An intermediate cylinder structure, shock absorber assembly, air spring assembly

Abstract

The utility model discloses an intermediate cylinder structure, shock absorber assembly, air spring assembly, including upper intermediate cylinder, lower intermediate cylinder and be located in the sealing element of upper intermediate cylinder and lower intermediate cylinder connecting end and present S type, be equipped with two recesss on the sealing element, recess all is equipped with sealing ring, one sealing ring is located the cooperation surface of upper intermediate cylinder and working cylinder, and another sealing ring is located the press -fitting cooperation area of upper intermediate cylinder and lower intermediate cylinder, in the utility model, through the setting of S type sealing element and sealing ring no.

Description

Technical Field

[0001] This utility model relates to the field of air spring technology, and more specifically to an intermediate cylinder structure, a shock absorber assembly, and an air spring assembly. Background Technology

[0002] As a core component of modern automotive suspension systems, electronically controlled shock absorbers utilize electronic control technology to achieve real-time adjustment of damping characteristics, playing a crucial role in improving vehicle handling stability and ride comfort. Currently, mainstream single-valve shock absorbers employ a single solenoid valve control mechanism. Their working principle is based on the hydraulic resistance generated when the piston rod, during its extension and compression motion, drives the oil in the cylinder to flow through a specific orifice. This resistance can be decomposed into two mechanical components: restoring damping force and compression damping force. The solenoid valve adjusts the damping force by regulating the oil flow path. However, due to the inherent characteristics of the single-valve structure, the oil must share a relatively long flow path during both the compression and restoring strokes. This structural defect forces the system to compress the maximum load capacity of the compression stroke to meet the damping force requirements of the restoring stroke, thus affecting vehicle ride smoothness. To overcome the technical limitations of the single-valve structure, a dual-solenoid valve control system has emerged. This design employs a split intermediate cylinder structure, using two independent solenoid valves to separately regulate the restoring and compression damping forces.

[0003] Currently, most dual-valve vibration dampers use a segmented, assembled intermediate cylinder with a sealing device at the oil passage interface of the working cylinder, which theoretically achieves mechanical decoupling of the two chambers. However, in practical applications, it has been found that the existing sealing structure has the potential for leakage, and the assembly process of the split cylinder is complex, requiring high manufacturing precision and assembly consistency, which poses challenges to product reliability and mass production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to avoid leakage at the sealing point of the spliced ​​cylinder body.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: an intermediate cylinder structure, including an upper intermediate cylinder, a lower intermediate cylinder, and an S-shaped sealing element located at the connection end between the upper intermediate cylinder and the lower intermediate cylinder. The sealing element has two grooves, each groove containing a sealing ring. One sealing ring is located on the mating surface between the upper intermediate cylinder and the working cylinder, and the other sealing ring is located in the press-fitting area between the upper intermediate cylinder and the lower intermediate cylinder.

[0006] As a preferred technical solution, one end of the seal is integrally formed with the end of the upper intermediate cylinder that is opposite to the lower intermediate cylinder, and the other end is interference-fitted with the inner wall of the lower intermediate cylinder.

[0007] As a preferred technical solution, one end of the sealing element is fixedly connected to the upper intermediate cylinder, and the other end is fixedly connected to the lower intermediate cylinder.

[0008] As a preferred technical solution, the groove includes an upper groove and a lower groove. A sealing ring 1 is provided in the upper groove. The sealing ring 1 is located on the mating surface between the bottom of the upper intermediate cylinder and the working cylinder. A sealing ring 2 is provided in the lower groove. The sealing ring 2 is located in the press-fitting area between the upper intermediate cylinder and the lower intermediate cylinder.

[0009] As a preferred technical solution, it also includes a working cylinder, with the upper working cylinder and the lower working cylinder press-fitted and fixed, and located outside the working cylinder. The end of the lower intermediate cylinder opposite to the upper intermediate cylinder and the end of the upper intermediate cylinder opposite to the lower intermediate cylinder are respectively sealed and fixed to the outer wall of the working cylinder by a sealing ring.

[0010] As a preferred technical solution, the end of the lower intermediate cylinder opposite to the upper intermediate cylinder and the end of the upper intermediate cylinder opposite to the lower intermediate cylinder are both provided with annular grooves that are compatible with the sealing ring.

[0011] As a preferred technical solution, both ends of the upper and lower intermediate cylinders have radially tapered structures.

[0012] As a preferred technical solution, a working cylinder oil chamber is provided inside the working cylinder. The working cylinder, together with the upper working cylinder and the lower working cylinder, forms an upper intermediate cylinder oil chamber and a lower intermediate cylinder oil chamber. The working cylinder oil chamber is connected to the upper intermediate cylinder oil chamber and the lower intermediate cylinder oil chamber.

[0013] This utility model also provides a shock absorber assembly, including the above-mentioned intermediate cylinder structure.

[0014] This utility model also provides an air spring assembly, including the above-mentioned shock absorber assembly.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) In this utility model, by setting up an S-shaped seal and sealing ring one and sealing ring two, and making sealing ring one located at the bottom of the upper intermediate cylinder and the mating surface of the working cylinder, and sealing ring two located in the press-fitting mating area between the upper intermediate cylinder and the lower intermediate cylinder, the complete physical isolation of the oil circuit of the restoration chamber and the compression chamber is achieved, effectively solving the technical pain point of oil seepage and leakage in the traditional structure, and ensuring the independence and stability of damping force control.

[0017] (2) In this utility model, the synergy of the guide of the protruding sealing element and the interference fit effectively solves the problem of skew and misalignment that are easy to occur during the press-fitting of the split cylinder body; the integration of key components can be completed by a single press-fitting process, which greatly reduces the assembly complexity and precision control difficulty of the traditional segmented splicing structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the intermediate cylinder provided in an embodiment of the present utility model;

[0019] Figure 2 Provided for the embodiments of this utility model Figure 1 A partial enlarged structural diagram of A;

[0020] Figure 3 Provided for the embodiments of this utility model Figure 1 A magnified schematic diagram of the B-section structure;

[0021] Figure 4 A schematic diagram of the upper intermediate cylinder structure provided in this embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the lower intermediate cylinder structure provided in an embodiment of the present utility model;

[0023] Reference numerals: 1. Upper intermediate cylinder; 2. Working cylinder; 3. Lower intermediate cylinder; 4. Sealing ring one; 5. Sealing ring two; 6. Sealing ring three; 7. Seal. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] See Figure 1 , Figure 2 An intermediate cylinder structure includes an intermediate cylinder and a working cylinder 2. The intermediate cylinder is a split structure, comprising an upper intermediate cylinder 1 and a lower intermediate cylinder 3. The upper intermediate cylinder 1 and the lower intermediate cylinder 3 are press-fitted and fixed to the outside of the working cylinder 2. A working cylinder oil chamber is formed inside the working cylinder 2. An intermediate cylinder oil chamber is formed between the upper intermediate cylinder 1, the lower intermediate cylinder 3 and the working cylinder 2. A sealing element 7 is provided at the connection between the upper intermediate cylinder 1 and the lower intermediate cylinder 3. In this embodiment, the sealing element 7 is provided at the end where the upper intermediate cylinder 1 and the lower intermediate cylinder 3 are connected. One end of the sealing element 7 is fixed to the bottom of the upper intermediate cylinder 1, and the other end is fixed to the lower intermediate cylinder 3. In this embodiment, one end of the sealing element 7 is integrally formed with the end of the upper intermediate cylinder 1 away from the lower intermediate cylinder 3, and the other end is press-fitted to the inner wall of the lower intermediate cylinder 3. Of course, the sealing element 7 can also be provided at the end where the lower intermediate cylinder 3 and the upper intermediate cylinder 1 are connected.

[0027] See Figure 2The sealing element 7 is S-shaped, dividing the intermediate cylinder oil chamber into an upper intermediate cylinder oil chamber and a lower intermediate cylinder oil chamber. Both the upper and lower intermediate cylinder oil chambers can be individually connected to the working cylinder oil chamber. The sealing element 7 has two grooves, each containing a sealing ring. In this embodiment, the two grooves are an upper groove and a lower groove. The upper groove contains a sealing ring 4, which is located at the mating surface between the bottom of the upper intermediate cylinder 1 and the working cylinder 2. This sealing ring 4 is used to block the oil passage connection between the upper intermediate cylinder 1 and the working cylinder 2, thus preventing oil from leaking from the upper intermediate cylinder oil chamber into the lower intermediate cylinder oil chamber. The lower groove contains a sealing ring 5, which is located in the press-fitting area between the upper intermediate cylinder 1 and the lower intermediate cylinder 3. This sealing ring 5 is used to seal and protect the press-fitting area between the upper intermediate cylinder 1 and the lower intermediate cylinder 3, effectively solving the oil leakage problem that is prone to occur in the press-fitting area in traditional structures, and achieving multiple sealing protections.

[0028] participate Figure 3 The lower intermediate cylinder 3 is sealed and fixed to the outer wall of the working cylinder 2 by a sealing ring 36 at one end away from the upper intermediate cylinder 1. The upper intermediate cylinder 1 is sealed and fixed to the outer wall of the working cylinder 2 by a sealing ring 36 at one end away from the lower intermediate cylinder 3.

[0029] See Figure 3 , Figure 4 , Figure 5 Both the upper intermediate cylinder 1 and the lower intermediate cylinder 3 are cylinder barrel structures. Both ends of the upper intermediate cylinder 1 and the lower intermediate cylinder 3 are radially tapered structures. An annular groove adapted to the sealing ring 6 is opened in the tapered area. The radial tapered structure reduces the inner and outer diameter of the cylinder barrel end, so that it forms an interference fit interface with the working cylinder 2, ensuring the tightness of the structure after assembly. At the same time, the sealing ring 6 in the annular groove further enhances the dynamic sealing performance of the tapered area, which can effectively block the penetration path of oil in the interference fit interface.

[0030] It should be noted that the upper intermediate cylinder 1 and the lower intermediate cylinder 3 achieve an interference fit through a press-fit process. The protrusion on the seal 7 corresponding to the upper groove plays a guiding role during press-fitting. This structure achieves initial positioning and alignment through the precise interference fit between the inner diameter of the lower intermediate cylinder 3 and the protrusion. This guiding design not only guides the axial assembly path during the press-fitting stage but also ensures the relative positional accuracy of the upper intermediate cylinder 1 and the lower intermediate cylinder 3 through geometric constraints. This ensures that the press-fitted cylinder body meets key tolerance requirements such as coaxiality and concentricity. This structural solution effectively solves the problems of skewing and misalignment that easily occur during the press-fitting of split cylinder bodies through the synergistic effect of guidance and interference fit. Key component integration can be completed through a single press-fitting process, significantly reducing the assembly complexity and precision control difficulty of traditional segmented splicing structures.

[0031] In this embodiment, the working cylinder oil chamber is a compression chamber, and the upper intermediate cylinder oil chamber and the lower intermediate cylinder oil chamber are recovery chambers. Through the S-shaped seal 7 and sealing ring 4 and sealing ring 5, the sealing ring 4 is located at the mating surface between the bottom of the upper intermediate cylinder 1 and the working cylinder 2, and the sealing ring 5 is located in the press-fitting area between the upper intermediate cylinder 1 and the lower intermediate cylinder 3. This achieves complete physical isolation of the oil circuits of the recovery chamber and the compression chamber, effectively solving the technical pain point of oil leakage in traditional structures and ensuring the independence and stability of damping force control.

[0032] Example 2

[0033] The difference between this embodiment and embodiment 1 is that the seal 7 is a separate connector. One end of the seal 7 is fixedly connected to the upper intermediate cylinder 1, and the other end of the seal 7 is fixedly connected to the lower intermediate cylinder 3. This fixed connection can be achieved by press-fitting, interference fit, or other methods.

[0034] Example 3

[0035] The difference between this embodiment and Embodiment 1 is that a shock absorber assembly is provided, including the intermediate cylinder structure in Embodiment 1 or Embodiment 2.

[0036] Example 4

[0037] The difference between this embodiment and embodiment 3 is that an air spring assembly is provided, including the shock absorber assembly in embodiment 3.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An intermediate cylinder structure, characterized by, It includes an upper intermediate cylinder, a lower intermediate cylinder, and an S-shaped seal located at the connection end between the upper and lower intermediate cylinders. The seal has two grooves, each containing a sealing ring. One sealing ring is located on the mating surface between the upper intermediate cylinder and the working cylinder, and the other sealing ring is located in the press-fitting area between the upper and lower intermediate cylinders.

2. An intermediate cylinder structure according to claim 1, characterized in that One end of the seal is integrally formed with the end of the upper intermediate cylinder that is opposite to the lower intermediate cylinder, and the other end is interference-fitted with the inner wall of the lower intermediate cylinder.

3. An intermediate cylinder structure according to claim 1, characterized in that The sealing element is fixedly connected at one end to the upper intermediate cylinder and at the other end to the lower intermediate cylinder.

4. An intermediate cylinder structure according to claim 1, characterized in that The groove includes an upper groove and a lower groove. A sealing ring 1 is provided in the upper groove. The sealing ring 1 is located on the mating surface between the bottom of the upper intermediate cylinder and the working cylinder. A sealing ring 2 is provided in the lower groove. The sealing ring 2 is located in the press-fitting area between the upper intermediate cylinder and the lower intermediate cylinder.

5. An intermediate cylinder structure according to claim 1, characterized in that It also includes a working cylinder, with an upper working cylinder and a lower working cylinder press-fitted and fixed, located outside the working cylinder. The end of the lower intermediate cylinder opposite to the upper intermediate cylinder and the end of the upper intermediate cylinder opposite to the lower intermediate cylinder are respectively sealed and fixed to the outer wall of the working cylinder by a sealing ring.

6. An intermediate cylinder structure according to claim 5, characterized in that The lower intermediate cylinder at the end opposite to the upper intermediate cylinder and the upper intermediate cylinder at the end opposite to the lower intermediate cylinder are both provided with annular grooves that are compatible with the sealing rings.

7. An intermediate cylinder structure according to claim 1, characterized in that Both ends of the upper and lower intermediate cylinders have a radially tapered structure.

8. An intermediate cylinder structure according to claim 5, characterized in that The working cylinder has an oil chamber, which together with the upper working cylinder and the lower working cylinder form an upper intermediate cylinder oil chamber and a lower intermediate cylinder oil chamber. The working cylinder oil chamber is connected to the upper intermediate cylinder oil chamber and the lower intermediate cylinder oil chamber.

9. A shock absorber assembly characterized by, Includes the intermediate cylinder structure as described in any one of claims 1-8.

10. An air spring assembly characterized by, Includes the shock absorber assembly as described in claim 9.

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