the secondary lip (22) closer to the main lip (21).

6. The spring seal cover structure according to claim 3, wherein: The two secondary lips (22) both extend axially along the cover body (1) in the direction of the main lip (21).

7. The spring seal cover structure according to claim 1, wherein: It further includes a ventilation groove (4). The ventilation groove (4) is provided on the inner wall of the cover body (1), and the ventilation groove (4) is arranged axially along the cover body (1).

8. The spring seal cover structure according to claim 1, characterized in that: The outer wall of the main lip (21) is concave with respect to the axis of the cover body (1) and is smoothly connected to the outer wall of the cover body (1) through an arc-shaped curved surface.

9. A shock absorber that uses the spring seal cover structure according to any one of claims 1-8 for dust prevention, characterized in that: It includes a shock absorber housing and a shaft body (5) provided inside the shock absorber housing. The spring seal cover structure is sleeved outside the shaft body (5), and the cover body (1) is fixed on the inner wall of the shock absorber housing.

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