Shock absorber dust cover and shock absorber

Abstract

The utility model relates to a dustproof cover of a shock absorber, which is cylindrical and comprises a cover part at the upper part and a rib part positioned below the cover part, the rib part comprises a plurality of fins which are uniformly arranged in the circumferential direction, each fin axially extends downwards from the cover part, and the adjacent fins are spaced by long holes; the inner wall of the dustproof cover of the shock absorber is provided with inner convex ribs, the inner convex ribs protrude inwards in the radial direction from the top of the cover part above each rib to the rib part, each inner convex rib extends in the axial direction where the rib is located, and the wall thickness of the inner convex ribs is reduced from the top to the rib part.

Description

Technical Field

[0001] The utility model relates to a shock absorber component, in particular to a shock absorber dust cover and a shock absorber comprising the dust cover. Background Art

[0002] Shock absorbers play a crucial role in automotive suspension, working in conjunction with springs to improve a vehicle's ride smoothness. They dampen the rebound oscillations caused by springs after absorbing shock and absorb the energy of road impacts. They play a crucial role in driving safety, protecting the vehicle, and enhancing driving and riding comfort.

[0003] The dust cover is fixed to the shock absorber's outer tube, protecting it from dust and other impurities. When the vehicle is in motion, the shock absorber is subjected to not only vertical compressive restoring forces but also radial forces. This radial force causes the lower end of the dust cover to move eccentrically, causing friction with the shock absorber's outer tube, damaging the paint finish and making it susceptible to rust.

[0004] The novel invention provides a dust cover with an optimized design, which can solve the friction problem between the dust cover and the shock absorber, and also avoid the dust cover being too heavy.

[0005] It should be noted that the information disclosed in the background technology section of this utility model is only intended to deepen the understanding of the general background technology of the utility model, and should not be regarded as an admission or in any form of implication that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0006] In order to overcome the above-mentioned defects, the utility model provides an optimized shock absorber dust cover and shock absorber, which can solve the friction problem between the dust cover and the shock absorber outer tube, while also avoiding the dust cover being too heavy.

[0007] According to one aspect of the utility model, a shock absorber dust cover is provided, which is cylindrical and comprises: an upper cover portion and a rib portion located below the cover portion; the rib portion comprises a plurality of ribs evenly arranged along the circumferential direction, each rib extending axially downward from the top of the cover portion, and adjacent ribs are separated by long holes; the inner wall of the shock absorber dust cover has an inner convex rib, which protrudes radially toward the interior of the shock absorber dust cover from the cover portion above each rib to the rib portion, each inner convex rib extends along the axial direction of the rib, and the wall thickness of the inner convex rib decreases from the top to the rib portion.

[0008] Preferably, the inner rib includes at least three sections from the top to the rib: a first section, a second section, and a third section, the wall thickness of the first section is smaller than the wall thickness of the second section; the wall thickness of the third section is smaller than the wall thickness of the second section.

[0009] Preferably, the height of the cover portion is substantially the same as the height of the rib portion.

[0010] Preferably, the heights of the first, second and third sections of the inner rib are h1, h2 and h3 respectively, the height H1 of the cover is greater than the height h1 of the first section, and the sum of the heights h2+h3 of the second and third sections is greater than the height H2 of the rib.

[0011] Preferably, the height of the cover is 20-30 mm, the height of the rib is 20-30 mm; and / or the wall thickness of the first section, the second section and the third section is in the range of 2-5 mm.

[0012] Preferably, the outer wall of the lower end portion of the rib is provided with an outwardly protruding rib.

[0013] Preferably, the top inner wall of the cover portion is further provided with radially extending reinforcing ribs arranged at intervals along the circumferential direction.

[0014] Preferably, a protrusion is provided on one end of the reinforcing rib close to the center of the circle.

[0015] Preferably, the top of the cover further includes a central hole for connecting with the outer cylinder of the shock absorber.

[0016] According to another aspect of the utility model, a shock absorber is provided, which includes: a shock absorber outer tube, which includes the aforementioned shock absorber dust cover and dust cover, wherein the shock absorber dust cover passes through the connecting rod sleeve of the shock absorber and is arranged outside the shock absorber outer tube; the dust cover is further sleeved outside the shock absorber dust cover.

[0017] Preferably, the first section of the shock absorber dust cover forms an interference fit with the shock absorber outer tube; the second section forms a clearance fit with the shock absorber outer tube; and the third section forms an interference fit with the thick diameter portion of the shock absorber outer tube.

[0018] The novel shock absorber dust cover and shock absorber have the following advantages:

[0019] The shock absorber dust cover features a cover and ribs. The elongated holes between the ribs not only reduce weight but also facilitate oil and gas discharge. The dust cover's inner wall features a stepped rib design, ensuring a secure connection to the shock absorber housing while also facilitating oil and gas discharge and facilitating assembly, resulting in optimal weight reduction. The ribs at the lower end of the ribs create an effective gap between the dust cover and the shock absorber housing, effectively preventing interference and wear, and reducing the risk of paint peeling and rust on the shock absorber housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional schematic diagram of a shock absorber dust cover of the present invention is shown;

[0021] Figure 2 Shown Figure 1 A front view of the shock absorber dust cover;

[0022] Figure 3 A three-dimensional schematic diagram showing the interior of the shock absorber dust cover of the novel embodiment is shown from the bottom;

[0023] Figure 4 A cross-sectional view of the plane where the inner rib of the shock absorber dust cover of the present invention is located is shown;

[0024] Figure 5 Shows a bottom view of the shock absorber dust cover of the present invention;

[0025] Figure 6 Shows a cross-sectional perspective view of the novel shock absorber dust cover;

[0026] Figure 7 A schematic diagram of a shock absorber including the novel dust cover is shown;

[0027] Figure 8 A schematic cross-sectional view of the connection structure between the dust cover and the shock absorber outer cylinder is shown. DETAILED DESCRIPTION

[0028] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0029] The terms "above", "below", "upward" and "downward" in the present invention represent upper and lower positional relationships, but are not limited to vertical above and vertical below. Those skilled in the art can understand that obliquely above and obliquely below both fall within the scope of "above" and "below" in the present invention, and obliquely upward and obliquely downward both fall within the scope of "upward" and "downward" in the present invention.

[0030] The technical problems solved by the present utility model can be achieved by the following preferred embodiments.

[0031] To solve the above technical problems, the present novelty proposes a shock absorber dust cover 1, as Figure 1 、 2 shown, which includes: The cylindrical dust cover 1 includes an upper cover part 10 and a rib part 20 located below the cover part 10. The rib part 20 includes multiple rib fins 21 arranged uniformly in the circumferential direction. Each rib fin axially extends downward from the top 101 of the cover part 10. Adjacent rib fins 21 are spaced by long holes 22, and the long holes 22 are used to discharge oil and gas and play a role in reducing the weight of the dust cover. The top of the cover part 10 also includes a central hole 30 for connecting with the shock absorber outer cylinder.

[0032] As Figure 3 、 4 shown, the inner wall of the shock absorber dust cover has inner convex ribs 110. The inner convex ribs 110 radially protrude inward from the top 101 of the cover part 10 above each rib fin 21 to the rib part 20. Each inner convex rib 110 extends along the axial direction where the rib fin is located, and its wall thickness decreases from the top of the dust cover to the rib part. Optionally, the inner convex rib 110 includes at least three sections from the top to the rib part: the first section 111, the second section 112, and the third section 113. The wall thickness of the first section 111 is T1, and the first section 111 forms an interference fit with the shock absorber outer cylinder; the wall thickness of the second section 112 is T2, T2 < T1. A gap between the dust cover and the shock absorber outer cylinder is formed at this section, which can be used as a channel for discharging oil and gas and reduces the overall weight; the wall thickness of the third section 113 is T3, T3 < T2, which facilitates the dust cover 1 to be sleeved on the shock absorber and further plays a role in reducing the weight of the dust cover.

[0033] Furthermore, as Figure 2 、 4 shown, the height of the cover part 10 of the shock absorber dust cover is H1, and the height of the rib part 20 is H2. Optionally, H1 and H2 are substantially the same. The heights of the first section 111, the second section 112, and the third section 113 of the inner convex rib 110 are h1, h2, and h3 respectively. The height H1 of the cover part 10 is greater than the height h1 of the first section 111, and the sum of the heights of the second section 112 and the third section 113, h2 + h3, is greater than the height H2 of the rib part 20.

[0034] The height of the cover part 10 can be selected as 20 - 30 mm, and the height of the rib part 20 is 20 - 30 mm. The wall thicknesses of the first section 111, the second section 112, and the third section 113 can be selected within the range of 2 - 5 mm, and more preferably within the range of 2 - 4 mm.

[0035] Preferably, as Figure 1 、 2As shown in FIG. 4 , the outer wall of the lower end portion of the rib 21 may be provided with an outwardly protruding rib 211 .

[0036] Preferably, if Figure 5 As shown, the inner wall of the top 101 of the cover portion 10 of the shock absorber dust cover is also arranged at intervals along the circumferential direction with radially extending reinforcing ribs 102 to increase the holding force of the shock absorber dust cover, and see Figure 6 Each reinforcing rib 102 is provided with a protrusion 103 at one end close to the center of the circle, which contacts the oil seal steel plate and optimizes the force on the top of the shock absorber dust cover.

[0037] The novel shock absorber dust cover can be formed by an injection molding process. The material of the dust cover can be a resin material, such as nylon 66 / 6, PP, POM, or a metal, such as aluminum, iron, etc.

[0038] The present invention also provides a shock absorber, which includes the above-mentioned shock absorber dust cover 1. Figure 7 、 8 A longitudinal cross-sectional view of a shock absorber including a dust cover and illustrating the connection between the dust cover and the shock absorber outer tube is shown. The shock absorber comprises an outer tube 3, a shock absorber dust cover 1, and a dust cover 2. A connecting rod 31 of the shock absorber passes through a central hole 30 of the dust cover 1, allowing the shock absorber dust cover 1 to fit over the outer tube 3. The dust cover 2 fits over the dust cover 1.

[0039] See also Figure 8 and Figure 4 The first section 111 of the shock absorber dust cover has the largest wall thickness T1, forming an interference fit between this section and the shock absorber outer tube 3. The wall thickness T2 of the second section 112 is smaller than T1, which not only reduces weight but also forms a clearance fit between this section and the shock absorber outer tube 3. The gap between the second section 112 and the shock absorber outer tube 3 serves as an oil and gas discharge channel, facilitating oil and gas discharge. The wall thickness of the third section 113 is even smaller, further reducing the weight of the dust cover. The smaller wall thickness also means a larger inner diameter, making it easier to assemble the dust cover 1 when inserted into the shock absorber outer tube 3. In addition, the shock absorber outer tube portion to which the third section 113 is connected preferably has a larger diameter portion. Therefore, although the third section 113 has a reduced wall thickness, it still forms an interference fit with the larger diameter portion of the shock absorber outer tube. This new dust cover, when well-fitted and fixed to the shock absorber outer tube, is easy to assemble and achieves optimal weight reduction.

[0040] like Figure 8 As shown, the protrusion of the outer rib 211 of the dust cover creates a certain gap between the shock absorber outer tube 3 and the dust cover 2, thereby effectively preventing the swing of the lower end of the dust cover 2 when the shock absorber works up and down, causing scratches between it and the shock absorber outer tube 3, and reducing the risk of paint loss and rust on the shock absorber outer tube due to scratches.

[0041] The foregoing disclosure of the embodiments of the present disclosure has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed. In light of the foregoing disclosure, many variations and modifications of the embodiments described herein will be apparent to those of ordinary skill in the art. Please note that the foregoing examples are not intended to be limiting. Additional embodiments of devices and apparatuses that may include many of the features described above are also contemplated. Other devices, apparatuses, features, and advantages of the present disclosure will become more apparent to those of skill in the art upon examination of the drawings and detailed description. It is intended that all such other devices, apparatuses, features, and advantages be included within the scope of protection of the present invention.

Claims

1. A shock absorber dust cover, characterized in that: It is cylindrical and includes: An upper cover part (10) and a rib part (20) located below the cover part (10); The rib part (20) includes a plurality of rib fins (21) arranged uniformly in the circumferential direction. Each rib fin (21) extends axially downward from the cover part (10), and adjacent rib fins (21) are spaced by long holes (22); The inner wall of the shock absorber dust cover has inner convex ribs (110). The inner convex ribs (110) protrude radially into the interior of the shock absorber dust cover from the top (101) of the cover part (10) above each rib fin (21) to the rib part (20). Each inner convex rib (110) extends along the axial direction where the rib fin is located, and the wall thickness of the inner convex rib (110) decreases from the top to the rib part.

2. The shock absorber dust cover according to claim 1, characterized in that: The inner convex rib (110) includes at least three segments from the top to the rib part: a first segment (111), a second segment (112), and a third segment (113), The wall thickness of the first segment (111) is T1; the wall thickness of the second segment (112) is T2, and T2 < T1; the wall thickness of the third segment (113) is T3, and T3 < T2.

3. The shock absorber dust cover according to claim 2, characterized in that: The height of the cover part (10) is H1, and the height of the rib part (20) is H2. H1 and H2 are substantially the same.

4. The shock absorber dust cover according to claim 3, characterized in that: The heights of the first segment (111), the second segment (112), and the third segment (113) of the inner convex rib (110) are h1, h2, and h3 respectively. The height H1 of the cover part (1) is greater than the height h1 of the first segment (111), and the sum of the heights of the second segment (112) and the third segment (113), h2 + h3, is greater than the height H2 of the rib part (20).

5. The shock absorber dust cover according to claim 4, characterized in that: The height of the cover part (10) is 20 - 30 mm, and the height of the rib part (20) is 20 - 30 mm; and / or The wall thicknesses of the first segment (111), the second segment (112), and the third segment (113) are in the range of 2 - 5 mm.

6. The shock absorber dust cover according to any one of claims 1 to 5, characterized in that: An outwardly protruding outer convex rib (211) is provided on the outer wall of the lower end part of the rib fin (21).

7. The shock absorber dust cover according to any one of claims 1 to 5, characterized in that: Radially extending reinforcing ribs (102) are also arranged at intervals along the circumferential direction on the inner wall of the top of the cover part (10).

8. The shock absorber dust cover according to claim 7, characterized in that: A protrusion (103) is provided at one end of the reinforcing rib (102) close to the center of the circle.

9. The shock absorber dust cover according to any one of claims 1 to 5, characterized in that: The top of the cover part (10) further includes a central hole (30) for connecting with the shock absorber outer cylinder.

10. A shock absorber, comprising: A shock absorber outer cylinder (3), the shock absorber dust cover (1) according to any one of claims 1 - 9, and a dust cover (2), wherein the shock absorber dust cover (1) is sleeved outside the shock absorber outer cylinder (3) through the connecting rod (31) of the shock absorber; the dust cover (2) is further sleeved outside the shock absorber dust cover (1).

11. The shock absorber according to claim 10, characterized in that An interference fit is formed between the first segment (111) of the shock absorber dust cover and the shock absorber outer cylinder (3); a clearance fit is formed between the second segment (112) and the shock absorber outer cylinder (3); an interference fit is formed between the third segment (113) and the thick - diameter part of the shock absorber outer cylinder (3).

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