Air spring assembly

Abstract

The utility model belongs to the technical field of air springs, and particularly relates to an air spring assembly which comprises an upper top seat, a shock absorber piston rod penetrating through the upper top seat, a fixing assembly arranged on the shock absorber piston rod and a sealing assembly. The fixing assembly comprises top rubber installed on the shock absorber piston rod in a sleeving mode and a locking nut fixed to the shock absorber piston rod, the sealing assembly comprises a sealing cover arranged above the shock absorber piston rod in a covering mode, and the top rubber is a rubber part without an outer framework. According to the air spring assembly, the top rubber and the locking nut are matched with the sealing cover, so that the top rubber is prevented from moving, meanwhile, the sealing effect of a system is improved, and the stability of the air spring is enhanced.

Description

Technical Field

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

[0002] As a key component of the chassis system, air springs are increasingly widely used in the field of new energy vehicles due to their advantages such as height adjustability and comfort optimization. The sealing structure of air springs directly affects their performance, service life, and the stability of the entire air suspension system.

[0003] Currently, existing air spring assemblies typically employ a metal sealing cap and a double-frame top mount design, requiring a complex crimping process and O-ring engagement to achieve a seal. The double-frame structure of the top mount leads to complex manufacturing processes, high mold costs, and a high risk of seal failure due to improper crimping during assembly. Furthermore, in traditional structures, the top mount is prone to vertical movement during air spring operation, generating abnormal noise and reducing its lifespan, ultimately affecting the overall stability of the air spring system.

[0004] Therefore, it is necessary to provide a new air spring assembly. Utility Model Content

[0005] In view of this, the present invention provides an air spring assembly that, by setting a top rubber, a locking nut and a sealing cap to cooperate, prevents the top rubber from shifting, improves the sealing effect of the system and enhances the stability of the air spring.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to provide an air spring assembly, including: an upper top seat, a shock absorber piston rod placed through the upper top seat, a fixing component and a sealing component disposed on the shock absorber piston rod, the fixing component including a top rubber sleeved and installed on the shock absorber piston rod and a locking nut fixed on the shock absorber piston rod, and the sealing component including a sealing cover covering the shock absorber piston rod.

[0007] Furthermore, a through mounting hole is provided in the center of the upper top seat, through which the shock absorber piston rod is placed.

[0008] Furthermore, the upper top seat is provided with a mounting groove, the mounting hole is located in the center of the mounting groove, and the mounting groove is stepped.

[0009] Furthermore, the top adhesive is a rubber component without an outer skeleton, and a through hole is provided in the middle of the top adhesive. The diameter of the through hole matches the diameter of the shock absorber piston rod, and the top adhesive is adapted to allow the shock absorber piston rod to pass through and be placed through the through hole.

[0010] Furthermore, the outer shape of the top adhesive matches the inner wall of the mounting groove on the upper top seat, and the bottom surface of the top adhesive abuts against the bottom of the mounting groove of the upper top seat.

[0011] Furthermore, the locking nut is fixed above the top rubber, and an external thread is provided on the top of the shock absorber piston rod. The locking nut engages with the external thread on the top of the shock absorber piston rod, and the locking nut presses the top rubber along the axial direction of the shock absorber piston rod.

[0012] Furthermore, the sealing assembly also includes a sealing ring and a wire retaining ring disposed on the sealing cover.

[0013] Furthermore, the sealing cap is generally cap-shaped, and an annular groove is provided on the side wall of the sealing cap, the annular groove being suitable for installing a sealing ring.

[0014] Furthermore, the sealing cap is made of high-strength plastic or plastic-coated metal.

[0015] Furthermore, the wire retaining ring is an annular elastic metal part, and a retaining ring groove is also provided on the side wall of the mounting groove of the upper top seat. The outer diameter of the wire retaining ring is slightly larger than the inner diameter of the retaining ring groove of the upper top seat. The wire retaining ring is pressed into the retaining ring groove by the equipment, and the sealing cover is fixed in the mounting groove of the upper top seat by axially pressing the sealing cover with the wire retaining ring.

[0016] The beneficial effects of this utility model are as follows: The air spring assembly of this utility model includes an upper top seat, a shock absorber piston rod placed through the upper top seat, a fixing component and a sealing component mounted on the shock absorber piston rod. The fixing component includes a top adhesive sleeved and installed on the shock absorber piston rod and a locking nut fixed on the shock absorber piston rod. The sealing component includes a sealing cover covering the shock absorber piston rod. The upper top seat of the air spring assembly of this utility model serves as a support carrier for the entire sealing structure and is used to install the fixing component and the sealing component. The locking nut presses the top adhesive along the axial direction of the shock absorber piston rod, fixing the top adhesive to the shock absorber piston rod and preventing the top adhesive from moving axially along the shock absorber piston rod, thus ensuring the connection stability between the top adhesive and the shock absorber piston rod. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural schematic diagram of the air spring assembly of this utility model;

[0019] Figure 2 This is an exploded view of the air spring assembly of this utility model;

[0020] Figure 3 This is a cross-sectional view of the air spring assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the upper top seat of this utility model;

[0022] Figure 5 This is a schematic diagram of the top adhesive of this utility model.

[0023] The component names and their numbers in the diagram are as follows:

[0024] Air spring assembly 100;

[0025] Top seat 1, mounting hole 11, mounting groove 12, retaining ring groove 121;

[0026] Shock absorber piston rod 2;

[0027] Fixing component 3, top adhesive 31, through hole 311, locking nut 32;

[0028] Sealing assembly 4, sealing cap 41, annular groove 411, sealing ring 42, wire retaining ring 43. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the utility model, and therefore only shows the components relevant to the utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] like Figure 1-3 As shown, this embodiment provides an air spring assembly 100, including an upper top seat 1, a shock absorber piston rod 2 placed through the upper top seat 1, a fixing component 3 disposed on the shock absorber piston rod 2, and a sealing component 4.

[0031] In some of these embodiments, such as Figure 4 As shown, a through mounting hole 11 is provided in the center of the upper top seat 1, through which the shock absorber piston rod 2 is placed. A mounting groove 12 is provided on the upper top seat 1, with the mounting hole 11 located in the center of the mounting groove 12. The mounting groove 12 is stepped, suitable for placing the fixing component 3 and the sealing component 4. The upper top seat 1 serves as the supporting carrier of the entire sealing structure, used to install the fixing component 3 and the sealing component 4; the stepped structure of the mounting groove 12 defines the position of the fixing component 3 and the sealing component 4, while bearing external loads and transmitting them to the air spring body.

[0032] In some embodiments, the shock absorber piston rod 2 has a rod-shaped structure and is axially inserted through the mounting hole 11 of the upper seat 1. An external thread is provided at the top of the shock absorber piston rod 2 for engagement with the fixing structure 3. The shock absorber piston rod 2, as the core force-bearing component of the entire air spring, is used to transmit the axial load of the shock absorber.

[0033] In some embodiments, the fixing assembly 3 includes a top adhesive 31 sleeved on the shock absorber piston rod 2 and a locking nut 32 fixed on the shock absorber piston rod 2. Figure 5 As shown, the top mount 31 is a rubber component without an outer frame. A through hole 311 is provided in the center of the top mount 31, the diameter of which matches the diameter of the shock absorber piston rod 2. The top mount 31 is suitable for the shock absorber piston rod 2 to pass through the through hole 311. The external shape of the top mount 31 matches the inner wall of the mounting groove 12 on the upper top seat 1, and the bottom surface of the top mount 31 abuts against the bottom of the mounting groove 12 of the upper top seat 1. The top mount 31 is fitted onto the shock absorber piston rod 2 and located within the mounting groove 12 of the upper top seat 1, providing not only cushioning and vibration damping functions to absorb vibrations during vehicle operation, but also assisting in sealing. A locking nut 32 is fixed above the top rubber 31. The locking nut 32 has an internal thread, which mates with the external thread on the top of the shock absorber piston rod 2. The locking nut 32 presses the top rubber 31 axially along the shock absorber piston rod 2, fixing the top rubber 31 to the shock absorber piston rod 2 and preventing the top rubber 31 from moving axially along the shock absorber piston rod 2, thus ensuring the stability of the connection between the top rubber 31 and the shock absorber piston rod 2. By setting the top rubber 31 and the locking nut 32, the installation process is simplified. The top rubber 31 is directly placed in the mounting groove 12 of the upper top seat 1, avoiding movement.

[0034] In some embodiments, the sealing assembly 4 includes a sealing cap 41 covering the shock absorber piston rod 2, a sealing ring 42 disposed on the sealing cap 41, and a wire retaining ring 43. The sealing cap 41 is generally cap-shaped, with an annular groove 411 formed on its side wall, which is suitable for installing the sealing ring 42. The bottom surface of the sealing cap 41 abuts against the top adhesive 31. The sealing cap 41 is made of high-strength plastic or plastic-coated metal, which is lightweight and low-cost. The sealing cap 41 is used to further compress the top adhesive 31 and restrict the vertical position of the top adhesive 31. By providing the annular groove 411 to accommodate the sealing ring 42, the outer side wall of the sealing cap 41 cooperates with the inner wall of the mounting groove 12 of the upper top seat 1 to compress the sealing ring 42, thereby achieving a sealing function. The sealing ring 42 is a circular rubber sealing ring, placed in the annular groove 411 on the side wall of the sealing cover 41. When the sealing cover 41 is installed on the upper top seat 1, the sealing ring 41 is pressed by the annular groove 411 on the sealing cover 41 against the inner wall of the mounting groove 12 of the upper top seat 1, forming an annular sealing surface. This prevents external dust and moisture from entering the air spring and also prevents internal gas leakage, ensuring sealing performance. The wire retaining ring 43 is an annular elastic metal part. A retaining ring groove 121 is also provided on the side wall of the mounting groove 12 of the upper top seat 1. The outer diameter of the wire retaining ring 43 is slightly larger than the inner diameter of the retaining ring groove 121 of the upper top seat 1. The wire retaining ring 43 is pressed into the retaining ring groove 121 by the equipment. By axially pressing the sealing cover 41 with the wire retaining ring 43, the sealing cover 41 is fixed in the mounting groove 12 of the upper top seat 1, preventing the sealing cover 41 from falling off, thereby ensuring the assembly stability of the entire sealing structure.

[0035] In this embodiment, the top rubber 31 of the air spring assembly 100 passes through the damper piston rod 2 and is axially pressed along the damper piston rod 2 by the locking nut 32, thus fixing the top rubber 31 to the damper piston rod 2. The top rubber 31 is embedded in the mounting groove 12 of the upper top seat 1, with the bottom surface of the top rubber 31 fitting against the bottom of the mounting groove 12 and the side wall of the top rubber 31 contacting the groove wall of the mounting groove 12, achieving circumferential positioning. The sealing cover 41 is placed above the top rubber 31, with the bottom surface of the sealing cover 41 pressing against the top surface of the top rubber 31. The sealing ring 42 at the edge is embedded in the annular groove 411 of the sealing cover 41, while the outer side of the sealing ring 42 contacts the groove wall of the mounting groove 12 of the upper top seat 1. The steel wire retaining ring 43 is pressed into the retaining ring groove 121 of the upper top seat 1 by the equipment, axially pressing the top of the sealing cover 41 and fixing the sealing cover 41 to the upper top seat 1. The sealing ring 42 undergoes elastic deformation under the pressure of the sealing cover 41 and the side wall of the mounting groove 12 of the upper top seat 1, forming a sealing interface to prevent gas or liquid leakage. The top rubber 31 acts as a buffer layer, absorbing the vibration load transmitted by the shock absorber piston rod 2, while reducing assembly gaps through its skeletonless design to avoid lateral movement and abnormal noise. The threaded connection between the locking nut 32 and the shock absorber piston rod 2 ensures the initial preload of the top rubber, and the elastic snap-fit ​​of the wire retaining ring 43 ensures the long-term fixation of the sealing cover 41.

[0036] In this embodiment, the air spring assembly 100 is assembled as follows: the shock absorber piston rod 2 is placed through the mounting hole of the upper top seat 1, the top rubber 31 is placed through the shock absorber piston rod 2, and fixed with the lock nut 32; at this time, the assembled top rubber 31 is placed in the mounting groove 12 of the upper top seat 1; the sealing ring 42 is installed in the annular groove 411 of the sealing cover 41; the sealing cover 42 is pressed on the top rubber 31, and the sealing ring 42 contacts the inner wall of the mounting groove 12 of the upper top seat 1; the wire retaining ring 43 is pressed into the retaining ring groove 121 at the top of the upper top seat 1, thereby completing the overall assembly.

[0037] The air spring assembly 100 of this utility model includes an upper top seat 1, a shock absorber piston rod 2 placed through the upper top seat 1, a fixing component 3 and a sealing component 4 mounted on the shock absorber piston rod 2. The upper top seat 1 has a through mounting hole 11 in the center, which is suitable for the shock absorber piston rod 2 to pass through. The upper top seat 1 has a mounting groove 12, with the mounting hole 11 located in the center of the mounting groove 12. The mounting groove 12 is stepped and suitable for placing the fixing component 3 and the sealing component 4. The fixing component 3 includes a top rubber 31 sleeved on the shock absorber piston rod 2 and a locking nut 32 fixed on the shock absorber piston rod 2. The sealing component 4 includes a sealing cover 41 covering the shock absorber piston rod 2, a sealing ring 42 mounted on the sealing cover 41, and a steel wire retaining ring 43. The upper top seat 1 of this utility model serves as the support carrier for the entire sealing structure, and is used to install the fixing component 3 and the sealing component 4. The locking nut 32 presses the top rubber 31 axially along the shock absorber piston rod 2, fixing the top rubber 31 to the shock absorber piston rod 2, preventing the top rubber 31 from moving axially along the shock absorber piston rod 2, and ensuring the connection stability between the top rubber 31 and the shock absorber piston rod 2. When the sealing cover 41 is installed on the upper top seat 1, the sealing ring 41 is squeezed by the annular groove 411 on the sealing cover 41 and the inner wall of the mounting groove 12 of the upper top seat 1 to form an annular sealing surface, thereby preventing external dust and moisture from entering the air spring, while preventing internal gas leakage and ensuring sealing performance. The sealing cover 41 is axially pressed by the steel wire retaining ring 43, fixing the sealing cover 41 in the mounting groove 12 of the upper top seat 1, preventing the sealing cover 41 from falling off, and thus ensuring the assembly stability of the entire sealing structure.

[0038] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An air spring assembly, characterized in that, The application relates to a shock absorber piston rod fixing assembly and sealing assembly. The upper top base is provided with a through installation hole in the center, and the shock absorber piston rod is arranged through the installation hole.

2. The air spring assembly of claim 1, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

3. The air spring assembly of claim 2, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

4. The air spring assembly of claim 1, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

5. The air spring assembly of claim 3, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

6. The air spring assembly of claim 1, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

7. The air spring assembly of claim 3, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

8. The air spring assembly of claim 7, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

9. The air spring assembly of claim 1, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove.

10. The air spring assembly of claim 7, wherein, The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove. The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove. The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove. The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove. The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove. The upper top base is provided with an installation groove, and the installation hole is arranged in the center of the installation groove. 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