CN109723756B - Adjustable ultralow frequency quasi-zero stiffness vibration isolator - Google Patents
Adjustable ultralow frequency quasi-zero stiffness vibration isolator Download PDFInfo
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- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
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Abstract
The invention relates to an adjustable ultralow frequency quasi-zero stiffness vibration isolator, which belongs to the field of vibration isolators and comprises a shell, wherein a first cylinder is arranged in the shell, the first cylinder is in a cylinder shape with an upper end closed and a lower end open, the upper end of the first cylinder is horizontally arranged and is used for bearing vibration isolated equipment, a plurality of negative stiffness mechanisms are uniformly arranged on the outer side of the first cylinder, the number of the negative stiffness mechanisms is greater than two, one end of each negative stiffness mechanism is fixedly connected with the inner wall of the shell, the other end of each negative stiffness mechanism is arranged on a second connecting rod which is horizontally and fixedly arranged on the inner wall of the shell, the second connecting rod faces the central shaft of the first cylinder, the other end of each negative stiffness mechanism is connected with the first cylinder through a first connecting rod, the two ends of the first connecting rod are respectively hinged with the first cylinder and the negative stiffness mechanisms, a positive spring is arranged in the first cylinder, the upper end of the positive spring is fixedly connected with the upper end of the first cylinder, and the lower end of the positive spring is connected with the bottom of the shell through a lifting device. The invention has a wider zero stiffness range.
Description
Technical Field
The invention relates to the field of vibration control, in particular to an adjustable ultralow frequency quasi-zero stiffness vibration isolator.
Background
Vibration control has important influence on the safety of the structure, the processing precision and the human health. Low frequency or ultra low frequency vibration control has long been a problem because of the difficulty in isolating or mitigating low frequency vibrations due to the design of low or ultra low frequency isolators.
The negative stiffness mechanism provides a trigger for designing the vibration isolator with low stiffness and even zero stiffness, and promotes the research of low-frequency vibration control. In the conventional vibration isolator, a negative stiffness mechanism is constructed by adopting a diagonal positive spring, a cam-roller positive spring mechanism, a precompressed positive spring, a bionic structure, a pneumatic linear actuator, a magnet and the like. Firstly, the quasi-zero stiffness vibration isolator is utilized to inhibit unidirectional vibration, and compared with a corresponding linear system, the quasi-zero stiffness mechanism has good vibration isolation performance in a low-frequency region. In subsequent studies aimed at zero stiffness vibration isolators, researchers have proposed a torsional vibration isolator that reduces shafting torsional vibrations and a multidirectional vibration isolator that improves vibration isolation in both the vertical and horizontal directions. Quasi-zero stiffness isolators are used to improve vehicle comfort, absolute motion measurement sensors, buoyant raft systems to reduce the transmission of mechanical vibrations, and neonatal transport to protect infants from vibrations due to their advantage of damping in the low frequency region. The quasi-zero stiffness mechanism is nonlinear, which can effectively increase as the parameters change. Since stiffness is related to displacement, vibration isolation performance is related to excitation amplitude.
For a conventional quasi-zero stiffness vibration isolation system, the stiffness is zero at the static equilibrium position and a small region near the static position is near zero. Along with the increase of displacement, the rigidity of the vibration isolator is rapidly increased, the nonlinearity degree is stronger and stronger, and the vibration isolation performance of the zero-rigidity aligning mechanism is endangered, so that the application of the zero-rigidity aligning mechanism in an ultralow frequency area is limited. This patent aims to further expand the frequency band and reduce the influence of the excitation amplitude on the isolation performance.
Disclosure of Invention
Based on this, it is necessary to provide an adjustable ultralow frequency quasi-zero stiffness vibration isolator, which comprises a housing, the shell internal fixation is provided with first drum, first drum is upper end closed lower extreme open-ended cylindric, the upper end level of first drum sets up for bear by vibration isolation equipment, the outside of first drum evenly is provided with a plurality of negative stiffness mechanisms, negative stiffness mechanism is quasi-zero stiffness mechanism, negative stiffness mechanism's quantity is greater than two, negative stiffness mechanism's one end with the inner wall fixed connection of shell, its other end install on the level fix set up in on the second connecting rod on the inner wall of shell, the second connecting rod orientation the center pin of first drum sets up, and the other end of negative stiffness mechanism pass through the head rod with first drum is connected, the both ends of head rod respectively with first drum with negative stiffness mechanism articulates, be provided with positive spring in the first drum, positive spring's upper end with the upper end fixed connection of first drum, positive spring's bottom through elevating gear with the bottom of shell is connected.
The negative stiffness mechanism adopted in the application can independently reach a quasi-zero state, is a quasi-zero stiffness mechanism and can be transversely compressed or stretched to reach the quasi-zero state, and the negative stiffness mechanism adopts the quasi-zero stiffness mechanism in the prior art, so that the specific structure of the negative stiffness mechanism is not repeated in the specification of the application.
In addition, the negative stiffness mechanism adopted in the application can independently reach a quasi-zero state, and a double quasi-zero stiffness mechanism is formed, so that the vibration isolator has a wider zero stiffness range compared with the traditional quasi-zero stiffness vibration isolator.
The second connecting rods are also uniformly arranged around the center line of the first cylinder, and one end of each second connecting rod, which is far away from the shell, is arranged towards the first cylinder, so that the negative stiffness mechanism can be ensured to be compressed and stretched horizontally along the axial direction of the second connecting rods, namely towards the central axis of the first cylinder.
In addition, since the two ends of the first connecting rod are respectively hinged with the first cylinder and the negative stiffness mechanism, the first connecting rod can swing up and down by taking the two ends of the first connecting rod as the rotation centers respectively, so that the first cylinder can move up and down relative to the shell under the pressure of vibration isolation equipment, and the first cylinder can vertically move up and down in the shell because the negative stiffness mechanisms are uniformly arranged around the first cylinder.
When vibration isolation equipment is not placed on the first cylinder, the first connecting rod is in a horizontal state, and the negative stiffness mechanism is in a quasi-zero state; when vibration isolation is carried out on the equipment, the equipment to be vibration isolated is placed at the top end of the first cylinder, at the moment, the positive spring is compressed, the first cylinder moves vertically downwards, the first connecting rod is pulled downwards by the first cylinder, and the negative stiffness mechanism is pulled along the second connecting rod by the first connecting rod; then, the compression amount of the positive spring can be adjusted by adjusting the height of the lifting device, so that the first connecting rod is in the horizontal position again, the negative stiffness mechanism is returned to the quasi-zero state again, and the whole device is returned to the quasi-zero state at the moment, so that the device is in the double-quasi-zero stiffness state, the device has a wider zero stiffness range, the frequency band is effectively widened, and the isolation performance of the ultra-low frequency band is improved.
Preferably, the negative stiffness mechanism is a negative stiffness buckling structure.
The negative rigidity quasi-zero structure is a buckling structure, so that the installation space can be effectively saved.
Preferably, one end of the first connecting rod, which is far away from the first cylinder, is hinged with a second cylinder, one end of the second cylinder, which is far away from the first connecting rod, is fixedly connected with one end of the negative rigidity quasi-zero structure, which is far away from the shell, and the second cylinder is sleeved on the second connecting rod in a manner of being capable of moving back and forth along the axial direction of the second connecting rod.
One end of the negative stiffness mechanism is fixed on the inner wall of the shell, the other end of the negative stiffness mechanism is fixed on the second cylinder, and when the first cylinder moves up and down, the first connecting rod is pulled, so that the second cylinder is pulled to move horizontally along the second connecting rod, and at the moment, the negative stiffness mechanism can be stretched or compressed by the second cylinder along the axial line of the second connecting rod.
Preferably, the lifting device comprises a base arranged at the bottom of the shell and a worm wheel connected with the base through a thread structure, a worm matched with the worm wheel is further rotatably arranged in the shell, and the lower end of the positive spring abuts against the upper surface of the worm wheel.
Further, the upper surface of base is provided with the support column, the surface of support column is provided with first external screw thread, the worm wheel corresponds the support column is provided with the support chamber, the support chamber cover is located the support column, just the inner wall in support chamber corresponds the regulation external screw thread is provided with the first internal screw thread rather than complex, just the support column the worm wheel and first drum is with the center pin setting.
The worm can drive the worm wheel to rotate through rotating the worm, and the worm wheel can ascend or descend along the first external threads on the surface of the support column when rotating, so that the positive spring is compressed or stretched, and the purpose of adjusting the compression amount of the positive spring is achieved.
Further, the worm extends out of the housing.
The worm extending out of the housing may facilitate rotational manipulation thereof.
Further, a third cylinder is further arranged in the shell, the third cylinder is arranged on the inner wall of the shell through a support, the first cylinder shell can be arranged in the third cylinder in a vertically movable mode, and the third cylinder and the first cylinder are arranged on the same central shaft.
Further, the third cylinder is sleeved outside the first cylinder, and the third cylinder is connected with the first cylinder through a linear bearing.
The third cylinder surrounds the positive spring, and is fixedly arranged on the inner wall of the shell through the bracket, and the outer wall of the first cylinder is connected with the outer wall of the third cylinder through the linear bearing, so that the first cylinder can move up and down along the axial direction of the first cylinder, namely, move up and down in the vertical direction.
Further, the upper surface of worm wheel is provided with the screwed pipe, the inner wall of screwed pipe is provided with the second internal thread, the third drum inserts and locates in the screwed pipe, just the outer wall of third drum corresponds the internal thread is provided with the second external screw thread with it.
The lower end of the third cylinder is a certain distance away from the upper surface of the worm wheel so that the worm wheel can move up and down along the support column for a certain distance, wherein the second external thread on the third cylinder is consistent with the first external thread on the support column, and the first internal thread and the second internal thread are consistent in specification, so that when the worm wheel is rotated, the worm wheel can ascend or descend along the outer surfaces of the support column and the third cylinder at the same time, thereby jacking or pulling down a positive spring propped against the top end of the worm wheel, and the shrinkage of the positive spring is regulated so as to ensure that the worm wheel is kept in a quasi-zero state.
Preferably, the number of the negative stiffness mechanisms is four.
The principle and effect of the present invention are further described below with reference to the above technical schemes:
according to the invention, the negative stiffness mechanism of the traditional quasi-zero stiffness vibration isolator is changed into the negative stiffness mechanism which can independently reach the quasi-zero state, so that the dual-zero stiffness mechanism can be formed, the stiffness characteristic of the vibration isolator can be effectively regulated by regulating the stiffness ratio of the negative stiffness mechanism, and the dual-zero stiffness vibration isolator has a wider zero stiffness range compared with the traditional quasi-zero stiffness vibration isolator. In addition, the invention can also adjust the compression of the positive spring, thereby effectively adjusting the rigidity characteristic of the vibration isolator, effectively widening the frequency band and improving the isolation performance of the ultra-low frequency band.
Drawings
Fig. 1 is a schematic structural diagram of an adjustable ultra-low frequency quasi-zero stiffness vibration isolator according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure of an adjustable ultra-low frequency quasi-zero stiffness vibration isolator according to an embodiment of the present invention;
fig. 3 is a graph of stiffness of an adjustable ultra-low frequency quasi-zero stiffness vibration isolator and a conventional quasi-zero stiffness vibration isolation system according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a negative stiffness mechanism according to an embodiment of the present invention.
Description of the reference numerals
1-first cylinder, 11-first connecting rod, 21-second connecting rod, 22-second cylinder, 23-negative rigidity mechanism, 3-positive spring, 4-base, 41-support column, 51-worm wheel, 511-support cavity, 512-screwed pipe, 52-worm, 6-third cylinder, 7-vibration isolation equipment.
Detailed Description
For the convenience of understanding by those skilled in the art, the present invention will be described in further detail with reference to the following examples:
referring to fig. 1-2, an adjustable ultra-low frequency quasi-zero stiffness vibration isolator comprises a housing, a first cylinder 1 is fixedly arranged in the housing, the first cylinder 1 is cylindrical with an upper end closed and a lower end open, the upper end of the first cylinder 1 is horizontally arranged and is used for bearing vibration isolating equipment 7, a plurality of negative stiffness mechanisms 23 are uniformly arranged on the outer side of the first cylinder 1, the negative stiffness mechanisms 23 are quasi-zero stiffness mechanisms, the number of the negative stiffness mechanisms 23 is greater than two, one end of each negative stiffness mechanism 23 is fixedly connected with the inner wall of the housing, for example in threaded connection, the other end of each negative stiffness mechanism 23 is arranged on a second connecting rod 21 which is horizontally and fixedly arranged on the inner wall of the housing, the second connecting rod 21 faces towards the central shaft of the first cylinder 1, the other end of each negative stiffness mechanism 23 is connected with the first cylinder 1 through a first connecting rod 11, two ends of each first connecting rod 11 are respectively hinged with the first cylinder 1 and the negative stiffness mechanism 23, a positive spring 3 is arranged in the first cylinder 1, the other ends of each positive connecting rod 3 are fixedly connected with the bottom of the first cylinder 3 through a lifting device, and the lifting device is connected with the bottom of the positive spring 3.
The negative stiffness mechanism 23 adopted in the present application can independently reach a quasi-zero state, and is a quasi-zero stiffness mechanism, which can be transversely compressed or stretched to reach a quasi-zero state, and adopts a quasi-zero stiffness mechanism in the prior art, so that the specific structure thereof is not repeated in the present application.
In addition, the negative stiffness mechanism 23 employed in the present application can independently reach a quasi-zero state by itself, forming a dual quasi-zero stiffness mechanism, thereby enabling the isolator to have a wider zero stiffness range as compared to conventional quasi-zero stiffness isolators.
Wherein the second connecting rod 21 is also uniformly disposed around the center line of the first cylinder 1, and the end of the second connecting rod 21 away from the housing is disposed toward the first cylinder 1, so that the negative stiffness mechanism 23 can be ensured to be compressed and stretched horizontally along the axial direction of the second connecting rod 21, i.e., toward the center axis of the first cylinder 1.
In addition, since the two ends of the first connecting rod 11 are respectively hinged to the first cylinder 1 and the negative stiffness mechanism 23, the first connecting rod 11 can swing up and down with the two ends thereof as rotation centers respectively, so that the first cylinder 1 can move up and down relative to the housing under the pressure of the vibration isolation device 7, and since the plurality of negative stiffness mechanisms 23 are uniformly arranged around the first cylinder 1, the first cylinder 1 can vertically move up and down in the housing.
When the vibration isolation device 7 is not placed on the first cylinder 1, the first connecting rod 11 is in a horizontal state, and the negative stiffness mechanism 23 is in a quasi-zero state; when vibration isolation is carried out on the equipment, the equipment 7 to be vibration isolated is placed at the top end of the first cylinder 1, at the moment, the positive spring 3 is compressed, the first cylinder 1 moves vertically downwards, the first connecting rod 11 is pulled downwards by the first cylinder 1, and the negative stiffness mechanism 23 is pulled along the second connecting rod 21 by the first connecting rod 11; then, the height of the lifting device is adjusted, so that the compression amount of the positive spring 3 can be adjusted, the first connecting rod 11 is in the horizontal position again, the negative stiffness mechanism 23 is returned to the quasi-zero state again, and the whole device is returned to the quasi-zero state at the moment, so that the device is in the double-quasi-zero stiffness state, the device has a wider zero stiffness range, the frequency band is effectively widened, and the isolation performance of the ultra-low frequency band is improved.
In one embodiment, the negative stiffness mechanism 23 is a negative stiffness buckling structure.
The negative rigidity quasi-zero structure is a buckling structure, so that the installation space can be effectively saved.
In one embodiment, a second cylinder 22 is hinged to an end of the first connecting rod 11 away from the first cylinder 1, an end of the second cylinder 22 away from the first connecting rod 11 is fixedly connected with an end of the negative stiffness quasi-zero structure away from the housing, and the second cylinder 22 is sleeved on the second connecting rod 21 in a manner of being capable of reciprocally moving along an axial direction of the second connecting rod 21.
One end of the negative stiffness mechanism 23 is fixed on the inner wall of the shell, the other end of the negative stiffness mechanism is fixed on the second cylinder 22, and when the first cylinder 1 moves up and down, the first connecting rod 11 is pulled, so that the second cylinder 22 is pulled to move horizontally along the second connecting rod 21, and at the moment, the negative stiffness mechanism 23 is stretched or compressed by the second cylinder 22 along the axial line of the second connecting rod 21.
In one embodiment, the lifting device comprises a base 4 arranged at the bottom of the housing and a worm wheel 51 connected with the base 4 through a thread structure, a worm 52 matched with the worm wheel 51 is rotatably arranged in the housing, and the lower end of the positive spring 3 abuts against the upper surface of the worm wheel 51.
In one embodiment, the support column 41 is disposed on the upper surface of the base 4, a first external thread is disposed on the outer surface of the support column 41, the worm wheel 51 is disposed corresponding to the support column 41 and is provided with a support cavity 511, the support cavity 511 is sleeved on the support column 41, a first internal thread matched with the first external thread is disposed on the inner wall of the support cavity 511 corresponding to the adjusting external thread, and the support column 41, the worm wheel 51 and the first cylinder 1 are disposed concentrically with the central shaft.
The worm 52 can drive the worm wheel 51 to rotate, and the worm wheel 51 can ascend or descend along the first external thread on the surface of the support column 41 when rotating, so that the positive spring 3 is compressed or stretched, and the purpose of adjusting the compression amount of the positive spring 3 is achieved.
In one embodiment, the worm 52 extends out of the housing.
The worm 52 extending out of the housing may facilitate rotational manipulation thereof.
In one embodiment, a third cylinder 6 is further disposed in the housing, the third cylinder 6 is disposed on an inner wall of the housing through a support, the first cylinder 1 is disposed in the third cylinder 6 in a manner that the housing of the first cylinder 1 can move up and down, and the third cylinder 6 and the first cylinder 1 are disposed on the same central axis.
In one embodiment, the third cylinder 6 is sleeved outside the first cylinder 1, and the third cylinder 6 is connected with the first cylinder 1 through a linear bearing.
The third cylinder 6 is disposed around the positive spring 3 and is fixedly disposed on the inner wall of the housing by a bracket, and the outer wall of the first cylinder 1 is connected with the outer wall of the third cylinder 6 by a linear bearing, so that the first cylinder 1 can move up and down along its own axial direction, i.e., vertically up and down.
In one embodiment, the upper surface of the worm wheel 51 is provided with a threaded tube 512, the inner wall of the threaded tube 512 is provided with a second internal thread, the third cylinder 6 is inserted into the threaded tube 512, and the outer wall of the third cylinder 6 is provided with a second external thread corresponding to the internal thread.
The lower end of the third cylinder 6 is at a certain distance from the upper surface of the worm wheel 51, so that the worm wheel 51 can move up and down along the support column 41 for a certain distance, wherein the second external thread on the third cylinder 6 is consistent with the first external thread on the support column 41, and the first internal thread and the second internal thread are consistent in specification, so that when the worm wheel 51 is rotated, the worm wheel 51 can rise or fall along the outer surfaces of the support column 41 and the third cylinder 6 at the same time, thereby lifting or pulling down the positive spring 3 which is abutted against the top end of the worm wheel 51, and adjusting the contraction amount of the positive spring 3, so as to ensure that the invention is kept in a quasi-zero state.
In one embodiment, the number of the negative stiffness mechanisms 23 is four.
Fig. 3 shows the stiffness curves of the vibration isolator of the present invention and a conventional quasi-zero stiffness vibration isolation system at a static stiffness ratio of 2, wherein the dashed line represents the stiffness of the conventional quasi-zero stiffness vibration isolation system and the solid line represents the stiffness of the vibration isolator of the present invention. As shown in FIG. 3, compared with the traditional quasi-zero stiffness vibration isolation system, the stiffness of the vibration isolator in the whole displacement area is larger than zero, and the stiffness in the large displacement area is close to zero, so that the vibration isolator can effectively isolate ultra-low frequency oscillation.
Thus, the vibration isolator of the present invention has a wider zero stiffness range than conventional quasi-zero stiffness vibration isolation systems.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (2)
1. The utility model provides an adjustable ultralow frequency quasi-zero stiffness vibration isolator, its characterized in that includes the shell, the shell internal fixation is provided with first drum, first drum is upper end closed lower extreme open-ended cylindric, the upper end level of first drum sets up for bear by vibration isolation equipment, the outside of first drum evenly is provided with a plurality of negative rigidity mechanisms, negative rigidity mechanism is quasi-zero rigidity mechanism, the quantity of negative rigidity mechanism is greater than two, one end of negative rigidity mechanism with the inner wall fixed connection of shell, its other end is installed on the second connecting rod that the level is fixed to be set up on the inner wall of shell, the second connecting rod orientation the center pin of first drum sets up, and the other end of negative rigidity mechanism is through the head rod with first drum is connected, the both ends of head rod respectively with first drum and negative rigidity mechanism hinge, be provided with positive spring in the first drum, the upper end of positive spring with the upper end fixed connection of first drum, the lower extreme of positive spring passes through elevating gear the bottom connection with the shell;
the negative stiffness mechanism is a negative stiffness buckling structure;
one end of the first connecting rod, which is far away from the first cylinder, is hinged with a second cylinder, one end of the second cylinder, which is far away from the first connecting rod, is fixedly connected with one end of the quasi-zero stiffness mechanism, which is far away from the shell, and the second cylinder is sleeved on the second connecting rod in a reciprocating manner along the axial direction of the second connecting rod;
the lifting device comprises a base arranged at the bottom of the shell and a worm wheel connected with the base through a thread structure, a worm matched with the worm wheel is also rotatably arranged in the shell, and the lower end of the positive spring is propped against the upper surface of the worm wheel;
the worm extends out of the housing;
the upper surface of the base is provided with a support column, the outer surface of the support column is provided with a first external thread, the worm wheel is provided with a support cavity corresponding to the support column, the support cavity is sleeved on the support column, the inner wall of the support cavity is provided with a first internal thread matched with the first external thread corresponding to the external thread, and the support column, the worm wheel and the first cylinder are arranged with a central shaft;
a third cylinder is arranged in the shell, the third cylinder is arranged on the inner wall of the shell through a support, the first cylinder shell can be arranged in the third cylinder in a vertically movable mode, and the third cylinder and the first cylinder are arranged on the same central shaft;
the third cylinder is sleeved outside the first cylinder and is connected with the first cylinder through a linear bearing;
the upper surface of worm wheel is provided with the screwed pipe, the inner wall of screwed pipe is provided with the second internal thread, the third drum inserts and locates in the screwed pipe, just the outer wall of third drum corresponds the internal thread is provided with the second external screw thread with it.
2. The adjustable ultra-low frequency quasi-zero stiffness vibration isolator according to claim 1, wherein the number of negative stiffness mechanisms is four.
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| CN201910158913.9A CN109723756B (en) | 2019-03-04 | 2019-03-04 | Adjustable ultralow frequency quasi-zero stiffness vibration isolator |
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| CN110588695A (en) * | 2019-07-30 | 2019-12-20 | 同济大学 | Quasi-zero rigidity secondary suspension system of railway vehicle |
| CN112081870A (en) * | 2020-09-03 | 2020-12-15 | 国网湖南省电力有限公司 | Adjustable ultralow-frequency quasi-zero-rigidity vibration isolation pad for distribution transformer |
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| CN103363010A (en) * | 2013-08-01 | 2013-10-23 | 湖南大学 | Buckling plate type quasi-zero stiffness vibration isolator |
| CN103398139A (en) * | 2013-08-01 | 2013-11-20 | 湖南大学 | Dish-shaped rubber quasi-zero stiffness vibration isolator |
| CN108167362A (en) * | 2018-01-03 | 2018-06-15 | 上海大学 | It is a kind of using multi-electrode Squeeze Mode magnetic spring and the quasi-zero stiffness vibration isolators of swing rod |
| CN207864498U (en) * | 2017-12-04 | 2018-09-14 | 沈阳远大装备科技有限公司 | A kind of quasi- zero stiffness system and the center vibration-isolating platform including it |
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| CN209604476U (en) * | 2019-03-04 | 2019-11-08 | 湖南大学 | Adjustable ultralow frequency quasi-zero stiffness vibration isolators |
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2019
- 2019-03-04 CN CN201910158913.9A patent/CN109723756B/en active Active
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| CN103363010A (en) * | 2013-08-01 | 2013-10-23 | 湖南大学 | Buckling plate type quasi-zero stiffness vibration isolator |
| CN103398139A (en) * | 2013-08-01 | 2013-11-20 | 湖南大学 | Dish-shaped rubber quasi-zero stiffness vibration isolator |
| CN207864498U (en) * | 2017-12-04 | 2018-09-14 | 沈阳远大装备科技有限公司 | A kind of quasi- zero stiffness system and the center vibration-isolating platform including it |
| CN108167362A (en) * | 2018-01-03 | 2018-06-15 | 上海大学 | It is a kind of using multi-electrode Squeeze Mode magnetic spring and the quasi-zero stiffness vibration isolators of swing rod |
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