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 a damping assembly, a piston fixing assembly arranged on the outer side of the damping assembly and a sealing protection assembly. The piston fixing assembly comprises a piston, a piston base located at the bottom end of the piston and a piston patch arranged above the piston base, the sealing protection assembly comprises a sealing ring, and the sealing ring is located above the piston patch. According to the air spring assembly, due to the fact that the piston patch and the sealing ring are arranged, the good sealing effect is achieved while it is guaranteed that the piston is fixed, and the stability of the air spring is improved.

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] With the rapid development of China's new energy vehicle market, the importance of automotive chassis suspension systems is becoming increasingly prominent. Air springs, with their advantages of light weight, variable stiffness, and height adjustment, are widely used in automotive chassis suspension systems, effectively improving the comfort of passengers.

[0003] Currently, existing air spring assemblies typically involve the piston bottom sitting directly on the shock absorber piston base, with a gap between the upper part of the piston and the shock absorber, and the lower end of the dust cover directly mounted on the shock absorber piston base. To ensure proper assembly, a gap must be maintained between the piston and the piston base, relying solely on O-rings for compression. However, during the movement of the air spring, the piston will sway with the air spring's oscillation, making the air spring system unstable and shortening the lifespan of the O-rings.

[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 piston patches and sealing rings, ensures that the piston is fixed while achieving a good sealing effect, thereby improving 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: a shock absorption component, a piston fixing component disposed on the outside of the shock absorption component, and a sealing and protective component. The shock absorption component includes a shock absorber. The piston fixing component includes a piston, a piston base located at the bottom end of the piston, and a piston patch disposed above the piston base. The sealing and protective component includes a sealing ring, which is located above the piston patch.

[0007] Furthermore, the shock absorption assembly also includes a shock absorber cap located on the shock absorber, the shock absorber cap being generally cylindrical.

[0008] Furthermore, the bottom of the shock absorber cap is provided with a circular mounting opening, and the inner wall of the shock absorber cap is provided with a first protrusion, which is suitable for assembly with the shock absorber.

[0009] Furthermore, the outer side wall of the shock absorber cap is provided with a plurality of second longitudinal protrusions in the circumferential direction, the second longitudinal protrusions being adapted to be interference-fitted with the piston fixing assembly.

[0010] Furthermore, the piston is generally a hollow cylindrical structure, and the inner wall of the piston top matches the outer diameter of the shock absorber cap. Since the outer wall of the shock absorber cap is provided with multiple second longitudinal protrusions in the circumferential direction, the piston top can be interference-fitted onto the outer surface of the shock absorber cap.

[0011] Furthermore, the piston base is fixed to the shock absorber. The piston base is an annular flat plate, and a circular hole is provided in the center of the piston base. The central circular hole is used to pass through the shock absorber for fixation.

[0012] Furthermore, the piston patch has an annular structure, and the inner wall of the piston patch is provided with regularly arranged longitudinal protrusions, which are fixedly attached to the outer side of the shock absorber.

[0013] Furthermore, the lower inner wall of the piston is provided with a mating surface that cooperates with the piston patch, so that the piston patch is mated and fixed to the piston, and the piston patch is pressed onto the piston base, forming a rigid connection between the piston patch and the piston base.

[0014] Furthermore, the sealing ring is an O-ring elastic sealing ring, which is sleeved between the outer wall of the shock absorber and the inner wall of the piston, and the sealing ring is located above the piston patch.

[0015] Furthermore, the sealing and protective assembly also includes a dust cover, which adopts a flexible corrugated tube structure, and the bottom end of the dust cover is press-fitted and fixed between the piston and the piston base.

[0016] The beneficial effects of this utility model are as follows: The air spring assembly of this utility model includes a shock-absorbing component, a piston fixing component disposed outside the shock-absorbing component, and a sealing and protective component. The shock-absorbing component includes a shock absorber. The piston fixing component includes a piston, a piston base located at the bottom end of the piston, and a piston patch disposed above the piston base. The sealing and protective component includes a sealing ring located above the piston patch. By fixing the lower end of the piston to the piston base and the piston patch, the air spring assembly of this utility model ensures good sealing while maintaining piston fixation. This guarantees piston stability and, consequently, the stability of the entire air spring. It also prevents abnormal noise and damage to the shock absorber caused by relative movement between the piston and the shock absorber, thereby extending the service life of the air spring. Attached Figure Description

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

[0018] Figure 1This 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 shock absorber cap of this utility model.

[0022] The component names and their numbers in the diagram are as follows:

[0023] Air spring assembly 100;

[0024] Shock absorber assembly 1, shock absorber 11, shock absorber cap 12, mounting port 121, first protrusion 122, second longitudinal protrusion 123;

[0025] Piston fixing assembly 2, piston 21, piston base 22, piston patch 23;

[0026] Sealing and protection component 3, sealing ring 31, dust cover 32. Detailed Implementation

[0027] 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.

[0028] like Figure 1-3 As shown, this embodiment provides an air spring assembly 100, including a shock-absorbing component 1, a piston fixing component 2 disposed on the outside of the shock-absorbing component 1, and a sealing and protective component 3.

[0029] In some embodiments, the shock-absorbing assembly 1 includes a shock absorber 11 and a shock absorber cap 12 located on the shock absorber 11. The shock absorber 11 is generally cylindrical in shape and includes a cylinder with a larger outer diameter and a piston rod with a smaller diameter extending from the top of the cylinder. The cylinder typically contains a damping medium, and the piston rod can reciprocate within the cylinder. The piston rod and the cylinder cooperate to form a damping structure. The shock absorber 11 absorbs and dissipates vibration energy through an internal damping mechanism, reducing the impact on objects, such as mitigating bumps caused by uneven road surfaces in a car and improving ride comfort; it also suppresses the reciprocating swaying of objects, making movement smoother and reducing component displacement or loosening caused by vibration. Figure 4 As shown, the shock absorber cap 12 is fitted onto the shock absorber 11. The shock absorber cap 12 is generally cylindrical. A circular mounting opening 121 is provided at the bottom of the shock absorber cap 12. The circular mounting opening 121 is suitable for passing through the piston rod on the shock absorber 11. A first protrusion 122 is provided on the inner wall of the shock absorber cap 12, which is suitable for assembly with the shock absorber 11. A plurality of second longitudinal protrusions 123 are provided circumferentially on the outer wall of the shock absorber cap 12. The second longitudinal protrusions 123 are suitable for interference fit with the piston fixing assembly 2.

[0030] In some embodiments, the piston fixing assembly 2 includes a piston 21, a piston base 22 located at the bottom end of the piston 21, and a piston patch 23 disposed above the piston base 22. The piston 21 is generally a hollow columnar structure. The inner wall of the top end of the piston 21 matches the outer diameter of the shock absorber cap 12. Since the outer wall of the shock absorber cap 12 is provided with multiple second longitudinal protrusions 123 circumferentially, the top end of the piston 21 can be interference-fitted onto the outer surface of the shock absorber cap 12, thereby ensuring that the upper end of the piston 21 is tightly fixed to the shock absorber 11. The piston base 22 is fixed to the shock absorber 11. The piston base 22 is an annular flat plate, and a circular hole is opened in the center of the piston base 22 for passing through the shock absorber 11 for fixing. The piston base 22 serves as a basic support component, and the piston 21 and piston patch 23 are disposed above the piston base 22, providing a stable mounting base for the piston 21 and piston patch 23. The piston patch 23 has a ring-shaped structure, and its inner wall has regularly arranged longitudinal protrusions. These longitudinal protrusions on the inner wall of the piston patch 23 are fixedly attached to the outer surface of the shock absorber 11. The lower inner wall of the piston 21 has a mating surface that mates with the piston patch 23, allowing the piston patch 23 to be fixedly attached to the piston 21. The piston patch 23 is pressed onto the piston base 22, forming a rigid connection between the piston patch 23 and the piston base 22. The lower end of the piston 21 is in close contact with the piston patch 23, forming a rigid connection after compression, which restricts the radial displacement of the piston 21. When the piston 21 moves up and down, the fixed design of the piston patch 23 and the piston base 22 can absorb vibration energy and reduce impact.

[0031] In some embodiments, the sealing and protective assembly 3 includes a sealing ring 31 and a dust cover 32. The sealing ring 31 is an O-ring elastic sealing ring, which is sleeved between the outer side of the shock absorber 11 and the inner wall of the lower end of the piston 21, and is located above the piston patch 23. Since the inner wall of the lower end of the piston 21 directly presses the sealing ring 31, the cross-section of the sealing ring 31 deforms into an elliptical shape after compression, forming a sealing contact surface. The sealing ring 31 is located above the piston patch 23, and the two together bear the pressure of the piston 22. The rigid support of the piston patch 23 disperses local stress and prevents the sealing ring 31 from failing due to excessive compression. The dust cover 32 adopts a flexible corrugated tube structure. The bottom end of the dust cover 32 is fixed by the pressing process between the piston 21 and the piston base 22. During installation, the dust cover 32 is first laid flat on the surface of the piston base 22, and then the piston 21 is pressed onto the piston base 22. The rigid clamping action between the piston 21 and the piston base 22 firmly fixes the edge of the dust cover 32. The corrugated structure of the dust cover 32 allows for vertical movement and extension, covering the exposed parts of the shock absorber 11 and piston 21, and preventing the intrusion of pollutants such as dust and moisture.

[0032] The air spring assembly 100 of this utility model includes a shock-absorbing component 1, a piston fixing component 2 disposed outside the shock-absorbing component 1, and a sealing and protective component 3. The shock-absorbing component 1 includes a shock absorber 11 and a shock absorber cap 12 located on the shock absorber 11. The piston fixing component 2 includes a piston 21, a piston base 22 located at the bottom end of the piston 21, and a piston patch 23 disposed above the piston base 22. The sealing and protective component 3 includes a sealing ring 31 and a dust cover 32. By fixing the lower end of the piston 21 to the piston base 22 and the piston patch 23, the piston patch 23 and the sealing ring 31 are simultaneously subjected to force to press the piston 21 in opposite directions, ensuring the piston... The lower end of piston 21 is fixed to achieve a good sealing effect. Since the upper end of piston 21 and shock absorber cap 12 are fitted with an interference fit, the upper end of piston 21 is fixed. By fixing both ends, the stability of piston 21 is ensured, which in turn ensures the stability of the entire air spring. At the same time, it solves the problem of abnormal noise and damage to shock absorber 11 after relative movement between piston 21 and shock absorber 11, thereby improving the service life of air spring. Since the lower end of dust cover 32 is placed directly on the lower end of piston 21, the lower end of dust cover 31 is fixed directly when installing piston 21, which can optimize the assembly process, improve production efficiency, and reduce costs.

[0033] 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.

[0034] 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, include: The shock absorption assembly includes a piston fixing assembly disposed on the outside of the shock absorption assembly and a sealing and protective assembly. The shock absorption assembly includes a shock absorber. The piston fixing assembly includes a piston, a piston base located at the bottom end of the piston, and a piston patch disposed above the piston base. The sealing and protective assembly includes a sealing ring located above the piston patch.

2. The air spring assembly according to claim 1, characterized in that, The shock absorption assembly also includes a shock absorber cap located on the shock absorber, the shock absorber cap being generally cylindrical.

3. The air spring assembly according to claim 2, characterized in that, The bottom of the shock absorber cap has a circular mounting opening, and the inner wall of the shock absorber cap has a first protrusion, which is suitable for assembly with the shock absorber.

4. The air spring assembly according to claim 2, characterized in that, The outer side wall of the shock absorber cap is provided with a plurality of second longitudinal protrusions in the circumferential direction, and the second longitudinal protrusions are adapted to be interference-fitted with the piston fixing assembly.

5. The air spring assembly according to claim 2, characterized in that, The piston is generally a hollow cylindrical structure. The inner wall of the piston top matches the outer diameter of the shock absorber cap. Since the outer wall of the shock absorber cap has multiple second longitudinal protrusions circumferentially arranged, the piston top can be interference-fitted onto the outer surface of the shock absorber cap.

6. The air spring assembly according to claim 1, characterized in that, The piston base is fixed to the shock absorber. The piston base is an annular flat plate, and a circular hole is opened in the center of the piston base. The central circular hole is used to pass through the shock absorber for fixation.

7. The air spring assembly according to claim 1, characterized in that, The piston patch has a ring-shaped structure, and the inner wall of the piston patch has regularly arranged longitudinal protrusions. The longitudinal protrusions on the inner wall of the piston patch are attached and fixed to the outer side of the shock absorber.

8. The air spring assembly according to claim 1, characterized in that, The piston has a mating surface on the inner side wall of its lower end that mates with the piston patch, so that the piston patch is mated and fixed to the piston, and the piston patch is pressed onto the piston base, forming a rigid connection between the piston patch and the piston base.

9. The air spring assembly according to claim 1, characterized in that, The sealing ring is an O-ring elastic sealing ring, which is sleeved between the outer wall of the shock absorber and the inner wall of the piston, and the sealing ring is located above the piston patch.

10. The air spring assembly according to claim 1, characterized in that, The sealing and protective assembly also includes a dust cover, which adopts a flexible corrugated tube structure, and the bottom end of the dust cover is press-fitted and fixed between the piston and the piston base.

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