CN110388408A - A negative stiffness adjustable zero stiffness vibration isolation device and its application method - Google Patents

Abstract

The invention discloses a negative-stiffness adjustable zero-stiffness vibration isolation device and an application method thereof. The negative-stiffness adjustable zero-stiffness vibration isolation device includes a bearing platform, a positive stiffness mechanism is arranged on the lower side of the bearing platform, and the surroundings of the bearing platform are connected There are a plurality of adjustable negative stiffness mechanisms arranged symmetrically in the center, the positive stiffness mechanism includes vertical elastic elements for supporting the bearing platform, and the adjustable negative stiffness mechanism includes horizontal elastic elements for applying horizontal force to the bearing platform; application method The method includes adjusting each height adjustment mechanism to make the horizontal elastic element level after the load is installed on the bearing platform. The invention can flexibly adjust the negative stiffness according to the load at any time, so that the negative stiffness can be adjusted according to the actual situation after the load is loaded. The adjustable zero-stiffness vibration isolation device ensures that the dynamic stiffness is close to zero under the static load state after installation on site. state, can avoid the failure of the vibration isolation system, and has the advantages of simple structure, easy processing, convenient assembly and disassembly, reasonable design and easy adjustment.

Description

A negative stiffness adjustable zero stiffness vibration isolation device and its application method

technical field

The invention relates to vibration control technology, in particular to a negative stiffness adjustable zero stiffness vibration isolation device and an application method thereof.

Background technique

The traditional linear vibration isolation method is only effective when the excitation frequency is greater than √2 times the fixed frequency of the vibration isolation system. If low frequency vibration is to be isolated, the system stiffness needs to be very low, which will affect the installation stability of the mechanical system. Therefore, low-frequency vibration isolation is still a major problem in the field of vibration engineering. On the basis of traditional vibration isolators, a negative stiffness mechanism/structure is introduced to form a quasi-zero stiffness vibration isolator, which can not only bear the weight of the equipment without large deformation, but also has extremely low dynamic stiffness near the static equilibrium position, which is an ideal passive vibration isolators.

In the actual use process, after determining the mass to be carried by the quasi-zero-stiffness vibration isolation structure, the parameters such as the stiffness and position size of the elastic elements in the structure will be determined through calculations. Once determined, if the design load-bearing mass occurs If the actual static equilibrium position of the quasi-zero stiffness realization mechanism deviates from the ideal static equilibrium position determined during design, the horizontal elastic The element cannot remain in a nearly horizontal position, nor can its compressed length be guaranteed to be equal to the preset value. Through the analysis, it can be known that when the static equilibrium position of the quasi-zero stiffness mechanism deviates from the preset point, the quasi-zero stiffness mechanism cannot guarantee that the dynamic stiffness is close to zero. The zero-stiffness vibration isolation structure fails, affecting the stability of the equipment. Therefore, it is necessary to propose a negative stiffness realization mechanism that can be flexibly adjusted according to the load at any time, so that the quasi-zero stiffness realization mechanism can be adjusted according to the actual situation after the load is loaded, ensuring that the quasi-zero stiffness can be adjusted under static load after on-site installation. The zero-stiffness mechanism is in an ideal state where the dynamic stiffness is close to zero.

Contents of the invention

The technical problem to be solved by the present invention: Aiming at the above-mentioned problems of the prior art, a negative-stiffness adjustable zero-stiffness vibration isolation device and its application method are provided. The direction adjusts the position of the height adjustment mechanism so that the horizontal elastic element maintains the preset compression amount, and the negative stiffness can be adjusted flexibly so that it can be adjusted according to the actual situation after loading. The negative stiffness can be adjusted with zero stiffness vibration isolation device to ensure on-site installation Finally, it is in an ideal state where the dynamic stiffness is close to zero under the static load state, which can avoid the failure of the vibration isolation system.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

The invention provides a zero-stiffness vibration isolation device with adjustable negative stiffness. mechanism, the positive stiffness mechanism includes a vertical elastic element for supporting the bearing platform, the adjustable negative stiffness mechanism includes a horizontal elastic element, a cage and a height adjustment mechanism, and one end of the horizontal elastic element is hingedly connected to the height adjustment mechanism , and the other end is directly or indirectly connected to the carrying platform.

Optionally, the cage is provided with a chute arranged in the vertical direction, the height adjustment mechanism includes a screw and a slider, the screw is installed on the cage in the vertical direction and can rotate freely, The slider is arranged in the chute and threadedly engaged with the lead screw, and the horizontal elastic element is hinged to the slider.

Optionally, the sliding groove is a dovetail groove, and the bottom of the slider is embedded in the dovetail groove.

Optionally, one end of the chute is provided with a notch for taking out the slider.

Optionally, one end of the horizontal elastic element is provided with a first connecting rod, and the other end is provided with a second connecting rod, and one end of the horizontal elastic element is hingedly connected through the first connecting rod and the first hinge seat on the height adjustment mechanism, The other end is hingedly connected to the carrying platform through the second connecting rod.

Optionally, a sleeve is sheathed on the outside of the horizontal elastic element.

Optionally, one end of the sleeve is closed and fixedly connected to the first connecting rod, the other end is open and a piston rod is provided inside to slide with the inner wall of the sleeve, and one end of the horizontal elastic element is fixedly connected to the closed end of the sleeve. , and the other end is connected with the second connecting rod through the piston rod.

Optionally, a horizontal scale is provided on the sleeve.

Optionally, the horizontal elastic element is a spring, or an elastic air bag, or a pair of magnet blocks.

Optionally, the vertical elastic element is a spring, or an elastic air bag, or a pair of magnet blocks.

Optionally, the positive stiffness mechanism includes a base, and the lower end of the vertical elastic element is connected and fixed to the base.

Optionally, the lower part of the carrying platform is also provided with a connecting seat, the upper end of the vertical elastic element is connected and fixed with the connecting seat, and a plurality of second hinged seats are arranged around the connecting seat, and the plurality of hinged seats can be The negative stiffness adjustment mechanism is hingedly connected with the second hinged seats around the connecting seat respectively.

Optionally, through holes for installing and fixing objects to be carried are provided around the carrying platform.

The present invention provides an application method of the aforesaid zero-stiffness vibration isolation device with adjustable negative stiffness. Adjust to the horizontal state, so that each horizontal elastic element maintains the preset compression amount; when the load is disturbed by the outside world at the working balance position, the elastic potential energy stored in each horizontal elastic element is released, and the direction of the external disturbance force is the same Force, so as to offset part of the energy required for the deformation of the vertical elastic element, and finally play a role in isolating the vibration of the loaded object from being transmitted to the outside.

Optionally, the functional expression of each horizontal elastic element to maintain a preset amount of compression is shown in formula (1);

In the formula (1), λ is the predetermined amount of compression maintained by each horizontal elastic element (30), n is the number of horizontal elastic elements and n is an even number, and L is the rigid connection part between the horizontal elastic element and the bearing platform. Length, K ₁ is the stiffness of the vertical elastic element, K ₂ is the stiffness of the horizontal elastic element.

Compared with the prior art, the negative stiffness adjustable zero stiffness vibration isolation device of the present invention has the following advantages:

1. The lower side of the carrying platform of the present invention is provided with a positive stiffness mechanism, and a plurality of adjustable negative stiffness mechanisms arranged symmetrically around the center are connected around the carrying platform. The positive stiffness mechanism includes a vertical elastic element for supporting the carrying platform. The adjustable negative stiffness mechanism includes a horizontal elastic element, a cage, and a height adjustment mechanism. One end of the horizontal elastic element is hingedly connected to the height adjustment mechanism, and the other end is directly or indirectly connected to the bearing platform. After the positive stiffness mechanism carries the loaded object The position of the height adjustment mechanism can be adjusted along the bearing force direction, so that the horizontal elastic element maintains the preset compression amount, and the negative stiffness can be adjusted flexibly, so that the negative stiffness can be adjusted according to the actual situation after loading. The zero stiffness vibration isolation can be adjusted. The device ensures that the dynamic stiffness is close to zero in an ideal state with static load after on-site installation, which can avoid the failure of the vibration isolation system.

2. The vibration isolation device with adjustable negative stiffness and zero stiffness of the present invention has a simple structure, is easy to process and install on site, and is low in cost, so it is suitable for popularization and application.

The application method of the negative stiffness adjustable zero stiffness vibration isolation device of the present invention is the use method of the aforementioned negative stiffness adjustable zero stiffness vibration isolation device of the present invention, so it also has the advantages of the negative stiffness adjustable zero stiffness vibration isolation device of the present invention the aforementioned advantages.

Description of drawings

FIG. 1 is a schematic perspective view of the three-dimensional structure of an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the three-dimensional structure of the adjustable negative stiffness mechanism and the elastic element in the embodiment of the present invention.

Fig. 3 is a schematic diagram of the three-dimensional structure of the slider in the embodiment of the present invention.

Fig. 4 is a schematic diagram of the vibration isolation principle of the embodiment of the present invention.

Legend: 1. Bearing platform; 11. Connecting seat; 111. Second hinged seat; 12. Through hole; 2. Positive stiffness mechanism; 20. Vertical elastic element; 21. Base; 3. Adjustable negative stiffness mechanism; 30, horizontal elastic element; 301, first connecting rod; 302, second connecting rod; 303, sleeve; 304, piston rod; 305, horizontal scale; 31, cage; 311, chute; 312, gap; 32. The height adjustment mechanism; 321. The screw rod; 322. The slide block; 323. The first hinge seat.

Detailed ways

As shown in Figures 1 and 2, this embodiment provides a negative stiffness adjustable zero-stiffness vibration isolation device, which includes a bearing platform 1, a positive stiffness mechanism 2 is provided on the lower side of the bearing platform 1, and the surroundings of the bearing platform 1 are connected with Four adjustable negative stiffness mechanisms 3 symmetrically arranged in the center (in addition, it can also be arranged as three or more as required), the positive stiffness mechanism 2 includes a vertical elastic element 20 for supporting the bearing platform 1, and the adjustable negative stiffness The mechanism 3 includes a horizontal elastic element 30 , a cage 31 and a height adjustment mechanism 32 , one end of the horizontal elastic element 30 is hingedly connected to the height adjustment mechanism 32 , and the other end is directly or indirectly connected to the carrying platform 1 . The negative-stiffness adjustable zero-stiffness vibration isolation device of this embodiment can flexibly adjust the height adjustment mechanism 32 according to the load at any time to achieve the purpose of negative stiffness adjustment, so that the negative-stiffness adjustable zero-stiffness isolator can be adjusted according to the actual situation after loading The vibration device ensures that the dynamic stiffness is close to zero under static load after installation on site, and can avoid the failure of the vibration isolation system. It has the advantages of simple structure, easy processing, convenient loading and unloading, reasonable design and easy adjustment.

As shown in Figure 1, a connecting seat 11 is also provided at the bottom of the carrying platform 1, and the upper end of the vertical elastic element 20 is connected and fixed with the connecting seat 11, and a plurality of second hinged seats 111 are arranged around the connecting seat 11, and a plurality of hinge seats 111 can be arranged. The negative stiffness adjustment mechanism 3 is hingedly connected with the second hinged seat 111 around the connecting seat 11 respectively. The above-mentioned structure facilitates the installation and fixing between the positive stiffness mechanism 2 and the bearing platform 1, and the horizontal elastic element 30 is indirectly connected with the bearing platform 1. In addition, the carrying platform 1 and the connecting seat 11 can also be designed in an integrated manner as required, so that the horizontal elastic element 30 is directly connected to the carrying platform 1 .

As shown in FIG. 1 , through holes 12 for installing and fixing the object to be carried are provided around the carrying platform 1 , so that the object to be carried can be fixed to it by bolts.

The positive stiffness mechanism 2 plays the role of main bearing. As shown in FIG. 1 , the positive stiffness mechanism 2 includes a base 21 , and the lower end of the vertical elastic element 20 is connected and fixed to the base 21 . Through the above structure, the installation and fixation of the positive stiffness mechanism 2 and the connection and installation of the vertical elastic element 20 are facilitated.

In this embodiment, the vertical elastic element 20 is a spring (steel compression spring). In addition, an elastic airbag or a pair of magnet blocks can also be used as required (using the attraction or repulsion between the magnets to achieve stiffness adjustment).

As shown in Figures 1 and 2, the cage 31 is provided with a chute 311 arranged in the vertical direction, and the height adjustment mechanism 32 includes a screw rod 321 and a slider 322, and the screw rod 321 is installed on the cage 31 in the vertical direction. and can rotate freely, the slider 322 is arranged in the sliding groove 311 and is screwed with the screw rod 321 , and the horizontal elastic element 30 and the slider 322 are hinged. After the height adjustment mechanism 32 is assembled, the slider 322 can slide up and down in the cage 31 by turning the screw 321, thereby realizing the height adjustment of the horizontal elastic element 30 to ensure that the horizontal elastic element 30 is adjusted to a horizontal state. The horizontal elastic element 30 has the ability to deform, and only when the horizontal elastic element 30 is in a horizontal state, can the field-installed negative-stiffness adjustable zero-stiffness vibration isolator be in an ideal state with a dynamic stiffness close to zero under a static load state.

As shown in Figure 2, the lower end of the screw rod 321 is placed in the blind hole of the cage 31, the upper end runs through the through hole of the cage 31, and the end of the screw rod 321 is provided with an inner hexagon adjustment hole, so that the screw can be rotated by an inner hexagonal tool. The rod 321 can make the slider 322 slide up and down in the dovetail groove of the cage 31; in addition, the blind hole and the through hole of the cage 31 can further install bearings as required to reduce rotation resistance. In this embodiment, an annular retaining spring is provided on the threaded upper end of the threaded rod 321 to limit the threaded rod 321 in the holder 31 to prevent it from falling off.

As shown in FIG. 2 and FIG. 3 , the chute 311 is a dovetail groove, and the bottom of the slider 322 is embedded in the dovetail groove. The inner surface of the dovetail groove is smooth, and the cross-section of the bottom of the slider 322 is trapezoidal so that the dovetail groove can be embedded and arranged in the dovetail groove. The sliding structure of the dovetail groove can ensure that the slider 322 can slide and can bear a large stress, and The component force generated by the slope of the dovetail groove under the stressed state will make the slider 322 have a relatively large frictional support force in the horizontal direction at this height.

As shown in FIG. 2 , one end of the chute 311 is provided with a notch 312 for taking out the slider 322 , which facilitates the installation and disassembly of the chute 323 . As shown in Figure 2, one end of the horizontal elastic element 30 is provided with a first connecting rod 301, and the other end is provided with a second connecting rod 302. The seat 323 is hingedly connected, and the other end is hingedly connected to the carrying platform 1 through the second connecting rod 302, so that both ends of the horizontal elastic element 30 can automatically rotate, which can ensure that the horizontal elastic element 30 can be adjusted by the height adjustment mechanism of each adjustable negative stiffness mechanism. to a horizontal state, so that each horizontal elastic element maintains a preset compression amount.

As shown in FIG. 2 , a sleeve 303 is sheathed on the outside of the horizontal elastic element 30 . The sleeve 303 can protect the horizontal elastic element 30 on the one hand, and limit the horizontal elastic element 30 on the other hand, so as to ensure that the elastic deformation of the horizontal elastic element 30 is stable and reliable. In this embodiment, the sleeve 303 is cylindrical, with one end sealed and the other open. A hinge is provided outside the sealed end to link with the slider 322 . The sleeve 303 can rotate around the hinge within a certain angle range.

As shown in Figure 2, one end of the sleeve 303 is closed and fixedly connected to the first connecting rod 301, the other end is open and the inside is provided with a piston rod 304 slidingly fitted with the inner wall of the sleeve 303, one end of the horizontal elastic element 30 and the sleeve 303 The closed end is connected and fixed, and the other end is connected with the second connecting rod 302 through the piston rod 304 . The piston rod 304 can ensure that the connection between the horizontal elastic element 30 and the second connecting rod 302 is stable, and that the movement is along the axial direction of the sleeve 303 , so that the elastic deformation of the horizontal elastic element 30 is stable and reliable. Since one end of the sleeve 303 is closed and fixedly connected with the first connecting rod 331, when the horizontal elastic element 30 is compressed and deformed, the position of the second connecting rod 302 will change relative to the sleeve 303, and the amount of change can actually represent the level The amount of elastic deformation of the elastic element 30 . In this embodiment, the piston rod 304 is provided with a hinge to be hinged to the horizontal elastic element 30, and is hinged to the side of the connecting seat 23 through the second connecting rod 302, and the horizontal elastic element 30 can rotate around the hinge within a certain angle range.

As shown in FIG. 2 , the sleeve 303 is provided with a horizontal scale 305 , which can indicate the horizontal state of the sleeve 303 in the horizontal state. When the negative-stiffness adjustable zero-stiffness vibration isolation device needs to be adjusted to bear the actual load, the horizontal state of the horizontal elastic element 30 can be visually displayed through the level scale 305, which greatly facilitates the negative-stiffness adjustable zero-stiffness vibration isolator Adjustment work after installation on site. In this embodiment, the horizontal scale 305 is embedded on the outer wall of the sleeve 303 .

In this embodiment, the horizontal elastic element 30 is a spring (steel compression spring). In addition, an elastic airbag or a pair of magnet blocks can also be used as required (using the attraction or repulsion between the magnets to realize stiffness adjustment).

This embodiment provides an application method of the aforementioned adjustable negative stiffness zero-stiffness vibration isolation device. The implementation steps include: installing and fixing the object to be carried on the carrier platform 1, through the height adjustment mechanism 32 of each adjustable negative stiffness mechanism 3 Adjust the horizontal elastic elements 30 to a horizontal state, so that each horizontal elastic element 30 maintains a preset compression amount; when the loaded object is disturbed by the outside world at the working balance position, the elastic potential energy stored in each horizontal elastic element 30 is released, Generate a force in the same direction as the external disturbance force, thereby offsetting part of the energy required for the deformation of the vertical elastic element 20, and finally play a role in isolating the vibration of the loaded object from being transmitted to the outside.

In this embodiment, each horizontal elastic element 30 maintains a function expression of a preset compression amount as shown in formula (1);

In formula (1), λ is the preset compression amount maintained by each horizontal elastic element (30), n is the number of horizontal elastic elements 30 and n is an even number, and L is the rigidity between the horizontal elastic element 30 and the bearing platform 1 The length of the connecting part, K ₁ is the stiffness of the vertical elastic element 20 , and K ₂ is the stiffness of the horizontal elastic element 30 .

When the negative-stiffness adjustable zero-stiffness vibration isolation device is assembled and applied in the field, there is often a certain error between the actual load and the design load, and when the actual load is connected to other external components, some unexpected loads will inevitably be introduced. It will cause the negative stiffness components in the quasi-zero stiffness vibration isolation mechanism to fail to reach the preset ideal position. For this reason, this embodiment provides an application method of the aforementioned negative stiffness adjustable zero-stiffness vibration isolation device. The adjustment steps after installing or replacing the load on the bearing platform 1 include: respectively adjusting the The height adjustment mechanism 32 of each adjustable negative stiffness mechanism 3 finally makes the horizontal elastic elements 30 of each adjustable negative stiffness mechanism 3 be in a horizontal state. Wherein, adjusting the height adjustment mechanism 32 of each adjustable negative stiffness mechanism 3 connected to the positive stiffness mechanism 2 specifically refers to adjusting the screw rod 321 of the adjustable negative stiffness mechanism 3, and adjusting its horizontal position through a horizontal scale 305, Finally, the quasi-zero stiffness mechanism reaches the preset ideal state. In this embodiment, the positive stiffness mechanism 2 and the four adjustable negative stiffness mechanisms 3 are all installed on the same base (not shown in the figure), and the four adjustable negative stiffness mechanisms 3 are symmetrically arranged around the center of the positive stiffness mechanism 2 to form After the two groups of symmetrical negative stiffness adjustment mechanisms are assembled, the horizontal elastic element 30 is in a pre-compressed state, storing a certain amount of elastic potential energy.

The negative-stiffness adjustable zero-stiffness vibration isolator is loaded and the system is in a state of static equilibrium. Ideally, when the load-bearing mass of the adjustable zero-stiffness mechanism is equal to the design mass, the horizontal elastic element 30 should be in a horizontal position, and the horizontal elastic Element 30 is in compression. The equivalent structure of each group of negative stiffness adjustment mechanisms is shown in Figure 4, wherein L is the length of the rigid connection part (specifically the second connecting rod 302 in this embodiment) between the horizontal elastic element 30 and the positive stiffness mechanism 2, K ₁ is the stiffness of the positive stiffness mechanism 2, K ₂ is the stiffness of the adjustable negative stiffness mechanism 3, x is the displacement of the bearing mass M from the static equilibrium position; the external excitation force is F. When the system is in the static equilibrium position (each horizontal elastic element 30 is in a horizontal position), the compression amount of the horizontal elastic element 30 is λ, then there is the force-displacement relationship of the negative stiffness adjustable zero stiffness vibration isolation device proposed in this embodiment The function can be expressed as shown in formula (2);

In formula (2), n is the number of horizontal elastic elements 30 (n is an even number), F is the external excitation force, x is the displacement of the bearing mass M from the static equilibrium position, L is the horizontal elastic element 30 and the positive stiffness mechanism 2 between the length of the rigid connection part (specifically the second connecting rod 302 in this embodiment), K ₁ is the stiffness of the vertical elastic element 20, K ₂ is the stiffness of the horizontal elastic element 30, λ is the horizontal elastic element 30 the amount of compression. According to formula (2), it can be deduced that the functional expression of the equivalent stiffness K _eff of the negative stiffness adjustable zero stiffness vibration isolation device proposed in this embodiment is shown in formula (3);

In formula (3), the meaning of each parameter is detailed in formula (2). Ideally, it is necessary to make the equivalent stiffness K _eff zero when the negative stiffness adjustable zero-stiffness vibration isolator proposed in this embodiment is in the static equilibrium position. At this time, it can be derived according to formula (3) so that each adjustable negative stiffness When the horizontal elastic elements 30 of the mechanism 3 are all in a horizontal state, the functional expression of the compression amount of each horizontal elastic element 30 is shown in formula (1). This means that in order to ensure the quasi-zero stiffness after loading and keep the equivalent stiffness close to zero at the static equilibrium position, it must be ensured that the length of the horizontal elastic elements 30 on both sides is equal to λ in the static equilibrium state.

In the actual use of the traditional quasi-zero-stiffness vibration isolator, after determining the mass to be carried by the quasi-zero-stiffness vibration-isolator, the parameters such as the stiffness and position size of each elastic element in the structure will be determined through calculation. After being determined, if the design load-bearing mass changes, or factors that are not pre-calculated and can change the final load-bearing capacity are added to the load-bearing mass after installation, the actual static equilibrium position of the quasi-zero-stiffness vibration isolator will deviate from the design-determined The ideal static equilibrium position, at this time, the horizontal elastic element cannot be kept in the horizontal position, and its compressed length cannot be guaranteed to be equal to the preset value. Through the analysis, it can be known that when the static equilibrium position of the quasi-zero stiffness mechanism deviates from the preset point, the quasi-zero stiffness vibration isolation device cannot ensure that the dynamic stiffness is close to zero. In the case of serious deviations, the effect of the vibration isolation mechanism may deteriorate sharply. This leads to the failure of the quasi-zero stiffness vibration isolation structure and affects the stability of the equipment. For this reason, this embodiment proposes a negative stiffness adjustable zero-stiffness vibration isolation device that can be flexibly adjusted according to the load at any time, so that the quasi-zero stiffness realization mechanism can be adjusted according to the actual situation after loading, ensuring that after on-site installation, the Under the static load state, the quasi-zero stiffness mechanism can be adjusted to be in an ideal state where the dynamic stiffness is close to zero.

The above descriptions are only preferred implementations of the present invention, and the scope of protection of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the scope of protection of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (15)

1. a kind of negative stiffness can harmonize zero stiffness isolation mounting, it is characterised in that: including plummer (1), the plummer (1) Downside is equipped with positive rigidity mechanism (2), and plummer (1) surrounding is connected with the multiple adjustable negative rigidity mechanisms being centrosymmetrically arranged (3), the positive rigidity mechanism (2) includes the adjustable negative stiffness machine for supporting the vertical elastomeric elements of plummer (1) (20) Structure (3) includes horizontal resiliency element (30), retainer (31) and height adjustment mechanism (32), the horizontal resiliency element (30) One end is articulated and connected with height adjustment mechanism (32), the other end is directly or indirectly connected with plummer (1).

2. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the retainer (31) It is equipped with the sliding slot (311) that is arranged in a vertical direction, the height adjustment mechanism (32) includes screw rod (321) and sliding block (322), The screw rod (321) is mounted on retainer (31) and free to rotate along the vertical direction, and the sliding block (322) is arranged in sliding slot (311) it is threadedly engaged in and with screw rod (321), the horizontal resiliency element (30) and sliding block (322) are hinged.

3. negative stiffness according to claim 2 can harmonize zero stiffness isolation mounting, it is characterised in that: the sliding slot (311) For dovetail groove, the bottom of the sliding block (322), which is embedded, to be arranged in dovetail groove.

4. negative stiffness according to claim 2 can harmonize zero stiffness isolation mounting, it is characterised in that: the sliding slot (311) One end be equipped with notch (312) for taking out sliding block (322).

5. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the horizontal resiliency member Part (30) one end is equipped with first connecting rod (301), the other end is equipped with the second connecting rod (302), the horizontal resiliency element (30) One end is logical by the first hinged seat (323) articulated connection on first connecting rod (301) and height adjustment mechanism (32), the other end It crosses the second connecting rod (302) and plummer (1) is directly or indirectly articulated and connected.

6. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the horizontal resiliency member The outer cover of part (30) is equipped with sleeve (303).

7. negative stiffness according to claim 6 can harmonize zero stiffness isolation mounting, it is characterised in that: the sleeve (303) It is closed at one end and be fixedly connected with first connecting rod (301), another end opening and internal be equipped with is matched with the sliding of sleeve (303) inner wall The closed end of the piston boit (304) of conjunction, described horizontal resiliency element (30) one end and sleeve (303) is connected and fixed, and the other end is logical Piston boit (304) is crossed to be connected with the second connecting rod (302).

8. negative stiffness according to claim 6 can harmonize zero stiffness isolation mounting, it is characterised in that: the sleeve (303) It is equipped with horizontal scale instrument (305).

9. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the horizontal resiliency member Part (30) is spring or elastic balloon or magnet block pair.

10. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the vertical elasticity Element (20) is spring or elastic balloon or magnet block pair.

11. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the positive rigidity machine Structure (2) includes pedestal (21), and lower end and the pedestal (21) of the vertical elastomeric elements (20) are connected and fixed.

12. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the plummer (1) Lower part be additionally provided with attachment base (11), the upper end of the vertical elastomeric elements (20) and attachment base (11) are connected and fixed, the company Joint chair (11) is surrounded by multiple second hinged seats (111), the multiple adjustable negative rigidity mechanism (3) respectively with attachment base (11) the second hinged seat (111) articulated connection of surrounding.

13. negative stiffness according to claim 1 can harmonize zero stiffness isolation mounting, it is characterised in that: the plummer (1) The through-hole (12) being surrounded by for installing fixed carried object.

14. negative stiffness described in a kind of any one of claim 1~13 can harmonize the application method of zero stiffness isolation mounting, It is characterized in that, implementation steps include: to install fixed carried object on plummer (1), pass through each adjustable negative rigidity mechanism (3) horizontal resiliency element (30) is adjusted to horizontality by height adjustment mechanism (32), so that each horizontal resiliency element (30) preset decrement is kept；When carried object is when functioning equalization position is by extraneous disturbance, each horizontal resiliency is first The elastic potential energy stored in part (30) is released, and generates active force identical with external disturbance power direction, to offset vertically Elastic element (20) is deformed required portion of energy, finally plays the vibration of isolation carried object toward the work of external transmitting With.

15. the application method that negative stiffness according to claim 14 can harmonize zero stiffness isolation mounting, which is characterized in that institute Each horizontal resiliency element (30) is stated to keep shown in the function expression such as formula (1) of preset decrement；

In formula (1), λ is that each horizontal resiliency element (30) keeps preset decrement, and n is the number of horizontal resiliency element (30) And n is even number, the length of stiff connecting section of the L between horizontal resiliency element (30) and plummer (1), K₁For vertical elasticity The rigidity of element (20), K₂For the rigidity of horizontal resiliency element (30).