An air spring bonding process sleeve

Abstract

The utility model discloses an air spring bonding technology protecting tube, including air spring bladder and the aluminium protecting tube of setting in air spring bladder outer surface, air spring bladder is through vulcanization technology and is formed integrally vulcanization, and presents as straight conical structure, air spring bladder and aluminium protecting tube between coating have bonding agent, through the aluminium protecting tube fixed region is coated with adhesive, namely aluminium protecting tube mark area needs to be coated with two layers of bottom glue and surface glue guarantee bonding, and in the vulcanization process of air spring bladder, increase protecting tube, positioning synchronous vulcanization on the mould, directly realize the connection between air spring bladder and aluminium protecting tube, replace traditional air spring bladder and protecting tube buckling process, need not in protecting tube processing antiskid tooth shape feature, also need not support ring, not only reduce the assembly process, reduce assembly cost, further reduce the process quality risk, improve product quality.

Description

Technical Field

[0001] This utility model belongs to the field of air spring technology, specifically, it relates to an air spring adhesive process sleeve. Background Technology

[0002] An air spring is an industrial component that uses compressed air as an elastic medium. Its core is a flexible bladder made of high-strength rubber fabric layers, which bears loads by being filled with compressed air. When subjected to external force, the bladder compresses, increasing the internal air pressure to absorb impact and vibration; when the external force disappears, the air pressure causes the bladder to return to its original shape. By adjusting the inflation volume, its stiffness and support height can be easily changed. Compared with traditional steel springs, air springs have outstanding advantages such as better vibration isolation, adjustable stiffness, low noise, and stable natural frequency. They are widely used in precision vibration isolation systems for high-end cars, commercial vehicles, high-speed rail bogies, and industrial equipment to effectively improve ride comfort, operational stability, and equipment protection.

[0003] To reliably secure the air spring to a lightweight, robust rigid component and achieve stable load-bearing or precise guidance, an aluminum sleeve is typically fitted over the air spring body. This not only prevents the air spring from deforming and popping out during expansion and contraction, and avoids damage to the air spring from collisions, scratches, or other external objects, but also reduces the stiffness of the air spring and improves its vibration damping reliability through the combination of the air spring and the aluminum sleeve, thereby enhancing the vehicle's comfort and other performance characteristics.

[0004] Regarding the connection between the air spring and the protective sleeve, such as Figure 4 As shown, current technology typically uses a crimping process between the air spring bladder and the aluminum casing. This involves using a metal inner support ring to crimp the casing into a C-shape, securing the support ring, and fixing the air spring bladder in the center. To prevent slippage, the casing needs to be designed with serrated features at the crimping positions to prevent detachment after crimping and to increase friction. However, this crimping process not only requires machining anti-slip serrated features into the casing but also requires a support ring. This results in numerous assembly steps, high costs, and the possibility of product damage and reduced quality due to improper operation during assembly, thus exhibiting certain limitations. Utility Model Content

[0005] To address the technical problem that the existing technology typically uses a crimping process to connect the air spring bladder and the aluminum casing, which involves numerous assembly steps and may cause product damage and reduced product quality due to improper operation, this utility model provides an air spring adhesive bonding process casing.

[0006] The objective of this utility model can be achieved through the following technical solutions: An air spring adhesive sleeve includes an air spring bladder and an aluminum sleeve fitted on the outer surface of the air spring bladder; the air spring bladder is integrally vulcanized by a vulcanization process and has a straight conical structure; an adhesive is coated between the air spring bladder and the aluminum sleeve.

[0007] Furthermore, the air spring bladder is composed of three parts: a first inner straight cylinder, a constricted section, and a second inner straight cylinder; the transitions between the first inner straight cylinder and the constricted section, as well as between the second inner straight cylinder, are smooth.

[0008] Furthermore, the aluminum casing is composed of three parts: a bent section, an outer straight section, and a convex edge section; the transitions between the bent section and the outer straight section, as well as between the outer straight section and the convex edge section, are smooth.

[0009] Furthermore, the adhesive is located on the upper part of the area where the air spring bladder and the aluminum sleeve are attached.

[0010] Furthermore, the upper part of the aluminum casing is bent outwards.

[0011] Furthermore, the convex edge at the lower part of the aluminum casing is radially outward and has an annular shape.

[0012] Furthermore, the constricted portion of the air spring bladder is radially inwardly narrowed and has a conical structure.

[0013] The beneficial effects of this utility model are: This invention achieves direct connection between the air spring bladder and the aluminum casing by applying adhesive to the fixing area of ​​the aluminum casing (the marked area of ​​the aluminum casing needs to be coated with two layers of primer and topcoat to ensure adhesion), and by adding the casing during the vulcanization process of the air spring bladder, and positioning and simultaneously vulcanizing on the mold. This replaces the traditional air spring bladder and casing crimping process, eliminates the need for processing anti-slip tooth features on the casing, and eliminates the need for support rings. This not only reduces assembly steps and assembly costs, but also further reduces process quality risks and improves product quality.

[0014] This invention, by setting the upper part of the aluminum casing as an outwardly bent section, not only increases the contact area between the upper part of the aluminum casing and other components, improving the firmness and stability of the connection, but also guides the deformation direction of the air spring bladder during the compression and extension of the air spring, making the movement of the bladder more stable and smooth, further improving the performance of the aluminum casing and enhancing its usability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bonding structure between the air spring bladder and the aluminum sleeve in this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a cross-sectional schematic diagram of the overall structure of this utility model; Figure 4 This is a schematic diagram of the air spring bladder and aluminum sleeve crimping structure in the prior art; The attached diagram lists the components represented by each number as follows: 1. Aluminum casing; 11. Bending section; 12. Protruding edge; 13. Outer straight cylinder section; 2. Air spring bladder; 21. Narrowing section; 22. First inner straight cylinder section; 23. Second inner straight cylinder section; 3. Adhesive. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 - Figure 3 As shown, an air spring adhesive sleeve includes an air spring bladder 2, which has a straight conical structure and is integrally vulcanized through a vulcanization process. The air spring bladder 2 is composed of three parts: a first inner straight cylinder 22, a constricted section 21, and a second inner straight cylinder 23, which are arranged sequentially from bottom to top. There are smooth transitions between the first inner straight cylinder 22 and the constricted section 21, as well as between the second inner straight cylinder 23. The constricted section 21, which is radially constricted inward, is provided in the middle of the air spring bladder 2 and has a conical structure. This constricted section 21 guides the air spring bladder 2 to produce the expected buckling deformation mode when under pressure, thereby achieving more stable stiffness characteristics and a larger axial displacement stroke.

[0018] An aluminum sleeve 1 is fitted onto the upper part of the outer surface of the air spring bladder 2. The aluminum sleeve 1 is used to protect and limit the air spring bladder 2, preventing damage from external objects or restricting the radial expansion deformation of the air spring bladder 2. The aluminum sleeve 1 consists of three parts: a bent part 11, an outer straight part 13, and a convex edge part 12, which are arranged from top to bottom. The bent part 11 and the outer straight part 13, as well as the outer straight part 13 and the convex edge part 12, are smoothly transitioned.

[0019] The upper part of the aluminum sleeve 1 is provided with an outwardly bent portion 11. This bent portion 11 can not only increase the contact area between the upper part of the aluminum sleeve 1 and other components, improving the firmness and stability of the connection, but also guide the deformation direction of the bladder during the compression and extension of the air spring, making the movement of the bladder more stable and smooth. The lower part of the aluminum sleeve 1 is provided with a radially outward and annular convex edge 12, which can not only increase the rigidity and stability of the bottom of the aluminum sleeve 1 and prevent the bottom from deforming or being damaged during use, but also prevent foreign objects from directly impacting and rubbing against the lower part of the bladder, thus extending the service life of the bladder.

[0020] An adhesive 3 is applied between the air spring bladder 2 and the aluminum sleeve 1. The adhesive 3 is located on the upper part of the contact area between the air spring bladder 2 and the aluminum sleeve 1, and is used to achieve a firm connection between the two by bonding, replacing the traditional crimping process. The adhesive 3 forms a continuous and uniform adhesive layer on the upper part of the contact area, ensuring that the connection between the bladder and the sleeve can effectively withstand dynamic loads, vibrations and deformations during the operation of the air spring, while providing reliable sealing and mechanical strength.

[0021] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below: This invention achieves direct connection between the air spring bladder 2 and the aluminum sleeve 1 by applying adhesive to the fixed area of ​​the aluminum sleeve 1 (the marked area of ​​the aluminum sleeve 1 needs to be coated with two layers of primer and topcoat to ensure adhesion), and by adding the sleeve during the vulcanization process of the air spring bladder 2, and positioning and simultaneously vulcanizing on the mold. This replaces the traditional pressing process between the air spring bladder 2 and the sleeve, eliminates the need for processing anti-slip tooth features on the sleeve, and eliminates the need for a support ring. This not only reduces assembly steps and assembly costs, but also further reduces process quality risks and improves product quality.

[0022] This utility model, by setting the upper part of the aluminum sleeve 1 as an outwardly bent portion 11, can not only increase the contact area between the upper part of the aluminum sleeve 1 and other components, improving the firmness and stability of the connection, but also guide the deformation direction of the air spring bladder 2 during the compression and extension of the air spring, making the movement of the bladder more stable and smooth, further improving the performance of the aluminum sleeve 1 and enhancing its use effect.

[0023] This utility model, by providing a radially outward and annular protruding edge 12 at the lower part of the aluminum casing 1, not only increases the rigidity and stability of the bottom of the aluminum casing 1, preventing deformation or damage to the bottom during use, but also prevents direct impact and friction from external objects on the lower part of the bladder, eliminating safety hazards and effectively avoiding damage to the air spring. It not only effectively avoids the risk of air spring failure due to bladder damage, but also reduces the frequency of bladder maintenance and replacement, significantly extending the actual service life of the bladder, thereby improving the operational safety, stability, and economic practicality of the entire air spring equipment.

[0024] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An air spring bonding process sleeve, comprising an air spring bladder (2) and an aluminum sleeve (1) fitted onto the outer surface of the air spring bladder (2); characterized in that: The air spring bladder (2) is integrally vulcanized by a vulcanization process and has a straight conical structure; an adhesive (3) is coated between the air spring bladder (2) and the aluminum casing (1).

2. The air spring bonding process sleeve according to claim 1, characterized in that: The air spring bladder (2) is composed of three parts: a first inner straight cylinder (22), a constricted part (21), and a second inner straight cylinder (23); the first inner straight cylinder (22) and the constricted part (21) and the second inner straight cylinder (23) are smoothly transitioned.

3. The air spring bonding process sleeve according to claim 1, characterized in that: The aluminum casing (1) consists of three parts: a bent part (11), an outer straight part (13), and a convex edge part (12); the bent part (11) and the outer straight part (13) and the outer straight part (13) and the convex edge part (12) are smoothly transitioned.

4. The air spring bonding process sleeve according to claim 1, characterized in that: The adhesive (3) is located on the upper part of the area where the air spring bladder (2) and the aluminum casing (1) are attached.

5. The air spring bonding process sleeve according to claim 3, characterized in that: The upper part of the aluminum casing (1) is bent (11) with an outward bend.

6. The air spring bonding process sleeve according to claim 3, characterized in that: The convex edge (12) at the bottom of the aluminum casing (1) is radially outward and is in the form of a ring.

7. The air spring bonding process sleeve according to claim 2, characterized in that: The constricted portion (21) of the air spring bladder (2) is radially constricted inward and has a conical structure.

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