CN109723756A - Adjustable ultralow frequency quasi-zero stiffness vibration isolators - Google Patents
Adjustable ultralow frequency quasi-zero stiffness vibration isolators Download PDFInfo
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Abstract
The present invention relates to a kind of adjustable ultralow frequency quasi-zero stiffness vibration isolators, belong to vibration isolator field, it includes shell, the first cylinder is provided in shell, the first cylinder is in the cylindrical shape of upper end closed lower ending opening, the upper end of the first cylinder is horizontally disposed, to carry by device for vibration insutation, several negative rigidity mechanisms are evenly arranged on the outside of the first cylinder, the quantity of negative rigidity mechanism is greater than two, one end of negative rigidity mechanism is fixedly connected with the inner wall of shell, its other end is installed in horizontal the second connecting rod being fixedly installed on the inner wall of shell, the central axis of the second connecting rod towards the first cylinder is arranged, and the other end of negative rigidity mechanism is connect by first connecting rod with the first cylinder, the both ends of first connecting rod are hinged with the first cylinder and negative rigidity mechanism respectively, positive spring is provided in the first cylinder, the upper end of positive spring and the first cylinder Upper end be fixedly connected, the lower end of positive spring is connected by the bottom of lifting device and shell.The present invention has broader zero stiffness range.
Description
Technical field
The present invention relates to vibration control field, in particular to a kind of adjustable ultralow frequency quasi-zero stiffness vibration isolators.
Background technique
Safety of the vibration control to structure, machining accuracy and human health have important influence.For a long time, due to
It designs low or ultralow vibration isolator to be difficult to be isolated or mitigate low-frequency vibration, the vibration control of low frequency or ultra low frequency is always one
Problem.
And negative rigidity mechanism provides opportunity for the vibration isolator of design Low rigidity even zero stiffness, has pushed low-frequency vibration control
The research of system.In previous vibration isolator, using diagonal positive spring, the positive spring mechanism of cam-roller, the positive spring of precommpression is imitated
Raw structure, pneumatic linear-motion actuator, magnet etc. construct negative rigidity mechanism.Firstly, being shaken using quasi-zero stiffness vibration isolators to one direction
Dynamic to be inhibited, compared with corresponding linear system, quasi- zero stiffness mechanism has good anti-vibration performance in low frequency region.Right
In the follow-up study of quasi-zero stiffness vibration isolators, researcher proposes a kind of torsion vibration isolator and one for reducing torsional vibration of shafting
Kind while the multi-direction isolation mounting for improving vertically and horizontally vibration isolating effect.Quasi-zero stiffness vibration isolators are since it is in low frequency range
The advantages of domain vibration damping, be used to improve the comfort of vehicle, absolute movement measurement sensor, reduce the buoyant raft that mechanical oscillation are propagated
System and protect baby from vibration newborn transport.Quasi- zero stiffness mechanism be it is nonlinear, it is non-thread with the variation of parameter
Property can effectively increase.Since rigidity is related with displacement, anti-vibration performance is related with excitation amplitude.
For traditional quasi- zero stiffness vibrating isolation system, rigidity is set to zero in orthostasis, near resting position
One zonule is close to zero.With the increase of displacement, the rigidity of vibration isolator is increased rapidly, and nonlinear degree is more and more stronger, this
The anti-vibration performance of alignment zero stiffness mechanism causes harm, limits it in the application in ultralow frequency domain.The purpose of this patent be for
Frequency band is further expanded, influence of the excitation amplitude to isolation performance is reduced.
Summary of the invention
Based on this, it is necessary to provide a kind of adjustable ultralow frequency quasi-zero stiffness vibration isolators, including shell, consolidate in the shell
Surely it is provided with the first cylinder, described the first cylinder is in the cylindrical shape of upper end closed lower ending opening, the upper end water of described the first cylinder
Flat setting is evenly arranged with several negative rigidity mechanisms to carry by device for vibration insutation on the outside of described the first cylinder, described negative rigid
Spend zero stiffness mechanism subject to mechanism, the quantity of the negative rigidity mechanism is greater than two, one end of the negative rigidity mechanism with it is described
The inner wall of shell is fixedly connected, and the other end is installed on horizontal the second connecting rod being fixedly installed on the inner wall of the shell
On, the central axis of second connecting rod towards described the first cylinder is arranged, and the other end of the negative rigidity mechanism passes through the
One connecting rod is connect with described the first cylinder, the both ends of the first connecting rod respectively with described the first cylinder and the negative stiffness
Mechanism is hinged, and positive spring is provided in described the first cylinder, and the upper end of the positive spring and the upper end of described the first cylinder are fixed
The lower end of connection, the positive spring is connect by lifting device with the bottom of the shell.
Wherein, the negative rigidity mechanism used in the application itself can independently reach quasi- nought state, subject to zero stiffness machine
Structure can be transversely compressed or stretch and reach quasi- nought state, use the quasi- zero stiffness mechanism of the prior art, therefore this Shen
Please specification its specific structure is not repeated.
In addition, the negative rigidity mechanism used in the application itself can independently reach quasi- nought state, double standards zero are formd
Rigidity mechanism, so that present invention vibration isolator compared with traditional quasi-zero stiffness vibration isolators has broader zero stiffness model
It encloses.
Wherein, the second connecting rod is also uniformly arranged around the center line of described the first cylinder, and the second connecting rod is far from institute
The one end for stating shell is arranged towards described the first cylinder, therefore can guarantee that negative rigidity mechanism is able to maintain horizontally along the second connection
The axial direction of bar is compressed and is stretched towards the direction of the central axis of the first cylinder.
In addition, the both ends due to first connecting rod are anti-hinged with the first cylinder and negative rigidity mechanism respectively, first connects
Extension bar can be swung up and down using its both ends as center of rotation respectively, so that the first cylinder is under the pressure by device for vibration insutation,
It can be moved up and down relative to shell, and since multiple negative rigidity mechanisms are equably arranged around described the first cylinder, the
One cylinder vertical can move up and down inside the shell.
When not being placed in the first cylinder by device for vibration insutation, first connecting rod is in horizontality, and negative rigidity mechanism is in
Quasi- nought state；When carrying out vibration isolation to equipment, the top of the first cylinder being placed on by device for vibration insutation, positive spring is compressed at this time,
The first cylinder moves down vertically, and first connecting rod is pulled down by the first cylinder, and negative rigidity mechanism is connected by first connecting rod along second
Extension bar stretches；Then, by adjusting the height of lifting device, the decrement of adjustable positive spring, so that first connecting rod weight
It is newly in a horizontal position, negative rigidity mechanism comes back to quasi- nought state, and the present invention is whole at this time also returns to quasi- nought state, and then makes
Of the invention frequency band must be effectively widened so that this hair has broader zero stiffness range in double quasi- zero stiffness states,
Improve the isolation performance of ultralow frequency range.
Preferably, the negative rigidity mechanism is negative stiffness buckling structure.
The quasi- zero structure of negative stiffness is buckling structure, can effectively save installation space.
Preferably, the first connecting rod is hinged with the second cylinder, second circle far from one end of described the first cylinder
Cylinder is fixedly connected with the quasi- zero structure of the negative stiffness far from one end of the shell far from one end of the first connecting rod, and institute
It states the second cylinder and is sheathed on second connecting rod along the axial direction of second connecting rod with being reciprocally moveable.
One end of negative rigidity mechanism is fixed on the inner wall of shell, and the other end is fixed in the second cylinder, the first cylinder
When up and down motion, first connecting rod will pull, so that the second cylinder be pulled to move horizontally along the second connecting rod, negative stiffness at this time
Mechanism can be stretched by the second cylinder along the axial defence line of the second connecting rod or compression.
Preferably, the lifting device include be set to the bottom of the shell pedestal and by helicitic texture with it is described
The worm gear of pedestal connection, also can be rotatably set the worm screw with the worm gear in the shell, under the positive spring
It holds and offsets with the upper surface of the worm gear.
Further, the upper surface of the pedestal is provided with support column, and the outer surface of the support column is provided with outside first
Screw thread, the worm gear correspond to the support column and are provided with support chamber, and the support chamber is sheathed on the support column, and the support
The inner wall of chamber corresponds to the adjusting external screw thread and is provided with the first matched internal screw thread, and the support column, the worm gear with
And described the first cylinder is arranged with central axis.
The rotation of worm gear can be driven by rotary worm, worm gear can be along first external screw thread on support column surface when rotating
Rise perhaps decline to compress or stretch positive spring, to achieve the purpose that the decrement for adjusting positive spring.
Further, the worm screw extends the shell.
The worm screw for extending shell can be in order to carrying out rotation operation to it.
Further, the 3rd cylinder is additionally provided in the shell, described the 3rd cylinder is set to described outer by bracket
The inner wall of shell, the first cylinder shell is moving up and down to be set in described the 3rd cylinder, and described the 3rd cylinder with it is described
The first cylinder is arranged with central axis.
Further, described the 3rd cylinder is sheathed on outside described the first cylinder, and described the 3rd cylinder passes through linear bearing
It is connect with described the first cylinder.
The 3rd cylinder is arranged around positive spring, and is fixed by the bracket the inner wall that shell is arranged in, the outer wall of the first cylinder
It is connected by linear bearing and the outer wall of the 3rd cylinder, therefore the first cylinder can move down on the axial direction along its own
It is dynamic, i.e. lower movement in the vertical direction.
Further, the upper surface of the worm gear is provided with screwed pipe, and the inner wall of the screwed pipe is provided with spiral shell in second
Line, described the 3rd cylinder are inserted in the screwed pipe, and the outer wall of described the 3rd cylinder correspond to the internal screw thread be provided with
Cooperation the second external screw thread.
Upper surface of the lower end of the 3rd cylinder apart from worm gear has a certain distance, to allow worm gear along support column
Move up and down a certain distance, wherein the first externally threaded specification one on the second external screw thread and support column in the 3rd cylinder
Cause, the specification of the first internal screw thread and the second internal screw thread is consistent, therefore when rotate worm gear, worm gear can and meanwhile along support column and the
The outer surface of three cylinders rises perhaps decline so that the positive spring that the top of jacking or drop-down and worm gear offsets, adjusts positive bullet
The shrinkage of spring, to guarantee that the present invention is maintained at the state of standard zero.
Preferably, the quantity of the negative rigidity mechanism is four.
The principle of the present invention, effect are further illustrated below with reference to above-mentioned technical proposal:
The present invention by by the negative rigidity mechanism of traditional quasi-zero stiffness vibration isolators be changed to itself i.e. it is independent reach standard zero
The negative rigidity mechanism of state, so that the present invention can form Shuan Zhun zero stiffness mechanism, by adjusting the rigid of negative rigidity mechanism
Ratio is spent, the stiffness characteristics of vibration isolator can be effectively adjusted, so that the present invention is compared with traditional quasi-zero stiffness vibration isolators
Relatively there is broader zero stiffness range.In addition, the present invention can also adjust the decrement of positive spring, to effectively adjust vibration isolation
The stiffness characteristics of device, have effectively widened frequency band, improve the isolation performance of ultralow frequency range.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of adjustable ultralow frequency quasi-zero stiffness vibration isolators described in the embodiment of the present invention；
Fig. 2 is the schematic diagram of the section structure of adjustable ultralow frequency quasi-zero stiffness vibration isolators described in the embodiment of the present invention；
Fig. 3 is the rigid of adjustable ultralow frequency quasi-zero stiffness vibration isolators described in the embodiment of the present invention and the quasi- zero stiffness vibrating isolation system of tradition
It writes music line chart；
Fig. 4 is the schematic diagram of the section structure of negative rigidity mechanism described in the embodiment of the present invention.
Description of symbols
1- the first cylinder, 11- first connecting rod, the second connecting rod of 21-, 22- the second cylinder, 23- negative rigidity mechanism, the positive bullet of 3-
Spring, 4- pedestal, 41- support column, 51- worm gear, 511- support chamber, and 512- screwed pipe, 52- worm screw, 6- the 3rd cylinder, 7- is by vibration isolation
Equipment.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, below in conjunction with embodiment, the invention will be described in further detail:
Such as Fig. 1-2, a kind of adjustable ultralow frequency quasi-zero stiffness vibration isolators, including shell are fixedly installed first in the shell
Cylinder 1, described the first cylinder 1 are in the cylindrical shape of upper end closed lower ending opening, and the upper end of described the first cylinder 1 is horizontally disposed, uses
To carry by device for vibration insutation 7, the outside of described the first cylinder 1 is evenly arranged with several negative rigidity mechanisms 23, the negative stiffness machine
Zero stiffness mechanism subject to structure 23, the quantity of the negative rigidity mechanism 23 is greater than two, one end of the negative rigidity mechanism 23 and institute
The inner wall for stating shell is fixedly connected, such as is threadedly coupled, and the other end is installed on the horizontal inner wall for being fixedly installed on the shell
On the second connecting rod 21 on, the central axis of second connecting rod 21 towards described the first cylinder 1 is arranged, and the negative stiffness
The other end of mechanism 23 is connect by first connecting rod 11 with described the first cylinder 1, the both ends difference of the first connecting rod 11
It is hinged with described the first cylinder 1 and the negative rigidity mechanism 23, positive spring 3, the positive spring are provided in described the first cylinder 1
3 upper end is fixedly connected with the upper end of described the first cylinder 1, and the lower end of the positive spring 3 passes through lifting device and the shell
Bottom connection.
Wherein, the negative rigidity mechanism 23 used in the application itself can independently reach quasi- nought state, subject to zero stiffness
Mechanism can be transversely compressed or stretch and reach quasi- nought state, use the quasi- zero stiffness mechanism of the prior art, therefore this
Application specification does not repeat its specific structure.
In addition, the negative rigidity mechanism 23 used in the application itself can independently reach quasi- nought state, double standards are formd
Zero stiffness mechanism, so that present invention vibration isolator compared with traditional quasi-zero stiffness vibration isolators has broader zero stiffness
Range.
Wherein, the second connecting rod 21 is also uniformly arranged around the center line of described the first cylinder 1, and the second connecting rod 21 is remote
One end from the shell is arranged towards described the first cylinder 1, thus can guarantee negative rigidity mechanism 23 be able to maintain horizontally along
The axial direction of second connecting rod 21 is compressed and is stretched towards the direction of the central axis of the first cylinder 1.
In addition, the both ends due to first connecting rod 11 are anti-hinged with the first cylinder 1 and negative rigidity mechanism 23 respectively, the
One connecting rod 11 can be swung up and down using its both ends as center of rotation respectively, so that the first cylinder 1 is by device for vibration insutation 7
It under pressure, can be moved up and down relative to shell, and since multiple negative rigidity mechanisms 23 are equably set around described the first cylinder 1
It sets, therefore the first cylinder 1 vertical can move up and down inside the shell.
When not being placed with by device for vibration insutation 7 in the first cylinder 1, first connecting rod 11 is in horizontality, negative rigidity mechanism
23 are in quasi- nought state；When carrying out vibration isolation to equipment, the top of the first cylinder 1 will be placed on by device for vibration insutation 7, at this time positive spring
3 are compressed, and the first cylinder 1 moves down vertically, and first connecting rod 11 is pulled down by the first cylinder 1, and negative rigidity mechanism 23 is connected by first
Extension bar 11 is stretched along the second connecting rod 21；Then, by adjusting the height of lifting device, the compression of adjustable positive spring 3
Amount, so that first connecting rod 11 is in a horizontal position again, negative rigidity mechanism 23 comes back to quasi- nought state, of the invention at this time whole
Body also returns to quasi- nought state, so that the present invention is in double quasi- zero stiffness states, so that this hair is rigid with broader zero
Range is spent, frequency band has effectively been widened, has improved the isolation performance of ultralow frequency range.
One of embodiment, the negative rigidity mechanism 23 are negative stiffness buckling structure.
The quasi- zero structure of negative stiffness is buckling structure, can effectively save installation space.
One of embodiment, the first connecting rod 11 are hinged with the second cylinder far from one end of described the first cylinder 1
22, the one end of described the second cylinder 22 far from the first connecting rod 11 and the quasi- zero structure of the negative stiffness are far from the shell
One end is fixedly connected, and described the second cylinder 22 is sheathed on being reciprocally moveable along the axial direction of second connecting rod 21
Second connecting rod 21.
One end of negative rigidity mechanism 23 is fixed on the inner wall of shell, and the other end is fixed in the second cylinder 22, and first
When cylinder 1 moves up and down, first connecting rod 11 will pull, so that the second cylinder 22 be pulled to move along the second connecting rod 21 is horizontal
Dynamic, negative rigidity mechanism 23 can be stretched or be compressed along the axial defence line of the second connecting rod 21 by the second cylinder 22 at this time.
One of embodiment, the lifting device include being set to the pedestal 4 of the bottom of the shell and passing through screw thread
The worm gear 51 that structure is connect with the pedestal 4 also can be rotatably set the worm screw with the worm gear 51 cooperation in the shell
52, the lower end of the positive spring 3 and the upper surface of the worm gear 51 offset.
One of embodiment, the upper surface of the pedestal 4 are provided with support column 41, and the outer surface of the support column 41 is set
It is equipped with the first external screw thread, the corresponding support column 41 of the worm gear 51 is provided with support chamber 511, and the support chamber 511 is sheathed on
The support column 41, and the inner wall of the support chamber 511 corresponds to the adjusting external screw thread and is provided with spiral shell in matched first
Line, and the support column 41, the worm gear 51 and described the first cylinder 1 are arranged with central axis.
It can drive the rotation of worm gear 51 by rotary worm 52, it can be along the of 41 surface of support column when worm gear 51 rotates
One external screw thread rises perhaps decline to compress or stretch positive spring 3, to reach the mesh for adjusting the decrement of positive spring 3
's.
One of embodiment, the worm screw 52 extend the shell.
The worm screw 52 for extending shell can be in order to carrying out rotation operation to it.
One of embodiment, the 3rd cylinder 6 is additionally provided in the shell, and described the 3rd cylinder 6 passes through bracket and is arranged
In the inner wall of the shell, 1 shell of the first cylinder is moving up and down to be set in described the 3rd cylinder 6, and the third
Cylinder 6 and described the first cylinder 1 are arranged with central axis.
One of embodiment, described the 3rd cylinder 6 is sheathed on outside described the first cylinder 1, and described the 3rd cylinder 6 passes through
Linear bearing is connect with described the first cylinder 1.
The 3rd cylinder 6 is arranged around positive spring 3, and is fixed by the bracket the inner wall that shell is arranged in, outside the first cylinder 1
Wall is connect by linear bearing with the outer wall of the 3rd cylinder 6, therefore the first cylinder 1 can be above and below the axial direction along its own
It is mobile, i.e. lower movement in the vertical direction.
One of embodiment, the upper surface of the worm gear 51 are provided with screwed pipe 512, the inner wall of the screwed pipe 512
It is provided with the second internal screw thread, described the 3rd cylinder 6 is inserted in the screwed pipe 512, and the outer wall of described the 3rd cylinder 6 is corresponding
The internal screw thread is provided with the second matched external screw thread.
Upper surface of the lower end of the 3rd cylinder 6 apart from worm gear 51 have a certain distance, to allow worm gear 51 along
Support column 41 moves up and down a certain distance, wherein the first outer spiral shell on the second external screw thread and support column 41 in the 3rd cylinder 6
The specification of line is consistent, and the specification of the first internal screw thread and the second internal screw thread is consistent, therefore when rotating worm gear 51, and worm gear 51 can simultaneously
Rise perhaps decline along the outer surface of support column 41 and the 3rd cylinder 6 thus the top phase of jacking or drop-down and worm gear 51
The positive spring 3 supported adjusts the shrinkage of positive spring 3, to guarantee that the present invention is maintained at the state of standard zero.
One of embodiment, the quantity of the negative rigidity mechanism 23 are four.
It is bent that Fig. 3 gives the rigidity of vibration isolator and the quasi- zero stiffness vibrating isolation system of tradition of the invention when Static stiffness is than being 2
Line, dotted line therein indicate the rigidity of the quasi- zero stiffness vibrating isolation system of tradition, and solid line indicates the rigidity of vibration isolator of the invention.Such as figure
Shown in 3, vibration isolator of the invention compared with traditional quasi- zero stiffness vibrating isolation system, the entire displacement field of vibration isolator of the invention
Rigidity is greater than zero, and the rigidity in big displacement area is close to zero, therefore, can be effectively isolated ultra low frequency oscillation.
Therefore, vibration isolator more of the invention compared with traditional quasi- zero stiffness vibrating isolation system has broader zero stiffness model
It encloses.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of adjustable ultralow frequency quasi-zero stiffness vibration isolators, which is characterized in that including shell, be fixedly installed in the shell
The first cylinder, described the first cylinder are in the cylindrical shape of upper end closed lower ending opening, and the upper end of described the first cylinder is horizontally disposed, uses
With carrying by device for vibration insutation, several negative rigidity mechanisms are evenly arranged on the outside of described the first cylinder, the negative rigidity mechanism is
The quantity of quasi- zero stiffness mechanism, the negative rigidity mechanism is greater than two, and one end of the negative rigidity mechanism is interior with the shell
Wall is fixedly connected, and the other end is installed in horizontal the second connecting rod being fixedly installed on the inner wall of the shell, and described the
Two connecting rods towards described the first cylinder central axis be arranged, and the other end of the negative rigidity mechanism by first connecting rod with
The first cylinder connection, the both ends of the first connecting rod are hinged with described the first cylinder and the negative rigidity mechanism respectively,
Positive spring is provided in described the first cylinder, the upper end of the positive spring is fixedly connected with the upper end of described the first cylinder, described
The lower end of positive spring is connect by lifting device with the bottom of the shell.
2. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 1, which is characterized in that the negative rigidity mechanism
For negative stiffness buckling structure.
3. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 1, which is characterized in that the first connecting rod
One end far from described the first cylinder is hinged with the second cylinder, described the second cylinder one end and institute far from the first connecting rod
It states the quasi- zero structure of negative stiffness to be fixedly connected far from one end of the shell, and described the second cylinder is along second connecting rod
Axial direction is sheathed on second connecting rod with being reciprocally moveable.
4. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 1, which is characterized in that the lifting device packet
The worm gear for including the pedestal for being set to the bottom of the shell and being connect by helicitic texture with the pedestal may be used also in the shell
It is rotationally provided with the worm screw with the worm gear, the lower end of the positive spring and the upper surface of the worm gear offset.
5. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 4, which is characterized in that the worm screw is extended
The shell.
6. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 4, which is characterized in that the upper table of the pedestal
Face is provided with support column, and the outer surface of the support column is provided with the first external screw thread, and the worm gear corresponds to the support column setting
There is support chamber, the support chamber is sheathed on the support column, and the inner wall of the support chamber corresponds to the adjusting external screw thread setting
There is the first matched internal screw thread, and the support column, the worm gear and described the first cylinder are arranged with central axis.
7. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 4, which is characterized in that also set in the shell
Be equipped with the 3rd cylinder, described the 3rd cylinder is set to the inner wall of the shell by bracket, the first cylinder shell can on move down
Dynamic is set in described the 3rd cylinder, and described the 3rd cylinder and described the first cylinder are arranged with central axis.
8. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 7, which is characterized in that the 3rd cylinder set
Outside described the first cylinder, and described the 3rd cylinder is connect by linear bearing with described the first cylinder.
9. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 7, which is characterized in that the upper table of the worm gear
Face is provided with screwed pipe, and the inner wall of the screwed pipe is provided with the second internal screw thread, and described the 3rd cylinder is inserted in the screwed pipe
It is interior, and the outer wall of described the 3rd cylinder corresponds to the internal screw thread and is provided with the second matched external screw thread.
10. adjustable ultralow frequency quasi-zero stiffness vibration isolators according to claim 1, which is characterized in that the negative stiffness machine
The quantity of structure is four.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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| 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 |
| CN108757799A (en) * | 2018-08-31 | 2018-11-06 | 天津航天机电设备研究所 | A kind of quasi- zero stiffness isolation mounting of flexibility |
| CN209604476U (en) * | 2019-03-04 | 2019-11-08 | 湖南大学 | Adjustable ultralow frequency quasi-zero stiffness vibration isolators |
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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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