Air spring integrated with damping-adjustable shock absorber

Abstract

The utility model relates to the field of air springs of automobile shock absorbers, and discloses an air spring of an integrated damping-adjustable shock absorber. Comprising a shock absorber body which is provided with a base and an end cover far away from the base; an air bag is arranged between the piston and the end cover, and the air bag is buckled on the piston and the end cover by utilizing the air pressure acting force generated in the air spring. The reliability of the sealing structure is remarkably improved by improving the assembly precision and reducing the local stress concentration of the sealing surface, so that the durability and the air tightness of the air spring are enhanced, and the overall performance is improved. Moreover, the complexity caused by multi-layer sealing is reduced, the process complexity and the manufacturing cost can be reduced, and the market competitiveness of the product is improved.

Description

Technical Field

[0001] This utility model relates to the field of air springs for automotive shock absorbers, specifically to an air spring with an integrated adjustable damping shock absorber. Background Technology

[0002] In vehicle suspension systems, air springs, as a key elastic element, are widely used in commercial vehicles, passenger vehicles, and high-end new energy vehicles due to their adjustable stiffness and excellent vibration damping performance. The core function of an air spring is to absorb road impacts through the elastic deformation of internal compressed air, and the reliability of the sealing structure directly determines the durability, airtightness, and overall performance of the air spring. However, existing air spring sealing structures still have several defects, severely limiting their practical application and service life. Insufficient assembly precision between components and the airbag or end cap in existing sealing structures can easily lead to localized stress concentration on the sealing surface, causing damage. Furthermore, while multi-layered sealing structures using a main seal and a dust seal can improve short-term sealing performance, they increase process complexity and manufacturing costs. Summary of the Invention

[0003] The purpose of this invention is to provide an air spring with an integrated adjustable damping shock absorber to address the aforementioned shortcomings in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An air spring with an integrated damping adjustable shock absorber, comprising:

[0006] The shock absorber body has a base and an end cap away from the base;

[0007] A piston is engaged with the base, and an air bladder is provided between the piston and the end cap. The air pressure generated inside the air spring is used to press the air bladder onto both.

[0008] In a preferred embodiment of this utility model, the piston comprises:

[0009] The cylindrical body includes a first fitting part sleeved on the base and an inwardly recessed second fitting part;

[0010] An extension is provided on the cylinder.

[0011] As a preferred embodiment of the present invention, the first mating part is a circular tube hole protruding from the cylinder body, and protrusions distributed in a ring at intervals are provided at the opening edge inside the circular tube hole.

[0012] The second mating part is composed of an inclined end face and a boss. The two ends of the inclined end face are respectively connected to the cylinder and the boss, and the connection is rounded. One end of the boss is provided with a first chamfer edge and a first body that tapers inward. The two together form a first hook-shaped end.

[0013] The extension is a cylindrical structure and is centered on the circular tube hole.

[0014] As a preferred embodiment of this utility model, the end cap includes:

[0015] A cover body, a T-shaped platform disposed on the cover body, the T-shaped platform having a first through hole, and at least two grooves provided on the wall of the hole;

[0016] The cover is provided with an annular platform, and there is a space between the annular platform and the T-shaped platform. One end of the annular platform is provided with a second chamfered edge, and a second platform body is tapered inward, the two forming a second hook-shaped end.

[0017] The cover is also provided with a second through hole.

[0018] As a preferred embodiment of this utility model, one end of the airbag abuts against the first hook-shaped end, and its skin is attached to the protrusion, the inclined end face and the cylinder.

[0019] In a preferred embodiment of this utility model, one end of the airbag abuts against the second hook-shaped end, and its skin is attached to one end face of the cover.

[0020] As a preferred embodiment of this utility model, the base is provided with two semi-circular grooves and a rectangular groove, the circular tube hole extends into the base, and the protrusion engages with the semi-circular groove, and a first sealing ring is provided in the rectangular groove.

[0021] As a preferred embodiment of this utility model, the shock absorber body is provided with a buffer seat and a screw. One end of the screw extends into the first through hole and passes through the cover. A second sealing ring that mates with the groove is sleeved on the screw. A lifting ring is threaded onto the screw.

[0022] As a preferred embodiment of this utility model, a rubber bushing is provided inside the lifting ring.

[0023] As a preferred embodiment of this utility model, a buffer block that hooks onto the T-shaped platform is sleeved on the screw.

[0024] This invention offers the following advantages: by improving assembly precision and reducing local stress concentration on the sealing surface, the reliability of the sealing structure is significantly enhanced, thereby increasing the durability and airtightness of the air spring and improving its overall performance. Furthermore, reducing the complexity caused by multi-layer sealing reduces process complexity and manufacturing costs, thus improving the product's market competitiveness. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the external structure of the air spring of the shock absorber of this utility model.

[0027] Figure 2 This is a cross-sectional view of the air spring structure of the shock absorber of this utility model.

[0028] Figure 3 This is an enlarged structural schematic diagram of the present invention.

[0029] Figure 4 This is a cross-sectional view of the piston structure of this utility model.

[0030] Figure 5 This is a schematic diagram of the end cap structure of this utility model.

[0031] Figure 6 This is a schematic diagram of the piston and base engagement structure of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Shock absorber body; 11. Buffer lower seat; 12. Screw; 13. Buffer block; 14. Second sealing ring; 2. Piston; 21. Cylinder; 22. First mating part; 221. Circular tube hole; 222. Protrusion; 23. Second mating part; 231. Inclined end face; 232. Boss; 2321. First hook-shaped end; 2321a. First platform; 2321b. First chamfered edge; 24. Extension; 3. Airbag 31. Bag skin; 32. First hook block; 33. Second hook block; 4. End cap; 41. Cap body; 42. T-shaped platform; 421. First through hole; 422. Groove; 43. Annular platform; 431. Second hook-shaped end; 431a. Second chamfered edge; 431b. Second platform body; 44. Second through hole; 5. Lifting ring; 51. Rubber bushing; 6. Base; 61. Semi-circular groove; 62. Rectangular groove; 63. First sealing ring. Detailed Implementation

[0034] 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.

[0035] See Figures 1 to 6 As shown, this utility model provides an air spring with an integrated adjustable damping shock absorber. The shock absorber is an externally mounted adjustable damping shock absorber, and a damping adjustable solenoid valve is directly integrated into the shock absorber to control its damping. The solenoid valve is controlled by an electrical signal, enabling rapid response to external commands and precise damping adjustment. The air spring contains a sealed air chamber 3. When the vehicle encounters an impact caused by uneven road surfaces during driving, the air inside the air chamber 3 is compressed, reducing its volume and absorbing the impact energy. The combination of the shock absorber and the air spring constitutes a composite suspension system, and through their coordinated operation, a more efficient damping effect can be achieved, improving vehicle comfort. The principles of both are existing technology and will not be elaborated upon here.

[0036] Specifically, it includes: a vibration damper body 1, on which a base 6 is provided. The base 6 is provided with two semi-circular grooves 61 and a rectangular groove 62. The base 6 is connected to the vibration damper body 1 by welding or other fixing methods. An end cap 4 is provided at a distance away from the base 6. The above-mentioned fixing method of the base 6 and the end cap 4 is tight and reliable, the overall structure is compact, saves space, and improves the stability of the overall structure.

[0037] A piston 2 is engaged on the base 6, and an airbag 3 is provided between the piston 2 and the end cap 4. The air pressure generated inside the air spring is used to press the airbag 3 onto the two.

[0038] By using the double-end clamping of the airbag 3 and the uniform application of air pressure, the contact stress distribution between the piston 2 and the end cap 4 is more reasonable, avoiding localized wear and improving sealing performance. Furthermore, the piston 2 and airbag 3 can be replaced independently, resulting in low maintenance costs. This also reduces the complexity of multi-layer seals, lowering process complexity and manufacturing costs.

[0039] Specifically, the piston 2 includes a cylinder 21, which includes a first mating part 22 sleeved on the base 6 and an inwardly recessed second mating part 23, and the cylinder 21 is also provided with an extension part 24.

[0040] See Figure 4As shown, the first mating part 22 is a circular tube hole 221 protruding from the cylinder 21. At the opening edge of the circular tube hole 221, there are spaced, annularly distributed protrusions 222. These protrusions 222 can be in one or more rows, depending on actual needs. Through multi-stage mating, the connection between the piston 2 and the base 6, and between the piston 2 and the airbag 3, becomes tighter and more stable. The circular tube hole 221 of the first mating part 22 extends into the base 6, and the protrusions 222 engage with the semi-circular groove 61, effectively increasing the contact area and friction with the base 6, preventing loosening.

[0041] The second mating part 23 is composed of an inclined end face 231 and a boss 232. The two ends of the inclined end face 231 are connected to the cylinder 21 and the boss 232 respectively, and the connection is rounded. One end of the boss 232 is provided with a first chamfered edge 2321b, and a first body 2321a tapers inward, together forming a first hook-shaped end 2321. The aforementioned inclined end face 231 and rounded corner design can reduce stress concentration and improve the durability of the structure. During mechanical movement, it can effectively disperse stress and avoid fatigue damage caused by excessive local stress. The first hook-shaped end 2321 provides additional gripping force, ensuring that the piston 2 maintains a tight fit during movement.

[0042] The extension 24 has a cylindrical structure and is centered on the circular tube hole 221. This ensures the concentricity and stability of the piston 2 during movement. It can reduce the offset and wobbling of the piston 2 during movement, and improve the accuracy and reliability of the system.

[0043] In addition, a first sealing ring 63 is provided in the rectangular groove 62 of the base 6, which improves the sealing performance between the piston 2 and the base 6.

[0044] In addition, such as Figure 5 As shown, the end cap 4 includes: a cap body 41, and a T-shaped platform 42 disposed on the cap body 41. The T-shaped platform 42 has a first through hole 421, and at least two grooves 422 are provided on its hole wall. These grooves 422 can be used to install sealing elements, such as O-rings, to enhance sealing performance. This effectively prevents gas or liquid leakage and ensures the airtightness and liquid tightness of the structure.

[0045] The cover 41 is provided with an annular platform 43, with a space between the annular platform 43 and the T-shaped platform 42. One end of the annular platform 43 is provided with a second chamfered edge 431a, and a second platform body 431b is tapered inward, together forming a second hook-shaped end 431. This second hook-shaped end 431 can better fit tightly with the airbag 3, further enhancing the sealing effect. The aforementioned space can reduce stress concentration and improve the durability of the structure.

[0046] The cover 41 is also provided with a second through hole 44, which can be used to install components with auxiliary pressure relief and / or real-time pressure monitoring.

[0047] One end of the airbag 3 is a first hook block 32, which abuts against the first hook-shaped end 2321, ensuring a tight fit between the airbag 3, the piston 2, and the end cap 4. This tight fit effectively prevents gas leakage, thereby significantly improving the system's sealing performance. Furthermore, its bladder skin 31 is attached along the boss 232, the inclined end face 231, and the cylinder 21, further enhancing the sealing effect. Through this attachment method, the airbag 3 can be tightly bonded to surrounding components in different directions and angles, reducing the risk of leakage caused by changes in air pressure or mechanical vibration.

[0048] One end of the air bladder 3 is a second hook block 33, which abuts against the second hook-shaped end 431, and its skin 31 is attached to one end face of the cover 41. The same applies to the above.

[0049] The two hook-shaped ends provide stable support for the airbag 3. They not only withstand the internal air pressure of the airbag 3 but also maintain structural stability during mechanical movement. Furthermore, they facilitate the installation of the airbag 3, reducing alignment and adjustment time during assembly and improving assembly efficiency.

[0050] A buffer seat 11 and a screw 12 are provided on the damper body 1. One end of the screw 12 extends into the first through hole 421 and out of the cover 41. A second sealing ring 14 that mates with the groove 422 is fitted on the screw 12. A lifting ring 5 is threadedly connected to the screw 12, and a rubber bushing 51 is provided inside the lifting ring 5. The second sealing ring 14 fitted on the screw 12 and mates with the groove 422 can effectively prevent liquid or gas leakage and ensure the sealing of the damper's interior. The fact that one end of the screw 12 extends into the first through hole 421 and out of the cover 41 not only provides a stable connection, but also further enhances the structural stability through the threaded lifting ring 5.

[0051] Among them, the screw 12 is fitted with a buffer block 13 that hooks onto the T-shaped platform 42, which can play a buffering role when the shock absorber is subjected to a large impact, protect the internal parts of the shock absorber, and avoid damage caused by excessive compression or stretching.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air spring with an integrated adjustable damping shock absorber, characterized in that, include: The shock absorber body has a base and an end cap away from the base; A piston is engaged with the base, and an air bladder is provided between the piston and the end cap. The air pressure generated inside the air spring is used to press the air bladder onto both.

2. The air spring of the integrated damping adjustable shock absorber according to claim 1, characterized in that: The piston includes: The cylindrical body includes a first fitting part sleeved on the base and an inwardly recessed second fitting part; An extension is provided on the cylinder.

3. The air spring of the integrated damping adjustable shock absorber according to claim 2, characterized in that: The first mating part is a circular tube hole protruding from the cylinder body, and the opening edge inside the circular tube hole is provided with protrusions distributed in a ring at intervals; The second mating part is composed of an inclined end face and a boss. The two ends of the inclined end face are respectively connected to the cylinder and the boss, and the connection is rounded. One end of the boss is provided with a first chamfer edge and a first body that tapers inward. The two together form a first hook-shaped end. The extension is a cylindrical structure and is centered on the circular tube hole.

4. The air spring of the integrated damping adjustable shock absorber according to claim 1, characterized in that: The end cap includes: A cover body, a T-shaped platform disposed on the cover body, the T-shaped platform having a first through hole, and at least two grooves provided on the wall of the hole; The cover is provided with an annular platform, and there is a space between the annular platform and the T-shaped platform. One end of the annular platform is provided with a second chamfered edge, and a second platform body is tapered inward, the two forming a second hook-shaped end. The cover is also provided with a second through hole.

5. The air spring of the integrated damping adjustable shock absorber according to claim 3, characterized in that: One end of the airbag abuts against the first hook-shaped end, and its skin adheres to the protrusion, the inclined end face, and the cylinder.

6. The air spring of the integrated damping adjustable shock absorber according to claim 4, characterized in that: One end of the airbag abuts against the second hook-shaped end, and its skin adheres to one end face of the cover.

7. The air spring of the integrated damping adjustable shock absorber according to claim 3, characterized in that: The base is provided with two semi-circular grooves and a rectangular groove. The circular tube hole extends into the base, and the protrusion engages with the semi-circular groove. A first sealing ring is provided in the rectangular groove.

8. The air spring of the integrated damping adjustable shock absorber according to claim 4, characterized in that: The damper body is provided with a buffer seat and a screw. One end of the screw extends into the first through hole and out of the cover. A second sealing ring that mates with the groove is fitted on the screw. A lifting ring is threaded onto the screw.

9. The air spring of the integrated damping adjustable shock absorber according to claim 8, characterized in that: A rubber bushing is installed inside the lifting ring.

10. The air spring of the integrated damping adjustable shock absorber according to claim 8, characterized in that: A buffer block is fitted onto the screw and hooks onto the T-shaped platform.

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