A vibration isolator with magnetic power quasi-zero stiffness criterion

Abstract

The utility model relates to the technical field of vibration isolation, and specifically relates to a vibration isolator with magnetic power quasi-zero stiffness criterion, which comprises a steel top plate and a steel bottom plate, the steel top plate and the steel bottom plate are connected through vertical compression springs, a magnetic rubber cylinder sleeve is arranged on the outer side, and a magnetic power quasi-zero stiffness system is arranged in the middle; the system comprises an upper steel plate and a bottom steel plate, three permanent magnets are placed between the two steel plates, transverse tension springs are installed on the two sides of the permanent magnets, and the springs are connected to the upper steel plate and the bottom steel plate of the system through L-shaped hinge steel connecting plates and high-rigidity steel bars. The above structure design can dynamically adjust the stiffness through the combination of magnetic power and springs to adapt to different vibration frequencies, effectively improves the energy conversion efficiency and the damping effect, reduces mechanical wear, prolongs the service life of the vibration isolator, and significantly reduces the frequency and cost of maintenance.

Description

Technical Field

[0001] This utility model relates to a quasi-zero stiffness vibration isolator, specifically a vibration isolator with a magnetic dynamic quasi-zero stiffness criterion, belonging to the field of vibration isolation technology. Background Technology

[0002] With the continuous advancement of science and technology, the requirements for vibration environment in high-precision instruments in laboratories and sensitive medical equipment in hospitals are becoming increasingly stringent. Vibration not only affects the accuracy and stability of instruments but can also adversely impact the normal operation of medical equipment and patient recovery, especially low-frequency and high-frequency vibrations. Therefore, employing advanced vibration isolation technology to isolate external vibrations and protect instruments and equipment from vibration interference has become a crucial issue that urgently needs to be addressed in these fields.

[0003] However, in the current field of vibration isolation technology, most commonly used vibration isolators rely on fixed structures such as rubber, hydraulic pressure, or springs. Their vibration isolation performance often degrades due to material aging, the increased structural complexity makes maintenance difficult, and their frequency adaptability is limited, making it difficult to effectively isolate complex and variable vibrations. In addition, long-term vibration can easily cause wear between mechanical components, affecting the stability and service life of the vibration isolator, posing a challenge to equipment protection and performance assurance in practical applications. Utility Model Content

[0004] The purpose of this invention is to provide a vibration isolator with a quasi-zero stiffness criterion for magnetic dynamics in order to solve the above problems. It can dynamically adjust the stiffness through the combination of magnetic force and spring to adapt to different vibration frequencies, effectively improving energy conversion efficiency and vibration reduction effect, while reducing mechanical wear, extending the service life of the vibration isolator, and significantly reducing the frequency and cost of maintenance.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a vibration isolator with a magnetic dynamic quasi-zero stiffness criterion, comprising a steel top plate and a steel bottom plate, characterized in that: the steel top plate and the steel bottom plate are connected by a vertical compression spring, a magnetically shielding rubber sleeve is provided on the outer side, and a magnetic dynamic quasi-zero stiffness system is installed in the middle; the dynamic quasi-zero stiffness system includes an upper steel plate and a lower steel plate, three permanent magnets are placed between the upper steel plate and the lower steel plate, and a transverse tension auxiliary spring and a tension main spring are installed on both sides of the permanent magnets; the tension auxiliary spring and the tension main spring are connected to the upper steel plate and the lower steel plate of the magnetic dynamic quasi-zero stiffness system by a high-stiffness steel strip using an L-shaped hinged steel connecting plate.

[0006] Preferably, there are four vertical compression springs, which are evenly distributed at the four corners between the steel top plate and the steel bottom plate. The steel top plate is provided with fixing screws, and the steel bottom plate is provided with vibration damping rubber pads at the bottom of the springs.

[0007] Preferably, the magnetic shielding rubber sleeve surrounds and is tightly attached to the outside of the steel top plate, the steel bottom plate, and the vertical compression spring.

[0008] Preferably, the magnetic quasi-zero stiffness system is located in the central region between the steel top plate and the steel bottom plate, and the bottom plate is provided with a corresponding bottom steel plate vibration damping rubber pad.

[0009] Preferably, the three permanent magnets in the magnetic quasi-zero stiffness system are specifically arranged from top to bottom, and the magnetic pole directions of all permanent magnets are uniformly N at the top and S at the bottom.

[0010] Preferably, each of the three permanent magnets is equipped with a lateral tension auxiliary spring and a tension main spring on both sides, wherein the permanent magnets located at the upper and lower ends are equipped with tension auxiliary springs, and the permanent magnet located in the middle is equipped with a tension main spring.

[0011] Preferably, the L-shaped hinged steel connecting plates are fixed to the edges of the upper steel plate and the lower steel plate respectively, and each L-shaped hinged steel connecting plate is connected to the corresponding tension auxiliary spring and tension main spring through a high-rigidity steel strip.

[0012] The beneficial effects of this invention are as follows: When high-precision laboratory instruments are in a vibrating environment, after installing this vibration isolator with a magnetic quasi-zero stiffness criterion, the vibration is first received by the steel top plate and transmitted to the vertical compression spring and the magnetically shielding rubber sleeve. Both provide positive stiffness to initially buffer the vibration. Subsequently, the vibration energy is further transmitted to the magnetic quasi-zero stiffness system. In this system, the magnetic force between the permanent magnets generates negative stiffness, which cancels out the positive stiffness, achieving a quasi-zero stiffness state and effectively isolating the vibration. During vibration, the relative displacement between the permanent magnets activates the transverse tension spring, especially the main tension spring, increasing its elastic potential energy and converting the vibration energy into the potential energy stored in the spring. Furthermore, the magnetic interaction between the permanent magnets and the surrounding environment, as well as the movement of the L-shaped hinged steel connecting plate, also convert some of the vibration energy into heat energy for dissipation. Through the combined effect of this series of internal operations, the vibration energy transmitted to the instrument itself is significantly reduced, ensuring the high-precision instrument operates in a stable environment. Simultaneously, mechanical wear is reduced, extending the service life of the vibration isolator and significantly reducing its maintenance frequency and cost. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0015] Figure 3 This is a schematic diagram of the magnetic quasi-zero stiffness system of this utility model;

[0016] Figure 4This is a schematic diagram of the connection structure between the upper steel plate and the lower steel plate of this utility model;

[0017] Figure 5 This is a schematic diagram of the installation of the steel roof plate of this utility model;

[0018] Figure 6 This is a schematic diagram of the installation of the steel base plate of this utility model.

[0019] In the diagram: 1. Steel top plate; 101. Fixing screw; 2. Compression spring; 3. Steel bottom plate; 301. Vibration damping rubber pad at the bottom of the spring; 302. Vibration damping rubber pad on the bottom steel plate; 4. Magnetic shielding rubber sleeve;

[0020] 5. Magnetic quasi-zero stiffness system; 501. Upper steel plate; 502. Bottom steel plate; 503. Connecting plate to upper / bottom L-shaped hinged steel support; 504. Tension auxiliary spring; 505. Tension main spring; 506. Permanent magnet; 507. High stiffness steel bar. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6 As shown, a vibration isolator with a magnetic quasi-zero stiffness criterion includes a steel top plate 1 and a steel bottom plate 3. The steel top plate 1 and the steel bottom plate 3 are connected by a vertical compression spring 2. A magnetic shielding rubber sleeve 4 is provided on the outside, and a magnetic quasi-zero stiffness system 5 is installed in the middle. The magnetic quasi-zero stiffness system 5 includes an upper steel plate 501 and a lower steel plate 502. Three permanent magnets 506 are placed between the upper steel plate 501 and the lower steel plate 502. A transverse tension auxiliary spring 504 and a tension main spring 505 are installed on both sides of the permanent magnets 506. The tension auxiliary spring 504 and the tension main spring 505 are connected to the upper steel plate 501 and the lower steel plate 502 of the magnetic quasi-zero stiffness system 5 by an L-shaped hinged steel connecting plate 503 and a high-stiffness steel strip 507.

[0023] As a technical optimization of this utility model, the number of vertical compression springs 2 is four, and they are evenly distributed in the four corners between the steel top plate 1 and the steel bottom plate 3. The steel top plate 1 is provided with a fixing screw 101, and the steel bottom plate 3 is provided with a spring bottom damping rubber pad 301. This ensures the stability of the vibration isolator structure and the effective dispersion of vibration energy. The positive stiffness of the compression springs 2 provides key support for the initial buffering of vibration.

[0024] As a technical optimization of this utility model, the magnetic shielding rubber sleeve 4 surrounds and closely adheres to the outside of the steel top plate 1, the steel bottom plate 3, and the vertical compression spring 2; thereby facilitating the provision of positive stiffness, isolating external magnetic field interference, and protecting the working environment of the internal magnetic dynamic quasi-zero stiffness system 5.

[0025] As a technical optimization of this utility model, the magnetic quasi-zero stiffness system 5 is located in the central area between the steel top plate 1 and the steel bottom plate 3, and the steel bottom plate 3 is correspondingly provided with a bottom steel plate vibration damping rubber pad 302; the three permanent magnets 506 in the system 5 are specifically arranged from top to bottom, with the magnetic pole directions uniformly being N at the top and S at the bottom, which facilitates providing most of the negative stiffness and increasing the amplitude of the negative stiffness range; both sides of the permanent magnet 506 are equipped with a transverse tension auxiliary spring 504 and a tension main spring 505, wherein the permanent magnets 506 located at the top and bottom ends are equipped with tension auxiliary springs 504, which provide a small part of the negative stiffness and improve structural stability, while the permanent magnet 506 located in the middle is equipped with a tension main spring 505, which provides most of the negative stiffness; the L-shaped hinged steel connecting plates 503 are respectively fixed to the upper steel The edges of plate 501 and bottom steel plate 502, and each L-shaped hinged steel connecting plate 503 are connected to the corresponding tension auxiliary spring 504 and tension main spring 505 through high-rigidity steel strip 507; thus, when in a vibration environment, the magnetic force between permanent magnets 506 generates negative stiffness, which cancels out the positive stiffness generated by compression spring 2 and magnetic shielding rubber sleeve 4, achieving a quasi-zero stiffness state and effectively isolating vibration; at the same time, the elastic potential energy of the tension main spring between permanent magnets 506 increases, converting vibration energy into spring potential energy for storage; the magnetic interaction between permanent magnets 506 and the surrounding environment and the movement of L-shaped hinged steel connecting plates 503 also convert some vibration energy into heat energy for dissipation, effectively improving energy conversion efficiency and vibration reduction effect, reducing mechanical wear, extending the service life of the vibration isolator and the interval between maintenance.

[0026] When this utility model is in use, if a high-precision laboratory instrument is in a vibrating environment, after installing this vibration isolator with a magnetic quasi-zero stiffness criterion, the vibration is first received by the steel top plate 1 and transmitted to the vertical compression spring 2 and the magnetically shielding rubber sleeve 4. The two together provide positive stiffness to initially buffer the vibration. Subsequently, the vibration energy is further transmitted to the magnetic quasi-zero stiffness system 5. In this system, the magnetic force between the permanent magnets 506 generates negative stiffness, which cancels out the positive stiffness, achieving a quasi-zero stiffness state and effectively isolating the vibration. During the vibration process, the relative displacement between the permanent magnets 506 activates the transverse tension spring 504, especially the tension main spring 505, which increases its elastic potential energy and converts the vibration energy into the potential energy of the spring for storage. Moreover, the magnetic interaction between the permanent magnets 506 and the surrounding environment and the movement of the L-shaped hinged steel connecting plate 503 also convert some of the vibration energy into heat energy for dissipation. This series of internal operations work together to significantly reduce the vibration energy transmitted to the instrument itself, ensuring that the high-precision instrument operates in a stable environment. At the same time, it reduces mechanical wear, extends the service life of the vibration isolator, and significantly reduces the frequency and cost of its maintenance.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vibration isolator with a quasi-zero stiffness criterion, comprising a steel top plate (1) and a steel bottom plate (3), characterized in that: The steel top plate (1) and the steel bottom plate (3) are connected by a vertical compression spring (2), and a magnetic shielding rubber sleeve (4) is provided on the outside. A magnetic dynamic quasi-zero stiffness system (5) is installed in the middle. The dynamic quasi-zero stiffness system (5) includes an upper steel plate (501) and a bottom steel plate (502). Three permanent magnets (506) are placed between the upper steel plate (501) and the bottom steel plate (502). A transverse tension auxiliary spring (504) and a tension main spring (505) are installed on both sides of the permanent magnets (506). The tension auxiliary spring (504) and the tension main spring (505) are connected to the upper steel plate (501) and the bottom steel plate (502) of the magnetic dynamic quasi-zero stiffness system (5) by a high-stiffness steel strip (507) using an L-shaped hinged steel connecting plate (503).

2. A vibration isolator with a quasi-zero stiffness criterion according to claim 1, characterized in that: The number of vertical compression springs (2) is four, and they are evenly distributed in the four corners between the steel top plate (1) and the steel bottom plate (3). The steel top plate (1) is provided with a fixing screw (101), and the steel bottom plate (3) is provided with a spring bottom damping rubber pad (301).

3. A vibration isolator with a quasi-zero stiffness criterion according to claim 1, characterized in that: The magnetic shielding rubber sleeve (4) surrounds and adheres tightly to the outside of the steel top plate (1), the steel bottom plate (3), and the vertical compression spring (2).

4. A vibration isolator with a quasi-zero stiffness criterion according to claim 1, characterized in that: The magnetic quasi-zero stiffness system (5) is located in the central area between the steel top plate (1) and the steel bottom plate (3), and the bottom steel plate (3) is provided with a bottom steel plate vibration damping rubber pad (302).

5. A vibration isolator with a quasi-zero stiffness criterion according to claim 4, characterized in that: The three permanent magnets (506) in the magnetic quasi-zero stiffness system (5) are specifically arranged from top to bottom, and the magnetic pole directions of all permanent magnets (506) are uniformly N at the top and S at the bottom.

6. A vibration isolator with a quasi-zero stiffness criterion according to claim 5, characterized in that: The three permanent magnets (506) are equipped with a transverse tension auxiliary spring (504) and a tension main spring (505) on both sides. The permanent magnets (506) located at the upper and lower ends are equipped with tension auxiliary springs (504), and the permanent magnets (506) located in the middle are equipped with tension main springs (505).

7. A vibration isolator with a quasi-zero stiffness criterion according to claim 1, characterized in that: The L-shaped hinged steel connecting plates (503) are fixed to the edges of the upper steel plate (501) and the bottom steel plate (502), and each L-shaped hinged steel connecting plate (503) is connected to the corresponding tension auxiliary spring (504) and tension main spring (505) through high-rigidity steel strips (507).

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