Spring bidirectional composite metal rubber damper and working method thereof

Abstract

The application provides a spring bidirectional composite metal rubber damper and a working method thereof. The spring bidirectional composite metal rubber damper comprises a vertically arranged outer sleeve, one end of the outer sleeve is closed, the other end of the outer sleeve is internally provided with an inner sleeve, one end of the inner sleeve is closed, the other end of the inner sleeve is movably connected with a core shaft, an annular clamping shoulder is arranged in the middle of the inner sleeve, the annular clamping shoulder divides the inner sleeve into an upper damping cavity and a lower damping cavity, the shaft section of the core shaft located in the upper damping cavity is externally provided with an upper damping pad, the shaft section of the core shaft located in the lower damping cavity is externally provided with a lower damping pad, a lower connecting mechanism is arranged on the closed end of the outer sleeve, the end of the core shaft extends out of the open end of the inner sleeve, and an upper connecting structure is arranged on the extending end. The application is convenient for damping of aerospace, aviation, nuclear industry and military instruments, can solve the poor rigidity adjustability of the current single metal rubber damper, that is, it is difficult to realize the coordination between low rigidity and high durability, meanwhile, the structure has high lateral rigidity and compact structure.

Description

Technical Field

[0001] This invention relates to a spring-driven bidirectional composite metal-rubber vibration damper and its operating method. Background Technology

[0002] In the aviation, aerospace, military, and nuclear industries, vibration and noise reduction are crucial factors affecting the service performance of precision instruments and control equipment. Vibration and noise can adversely affect precision instruments, causing reduced accuracy, communication interruptions, and decreased durability. Studies on failures of aerospace equipment such as rockets and satellites show that approximately two-thirds of accidents are related to vibration. During the long-term use of aircraft, the failures of various instruments often stem from vibration and shock, severely impacting their reliability and lifespan. Furthermore, vibration and noise also seriously endanger human physical and mental health, making it a critical issue that environmental engineering urgently needs to address. Therefore, vibration reduction and noise reduction measures have significant engineering application value.

[0003] Vibration reduction technology mainly includes active vibration reduction, semi-active vibration reduction, and passive vibration reduction. Active and semi-active vibration reduction are not only bulky but also require control and power systems, making them highly complex. They are typically used in laboratories or other fields with limited space requirements. Passive vibration reduction and isolation absorb or dissipate the energy transferred to the structure by the vibration source through certain measures or additional substructures, or isolate the vibration source from the structure, thereby reducing structural vibration. Vibration dampers are generally used to separate the two. Because this type of vibration reduction technology does not require external energy, is relatively simple to implement, and can achieve a certain degree of vibration reduction, it is currently the fastest-growing and most widely used technology. In particular, its basic vibration reduction technology is quite mature and has been widely promoted and applied.

[0004] In practical applications, vibration dampers are typically composed of suitable elastic and damping materials, such as metal wire, rubber and cork, and pneumatic tires. Commonly used vibration damper types in engineering are polymer rubber vibration dampers and metal-rubber dampers (MRDs). The significant advantages of polymer rubber vibration dampers are ease of processing and low cost, but they suffer from easy aging, short shelf life, and temperature nonlinearity. MRDs, on the other hand, are unaffected by temperature, do not have aging problems, and possess characteristics such as resistance to high and low temperatures, strong shock absorption capacity, high damping, and resistance to media corrosion. The unique performance of MRDs makes them particularly suitable for the all-weather and long-term storage needs of weapon systems, gaining international consensus and becoming the mainstream direction for vibration reduction in weapon systems today and in the future.

[0005] While MRD (Metal Rubber Damping) offers a range of advantages, it often fails to meet the damping requirements of objects with large load variations throughout their entire operating cycle. It exhibits issues such as hysteresis nonlinearity, significant memory characteristics in the restoring force, and poor damping performance at low frequencies. This increases the difficulty of modeling and dynamic analysis of metal-rubber damping systems, making it difficult for the damper to achieve the desired performance. Improving damping performance is a pressing challenge and key issue for current metal-rubber dampers. To address this, many engineers and experts both domestically and internationally have proposed metal-rubber and spring-combined vibration isolators, employing a composite structure of metal rubber and metal springs. Therefore, to overcome the design challenges of spring-combined metal-rubber dampers, a compact structure with a two-way spring composite is proposed.

[0006] Liu Tao et al. (see patent CN209245149U) provided a composite vibration damper based on metal rubber and a metal spring. Metal rubber is used as the damping element to provide damping and dissipate vibration energy during operation; a cylindrical helical metal spring is used as the elastic element to provide stiffness and load-bearing capacity, achieving vertical vibration reduction. However, the composite vibration damper does not achieve a synergistic balance between low stiffness and high durability, and the structure does not consider lateral vibration performance. Therefore, this structure faces the problem of difficulty in coordinating low stiffness and high durability, poor lateral vibration performance, and even inability to conduct experiments with large vibration magnitudes. Summary of the Invention

[0007] In view of this, the purpose of this invention is to overcome the shortcomings of the prior art and provide a spring-driven bidirectional composite metal-rubber vibration damper and its working method, solving the problem of difficulty in achieving synergistic coordination between low stiffness and high durability; at the same time, it solves the problem that current integrated metal vibration dampers have poor lateral vibration damping effect and are even unable to conduct large vibration level experiments; this structure has the advantages of high lateral stiffness and compact structure, and can achieve improved vibration damping performance in a wide frequency range.

[0008] The present invention is implemented using the following scheme: A spring-driven bidirectional composite metal-rubber vibration damper includes a vertically arranged outer sleeve, one end of which is closed, and an inner sleeve installed inside the other end. One end of the inner sleeve is closed, and a spindle is movably connected inside the other end. An annular shoulder is provided in the middle of the inner cylinder of the inner sleeve, which divides the inner cylinder of the inner sleeve into an upper damping cavity and a lower damping cavity. An upper damping pad and a lower damping pad are respectively installed outside the shaft section of the spindle located in the upper damping cavity and outside the shaft section of the spindle located in the lower damping cavity. A lower connecting mechanism is installed on the closed end of the outer sleeve, and the end of the spindle extends from the open end of the inner sleeve, with an upper connecting structure provided on the extended end.

[0009] Furthermore, a cylindrical spiral groove is formed on the outer wall of the outer sleeve along the length of the outer sleeve, and the cylindrical spiral groove penetrates the outer wall of the outer sleeve and connects to the inner sleeve of the outer sleeve.

[0010] Furthermore, the outer periphery of the open end of the inner sleeve is bent outward to form a connecting disc. The outer wall of the inner sleeve is attached to the inner wall of the outer sleeve. The connecting disc is fixedly connected to the open end face of the outer sleeve. An annular limiting shoulder is provided on the inner edge of the open end of the inner sleeve. The mandrel extends into the inner sleeve from the middle of the annular limiting shoulder.

[0011] Furthermore, limiting flanges for fixing the upper or lower vibration damping cavity are installed on the shaft section outside the upper vibration damping cavity and the middle part of the shaft section of the lower vibration damping cavity.

[0012] Furthermore, the upper vibration damping pad includes upper vibration damping pad A and upper vibration damping pad B. Upper vibration damping pad A is sandwiched between the limiting flange and the annular limiting shoulder in the upper vibration damping cavity, and upper vibration damping pad B is sandwiched between the limiting flange and the annular clip in the upper vibration damping cavity.

[0013] Furthermore, the lower vibration damping pad includes a lower vibration damping pad A and a lower vibration damping pad B. The lower vibration damping pad A is sandwiched between the limiting flange and the annular shoulder in the lower vibration damping cavity, and the lower vibration damping pad B is sandwiched between the limiting flange and the inner wall of the closed end of the inner sleeve in the lower vibration damping cavity.

[0014] Furthermore, a spring mounting hole is provided on the end of the mandrel located inside the inner sleeve. A spring is installed in the spring mounting hole, with one end of the spring connected to the spring mounting hole and the other end connected to the inner wall of the closed end of the inner sleeve.

[0015] Furthermore, the lower connecting mechanism is a threaded connecting post, one end of which is fixed to the middle of the closed end of the outer sleeve, and the upper connecting structure is a threaded hole opened in the middle of the end of the mandrel.

[0016] Furthermore, the upper and lower vibration damping pads are metal rubber vibration damping pads or polymer rubber pads.

[0017] A method for using a spring-loaded bidirectional composite metal-rubber vibration damper:

[0018] S1: The lower damping pad A is sandwiched between the limiting flange and the annular shoulder in the lower damping cavity, and the lower damping pad B is sandwiched between the limiting flange and the inner wall of the closed end of the inner sleeve in the lower damping cavity. The upper damping pad A is sandwiched between the limiting flange and the inner wall of the non-closed end of the inner sleeve in the upper damping cavity, and the upper damping pad B is sandwiched between the limiting flange and the annular shoulder in the upper damping cavity.

[0019] S2: Fix the connecting plate to the open end face of the outer sleeve, then connect the connecting post on the closed end of the outer sleeve to the vibration source device through the lower thread, and then connect it to the vibration damping device through the threaded hole on the protruding end of the spindle.

[0020] S3: When in use, the upper and lower vibration damping pads inside the inner sleeve absorb vibration when the equipment being damped vibrates. At the same time, a cylindrical spiral groove is opened on the outer sleeve along the length of the outer sleeve, making the outer sleeve a spiral irregular spring with a large cross-sectional area, which can absorb a large amount of energy; improving the vibration damping performance while preventing overload.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) This vibration damper achieves vibration damping through the combined action of upper and lower damping pads and outer sleeve, realizing a synergistic coordination between low stiffness and high durability, and significantly improving lateral vibration performance. By changing the spring stiffness, the resonant frequency can be adjusted; at the same time, the lateral stiffness is increased. This vibration damper can enhance low-frequency vibration damping performance and impact resistance, achieving improved vibration damping performance over a wide frequency range.

[0023] (2) This vibration damper can prevent overload. When the load is too large, the outer sleeve provides additional support to ensure the stability of the structure and play a certain protective role. It improves the shortcomings of traditional metal rubber vibration dampers in terms of poor overload protection.

[0024] (3) Compared with the traditional sleeve-type metal rubber vibration damper, this vibration damper has solved the problem that the traditional metal rubber vibration damper is prone to producing metal powder falling onto the equipment, causing the equipment precision to be affected or even damaged due to its integrated closed structure. At the same time, it can be eliminated from disassembly, which extends the life of the vibration damper and enhances the vibration damping effect, and also greatly saves maintenance costs. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the composite vibration damper of the present invention;

[0026] Figure 2 This is a cross-sectional view of the overall structure of the composite vibration damper of the present invention;

[0027] Figure 3 This is a cross-sectional view of the overall structure of the composite vibration damper in Embodiment 1 of the present invention;

[0028] Figure 4 This is a cross-sectional view of the overall structure of the composite vibration damper in Embodiment 2 of the present invention.

[0029] In the diagram: 1-Outer sleeve; 2-Lower vibration damping pad; 3-Upper vibration damping pad; 4-Inner sleeve; 5-Mandrel; 6-Transition flange; 7-Annular shoulder; 8-Upper vibration damping cavity; 9-Lower vibration damping cavity; 10-Cylindrical spiral groove; 11-Connecting disc; 12-Annular limiting shoulder; 13-Limiting flange; 14-Upper vibration damping pad A; 15-Upper vibration damping pad B; 16-Lower vibration damping pad A; 17-Lower vibration damping pad B; 18-Connecting column; 19-Threaded hole; 20-Metal spring; 21-Spring mounting hole. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Example 1, as Figure 1-3 As shown, a spring-driven bidirectional composite metal-rubber vibration damper includes a vertically arranged outer sleeve 1, one end of which is closed, and an inner sleeve 4 installed inside the other end. One end of the inner sleeve is also closed, and a spindle 5 is movably connected to the other end. An annular shoulder 7 is provided in the middle of the inner cylinder of the inner sleeve, which divides the inner cylinder of the inner sleeve into an upper damping cavity 8 and a lower damping cavity 9. An upper damping pad 2 and a lower damping pad 3 are respectively installed outside the shaft section of the spindle located in the upper damping cavity and outside the shaft section of the spindle located in the lower damping cavity. A lower connecting mechanism is installed on the closed end of the outer sleeve, and the end of the spindle extends from the open end of the inner sleeve, with an upper connecting structure provided on the extended end.

[0034] In this example, a cylindrical spiral groove 10 is formed on the outer wall of the outer sleeve along the length direction of the outer sleeve. The cylindrical spiral groove penetrates the outer wall of the outer sleeve and is connected to the inner sleeve of the outer sleeve.

[0035] In this example, the outer periphery of the open end of the inner sleeve is bent outward to form a connecting disc 11. The outer wall of the inner sleeve is attached to the inner wall of the outer sleeve. The connecting disc is fixedly connected to the open end face of the outer sleeve. An annular limiting shoulder 12 is provided on the inner edge of the open end of the inner sleeve. The mandrel extends into the inner sleeve from the middle of the annular limiting shoulder.

[0036] In this example, limiting flanges 13 for fixing the upper or lower vibration damping cavity are installed on the shaft section outside the upper vibration damping cavity and the middle part of the shaft section of the lower vibration damping cavity.

[0037] In this example, the upper vibration damping pad includes upper vibration damping pad A14 and upper vibration damping pad B15. Upper vibration damping pad A is sandwiched between the limiting flange and the annular limiting shoulder in the upper vibration damping cavity, and upper vibration damping pad B is sandwiched between the limiting flange and the annular clip in the upper vibration damping cavity.

[0038] In this example, the lower vibration damping pad includes lower vibration damping pad A16 and lower vibration damping pad B17. Lower vibration damping pad A is sandwiched between the limiting flange and the annular shoulder in the lower vibration damping cavity, and lower vibration damping pad B is sandwiched between the limiting flange and the inner wall of the closed end of the inner sleeve in the lower vibration damping cavity.

[0039] In this example, the inner sleeve can be formed by combining two semi-circular arc sleeves, which facilitates the installation of the mandrel, limiting flange, upper damping pad, and lower damping pad. The two semi-circular arc sleeves of the inner sleeve can be directly fixed together by bolts, or the upper half connecting plate of the semi-circular arc sleeve can be fixed on a fixed ring plate, with the half connecting plates mating together to form a connecting plate, and the semi-circular arc sleeves mating together to form the inner sleeve. Of course, other existing connection methods can also be used, as long as the installation of the mandrel, limiting flange, upper damping pad, and lower damping pad can be achieved.

[0040] In this example, the lower connecting mechanism is a threaded connecting post 18, one end of which is fixed to the middle of the closed end of the outer sleeve. The upper connecting structure is a threaded hole 19 opened in the middle of the end of the spindle. A transition flange 6 for connecting with the external vibration damping equipment can be connected to the end of the extended end of the spindle. The transition flange can be designed according to the size of the vibration damping equipment and is a transition piece for connecting the vibration damping equipment and the spindle.

[0041] In this example, the upper and lower vibration damping pads are metal rubber vibration damping pads or polymer rubber pads.

[0042] A method for using a spring-loaded bidirectional composite metal-rubber vibration damper:

[0043] S1: The lower damping pad A is sandwiched between the limiting flange and the annular shoulder in the lower damping cavity, and the lower damping pad B is sandwiched between the limiting flange and the inner wall of the closed end of the inner sleeve in the lower damping cavity. The upper damping pad A is sandwiched between the limiting flange and the inner wall of the non-closed end of the inner sleeve in the upper damping cavity, and the upper damping pad B is sandwiched between the limiting flange and the annular shoulder in the upper damping cavity.

[0044] S2: Fix the connecting plate to the open end face of the outer sleeve, then connect the connecting post on the closed end of the outer sleeve to the vibration source device through the lower thread, and then connect it to the vibration damping device through the threaded hole on the protruding end of the spindle.

[0045] S3: When in use, the upper and lower vibration damping pads inside the inner sleeve absorb vibration when the equipment being damped vibrates. At the same time, a cylindrical spiral groove is opened on the outer sleeve along the length of the outer sleeve, making the outer sleeve a spiral irregular spring with a large cross-sectional area, which can absorb a large amount of energy; improving the vibration damping performance while preventing overload.

[0046] Example 2, as Figure 4 As shown, compared with Embodiment 1, in this example, a vibration damping mechanism is further added to the end of the mandrel located inside the inner sleeve. Specifically, a spring mounting hole 21 is provided on the end of the mandrel located inside the inner sleeve, and a spring 20 is installed in the spring mounting hole. One end of the spring is connected to the spring mounting hole, and the other end is connected to the inner wall of the closed end of the inner sleeve. When the vibration displacement of the vibration damping system is small, the spring plays the main role in vibration damping. When the vibration displacement of the vibration damping system is large, the upper vibration damping pad, the lower vibration damping pad, the spring, and the outer sleeve work together to play a vibration damping role, further improving the axial vibration damping performance. Since the structure of other components is the same as that of Embodiment 1, only the added vibration damping mechanism is described, and other structures are not described in detail.

[0047] The vibration damper of this invention consists of two layers, upper and lower, each connected in parallel via upper and lower damping pads, symmetrically arranged, and then connected in series with an outer sleeve to jointly achieve vibration damping. This structure achieves a synergistic balance between low stiffness and high durability. By adjusting the spring stiffness, the resonant frequency can be adjusted, while simultaneously increasing the lateral stiffness. This vibration damper effectively improves its lateral vibration performance, enhances low-frequency damping performance and impact resistance, achieving improved vibration damping performance over a wide frequency range. Furthermore, its integrated, enclosed structure prevents generated metal powder from falling onto the equipment, thus avoiding problems such as affecting equipment precision or even causing damage. It also eliminates the need for disassembly, extending the damper's lifespan and enhancing its damping effect, while significantly reducing maintenance costs.

[0048] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0049] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0050] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0051] Furthermore, the orientations or positional relationships used in any of the technical solutions disclosed in this invention above to indicate positional relationships, such as "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent. They are not intended to 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 limitations on this patent. In addition, unless otherwise stated, the terms used to indicate shape in any of the technical solutions disclosed in this invention above include shapes that are similar to, close to, or approximate with it.

[0052] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A spring-driven bidirectional composite metal-rubber vibration damper, characterized in that: The device includes a vertically arranged outer sleeve, one end of which is closed, and an inner sleeve installed inside the other end. One end of the inner sleeve is also closed, and a mandrel is movably connected to the other end. An annular shoulder is provided in the middle of the inner cylinder of the inner sleeve, which divides the inner cylinder of the inner sleeve into an upper damping cavity and a lower damping cavity. An upper damping pad and a lower damping pad are respectively installed outside the shaft section of the mandrel located in the upper damping cavity and outside the shaft section of the mandrel located in the lower damping cavity. A lower connecting mechanism is installed on the closed end of the outer sleeve, and the end of the mandrel extends from the open end of the inner sleeve, with an upper connecting structure provided on the extended end. A cylindrical spiral groove is formed on the outer wall of the outer sleeve along the length of the outer sleeve. The cylindrical spiral groove penetrates the outer wall of the outer sleeve and connects to the inner sleeve of the outer sleeve.

2. The spring-driven bidirectional composite metal-rubber vibration damper according to claim 1, characterized in that: The outer periphery of the open end of the inner sleeve is bent outward to form a connecting disc. The outer wall of the inner sleeve is attached to the inner wall of the outer sleeve. The connecting disc is fixedly connected to the open end face of the outer sleeve. An annular limiting shoulder is provided on the inner edge of the open end of the inner sleeve. The mandrel extends into the inner sleeve from the middle of the annular limiting shoulder.

3. The spring-driven bidirectional composite metal-rubber vibration damper according to claim 2, characterized in that: The mandrel located outside the shaft section of the upper damping cavity and the mandrel located in the middle of the shaft section of the lower damping cavity are both equipped with limiting flanges for fixing the upper or lower damping cavity.

4. The spring-driven bidirectional composite metal-rubber vibration damper according to claim 3, characterized in that: The upper vibration damping pad includes upper vibration damping pad A and upper vibration damping pad B. Upper vibration damping pad A is sandwiched between the limiting flange and the annular limiting shoulder in the upper vibration damping cavity, and upper vibration damping pad B is sandwiched between the limiting flange and the annular clip in the upper vibration damping cavity.

5. The spring-driven bidirectional composite metal-rubber vibration damper according to claim 4, characterized in that; The lower vibration damping pad includes a lower vibration damping pad A and a lower vibration damping pad B. The lower vibration damping pad A is sandwiched between the limiting flange and the annular shoulder in the lower vibration damping cavity, and the lower vibration damping pad B is sandwiched between the limiting flange and the inner wall of the closed end of the inner sleeve in the lower vibration damping cavity.

6. The spring-driven bidirectional composite metal-rubber vibration damper according to claim 5, characterized in that; The mandrel has a spring mounting hole at its end inside the inner sleeve. A spring is installed in the spring mounting hole, with one end of the spring connected to the spring mounting hole and the other end connected to the inner wall of the closed end of the inner sleeve.

7. The spring-driven bidirectional composite metal-rubber vibration damper according to any one of claims 5 or 6, characterized in that; The lower connecting mechanism is a threaded connecting post, one end of which is fixed to the middle of the closed end of the outer sleeve. The upper connecting structure is a threaded hole opened in the middle of the end of the mandrel.

8. The spring-driven bidirectional composite metal-rubber vibration damper according to claim 7, characterized in that; The upper and lower vibration damping pads are metal rubber damping pads or polymer rubber pads.

9. A method of using a spring-driven bidirectional composite metal-rubber vibration damper, employing the metal-rubber vibration damper as described in claim 8, characterized in that: S1: The lower damping pad A is sandwiched between the limiting flange and the annular shoulder in the lower damping cavity, and the lower damping pad B is sandwiched between the limiting flange and the inner wall of the closed end of the inner sleeve in the lower damping cavity. The upper damping pad A is sandwiched between the limiting flange and the inner wall of the non-closed end of the inner sleeve in the upper damping cavity, and the upper damping pad B is sandwiched between the limiting flange and the annular shoulder in the upper damping cavity. S2: Fix the connecting plate to the open end face of the outer sleeve, then connect the connecting post on the closed end of the outer sleeve to the vibration source device through the lower thread, and then connect it to the vibration damping device through the threaded hole on the protruding end of the spindle. S3: When in use, the upper and lower vibration damping pads inside the inner sleeve absorb vibration when the equipment being damped vibrates. At the same time, a cylindrical spiral groove is opened on the outer sleeve along the length of the outer sleeve, making the outer sleeve a spiral irregular spring with a large cross-sectional area, which can absorb a large amount of energy; improving the vibration damping performance while preventing overload.

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