Air spring with double-side-wall structure

Abstract

The utility model belongs to the technical field of air springs, and particularly relates to an air spring with a double-side-wall structure, which comprises an outer spring body provided with a corrugated outer wall fluctuating in the vertical direction; the inner spring body is provided with a corrugated inner wall fluctuating in the vertical direction, and the inner spring body is embedded in the hollow cavity of the outer spring body; the outer spring body and the inner spring body are combined on the base, and the upper end parts of the outer spring body and the inner spring body are welded at high frequency. According to the air spring, through the unique double-side-wall structure, the inner spring body and the outer spring body are ingeniously fused and are both designed to be of a barrel-shaped structure, the inner spring body is embedded in the outer spring body to form the annular air chamber, and compared with a traditional cylindrical air chamber, the size of the spring body is remarkably reduced under the condition of the same outer diameter, and the service life of the spring body is prolonged. And the response speed of air pressure adjustment is increased. And meanwhile, the anti-toppling performance of the spring body can be improved by increasing the diameter of the outer edge of the air chamber, the bearing reliability is improved, and quicker and smoother hardness adjusting experience is brought to a user.

Description

Technical Field

[0001] This application relates to the field of air spring technology, and more specifically to an air spring with a double-sided wall structure. Background Technology

[0002] An air spring (also known as a pneumatic spring) is a device that utilizes the elastic properties of compressed air to provide support, damping, or height adjustment. It offers the following advantages: 1. Adjustable stiffness: adaptable to different load requirements by changing the air pressure; 2. Strong damping performance: effectively absorbs high-frequency vibrations and impacts; 3. Long service life: fatigue-resistant and anti-aging due to its rubber and cord layer structure; 4. Energy-saving and environmentally friendly: requires no complex mechanical structure during use, reducing energy consumption. Its stiffness and load-bearing capacity can be changed by adjusting the internal air pressure, thus making it widely used in many fields.

[0003] Current mattresses also include air springs in their air cushions. Because the air pressure inside the air springs is adjustable, the firmness of the cushion can be adjusted. Existing air springs on the market include one-piece molded, cylindrical springs. However, these air springs have the following drawbacks: Due to the large space inside the cylindrical spring, adjusting the air pressure requires a large flow of gas inflation and deflation, resulting in a slower pressure adjustment speed. This, in turn, affects the responsiveness of the air mattress to meet the user's varying needs for firmness support. Furthermore, traditional cylindrical air springs have poor anti-rollover performance; under greater pressure, the spring may tilt and roll over.

[0004] Therefore, in order to address the shortcomings of the above-mentioned technologies, a new type of air spring is provided, which can solve the problems of slow response speed when adjusting the stiffness of traditional air springs and poor anti-rollover performance when the spring body is tilted. Utility Model Content

[0005] This application provides an air spring with a double-sided wall structure to solve the problems of traditional air springs, such as high processing difficulty, slow response speed, and poor anti-rollover performance.

[0006] To achieve the above objectives, this application adopts the following technical solution: an air spring with a double-sidewall structure, comprising:

[0007] The outer spring body has a corrugated outer wall that undulates in the vertical direction;

[0008] An inner spring body, having a corrugated inner wall that undulates in the vertical direction, is embedded within the hollow cavity of an outer spring body; and

[0009] The base, outer spring body, and inner spring body are all attached to the base;

[0010] The upper ends of the outer spring body and the inner spring body are high-frequency welded, and the lower ends of the outer spring body and / or the inner spring body are high-frequency welded to the base.

[0011] Furthermore, the outer spring body also includes an outer straight wall, which is attached to the lower end of the corrugated outer wall to support the undulation of the corrugated outer wall and maintain the verticality of the outer spring body.

[0012] Furthermore, the inner spring body also includes an inner straight wall, which is attached to the lower end of the corrugated inner wall to support the undulation of the corrugated inner wall and maintain the verticality of the inner spring body.

[0013] Furthermore, the upper ends of the inner and outer springs form an annular pressure-bearing part.

[0014] Furthermore, the annular pressure-bearing part is integrally injection molded with the outer spring body or the inner spring body.

[0015] Furthermore, the expansion ratio λ1 of the corrugated outer wall and the expansion ratio λ2 of the corrugated inner wall are configured such that λ1 ≥ λ2.

[0016] Furthermore, the inner spring body and the outer spring body are welded together to form an annular air chamber, which is equipped with an air passage connecting to the outside.

[0017] Furthermore, it also has a massage element, which is disposed in the hollow cavity of the inner spring body, and the massage element is provided with an air passage connecting to the outside.

[0018] Furthermore, a sponge is placed between the massage piece and the base.

[0019] The beneficial effects of this utility model are: This application proposes a double-side-wall structure air spring, which breaks through the limitations of traditional cylindrical air springs. Through the unique double-side-wall structure, it achieves improved response speed for adjusting the spring's stiffness, enhanced pressure-bearing capacity, and optimized anti-tipping performance.

[0020] This double-sided air spring cleverly integrates an inner and outer spring body, both of which are cylindrical structures. The inner spring body is housed within the hollow cavity of the outer spring body, forming an annular air chamber. This annular air chamber design not only provides space for adjusting the spring's inflation and deflation but also significantly reduces the spring's volume compared to traditional cylindrical air chambers, greatly improving the response speed of air pressure adjustment. Simultaneously, the air spring can enhance its anti-tipping performance and improve support reliability by increasing the outer diameter of the air chamber, providing users with a faster and smoother experience of adjusting the spring's firmness. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the appearance of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the air spring in this utility model;

[0024] Figure 4 This is a schematic diagram of another embodiment of the present invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of the massage component in this utility model.

[0026] Explanation of the reference numerals in the figure:

[0027] 110. Outer spring body; 111. Corrugated outer wall; 112. Outer straight wall;

[0028] 120. Inner spring body; 121. Corrugated inner wall; 122 / 122'. Inner straight wall;

[0029] 130. Pressure-bearing part;

[0030] 140. Annular air chamber;

[0031] 200, base; 300, air path one; 400, massage piece; 500, air path two; 600, sponge. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] Example 1:

[0035] This patent application proposes an air spring with a double-sided wall structure. This design breaks through the limitations of traditional cylindrical air springs. Through the unique double-sided wall structure, it achieves improved response speed for adjusting the spring's stiffness, enhanced pressure resistance, and optimized anti-tipping performance.

[0036] like Figure 1-5 As shown, this embodiment provides an air spring with a double-sidewall structure, which has an outer spring body 110 and an inner spring body 120, wherein:

[0037] The outer spring body 110 has a corrugated outer wall 111, the inner spring body 120 has a corrugated inner wall 121, the corrugated outer wall 111 allows the outer spring body 110 to undulate along its own axis, and the corrugated inner wall 121 allows the inner spring body 120 to undulate along its own axis; and the base 200.

[0038] Both the outer spring body 110 and the inner spring body 120 are cylindrical, with the inner spring body 120 positioned on the inner ring side of the outer spring body 110. The upper ends of the inner spring body 120 and the outer spring body 110 are high-frequency welded, and the lower ends of the inner spring body 120 and the outer spring body 110 are also high-frequency welded to the base 200. The lower ends of the outer spring body 110 and the inner spring body 120 can be respectively connected by high-frequency welding.

[0039] It is connected to the base 200, or one of the inner spring body 110 and the outer spring body 120 is integrated with the base 200 by integral injection molding.

[0040] After the inner spring body 120, the outer spring body 110, and the base 200 are welded together, an annular air chamber 140 is formed.

[0041] The air spring also includes a pressure-bearing portion 130, which is configured as a ring. The upper ends of the inner spring body 120 and the outer spring body 110 are connected to the pressure-bearing portion 130 by high-frequency welding. Similarly, the pressure-bearing portion 130 can also be integrally molded with one of the inner spring body 120 or the outer spring body 110 by injection molding, or connected to the inner spring body 120 and the outer spring body 110 respectively by high-frequency welding.

[0042] The air spring is configured to allow its stiffness to be adjusted by changing the pressure within the annular air chamber 140.

[0043] Furthermore, the outer spring body 110 has at least one outer straight wall 112, which is attached to the lower edge of the corrugated outer wall 111 to support the undulation of the corrugated outer wall 111 and maintain the verticality of the outer spring body 110; the inner spring body 120 has at least one inner straight wall 122, which is attached to the lower edge of the corrugated inner wall 121 to support the undulation of the corrugated inner wall 121 and maintain the verticality of the inner spring body 120.

[0044] Traditional cylindrical air springs have a large internal volume, requiring inflation to adjust the spring's firmness. This large volume results in slow adjustment speeds and a poor user experience. In contrast, the annular sealed air chamber, while having the same outer diameter as a cylindrical chamber, has a smaller volume. This allows the double-sided wall air spring of this application to effectively reduce the amount of air required for pressure adjustment without reducing the outer diameter of the air spring. This significantly shortens the pressure adjustment time in response to user adjustments, effectively improving the pressure adjustment response speed and enhancing the user experience.

[0045] Meanwhile, since the upper end of the entire spring is under pressure, the pressure-bearing surface of a conventional cylindrical air spring is the circular surface at the upper end of the spring. The pressure-bearing part 130 in this application is configured as an annular plane. The annular pressure-bearing part 130 has good pressure-bearing performance while taking into account the inflation response speed of the air spring.

[0046] Furthermore, the double-sided air spring in this application can not only improve the adjustment response speed by reducing the air chamber volume, but also improve the anti-tipping performance of the air spring and improve the reliability of the spring support by increasing the outer diameter of the air chamber.

[0047] As a further preferred embodiment, since the corrugated wall is expandable in response to the inflation and deflation of the spring, the corrugated wall is configured as a bellows in this application. Since the bellows has good extensibility, it can meet the needs of adjusting and changing the softness and height when the air spring is inflated.

[0048] Traditional cylindrical air springs also employ bellows or corrugated air bladders for inflation adjustment. However, in traditional air springs, the edge of the spring (i.e., the edge of the bellows) is welded to the base 200. Since the bellows is constantly in motion during inflation and not in a stable, fixed state under pressure, the welded joint between the bellows and the base is subjected to dynamic pressure for extended periods. When the user lies down, the uneven force on the air spring causes it to tilt, resulting in stress concentration at the welded joint between the bellows and the base. This stress concentration accelerates material wear, leading to fatigue failure and ultimately, spring rupture and loss of airtightness.

[0049] Reference Figure 2-3As a further preferred embodiment, the outer spring body 110 is equipped with an outer straight wall 112. This design allows the outer spring body 110 to flexibly extend, retract, and undulate along its axial direction, while simultaneously providing good support and anti-tipping properties to adapt to different pressure changes. Similarly, the inner spring body 120 is also equipped with an inner straight wall 122, giving the inner spring body 120 extension and retraction capabilities while ensuring good support and anti-tipping performance. The straight wall structure design not only increases the rigidity of the air spring but also reduces material consumption during product manufacturing.

[0050] To further support the stable expansion and contraction of these flexible parts, while maintaining the verticality of the walls and effectively preventing stress concentration in the flexible parts, the outer spring body 110 may be provided with at least one outer straight wall 112, and the inner spring body 120 may be provided with at least one inner straight wall 122. In actual production, the composite structure of multiple straight walls and corrugated walls, and the tight combination of these straight walls and corrugated walls, form a stable support structure. This not only shortens the length of the bellows and reduces material costs, but also maximizes the ability of the spring itself to bear and mitigate the unbalanced pressure transmitted at the pressure-bearing part 130. This effectively avoids stress concentration and fatigue damage that may occur in the corrugated walls under long-term dynamic pressure conditions, thereby significantly extending the service life of the air spring.

[0051] Reference Figure 4 As another alternative implementation, for the inner spring body 120 and the outer spring body 110 of the spring, the corrugated wall and the straight wall are formed by integral injection molding. The integral injection molding process can effectively eliminate cracking and welding problems that occur in the form of gluing or welding, which can ensure the structural strength of the connection and the airtightness of the spring after molding.

[0052] When the pressure-bearing part 130 is welded to the inner spring body 120 and the outer spring body 110, the inner and outer spring bodies 110 are respectively sealed and welded to the inner and outer rings of the pressure-bearing part 130 to seal the annular air chamber. In order to simplify the processing steps, the pressure-bearing part 130 and either the inner spring body 120 or the outer spring body 110 are integrally injection molded. In this embodiment, the inner spring body 120 and the pressure-bearing part 130 are integrally injection molded, which eliminates the step of high-frequency welding between the pressure-bearing part 130 and the inner spring body 120.

[0053] After the support part and the inner spring body 120 are integrally injection molded, they are fitted into the inner ring side of the outer spring body 110, and the outer ring end of the support part is welded to the upper edge of the outer spring body 110. In order to enhance the reliability of the weld and ensure the quality of the product, laser welding is preferred.

[0054] We know that the expansion and contraction performance of bellows is one of its important characteristics. Due to the structural design of bellows, its length can be adjusted by the expansion and contraction of the corrugations. The expansion and contraction ratio of bellows refers to the ratio of the amount of expansion and contraction of the bellows in the axial direction to its original length. The expansion and contraction ratio of bellows is generally between 5% and 15%, which enables it to maintain a relatively stable state under different pressure changes.

[0055] As a preferred embodiment, due to the difference in edge diameter between the inner spring body 120 and the outer spring body 110, in order to balance the expansion and contraction performance of the air spring, we choose to configure the corrugated outer wall 111 of the outer spring body 110 and the corrugated inner wall 121 of the inner spring body 120 as corrugated tubes with approximately the same expansion and contraction ratio. In actual use, in order to ensure the verticality and rigidity of the air spring after inflation, the expansion and contraction ratio λ1 of the corrugated outer wall 111 is usually slightly larger than the expansion and contraction ratio λ2 of the corrugated inner wall 121. This makes the inner spring body 120 tighter than the outer spring body 110 after inflation, thus exerting an inward pulling force on the outer spring body 110. In this embodiment, we preferentially select two flexible parts (i.e., the corrugated tubes in the inner and outer walls) with the same expansion and contraction ratio, and set their values ​​to λ1=λ2=10%.

[0056] Furthermore, to ensure that multiple air springs can be arranged side by side, when configuring an air passage 300 (air pipe) connecting to the outside in the annular air chamber 140, the air pipe can be welded at the same time as the support part is welded to the base 200. Alternatively, to further save production steps, the air pipe can be directly set at the bottom of the base 200. Medical silicone air pipe is preferred. It should be noted that when configuring the air pipe in the annular air chamber 140, the position of the air pipe can be set on one side of the outer straight wall 112, or it can be set on the base 200 or even on the inner straight wall 122 of the inner spring body 120. This embodiment does not make specific limitations on this, and it is also considered to fall within the protection scope of this application.

[0057] As an optional implementation method, refer to Figure 2 Since the air spring has a double-sided ring structure after molding, there is a gap in the middle. We place a massage element 400 at the gap in the middle of the air spring (i.e., the inner ring side of the inner spring body 120) to massage the user when the user is lying down. The massage element 400 is preferably an inflatable air spring (massage spring), and an air passage 2 500 is configured to control the inflation and deflation of this massage spring. In order to optimize the layout of this product and make the structure reasonable and compact, the air passage 1 300 (air tube) and the air passage 2 500 are arranged on the same side of the product, so that they are led out from one side of the base 200.

[0058] Furthermore, to improve the response speed of the massage springs while reducing their size and production costs, a sponge 600 is filled between the base 200 and the massage springs. When multiple air springs are combined to form an air mattress, the sponge 600 also improves sound insulation. The hollow center of each air spring also allows for the installation of ventilation ducts to increase airflow and enhance the user's comfort.

[0059] It should be noted that the outer spring body 110 and inner spring body 120 disclosed in this embodiment are preferably cylindrical, and the air spring is also cylindrical. However, in actual production, to adapt to the production needs of mattresses, such as when the spring is arranged on the side of the mattress, the air spring can also adopt a square or other polygonal cylindrical double-side-wall structure. In this application, the air spring is preferably cylindrical because it has balanced load-bearing performance, but using other shapes of air springs to form other shapes of annular air chambers 140 similar to annular air chambers is also considered to fall within the protection scope of this application.

[0060] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An air spring with a double-sidewall structure, characterized in that, include: The outer spring body has a corrugated outer wall that undulates in the vertical direction; An inner spring body having a corrugated inner wall that undulates in the vertical direction, the inner spring body being embedded within the hollow cavity of an outer spring body; and The base, on which both the outer spring and the inner spring are attached; The upper ends of the outer spring body and the inner spring body are high-frequency welded, and the lower ends of the outer spring body and / or the inner spring body are high-frequency welded to the base.

2. The air spring with a double-sidewall structure according to claim 1, characterized in that, The outer spring body also includes an outer straight wall, which is attached to the lower end of the corrugated outer wall to support the undulation of the corrugated outer wall and maintain the verticality of the outer spring body.

3. The air spring with a double-sidewall structure according to claim 1 or 2, characterized in that, The inner spring body also includes an inner straight wall, which is attached to the lower end of the corrugated inner wall to support the undulation of the corrugated inner wall and maintain the verticality of the inner spring body.

4. The air spring with a double-sidewall structure according to claim 1, characterized in that, The upper ends of the inner spring and the outer spring form an annular pressure-bearing part.

5. The air spring with a double-sidewall structure according to claim 4, characterized in that, The annular pressure-bearing part is integrally injection molded with the outer spring body or the inner spring body.

6. The air spring with a double-sidewall structure according to claim 1, characterized in that, The expansion ratio λ1 of the corrugated outer wall and the expansion ratio λ2 of the corrugated inner wall are configured such that λ1 ≥ λ2.

7. The air spring with a double-sidewall structure according to claim 1, characterized in that, An annular air chamber is formed between the inner spring body and the outer spring body, and the annular air chamber is equipped with an air passage connecting to the outside.

8. The air spring with a double-sidewall structure according to claim 1, characterized in that, It also has a massage component, which is disposed in the hollow cavity of the inner spring body, and the massage component is provided with an air passage connecting to the outside.

9. The air spring with a double-sidewall structure according to claim 8, characterized in that, A sponge is provided between the massage element and the base.

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