A planar track type negative stiffness vibration isolation platform and a method of using the same

Abstract

This invention relates to the technical field of vibration isolation platforms, specifically disclosing a planar track-type negative stiffness vibration isolation platform and its usage method. The platform includes a vibration isolation assembly and a support assembly, with the vibration isolation assembly located above the support assembly. The vibration isolation assembly comprises a top plate, a bottom plate, sixteen vertical compression springs, and five negative stiffness components. Each group of four vertical compression springs forms a group, and each group of vertical compression springs is staggered with each negative stiffness component. The top plate and bottom plate are located above and below the vertical compression springs, respectively. A compression spring fixing plate is fixedly installed at both ends of each vertical compression spring. The top plate is located above the five negative stiffness components. Each negative stiffness component includes a connecting rod, two pistons, two sleeves, two rollers, and two tracks. The top plate is fixedly connected to the top of the connecting rod, and a piston is rotatably connected to each of the left and right sides of the connecting rod. This invention can provide negative stiffness vibration isolation for the platform using pre-compressed springs, eliminating vibration interference sources, and can detect and automatically adjust the platform's levelness.

Description

Technical Field

[0001] This invention relates to the technical field of vibration isolation platforms, specifically to a planar track-type negative stiffness vibration isolation platform and its usage method. Background Technology

[0002] Vibration isolation platforms are widely used in various fields, including aerospace, rail transportation, automotive industry, electronics and communications, medical equipment, and precision instruments. In aerospace, they isolate vibrations from aircraft engines, protecting the safety and stability of the aircraft structure. In rail transportation, they isolate vibrations from trains during operation, improving train comfort and safety. In the automotive industry, they isolate vibrations from car engines, protecting the structural safety of the car chassis and body. In electronics and communications, they protect electronic equipment from vibration, improving equipment stability and reliability. In medical equipment, they protect medical devices from vibration, ensuring accuracy and stability. In precision instruments, they protect precision instruments from vibration, improving measurement accuracy and stability.

[0003] Current technologies still have the following areas for improvement: existing vibration isolation platforms have poor low-frequency resonance and vibration isolation performance; passive vibration isolation platforms are difficult to isolate vibrations in the low-frequency range, and their vibration isolation performance is extremely low, requiring a long stabilization time and having poor operability; for large-amplitude vibrations, the vibration isolation effect is not obvious or even fails, and breaking through wide-range vibration isolation has become an urgent problem to be solved in the field of vibration isolation; aging and creep problems exist, as the platform will age after prolonged use and will experience significant creep under heavy loads; the air supply system of pneumatic vibration isolation platforms can generate problematic environmental vibrations, and using pneumatic-electric methods to level the workbench and control cylinder pressure increases complexity and the possibility of failure.

[0004] Existing vibration isolation platforms are usually placed horizontally. For applications requiring a certain level of levelness, ramps need to be installed. Different requirements have different levels of levelness, often requiring a large number of ramps of different models for assistance. Moreover, the ramps need to be installed manually, which is very inconvenient. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a planar track-type negative stiffness vibration isolation platform and its usage method. The platform can be used to isolate vibrations with negative stiffness through pre-compressed springs, eliminating vibration interference sources, and can also detect and automatically adjust the platform's levelness.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A planar track-type negative stiffness vibration isolation platform includes a vibration isolation component and a support component, wherein the vibration isolation component is located above the support component;

[0008] The vibration isolation assembly includes a top plate, a bottom plate, sixteen vertical compression springs, and five negative stiffness components. Every four vertical compression springs form a group, and each group of vertical compression springs and each negative stiffness component are arranged alternately. The top plate and the bottom plate are located above and below the vertical compression springs, respectively. Each vertical compression spring has a compression spring fixing plate fixed at both ends. The top plate is located at the top of the five negative stiffness components.

[0009] The negative stiffness assembly includes a connecting rod, two pistons, two sleeves, two rollers, and two tracks. The top plate is fixedly connected to the top of the connecting rod. A piston is rotatably connected to the left and right sides of the connecting rod, and a sleeve is slidably connected to the other end of each piston. A horizontal compression spring is provided inside each sleeve, and the piston is in contact with the horizontal compression spring.

[0010] Each piston is rotatably connected to a roller at the end away from the sleeve, and each roller is slidably connected to the track. The top plate is located between the two tracks, and the upper surface of the top plate and the upper surface of the track are on the same plane. The side of each track that contacts the corresponding roller has a structure that is wider at the top and narrower at the bottom.

[0011] The support assembly includes a support base, a levelness detector, a battery pack, and three adjustment components. The levelness detector is located at the middle of the lower end of the base plate. The battery pack is located at the middle of the bottom of the inner wall of the support base. The three adjustment components are fixedly connected to the inner wall of the support base. The three adjustment components are located at the middle of the front and rear sides of the left and right sides of the support base, respectively. A display screen and three control buttons are provided on the outer side of the support base. The display screen is electrically connected to the battery pack, and the three control buttons are electrically connected to the three adjustment components, respectively.

[0012] The adjustment assembly includes an adjustment block, a moving rod, a moving gear, a drive gear, and a drive motor. The adjustment block is fixedly connected to the upper end of the moving rod, and the lower end of the moving rod is provided with an external thread. The moving gear is sleeved on the lower end of the moving rod and is provided with an internal thread. The moving rod is connected to the support base through a fixing device. A limit groove is formed inside the fixing device. A sliding block is fixedly provided on the support base, and the sliding block is slidably connected within the limit groove.

[0013] The moving gear and the driving gear mesh with each other. The driving gear is sleeved on the rotating shaft. Two bearings are also sleeved on the rotating shaft. The two bearings are located at the upper and lower ends of the driving gear, respectively. The lower end of the rotating shaft is connected to the driving motor through a coupling. The upper ends of the three adjusting blocks are in contact with the lower end of the base plate.

[0014] Furthermore, each compression spring fixing plate located above the vertical compression spring is fixedly connected to the top plate by two top fixing screws, and each compression spring fixing plate located below the vertical compression spring is fixedly connected to the bottom plate by one bottom fixing screw.

[0015] Furthermore, each set of vertical compression springs is parallel to each of the negative stiffness components.

[0016] Furthermore, each of the connecting rods and the top plate are fixedly connected by multiple connecting screws, and a track reinforcing channel steel is fixedly installed on both sides of each track, with each track reinforcing channel steel connected to the top plate.

[0017] Furthermore, each of the horizontal compression springs is in a pre-compressed state.

[0018] Furthermore, each roller and its corresponding sleeve are rotatably connected by a first pin, and each piston and its connecting rod are rotatably connected by a second pin.

[0019] Furthermore, all three drive motors are electrically connected to the battery pack.

[0020] Furthermore, the fixture is fixedly connected to the support base by bolts, a fixing nut is sleeved on the lower end of the moving rod, and the drive gear is connected to the rotating shaft by a rotating key.

[0021] A method for using a planar track-type negative stiffness vibration isolation platform includes the following steps:

[0022] S1: Negative stiffness vibration isolation operation:

[0023] When an item is placed on the top plate, the top plate vibrates. As the top plate moves downward due to the vibration, the connecting rod and the vertical compression spring are simultaneously affected by the vibration on the top plate. The vertical compression spring has positive stiffness characteristics.

[0024] The connecting rod moves downwards driven by the top plate, and the pistons on both sides rotate along the second pin. The piston pushes the pre-compressed horizontal compression spring. The horizontal compression spring, piston and connecting rod form the first stage negative stiffness system in the pre-compressed state.

[0025] When the top plate descends significantly, the pistons on both sides rotate at a large angle along the second pin. The second pin presses against the connecting rod, and at the same time, the horizontal compression spring, piston, and connecting rod drive the roller to move down into the slope of the track.

[0026] After the second pin is tightened against the connecting rod, the first-stage negative stiffness system is disengaged. The horizontal compression spring releases some of the pressure, causing the sleeve to drive the roller to move down along the track. The track and the roller form the second-stage track-type negative stiffness system.

[0027] When the top plate is affected by vibration and moves upward, the top plate drives the connecting rod to move upward, and the horizontal compression spring, piston and connecting rod form the first stage of negative stiffness system in the pre-compression state;

[0028] When the top plate rises and displaces significantly, the pistons on both sides rotate at a large angle along the second pin. The second pin then presses against the connecting rod, and after the second pin presses against the connecting rod, the first-stage negative stiffness system disengages.

[0029] The pistons on both sides rotate along the second pin, the pistons drive the sleeve to move upward, and the sleeve drives the roller to move upward along the track;

[0030] S2: Leveling adjustment operation:

[0031] After vibration isolation is completed, once the levelness detector located at the bottom of the base plate detects that the levelness is stable, the levelness detector transmits a signal to the display screen, which displays the current levelness. The staff can then control the three adjustment components by adjusting the three control buttons.

[0032] The drive motor controls the drive gear to rotate. The drive gear meshes with the moving gear. The rotation of the moving gear drives the moving rod to move up or down. The sliding block slides in the limit groove, which drives the base plate to adjust its levelness. The levelness is then displayed on the screen by a levelness detector.

[0033] The beneficial effects of this invention are as follows:

[0034] (1) By setting a negative stiffness component, the technical effect that can be achieved is that when an item is placed on the top plate, the top plate vibrates. When the top plate moves downward due to the vibration, the connecting rod and the vertical compression spring are simultaneously affected by the vibration on the top plate. The vertical compression spring has positive stiffness characteristics. The connecting rod moves downward due to the top plate, and the pistons on both sides rotate along the second pin shaft. The piston pushes the pre-compressed horizontal compression spring. The horizontal compression spring, piston, and connecting rod form the first-stage negative stiffness system in the pre-compressed state. When the top plate descends by a large displacement, the pistons on both sides rotate at a large angle along the second pin shaft. The second pin shaft presses against the connecting rod, and simultaneously... The horizontal compression spring, piston, and connecting rod drive the roller to move down into the ramp of the track; after the second pin tightens the connecting rod, the first-stage negative stiffness system disengages, the horizontal compression spring releases some pressure, causing the sleeve to drive the roller to move down along the track. The track and roller form the second-stage track-type negative stiffness system. Through the pre-compressed horizontal compression spring and the up-and-down movement of the roller, the platform can be isolated by negative stiffness twice. The low-frequency vibration isolation effect of negative stiffness is good, there is no vibration interference source, its mechanical structure is simple, and the negative stiffness vibration isolation platform does not require an air, electricity, or pneumatic system, so it does not require regular maintenance.

[0035] (2) By setting up support components, the technical effect that can be achieved is that when the levelness detector located at the bottom of the base plate detects that the levelness is stable, the levelness detector transmits a signal to the display screen, and the display screen displays the current levelness. The operator can control the three adjustment components by adjusting the three control buttons respectively, so as to detect and automatically adjust the levelness of the platform. The levelness detector is used to detect the levelness and can transmit the changes in levelness to the display screen, so that the operator can directly observe the changes in levelness. After the vibration reduction is completed and the levelness is stable, the levelness of the platform can be adjusted by controlling the three adjustment components. All three adjustment components are connected to the battery pack, which increases the battery life and has no requirements for the power supply environment of vibration reduction, making it applicable to more scenarios.

[0036] (3) By setting the adjustment component, the technical effect that can be achieved is that the drive motor controls the drive gear to rotate, the drive gear meshes with the moving gear, the moving gear rotates and drives the moving rod to move up or down, the sliding block slides in the limit groove, and drives the base plate to adjust the levelness. The levelness is displayed on the display screen by the levelness detector. The adjustment component can control and adjust the levelness of the platform. For the vibration-damped platform, the height of the three adjustment blocks can be adjusted by controlling the control button, and the levelness of the platform can be adjusted. The three adjustment blocks support the base plate, making the structure more stable and preventing the adjustment blocks from not being able to contact the base plate. There is no need to manually install the ramp. The levelness can be adjusted for different needs simply by controlling the control button, saving manufacturing costs and making it more automated and convenient.

[0037] (4) By setting up vibration isolation components, the technical effect that can be achieved is that four vertical compression springs are grouped together, and each group of vertical compression springs is staggered with each negative stiffness component. The top plate and the bottom plate are located at the top and bottom of the vertical compression springs respectively. Each vertical compression spring has a compression spring fixing plate fixed at both ends. The top plate is located at the top of the five negative stiffness components. The vertical compression springs are compressed by the vibration of the top plate, and perform positive stiffness vibration reduction on the item to complete the vibration isolation of the item. The vertical compression springs help to increase the vibration reduction effect through positive stiffness auxiliary vibration reduction and can play a supporting role for the top plate. Attached Figure Description

[0038] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a top view of the invention with the top plate removed;

[0041] Figure 3 This is a front sectional view of the present invention;

[0042] Figure 4 for Figure 2 AA section view in the middle;

[0043] Figure 5 for Figure 3 BB section view in the middle;

[0044] Figure 6 for Figure 3 A magnified view of C in the stopped state;

[0045] Figure 7 for Figure 3 A magnified view of the C state used in the diagram;

[0046] Figure 8 The front view supporting the component;

[0047] Figure 9 A schematic diagram of the structure for adjusting the rising state of the component;

[0048] Figure 10 A schematic diagram of the structure for adjusting the descent state of the component;

[0049] Explanation of key component symbols:

[0050] In the diagram: 1. Top plate; 2. Vertical compression spring; 3. Compression spring fixing plate; 4. Base plate; 5. Track; 6. Roller; 7. Sleeve; 8. Horizontal compression spring; 9. Piston; 10. Connecting rod; 11. Track reinforcing channel steel; 12. Bottom fixing screw; 13. First pin; 14. Second pin; 15. Connecting screw; 16. Top fixing screw; 17. Support base; 18. Adjusting block; 19. Display screen; 20. Control button; 21. Moving rod; 22. Sliding block; 23. Fixing device; 24. Limiting groove; 25. Rotating shaft; 26. Bearing; 27. Drive gear; 28. Moving gear; 29. ​​Fixing nut; 30. Coupling; 31. Rotating key; 32. Drive motor; 33. Battery pack; 34. Levelness detector. Detailed Implementation

[0051] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0052] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] Reference Figures 1 to 10 The present invention discloses a planar track-type negative stiffness vibration isolation platform, which includes a vibration isolation component and a support component, with the vibration isolation component located above the support component.

[0055] The vibration isolation assembly includes a top plate 1, a bottom plate 4, sixteen vertical compression springs 2, and five negative stiffness components. Every four vertical compression springs 2 form a group, and each group of vertical compression springs 2 is staggered with each negative stiffness component. The top plate 1 and the bottom plate 4 are located at the top and bottom of the vertical compression springs 2, respectively. Each vertical compression spring 2 has a compression spring fixing plate 3 fixed at both ends. The top plate 1 is located at the top of the five negative stiffness components.

[0056] The vertical compression spring 2 helps to reduce vibration through positive stiffness, thereby increasing the vibration reduction effect and providing support for the top plate 1.

[0057] The negative stiffness assembly includes a connecting rod 10, two pistons 9, two sleeves 7, two rollers 6 and two rails 5. A top plate 1 is fixedly connected to the top of the connecting rod 10. A piston 9 is rotatably connected to the left and right sides of the connecting rod 10. A sleeve 7 is slidably connected to the other end of each piston 9. A horizontal compression spring 8 is provided inside each sleeve 7. The piston 9 is in contact with the horizontal compression spring 8.

[0058] Each piston 9 is rotatably connected to a roller 6 at the end away from the sleeve 7. Each roller 6 is slidably connected to the track 5. The top plate 1 is located between the two tracks 5. The upper surface of the top plate 1 and the upper surface of the track 5 are on the same plane. The side of each track 5 that contacts the corresponding roller 6 is a ramp with a structure that is wider at the top and narrower at the bottom.

[0059] Each compression spring fixing plate 3 located above the vertical compression spring 2 is fixedly connected to the top plate 1 by two top fixing screws 16, and each compression spring fixing plate 3 located below the vertical compression spring 2 is fixedly connected to the bottom plate 4 by one bottom fixing screw 12.

[0060] Each set of vertical compression springs 2 is parallel to each negative stiffness component. Each horizontal compression spring 8 is in a pre-compressed state. Each connecting rod 10 and the top plate 1 are fixedly connected by multiple connecting screws 15. Each track 5 has a track 5 reinforcing channel steel fixed on both sides, and each track 5 reinforcing channel steel is connected to the top plate 1.

[0061] Each roller 6 and its corresponding sleeve 7 are rotatably connected by a first pin 13, and each piston 9 and connecting rod 10 are rotatably connected by a second pin 14.

[0062] By moving the pre-compressed horizontal spring 8 and roller 6 up and down, the platform can be isolated twice with negative stiffness. The low-frequency vibration isolation effect of negative stiffness is good, there is no source of vibration interference, its mechanical structure is simple, and the negative stiffness vibration isolation platform does not require an air, electricity or pneumatic system, so it does not require regular maintenance.

[0063] The support assembly includes a support base 17, a levelness detector 34, a battery pack 33, and three adjustment components. The levelness detector 34 is located at the middle of the lower end of the base plate 4. The battery pack 33 is located at the middle of the bottom of the inner wall of the support base 17. The three adjustment components are fixedly connected to the inner wall of the support base 17. The three adjustment components are located at the middle of the front and rear sides of the left and right sides of the support base 17, respectively. A display screen 19 and three control buttons 20 are provided on the outer side of the support base 17. The display screen 19 is electrically connected to the battery pack 33, and the three control buttons 20 are electrically connected to the three adjustment components, respectively.

[0064] The level detector is used to detect the levelness and can transmit the changes in levelness to the display screen 19, so that the staff can directly observe the changes in levelness. After the vibration reduction is completed and the levelness is stable, the levelness of the platform can be adjusted by controlling the three adjustment components. All three adjustment components are connected to the battery pack 33, which increases its battery life and has no requirements for the power environment of vibration reduction, making it applicable to more scenarios.

[0065] The adjustment assembly includes an adjustment block 18, a moving rod 21, a moving gear 28, a drive gear 27, and a drive motor 32. The adjustment block 18 is fixedly connected to the upper end of the moving rod 21. The lower end of the moving rod 21 is provided with an external thread. The moving gear 28 is sleeved on the lower end of the moving rod 21 and is provided with an internal thread. The moving rod 21 is connected to the support base 17 through a retainer 23. A limit groove 24 is opened inside the retainer 23. A sliding block 22 is fixedly provided on the support base 17 and is slidably connected within the limit groove 24.

[0066] The moving gear 28 and the driving gear 27 mesh with each other. The driving gear 27 is sleeved on the rotating shaft 25. Two bearings 26 are also sleeved on the rotating shaft 25. The two bearings 26 are located at the upper and lower ends of the driving gear 27, respectively. The lower end of the rotating shaft 25 is connected to the driving motor 32 through the coupling 30. The upper ends of the three adjusting blocks 18 are in contact with the lower end of the base plate 4.

[0067] All three drive motors 32 are electrically connected to the battery pack 33. The fixture 23 is fixedly connected to the support base 17 by bolts, and a fixing nut 29 is fitted on the lower end of the moving rod 21. The drive gear 27 is connected to the rotating shaft 25 by a rotating key 31.

[0068] The adjustment component can control and adjust the level of the platform. For the vibration-damped platform, the height of the three adjustment blocks 18 can be adjusted by controlling the control button 20, thereby adjusting the level of the platform. The three adjustment blocks 18 support the base plate 4, making the structure more stable and preventing the adjustment blocks 18 from not being able to contact the base plate 4. There is no need to manually install the ramp. The level can be adjusted for different needs simply by controlling the button, saving manufacturing costs and making it more automated and convenient.

[0069] A method for using a planar track-type negative stiffness vibration isolation platform includes the following steps:

[0070] S1: Negative stiffness vibration isolation operation:

[0071] When an item is placed on the top plate 1, the top plate 1 vibrates. When the top plate 1 moves downward due to the vibration, the connecting rod 10 and the vertical compression spring 2 are simultaneously affected by the vibration on the top plate 1. The vertical compression spring 2 has positive stiffness characteristics.

[0072] The connecting rod 10 moves downward under the action of the top plate 1, and the pistons 9 on both sides rotate along the second pin 14. The pistons 9 push the pre-compressed horizontal spring 8. The horizontal spring 8, the pistons 9 and the connecting rod 10 form the first stage negative stiffness system in the pre-compressed state.

[0073] When the top plate 1 descends and displaces significantly, the pistons 9 on both sides rotate at a large angle along the second pin 14. The second pin 14 presses against the connecting rod 10, and at the same time, the horizontal compression spring 8, the piston 9, and the connecting rod 10 drive the roller 6 to move down into the slope of the track 5.

[0074] After the second pin 14 presses against the connecting rod 10, the first-stage negative stiffness system is disengaged. The horizontal compression spring 8 releases some pressure, causing the sleeve 7 to drive the roller 6 to move down along the track 5. The track 5 and the roller 6 form the second-stage track-type negative stiffness system.

[0075] When the top plate 1 is affected by vibration and moves upward, the top plate 1 drives the connecting rod 10 to move upward. The horizontal compression spring 8, piston 9 and connecting rod 10 form the first stage of negative stiffness system in the pre-compression state.

[0076] When the top plate 1 rises and displaces significantly, the pistons 9 on both sides rotate at a large angle along the second pin 14. The second pin 14 presses against the connecting rod 10. After the second pin 14 presses against the connecting rod 10, the first-stage negative stiffness system stops working.

[0077] The pistons 9 on both sides rotate along the second pin 14, the pistons 9 drive the sleeve 7 to move upward, and the sleeve 7 drives the roller 6 to move upward along the track 5.

[0078] S2: Leveling adjustment operation:

[0079] After vibration isolation is completed, when the levelness detector 34 located at the bottom of the base plate 4 detects that the levelness is stable, the levelness detector 34 transmits a signal to the display screen 19, and the display screen 19 displays the current levelness. The staff can control the three adjustment components by adjusting the three control buttons 20 respectively.

[0080] The drive motor 32 controls the drive gear 27 to rotate. The drive gear 27 meshes with the moving gear 28. The rotation of the moving gear 28 drives the moving rod 21 to move up or down. The sliding block 22 slides in the limiting groove 24, which drives the base plate 4 to adjust its levelness. The levelness is then displayed on the display screen 19 by the levelness detector 34.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A planar track-type negative stiffness vibration isolation platform, characterized in that: It includes a vibration isolation component and a support component, wherein the vibration isolation component is located above the support component; The vibration isolation assembly includes a top plate, a bottom plate, sixteen vertical compression springs, and five negative stiffness components. Every four vertical compression springs form a group, and each group of vertical compression springs and each negative stiffness component are arranged alternately. The top plate and the bottom plate are located above and below the vertical compression springs, respectively. Each vertical compression spring has a compression spring fixing plate fixed at both ends. The top plate is located at the top of the five negative stiffness components. The negative stiffness assembly includes a connecting rod, two pistons, two sleeves, two rollers, and two tracks. The top plate is fixedly connected to the top of the connecting rod. A piston is rotatably connected to the left and right sides of the connecting rod, and a sleeve is slidably connected to the other end of each piston. A horizontal compression spring is provided inside each sleeve, and the piston is in contact with the horizontal compression spring. Each of the horizontal compression springs is in a pre-compressed state; Each piston is rotatably connected to a roller at the end away from the sleeve, and each roller is slidably connected to the track. The top plate is located between the two tracks, and the upper surface of the top plate and the upper surface of the track are on the same plane. The side of each track that contacts the corresponding roller is a sloping structure that is narrow at the top and wide at the bottom. The support assembly includes a support base, a levelness detector, a battery pack, and three adjustment components. The levelness detector is located at the middle of the lower end of the base plate. The battery pack is located at the middle of the bottom of the inner wall of the support base. The three adjustment components are fixedly connected to the inner wall of the support base. The three adjustment components are located at the middle of the front and rear sides of the left and right sides of the support base, respectively. A display screen and three control buttons are provided on the outer side of the support base. The display screen is electrically connected to the battery pack, and the three control buttons are electrically connected to the three adjustment components, respectively. The adjustment assembly includes an adjustment block, a moving rod, a moving gear, a drive gear, and a drive motor. The adjustment block is fixedly connected to the upper end of the moving rod, and the lower end of the moving rod is provided with an external thread. The moving gear is sleeved on the lower end of the moving rod and is provided with an internal thread. The moving rod is connected to the support base through a fixing device. A limit groove is formed inside the fixing device. A sliding block is fixedly provided on the support base, and the sliding block is slidably connected within the limit groove. The moving gear and the driving gear mesh with each other. The driving gear is sleeved on the rotating shaft. Two bearings are also sleeved on the rotating shaft. The two bearings are located at the upper and lower ends of the driving gear, respectively. The lower end of the rotating shaft is connected to the driving motor through a coupling. The upper ends of the three adjusting blocks are in contact with the lower end of the base plate.

2. The planar track-type negative stiffness vibration isolation platform according to claim 1, characterized in that: Each compression spring fixing plate located above the vertical compression spring is fixedly connected to the top plate by two top fixing screws, and each compression spring fixing plate located below the vertical compression spring is fixedly connected to the bottom plate by one bottom fixing screw.

3. The planar track-type negative stiffness vibration isolation platform according to claim 1, characterized in that: Each set of vertical compression springs is parallel to each of the negative stiffness components.

4. The planar track-type negative stiffness vibration isolation platform according to claim 1, characterized in that: Each connecting rod and the top plate are fixedly connected by multiple connecting screws. Each track has a track reinforcing channel steel fixed on both sides, and each track reinforcing channel steel is connected to the top plate.

5. A planar track-type negative stiffness vibration isolation platform according to claim 1, characterized in that: Each roller and its corresponding sleeve are rotatably connected by a first pin, and each piston and its connecting rod are rotatably connected by a second pin.

6. The planar track-type negative stiffness vibration isolation platform according to claim 1, characterized in that: All three drive motors are electrically connected to the battery pack.

7. A planar track-type negative stiffness vibration isolation platform according to claim 1, characterized in that: The fixture is fixedly connected to the support base by bolts, a fixing nut is sleeved on the lower end of the moving rod, and the drive gear is connected to the rotating shaft by a rotating key.

8. A method of using a planar track-type negative stiffness vibration isolation platform, applied to the vibration isolation platform as described in any one of claims 1-7, characterized in that: Including the following steps: S1: Negative stiffness vibration isolation operation: When an item is placed on the top plate, the top plate vibrates. As the top plate moves downward due to the vibration, the connecting rod and the vertical compression spring are simultaneously affected by the vibration on the top plate. The vertical compression spring has positive stiffness characteristics. The connecting rod moves downwards driven by the top plate, and the pistons on both sides rotate along the second pin. The piston pushes the pre-compressed horizontal compression spring. The horizontal compression spring, piston and connecting rod form the first stage negative stiffness system in the pre-compressed state. When the top plate descends significantly, the pistons on both sides rotate at a large angle along the second pin. The second pin presses against the connecting rod, and at the same time, the horizontal compression spring, piston, and connecting rod drive the roller to move down into the slope of the track. After the second pin is tightened against the connecting rod, the first-stage negative stiffness system is disengaged. The horizontal compression spring releases some of the pressure, causing the sleeve to drive the roller to move down along the track. The track and the roller form the second-stage track-type negative stiffness system. When the top plate is affected by vibration and moves upward, the top plate drives the connecting rod to move upward, and the horizontal compression spring, piston and connecting rod form the first stage of negative stiffness system in the pre-compression state; When the top plate rises and displaces significantly, the pistons on both sides rotate at a large angle along the second pin. The second pin then presses against the connecting rod, and after the second pin presses against the connecting rod, the first-stage negative stiffness system disengages. The pistons on both sides rotate along the second pin, the pistons drive the sleeve to move upward, and the sleeve drives the roller to move upward along the track; S2: Leveling adjustment operation: After vibration isolation is completed, once the levelness detector located at the bottom of the base plate detects that the levelness is stable, the levelness detector transmits a signal to the display screen, which displays the current levelness. The staff can then control the three adjustment components by adjusting the three control buttons. The drive motor controls the drive gear to rotate. The drive gear meshes with the moving gear. The rotation of the moving gear drives the moving rod to move up or down. The sliding block slides in the limit groove, which drives the base plate to adjust its levelness. The levelness is then displayed on the screen by a levelness detector.

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