CN108167363A - A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom - Google Patents
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom Download PDFInfo
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- CN108167363A CN108167363A CN201711419389.3A CN201711419389A CN108167363A CN 108167363 A CN108167363 A CN 108167363A CN 201711419389 A CN201711419389 A CN 201711419389A CN 108167363 A CN108167363 A CN 108167363A
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- low frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/063—Negative stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to a kind of positive and negative Stiffness low frequency vibration isolation devices of two-freedom, belong to vibration isolation technique field, and device includes upper strata isolation mounting and lower floor's isolation mounting；Non-touching magnet forms the negative rigidity mechanism of lower floor's isolation mounting, sliding block and spring etc. form the positive rigidity mechanism of lower floor's isolation mounting, and the horizontal impact being subject to by vibration isolation object can be effectively isolated in the low frequency vibration isolation device that the positive negative rigidity mechanism of lower floor composes in parallel；Compression spring, adjusting screw, compression bar of upper strata isolation mounting etc. form negative rigidity mechanism, the vibratory impulse for the vertical direction being subject to by vibration isolation object can be effectively isolated in the positive rigidity mechanism of the compositions such as support spring, the connecting plate of upper strata isolation mounting, the low frequency vibration isolation device that the positive negative rigidity mechanism in upper strata composes in parallel.Upper and lower two layers of isolation mounting is connected by intermediate connecting platform, forms two-freedom isolation mounting, and apparatus structure is compact, has higher engineering application value in automobile, precision instrument, nobody fields such as automatic stored.
Description
Technical field
The present invention relates to a kind of positive and negative Stiffness low frequency vibration isolation devices of two-freedom, belong to vibration isolation technique field, can be wide
The general low-frequency vibration isolation applied to fields such as vehicle, unmanned storage trolley, precision instruments.
Background technology
The phenomenon that vibration is a kind of common in mechanical engineering, and it is more in the case of vibration be harmful, for example, mechanical oscillation
The not only precision of damage mechanical equipment, service life, and noise can be generated, influence the stationarity of mechanical equipment operating and to ambient enviroment
Have an adverse effect.With made in China 2025 and the propulsion of industry 4.0, the power and rotating speed for operating machinery constantly improve,
Mechanical engineering field equipment, which has become vibration isolation technique in one letter, to be solved the problems, such as.In vibration isolation field, there are one very intentionally
The number of justice：Its meaning is exactly, and is m for a quality, and rigidity is the linear vibrating isolation system of single-degree-of-freedom of k, system
Intrinsic frequency isBut only driving frequency is more than system frequencyTimes when, single-degree-of-freedom vibrating isolation system
With vibration isolating effect.For passive vibration isolation system, when it is designed to vibration isolation object, intrinsic frequency just it has been determined that
And frequency domain band is isolated also it has been determined that vibrating frequency domain band, that is, reduce passive vibration isolation system frequency to widen isolation in it,
And the intrinsic frequency under the conditions of big machinery high-mechanic is difficult often to reduce, and occurs as soon as the face of system frequency height initiation in this way
Face anti-low frequency, the problem of low-frequency vibration effect is poor is isolated；Even occur reducing system stiffness for isolation low-frequency vibration when serious, and
Lead to the excessive or unstability of the quiet deformation of system occur since rigidity is too small.Therefore, traditional steel spring isolation mounting is being isolated
It will appear the problem of quiet deformation is excessive during low-frequency vibration, great of both bearing capacity and low frequency vibration isolation choose cannot be taken into account by facing
War.Recent study shows that quasi- zero stiffness vibrating isolation system has the good characteristics such as high Static stiffness and low dynamic stiffness, can expire simultaneously
The requirement of sufficient high bearing capacity and low dynamic stiffness.
Existing quasi- zero stiffness vibration-isolating platform is all based on greatly the isolation mounting of positive and negative Rigidity Matching, has to big displacement vibration
Preferable vibration isolating effect.It is as follows:
Chinese patent 201310142491.9, which discloses, a kind of bright to be disclosed a kind of compact-sized positive and negative Stiffness and subtracts
Shake device, belongs to precision vibration damping field.The positive and negative rigidity parallel connection shock absorber includes positive rigidity air spring and negative stiffness magnetic spring, just
Rigidity air spring and the parallel arrangement of negative stiffness magnetic spring, negative stiffness magnetic spring are mounted in air spring chamber.Positive rigidity is empty
Gas spring is circular cavity or rectangular cavities, for carrying.Negative stiffness magnetic spring is by inner magnet, external magnet, internal magnet seat
And external magnet seat composition, for reducing the dynamic stiffness of damper.Inner magnet is arranged with external magnet in repulsion.This is positive and negative just
Degree damper in parallel has the characteristics that the low dynamic stiffness of high Static stiffness so that damper has the small static deformation of big bearing capacity
Superlow frequency vibrating can be effectively isolated simultaneously.Chinese patent 201610182527.X discloses a kind of quasi- zero stiffness compression bar.The standard
Zero stiffness compression bar mainly by one universal rolling wheel of hemisphere annular protrusion, the one reed mechanism with negative stiffness and provides the perpendicular of positive rigidity
Straight spring composition, wherein universal rolling wheel is mounted on reed, and reed is supported by the annular sleeve being fixed in outer sleeve, ensures half
Ball annular protrusion to neutrality.The parallel combination of positive and negative stiffness elements makes compression bar have the low dynamic stiffness feature of high Static stiffness so that
Its rigidity at equipoise is zero, and small stiffness characteristics are presented near equilbrium position.Quasi- zero stiffness compression bar can
All kinds of vibration-isolating platforms are installed on, make it that there is high quiet low dynamic stiffness characteristic in each degree of freedom, so as to fulfill low frequency vibration isolation.
106321707 A of Chinese patent document CN disclose a kind of two-freedom ultralow frequency vibration isolator, but it uses handstand
Pendulum, air spring etc. construct vibration isolator, and self structure is unstable, is also not susceptible to implement；Chinese patent document CN 104033535
A discloses a kind of three-dimensional vibration isolating device suitable for low-frequency vibration, although be divided into up and down two layers, upper part with lower part only
It is supported by intermediate guide post, under vibration signal excitation, part can be caused unstable.
The defects of above-mentioned technical proposal, is：Simple one direction vibration isolation can only be carried out, mass change can not be met
It is isolated vibrating objects isolation requirement.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom,
It is compact-sized, have big bearing capacity, disclosure satisfy that mass change is isolated vibrating objects isolation requirement, while can be isolated
The low-frequency vibration of both direction.
Technical scheme is as follows：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, including upper strata isolation mounting and lower floor's isolation mounting；
Lower floor's isolation mounting includes mobile base, and mobile base upper surface is equipped with stent, and stent is equipped with guide rail, on guide rail
Spring and sliding block are arranged with, spring one end is connect with stent, and spring other end connection sliding block, mobile base upper surface is additionally provided with magnetic
Iron；
Upper strata isolation mounting includes intermediate connecting platform, sliding block, carrier connecting platform, and branch is equipped with above intermediate connecting platform
Spring guide pillar is supportted, support spring is arranged on support spring guide post, support spring one end is contacted with intermediate connecting platform, supports bullet
The spring other end is contacted with support slipper；Carrier connecting platform is connect by connecting plate with support slipper；
Compression spring pedestal is additionally provided with above intermediate connecting platform, compression spring pedestal is equipped with compression spring chamber, and compression spring intracavitary is equipped with compression spring,
Compression spring one end is connected with adjusting screw, and the compression spring other end is connect with compression bar, and compression bar is connect with carrier connecting platform；
Sliding block side is connect with intermediate connecting platform；Magnet is equipped with below intermediate connecting platform, mobile base upper surface
Magnet is arranged side by side with the magnet below intermediate connecting platform.
Lower floor's isolation mounting is by non-contact magnet (magnet of mobile base upper surface and the magnetic below intermediate connecting platform
Iron) negative rigidity mechanism is provided, the spring on guide rail provides positive rigidity mechanism；Upper strata isolation mounting is provided negative firm by compression spring and compression bar
Mechanism is spent, the support spring and its guider between the carrier connecting platform on upper strata and intermediate connecting platform collectively constitute just just
Spend mechanism.
According to currently preferred, mobile base is rectangular flat, and the quantity of stent is four, and branch is set up in mobile base
On four angles；The quantity of guide rail is two, and guide rail is connected between two opposite stents.The quantity of corresponding sliding block, spring
Also it is 4, is distributed in the edge of mobile base.
It is further preferred that guide rail is cylinder, sliding block side is bolted with intermediate connecting platform.
It is further preferred that the axis of two guide rails is mutually parallel, the axis of two guide rails is located in the same horizontal plane.
It is further preferred that plane opposite between magnet and magnet is parallel with the axis of guide rail.
According to currently preferred, mobile base upper surface is set there are two magnet, set below intermediate connecting platform there are one
Magnet, the magnet in horizontal direction below intermediate connecting platform are located between the magnet of mobile base upper surface two, the phase of magnet
Opposite is set for magnetic repulsion.
According to currently preferred, the compression spring other end is connect by ball pair with compression bar, and compression bar is connect by ball pair with carrier
Platform connects.
According to currently preferred, compression spring pedestal is connect by bolt with intermediate connecting platform.
It is further preferred that intermediate connecting platform is rectangular flat, compression spring pedestal is set on four angles of intermediate connecting platform
On.
It is further preferred that being set on each angle of intermediate connecting platform, there are two compression spring pedestals.
Limiting cover board is equipped with according to currently preferred, above support spring guide post.When the support of connection support spring is slided
When block moves up, limiting cover board plays position-limiting action.
It is further preferred that the quantity of support spring guide post is three, the distance between two neighboring support spring guide post
It is equal.Support spring guide post is uniformly distributed on intermediate connecting platform.
It is further preferred that it is equipped with rubber pad below limiting cover board.When being moved on support slipper at limited cover plate, rubber
Pad can play cushioning effect, prevent damaged in collision parts.
According to currently preferred, universal wheel is equipped with below mobile base.
The beneficial effects of the present invention are：
Technical scheme of the present invention bearing capacity is strong, and the object that is isolated of mass change can be isolated, while can realize two
Direction makes the vibration signal of equipment significantly subtract i.e. along the horizontal translation direction of motion and the vibration isolation in vertical translational motion direction
It is weak.
Technical scheme of the present invention uses the spare part in common use of the easily fabricated replacements such as spring, magnet, and structure is divided into up and down
It is two layers, clear, it is easy to implement, there is certain engineer application valency in automobile, precision instrument, nobody fields such as automatic stored
Value.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the positive and negative Stiffness low frequency vibration isolation device of two-freedom of the present invention；
Fig. 2 is the front view of the positive and negative Stiffness low frequency vibration isolation device of two-freedom of the present invention；
Fig. 3 is the side view of the positive and negative Stiffness low frequency vibration isolation device of two-freedom of the present invention；
Fig. 4 is the positive and negative Stiffness low frequency vibration isolation device superstructure schematic diagram of two-freedom of the present invention；
Fig. 5 is the positive and negative Stiffness low frequency vibration isolation device understructure schematic diagram of two-freedom of the present invention.
Wherein：1st, carrier connecting platform, 2, intermediate connecting platform, 3, mobile base, 4, universal wheel, 5, magnet a, 6, magnet
B, 7, magnet c, 8, limiting cover board, 9, rubber pad, 10, connecting plate, 11, support slipper, 12, support spring guide post, 13, support bullet
Spring, 14, compression spring pedestal, 15, adjusting screw, 16, compression spring, 17, compression bar, 18, guide rail, 19, sliding block, 20, spring, 21, stent,
22nd, lower floor's isolation mounting, 23, upper strata isolation mounting.
Specific embodiment
The present invention will be further described by way of example and in conjunction with the accompanying drawings, but not limited to this.
As shown in Figs. 1-5.
Embodiment 1：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, including upper strata isolation mounting 23 and lower floor's isolation mounting
22；
Lower floor's isolation mounting 22 includes mobile base 3, and 3 upper surface of mobile base is equipped with stent 21, and stent 21 is equipped with and leads
Rail 18 is arranged with spring 20 and sliding block 19 on guide rail 18, and 20 one end of spring is connect with stent 21,20 other end connection sliding block of spring
19,3 upper surface of mobile base is additionally provided with magnet.
Upper strata isolation mounting 23 includes intermediate connecting platform 2, support slipper 11, carrier connecting platform 1, intermediate connecting platform
2 tops are equipped with support spring guide post 12 by bolt, and support spring 13, support spring 13 1 are arranged on support spring guide post 12
End is contacted with intermediate connecting platform 2, and 13 other end of support spring is contacted with support slipper 11；Carrier connecting platform 1 passes through connection
Plate 10 is connect with support slipper 11, and support slipper 11 is connected by 4 bolt and nuts and 10 lower end of connecting plate, 10 upper end of connecting plate
It is connected by 7 bolt and nuts and carrier connecting platform 1.
Intermediate 2 top of connecting platform is additionally provided with compression spring pedestal 14, and compression spring pedestal 14 is equipped with compression spring chamber, and compression spring intracavitary is equipped with
Compression spring 16,16 one end of compression spring are connected with adjusting screw 15, and adjusting screw can adjust compression spring precompression；16 other end of compression spring and pressure
Bar 17 connects, and compression bar 17 is connect with carrier connecting platform 1；
19 side of sliding block is connect by 4 bolts with intermediate connecting platform 2；Intermediate 2 lower section of connecting platform is equipped with magnet, moves
The magnet of dynamic 3 upper surface of pedestal is arranged side by side with the magnet below intermediate connecting platform.
Lower floor's isolation mounting is by non-contact magnet (magnet of mobile base upper surface and the magnetic below intermediate connecting platform
Iron) negative rigidity mechanism is provided, the spring on guide rail provides positive rigidity mechanism；Upper strata isolation mounting is provided negative firm by compression spring and compression bar
Mechanism is spent, the support spring and its guider between the carrier connecting platform on upper strata and intermediate connecting platform collectively constitute just just
Spend mechanism.
Embodiment 2：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 1, the difference is that
Mobile base 3 is rectangular flat, and the quantity of stent 21 is four, and stent 21 is set on 3 four angles of mobile base, and stent 21 passes through
Bolt is symmetrically arranged in 3 upper surface of mobile base with 90 ° of intervals；Corresponding sliding block 19, spring 20 quantity be also 4, distribution
In the edge of mobile base 3.The quantity of guide rail 18 is two, and guide rail 18 is connected between two opposite stents 21.Guide rail 18
For cylinder, 19 side of sliding block is bolted with intermediate connecting platform 2.The axis of two guide rails 18 is mutually parallel, two guide rails
18 axis is located in the same horizontal plane.
Embodiment 3：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 2, the difference is that
Opposite plane is parallel with the axis of guide rail between magnet and magnet.
Embodiment 4：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 3, the difference is that
Mobile base upper surface is set there are two magnet：Magnet a 5, magnet c 7, magnet a 5 and magnet c 7 symmetrically divide about moving direction
Cloth.It is set below intermediate connecting platform there are one magnet b 6, the magnet b 6 in horizontal direction below intermediate connecting platform, which is located at, to be moved
Between two magnet of dynamic base upper surface, magnet b 6 is fixed in intermediate 2 center of connecting platform, and the opposite face of magnet is magnetic
Repulsion is set.Non-contact magnet a 5, magnet c 7 and magnet b 6 provide negative rigidity mechanism.
Embodiment 5：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 4, the difference is that
16 other end of compression spring is connect by ball pair with compression bar 17, and compression bar 17 is connect by ball pair with carrier connecting platform 1.
Embodiment 6：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 1, the difference is that
Compression spring pedestal 14 is fixed in intermediate 2 upper surface of connecting platform by 4 bolts.
Embodiment 7：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 5, the difference is that
Intermediate connecting platform 2 is rectangular flat, and compression spring pedestal 14 is set on four angles of intermediate connecting platform 2.Intermediate connecting platform 2
Compression spring pedestal 14 there are two being set on each angle.8 compression spring pedestals with 2 are one group, 90 ° be uniformly at intervals in intermediate connecting platform
2 upper surfaces.It is uniformly at intervals in 1 lower surface of carrier connecting platform that the ball pair of connection, which is also one group, 90 ° with 2,.
When mobile base 3 along 18 axis direction of guide rail by being encouraged, magnet b 6 is produced with magnet a 5 and magnet c 7
Relative motion is given birth to, magnetic repulsion can form Negative stiffness spring mechanism at this time, and sliding block 19 is along 18 motion compresses direction of motion bullet of guide rail
Spring 20 forms positive rigidity mechanism, and positive negative rigidity mechanism is in parallel by intermediate connecting platform 2, forms lower floor's isolation mounting 22, isolation
Vibrational excitation from horizontal direction so that 1 carrier levels direction vibration signal of carrier connecting platform weakens.
When mobile base 3 is by vibrational excitation from vertical direction, because water can only be isolated in lower floor's isolation mounting 22
Square to vibrational excitation signal, vertical direction vibration signal is not weakened, and being transmitted to upper strata vibration isolation by intermediate connecting platform 2 fills
23, when upper strata isolation mounting 23 is by direction vibrational excitation are put, support spring 13 can be moved along support spring guide post 12, be compressed
Or release support spring 13, form positive rigidity mechanism；Support spring 13 deformation can cause support slipper 11, connecting plate 10 and
Carrier connecting platform 1 generates vertical direction movement together, and the vertical and straight movement of carrier connecting platform 1 can be made by ball pair and compression bar 17
It obtains compression spring 16 to compress or discharge, forms negative rigidity mechanism, positive negative rigidity mechanism passes through carrier connecting platform 1 and forms upper strata vibration isolation
The vibrational excitation from vertical direction is isolated in device 23 so that carrier vertical direction vibration signal subtracts on carrier connecting platform 1
It is weak.
Upper and lower two layers of isolation mounting is connected by intermediate connecting platform, forms two-freedom isolation mounting, and equipment is carried out
Two-freedom vibration isolation.
Embodiment 8：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 1, the difference is that
12 upper end of support spring guide post passes through the affixed limiting cover board 8 of bolt.When the support slipper 11 for connecting support spring 13 moves up, limit
Position cover board 8 plays position-limiting action.
The quantity of support spring guide post 12 is three, and the distance between two neighboring support spring guide post 12 is equal, three
Support spring guide post 12 is uniformly at intervals in intermediate 2 center of connecting platform with 120 °.
Embodiment 9：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 8, the difference is that
It limits 8 lower section of cover board and is equipped with rubber pad 9.When being moved at limited cover plate 8 on support slipper 11, rubber pad 9 can play cushioning effect.
Embodiment 10：
A kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, structure as described in Example 1, the difference is that
3 lower section of mobile base is equipped with universal wheel 4.Universal wheel 4 is connected by 4 bolts with mobile base, and 4 universal wheels 4 are with 90 ° of intervals
It is distributed in mobile base diagonal.
Although the present invention is disclosed above with preferred embodiment, it is not limited to the range that the present invention is implemented.Any
The those of ordinary skill in field in the invention scope for not departing from the present invention, improves when can make a little, i.e., every according to this hair
Bright done equal improvement, should be the scope of the present invention and is covered.
Claims (10)
1. a kind of positive and negative Stiffness low frequency vibration isolation device of two-freedom, which is characterized in that including upper strata isolation mounting and lower floor
Isolation mounting；
Lower floor's isolation mounting includes mobile base, and mobile base upper surface is equipped with stent, and stent is equipped with guide rail, is arranged on guide rail
There are spring and sliding block, spring one end is connect with stent, and spring other end connection sliding block, mobile base upper surface is additionally provided with magnet；
Upper strata isolation mounting includes intermediate connecting platform, sliding block, carrier connecting platform, and support bullet is equipped with above intermediate connecting platform
Spring guide post is arranged with support spring on support spring guide post, and support spring one end is contacted with intermediate connecting platform, and support spring is another
One end is contacted with support slipper；Carrier connecting platform is connect by connecting plate with support slipper；
Compression spring pedestal is additionally provided with above intermediate connecting platform, compression spring pedestal is equipped with compression spring chamber, and compression spring intracavitary is equipped with compression spring, compression spring
One end is connected with adjusting screw, and the compression spring other end is connect with compression bar, and compression bar is connect with carrier connecting platform；
Sliding block side is connect with intermediate connecting platform；Magnet, the magnet of mobile base upper surface are equipped with below intermediate connecting platform
It is arranged side by side with the magnet below intermediate connecting platform.
2. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 1, which is characterized in that mobile base
For rectangular flat, the quantity of stent is four, and branch is set up on four angles of mobile base；The quantity of guide rail is two, and guide rail connects
It is connected between two opposite stents.
3. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 2, which is characterized in that guide rail is circle
Cylinder, sliding block side are bolted with intermediate connecting platform.
4. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 3, which is characterized in that two guide rails
Axis be mutually parallel, the axis of two guide rails is located in the same horizontal plane.
5. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 4, which is characterized in that magnet and magnetic
Opposite plane is parallel with the axis of guide rail between iron.
6. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 1, which is characterized in that mobile base
Upper surface is set there are two magnet, is set below intermediate connecting platform there are one magnet, in horizontal direction below intermediate connecting platform
Magnet is located between the magnet of mobile base upper surface two, and the opposite face of magnet is set for magnetic repulsion.
7. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 1, which is characterized in that compression spring is another
End is connect by ball pair with compression bar, and compression bar is connect by ball pair with carrier connecting platform；Compression spring pedestal is connected by bolt and centre
Connect platform connection.
8. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 1, which is characterized in that centre connection
Platform is rectangular flat, and compression spring pedestal is set on four angles of intermediate connecting platform；
Preferably, compression spring pedestal there are two being set on each angle of intermediate connecting platform.
9. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 1, which is characterized in that support spring
Limiting cover board is equipped with above guide post；
Preferably, the quantity of support spring guide post is three, and the distance between two neighboring support spring guide post is equal；
It is further preferred that it is equipped with rubber pad below limiting cover board.
10. the positive and negative Stiffness low frequency vibration isolation device of two-freedom according to claim 1, which is characterized in that mobile bottom
Seat lower section is equipped with universal wheel.
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| CN201711419389.3A CN108167363B (en) | 2017-12-25 | 2017-12-25 | Two-degree-of-freedom positive and negative stiffness parallel low-frequency vibration isolation device |
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| CN201711419389.3A CN108167363B (en) | 2017-12-25 | 2017-12-25 | Two-degree-of-freedom positive and negative stiffness parallel low-frequency vibration isolation device |
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| CN108167363B CN108167363B (en) | 2020-04-17 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109385937A (en) * | 2018-12-18 | 2019-02-26 | 浙江天铁实业股份有限公司 | A kind of negative stiffness vibration absorber |
| CN109435800A (en) * | 2018-12-21 | 2019-03-08 | 安徽工程大学 | Low frequency vibration isolation seat |
| CN109532589A (en) * | 2018-12-21 | 2019-03-29 | 安徽工程大学 | Double-layer vibration isolating seat |
| CN110259864A (en) * | 2019-06-28 | 2019-09-20 | 北京无线电测量研究所 | A kind of decoupling isolation mounting |
| CN111335496A (en) * | 2020-03-17 | 2020-06-26 | 东北大学秦皇岛分校 | Nonlinear negative stiffness multidimensional vibration damper |
| CN113060398A (en) * | 2021-03-19 | 2021-07-02 | 深圳市爱租机科技有限公司 | Transport collision-prevention device for rental machine and working method thereof |
| CN113218605A (en) * | 2021-04-08 | 2021-08-06 | 中国科学院声学研究所 | Movable ultralow-vibration large-scale equipment test platform |
| CN113623346A (en) * | 2021-07-09 | 2021-11-09 | 北京科技大学 | Broadband vibration isolator with periodic structure |
| CN117052829A (en) * | 2023-09-15 | 2023-11-14 | 北京科技大学 | Parallel tension integral quasi-zero stiffness vibration isolator |
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