CN109578483A - Quasi- zero stiffness isolation mounting - Google Patents
Quasi- zero stiffness isolation mounting Download PDFInfo
- Publication number
- CN109578483A CN109578483A CN201811494664.2A CN201811494664A CN109578483A CN 109578483 A CN109578483 A CN 109578483A CN 201811494664 A CN201811494664 A CN 201811494664A CN 109578483 A CN109578483 A CN 109578483A
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- CN
- China
- Prior art keywords
- outer ring
- disc spring
- euler
- support outer
- quasi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
- F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction
- F16F3/12—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction the steel spring being in contact with the rubber spring
Abstract
A kind of quasi- zero stiffness isolation mounting, including disc spring vibration isolating mechanism and Euler's bar vibration isolating mechanism, disc spring vibration isolating mechanism includes mounting assembly, intermediate shaft assembly and fluting disc spring, mounting assembly includes the cylindric support outer ring of upper and lower opening, support outer ring extend horizontally away pedestal, intermediate shaft assembly includes the jackshaft being concentrically disposed in support outer ring, upper cover, upper cover is fixedly connected on the upper end of jackshaft, at least one fluting disc spring is set on jackshaft, and, on the radially inner side insertion jackshaft for disc spring of slotting, radial outside is embedded on support outer ring；Euler's bar vibration isolating mechanism includes Euler's bar, and Euler's bar is located at the outside of support outer ring, and is connected between support outer ring and the pedestal.The present invention is both vertically as well as horizontally having good vibration isolation capability.Load adjustment unit is introduced, broader load range is applicable to.The washer that rubber material is introduced between disc spring and upper bottom support surface, can reduce frictional damping influences microvibration effectiveness in vibration suppression.
Description
Technical field
The present invention relates to vibration isolation technique fields, specifically, being related to a kind of quasi- zero stiffness isolation mounting.
Background technique
Vibration is the industrial most common problem.Equipment with rotating unit would generally generate vibration, moreover, equipment is got over
The vibration level often generated greatly is higher.The vibration of high-magnitude can reduce equipment dependability and service life, and eventually lead to economic damage
It becomes estranged structural failure；Vibration also can cause adverse effect to people's health, moreover, the direct shadow of noise that high-frequency vibration generates
Ring the working and learning of people.Therefore, most important to the control of vibration.Mainly there are active vibration isolation, half master for vibration control
Dynamic and three kinds of modes of passive vibration isolation, the factors such as complexity and cost, it is passive vibration isolation that application, which is at most mode, at present.According to
Theory of Vibration, it is system frequency that passive vibration isolation, which originates effective isolation frequency,Times, its lower vibration isolation of system frequency
Range is bigger, and effect is better.But it for traditional structure, reduces intrinsic frequency and means that reduction system Static stiffness or increase
Mass of system, so that static system displacement be caused to increase.To overcome the above disadvantages, ideal vibration isolating mechanism should have simultaneously
Higher static rigidity and lower dynamic rate guarantee that system frequency is lower while bearing higher load, are
The isolation frequency range of system is bigger, and vibration isolating effect is more preferable.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of quasi- zero stiffness isolation mounting, including disc spring vibration isolating mechanism and
Euler's bar vibration isolating mechanism, the disc spring vibration isolating mechanism include that mounting assembly, intermediate shaft assembly and fluting disc spring, mounting assembly include
The cylindric support outer ring of upper and lower opening, the support outer ring extend horizontally away pedestal, and intermediate shaft assembly includes concentrically setting
Jackshaft in support outer ring, upper cover are set, the upper cover is fixedly connected on the upper end of jackshaft, at least one fluting disc spring set
It is located on jackshaft, also, on the radially inner side insertion jackshaft of the fluting disc spring, radial outside is embedded in support outer ring
On；Euler's bar vibration isolating mechanism includes Euler's bar, and Euler's bar is located at the outside of support outer ring, and is connected to support outer ring
Between the pedestal.
Preferably, mounting assembly further includes outer ring, and side is extended in first radially inward for the bottom end of the support outer ring
Shoulder, outer ring coaxially cover in support outer ring first on shoulder, also, be axially formed in the radially inner side of outer ring
At least one outside holding tank；Intermediate shaft assembly further includes inner ring and retaining ring, and inner ring is fixed on the outer of jackshaft by retaining ring
Zhou Shang, the radial outside of inner ring it is axially disposed have accommodate the identical inside holding tank of slot number with outside；The fluting dish
The radially inner side of spring is embedded into the inside holding tank, and the radial outside of the fluting disc spring is embedded in the outside holding tank
It is interior.
Preferably, the outer ring radially inner side is axially disposed at least one outer ring spacer mounting groove, outer ring spacer peace
In outer ring spacer mounting groove, and the radially inner side of each outer ring spacer is provided with the outside holding tank；In described
Ring radial outside is axially disposed at least one inner ring washer mounting groove, and inner ring washer is mounted in inner ring washer mounting groove,
And the radial outside of each inner ring washer is provided with the inside holding tank, wherein the inner ring washer and outer ring spacer
For rubber material.
It preferably, further include capping, the capping is fixedly connected with the upper end of support outer ring, and the upper cover extends limit
Portion to the lower end of capping.
Preferably, at least one fluting disc spring slotted section height H and thickness t ratio 1.39~1.41 it
Between.
Preferably, the groove of at least one fluting disc spring is radially gradually increased from inside to outside.
Preferably, it is additionally provided with load control unit, the load control unit includes load control spring, adjusts spiral shell
Nail, the adjusting screw are connected through a screw thread with support outer ring, and the jackshaft is that hollow and lower end has shoulder in second, institute
It states adjusting screw the load control spring for being set in its periphery is mounted in second on shoulder.
Preferably, the adjusting screw is mounted on platform in second by the load control spring that pressure cap will be set in its periphery
On shoulder.
Preferably, Euler's bar vibration isolating mechanism further includes the clump weight for being removably mounted on each Euler's bar top.
Preferably, circumferencial direction of 4 Euler's bars along support outer ring is uniformly distributed.
The utility model has the advantages that
(1) present invention is connected using the vibration isolating mechanism of fluting disc spring composition with Euler's bar vibration isolating mechanism, vibration isolation machine after series connection
Structure is both vertically as well as horizontally having good cushioning ability, can better conform to various working vibration damping needs.
(2) present invention introduces load adjustment unit in the vibration isolating mechanism that vertical direction is made of disc spring, so that originally only
It is that can be adapted for broader load range for the zero disc spring mechanism of standard of specific load, improves the practicability of vibration isolator.
(3) present invention introduces the washer of rubber material between disc spring and upper bottom support surface, is stretched using rubber structure elasticity
Contracting replaces original fricting movement, and can reduce frictional damping influences microvibration effectiveness in vibration suppression.
Detailed description of the invention
By the way that embodiment is described in conjunction with following accompanying drawings, features described above of the invention and technological merit will become
More understands and be readily appreciated that.
Fig. 1 is the half sectional view for indicating the quasi- zero stiffness isolation mounting of the embodiment of the present invention；
Fig. 2 is the floor map for indicating the fluting disc spring of the embodiment of the present invention；
Fig. 3 is the sectional view along A-A of Fig. 2；
Fig. 4 is the nondimensional displacement-load for indicating the fluting disc spring of quasi- zero stiffness isolation mounting of the embodiment of the present invention
Characteristic；
Fig. 5 is the nondimensional displacement-rigidity for indicating the fluting disc spring of quasi- zero stiffness isolation mounting of the embodiment of the present invention
Characteristic.
Wherein, 1 upper cover；2 connection bolts；3 jackshafts；4 cappings；5 inner ring；6 inner ring washers；7 outer ring spacers；8 outer rings；9
Fluting disc spring；10 support outer rings；11 pedestals；12 retaining rings；13 load control springs；14 load control screws；15 pressure caps；16 Europe
Pull rod；17 clump weights；18 clump weights tighten screw.
Specific embodiment
The embodiment of quasi- zero stiffness isolation mounting of the present invention described below with reference to the accompanying drawings.This field it is common
Technical staff will recognize, without departing from the spirit and scope of the present invention, can with a variety of different modes or
A combination thereof is modified described embodiment.Therefore, attached drawing and description are regarded as illustrative in nature, rather than for limiting
Scope of protection of the claims processed.In addition, in the present specification, attached drawing is drawn not in scale, and identical appended drawing reference table
Show identical part.
Term is explained:
Butterfly spring: the washer type spring of manufactured truncated cone tee section is forged and pressed with metal blank or forging and stamping blank.
Fluting butterfly spring: fluting butterfly spring is made of the radial groove outputed on common butterfly spring from inside to outside
's.With the common butterfly spring ratio of respective diameters, it can generate biggish deformation under lesser load, and therefore, it is combined
Some advantages of both butterfly spring and cantilever leaf spring.
Rigidity: the ability of structure resistance to deformation in stress.Calculation formula is K=P/ δ, and wherein P represents load, and δ is represented
Deflection；For the system that rigidity changes with deflection, rigidity expression formula is rewritten as K=Δ P/ Δ δ, and wherein Δ P represents load
Variable quantity, Δ δ represent deflection variable quantity.
Quasi- zero stiffness: structure of the system stiffness close to zero.According to stiffness changing structure rigidity defined formula K=Δ P/ Δ δ, when
When displacement structure amount Δ δ changes, if load change amount Δ P is very small, close to zero, the system at this time rigidity close to zero,
Referred to as quasi- zero stiffness system.
Spring stiffness at the end: equivalent stiffness is K1*k2/ (K1+K2) when two rigidity are K1 and the spring of K2 is connected, equivalent
Rigidity is smaller than wherein minimum spring rate.
As shown in Figure 1, quasi- zero stiffness isolation mounting includes disc spring vibration isolating mechanism and Euler's bar vibration isolating mechanism, the disc spring every
Vibration mechanism includes mounting assembly, intermediate shaft assembly and fluting disc spring 9, and mounting assembly includes outside the cylindric support of upper and lower opening
Circle 10, the support outer ring 10 extend horizontally away pedestal 11, and intermediate shaft assembly includes being concentrically disposed in support outer ring 10
Jackshaft 3, upper cover 1, upper cover 1 are coaxially fixedly connected on the upper end of jackshaft 3, can be connected to using such as connection bolt 2
Together.At least one fluting disc spring 9 is set on jackshaft 3, uses 4 fluting disc springs 9 as shown in Figure 1, wherein fluting dish
The structure of spring is as shown in Figure 2 and Figure 3.Four fluting disc springs are connected in parallel, and on the one hand increase structural-load-carrying capacity, on the other hand
Make structure that there is certain resistance to capsizing.Also, on the radially inner side insertion jackshaft 3 of the fluting disc spring 9, radial outside is embedding
Enter on support outer ring 10.
Euler's bar vibration isolating mechanism includes Euler's bar 16, and Euler's bar 16 is located at the outside of support outer ring 10, and even
It is connected between support outer ring 10 and the pedestal 11.For example, boss is extended in the upper end of support outer ring 10, Euler's bar 16 is supported on
Between boss lower end and pedestal 11.Preferably, the circumferencial direction using 4 Euler's bars 16 along support outer ring 10 is evenly arranged.
Two damper mechanisms are cascaded work by support outer ring 10, both vertically as well as horizontally mobile decoupling, mutually not
Interference.In the work of quasi- zero stiffness isolation mounting, pedestal 11 is bolted with foundation, company is passed through by vibration isolation object
Connecting bolt is connected to the upper end of upper cover 1.Load is transmitted to four fluting disc springs 9 in parallel by jackshaft 3, is then passed to branch
Seat outer ring 10, then Euler's bar 16 is transmitted to by support outer ring 10, it is transmitted to pedestal 11 via Euler's bar 16, then be transmitted to basis.
The illustratively working principle of the device below, slot 9 uncompressed state of disc spring when slotted section height H and thick
The ratio of t is spent when close to 1.4, as vertical direction load increases its vertical direction load-displacement relation curve (such as Fig. 4, figure
Shown in 5) it just will appear horizontal (or close level) section.In the horizontal segment limit, fluting disc spring is compressed downwardly, but load
Size is basically unchanged, and system stiffness is close to zero, i.e., so-called quasi- zero stiffness characteristic.Cantilever of the every Euler's bar similar to axial carrying
Beam, Euler's bar horizontal rigidity is KS before carrying weight, since " beam column " effect can generate a horizontal negative stiffness KN, Europe after carrying
Pull rod real standard rigidity becomes K=KS-KN, when load is progressively increased to close to the feature buckling load of Euler's bar, Euler
The horizontal rigidity of bar is close to zero.The device is mutually decoupled in vertically and horizontally freedom degree, and fluting disc spring is in vertical side
To vibration isolation, the vibration isolation in the horizontal direction of Euler's bar, the two is non-interference.
In one alternate embodiment, mounting assembly further includes outer ring 8, and the bottom end of the support outer ring 10 is radially inward
Shoulder 101 in first are extended in side, outer ring 8 coaxially cover in support outer ring 10 first on shoulder 101, also, outside
The radially inner side of ring 8 has been axially formed at least one outside holding tank 81；
Intermediate shaft assembly further includes inner ring 5 and retaining ring 10, and retaining ring 12 is fixed on inner ring 5 on the periphery of jackshaft 3,
The radial outside of inner ring 5 it is axially disposed have accommodate the identical inside holding tank 51 of slot number with outside；The fluting disc spring 9
Radially inner side be embedded into the inside holding tank 51, the radial outside of the fluting disc spring 9 is embedded in the outside and accommodates
In slot.
In one alternate embodiment, the radially inner side of the outer ring 8 is axially disposed at least one outer ring spacer peace
Tankage 82, outer ring spacer 7 are mounted in outer ring spacer mounting groove 82, and the radially inner side of each outer ring spacer 7 is provided with one
The outside holding tank 81；
The radial outside of the inner ring 5 is axially disposed at least one inner ring washer mounting groove 52, and inner ring washer 6 is installed
In interior ring pads circle mounting groove 52, and the radial outside of each inner ring washer 6 is provided with the inside holding tank 51.
Further, the inner ring washer 6 and outer ring spacer 7 are rubber material, so that fluting disc spring 9 and upper bottom support surface
Between be Elastic Contact, can reduce influence of the frictional damping to microvibration.
It in one alternate embodiment, further include capping 4, the capping 4 is fixedly connected with the upper end of support outer ring 10, institute
It states upper cover 1 and extends limiting section 102 to the lower end of capping 4.
In one alternate embodiment, the ratio of the height H and thickness t of the slotted section of at least one fluting disc spring 9 exist
Between 1.39~1.41.
In one alternate embodiment, the groove of at least one fluting disc spring 9 is radially gradually increased from inside to outside.
In one alternate embodiment, it is additionally provided with load control unit, the load control unit includes load control
Spring 13 adjusts screw 14,
The adjusting screw 14 is connected through a screw thread with support outer ring 10, and the jackshaft 3 is that hollow and lower end has the
Shoulder 31 in two, the load control spring 13 that the adjusting screw 14 will be set in its periphery are mounted in second on shoulder 31.
Load adjustment mechanism is introduced, changes the pretightning force of adjustment load control spring 13, load control spring 13 by adjusting screw 14
Pretightning force and by vibration isolation object full payload reach fluting disc spring 9 rated load when, the vertical direction of device reached standard zero just
Degree.
In one alternate embodiment, the load control bullet for adjusting screw 14 and being set in its periphery by pressure cap 15
Spring 13 is mounted in second on shoulder 31.
In one alternate embodiment, Euler's bar vibration isolating mechanism further includes being removably disposed in each Euler's bar 16
The clump weight 17 on top.Clump weight 17, which can be, tightens the top that screw 18 is mounted on Euler's bar 16 by clump weight.This place
Saying might not be mounted on Euler's bar 16 in 16 top of Euler's bar installation clump weight 17, and the stress of Euler's bar 16 is by support
Outer ring 10 is transmitted to Euler's bar 16, is mounted on support outer ring 10 so can also be.It can replace or add as needed and match
Pouring weight 17.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of quasi- zero stiffness isolation mounting, which is characterized in that including disc spring vibration isolating mechanism and Euler's bar vibration isolating mechanism,
The disc spring vibration isolating mechanism include mounting assembly, intermediate shaft assembly and fluting disc spring,
Mounting assembly includes the cylindric support outer ring of upper and lower opening, and the support outer ring extend horizontally away pedestal, jackshaft
Component includes the jackshaft being concentrically disposed in support outer ring, upper cover, and the upper cover is fixedly connected on the upper end of jackshaft, until
A few fluting disc spring is set on jackshaft, also, on the radially inner side insertion jackshaft of the fluting disc spring, radial outside
It is embedded on support outer ring；
Euler's bar vibration isolating mechanism includes Euler's bar, and Euler's bar is located at the outside of support outer ring, and is connected to outside support
Between circle and the pedestal.
2. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that
Mounting assembly further includes outer ring, and shoulder in first is extended in side radially inward for the bottom end of the support outer ring, and outer ring is same
It covers to axis in first in support outer ring on shoulder, also, has been axially formed outside at least one in the radially inner side of outer ring
Side holding tank；
Intermediate shaft assembly further includes inner ring and retaining ring, and retaining ring is fixed on inner ring on the periphery of jackshaft, in the diameter of inner ring
It is axially disposed outward to have inside holding tank identical with outside receiving slot number；
The radially inner side of the fluting disc spring is embedded into the inside holding tank, and the radial outside of the fluting disc spring is embedded in
In the outside holding tank.
3. quasi- zero stiffness isolation mounting according to claim 2, which is characterized in that the outer ring radially inner side is set along axial direction
It is equipped at least one outer ring spacer mounting groove, outer ring spacer is mounted in outer ring spacer mounting groove, and the diameter of each outer ring spacer
It is provided with the outside holding tank inwardly；
The inner ring radial outside is axially disposed at least one inner ring washer mounting groove, and inner ring washer is mounted on inner ring washer
In mounting groove, and the radial outside of each inner ring washer is provided with the inside holding tank,
Wherein, the inner ring washer and outer ring spacer are rubber material.
4. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that
It further include capping, the capping is fixedly connected with the upper end of support outer ring, and the upper cover extends limiting section to capping
Lower end.
5. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that the fluting portion of at least one fluting disc spring
The ratio of the height H and thickness t that divide are between 1.39~1.41.
6. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that the groove edge of at least one fluting disc spring
It is radial to be gradually increased from inside to outside.
7. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that
It is additionally provided with load control unit, the load control unit includes load control spring, adjusts screw,
The adjusting screw is connected through a screw thread with support outer ring, and the jackshaft is that hollow and lower end has shoulder in second,
The load control spring that the adjusting screw will be set in its periphery is mounted in second on shoulder.
8. quasi- zero stiffness isolation mounting according to claim 7, which is characterized in that the adjusting screw will be covered by pressure cap
The load control spring for being located at its periphery is mounted in second on shoulder.
9. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that Euler's bar vibration isolating mechanism further includes
It is removably mounted on the clump weight on each Euler's bar top.
10. quasi- zero stiffness isolation mounting according to claim 1, which is characterized in that circle of 4 Euler's bars along support outer ring
Circumferential direction is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494664.2A CN109578483A (en) | 2018-12-07 | 2018-12-07 | Quasi- zero stiffness isolation mounting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494664.2A CN109578483A (en) | 2018-12-07 | 2018-12-07 | Quasi- zero stiffness isolation mounting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109578483A true CN109578483A (en) | 2019-04-05 |
Family
ID=65929017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811494664.2A Pending CN109578483A (en) | 2018-12-07 | 2018-12-07 | Quasi- zero stiffness isolation mounting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109578483A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219443A (en) * | 2020-03-12 | 2020-06-02 | 奇瑞新能源汽车股份有限公司 | Quasi-zero stiffness vibration isolator based on magnetorheological elastomer |
| CN114060456A (en) * | 2021-11-29 | 2022-02-18 | 同济大学 | Quasi-zero stiffness shock absorber for railway vehicle seat |
-
2018
- 2018-12-07 CN CN201811494664.2A patent/CN109578483A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219443A (en) * | 2020-03-12 | 2020-06-02 | 奇瑞新能源汽车股份有限公司 | Quasi-zero stiffness vibration isolator based on magnetorheological elastomer |
| CN114060456A (en) * | 2021-11-29 | 2022-02-18 | 同济大学 | Quasi-zero stiffness shock absorber for railway vehicle seat |
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| CB03 | Change of inventor or designer information |
Inventor after: Li Yinshuai Inventor after: Han Xu Inventor after: Liu Binshuang Inventor before: Li Yinshuai Inventor before: Han Xu Inventor before: Liu Binshuang Inventor before: Xu Yong |
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