A micro-vibration absorber

Abstract

The present application discloses a micro-vibration absorber, which relates to the field of vibration absorbers. It includes a metal shell fixed on a platform. At the bottom of the inner cavity of the metal shell, a main spring with the same natural vibration frequency in the vertical and horizontal directions is fixedly arranged. At the upper end of the main spring, a steel ball for vibration reduction is fixedly arranged. There are movable gaps between the steel ball and the outer side of the main spring and the inner wall of the metal shell. At the opening at the upper end of the metal shell, a cover plate is fixedly arranged. There is a reserved movable space between the lower end of the cover plate and the steel ball. And the inside of the metal shell is filled with damping liquid for damping and is in contact with the cover plate. The steel ball and the main spring are both immersed in the damping liquid to achieve vibration absorption, breaking through the structural size limitation of traditional vibration absorbers, realizing the control of line spectrum vibration of the optical platform, and having the ability to work in multiple directions. This low-frequency micro-vibration absorber has a small volume and can perform low-frequency micro-vibration control in multiple directions, solving the micro-vibration problems of optical platforms and high-end laboratory platforms.

Description

Technical Field

[0001] This application relates to the field of shock absorbers, and particularly to a micro-vibration absorber. Background Art

[0002] With the continuous development of modern science and technology, the performance indicators such as precision, resolution, and stability of precision instruments are constantly improving, and more stringent requirements are put forward for reducing micro-vibrations in the working environment, especially low-frequency micro-vibrations. At present, in the fields of aerospace, precision machinery manufacturing, high-end laboratories, optical platforms, automotive damping and vibration control, etc., due to the particularity of their working conditions, strict requirements are put forward for vibration control means and methods. Currently, the commonly used micro-vibration control methods can be divided into active control, semi-active control, and passive control. Generally, active and semi-active control technologies are used for low-frequency micro-vibration control, and passive control technologies are used for high-frequency micro-vibration control. Since the damping in the working environment of some precision instruments (such as semiconductor equipment environment) is low, micro-vibrations with a long duration will be generated. These micro-vibrations will gradually couple to form a micro-vibration environment covering a wide frequency range and having complex components, making it impossible for precision instruments to work normally. This situation requires higher vibration control, and it is necessary to achieve micro-vibration control for a variety of complex frequencies. In the experimental environment, active and semi-active control technologies can achieve good control effects for low-frequency micro-vibrations. However, it is difficult to provide active conditions for the installation environment of some precision instruments, and at the same time, higher requirements are put forward for the stability of vibration control equipment. Therefore, under the actual engineering conditions, the passive method has become the preferred vibration control means due to its high stability and the fact that no energy input is required. However, it is still a difficult problem to control low-frequency micro-vibrations by the passive method.

[0003] As an additional system installed on vibrating devices, shock absorbers can control the line-spectrum vibration problems that occur in such vibrating devices. However, traditional shock-absorbing devices are often large in size and have space limitations. Therefore, it is necessary to develop low-frequency micro-vibration shock absorbers that meet the requirements in terms of both volume and material.

[0004] Traditional vibration absorbers can generally only control the vibration of line spectra. When the vibration frequency of the main system deviates from the working frequency of the vibration absorber, the vibration control ability of the vibration absorber significantly decreases. Many scholars have conducted a large number of related studies to broaden the working frequency of the vibration absorber, but most of them improve the design of the vibration absorber based on the principle of local resonance. Usually, multiple vibration absorbers with different working frequencies or the structural parameters of the vibration absorber are improved to make it have multiple vibration modes to control the vibration signals of more frequencies. It should be noted that the vibration absorber designed based on the principle of local resonance usually only has part of its working state for the vibration signals of each specific frequency in the broadband, and there are many limitations. The traditional vibration absorber module is mainly composed of a mass unit and an elastic unit, and the vibration of the main system at this frequency is transferred through the energy dissipation effect of the vibration absorber unit at its natural frequency. Therefore, usually, a dynamic vibration absorber is generally used to control the vibration of line spectra at specific frequencies. In order to use the vibration absorber to achieve the vibration control of broadband signals, multiple or distributed vibration absorbers are often used to suppress the structural vibration at present. Therefore, the vibration reduction effect of the existing vibration absorbers is not good during the three-dimensional vibration of the optical platform and high-end laboratories. Summary of the Invention

[0005] In order to improve the problem of three-dimensional vibration of the optical platform and high-end laboratories, the present application provides a micro-vibration absorber.

[0006] The micro-vibration absorber provided by the present application adopts the following technical solutions:

[0007] A micro-vibration absorber includes a metal shell fixed on a platform. A main spring with the same natural frequency in the vertical and horizontal directions is fixedly arranged at the bottom of the inner cavity of the metal shell. A steel ball for vibration reduction is fixedly arranged at the upper end of the main spring. There are movable gaps between the steel ball and the outer side of the main spring and the inner wall of the metal shell.

[0008] A cover plate is fixedly arranged at the opening at the upper end of the metal shell. There is a movable space reserved between the lower end of the cover plate and the steel ball. The inside of the metal shell is filled with damping liquid for damping and is in contact with the cover plate. The steel ball and the main spring are both immersed in the damping liquid to achieve vibration absorption.

[0009] By adopting the above technical solutions, this vibration absorber consists of a main spring, a steel ball, damping liquid, and a metal shell to form a mass-spring system. The mass-spring system has the same natural frequency in the vertical and horizontal directions, and its frequency is equal to the vibration frequency to be controlled. Using the stiffness characteristics of the spring-mass system, a low-frequency micro-vibration absorber is developed, breaking through the structural size limitation of traditional vibration absorbers, realizing the control of the line spectrum vibration of the optical platform, and having the ability to work in multiple directions. This low-frequency micro-vibration absorber has a small volume and can perform low-frequency micro-vibration control in multiple directions, solving the micro-vibration problems of the optical platform and high-end laboratory platforms.

[0010] Preferably, the lower end of the main spring and the bottom of the metal shell are fixedly connected through a locking mechanism.

[0011] By adopting the above technical solution, the setting of the locking mechanism can facilitate the user to replace the main spring with different stiffness coefficients, thereby reducing the use cost and being convenient for replacement. At the same time, it is also convenient for the installation and disassembly of the main spring without damaging the metal shell, and can also achieve a certain vibration absorption effect.

[0012] Preferably, the locking mechanism includes an arc-shaped seat fixedly arranged on one side of the bottom of the metal shell, and an arc-shaped slider fixedly arranged at the lower end of the main spring is inserted into the arc-shaped seat.

[0013] By adopting the above technical solution, the arc-shaped slider slides in the arc-shaped seat to achieve the effect of limiting and fixing, so that the main spring and the metal shell form an integral body, which is conducive to the transmission of vibration.

[0014] Preferably, a notch is opened in the middle and lower part of one side of the arc-shaped slider, and a limiting tooth is fixedly arranged in the middle of the surface of the notch.

[0015] By adopting the above technical solution, the surface of the notch is set to be smooth, and the limiting tooth can be embedded inside the arc-shaped slider to improve the connection stability of the limiting tooth. At the same time, the limiting tooth can limit the limiting plate.

[0016] Preferably, an installation groove communicating with the middle of the arc-shaped seat is opened on one side of the arc-shaped seat, a connecting shaft is fixedly arranged in the middle of the installation groove, a rotating sleeve is sleeved on the surface of the connecting shaft, the top end of the connecting shaft is located at two-thirds of the inside of the rotating sleeve, and a limiting plate for clamping and limiting with the limiting tooth is fixedly arranged on one side of the surface of the rotating sleeve;

[0017] When the limiting tooth is clamped and limited with the limiting plate, the limiting plate is in an inclined state.

[0018] By adopting the above technical solution, the rotating sleeve rotates on the connecting shaft, and the connecting shaft realizes the supporting effect on the rotating sleeve. At the same time, the limiting plate and the rotating sleeve are integrally formed, and the installation groove can store the limiting plate.

[0019] Preferably, a side spring is fixedly arranged between the middle of the surface of the limiting plate and the inner wall of the installation groove;

[0020] When the limiting tooth is clamped with the limiting plate, the side spring is in a stretched state.

[0021] By adopting the above technical solution, the compression path of the side spring is on the rotation path of the limiting plate, thereby avoiding the irregular bending of the side spring, resulting in accelerated damage. At the same time, the side spring can pull the limiting plate into the installation groove.

[0022] Preferably, an upper cover is fixedly provided at the upper end of the arc seat. A rectangular hole is formed in the upper cover at a position corresponding to the connecting shaft. A rectangular rod is slidably arranged longitudinally in the rectangular hole, and a T-shaped column is fixedly provided at the upper end of the rectangular rod.

[0023] By adopting the above technical solution, the upper cover is provided to limit the arc-shaped slider to prevent it from detaching from the arc seat, and the rectangular hole limits the rectangular rod to prevent the rectangular rod from rotating.

[0024] Preferably, ear plates are fixedly provided on both sides of the lower end of the rectangular rod, and longitudinal springs are fixedly provided between the upper ends of the ear plates and the upper cover.

[0025] By adopting the above technical solution, the ear plates support the longitudinal springs, and the reaction force of the longitudinal springs can insert the limiting slot into the inner part of the rotating sleeve and engage with the inner limiting teeth for limiting.

[0026] Preferably, a limiting slot is fixedly provided at the lower end of the rectangular rod, and inner limiting teeth for plugging and engaging with the limiting slot are arranged on the inner wall at the upper one-third of the rotating sleeve.

[0027] By adopting the above technical solution, the limiting slot can limit the rotation of the inner limiting teeth and thus limit the rotation of the rotating sleeve.

[0028] Preferably, when the T-shaped column is pulled up to the uppermost end, the limiting slot is completely separated from the inner limiting teeth. Under normal conditions, the stretching side spring of the limiting plate limits through the limiting slot, the inner limiting teeth, and the rectangular rod and the rectangular hole.

[0029] By adopting the above technical solution, the limiting plate can be released to take out the arc-shaped slider. At the same time, the limiting plate can be pulled out of the installation groove, so that the limiting plate is in an inclined state to re-achieve the function of engaging and limiting with the limiting teeth.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] The metal shell transfers the vibration force to the main spring. The main spring drives the steel ball to swing to achieve the vibration absorption effect. The damping liquid consumes the energy of the vibration of the steel ball and the main spring to achieve the vibration absorption effect. The space between the main spring, the steel ball, and the metal shell is filled with silicone oil as a damper. Since the side stiffness of the metal shell can be controlled to be consistent with the vertical frequency, the present vibration absorber consists of a main spring, a steel ball, a damping liquid, and a metal shell to form a mass-spring system. Among them, the mass-spring system has the same natural vibration frequency in the vertical and horizontal directions, and its frequency is equal to the vibration frequency to be controlled. Through the structural design of the vibration absorber and the optimization of the stiffness characteristics of the elastic elements, the present vibration absorber has the characteristics of multi-directional vibration reduction. In order to further broaden the working frequency band of the vibration absorber, through the linear mechanical characteristics, the natural vibration frequencies in three directions of the vibration absorber system are reduced, so that it has better dynamic response ability and a wider working frequency band compared with the traditional vibration absorber.

[0032] By applying the stiffness characteristics of the spring-mass system, a low-frequency micro-vibration absorber was developed, breaking through the limitation of the structural size of traditional absorbers, achieving the control of the line spectrum vibration of the optical platform, and having the ability to work in multiple directions. This low-frequency micro-vibration absorber has a small volume and can perform low-frequency micro-vibration control in multiple directions, solving the micro-vibration problems of optical platforms and high-end laboratory platforms, and opening up a new idea for the design of broadband absorbers.

[0033] The setting of the locking mechanism can facilitate the user to replace the main spring with different stiffness coefficients, thereby reducing the use cost and being convenient for replacement. At the same time, it is also convenient for the installation and disassembly of the main spring without causing damage to the metal shell, and can also achieve a certain effect of vibration absorption. And the limit teeth 617 are preferably made of a flexible material that can deform under force.

[0034] The user only needs to rotate the main spring 400 to insert the arc-shaped slider 601 into the inside of the arc-shaped seat 603, and then fix the arc-shaped slider 601 by the cooperation of the limit plate 615 and the limit slot 614, thereby realizing the fixation of the main spring 400. At the same time, there are small gaps between the connections of each structure, and the gaps are also filled with the damping liquid 300, so the damping effect can also be achieved to realize vibration absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is the overall schematic diagram of the present application;

[0036] Figure 2 is the internal front view sectional schematic diagram of the present application;

[0037] Figure 3 is the connection schematic diagram of the locking mechanism and the main spring of the present application;

[0038] Figure 4 is the overall schematic diagram of the locking mechanism of the present application;

[0039] Figure 5 is the exploded schematic diagram of the locking mechanism of the present application;

[0040] Figure 6 is the schematic diagram of the T-shaped column, side spring and limit plate of the present application;

[0041] Figure 7 is the separation schematic diagram of the limit slot and the inner limit teeth of the present application;

[0042] Figure 8 is the schematic diagram of the vibration transmission curve of the absorber of the present application.

[0043] Reference numerals: 100, metal shell; 200, cover plate; 300, damping liquid;

[0044] 400, Main spring; 500, Steel ball;

[0045] 600, Locking mechanism; 601, Arc-shaped slider; 602, Notch; 603, Arc-shaped seat; 604, Upper cover; 605, T-shaped column; 606, Coupling shaft; 607, Rectangular hole;

[0046] 608, Installation groove; 609, Rotating sleeve; 610, Side spring; 611, Longitudinal spring; 612, Rectangular rod; 613, Ear plate; 614, Limit slot;

[0047] 615, Limit plate; 616, Inner limit tooth; 617, Limit tooth. Detailed implementation mode

[0048] The following will further describe the present application in detail with reference to the attached Figures 1-8 drawings.

[0049] The embodiment of the present application discloses a micro-vibration absorber.

[0050] Embodiment 1

[0051] Referring to Figure 1 , Figure 2 , Figure 8 , a micro-vibration absorber includes a metal shell 100 fixed on a platform. The metal shell 100 is set to be cylindrical, and the size of the metal shell 100 can be set according to actual needs. The bottom of the inner cavity of the metal shell 100 is fixedly arranged with the lower end of the main spring 400. The vertical and horizontal directions of the main spring 400 have the same natural vibration frequency as the vertical and horizontal directions of the metal shell 100. The upper end of the main spring 400 is fixedly provided with a steel ball 500 for vibration reduction. The lower surface of the steel ball 500 is located in the cavity in the middle of the main spring 400. There is a movable gap between the surface of the steel ball 500 and the outer side of the main spring 400 and the inner wall of the metal shell 100. The opening at the upper end of the metal shell 100 is fixed to the lower end of the cover plate 200. There is a movable space reserved between the lower end of the cover plate 200 and the steel ball 500. And the inside of the metal shell 100 is filled with a damping liquid 300 for damping. The damping liquid 300 is in a full state inside the metal shell 100 and contacts the cover plate 200, so that there is no air inside the metal shell 100. The damping liquid 300 is preferably silicone oil to improve the damping of the absorber and increase the bandwidth of vibration control. The steel ball 500 and the main spring 400 are both immersed in the damping liquid 300 to achieve vibration absorption.

[0052] The implementation principle of a micro-vibration absorber in an embodiment of this application is as follows: The metal housing 100 transmits the vibration force to the main spring 400. The main spring 400 drives the steel ball 500 to swing, thereby achieving the vibration absorption effect. The damping liquid 300 consumes the energy of the vibration of the steel ball 500 and the main spring 400 to achieve the vibration absorption effect. The gap between the main spring 400, the steel ball 500, and the metal housing 100 is filled with silicone oil as a damper. The vertical frequency of this vibration absorption device is controlled to be 2.5 Hz. The side stiffness of the metal housing 100 can be controlled to be consistent with the vertical frequency of the optical platform. The ultimate goal is to make the three-way frequencies of the vibration absorber consistent with the three-way frequencies of the optical platform. This vibration absorber can be used to solve the problem of three-dimensional vibration of the optical platform and high-end laboratories. This vibration absorber consists of a main spring 400, a steel ball 500, a damping liquid 300, and a metal housing 100 to form a mass-spring system. Among them, the mass-spring system has the same natural vibration frequency in the vertical and horizontal directions, and its frequency is equal to the vibration frequency to be controlled. Based on the stiffness characteristics of the spring-mass system, a linear vibration absorber for low-frequency micro-vibrations suitable for different structural platforms has been developed. Through the structural design of the vibration absorber and the optimization of the stiffness characteristics of the elastic elements, this vibration absorber has the characteristics of multi-directional vibration reduction; in order to further broaden the working frequency band of the vibration absorber, through linear mechanical characteristics, the natural vibration frequencies of the three directions of the vibration absorber system have been reduced, making it have better dynamic response ability and a wider working frequency band compared with traditional vibration absorbers.

[0053] By applying the stiffness characteristics of the spring-mass system, a low-frequency micro-vibration absorber has been developed, breaking through the structural size limitation of traditional vibration absorbers, achieving the control of the line spectrum vibration of the optical platform, and having the ability to work in multiple directions. This low-frequency micro-vibration absorber has a small volume, can perform low-frequency micro-vibration control in multiple directions, solves the micro-vibration problems of the optical platform and high-end laboratory platforms, and opens up a new idea for the design of broadband vibration absorbers.

[0054] Embodiment 2

[0055] Refer to Figures 3-7, the lower end of the main spring 400 is fixedly connected to the bottom of the metal housing 100 through a locking mechanism 600. The locking mechanism 600 can also play a role in shock absorption. There are small gaps between the various structural assemblies of the locking mechanism 600. The locking mechanism 600 includes an arc-shaped seat 603 fixedly arranged on one side of the bottom of the metal housing 100. The curvature of the arc-shaped seat 603 is the same as the curvature of the bent main spring 400. An arc-shaped slider 601 is movably inserted into the arc-shaped seat 603. One end of the arc-shaped slider 601 is fixedly arranged with the end of the lower end of the main spring 400. A strip-shaped notch 602 is opened in the middle and lower part of one side of the arc-shaped slider 601. A limiting tooth 617 is fixedly arranged in the middle of the surface of the notch 602. A number of limiting teeth 617 are provided. A rectangular installation groove 608 is opened on one side of the arc-shaped seat 603. The installation groove 608 communicates with the middle part of the arc-shaped seat 603. The middle part of the installation groove 608 is fixed to the lower end of the connecting shaft 606. A rotating sleeve 609 is sleeved and rotated on the surface of the connecting shaft 606. The top end of the connecting shaft 606 is located at two-thirds of the inside of the rotating sleeve 609. A limiting plate 615 is fixedly arranged on one side of the surface of the rotating sleeve 609. One end of the limiting plate 615 is clamped between two limiting teeth 617. The height of the limiting plate 615 is the same as the height of the limiting teeth 617. The length of the installation groove 608 is much larger than the length of the limiting plate 615. The limiting plate 615 is clamped and limited with the limiting teeth 617; when the limiting teeth 617 are clamped and limited with the limiting plate 615, the limiting plate 615 is in an inclined state. A side spring 610 is arranged in the middle of the surface of the limiting plate 615. One end of the side spring 610 is fixedly arranged on the inner wall of the installation groove 608. When the limiting teeth 617 are clamped with the limiting plate 615, the side spring 610 is in a stretched state.

[0056] Under normal conditions, one end of the limiting plate 615 protrudes from the installation groove 608 under the restriction of the limiting slot 614 and cannot rotate under the restriction of the rectangular rod 612. The user holds the main spring 400 and inserts one end of the arc-shaped slider 601 into the arc-shaped seat 603. As the arc-shaped slider 601 is inserted, the limiting teeth 617 will slide on one end of the limiting plate 615 and the end of the limiting plate 615 will squeeze the limiting teeth 617, causing the limiting teeth 617 to deform, facilitating the passage of one end of the limiting plate 615. Until one end of the arc-shaped slider 601 abuts against the end of the arc-shaped seat 603. At this time, the limiting teeth 617 will not be squeezed by the limiting plate 615 and return to their original state. The limiting plate 615 just abuts against the surface or root of the limiting teeth 617 to achieve limiting, preventing the arc-shaped slider 601 from sliding out of the arc-shaped seat 603. The limiting teeth 617 are preferably made of a flexible material that can deform under force.

[0057] Refer to Figures 3-7, the upper end of the arc-shaped seat 603 is welded to the lower end of the upper cover 604. A rectangular hole 607 is provided at the corresponding position on the surface of the upper cover 604 and the coupling shaft 606. A rectangular rod 612 is longitudinally slidably arranged in the rectangular hole 607. The surface of the rectangular rod 612 has a clearance fit with the inner wall of the rectangular hole 607. A T-shaped column 605 is fixedly provided at the upper end of the rectangular rod 612. There is a space for an external tool to be inserted between the head of the T-shaped column 605 and the upper end of the upper cover 604. Ear plates 613 are fixedly provided on both sides of the lower end of the rectangular rod 612. A longitudinal spring 611 is fixedly provided between the upper end of the ear plate 613 and the upper cover 604. The projected area of the longitudinal spring 611 is smaller than the projected area of the ear plate 613. A limit slot 614 is fixedly provided at the lower end of the rectangular rod 612. The structure of the limit slot 614 is as Figure 7 shown. Inner limit teeth 616 are provided on the inner wall at the upper one-third of the rotating sleeve 609. The inner limit teeth 616 are inserted and engaged with the limit slot 614 to achieve limitation.

[0058] When the main spring 400 needs to be disassembled, since the side spring 610 is always stretched, when the limit plate 615 loses its limitation, it retracts into the installation groove 608 under the reaction force of the side spring 610. The specific operation is as follows: The user inserts a fork-like tool between the head of the T-shaped column 605 and the upper cover 604, and then pulls it up. The T-shaped column 605 drives the rectangular rod 612, the ear plate 613 and the limit slot 614 to move upward, thereby compressing the longitudinal spring 611, and at the same time driving the limit slot 614 to separate from the rotating sleeve 609. At the same time, the limit slot 614 is separated from the inner limit teeth 616, so that the rotating sleeve 609 loses its limitation, and then the limit plate 615 rotates through the side spring 610, so that the arc-shaped slider 601 loses the limitation of the limit plate 615. Subsequently, the user can rotate the main spring 400 to remove the main spring 400.

[0059] It should be noted that the end of the limit plate 615 is a smooth surface. Due to being soaked in the damping liquid 300, the friction between the limit teeth 617 and the limit plate 615 is low, so it moves under the reaction force of the side spring 610.

[0060] Referring to Figures 3-7 , when the T-shaped column 605 is pulled up to the uppermost end, the limit slot 614 is completely separated from the inner limit teeth 616. Under normal conditions, the limit plate 615 stretches the side spring 610 and is limited by the limit slot 614, the inner limit teeth 616 and the rectangular rod 612 and the rectangular hole 607.

[0061] When moving the limit plate 615 and stretching the side spring 610, the user only needs to lift the T-shaped column 605 to make the rotating sleeve 609 in a free state, then hook the end of the limit plate 615 with a hook thin wire and pull it out and rotate it. Then release the T-shaped column 605 and the limitation is achieved through the engagement of the limit slot 614 and the inner limit teeth 616.

[0062] Symbol description: k is the stiffness of the vibration isolator, m is the mass of the vibration isolator, n is the number, M is the equivalent mass of the vibrating equipment, x1 is the displacement at the excitation end, x2 is the displacement of the vibration absorption system, ω is the frequency of the external interference signal. When this is the case, the equivalent mass of the entire system is less than zero. At this time, the system is in the equivalent negative mass state, and the vibration signal in this frequency range is attenuated. That is, the displacement ratio of the vibration transfer curve of the system is less than 1, which is the frequency range with vibration absorption effect.

[0063] Working principle:

[0064] When installing the main spring 400, the user only needs to rotate the main spring 400 so that the arc-shaped slider 601 is inserted into the arc-shaped seat 603, and then fix the arc-shaped slider 601 through the cooperation of the limit plate 615 and the limit slot 614, thereby realizing the fixation of the main spring 400. At the same time, there are small gaps between the connections of each structure, and the gaps are also filled with the damping liquid 300, so the damping effect can also be realized to achieve vibration absorption.

[0065] The above are only optional embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A micro-vibration absorber, characterized in that: It comprises a metal shell (100) fixed on a platform, a main spring (400) having the same natural frequency in the vertical and horizontal directions is fixedly arranged at the bottom of the inner cavity of the metal shell (100), a steel ball (500) for vibration reduction is fixedly arranged at the upper end of the main spring (400), and a movable gap is left between the outer sides of the steel ball (500) and the main spring (400) and the inner wall of the metal shell (100); A cover plate (200) is fixedly provided at the opening at the upper end of the metal shell (100), a movable space is reserved between the lower end of the cover plate (200) and the steel ball (500), and the interior of the metal shell (100) is filled with a damping liquid (300) for damping and is in contact with the cover plate (200), and the steel ball (500) and the main spring (400) are both immersed in the damping liquid (300) to achieve vibration absorption.

2. A micro-vibration absorber according to claim 1, characterized in that: The lower end of the main spring (400) is connected and fixed to the bottom of the metal shell (100) via a locking mechanism (600).

3. The micro-vibration absorber according to claim 2, characterized in that: The locking mechanism (600) comprises an arc-shaped seat (603) fixed to one side of the bottom of the metal housing (100), and an arc-shaped sliding block (601) fixed to the lower end of the main spring (400) is inserted into the arc-shaped seat (603).

4. The micro-vibration absorber according to claim 3, characterized in that: A notch (602) is provided at the lower middle portion of one side of the arc-shaped sliding block (601), and a limiting tooth (617) is fixedly provided at the middle portion of the surface of the notch (602).

5. The micro-vibration absorber according to claim 4, characterized in that: A mounting groove (608) communicating with the middle of the arc-shaped seat (603) is provided on one side of the arc-shaped seat (603); a connecting shaft (606) is fixedly provided in the middle of the mounting groove (608); a rotating sleeve (609) is sleeved on the surface of the connecting shaft (606); the top end of the connecting shaft (606) is located at two-thirds of the interior of the rotating sleeve (609); a limiting plate (615) is fixedly provided on one side of the surface of the rotating sleeve (609) for clamping and limiting with the limiting teeth (617); When the limiting teeth (617) are engaged with the limiting plate (615) for limiting, the limiting plate (615) is in an inclined state.

6. The micro-vibration absorber according to claim 5, characterized in that: A side spring (610) is fixedly provided between the middle portion of the surface of the limiting plate (615) and the inner wall of the mounting groove (608); When the limiting tooth (617) is engaged with the limiting plate (615), the side spring (610) is in a stretched state.

7. The micro-vibration absorber according to claim 6, characterized in that: An upper cover (604) is fixedly provided at the upper end of the arc-shaped seat (603); a rectangular hole (607) is provided on the surface of the upper cover (604) at a position corresponding to the connecting shaft (606); a rectangular rod (612) is longitudinally slidably provided in the rectangular hole (607); and a T-shaped column (605) is fixedly provided at the upper end of the rectangular rod (612).

8. The micro-vibration absorber according to claim 7, characterized in that: Ear plates (613) are fixedly provided on both sides of the lower end of the rectangular rod (612), and a longitudinal spring (611) is fixedly provided between the upper end of the ear plate (613) and the upper cover (604).

9. The micro-vibration absorber according to claim 8, characterized in that: A limiting slot (614) is fixedly provided at the lower end of the rectangular rod (612), and an inner wall at the upper third of the rotating sleeve (609) is provided with an inner limiting tooth (616) that is plugged and meshed with the limiting slot (614).

10. The micro-vibration absorber according to claim 9, characterized in that: When the T-shaped column (605) is pulled upward to the uppermost end, the limiting slot (614) is completely separated from the inner limiting tooth (616). Under normal conditions, the limiting plate (615) stretches the side spring (610) through the limiting slot (614), the inner limiting tooth (616), and the rectangular rod (612) and the rectangular hole (607).

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