Air spring bag skin with vulcanized support ring composite cord thread structure

Abstract

The invention discloses an air spring bag skin with a vulcanized support ring composite cord thread structure, which comprises a bag skin, the bag skin is divided into a bag skin large head, a bag skin working area and a bag skin small head, the bag skin large head part is of a three-layer cord thread structure, the bag skin working area and the bag skin small head part are of a single-layer cord thread structure, and the bag skin small head part is of a double-layer cord thread structure. The overall thickness of the capsule skin working area and the capsule skin small end portion is smaller than that of the capsule skin large end portion, the inner diameter of the capsule skin working area is gradually reduced from the capsule skin large end to the capsule skin small end portion, and a supporting ring is fixed to the inner wall of the capsule skin large end in a vulcanization bonding mode. Different reinforcing layer structural designs are adopted for the air spring bag skin, the expansion outer diameter and bursting pressure of a product can be guaranteed, the thickness of the product in a working area can be effectively reduced, the flexibility of the product is improved, the hysteresis force of the air spring is reduced, and the comfort of the product is improved.

Description

Technical Field

[0001] The invention relates to an empty spring bag skin with a vulcanized support ring composite cord structure, belonging to the technical field of air springs. Background Art

[0002] Compared to traditional coil springs, air springs have nonlinear stiffness characteristics. They can adapt their initial stiffness to varying loads, ensuring consistent ride comfort. During wheel bounce and air spring compression, the air spring increases stiffness, dampening impacts transmitted from the road surface to the vehicle body through the wheel and preventing the bump stop from puncturing, further enhancing ride comfort and handling stability.

[0003] An air spring primarily consists of a bladder, an upper chamber, and a piston, forming an enclosed space. As the core component of an air spring, the bladder directly impacts ride comfort and handling stability. Existing air spring bladders are mostly reinforced with two layers of cord, resulting in relatively high hysteresis, which affects ride comfort. Furthermore, the friction between the aluminum casing support ring and the bladder creates a risk of casing dislodging. Summary of the Invention

[0004] The purpose of the present invention is to provide an empty spring bag skin with a vulcanized support ring composite cord structure, so as to improve the comfort of the air spring and the stability of the aluminum casing.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hollow spring bag skin with a vulcanized support ring composite cord structure, including a bag skin, the bag skin is divided into a big head of the bag skin, a working area of ​​the bag skin and a small head of the bag skin, the big head of the bag skin is divided into a three-layer cord structure, the working area of ​​the bag skin and the small head of the bag skin are divided into a single-layer cord structure, and the overall thickness of the working area of ​​the bag skin and the small head of the bag skin is thinner than the thickness of the big head of the bag skin, the inner diameter of the working area of ​​the bag skin gradually decreases from the big head of the bag skin to the small head area of ​​the bag skin, and a support ring is fixed on the inner wall of the big head of the bag skin by vulcanization bonding.

[0006] As a further preferred embodiment of this solution, the support ring is located below the inside of the big end of the bladder skin and close to the transition section between the big end of the bladder skin and the working area of ​​the bladder skin.

[0007] As a further preferred embodiment of this solution, the bladder skin includes a first inner layer of rubber, an inner layer of cords, an intermediate layer of cords, an outer layer of cords and a first outer layer of rubber.

[0008] As a further preferred embodiment of this solution, the bladder skin working area and the bladder skin small head both contain a second inner layer of rubber, a single layer of cord and a second outer layer of rubber.

[0009] As a further preferred embodiment of this solution, the first inner rubber layer and the second inner rubber layer are the same layer of rubber that covers the interior of the bladder skin together.

[0010] As a further preferred embodiment of this solution, the inner layer cords and the single layer cords are the same layer of cords and run through the entire bladder.

[0011] As a further preferred embodiment of this solution, the vulcanized bonding surface of the support ring is phosphating-treated and coated with an adhesive layer, and the non-vulcanized bonding surface is sprayed with an electroplating coating.

[0012] The present invention has the following advantages: the single-layer cord design in the working area of ​​the hollow spring bladder effectively reduces the bladder thickness in the working area. This reduced thickness and the single-layer cord design together reduce the hysteresis force of the hollow spring. The support ring is bonded to the inner wall of the bladder by vulcanization, preventing the aluminum casing and the support ring from separating due to insufficient friction between the support ring, bladder, and aluminum casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the empty spring capsule skin;

[0014] Figure 2 Cross-sectional view of the end face of the bladder skin;

[0015] Figure 3 Cross-sectional view of the bladder skin working area and the end face of the small head;

[0016] Figure 4 Schematic diagram of cross distribution of big end cords;

[0017] Figure 5 Schematic diagram of cord distribution in the working area and small head;

[0018] Figure 6 Support ring structure diagram.

[0019] Markings in the figure are: 1 bladder, 2 support ring, a bladder big end, a-1 inner rubber, a-2 inner cord, a-3 middle cord, a-4 outer cord, a-5 first outer rubber, b bladder working area, a-1 inner rubber, a-2 inner cord, b-1 second outer rubber, b-2 single cord, c bladder small end, 2-1 support ring vulcanized bonding surface, 2-2 support ring non-vulcanized bonding surface. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 6The figure shows an empty spring bladder with a composite cord structure and a vulcanized support ring. The bladder 1 comprises a bladder head a, a working area b, and a small end c. The large end a comprises a three-layer cord structure, while the working area b and the small end c comprise a single-layer cord structure. The overall thickness of the working area b and the small end c is thinner than that of the large end a. The inner diameter of the working area b gradually decreases from the large end a to the small end c. A support ring 2 is fixed to the inner wall of the large end a via vulcanization bonding. The support ring 2 is located below the large end a and near the transition between the large end a and the working area b.

[0022] In this embodiment, the bladder skin head a comprises an inner rubber layer a-1, an inner cord a-2, an intermediate cord a-3, an outer cord a-4 and an outer rubber layer a-5. The cord distribution is shown in FIG. Figure 4 The inner rubber layer a-1 primarily provides airtightness, ensuring gas leakage during both operating and stopped states of the air spring assembly. The outer rubber layer a-5 primarily protects the cords and inner rubber layer from external environmental attack and provides airtightness. The inner cord a-2, middle cord a-3, outer cord a-4, outer rubber a-5, and inner rubber a-1 work together to ensure the expanded diameter and burst pressure of the air spring bladder during operation.

[0023] In this embodiment, the single-layer cord design in the bladder's working area b and small end c ensures product operating pressure while effectively reducing the bladder's thickness and enhancing its flexibility. The bladder's working area b and small end c comprise an inner rubber layer a-1, a single-layer cord b-2, and an outer rubber layer b-3. The inner rubber layer of the working area b and the inner rubber layer of the large end a form a single layer, covering the interior of the bladder. The single-layer cord and inner cord a-2 form a single layer, covering the entire bladder.

[0024] In this embodiment, the support ring 2 is bonded to the inner wall of the casing by vulcanization to secure the aluminum casing in place. The vulcanized bonding surface 2-1 of the support ring is phosphated and sprayed with adhesive to enhance the post-vulcanization bond between the metal and rubber. The non-vulcanized bonding surface 2-2 of the support ring is electroplated to prevent corrosion of the metal ring.

[0025] This hollow spring bladder has good applicability and can also be applied to straight-tube or special-shaped hollow spring bladders. Similarly, the support ring can also be vulcanized on the outer surface of the bladder.

[0026] In summary, the hollow spring bag skin adopts different reinforcement layer structure designs, which can not only ensure the product's expanded outer diameter and bursting pressure, but also effectively reduce the product thickness in the working area to improve its flexibility and reduce the hysteresis force of the hollow spring; effectively improve the product comfort, and fix the support ring through vulcanization bonding, thereby effectively fixing the position of the aluminum casing.

[0027] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the scope of protection of the present invention in any form. All technical solutions obtained by equivalent substitution and other methods fall within the scope of protection of the present invention. Parts not covered by the present invention are the same as the existing technology or can be implemented using existing technology.

Claims

1. A hollow spring bladder with a vulcanized support ring composite cord structure, comprising a bladder, wherein the bladder is divided into a bladder large end, a bladder working area and a bladder small end, characterized in that: The big head of the bladder skin is divided into a three-layer cord structure, the working area of ​​the bladder skin and the small head of the bladder skin are divided into a single-layer cord structure, and the overall thickness of the working area of ​​the bladder skin and the small head of the bladder skin is thinner than the thickness of the big head of the bladder skin. The inner diameter of the working area of ​​the bladder skin gradually decreases from the big head of the bladder skin to the small head area of ​​the bladder skin, and a support ring is fixed on the inner wall of the big head of the bladder skin by vulcanization bonding.

2. The hollow spring bag skin with a composite cord structure with a vulcanized support ring according to claim 1, characterized in that: The support ring is located below the inner portion of the bladder skin big end and close to the transition section between the bladder skin big end and the bladder skin working area.

3. The hollow spring bag skin with a composite cord structure with a vulcanized support ring according to claim 1, characterized in that: The bladder skin includes a first inner layer rubber, an inner layer cord, a middle cord, an outer layer cord and a first outer layer rubber.

4. The hollow spring bag skin with a composite cord structure with a vulcanized support ring according to claim 3, characterized in that: The bladder skin working area and the bladder skin small head both comprise a second inner layer of rubber, a single layer of cord and a second outer layer of rubber.

5. The hollow spring bag skin with a composite cord structure with a vulcanized support ring according to claim 4, characterized in that: The first inner rubber layer and the second inner rubber layer are the same layer of rubber and cover the interior of the bladder together.

6. The hollow spring bag skin with a composite cord structure with a vulcanized support ring according to claim 4, characterized in that: The inner layer cords and the single layer cords are the same layer of cords and run through the entire bladder skin.

7. The hollow spring bag skin with a composite cord structure with a vulcanized support ring according to claim 1, characterized in that: The vulcanized bonding surface of the support ring is phosphating-treated and coated with an adhesive layer, and the non-vulcanized bonding surface is sprayed with an electroplating coating.

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