An air spring assembly

Abstract

The utility model relates to an air spring assembly, including upper air chamber subassembly, upper pressure ring subassembly, air bag subassembly, lower pressure ring subassembly, piston subassembly, upper air chamber subassembly and air bag subassembly are connected through upper pressure ring subassembly buckle compression diameter deformation, air bag subassembly and piston subassembly are connected through lower pressure ring subassembly buckle compression diameter deformation, and the buckle pressure area of upper air chamber subassembly and piston subassembly is provided with sealed tooth type structure respectively, sealed tooth type structure includes a plurality of sealed teeth, and the section of sealed tooth is trapezoidal structure. The utility model discloses air spring assembly, and the sealed tooth type structure of air spring assembly is optimized, and the structural damage problem of air bag caused by tooth profile structure in the buckle compression process of air spring assembly is improved.

Description

Technical Field

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

[0002] Currently, most vehicles with air suspension on the market are equipped with air springs, which adjust the vehicle height by supplying and releasing air through an air supply unit. The airtightness of the air spring airbags is a necessary condition for achieving vehicle height stability. Gas leakage from the air spring airbags will affect the overall comfort, handling, and driving safety of the vehicle.

[0003] The toothed structure of the air spring's sealing teeth is one of the key factors affecting its airtightness. Most commercially available products use triangular sealing teeth, primarily isosceles or right-angled triangles, as illustrated in utility model patent CN 222277332 U. During assembly, the triangular sealing teeth require close monitoring of clamping pressure and displacement. Excessive clamping pressure and displacement can easily cause the triangular sealing teeth to puncture the inner rubber layer of the air spring casing, damaging the internal cord layer and affecting the airtightness and fatigue durability of the air spring's actuator, ultimately leading to air spring failure. Utility Model Content

[0004] Based on this, it is necessary to provide an air spring assembly to address the aforementioned technical problems in the existing technology. This assembly optimizes the sealing tooth structure of the air spring assembly, thereby improving the structural damage to the airbag caused by the tooth structure during the crimping process and mitigating the impact of high and low temperature changes in the operating environment on the airtightness of the air spring assembly. Furthermore, the optimization of the sealing tooth structure further prevents the risk of relative slippage between the airbag and the crimping ring and piston during the operation of the air spring assembly.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is as follows:

[0006] An air spring assembly includes an upper air chamber assembly, an upper pressure ring assembly, an air bladder assembly, a lower pressure ring assembly, and a piston assembly. The upper air chamber assembly and the air bladder assembly are connected by the upper pressure ring assembly through compression deformation, and the air bladder assembly and the piston assembly are connected by the lower pressure ring assembly through compression deformation. The compression areas of the upper air chamber assembly and the piston assembly are respectively provided with sealing tooth structures, and the sealing tooth structures include multiple sealing teeth with trapezoidal cross-sections.

[0007] In one feasible implementation, the sealing tooth structure includes a first tooth section and a second tooth section, wherein the height of the sealing tooth in the first tooth section is higher than the height of the sealing tooth in the second tooth section.

[0008] In one feasible implementation, the first tooth is located inside the second tooth.

[0009] In one feasible implementation, the sealing tooth structure further includes a third tooth located outside the second tooth, with the second tooth located between the third tooth and the first tooth.

[0010] In one feasible implementation, the height of the sealing tooth in the third tooth section is higher than the height of the sealing tooth in the first tooth section.

[0011] In one feasible implementation, the sealing tooth structure further includes a fourth tooth located inside the first tooth, with the first tooth located between the fourth tooth and the second tooth.

[0012] In one feasible implementation, the height of the sealing tooth in the fourth tooth section is higher than the height of the sealing tooth in the first tooth section, but lower than the height of the sealing tooth in the third tooth section.

[0013] In one feasible implementation, the length ratio of the first tooth to the second tooth is 1:(0.5~2).

[0014] The length ratio of the first tooth to the third tooth is 1:(0.1~1).

[0015] The length ratio of the first tooth to the fourth tooth is 1:(0.5~2).

[0016] In one feasible implementation, the ratio of the height of the sealing tooth in the second tooth section to the height of the sealing tooth in the first tooth section is 1:(1.1-1.7).

[0017] The ratio of the height of the sealing tooth in the second tooth section to the height of the sealing tooth in the third tooth section is 1:(2-3).

[0018] The ratio of the sealing tooth height in the second tooth section to the sealing tooth height in the fourth tooth section is 1:(1.6-2.1).

[0019] In one feasible implementation, the included angle between the two sides of the cross-section of the sealing tooth in the fourth tooth is between 55° and 65°.

[0020] The included angle of the inclined side of one side of the cross-section of the sealing tooth in the third tooth section is between 25° and 35°.

[0021] Due to the adoption of the above technical solutions, this utility model has the following advantages compared with the prior art:

[0022] 1. Existing air spring assemblies have a large number of sealing teeth, a small contact area between the teeth and the air bladder, consistent tooth height, and the same crimping rate, resulting in poor adaptability to different usage environments. This utility model adopts trapezoidal cross-section teeth, which effectively solves the problem of damage to the adhesive layer and fabric layer of the air spring assembly air bladder by the tooth structure during the crimping process.

[0023] 2. The sealing tooth structure of this utility model adopts a combination of high teeth and low teeth, which can effectively solve the gas leakage phenomenon of the air spring assembly caused by the change of the buckling ratio of the airbag skin due to changes in ambient temperature, and effectively increase the airtightness between the airbag and the upper air chamber and piston.

[0024] 3. The sealing tooth structure of this utility model adopts a front-low and rear-high tooth shape, which can prevent the risk of relative slippage between structural components in the pressing area, prevent relative slippage after the airbag is assembled with the upper air chamber and piston, increase the pull-out force with the hand component, and improve the safety of the air spring assembly. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the air spring assembly of this utility model;

[0026] Figure 2 This is a schematic diagram of the upper end component of the piston assembly of this utility model;

[0027] Figure 3 for Figure 2 Enlarged schematic diagram of local structure A in the middle;

[0028] Figure 4 for Figure 3 Enlarged schematic diagram of local structure B in the middle;

[0029] Figure 5 for Figure 3 A magnified schematic diagram of local structure C in the middle.

[0030] Among them: 10. Upper air chamber assembly;

[0031] 20. Upper pressure ring assembly;

[0032] 30. Airbag assembly;

[0033] 40. Pressure ring assembly;

[0034] 50. Piston assembly;

[0035] 60. Sealed tooth structure; 61. First tooth; 62. Second tooth; 63. Third tooth; 64. Fourth tooth. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," and similar expressions used in this document are for illustrative purposes only.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, " / " means "or".

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Currently, most air spring products on the market use triangular sealing teeth, primarily isosceles or right-angled triangular teeth. During assembly, triangular sealing teeth require stringent monitoring of clamping pressure and displacement. Excessive clamping pressure and displacement can easily cause the triangular sealing teeth to puncture the inner rubber layer of the bladder, damaging the internal cord layer and affecting the airtightness and fatigue durability of the air spring actuator, ultimately leading to air spring malfunction.

[0041] Based on this, the present invention provides an air spring assembly, including an upper air chamber assembly, an upper pressure ring assembly, an air bladder assembly, a lower pressure ring assembly, and a piston assembly. The upper air chamber assembly and the air bladder assembly are connected by the upper pressure ring assembly through compression deformation, and the air bladder assembly and the piston assembly are connected by the lower pressure ring assembly through compression deformation. The compression areas of the upper air chamber assembly and the piston assembly are respectively provided with sealing tooth structures, and the sealing tooth structures include multiple sealing teeth with trapezoidal cross-sections.

[0042] This utility model relates to an air spring assembly. It optimizes the sealing tooth structure of the air spring assembly, thereby improving the structural damage to the airbag caused by the tooth structure during the crimping process and mitigating the impact of high and low temperature changes in the operating environment on the airtightness of the air spring assembly. Furthermore, the optimization of the sealing tooth structure further prevents the risk of relative slippage between the airbag and the crimping ring and piston during operation.

[0043] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in detail below with reference to specific embodiments.

[0044] This embodiment provides an air spring assembly, including an upper air chamber assembly 10, an upper pressure ring assembly 20, an air bladder assembly 30, a lower pressure ring assembly 40, and a piston assembly 50.

[0045] The upper air chamber assembly 10 and the airbag assembly 30 are connected by the upper pressure ring assembly 20 through compression ring deformation. Similarly, the airbag assembly 30 and the piston assembly 50 are connected by the lower pressure ring assembly 40 through compression ring deformation. These two compression ring processes complete the assembly of the upper air chamber assembly 10, the airbag assembly 30, and the piston assembly 50. Specifically, the lower end of the upper air chamber assembly 10 is connected to the upper part of the airbag assembly 30 via the upper pressure ring assembly 20, and the lower part of the airbag assembly 30 is connected to the upper end of the piston assembly 50 via the lower pressure ring assembly 40.

[0046] To enhance the airtightness, clamping force range, and relative sliding resistance among the upper air chamber assembly 10, airbag assembly 30, and piston assembly 50, sealing tooth structures 60 are respectively provided in the clamping areas of the upper air chamber assembly 10 and the piston assembly 50. The sealing tooth structure 60 includes multiple spaced or connected sealing teeth. In this embodiment, the sealing teeth are spaced apart, and the cross-section of the sealing teeth is trapezoidal. Specifically, a lower end member is provided on the lower end of the upper air chamber assembly 10, and the upper pressure ring assembly 20 clamps onto this lower end member, forming a clamping area on the lower end member. The sealing tooth structure 60 is disposed on the clamping area. An upper end member is provided on the upper end of the piston assembly 50, and the lower pressure ring assembly 40 clamps onto this upper end member, forming a clamping area on the upper end member. The sealing tooth structure 60 is disposed on the clamping area.

[0047] In this embodiment, the sealing tooth structure 60 adopts a trapezoidal cross section, which increases the contact area between the clamping tooth and the airbag assembly 30, increases the clamping force range (16Mpa~27Mpa) during the clamping process of the air spring assembly, and improves the fault tolerance rate during the assembly process.

[0048] The following is a detailed description of the sealing tooth structure 60 provided in the crimping area of ​​the piston assembly 50.

[0049] In this embodiment, the sealing tooth structure 60 includes a first tooth 61 and a second tooth 62 that provide sealing at both room temperature and high temperature. The height of the sealing teeth in the first tooth 61 is higher than the height of the sealing teeth in the second tooth 62. The first tooth 61 is located inside the second tooth 62. Here, the inner and outer are defined with reference to the piston assembly 50; the side farther from the piston assembly 50 is defined as the outer side, and the side closer to the piston assembly 50 is defined as the inner side.

[0050] The ratio of the height of the sealing tooth in the second tooth portion 62 to the height of the sealing tooth in the first tooth portion 61 is 1:(1.1-1.7), specifically 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, and preferably 1:1.5 in this embodiment.

[0051] In this embodiment, the sealing tooth structure 60 adopts a front-low and rear-high tooth arrangement, which can prevent the risk of relative slippage between structural components in the air spring assembly's clamping area.

[0052] In this embodiment, the sealing tooth structure 60 further includes a third tooth 63 that prevents the pressure ring assembly 40 from slipping. The third tooth 63 is located outside the second tooth 62, and the second tooth 62 is located between the third tooth 63 and the first tooth 61. The height of the sealing tooth in the third tooth 63 is higher than the height of the sealing tooth in the first tooth 61.

[0053] The ratio of the height of the sealing tooth in the second tooth section 62 to the height of the sealing tooth in the third tooth section 63 is 1:(2-3); specifically, it can be 1:2, 1:2.1, 1:2.2, 1:2.3, 1:2.4, 1:2.5, 1:2.6, 1:2.7, 1:2.8, 1:2.9, or 1:3. In this embodiment, it is preferably 1:2.5.

[0054] The included angle of the inclined side of one side of the cross section of the sealing tooth in the third tooth 63 is between 25° and 35°. Here, the included angle is the angle between the inclined side of one side of the cross section of the sealing tooth in the third tooth 63 and the horizontal line. Specifically, it can be 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, and preferably 30°.

[0055] In this embodiment, the sealing tooth structure 60 further includes a fourth tooth 64 that serves as a low-temperature seal. The fourth tooth 64 is located inside the first tooth 61, and the first tooth 61 is located between the fourth tooth 64 and the second tooth 62. The height of the sealing tooth in the fourth tooth 64 is higher than the height of the sealing tooth in the first tooth 61, but lower than the height of the sealing tooth in the third tooth 63.

[0056] The ratio of the height of the sealing tooth in the second tooth section 62 to the height of the sealing tooth in the fourth tooth section 63 is 1:(1.6-2.1), specifically 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2, 1:2.1. In this embodiment, 1:1.9 is preferred.

[0057] The included angle α of the two inclined sides of the cross section of the sealing tooth in the fourth tooth 64 is between 55° and 65°, specifically 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, preferably 60°.

[0058] The angle between the third tooth 63 and the fourth tooth 64 in this invention can improve the flowability of the airbag assembly 30 during the buckling process.

[0059] In this embodiment, the length ratio of the first tooth 61 to the second tooth 62 is 1:(0.5~2), specifically 1:0.5, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.5, 1:1.7, 1:1.9, preferably 1:1;

[0060] The length ratio of the first tooth 61 to the third tooth 63 is 1:(0.1~1), specifically 1:0.2, 1:0.3, 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, preferably 1:0.5;

[0061] The length ratio of the first tooth 61 to the fourth tooth 64 is 1:(0.5~2), specifically 1:0.5, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.5, 1:1.7, 1:1.9, preferably 1:1.

[0062] In this embodiment, the sealing tooth structure 60 adopts a high and low tooth shape, which can effectively control the airtightness of the rubber layer inside the air spring airbag under different operating ambient temperatures, so that the airbag rubber layer is in a reasonable elastic range in high and low temperature environments.

[0063] In this embodiment, the sealing tooth structure 60 provided in the pressing area of ​​the upper air chamber assembly 10 has the same structural configuration as the sealing tooth structure 60 provided in the pressing area of ​​the piston assembly 50, and thus has the beneficial effects brought about by the above-mentioned structure, which will not be elaborated here.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An air spring assembly, characterized in that, The assembly includes an upper air chamber assembly (10), an upper pressure ring assembly (20), an airbag assembly (30), a lower pressure ring assembly (40), and a piston assembly (50). The upper air chamber assembly (10) and the airbag assembly (30) are connected by the upper pressure ring assembly (20) through compression deformation. The airbag assembly (30) and the piston assembly (50) are connected by the lower pressure ring assembly (40) through compression deformation. The compression areas of the upper air chamber assembly (10) and the piston assembly (50) are respectively provided with sealing tooth structure (60). The sealing tooth structure (60) includes multiple sealing teeth, and the cross-section of the sealing teeth is trapezoidal.

2. The air spring assembly according to claim 1, characterized in that, The sealing tooth structure (60) includes a first tooth (61) and a second tooth (62), wherein the height of the sealing tooth in the first tooth (61) is higher than the height of the sealing tooth in the second tooth (62).

3. The air spring assembly according to claim 2, characterized in that, The first tooth (61) is located inside the second tooth (62).

4. The air spring assembly according to claim 2, characterized in that, The sealing tooth structure (60) further includes a third tooth (63), which is located outside the second tooth (62), and the second tooth (62) is located between the third tooth (63) and the first tooth (61).

5. The air spring assembly according to claim 4, characterized in that, The height of the sealing tooth in the third tooth section (63) is higher than the height of the sealing tooth in the first tooth section (61).

6. The air spring assembly according to claim 4, characterized in that, The sealing tooth structure (60) further includes a fourth tooth (64), which is located inside the first tooth (61), and the first tooth (61) is located between the fourth tooth (64) and the second tooth (62).

7. The air spring assembly according to claim 6, characterized in that, The height of the sealing tooth in the fourth tooth section (64) is higher than the height of the sealing tooth in the first tooth section (61) and lower than the height of the sealing tooth in the third tooth section (63).

8. The air spring assembly according to claim 6, characterized in that, The length ratio of the first tooth (61) to the second tooth (62) is 1:(0.5~2); The length ratio of the first tooth (61) to the third tooth (63) is 1:(0.1~1). The length ratio of the first tooth (61) to the fourth tooth (64) is 1:(0.5~2).

9. The air spring assembly according to claim 6, characterized in that, The ratio of the height of the sealing tooth in the second tooth section (62) to the height of the sealing tooth in the first tooth section (61) is 1:(1.1-1.7). The ratio of the height of the sealing tooth in the second tooth section (62) to the height of the sealing tooth in the third tooth section (63) is 1:(2-3); The ratio of the height of the sealing tooth in the second tooth section (62) to the height of the sealing tooth in the fourth tooth section (64) is 1:(1.6-2.1).

10. The air spring assembly according to claim 6, characterized in that, The angle between the two sides of the cross-section of the sealing tooth in the fourth tooth (64) is between 55° and 65°; The angle between the inclined side of one side of the cross section of the sealing tooth in the third tooth (63) is between 25° and 35°.

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