Micro-vibration absorber

Abstract

The micro-vibration absorber comprises a metal shell fixed to a platform, main springs with the same natural vibration frequency in the vertical direction and the horizontal direction are fixedly arranged at the bottom of an inner cavity of the metal shell, and steel balls used for vibration reduction are fixedly arranged at the upper ends of the main springs; movable gaps are reserved between the outer sides of the steel ball and the main spring and the inner wall of the metal shell; a cover plate is fixedly arranged at an opening in the upper end of the metal shell, a moving space is reserved between the lower end of the cover plate and the steel ball, the metal shell is filled with damping liquid used for damping and makes contact with the cover plate, the steel ball and the main spring are both immersed in the damping liquid to achieve vibration absorption, and the limitation of the structural size of a traditional vibration absorber is broken through; the low-frequency micro-vibration absorber has the advantages that optical platform line spectrum vibration control is achieved, the multi-direction working capacity is achieved, the low-frequency micro-vibration absorber is small in size, multi-direction low-frequency micro-vibration control is achieved, and the micro-vibration problem of an optical platform and a high-end laboratory platform is solved.

Description

Technical Field

[0001] The present application relates to the field of vibration dampers, and in particular to a micro-vibration absorber. Background Art

[0002] With the continuous development of modern science and technology, the requirements for performance indicators such as accuracy, resolution and stability of precision instruments are constantly increasing, and more stringent requirements are put forward for reducing micro-vibrations in the working environment, especially low-frequency micro-vibrations. At present, due to the particularity of their working conditions in the fields of aerospace, precision machinery manufacturing, high-end laboratories, optical platforms, and automotive damping and vibration control, strict requirements are put forward for the means and methods of vibration control. The commonly used micro-vibration control methods can be divided into active control, semi-active control and passive control. Generally, low-frequency micro-vibration control is carried out through active and semi-active control technologies, and high-frequency micro-vibration control is carried out through passive control technologies. Due to the low damping in the working environment of some precision instruments (such as semiconductor equipment environment), long-lasting micro-vibrations will be generated. These micro-vibrations will gradually couple to form a micro-vibration environment covering a wide frequency and complex components, making it impossible for precision instruments to work normally. This situation requires higher vibration control and requires micro-vibration control of multiple complex frequencies. In the experimental environment, the use of active and semi-active control technology can achieve good control effects on low-frequency micro-vibrations. However, some precision instrument installation environments are difficult to provide active conditions, and at the same time, higher requirements are placed on the stability of vibration control equipment. Therefore, under the constraints of actual engineering conditions, passive methods have become the preferred vibration control method due to their high stability and the lack of energy input. However, controlling low-frequency micro-vibrations through passive methods is still a difficult problem.

[0003] As an additional system installed on the vibration device, the vibration absorber can control the line spectrum vibration problem of such vibration devices. However, traditional vibration absorbers are often large in size and have space limitations, so it is necessary to develop a low-frequency micro-vibration absorber that meets the requirements in terms of size and material.

[0004] Traditional vibration absorbers can generally only control line spectrum vibrations. 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 is significantly reduced. Many scholars have conducted a lot of relevant research to broaden the working frequency of the vibration absorber, but most of them are based on the principle of local resonance to improve the design of the vibration absorber. Usually, multiple vibration absorbers with different working frequencies are used or the structural parameters of the vibration absorber are improved to make it have multiple vibration modes to control vibration signals of more frequencies. It should be pointed out that the vibration absorber designed based on the principle of local resonance is usually only partially in working state for each specific frequency vibration signal in the broadband, and there are many limitations. The traditional vibration absorber module is mainly composed of mass units and elastic units. The vibration of the main system at this frequency is transferred through the energy dissipation of the vibration absorber unit at the natural frequency. Therefore, dynamic vibration absorbers are generally used to control line spectrum vibrations of specific frequencies. In order to use vibration absorbers to achieve vibration control of broadband signals, multiple or distributed vibration absorbers are often used to suppress structural vibrations. Therefore, the existing vibration absorbers have poor vibration reduction effects in the three-dimensional vibration of optical platforms and high-end laboratories. Summary of the invention

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

[0006] The micro-vibration absorber provided in this application adopts the following technical solution: A micro-vibration absorber, comprising a metal shell fixed on a platform, a main spring with the same natural frequency in the vertical and horizontal directions is fixed at the bottom of the inner cavity of the metal shell, a steel ball for vibration reduction is fixed at the upper end of the main spring, and a movable gap is left between the steel ball and the outer side of the main spring and the inner wall of the metal shell; A cover plate is fixedly provided at the opening at the upper end of the metal shell, and a movable space is reserved between the lower end of the cover plate and the steel ball. The interior of the metal shell is filled with damping fluid for damping and contacts the cover plate, and the steel ball and the main spring are immersed in the damping fluid to achieve vibration absorption.

[0007] By adopting the above technical scheme, the vibration absorber is composed of a mass-spring system consisting of a main spring, a steel ball, a damping fluid, and a metal shell, wherein the mass-spring system has the same natural frequency in the vertical and horizontal directions, and its frequency is equal to the controlled vibration frequency. By applying the stiffness characteristics of the spring-mass system, a low-frequency micro-vibration absorber is developed, which breaks through the size limitation of the traditional vibration absorber structure, realizes the line spectrum vibration control of the optical platform, and has the ability to work in multiple directions. The low-frequency micro-vibration absorber has a small volume and can perform low-frequency micro-vibration control in multiple directions, solving the micro-vibration problem of optical platforms and high-end laboratory platforms.

[0008] Preferably, the lower end of the main spring is connected and fixed to the bottom of the metal shell via a locking mechanism.

[0009] By adopting the above technical solution, the setting of the locking mechanism can facilitate the user to replace the main spring with different spring coefficients, thereby reducing the cost of use and facilitating 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 vibration absorption effect.

[0010] Preferably, the locking mechanism comprises an arc-shaped seat fixed to one side of the bottom of the metal shell, and an arc-shaped slider fixed to the lower end of the main spring is inserted into the arc-shaped seat.

[0011] 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 are integrated, which is beneficial to the transmission of vibration.

[0012] Preferably, a notch is provided at a lower middle portion of one side of the arc-shaped sliding block, and a limiting tooth is fixedly provided at a middle portion of a surface of the notch.

[0013] By adopting the above technical solution, the surface of the notch is set to be smooth, and the limiting teeth can be embedded in the arc-shaped slider to improve the stability of the connection of the limiting teeth. At the same time, the limiting teeth can limit the limiting plate.

[0014] Preferably, a mounting groove connected to the middle of the arc-shaped seat is provided on one side of the arc-shaped seat, a connecting shaft is fixedly provided in the middle of the mounting 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 that is engaged with the limiting tooth and limited is fixedly provided on one side of the rotating sleeve surface; When the limiting teeth are engaged with the limiting plate for limiting position, the limiting plate is in an inclined state.

[0015] By adopting the above technical solution, the rotating sleeve will rotate on the connecting shaft, and the connecting shaft can achieve a supporting effect on the rotating sleeve. At the same time, the limit plate and the rotating sleeve are integrally formed, and the installation groove can store the limit plate.

[0016] Preferably, a side spring is fixedly provided between the middle portion of the surface of the limiting plate and the inner wall of the installation groove; When the limiting tooth is engaged with the limiting plate, the side spring is in a stretched state.

[0017] By adopting the above technical solution, the compression path of the side spring is on the rotation path of the limit plate, thereby avoiding irregular bending of the side spring and causing accelerated damage. At the same time, the side spring can pull the limit plate into the installation groove.

[0018] Preferably, an upper cover is fixedly provided on the upper end of the arc-shaped seat, a rectangular hole is opened on the surface of the upper cover at a position corresponding to the connecting shaft, a rectangular rod is longitudinally slidably arranged in the rectangular hole, and a T-shaped column is fixedly provided on the upper end of the rectangular rod.

[0019] By adopting the above technical solution, the upper cover is set to limit the arc-shaped slider to prevent it from leaving the arc-shaped seat, and the rectangular hole limits the rectangular rod to prevent it from rotating.

[0020] Preferably, ear plates are fixedly provided on both sides of the lower end of the rectangular rod, and a longitudinal spring is fixedly provided between the upper ends of the ear plates and the upper cover.

[0021] By adopting the above technical solution, the ear plate supports the longitudinal spring, and the reaction force of the longitudinal spring can enable the limiting slot to be inserted into the interior of the rotating sleeve and engage with the internal limiting tooth for limiting.

[0022] Preferably, a limiting slot is fixedly provided at the lower end of the rectangular rod, and an inner wall at the upper third of the rotating sleeve is provided with an inner limiting tooth which is plugged and engaged with the limiting slot.

[0023] By adopting the above technical solution, the limiting slot can limit the rotation of the inner limiting tooth and thus limit the rotation of the rotating sleeve.

[0024] Preferably, when the T-shaped column is pulled upward to the uppermost end, the limit slot is completely separated from the inner limit tooth. Under normal circumstances, the limit plate tension side spring is limited by the limit slot, the inner limit tooth, and the rectangular rod and the rectangular hole.

[0025] By adopting the above technical solution, the limit plate can be released and the arc-shaped slider can be taken out. At the same time, the limit plate can be pulled out of the installation groove, so that the limit plate is in an inclined state and the limit tooth can be engaged with the limit plate again.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: The metal shell transmits the vibration force to the main spring, and the main spring drives the steel ball to swing to achieve the vibration absorption effect. The damping fluid consumes the energy of the vibration of the steel ball and the main spring to achieve the vibration absorption effect. The gap between the main spring, the steel ball and the metal shell is filled with silicone oil to act as damping. Since the side stiffness of the metal shell can be controlled to be consistent with the vertical frequency, the vibration absorber is composed of a main spring, a steel ball, a damping fluid, and a metal shell to form a mass-spring system, wherein the mass-spring system has the same natural frequency in the vertical and horizontal directions, and its frequency is equal to the controlled vibration frequency. Through the structural design of the vibration absorber and the optimization of the stiffness characteristics of the elastic element, the vibration absorber has the characteristics of multi-directional vibration reduction. In order to further widen the working frequency band of the vibration absorber, the natural frequency of the vibration absorber system in three directions is reduced through linear mechanical characteristics, so that it has better dynamic response capability and a wider working frequency band than traditional vibration absorbers.

[0027] By applying the stiffness characteristics of the spring-mass system, a low-frequency micro-vibration absorber was developed, which broke through the size limit of the traditional absorber structure, realized the line spectrum vibration control of the optical platform, and had the ability to work in multiple directions. The low-frequency micro-vibration absorber has a small volume and can control low-frequency micro-vibrations in multiple directions, solving the micro-vibration problem of optical platforms and high-end laboratory platforms, and opening up new ideas for the design of broadband absorbers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall schematic diagram of this application; Figure 2 It is a schematic diagram of the internal front cross-sectional view of the present application; Figure 3 This is a schematic diagram of the connection between the locking mechanism and the main spring of the present application; Figure 4 This is an overall schematic diagram of the locking mechanism of this application; Figure 5 This is an exploded schematic diagram of the locking mechanism of the present application; Figure 6 This is a schematic diagram of the T-shaped column, side spring and limit plate of the present application; Figure 7 This is a schematic diagram of the separation of the limiting slot and the inner limiting tooth of the present application; Figure 8 Schematic diagram of the vibration transfer curve of the vibration absorber of the present application.

[0029] Reference numerals: 100, metal housing; 200, cover plate; 300, damping fluid; 400, main spring; 500, steel ball; 600, locking mechanism; 601, arc-shaped slider; 602, missing groove; 603, arc-shaped seat; 604, upper cover; 605, T-shaped column; 606, connecting shaft; 607, rectangular hole; 608, mounting groove; 609, rotating sleeve; 610, side spring; 611, longitudinal spring; 612, rectangular rod; 613, ear plate; 614, limit slot; 615, limit plate; 616, inner limit tooth; 617, limit tooth. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-Figure 8 This application is described in further detail.

[0031] The embodiment of the present application discloses a micro-vibration absorber.

[0032] Example 1 Reference Figure 1 , Figure 2 , Figure 8A 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 fixed to the lower end of the main spring 400, the vertical and horizontal directions of the main spring 400 have the same natural frequency as the vertical and horizontal directions of the metal shell 100, the upper end of the main spring 400 is fixed 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, and the surface of the steel ball 500 and the outer side of the main spring 400 are both in contact with the metal shell A movable gap is left between the inner walls of 100, the opening at the upper end of the metal shell 100 is fixed to the lower end of the cover plate 200, and 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. The damping liquid 300 is filled inside the metal shell 100 and contacts with the cover plate 200, so that there is no air inside the metal shell 100. The damping liquid 300 is preferably silicone oil for improving the damping of the vibration absorber and increasing 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.

[0033] The implementation principle of a micro-vibration absorber in the embodiment of the present application is as follows: the metal shell 100 transmits the vibration force to the main spring 400, the main spring 400 drives the steel ball 500 to swing and thus achieves 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 main spring 400, the steel ball 500, and the gap between the metal shell 100 are filled with silicone oil to act as a damper, the vertical frequency of the vibration absorption device is controlled to be 2.5Hz, the side stiffness of the metal shell 100 can be controlled to be consistent with the vertical frequency of the optical platform, and the ultimate goal is to make the three-dimensional frequency of the vibration absorber consistent with the three-dimensional frequency of the optical platform. The vibration absorber can be used to solve the problem of three-dimensional vibration of optical platforms and high-end laboratories. The vibration absorber is composed of a main spring 400, a steel ball 500, a damping fluid 300, and a metal shell 100 to form a mass-spring system, wherein the mass-spring system has the same natural frequency in the vertical and horizontal directions, and its frequency is equal to the controlled vibration frequency. Based on the stiffness characteristics of the spring-mass system, a linear vibration absorber with low-frequency micro-vibration suitable for different structural platforms is developed. Through the structural design of the vibration absorber and the optimization of the stiffness characteristics of the elastic element, the vibration absorber has the characteristics of multi-directional vibration reduction. In order to further widen the working frequency band of the vibration absorber, the natural frequencies of the vibration absorber system in three directions are reduced through linear mechanical characteristics, so that compared with traditional vibration absorbers, it has better dynamic response capability and a wider working frequency band.

[0034] By applying the stiffness characteristics of the spring-mass system, a low-frequency micro-vibration absorber was developed, which broke through the size limit of the traditional absorber structure, realized the line spectrum vibration control of the optical platform, and had the ability to work in multiple directions. The low-frequency micro-vibration absorber has a small volume and can control low-frequency micro-vibrations in multiple directions, solving the micro-vibration problem of optical platforms and high-end laboratory platforms, and opening up new ideas for the design of broadband absorbers.

[0035] Example 2 Reference Figure 3-Figure 7 The lower end of the main spring 400 is connected and fixed to the bottom of the metal shell 100 by a locking mechanism 600. The locking mechanism 600 can also play a role in vibration reduction. There is a small gap between the various structural assemblies of the locking mechanism 600. The locking mechanism 600 includes an arc seat 603 fixed to one side of the bottom of the metal shell 100. The curvature of the arc seat 603 is the same as the curvature of the bending of the main spring 400. An arc slider 601 is movably inserted inside the arc seat 603. One end of the arc slider 601 is fixed to the end of the lower end of the main spring 400. A strip-shaped notch 602 is provided in the middle and lower part of one side of the arc slider 601. A limiting tooth 617 is fixed in the middle of the surface of the notch 602. A plurality of limiting teeth 617 are provided. A rectangular mounting groove 608 is provided on one side of the arc seat 603. The mounting groove 608 and the middle of the arc seat 603 are connected. The connecting shaft 606 is connected, the middle part of the mounting groove 608 is fixed to the lower end of the connecting shaft 606, a rotating sleeve 609 is rotatably sleeved on the surface of the connecting shaft 606, the top of the connecting shaft 606 is located at two-thirds of the inside of the rotating sleeve 609, a limiting plate 615 is fixed 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 mounting groove 608 is much larger than the length of the limiting plate 615, and the limiting plate 615 is clamped with the limiting teeth 617 for limiting; when the limiting teeth 617 are clamped with the limiting plate 615 for limiting, the limiting plate 615 is in an inclined state, a side spring 610 is provided in the middle part of the surface of the limiting plate 615, one end of the side spring 610 is fixed to the inner wall of the mounting groove 608, and when the limiting teeth 617 are clamped with the limiting plate 615, the side spring 610 is in a stretched state.

[0036] Under normal circumstances, the limit plate 615 is restricted by the limit slot 614, and one end of the limit plate 615 protrudes from the installation slot 608 and cannot rotate under the restriction of the rectangular rod 612. The user holds the main spring 400 to insert one end of the arc-shaped slider 601 into the arc seat 603. As the arc-shaped slider 601 is inserted, the limit tooth 617 will slide on one end of the limit plate 615 and the end of the limit plate 615 will squeeze the limit tooth 617, causing the limit tooth 617 to deform, facilitating the passage of one end of the limit plate 615 until one end of the arc-shaped slider 601 abuts against the end of the arc seat 603. At this time, the limit tooth 617 will not be squeezed by the limit plate 615 to restore to its original state. The limit plate 615 just abuts against the surface or root of the limit tooth 617 to achieve limitation, thereby preventing the arc-shaped slider 601 from sliding out of the arc seat 603. The limit tooth 617 is preferably made of a flexible material that can be deformed under force.

[0037] Reference Figure 3-Figure 7 The upper end of the arc seat 603 is welded to the lower end of the upper cover 604, and a rectangular hole 607 is opened at a position corresponding to the surface of the upper cover 604 and the connecting shaft 606. A rectangular rod 612 is longitudinally slidably arranged in the rectangular hole 607, and the surface of the rectangular rod 612 is gap-matched with the inner wall of the rectangular hole 607. A T-shaped column 605 is fixedly arranged on the upper end of the rectangular rod 612, and a space for inserting external tools is arranged between the head of the T-shaped column 605 and the upper end of the upper cover 604. Ear plates 613 are fixedly arranged on both sides of the lower end of the rectangular rod 612, and a longitudinal spring 611 is fixedly arranged between the upper end of the ear plate 613 and the upper cover 604. The projection area of ​​the longitudinal spring 611 is smaller than the projection area of ​​the ear plate 613. A limiting slot 614 is fixedly arranged at the lower end of the rectangular rod 612, and the structure of the limiting slot 614 is as shown in FIG. Figure 7 As shown, the inner wall of the upper third of the rotating sleeve 609 is provided with an inner limiting tooth 616, and the inner limiting tooth 616 is plugged and meshed with the limiting slot 614 to achieve limiting.

[0038] When the main spring 400 needs to be disassembled, since the side spring 610 is always stretched, when the limit plate 615 loses its restriction, it is recovered to the inside of the installation groove 608 under the reaction force of the side spring 610. The specific operation is: 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 upward. 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 driving the limit slot 614 to separate from the inside of the rotating sleeve 609. At the same time, the limit slot 614 is separated from the inner limit tooth 616, so that the rotating sleeve 609 loses its restriction, and then the limit plate 615 is rotated through the side spring 610, so that the arc slider 601 loses the restriction of the limit plate 615. Then, the user rotates the main spring 400 to remove the main spring 400.

[0039] It should be noted that the end of the limit plate 615 is set to a smooth surface. Due to the immersion of the damping fluid 300, the friction between the limit tooth 617 and the limit plate 615 is low, and then it moves under the reaction force of the side spring 610.

[0040] Reference Figure 3-Figure 7 When the T-shaped column 605 is pulled upward to the uppermost end, the limit slot 614 is completely separated from the inner limit tooth 616. Under normal circumstances, the limit plate 615 stretches the side spring 610 through the limit slot 614, the inner limit tooth 616, and the rectangular rod 612 and the rectangular hole 607.

[0041] When moving the limit plate 615 and stretching the opposite 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 the hook filament and pull it out to rotate, and then release the T-shaped column 605 to engage with the inner limit tooth 616 through the limit slot 614 to achieve limitation.

[0042] Explanation of symbols: k is the stiffness of the isolator, m is the mass of the isolator, n is the number of isolators, M is the equivalent mass of the vibration device, x1 is the displacement of the excitation end, x2 is the displacement of the vibration absorption system, ω is the frequency of the external interference signal, When , the equivalent mass of the entire system is less than zero. At this time, the system is in an 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.

[0043] Working principle: When installing the main spring 400, the user only needs to rotate the main spring 400 to insert the arc-shaped slider 601 into the arc-shaped seat 603, and then fix the arc-shaped slider 601 through the cooperation of the limiting plate 615 and the limiting slot 614, thereby fixing the main spring 400. At the same time, there are small gaps between the various structural connections, and the gaps are also filled with the damping fluid 300, so the damping effect can also be achieved to achieve vibration absorption.

[0044] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in 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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