Horizontal multi-stage stiffness vibration isolation device with damping

Abstract

The present application belongs to the technical field of vibration control, and particularly relates to a horizontal multi-stage stiffness vibration isolation device with damping, which comprises a bearing plate, a bottom plate, a positive stiffness mechanism and a negative stiffness mechanism arranged between the bearing plate and the bottom plate, and a transmission mechanism for connecting the positive stiffness mechanism and the negative stiffness mechanism in parallel. The positive stiffness mechanism comprises four groups of steel springs and a sliding rod arranged in the steel springs, and the two ends of the sliding rod are connected to the support plate. The negative stiffness mechanism comprises four groups of dampers arranged in an inclined manner, and each damper is composed of a pre-compressed horizontal inclined steel spring, a piston rod, a piston sleeve and a built-in viscous damping liquid, and the two ends of each damper are hinged to a center connecting block and a sliding block. The transmission mechanism is composed of a guide rail, a sliding block, a limiting sliding block and a transmission block, the guide rail and the transmission block are fixed to the bottom plate, and the sliding block and the limiting sliding block are installed on the guide rail. The present application has good low-frequency vibration isolation performance in the case of small horizontal amplitude, and can be designed to have multi-stage stiffness characteristics and be applied to different vibration isolation scenes.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vibration control, and particularly relates to a horizontal multi-stage stiffness vibration isolation device with damping. BACKGROUND

[0002] At present, passive vibration isolation technology is to isolate ground vibration from the upper structure by setting a vibration isolation layer and using a vibration isolator, so as to effectively protect the isolated object from damage. By reducing the linear stiffness of the linear vibration isolator, the vibration isolation performance can be improved. However, low stiffness will cause large static displacement of the linear vibration isolator. In order to overcome this shortcoming, a nonlinear vibration isolator with high static stiffness and low dynamic stiffness is proposed. Higher static stiffness means smaller deflection and larger load capacity, while lower dynamic stiffness means wider isolation frequency range. The stiffness characteristic of the nonlinear isolator can be realized by combining positive stiffness with negative stiffness, so as to form a stiffness close to zero at the working point, which is called quasi-zero stiffness characteristic in practical engineering.

[0003] The existing quasi-zero stiffness vibration isolation device mostly realizes ideal zero stiffness at the static force balance position, and when disturbance load appears in the vibration isolation structure, there will be a large disturbance, which affects the stability of the system. SUMMARY

[0004] The application provides a horizontal multi-stage stiffness vibration isolation device with damping, which provides positive stiffness based on the initial stage, and provides quasi-zero stiffness through parallel connection of positive and negative stiffness mechanisms after reaching the preset displacement, so as to meet the needs of practical engineering.

[0005] The technical scheme adopted by the application to solve the technical problem is: a horizontal multi-stage stiffness vibration isolation device with damping, comprising a bottom plate, a bearing plate, a negative stiffness mechanism and a positive stiffness mechanism, wherein:

[0006] The bottom plate is placed on a working surface, two guide rails are arranged on the top surface of the bottom plate along the two longer sides of the bottom plate, a transmission block is arranged in the middle of the bottom plate, and the transmission block can move linearly along the top surface of the bottom plate;

[0007] The bearing plate is arranged in parallel above the bottom plate, four limiting sliding blocks are arranged on the bottom surface of the bearing plate at four corners, and the four limiting sliding blocks are arranged along the length direction of the bearing plate;

[0008] The limiting sliding blocks are in sliding connection with the guide rails, and the four limiting sliding blocks can slide back and forth along the two guide rails;

[0009] The negative stiffness mechanism and the positive stiffness mechanism are arranged between the bottom plate and the bearing plate, the negative stiffness mechanism is arranged between the four limiting sliding blocks, and the positive stiffness mechanism is arranged on the side away from the negative stiffness mechanism of the four limiting sliding blocks;

[0010] The negative stiffness mechanism includes a central connecting block and four sets of pre-compressed horizontal inclined steel springs. The central connecting block is mounted on the transmission block, and the four sets of horizontal inclined steel springs are arranged horizontally and symmetrically around the central connecting block. The four sets of horizontal inclined steel springs have the same compression stroke.

[0011] The positive stiffness mechanism includes two baffles, four sets of steel springs, and two slide rods. The baffles are set on the base plate and are located on the side of the guide rail facing the external environment. Each baffle is equipped with a set of steel springs on both sides. The slide rods are set parallel to the side of the guide rail facing the external environment and each slide rod passes through two sets of steel springs and one baffle.

[0012] By adjusting the stiffness ratio α between the steel spring in the positive stiffness mechanism and the horizontal inclined steel spring in the negative stiffness mechanism, the actual pre-compression coefficient of the horizontal inclined steel spring in the negative stiffness mechanism is... Compression stroke of pre-compressed horizontal inclined steel spring in negative stiffness mechanism The relationship between the three factors results in different quasi-zero stiffness mechanical properties, thereby achieving corresponding vibration isolation effects.

[0013] Taking the direction in which the transmission block can move as the X-axis, the pre-compression coefficient of the horizontally inclined steel spring in the X-axis is: The linear stiffness coefficient of the horizontally inclined steel spring in the X direction is The linear stiffness coefficient of the X-direction steel spring is , α、 , The three parameters must satisfy formula (1):

[0014] (1)

[0015] In formula (1), .

[0016] As a further preferred embodiment of the invention, it also includes four sliders, with two sliders mounted on each guide rail. The sliders slide freely on the guide rail, and each slider is connected to a set of horizontally inclined steel springs.

[0017] As a further preferred embodiment of the present invention, the negative stiffness mechanism further includes a piston rod and a piston sleeve, one end of the piston rod being connected to a central connecting block and the other end being located inside the piston sleeve; one end of the piston sleeve being connected to a slider; and a horizontally inclined steel spring being sleeved on the piston sleeve and the piston rod.

[0018] As a further preferred embodiment of the present invention, it also includes four support plates, which are disposed on the side of the limiting slider away from the negative stiffness mechanism, and the two ends of the slider are respectively connected to one support plate.

[0019] As a further preferred embodiment of the present invention, the limiting slider is detachably connected to the carrier plate.

[0020] As a further preferred embodiment of the invention, the slide bar is fixed to two support plates by screw bolts.

[0021] As a further preferred embodiment of the present invention, the piston sleeve is hinged to the slider by a round-headed bolt.

[0022] As a further preferred embodiment of the present invention, the distance between the two limiting sliders on the same guide rail restricts the compression displacement stroke of the negative stiffness mechanism, and the adjustment of the distance between the two limiting sliders on the same guide rail is achieved by adjusting the installation position of the limiting sliders on the bearing plate.

[0023] As a further preferred embodiment of the present invention, a waist hole is provided in the middle of the central connecting block, and the transmission block is located in the waist hole, and the transmission block moves linearly within the waist hole of the central connecting block.

[0024] As a further preferred embodiment of the present invention, in formula (1), the actual pre-compression coefficient of the horizontal inclined steel spring in the negative stiffness mechanism is... Compression stroke of horizontally inclined steel spring in negative stiffness mechanism The calculation methods are as follows: Formula (2) and Formula (3):

[0025] (2)

[0026] (3)

[0027] In formulas (2) and (3), The distance between the two ends of the horizontally inclined steel spring in the negative stiffness mechanism along the width direction of the base plate. It represents the distance between the two ends of the horizontally inclined steel spring in the negative stiffness mechanism along the length of the base plate.

[0028] By employing the above technical solutions, the present invention has the following beneficial effects compared to the prior art:

[0029] 1. The device of the present invention can achieve a nonlinear vibration isolation effect with high static stiffness and low dynamic stiffness by adjusting the pre-compression coefficient of the horizontal inclined steel spring in the negative stiffness mechanism, the stiffness ratio of the horizontal inclined steel spring in the negative stiffness mechanism to the steel spring in the positive stiffness mechanism, and the vertical compression stroke of the steel spring in the negative stiffness mechanism, so that the device maintains quasi-zero stiffness characteristics at a preset displacement.

[0030] 2. The spacing of the limiting sliders in the device of the present invention restricts the compression displacement stroke of the negative stiffness mechanism, so that the device does not fail due to excessive offset of the elastic element, and effectively improves the stability of the vibration isolation system.

[0031] 3. The device of the present invention sets a viscous damping fluid in the space formed by the piston rod and the piston sleeve. When the piston rod moves in the piston sleeve, the turbulence of the internal viscous damping fluid can absorb part of the energy. The additional damping and the horizontal tilting steel spring work together to solve the problem of horizontal displacement amplification caused by a single quasi-zero stiffness, so that the displacement can be effectively controlled.

[0032] 4. The present invention can adjust the distance between the transmission block and the central connecting block by adding a screw bolt, so that the device provides positive stiffness in the designed initial displacement stage, and provides quasi-zero stiffness through the parallel connection of positive and negative stiffness mechanisms after reaching the preset displacement, thereby obtaining different multi-level stiffness mechanical properties to meet the needs of different practical engineering.

[0033] 5. The device of the present invention adopts convenient mechanical design and assembly, reducing the requirements for processing and manufacturing. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is the present invention. Figure 1 A magnified view of part A in the middle;

[0037] Figure 3 This is a schematic diagram of the exploded structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the parameter markings in formulas (1) to (3) of this invention.

[0039] In the diagram: 1-bearing plate, 2-piston sleeve, 3-slider, 4-center connecting block, 5-piston rod, 6-horizontal inclined steel spring, 7-round head bolt, 8-steel spring, 9-transmission block, 10-baffle, 11-slide rod, 12-guide rail, 13-support plate, 14-bolt, 15-base plate, 16-limit slider. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0041] In the description of this invention, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of this invention. Example 1

[0042] This embodiment provides a preferred implementation, a horizontal multi-stage stiffness vibration isolation device with damping, such as... Figures 1 to 4 As shown, this vibration isolation device includes a base plate 15, a bearing plate 1, a negative stiffness mechanism, and a positive stiffness mechanism, wherein:

[0043] The aforementioned base plate 15 is placed on the working surface. Two guide rails 12 are arranged on the top surface of the base plate 15, along the two longer sides of the base plate 15. A transmission block 9 is arranged in the middle of the base plate 15, and the transmission block 9 can move linearly along the top surface of the base plate 15. The aforementioned support plate 1 is arranged parallel above the base plate 15. Four limiting sliders 16 are arranged at the four corners of the bottom surface of the support plate 1, and all four limiting sliders 16 are arranged along the length direction of the support plate 1. The limiting sliders 16 are slidably connected to the guide rails 12, and the four limiting sliders 16 can slide back and forth along the two guide rails 12.

[0044] A negative stiffness mechanism and a positive stiffness mechanism are provided between the base plate 15 and the bearing plate 1. The negative stiffness mechanism is located between the four limiting sliders 16, and the positive stiffness mechanism is located on the side of the four limiting sliders 16 away from the negative stiffness mechanism.

[0045] This implementation scheme also includes four sliders 3, with two sliders 3 installed on each guide rail 12. The sliders 3 can slide freely on the guide rail 12, and each slider 3 is connected to the negative stiffness mechanism.

[0046] The aforementioned negative stiffness mechanism includes a central connecting block 4 and four sets of pre-compressed horizontal inclined steel springs 6. The central connecting block 4 is mounted on the transmission block 9. The four sets of horizontal inclined steel springs 6 are horizontally symmetrically arranged around the central connecting block 4. The four sets of horizontal inclined steel springs 6 have the same compression stroke, and the four sets of pre-compressed horizontal inclined steel springs 6 have the same stiffness characteristics and compression coefficient, which simplifies the device parameters to achieve quasi-zero stiffness characteristics. Specifically, the negative stiffness mechanism also includes a piston rod 5 and a piston sleeve 2. One end of the piston rod 5 is connected to the central connecting block 4, and the other end is located inside the piston sleeve 2. One end of the piston sleeve 2 is connected to a slider 3. The horizontal inclined steel springs 6 are mounted on the piston sleeve 2 and the piston rod 5. Preferably, the piston rod 5 is hinged to the central connecting block 4 by bolts 14; the piston sleeve 2 is hinged to the slider 3 by round-headed bolts 7.

[0047] The aforementioned positive stiffness mechanism includes two baffles 10, four sets of steel springs 8, and two slide rods 11. The baffles 10 are mounted on the base plate 15, positioned on the side of the guide rail 12 facing the external environment. Each baffle 10 has a set of steel springs 8 on both sides. The slide rods 11 are parallel to the guide rail 12 on the side facing the external environment, and each slide rod 11 passes through two sets of steel springs 8 and one baffle 10. This embodiment also includes four support plates 13, which are positioned on the side of the limiting slider 16 away from the negative stiffness mechanism, and each end of the slide rod 11 is connected to one support plate 13.

[0048] Specifically, the four sets of steel springs 8 all use the same stiffness coefficient and are symmetrically arranged on both sides of the guide rail 12 and the limiting slider 16 to prevent uneven compression movement of the bearing plate 1 after the vibration isolation object is placed on it, while also simplifying the design parameters. The inner diameter of the steel spring 8 is 1mm to 2mm larger than the inner diameter of the slide rod 11. A diameter greater than 2mm will cause instability of the steel spring 8 during compression, while a diameter less than 1mm will cause unnecessary friction during compression. The left and right ends of the steel spring 8 should be ground smooth to prevent eccentric force from being generated after contacting the baffle 10 and the support plate 13. In addition, a nylon sleeve or linear bearing can be added to the part of the slide rod 11 that passes through the baffle 10 to reduce friction during horizontal compression movement. The slide rod 11 can be fixed to the support plates 13 at both ends by screw bolts for easy assembly and disassembly, which helps maintain the stability of the steel spring 8 of the positive stiffness mechanism during compression.

[0049] When the base plate 15 is displaced, the transmission block 9 and the baffle 10 move along with the base plate 15. The negative stiffness mechanism moves with the transmission block 9, and the positive stiffness mechanism moves with the baffle 10, thereby driving the bearing plate 1, which is equipped with four limit sliders 16, to move along the two guide rails 12.

[0050] The design of the quasi-zero stiffness characteristics of this vibration isolation device mainly depends on three parameters: the stiffness ratio of the steel spring 8 of the positive stiffness mechanism and the horizontal inclined steel spring 6 of the negative stiffness mechanism, the pre-compression coefficient of the horizontal inclined steel spring 6 of the negative stiffness mechanism, and the vertical compression stroke of the horizontal inclined steel spring 6 of the negative stiffness mechanism. By adjusting the specific relationship between the three, different quasi-zero stiffness mechanical properties can be obtained, thereby achieving a multi-functional vibration isolation effect.

[0051] In this embodiment, the limiting slider 16 is detachably connected to the support plate 1. The distance between the two limiting sliders 16 on the same guide rail 12 limits the compression displacement stroke of the negative stiffness mechanism. The distance between the two limiting sliders 16 on the same guide rail 12 can be adjusted by adjusting the installation position of the positioning bolts connected to the support plate 1. Preferably, the distance between the two limiting sliders 24 on the guide rail 23 is adjusted by adjusting the installation position of the limiting sliders 16 on the support plate 1; specifically, the installation and installation position adjustment between the limiting sliders 24 and the support plate 1 can be achieved by setting positioning bolts and several mounting holes.

[0052] In this embodiment, a viscous damping fluid is placed in the space formed by the piston rod 5 and the piston sleeve 2. When the piston rod 5 moves within the piston sleeve 2, the turbulence of the internal viscous damping fluid absorbs some of the energy. The additional damping, in conjunction with the horizontal tilting steel spring 6, solves the problem of horizontal displacement amplification caused by a single quasi-zero stiffness, thus enabling effective displacement control.

[0053] In this embodiment, a waist hole is formed in the middle of the central connecting block 4, and the transmission block 9 is located inside the waist hole. The transmission block 9 can move linearly within the waist hole of the central connecting block 4. By adjusting the initial position of the transmission block 9 in the waist hole of the central connecting block 4, the vibration isolation device can obtain different multi-level stiffness characteristics for application in different vibration isolation scenarios. Preferably, an additional lead screw is used to adjust the initial position of the transmission block 9 in the waist hole of the central connecting block 4.

[0054] When the base plate 15 is displaced, the transmission block 9 and the baffle 10 move along with the base plate 15. The negative stiffness mechanism moves with the transmission block 9, and the positive stiffness mechanism moves with the baffle 10, thereby driving the bearing plate 1, which is equipped with four limit sliders 16, to move along the two guide rails 12.

[0055] This implementation scheme connects the positive stiffness mechanism and the negative stiffness mechanism in parallel through a transmission mechanism, which consists of a guide rail 12, a slider 3, a limiting slider 16, and a transmission block 9. After the vibration isolation device is installed, under the action of ground movement or horizontal vibration generated by the isolated object, the positive stiffness mechanism first works alone in the designed initial displacement stage to provide positive stiffness. After reaching the preset displacement, the negative stiffness mechanism and the positive stiffness mechanism simultaneously generate horizontal compressive motion through the connection of the transmission mechanism to provide quasi-zero stiffness, so that the system as a whole exhibits multi-level stiffness characteristics. By adjusting the position of the transmission block 9 in the waist hole of the central connecting block 4 by adding a screw bolt, different multi-level stiffness mechanical properties can be obtained to meet the needs of different practical engineering projects.

[0056] This implementation scheme adjusts the stiffness ratio α between the steel spring 8 in the positive stiffness mechanism and the horizontal inclined steel spring 6 in the negative stiffness mechanism, and the actual pre-compression coefficient of the horizontal inclined steel spring 6 in the negative stiffness mechanism. The compression stroke of the horizontal inclined steel spring 6 in the negative stiffness mechanism The relationship between these three factors can yield different quasi-zero stiffness mechanical properties, achieving corresponding vibration isolation effects, as detailed below:

[0057] like Figure 4 As shown, taking the direction in which the transmission block 9 can move as the X-axis, the pre-compression coefficient of the horizontally inclined steel spring 6 in the X-axis is... The linear stiffness coefficient of the horizontally inclined steel spring 6 in the X direction is The linear stiffness coefficient of the X-direction steel spring 8 is , α、 , The three parameters must satisfy formula (1):

[0058] (1)

[0059] In formula (1), The actual pre-compression coefficient of the horizontal inclined steel spring 6 in the negative stiffness mechanism. Compression stroke of the horizontal inclined steel spring 6 in the negative stiffness mechanism The calculation methods are as follows: Formula (2) and Formula (3):

[0060] (2)

[0061] (3)

[0062] In formulas (2) and (3), The distance between the two ends of the horizontally inclined steel spring 6 in the negative stiffness mechanism along the width direction of the base plate. The distance between the two ends of the horizontally inclined steel spring 6 in the negative stiffness mechanism along the length of the base plate.

[0063] During the adjustment process, the parameters that are known in advance are: a, , ,according to , We can obtain α. Substituting the obtained α into formula (1), we get the desired result. Then adjust the position of slider 3 on guide rail 12, and adjust the value. The optimal assembly state of this vibration reduction device under the current working conditions is obtained.

[0064] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0065] The meaning of "and / or" as used in this application includes situations where each exists alone or both exist simultaneously.

[0066] The term "connection" as used in this application can mean a direct connection between components or an indirect connection between components through other components.

[0067] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A horizontal multi-stage stiffness vibration isolation device with damping, characterized in that: Includes a base plate (15), a bearing plate (1), a negative stiffness mechanism, and a positive stiffness mechanism, wherein: The base plate (15) is placed on the working surface. Two guide rails (12) are set on the top surface of the base plate (15). The two guide rails (12) are arranged along the two longer sides of the base plate (15). A transmission block (9) is set in the middle of the base plate (15). The transmission block (9) can move linearly along the top surface of the base plate (15). The support plate (1) is set parallel above the base plate (15), and four limiting sliders (16) are set at the four corners of the bottom surface of the support plate (1). The four limiting sliders (16) are arranged along the length of the support plate (1). The limit sliders (16) are slidably connected to the guide rails (12), and the four limit sliders (16) can slide back and forth along the two guide rails (12); A negative stiffness mechanism and a positive stiffness mechanism are provided between the base plate (15) and the bearing plate (1). The negative stiffness mechanism is provided between the four limiting sliders (16), and the positive stiffness mechanism is provided on the side of the four limiting sliders (16) away from the negative stiffness mechanism. The negative stiffness mechanism includes a central connecting block (4) and four sets of pre-compressed horizontal inclined steel springs (6). The central connecting block (4) is mounted on the transmission block (9). The four sets of horizontal inclined steel springs (6) are arranged horizontally and symmetrically around the central connecting block (4). The four sets of horizontal inclined steel springs (6) have the same compression stroke. The positive stiffness mechanism includes two baffles (10), four sets of steel springs (8), and two slide rods (11). The baffles (10) are set on the base plate (15) and are located on the side of the guide rail (12) facing the external environment. Each baffle (10) has a set of steel springs (8) on both sides. The slide rods (11) are set parallel to the side of the guide rail (12) facing the external environment. Each slide rod (11) passes through two sets of steel springs (8) and one baffle (10). By adjusting the stiffness ratio α between the steel spring (8) in the positive stiffness mechanism and the horizontal inclined steel spring (6) in the negative stiffness mechanism, the actual pre-compression coefficient of the horizontal inclined steel spring (6) in the negative stiffness mechanism is... The compression stroke of the pre-compressed horizontal inclined steel spring (6) in the negative stiffness mechanism The relationship between the three factors results in different quasi-zero stiffness mechanical properties, thereby achieving corresponding vibration isolation effects. Taking the direction in which the transmission block (9) can move as the X direction, the pre-compression coefficient of the horizontally inclined steel spring (6) in the X direction is: The linear stiffness coefficient of the horizontally inclined steel spring (6) in the X direction is The linear stiffness coefficient of the X-direction steel spring (8) is , α、 , The three parameters must satisfy formula (1): （1） In formula (1), .

2. The horizontal multi-stage stiffness vibration isolation device with damping according to claim 1, characterized in that: It also includes four sliders (3), with two sliders (3) mounted on each guide rail (12). The sliders (3) slide freely on the guide rail (12), and each slider (3) is connected to a set of horizontally inclined steel springs (6).

3. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 2, characterized in that: The negative stiffness mechanism also includes a piston rod (5) and a piston sleeve (2). One end of the piston rod (5) is connected to the central connecting block (4), and the other end is inside the piston sleeve (2). One end of the piston sleeve (2) is connected to a slider (3). A horizontally inclined steel spring (6) is sleeved on the piston sleeve (2) and the piston rod (5).

4. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 3, characterized in that: It also includes four support plates (13), which are set on the side of the limiting slider (16) away from the negative stiffness mechanism, and the two ends of the slider (11) are respectively connected to a support plate (13).

5. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 4, characterized in that: The limiting slider (16) is detachably connected to the carrier plate (1).

6. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 4, characterized in that: The slide bar (11) is fixed to the two support plates (13) by screw bolts.

7. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 4, characterized in that: The piston sleeve (2) is hinged to the slider (3) by a round head bolt (7).

8. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 5, characterized in that: The distance between the two limiting sliders (16) on the same guide rail (12) limits the compression displacement stroke of the negative stiffness mechanism. The adjustment of the distance between the two limiting sliders (16) on the same guide rail (12) is achieved by adjusting the installation position of the limiting sliders (16) on the bearing plate (1).

9. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 4, characterized in that: A waist hole is opened in the middle of the central connecting block (4), and the transmission block (9) is located in the waist hole. The transmission block (9) moves linearly in the waist hole of the central connecting block (4).

10. A horizontal multi-stage stiffness vibration isolation device with damping according to claim 1, characterized in that: In formula (1), the actual pre-compression coefficient of the horizontal inclined steel spring (6) in the negative stiffness mechanism is... Compression stroke of the horizontal inclined steel spring (6) in the negative stiffness mechanism The calculation methods are as follows: Formula (2) and Formula (3): （2） （3） In formulas (2) and (3), The distance between the two ends of the horizontally inclined steel spring (6) in the negative stiffness mechanism in the width direction of the base plate (15) is denoted as . The distance between the two ends of the horizontally inclined steel spring (6) in the negative stiffness mechanism along the length of the base plate (15) is denoted as .

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