Air spring cover plate having radial support force

Abstract

The utility model provides a kind of air spring cover plate with radial support force, it is related to air spring technical field, including cover plate body, the cover plate body is discoid structure, the lower surface of the cover plate body is integrally formed with coaxially arranged first radial support ring and second radial support sleeve;The first radial support ring is annular protrusion, its inner wall is equipped with annular clamping groove, the elastic buffer layer is fixedly arranged in the clamping groove by vulcanization process;By first radial support ring and second radial support sleeve from inside and outside two sides clamping air bag provides main support, wherein the pressure relief through-hole on support sleeve can balance air pressure, improve stress distribution;Elastic buffer layer ensures flexible clamping seal, and the O-ring in the sealing groove of outside constitutes main seal defense line, combined with mounting bolt hole realizes overall fixation, the central rubber limiting block provides buffer protection when limit compression, jointly realizes strong support, long life and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of air spring technology, and in particular to an air spring cover plate with radial support force. Background Technology

[0002] An air spring is a vibration damping element that uses compressed air in a closed cavity to form an elastic medium. With its excellent vibration isolation performance, natural nonlinear stiffness and constant natural frequency, it is widely used in automotive suspension, rail transportation, industrial machinery and precision instrument vibration isolation and other fields.

[0003] However, existing air spring covers with radial support have several drawbacks. In the use of these covers, the structure does not provide sufficient radial support for the airbag, which makes the airbag prone to abnormal deformation and wear under high pressure. The support parts are poorly designed, resulting in severe stress concentration and a risk of fatigue fracture. The sealing solution is also limited, making it prone to gas leakage under vibration conditions. Furthermore, the lack of a pressure balancing mechanism leads to uneven local pressure on the airbag, affecting normal operation and shortening its service life. Therefore, an air spring cover with radial support is needed. Utility Model Content

[0004] The purpose of this invention is to provide an air spring cover with radial support force, which solves the problems of insufficient radial support, breakage of support parts, air leakage and uneven pressure in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air spring cover plate with radial support force, comprising a cover plate body, the cover plate body having a disc-shaped structure, and a primary radial support ring and a secondary radial support sleeve integrally formed on the lower surface of the cover plate body; the primary radial support ring is an annular protrusion, and its inner wall has an annular groove, in which an elastic buffer layer is fixedly disposed by a vulcanization process; the secondary radial support sleeve is located radially inside the primary radial support ring, and its height is higher than that of the primary radial support ring; the wall of the secondary radial support sleeve has a plurality of pressure-reducing through holes evenly distributed along its circumference, the pressure-reducing through holes being circular holes that axially penetrate the upper and lower end faces of the secondary radial support sleeve and extend upward to the interior of the cover plate body to form blind holes; the lower surface of the cover plate body has an annular sealing groove located outside the primary radial support ring, the edge of the cover plate body has mounting bolt holes, and a rubber limiting block is located at its center.

[0006] Preferably, the outer diameter of the primary radial support ring is adapted to the upper outer ring of the air spring airbag, and the inner diameter of the secondary radial support sleeve is adapted to the upper inner ring of the air spring airbag.

[0007] Preferably, the elastic buffer layer is made of rubber, and its inner surface is used to fit tightly against the outer ring of the air spring bladder.

[0008] Preferably, the axis of the pressure-reducing through hole is parallel to the axis of the secondary radial support sleeve.

[0009] Preferably, the limiting block is coaxially arranged with the secondary radial support sleeve.

[0010] Preferably, the cross-section of the sealing groove is trapezoidal to accommodate the O-ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The radial deformation of the airbag is effectively constrained by the inner and outer clamping of the primary support ring and the secondary support sleeve. The unique circular pressure relief through hole design not only achieves pressure balance but also greatly improves stress distribution and avoids the generation of fatigue cracks. The outer main sealing groove and the inner elastic buffer layer form a double sealing guarantee to ensure airtightness. The central rubber limit block provides effective overpressure protection. Attached Figure Description

[0013] Figure 1 This is a top view of the overall structure of the product of this utility model;

[0014] Figure 2 This is a bottom view of the overall structure of the product of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the cover plate body of the present utility model product;

[0016] Figure 4 This is a schematic cross-sectional view of the primary radial support ring structure of the present invention.

[0017] Figure 5 This is an enlarged structural diagram of section A of the product of this utility model.

[0018] In the diagram: 1. Cover plate body; 2. Primary radial support ring; 3. Secondary radial support sleeve; 4. Elastic buffer layer; 5. Pressure relief through hole; 6. Sealing groove; 7. Mounting bolt hole; 8. Limiting block. Detailed Implementation

[0019] 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.

[0020] This utility model relates to an air spring cover plate with radial support force, such as Figure 1-5 As shown, it includes a cover plate body 1, which serves as the base of the entire structure. It is usually made of metal materials, such as aluminum alloy, by casting or forging, and has sufficient strength and rigidity.

[0021] On the lower surface of the cover plate body 1, the side that contacts the air spring airbag, all support and sealing structures are machined in one piece. The one-piece design ensures the overall structural strength and stability. First, two main support structures are coaxially set on the lower surface of the cover plate body 1: a primary radial support ring 2 and a secondary radial support sleeve 3.

[0022] Furthermore, the primary radial support ring 2 is an annular protrusion extending downward from the lower surface of the cover plate body 1. Its outer diameter is designed to match the outer ring of the upper end of the air spring airbag, and is used to wrap and position the airbag from the outside. An annular groove 9 is provided on the inner wall of the primary radial support ring 2.

[0023] Furthermore, an elastic buffer layer 4 is fixedly disposed within the slot 9 through a vulcanization process. This elastic buffer layer 4 is preferably made of rubber, and its inner surface slightly protrudes from the inner wall of the primary radial support ring 2. In the assembled state, the upper end of the airbag is pressed into the inner side of the primary radial support ring 2, causing the inner surface of the elastic buffer layer 4 to form an interference fit and tightly adhere to the outer ring of the airbag. Its function is to provide a flexible clamping force, preventing rigid parts from cutting the airbag, acting as an auxiliary seal to prevent high-pressure gas from leaking from the clamping point, and absorbing some vibration energy.

[0024] Furthermore, the secondary radial support sleeve 3 is located radially inside the primary radial support ring 2, and its height is higher than that of the primary radial support ring 2. The inner diameter of the secondary radial support sleeve 3 is adapted to the inner ring of the upper end of the air spring airbag, and is used to support the airbag from the inside to prevent it from over-expanding or deforming under pressure. The synergistic effect of the primary radial support ring 2 and the secondary radial support sleeve 3 together constitutes a strong radial support force on the upper end of the airbag.

[0025] Furthermore, the wall of the secondary radial support sleeve 3 is provided with multiple pressure-reducing through holes 5 evenly distributed along its circumference. These pressure-reducing through holes 5' are circular holes that axially penetrate the upper and lower end faces of the secondary radial support sleeve 3 and extend upwards into the interior of the cover plate body 1, forming blind holes. Their function is to balance the gas pressure inside and outside the contact area between the airbag and the secondary radial support sleeve 3, prevent the airbag from being locally trapped, ensure its flexible deformation, divide the originally integral support sleeve into multiple elastic support ribs, improve the stress distribution of the structure, avoid stress concentration, and thus significantly improve the fatigue life of the parts. The design of the circular holes further eliminates the risk of stress concentration caused by the sharp corners of the groove bottom.

[0026] Furthermore, an annular sealing groove 6 is provided on the lower surface of the cover plate body 1, located outside the primary radial support ring 2. The cross-section of this sealing groove 6 is preferably trapezoidal. Its function is to install an O-ring (not shown in the figure). When the cover plate is assembled with the piston or upper cover of the air spring, the O-ring is compressed at this point, forming a reliable main sealing barrier to ensure the airtightness of the entire air spring system.

[0027] Furthermore, the edge of the cover plate body 1 is provided with multiple mounting bolt holes 7. These bolt holes are used to pass bolts through, so that the entire cover plate is securely mounted on the corresponding component of the air spring.

[0028] Furthermore, a rubber limiting block 8 is provided at the center of the lower surface of the cover plate body 1. This limiting block 8 is coaxially arranged with the secondary radial support sleeve 3. Its function is that when the air spring is compressed to its limit position, this limiting block 8 will contact other components before the airbag, playing a role in buffering and mechanical limiting, preventing the airbag from being damaged by excessive compression.

[0029] In practical use: the airbag is clamped from the inner and outer sides by the primary radial support ring 2 and the secondary radial support sleeve 3 to provide main support. The pressure relief through hole 5 on the support sleeve can balance the air pressure and improve the stress distribution. The elastic buffer layer 4 ensures flexible clamping and sealing, while the O-ring in the outer sealing groove 6 forms the main sealing defense line. Combined with the mounting bolt hole 7, the whole is fixed. The rubber limit block 8 in the center provides buffer protection during extreme compression. Together, they achieve strong support, long service life and high reliability.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "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.

[0031] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air spring cover with radial support force, comprising a cover body (1), wherein the cover body (1) is a disc-shaped structure, characterized in that: The lower surface of the cover plate body (1) is integrally formed with a primary radial support ring (2) and a secondary radial support sleeve (3) arranged coaxially. The primary radial support ring (2) is an annular protrusion with an annular groove (9) on its inner wall. An elastic buffer layer (4) is fixedly installed in the groove (9) by vulcanization. The secondary radial support sleeve (3) is located radially inside the primary radial support ring (2) and its height is higher than that of the primary radial support ring (2). The wall of the secondary radial support sleeve (3) is provided with multiple pressure-reducing through holes (5) evenly distributed along its circumference. The pressure-reducing through holes (5) are circular holes that axially penetrate the upper and lower end faces of the secondary radial support sleeve (3) and extend upward to the interior of the cover plate body (1) to form a blind hole. The lower surface of the cover plate body (1) is provided with an annular sealing groove (6) outside the primary radial support ring (2). The edge of the cover plate body (1) is provided with mounting bolt holes (7), and a rubber limiting block (8) is provided at its center.

2. The air spring cover plate with radial support force according to claim 1, characterized in that: The outer diameter of the primary radial support ring (2) is adapted to the upper outer ring of the air spring airbag, and the inner diameter of the secondary radial support sleeve (3) is adapted to the upper inner ring of the air spring airbag.

3. The air spring cover with radial support force according to claim 1, characterized in that: The elastic buffer layer (4) is made of rubber, and its inner surface is used to fit tightly against the outer ring of the air spring airbag.

4. The air spring cover plate with radial support force according to claim 1, characterized in that: The axis of the pressure relief through hole (5) is parallel to the axis of the secondary radial support sleeve (3).

5. The air spring cover plate with radial support force according to claim 1, characterized in that: The limiting block (8) is coaxially arranged with the secondary radial support sleeve (3).

6. The air spring cover with radial support force according to claim 1, characterized in that: The sealing groove (6) has a trapezoidal cross-section to accommodate the O-ring seal.

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