Steel spring vibration isolator

Abstract

The utility model discloses a steel spring vibration isolator, which relates to the field of urban rail transit, and comprises a base, a moving part positioned above the base, and an elastic element positioned between the base and the moving part, the moving part comprises a top plate, an adapter ring positioned below the top plate, and a sealing ring positioned between the adapter ring and the base; the top plate is in threaded connection with the adapter ring; the top end of the elastic element abuts against the top plate. The utility model provides a steel spring vibration isolator to solve the problems that an existing steel spring vibration isolator is low in assembly efficiency, and an internal spring is inconvenient to replace or damping materials are inconvenient to add.

Description

Technical Field

[0001] This utility model relates to the field of urban rail transit, specifically to a steel spring vibration isolator. Background Technology

[0002] The vibrations generated during subway operation can impact surrounding buildings, precision instruments, and residents' lives, and have become a globally recognized urban environmental problem. In recent years, with residents' increasing demands for quality of life and the implementation of relevant policies, the need for subway vibration control has become increasingly urgent.

[0003] Existing vibration control measures for subways mainly focus on the vibration source, including vibration damping fasteners, flexible long / short sleepers, trapezoidal sleepers, vibration damping pad floating slab tracks, and vibration isolator floating slab tracks. Among these, steel spring floating slab tracks, as the only special vibration damping measure, are widely used in subway lines, with the longest service life exceeding 20 years.

[0004] Vibration isolators are crucial elastic components in steel spring floating slab track systems, serving to support the superstructure load and isolate vehicle-induced vibrations. When designing steel spring vibration isolators, the vibration system consisting of the track slab and the isolator is typically considered, aiming to reduce the natural frequency of the floating slab track system to a target value. However, traditional steel spring vibration isolators usually employ equally spaced cylindrical helical compression springs, exhibiting typical linear characteristics. When a train load passes, the quasi-static load acting on the floating slab track system initially increases and then decreases, causing changes in the equivalent mass on the isolator. This results in the natural frequency of the track system deviating from the design value, making it difficult to achieve the desired vibration isolation effect. Furthermore, existing steel spring vibration isolators often use bolts to connect the upper and lower components, resulting in numerous parts, low assembly efficiency, and inconvenience in replacing internal springs or adding damping materials. Utility Model Content

[0005] This utility model provides a steel spring vibration isolator, one of the technical problems to be solved is the low assembly efficiency of existing steel spring vibration isolators and the inconvenience of replacing internal springs or adding damping materials.

[0006] This utility model is achieved through the following technical solution:

[0007] A steel spring vibration isolator includes a base, a moving part located above the base, and an elastic element located between the base and the moving part. The moving part includes a top plate, a transition ring located below the top plate, and a sealing ring located between the transition ring and the base. The top plate and the transition ring are threadedly connected. The top end of the elastic element abuts against the top plate.

[0008] To address the problems of low assembly efficiency and inconvenience in replacing internal springs or adding damping materials in existing steel spring vibration isolators, this utility model proposes a steel spring vibration isolator. While some existing vibration isolator structures utilize threaded connections for stepless adjustment, these technologies suffer from inconvenience in partially disassembling the isolator, replacing internal elastic elements, or adding damping materials. Therefore, this application improves and optimizes the moving part, making it include a top plate, a transition ring, and a sealing ring. The top plate mates with the outer sleeve of the vibration isolator, and the transition ring is located below the top plate and threadedly connected to it. By adjusting the relative height between the transition ring and the top plate, the vibration isolator can be continuously adjusted to achieve stepless height adjustment. The sealing ring prevents the internal damping material from overflowing.

[0009] In this application, after the top plate is connected to the adapter ring, it can be installed as a whole into the outer sleeve that matches the vibration isolator. When it is necessary to disassemble and replace the internal springs or add damping materials, it is only necessary to keep the adapter ring stationary and rotate the top plate to remove it. Compared with the prior art, it has the advantages of convenient construction, high assembly rate, and easy disassembly and replacement of internal springs and damping materials.

[0010] Furthermore, the inner wall of the top plate is provided with an internal thread, and the outer wall of the adapter ring is provided with a first external thread, which matches the internal thread. This design allows the top plate to be threaded to the outside of the adapter ring, so that when the top plate is connected to the outer sleeve, the adapter ring will not interfere with the outer sleeve.

[0011] Furthermore, a second external thread is provided on the outer wall of the top plate. In the prior art, the inner wall of the outer sleeve of some vibration isolators has threads; this solution can connect with such outer sleeves that have internal threads, thereby expanding the range of continuous height adjustment.

[0012] Furthermore, damping material is disposed within the base. This solution fills the base with damping material to increase the damping of the vibration isolator; any liquid damping and / or solid damping material in the prior art can be applied.

[0013] Existing steel spring vibration isolators typically employ equally spaced cylindrical helical compression springs, whose stiffness exhibits a typical linear characteristic. When a train load passes, the quasi-static load acting on the floating slab track system first increases and then decreases, causing changes in the equivalent mass of the isolator. This results in the natural frequency of the track system deviating from the design value, making it difficult to achieve the ideal vibration isolation effect. To overcome these problems, this application proposes several elastic element structures with nonlinear mechanical characteristics. The stiffness of these elastic elements changes positively but nonlinearly with the vertical displacement of the track slab under vehicle load. That is, the isolator stiffness increases with increasing displacement, but not linearly. This keeps the natural frequency of the steel spring floating slab track system essentially constant, thus facilitating the achievement of a fixed-frequency design and further improving the vibration isolation effect of the isolator.

[0014] Preferably, the elastic element is a tower spring, which has a wider outer diameter at the bottom and a narrower outer diameter at the top. Using a tower spring with a typical narrower outer diameter at the bottom as the elastic element is beneficial for achieving a fixed-frequency design.

[0015] Preferably, the elastic element is a helical spring, and the pitch of the helical spring gradually increases from top to bottom. That is, using a helical spring with the typical characteristic of unequal pitch gradually increasing from top to bottom as the elastic element is beneficial for achieving constant frequency design.

[0016] Preferably, the elastic element is a helical spring, and the outer diameters at both ends of the helical spring are larger than the outer diameter at the axial center. That is, using a helical spring, which has the typical characteristics of being narrow in the middle and wide at both ends, as the elastic element is beneficial for achieving a fixed-frequency design.

[0017] Preferably, the elastic element is a helical spring, and the outer diameters at both ends of the helical spring are smaller than the outer diameter at the axial center. That is, using a helical spring with the typical characteristics of being wide in the middle and narrow at both ends as the elastic element is beneficial for achieving a fixed frequency design.

[0018] Preferably, the elastic element is a truncated conical spiral spring, i.e., a pagoda spring or a bamboo shoot spring, which is beneficial for achieving a fixed frequency design.

[0019] Of course, the specific dimensions and parameters of the above-mentioned elastic element structure need to be adapted to the working load of the matching track structure, and are not specifically limited in this application.

[0020] Compared with the prior art, this utility model has at least the following advantages and beneficial effects:

[0021] 1. This utility model provides a steel spring vibration isolator. When it is necessary to disassemble and replace the internal spring or add damping material, it is only necessary to keep the adapter ring stationary and rotate the top plate to remove it. Compared with the prior art, it has the advantages of convenient construction, high assembly rate, and easy disassembly and replacement of internal spring and damping material.

[0022] 2. This utility model provides a steel spring vibration isolator that can be adapted to an existing outer sleeve with internal threads, thereby expanding the range of continuous height adjustment.

[0023] 3. This utility model discloses a steel spring vibration isolator, which proposes a structure of several elastic elements with nonlinear mechanical characteristics. This allows the stiffness of the elastic elements to change positively but nonlinearly with the vertical displacement of the track slab under vehicle load. That is, the stiffness of the vibration isolator increases as the displacement increases, but the stiffness of the vibration isolator does not increase linearly. This keeps the natural frequency of the steel spring floating slab track system basically unchanged, which is conducive to achieving the purpose of fixed frequency design and further improving the vibration isolation effect of the vibration isolator. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 in a specific embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of Embodiment 2 in a specific embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of Embodiment 3 in a specific embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of Embodiment 4 in a specific embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of Embodiment 5 in a specific embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram of the top plate in a specific embodiment of the present invention.

[0031] The attached diagram shows the markings and corresponding component names:

[0032] 1-Base, 21-Top plate, 211-Plate body, 212-External threaded cylinder, 213-Internal threaded cylinder, 214-Spherical protrusion, 22-Adapter ring, 23-Sealing ring, 3-Elastic element, 4-Damping material. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model. In the description of this application, it should be understood that terms such as "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "high," "low," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0034] Example 1:

[0035] like Figure 1 The steel spring vibration isolator shown includes a base 1, a moving part located above the base 1, and an elastic element 3 located between the base 1 and the moving part. The base 1 contains a damping material 4. The moving part includes a top plate 21, a transition ring 22 located below the top plate 21, and a sealing ring 23 located between the transition ring 22 and the base 1. The top plate 21 and the transition ring 22 are threadedly connected. The top end of the elastic element 3 abuts against the top plate 21.

[0036] In this embodiment, the inner wall of the top plate 21 is provided with an internal thread, and the outer wall of the adapter ring 22 is provided with a first external thread, which matches the internal thread. Furthermore, the outer wall of the top plate 21 is also provided with a second external thread for threaded connection with the outer sleeve of the vibration isolator.

[0037] In this embodiment, the elastic element 3 is a truncated conical spiral tower spring, which has a wider outer diameter at the bottom and a narrower outer diameter at the top, and has a uniform pitch and a circular cross-section.

[0038] In this embodiment, the top plate 21 and the adapter ring 22 are tightened clockwise and can be screwed clockwise downwards into the outer sleeve of the vibration isolator as a whole; when it is necessary to disassemble and replace the internal elastic element 3 or add damping material 4, it is only necessary to rotate the top plate 21 counterclockwise to remove it.

[0039] Example 2:

[0040] A type of steel spring vibration isolator, such as Figure 2 As shown, the difference between this embodiment and embodiment 1 is that the elastic element 3 is a helical spring, and the pitch of the helical spring gradually increases from top to bottom; the helical spring also has a circular cross section.

[0041] Example 3:

[0042] A type of steel spring vibration isolator, such as Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the elastic element 3 is a helical spring, and the outer diameters of both ends of the helical spring are larger than the outer diameter of the axial center; the helical spring also adopts a circular cross section.

[0043] Example 4:

[0044] A type of steel spring vibration isolator, such as Figure 4 As shown, the difference between this embodiment and embodiment 1 is that the elastic element 3 is a helical spring, and the outer diameters of both ends of the helical spring are smaller than the outer diameter of the axial center; the helical spring also adopts a circular cross section.

[0045] Example 5:

[0046] A type of steel spring vibration isolator, such as Figure 5 As shown, the difference between this embodiment and embodiment 1 is that the elastic element 3 is a truncated cone spiral spring, also known as a pagoda spring or a bamboo shoot spring.

[0047] Example 6:

[0048] A steel spring vibration isolator, based on any of the above embodiments, wherein the top plate 21 is as follows: Figure 6 As shown, it includes a plate 211, an externally threaded cylinder 212 extending upward from the top surface of the plate 211, and an internally threaded cylinder 213 extending downward from the bottom surface of the plate 211; the internal thread is provided on the internally threaded cylinder 213.

[0049] The top plate 21 also includes a spherical protrusion 214 located on the bottom surface of the plate body 211. The spherical protrusion 214 is located inside the internal threaded cylinder 213, and the top end of the elastic element 3 is sleeved on the spherical protrusion 214.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

[0051] 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. Additionally, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

Claims

1. Steel spring vibration isolator comprising a base (1), a moving part located above the base (1), an elastic element (3) located between the base (1) and the moving part, characterized in that, The moving part comprises a top plate (21), an adapter ring (22) below the top plate (21), a sealing ring (23) between the adapter ring (22) and the base (1); the top plate (21) is threadedly connected with the adapter ring (22); the top end of the elastic element (3) abuts against the top plate (21).

2. A steel spring isolator according to claim 1, characterized in that An inner thread is arranged on the inner wall of the top plate (21), an first outer thread is arranged on the outer wall of the adapter ring (22), and the first outer thread matches the inner thread.

3. A steel spring isolator according to claim 1, wherein A second outer thread is arranged on the outer wall of the top plate (21).

4. A steel spring isolator as defined in claim 1 wherein, Damping material (4) is arranged in the base (1).

5. A steel spring isolator according to any one of claims 1 to 4, characterised in that, The elastic element (3) is a tower spring, and the outer diameter of the tower spring is wider at the lower part and narrower at the upper part.

6. A steel spring isolator according to any one of claims 1 to 4, characterised in that The elastic element (3) is a spiral spring, and the pitch of the spiral spring gradually increases from the upper part to the lower part.

7. A steel spring isolator according to any one of claims 1 to 4, characterized in that The elastic element (3) is a spiral spring, and the outer diameter of the spiral spring at the two axial ends is greater than the outer diameter at the axial center.

8. A steel spring isolator according to any one of claims 1 to 4, characterized in that The elastic element (3) is a spiral spring, and the outer diameter of the spiral spring at the two axial ends is smaller than the outer diameter at the axial center.

9. A steel spring isolator according to any one of claims 1 to 4, characterized in that The elastic element (3) is a truncated cone spiral spring.

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