Active shockproof base and mounting method thereof

Abstract

The invention relates to the technical field of vibration reduction, and discloses an active anti-vibration base and an installation method thereof.Through cooperation of an electromagnetic coil and a magnet rod, an epoxy cover plate is pushed upwards through the pushing force of the electromagnetic coil on the magnet rod, so that magnetic suspension support is formed for vibration reduction, the influence of external vibration on equipment can be reduced, and the service life of the equipment is prolonged. Meanwhile, through cooperation of a piston pipe and a lifting piston, when the base vibrates, the lifting piston vibrates up and down, external air is pressurized and pumped into the air spring, so that the pressure of the air spring is increased, the inherent frequency of the system can be changed, the resonant frequency is avoided, and the influence caused by resonance is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction, in particular to an active vibration-proof base and a mounting method thereof. Background Art

[0002] The anti-vibration base is a device used to reduce the vibration of the equipment. Its core function is to absorb and disperse the vibration energy. Ground vibration and vibration will have a negative impact on the working efficiency of the equipment. Using an anti-vibration base can reduce this impact, ensure that the equipment operates in a stable working environment, and improve work efficiency and production quality.

[0003] Traditional anti-vibration bases, such as a low-frequency anti-micro-vibration base for precision instruments with publication number CN217207502U, use metal springs and air springs to reduce vibration, which can effectively reduce the impact of vibration on the equipment. However, when encountering low-frequency vibrations outside the effective range, the anti-vibration base may still resonate and affect the normal operation of the equipment. Summary of the invention

[0004] The object of the present invention is to provide an active anti-vibration base and an installation method thereof, so as to solve the problem that the conventional anti-vibration base may resonate during operation as mentioned in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions: an active anti-vibration base, comprising a pressure-dividing steel plate base, an automatic frequency modulation vibration absorber is arranged on the pressure-dividing steel plate base, and an epoxy cover plate is laid above the automatic frequency modulation vibration absorber;

[0006] The automatic frequency modulation vibration damper comprises a first vibration damping plate, the first vibration damping plate is fixedly connected to the epoxy cover plate by bolts, a second vibration damping plate is arranged below the first vibration damping plate, a third vibration damping plate is arranged below the second vibration damping plate, the third vibration damping plate is fixedly connected to the pressure dividing steel plate base by bolts, and an air spring is arranged between the first vibration damping plate and the second vibration damping plate;

[0007] A piston tube is arranged between the second vibration damping plate and the third vibration damping plate, a lifting limit rod is fixedly connected to the bottom of the first vibration damping plate, the lifting limit rod passes through the piston tube, a piston connecting column is movably connected to the lower end of the lifting limit rod, a lifting piston is fixedly connected to the piston connecting column, a rubber sealing ring is arranged between the lifting piston and the inner wall of the piston tube, an air intake check valve is arranged at the upper end of the piston tube, a check valve is arranged in the lifting piston, an exhaust port is arranged at the bottom of the piston tube, the exhaust port is connected to a compressed air pipe, and the other end of the compressed air pipe is connected to an air spring.

[0008] Furthermore, the piston tubes are provided with four groups, which are respectively located at the four corners of the second vibration damping plate and the third vibration damping plate, the upper end of the piston tube is fixedly connected to the piston tube, and the lower end of the piston tube is fixedly connected to the third vibration damping plate.

[0009] Furthermore, four groups of lifting limit rods are provided, and the four groups of lifting limit rods are respectively located at four corners of the first vibration damping plate, and the positions of the lifting limit rods correspond to the positions of the piston tubes.

[0010] Furthermore, the air spring includes an upper pressure plate and a lower pressure plate, the upper pressure plate is fixedly connected to the first vibration damping plate, the lower pressure plate is fixedly connected to the second vibration damping plate, a folded compression rubber airbag is arranged between the upper pressure plate and the lower pressure plate, and the folded compression rubber airbag is sealed and connected to the upper pressure plate and the lower pressure plate respectively.

[0011] Furthermore, a magnet rod is fixedly connected to the bottom of the upper pressure plate, a telescopic cylinder is fixedly connected to the bottom of the lower pressure plate, the lower end of the magnet rod is inserted into the telescopic cylinder, an electromagnetic coil is arranged on the outside of the telescopic cylinder, the compressed air pipe is connected to the bottom of the telescopic cylinder, and a leak-proof one-way valve is arranged at the connection between the compressed air pipe and the telescopic cylinder.

[0012] Furthermore, a first magnet groove is provided on the inner wall of the upper end of the piston tube, a first limiting magnet is embedded in the first magnet groove, a second magnet groove is provided on the outer wall of the lifting and lowering limiting rod, a second limiting magnet is embedded in the second magnet groove, the lifting and lowering limiting rod is a hexagonal prism, six groups of the first limiting magnets and the second limiting magnets are arranged, and the six groups of the first limiting magnets and the second limiting magnets are strictly distributed on the six sides of the hexagonal prism, and the first limiting magnets and the second limiting magnets are opposite to each other with the same magnetic poles.

[0013] Furthermore, a first circular limit groove is provided at the lower end of the lifting limit rod, a second circular limit groove is provided on the outer side of the first circular limit groove, the diameter of the second circular limit groove is smaller than the first circular limit groove, and a limit block is fixedly connected to the upper end of the piston connecting column, and the limit block and the piston connecting column are fixedly connected by a connecting rod.

[0014] Furthermore, the diameter of the limit block is larger than the diameter of the connecting rod, the limit block is inserted into the first circular limit groove, the connecting rod passes through the second circular limit groove, the diameter of the first circular limit groove is larger than the diameter of the limit block, the first circular limit groove is equal to the height of the limit block, and the diameter of the second circular limit groove is larger than the diameter of the connecting rod.

[0015] Furthermore, the one-way pump air valve includes an air vent, which passes through the upper and lower ends of the lifting piston, a cross retainer is fixedly connected to the air vent, the piston connecting column passes through the cross retainer, and the piston connecting column is fixedly connected to the cross retainer, the lower end of the piston connecting column is fixedly connected to a gasket bolt by a thread, the piston connecting column is outerly provided with a pressure spring, a rubber valve sheet is provided at the opening below the air vent, the piston connecting column passes through the rubber valve sheet, the pressure spring is located between the gasket bolt and the rubber valve sheet, and the diameter of the rubber valve sheet is larger than the air vent.

[0016] The present invention provides another technical solution: a method for installing an active anti-vibration base, comprising the following steps:

[0017] S1. Installation of the pressure-dividing steel plate base: First, check the pressure-dividing steel plate base to ensure that it is intact, free of rust and deformation. At the same time, ensure that the installation base is flat, dry and oil-free. Clean and pre-treat it if necessary. Use tools such as a crane or forklift to carefully move the pressure-dividing steel plate base to the predetermined installation position. During the movement, avoid collision and scratching the base surface. Then use a level to accurately level the pressure-dividing steel plate base. It may be necessary to insert a gasket of appropriate thickness or adjust the bolts under the base until the specified level requirement is reached. After confirming that the base is completely leveled, use high-strength bolts to firmly fix it on the installation base. During the tightening of the bolts, the principle of cross symmetry should be followed, and force should be applied gradually and evenly to prevent the base from deforming.

[0018] S2. Automatic frequency modulation shock absorber installation: According to the design layout, six sets of automatic frequency modulation shock absorbers are fixedly installed at the four corners and both sides of the middle of the pressure-dividing steel plate base to ensure uniform distribution to maximize the shock absorption effect. Use special installation tools and bolts to fix them. Note that the pre-tightening torque of the bolts must meet the requirements of the product manual;

[0019] S3. Laying of epoxy cover: Confirm that the size and thickness of the epoxy cover are consistent with the design drawings, and the surface is flat and smooth without defects such as cracks and bubbles. Gently place the epoxy cover on the installed automatic frequency modulation shock absorber, and pay attention to keep the cover and shock absorber aligned to avoid misalignment. According to the design requirements, fix the epoxy cover with bolts at the edge to enhance the overall stability. Avoid causing additional pressure on the shock absorber when fixing;

[0020] S4. Leveling: Through the control system of the automatic frequency modulation shock absorber, gradually pressurize the internal air spring until the preset pressure value is reached. During the pressurization process, pay attention to the pressure gauge reading to ensure that the pressure is uniform and stable. While pressurizing, use a level to check the levelness of the epoxy cover plate again. If necessary, further adjust the pressure of the air spring or adjust the gasket of the pressure-dividing steel plate base until the levelness standard is reached.

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

[0022] 1. The present invention provides an active shockproof base and an installation method thereof. Through the cooperation of an electromagnetic coil and a magnet rod, the driving force of the electromagnetic coil on the magnet rod is utilized to push the epoxy cover plate upward, thereby forming a magnetic suspension support for vibration reduction, which can reduce the influence of external vibration on the equipment. At the same time, through the cooperation of a piston tube and a lifting piston, when the base vibrates, the lifting piston is vibrated up and down to pressurize the outside air and pump it into the air spring, so that the pressure of the air spring is increased, thereby changing the natural frequency of the system, avoiding the resonant frequency, and reducing the influence of resonance.

[0023] 2. The present invention provides an active anti-vibration base and an installation method thereof. The horizontal displacement of the lifting limit rod can be limited by the repulsion of the like poles of the first limit magnet and the second magnet slot. No fixed positioning is required. Through magnetic positioning, the influence of shear wave vibration on the equipment can be avoided, and the anti-vibration effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the layout structure of the automatic frequency modulation shock absorber of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the automatic frequency modulation shock absorber of the present invention;

[0027] Figure 4 It is a schematic diagram of the cross-sectional structure of the air spring of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the piston tube and the lifting limit rod of the present invention;

[0029] Figure 6 This is a schematic diagram of the lifting piston structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the first limiting magnet and the second magnet slot of the present invention.

[0031] Numbers in the figure: 1. Pressure-dividing steel plate base; 2. Automatic frequency-modulating shock absorber; 3. Epoxy cover plate; 4. First shock absorber plate; 5. Second shock absorber plate; 6. Third shock absorber plate; 7. Air spring; 701. Upper pressure plate; 702. Lower pressure plate; 703. Folding compression rubber airbag; 704. Magnet rod; 705. Telescopic cylinder; 8. Electromagnetic coil; 9. Piston tube; 901. First magnet slot; 902. First limit magnet; 903. Inlet check valve; 10. Lifting limit rod; 1001. Second Magnet slot; 1002, second limiting magnet; 1003, first circular limiting slot; 1004, second circular limiting slot; 11, piston connecting column; 1101, limiting block; 1102, connecting rod; 12, lifting piston; 1201, rubber sealing ring; 13, one-way pump air valve; 1301, vent hole; 1302, cross retainer; 1303, gasket bolt; 1304, pressure spring; 1305, rubber valve plate; 14, exhaust port; 15, compressed air pipe; 16, leak-proof one-way valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0034] See also Figure 1 - Figure 7 An active anti-vibration base and an installation method thereof include a pressure-dividing steel plate base 1, an automatic frequency modulation vibration absorber 2 is arranged on the pressure-dividing steel plate base 1, and an epoxy cover plate 3 is laid above the automatic frequency modulation vibration absorber 2.

[0035] The automatic frequency modulation vibration damper 2 includes a first vibration damping plate 4, which is fixedly connected to the epoxy cover plate 3 by bolts, a second vibration damping plate 5 is arranged below the first vibration damping plate 4, a third vibration damping plate 6 is arranged below the second vibration damping plate 5, the third vibration damping plate 6 is fixedly connected to the pressure-dividing steel plate base 1 by bolts, an air spring 7 is arranged between the first vibration damping plate 4 and the second vibration damping plate 5, the air spring 7 includes an upper pressure plate 701 and a lower pressure plate 702. The upper pressure plate 701 is fixedly connected to the first vibration damping plate 4, the lower pressure plate 702 is fixedly connected to the second vibration damping plate 5, a folded compression rubber airbag 703 is arranged between the upper pressure plate 701 and the lower pressure plate 702, and the folded compression rubber airbag 703 is sealed and connected to the upper pressure plate 701 and the lower pressure plate 702 respectively by bonding.

[0036] A magnet rod 704 is fixedly connected to the bottom of the upper pressure plate 701, and a telescopic cylinder 705 is fixedly connected to the bottom of the lower pressure plate 702. The lower end of the magnet rod 704 is inserted into the telescopic cylinder 705, and an electromagnetic coil 8 is arranged on the outside of the telescopic cylinder 705. When the magnet rod 704 moves up and down in the telescopic cylinder 705, the system can detect the induced current in the electromagnetic coil 8, thereby detecting the vibration. At the same time, adjusting the current in the electromagnetic coil 8 can also change the driving force on the magnet rod 704, change the bearing capacity, and reduce the vibration at the same time.

[0037] A piston tube 9 is arranged between the second vibration damping plate 5 and the third vibration damping plate 6. Four groups of piston tubes 9 are arranged. The four groups of piston tubes 9 are respectively located at the four corners of the second vibration damping plate 5 and the third vibration damping plate 6. The upper end of the piston tube 9 is fixedly connected to the piston tube 9, and the lower end of the piston tube 9 is fixedly connected to the third vibration damping plate 6, so that the relative position of the second vibration damping plate 5 and the third vibration damping plate 6 is limited. A lifting limit rod 10 is fixedly connected to the bottom of the first vibration damping plate 4. Four groups of lifting limit rods 10 are arranged. The four groups of lifting limit rods 10 are respectively located at the four corners of the first vibration damping plate 4, and the positions of the lifting limit rods 10 correspond to the positions of the piston tube 9, so that the lifting limit rod 10 can pass through the piston tube 9.

[0038] A first magnet groove 901 is provided on the inner wall of the upper end of the piston tube 9, and a first limiting magnet 902 is embedded in the first magnet groove 901. A second magnet groove 1001 is provided on the outer wall of the lifting limiting rod 10, and a second limiting magnet 1002 is embedded in the second magnet groove 1001. The lifting limiting rod 10 is a hexagonal prism. There are six groups of first limiting magnets 902 and second limiting magnets 1002, and the six groups of first limiting magnets 902 and second limiting magnets 1002 are strictly distributed on the six sides of the hexagonal prism, and the first limiting magnets 902 and the second limiting magnets 1002 are opposite to each other with the same magnetic poles. In this way, the first limiting magnet 902 can limit the six groups of second limiting magnets 1002 from six directions, thereby horizontally limiting the lifting limiting rod 10. The use of magnetic force for horizontal limiting can reduce vibration in the horizontal direction.

[0039] The lower end of the lifting limit rod 10 is movably connected with a piston connecting column 11, and a first circular limit groove 1003 is provided at the lower end of the lifting limit rod 10, and a second circular limit groove 1004 is provided outside the first circular limit groove 1003, and the diameter of the second circular limit groove 1004 is smaller than the first circular limit groove 1003. The upper end of the piston connecting column 11 is fixedly connected to a limit block 1101, and the limit block 1101 and the piston connecting column 11 are fixedly connected by a connecting rod 1102. The diameter of the limit block 1101 is larger than the diameter of the connecting rod 1102, and the limit block 1101 is stuck in the first In the circular limit groove 1003, the connecting rod 1102 passes through the second circular limit groove 1004, the diameter of the first circular limit groove 1003 is greater than the diameter of the limit block 1101, the first circular limit groove 1003 is equal to the height of the limit block 1101, and the diameter of the second circular limit groove 1004 is greater than the diameter of the connecting rod 1102, so that the lifting limit rod 10 only limits the freedom of the piston connecting column 11 in the vertical direction, and the piston connecting column 11 can move freely in the water direction, so that the horizontal vibration of the lifting piston 12 will not affect the lifting limit rod 10.

[0040] The piston connecting column 11 is fixedly connected with the lifting piston 12, and a rubber sealing ring 1201 is arranged between the lifting piston 12 and the inner wall of the piston tube 9. The upper end of the piston tube 9 is provided with an air intake check valve 903, and the lifting piston 12 is provided with a one-way pump air valve 13. The one-way pump air valve 13 includes a vent hole 1301, and the vent hole 1301 runs through the upper and lower ends of the lifting piston 12. A cross retainer 1302 is fixedly connected in the vent hole 1301. The piston connecting column 11 runs through the cross retainer 1302, and the piston connecting column 11 is fixedly connected to the cross retainer 1302. The lower end of the piston connecting column 11 is screwed The piston tube 9 is fixedly connected with a gasket bolt 1303, a pressure spring 1304 is provided on the outer sleeve of the piston connecting column 11, a rubber valve sheet 1305 is provided at the opening below the vent 1301, the piston connecting column 11 passes through the rubber valve sheet 1305, the pressure spring 1304 is located between the gasket bolt 1303 and the rubber valve sheet 1305, the diameter of the rubber valve sheet 1305 is larger than the vent 1301, an exhaust port 14 is provided at the bottom of the piston tube 9, the exhaust port 14 is connected to a compressed air pipe 15, the compressed air pipe 15 is connected to the bottom of the telescopic cylinder 705, and a leak-proof one-way valve 16 is provided at the connection between the compressed air pipe 15 and the telescopic cylinder 705. In this way, when encountering vibration, the tremor will cause the lifting piston 12 to move up and down. When the lifting piston 12 moves upward, the air intake check valve 903 at the upper end of the piston tube 9 is closed, the pressure of the piston tube 9 increases, and the pressure below the piston tube 9 decreases, thereby pushing the rubber valve sheet 1305 open, allowing the air above the piston tube 9 to enter the bottom of the piston tube 9. When the lifting piston 12 moves downward, the pressure spring 1304 will push the rubber valve sheet 1305 to block the vent 1301. As the space below the lifting piston 12 decreases, the air will be compressed, and the air will often be compressed into the air spring 7 multiple times to change its natural frequency.

[0041] A method for installing an active anti-vibration base comprises the following steps:

[0042] S1. Installation of the pressure-dividing steel plate base 1: First, check the pressure-dividing steel plate base 1 to ensure that it is intact, free of rust and deformation. At the same time, ensure that the installation base is flat, dry and oil-free. Clean and pre-treat it when necessary. Use tools such as a crane or forklift to carefully move the pressure-dividing steel plate base 1 to the predetermined installation position. During the move, avoid collision and scratches on the surface of the base. Then use a spirit level to accurately level the pressure-dividing steel plate base 1. It may be necessary to insert gaskets of appropriate thickness or adjust bolts under the base until the specified level requirement is reached. After confirming that the base is completely leveled, use high-strength bolts to firmly fix it on the installation base. During the tightening process of the bolts, the principle of cross symmetry should be followed, and the force should be applied gradually and evenly to prevent the base from deforming.

[0043] S2. Installation of automatic frequency modulation shock absorber 2: According to the design layout, six groups of automatic frequency modulation shock absorbers 2 are fixedly installed at the four corners and both sides of the middle of the pressure-dividing steel plate base 1 to ensure uniform distribution to maximize the shock absorption effect. Use special installation tools and bolts to fix them. Note that the pre-tightening torque of the bolts must comply with the requirements of the product manual.

[0044] S3. Laying of epoxy cover plate 3: Confirm that the size and thickness of epoxy cover plate 3 are consistent with the design drawings, and the surface is flat and smooth without defects such as cracks and bubbles. Gently place the epoxy cover plate 3 on the installed automatic frequency modulation shock absorber 2. Pay attention to keep the cover plate and the shock absorber aligned to avoid misalignment. According to the design requirements, fix the epoxy cover plate 3 with bolts on the edge to enhance the overall stability. Avoid causing additional pressure on the shock absorber when fixing.

[0045] S4. Leveling: Through the control system of the automatic frequency modulation shock absorber 2, the internal air spring 7 is gradually pressurized until the predetermined pressure value is reached. During the pressurization process, it is necessary to pay attention to the pressure gauge reading to ensure that the pressure is uniform and stable. While pressurizing, use a level to check the levelness of the epoxy cover plate 3 again. If necessary, further adjust the pressure of the air spring 7 or adjust the gasket of the pressure-dividing steel plate base 1 until the levelness standard is reached.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active anti-vibration base, comprising a pressure-dividing steel plate base (1), characterized in that: An automatic frequency modulation vibration damper (2) is arranged on the pressure-dividing steel plate base (1), and an epoxy cover plate (3) is laid above the automatic frequency modulation vibration damper (2); The automatic frequency modulation vibration damper (2) comprises a first vibration damping plate (4), the first vibration damping plate (4) is fixedly connected to the epoxy cover plate (3) by bolts, a second vibration damping plate (5) is arranged below the first vibration damping plate (4), a third vibration damping plate (6) is arranged below the second vibration damping plate (5), the third vibration damping plate (6) is fixedly connected to the pressure dividing steel plate base (1) by bolts, and an air spring (7) is arranged between the first vibration damping plate (4) and the second vibration damping plate (5); A piston tube (9) is arranged between the second vibration damping plate (5) and the third vibration damping plate (6); a lifting limit rod (10) is fixedly connected to the bottom of the first vibration damping plate (4); the lifting limit rod (10) passes through the piston tube (9); a piston connecting column (11) is movably connected to the lower end of the lifting limit rod (10); the piston connecting column (11) is fixedly connected to a lifting piston (12); a rubber sealing ring (1201) is arranged between the lifting piston (12) and the inner wall of the piston tube (9); an air intake check valve (903) is arranged at the upper end of the piston tube (9); a check valve (13) is arranged inside the lifting piston (12); an exhaust port (14) is arranged at the bottom of the piston tube (9); the exhaust port (14) is connected to a compressed air pipe (15); the other end of the compressed air pipe (15) is connected to an air spring (7).

2. The active anti-vibration base according to claim 1, characterized in that: The piston tubes (9) are provided in four groups, and the four groups of piston tubes (9) are respectively located at four corners of the second vibration damping plate (5) and the third vibration damping plate (6); the upper ends of the piston tubes (9) are fixedly connected to the piston tubes (9), and the lower ends of the piston tubes (9) are fixedly connected to the third vibration damping plate (6).

3. The active anti-vibration base according to claim 2, characterized in that: Four groups of lifting limit rods (10) are provided, and the four groups of lifting limit rods (10) are respectively located at the four corners of the first vibration damping plate (4), and the positions of the lifting limit rods (10) correspond to the positions of the piston tubes (9).

4. The active anti-vibration base according to claim 1, characterized in that: The air spring (7) comprises an upper pressure plate (701) and a lower pressure plate (702); the upper pressure plate (701) is fixedly connected to the first vibration damping plate (4); the lower pressure plate (702) is fixedly connected to the second vibration damping plate (5); a folded compression rubber airbag (703) is provided between the upper pressure plate (701) and the lower pressure plate (702); the folded compression rubber airbag (703) is sealedly connected to the upper pressure plate (701) and the lower pressure plate (702), respectively.

5. The active anti-vibration base according to claim 4, characterized in that: A magnet rod (704) is fixedly connected to the lower side of the upper pressure plate (701), a telescopic cylinder (705) is fixedly connected to the bottom side of the lower pressure plate (702), the lower end of the magnet rod (704) is inserted into the telescopic cylinder (705), an electromagnetic coil (8) is arranged on the outer side of the telescopic cylinder (705), the compressed air pipe (15) is connected to the bottom of the telescopic cylinder (705), and a leak-proof one-way valve (16) is arranged at the connection between the compressed air pipe (15) and the telescopic cylinder (705).

6. The active anti-vibration base according to claim 1, characterized in that: A first magnet groove (901) is provided on the inner wall of the upper end of the piston tube (9), and a first limiting magnet (902) is embedded in the first magnet groove (901). A second magnet groove (1001) is provided on the outer wall of the lifting and lowering limiting rod (10), and a second limiting magnet (1002) is embedded in the second magnet groove (1001). The lifting and lowering limiting rod (10) is a hexagonal prism. Six groups of the first limiting magnet (902) and the second limiting magnet (1002) are provided, and the six groups of the first limiting magnet (902) and the second limiting magnet (1002) are strictly distributed on the six sides of the hexagonal prism, and the first limiting magnet (902) and the second limiting magnet (1002) have the same magnetic poles facing each other.

7. The active anti-vibration base according to claim 1, characterized in that: A first circular limiting groove (1003) is formed at the lower end of the lifting limiting rod (10), a second circular limiting groove (1004) is formed outside the first circular limiting groove (1003), the diameter of the second circular limiting groove (1004) is smaller than the diameter of the first circular limiting groove (1003), the upper end of the piston connecting column (11) is fixedly connected to a limiting block (1101), and the limiting block (1101) and the piston connecting column (11) are fixedly connected via a connecting rod (1102).

8. The active anti-vibration base according to claim 7, characterized in that: The diameter of the limit block (1101) is greater than the diameter of the connecting rod (1102); the limit block (1101) is inserted into the first circular limit groove (1003); the connecting rod (1102) passes through the second circular limit groove (1004); the diameter of the first circular limit groove (1003) is greater than the diameter of the limit block (1101); the first circular limit groove (1003) is equal to the height of the limit block (1101); and the diameter of the second circular limit groove (1004) is greater than the diameter of the connecting rod (1102).

9. The active anti-vibration base according to claim 1, characterized in that: The one-way pump air valve (13) comprises a vent hole (1301), the vent hole (1301) passes through the upper and lower ends of the lifting piston (12), a cross holder (1302) is fixedly connected inside the vent hole (1301), the piston connecting column (11) passes through the cross holder (1302), and the piston connecting column (11) is fixedly connected to the cross holder (1302), the lower end of the piston connecting column (11) is fixedly connected to a gasket bolt (1303) by means of a thread, the outer sleeve of the piston connecting column (11) is provided with a pressure spring (1304), a rubber valve sheet (1305) is provided at the opening below the vent hole (1301), the piston connecting column (11) passes through the rubber valve sheet (1305), the pressure spring (1304) is located between the gasket bolt (1303) and the rubber valve sheet (1305), and the diameter of the rubber valve sheet (1305) is larger than that of the vent hole (1301).

10. A method for installing an active anti-vibration base according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Installation of the pressure-dividing steel plate base (1): First, check the pressure-dividing steel plate base (1) to ensure that it is intact, free of rust and deformation, and move the pressure-dividing steel plate base (1) to the predetermined installation position. During the movement, avoid collision and scratching the base surface. Then, use a level to accurately level the pressure-dividing steel plate base (1). After confirming that the base is completely leveled, use high-strength bolts to firmly fix it to the installation base surface; S2. Automatic frequency modulation shock absorber (2) installation: According to the design layout, the six sets of automatic frequency modulation shock absorbers (2) are fixedly installed at the four corners and both sides of the middle of the pressure-dividing steel plate base (1), and fixed using special installation tools and bolts; S3. Laying the epoxy cover (3): Gently place the epoxy cover (3) on the installed automatic frequency modulation damper (2), paying attention to keep the cover and the damper aligned to avoid misalignment; S4. Leveling: The internal air spring (7) is gradually pressurized through the control system of the automatic frequency modulation shock absorber (2) until a predetermined pressure value is reached. While pressurizing, the level of the epoxy cover plate (3) is checked again using a level gauge, and further adjustments are made by fine-tuning the pressure of the air spring (7) until the level standard is reached.

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