Air spring dust cover structure

Abstract

The utility model discloses an air spring dust cover structure, including dust cover main part, is used for the unsealed inner chamber of the cooperation area of air spring's gas chamber, piston rod and cooperation spare is sealed, the edge of dust cover main part is arc structure, and the middle area is equipped with the convex structure of the interference fit with piston rod, and the lower outside is equipped with the convex buckle of the interference fit with cooperation spare, and after installation convex buckle is clamped in the gas chamber inboard. Thus, the middle convex structure of dust cover main part + lower convex buckle double -prevention, distinguish from traditional single embrace, from the middle and edge bidirectional guarantee, improve the reliability of preventing, the edge of arc structure has increased the reverse force of dust cover main part and gas chamber, eliminates the clearance between dust cover main part and gas chamber, combines preventing structure, makes dust cover position more stable, prevents dust from entering comprehensively, has improved dustproof effect.

Description

Technical Field

[0001] This utility model relates to the field of air spring technology, and in particular to an air spring dust cover structure. Background Technology

[0002] In the design and application of air springs, some structures, due to layout requirements, such as Figure 1 As shown, this creates an unsealed inner cavity 01 (such as the area where the air chamber 02 mates with components like the piston rod 03 and locking nut 04). During the air spring's operating cycle, this cavity is vulnerable to the intrusion of external debris and dust. Once these foreign objects enter, they cause wear between the moving parts of the air spring (such as the piston rod 04 and the inner cavity seals), disrupting the sealing environment and affecting the air spring's operational stability, significantly shortening the product's lifespan. Currently, common dust cover sealing structures rely solely on the middle part gripping the piston rod 04 to achieve initial sealing and prevent detachment.

[0003] However, this structure has the following defects: (1) The dust cover 05 is prone to falling off and moving upward under the vibration and reciprocating motion of the air spring, resulting in a gap between the dust cover 05 and the air chamber 02. Dust can easily enter the inner cavity through the gap, and the dustproof effect is extremely poor; (2) The single clamping structure cannot effectively meet the anti-detachment requirements under complex working conditions. Once the clamping force is insufficient or the structure is fatigued, the risk of the dust cover falling off increases sharply, which seriously affects the reliability and life of the air spring.

[0004] Therefore, there is an urgent need for a new type of air spring dust cover structure to solve the problems of preventing it from falling off and preventing dust. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes an air spring dust cover structure.

[0006] This utility model proposes an air spring dust cover structure, including a dust cover body, used to seal the unclosed inner cavity formed by the air chamber, piston rod and mating area of ​​the air spring. The edge of the dust cover body is set as an arc structure, the middle area is provided with a protrusion structure that is interference fit with the piston rod, and the lower outer side is provided with a protrusion buckle that is interference fit with the mating parts. After installation, the protrusion buckle is locked inside the air chamber.

[0007] Preferably, the lower end face of the dust cover body is provided with several grooves to provide space for installation and deformation.

[0008] Preferably, the dust cover body adopts a spliced ​​structure of lower plastic and upper rubber, or an overall single material structure.

[0009] Preferably, the single-material structure is a single rubber structure, a single plastic structure, or a single metal structure. When the dust cover body is a single metal structure, its surface is provided with a rubber sealing layer.

[0010] Preferably, the protrusion structure is configured as an annular protrusion.

[0011] Preferably, the grooves are rectangular, trapezoidal, or arc-shaped, numbered 2-6, and have a depth of 1-3 mm.

[0012] In summary, this utility model has the following beneficial effects: the central protrusion structure of the dust cover body plus the lower protrusion buckle provide double anti-slip protection, which is different from the traditional single clamping. It provides bidirectional protection from the middle and the edge, improving the reliability of anti-slip protection; the edge of the arc structure increases the opposing force between the dust cover body and the air chamber, eliminating the gap between the dust cover body and the air chamber. Combined with the anti-slip structure, it makes the position of the dust cover more stable, completely blocking dust from entering and improving the dustproof effect.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] Figure 1 A cross-sectional view of an existing air spring dust cover structure;

[0015] Figure 2 This is a cross-sectional view of the air spring dust cover structure according to an embodiment of the present utility model;

[0016] Figure 3 This is a cross-sectional view of the main structure of the dust cover with the spliced ​​structure according to an embodiment of the present utility model;

[0017] Figure 4 This is a three-dimensional partial cross-sectional view of the internal structure of the dust cover body with splicing structure according to an embodiment of the present utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the lower plastic part of the dust cover body of the splicing structure according to an embodiment of the present utility model;

[0019] Figure 6 This is a front view of the dust cover body integrally formed according to an embodiment of the present utility model;

[0020] Figure 7 A bottom view showing two grooves at the bottom of the dust cover body in Embodiment 1 of this utility model;

[0021] Figure 8 A bottom view of the dust cover body of Embodiment 2 of this utility model showing four grooves at the bottom;

[0022] Figure 9 A bottom view showing the bottom of the dust cover body of Embodiment 3 of this utility model with six grooves.

[0023] Figure 2-9 middle:

[0024] 1. Dust cover body; 11. Arc-shaped structure; 12. Lower plastic; 13. Upper rubber; 14. Raised structure; 15. Raised buckle; 16. Groove; 2. Air chamber; 3. Piston rod; 4. Matching parts; 5. Inner cavity. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] like Figure 2-9 As shown, the air spring dust cover structure proposed in this embodiment includes a dust cover body 1, which is used to seal the unclosed inner cavity 5 formed by the mating area of ​​the air spring air chamber 2, piston rod 3 and mating parts 4. The edge of the dust cover body 1 is set as an arc structure 11, the middle area is provided with a protrusion structure 14 that is interference fit with the piston rod 3, and the lower outer side is provided with a protrusion buckle 15 that is interference fit with the mating parts 4. After installation, the protrusion buckle 15 is locked inside the air chamber 2.

[0027] The interference fit design can significantly increase the clamping force of the dust cover body 1 on the piston rod 3. Under the conditions of reciprocating motion and vibration of the air spring, the raised structure 14 in the middle area can effectively limit the axial displacement of the dust cover body 1 along the piston rod 3, prevent the dust cover from falling off, and provide the first reliable guarantee for preventing it from falling off.

[0028] Specifically, the protrusion structure 14 is designed as an annular protrusion, with its inner diameter precisely matching the outer diameter of the piston rod 3. The interference fit can be precisely adjusted according to the material of the piston rod 3 and the operating conditions of the air spring. For example, for air springs operating under high-frequency vibration conditions, the interference fit can be appropriately increased to improve clamping reliability; for low-load conditions, the interference fit can be optimized to reduce installation difficulty.

[0029] Thus, the central protruding structure 14 and the lower protruding buckle 15 of the dust cover body 1 provide double anti-slip protection, unlike the traditional single clamping method. They provide dual protection from the middle and the edges, improving the reliability of anti-slip protection. The edge of the arc-shaped structure 11 increases the opposing force between the dust cover body 1 and the air chamber 2, eliminating the gap between the dust cover body 1 and the air chamber 2. Combined with the anti-slip structure, this makes the position of the dust cover more stable, completely blocking dust from entering, reducing wear on parts, improving the dustproof effect, and extending the product's service life.

[0030] It should be noted that the edge of the arc-shaped structure 11 of the dust cover body 1 replaces the traditional horizontal edge structure. During the installation of the dust cover body 1, when the edge of the arc-shaped structure 11 contacts the mating surface of the air chamber 2, a reverse force is generated due to the deformation of the arc-shaped structure 11. This reverse force allows the edge of the arc-shaped structure 11 of the dust cover body 1 to fit tightly with the mating surface of the air chamber 2, eliminating the gap problem that easily occurs in the traditional structure, thereby effectively preventing dust from entering the inner cavity 5 from the edge gap between the dust cover and the air chamber 2.

[0031] Furthermore, the curvature radius, arc length, and other parameters of the edge of the arc-shaped structure 11 can be customized according to the structural dimensions and installation space of the air chamber 2. For example, for the air spring air chamber 2 with a compact installation space, an arc-shaped edge with a small curvature radius can be designed to meet the installation requirements while ensuring the generation of the reverse force; for large-sized air chamber 2, the arc parameters can be adjusted to adapt to the structure of the air chamber 2 to ensure the sealing effect.

[0032] In addition, the protruding buckle 15 on the lower outer side of the dust cover body 1 is interference-fitted with the mating part 4 of the air spring (such as a locking nut), and after installation, the protruding buckle 15 will snap into the inner groove or mating structure of the air chamber 2. The number, shape and size of the protruding buckle 15 can be flexibly adjusted. It can be designed as a continuous ring buckle, or adjusted as multiple discrete claw structures distributed circumferentially as required.

[0033] In this embodiment, the lower end face of the dust cover body 1 is provided with several grooves 16 to provide space for installation deformation. When the dust cover body 1 is made of a soft material (such as rubber), the grooves 16 can provide deformation space, facilitating elastic deformation of the dust cover body 1 during installation and reducing installation difficulty. For example, during installation, the lower part of the soft material dust cover body 1 is squeezed by the air chamber 2 installation structure. The grooves 16 can cause the material to deform towards the groove area, avoiding damage to the dust cover body 1 or improper installation due to excessive compression.

[0034] It should be noted that the number, shape, and depth of the grooves 16 can be flexibly adjusted. The number of grooves 16 can be set to 2-6, specifically, as shown below. Figure 7 , Figure 8 and Figure 9 As shown, there are 2, 4 or 6 grooves 16, which are evenly distributed on the lower outer edge of the dust cover body 1; the shape of the groove 16 can be rectangular, trapezoidal or arc (selected according to the deformation characteristics of the soft material and installation requirements); the depth of the groove 16 can be set to 1-3mm. The depth design needs to balance the deformation space and the structural strength of the dust cover to avoid insufficient structural strength of the lower part of the dust cover due to excessive depth.

[0035] Preferably, the dust cover body 1 adopts a spliced ​​structure of lower plastic 12 and upper rubber 13, or an overall single material structure. Specifically, the single material structure can be a single rubber structure (with good elasticity and sealing performance, which can adapt to the sealing requirements of the curved structure 11 edge and the clamping requirements of the middle raised structure 14), a single plastic structure (with relatively high strength and rigidity, but slightly inferior elasticity and sealing performance compared to rubber, requiring optimization of the design parameters of the curved structure 11 edge and the middle raised structure 14 to ensure sealing and clamping effects), or a single metal structure. When the dust cover body 1 adopts a single metal structure (suitable for air spring scenarios with extremely high strength requirements and harsh working conditions), its surface is provided with a rubber sealing layer.

[0036] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dust cover structure for an air spring, comprising a dust cover body (1) for sealing an unclosed inner cavity (5) formed by the mating area of ​​the air chamber (2), piston rod (3), and mating parts (4) of the air spring, characterized in that, The edge of the dust cover body (1) is set as an arc structure (11), the middle area is provided with a protruding structure (14) that is interference fit with the piston rod (3), and the lower outer side is provided with a protruding buckle (15) that is interference fit with the mating part (4), and after installation, the protruding buckle (15) is locked inside the air chamber (2).

2. The air spring dust cover structure according to claim 1, characterized in that, The lower end face of the dust cover body (1) is provided with several grooves (16) to provide space for installation and deformation.

3. The air spring dust cover structure according to claim 1, characterized in that, The dust cover body (1) adopts a splicing structure of lower plastic (12) and upper rubber (13), or an overall single material structure.

4. The air spring dust cover structure according to claim 3, characterized in that, The single material structure is set as a single rubber structure, a single plastic structure or a single metal material structure. When the dust cover body (1) adopts a single metal material structure, its surface is provided with a rubber sealing layer.

5. The air spring dust cover structure according to claim 1, characterized in that, The protrusion structure (14) is configured as an annular protrusion.

6. The air spring dust cover structure according to claim 2, characterized in that, The groove (16) is rectangular, trapezoidal or arc-shaped, with 2-6 grooves and a depth of 1-3mm.

Images