CN208519096U - A vibration isolator with parallel positive and negative stiffness - Google Patents
A vibration isolator with parallel positive and negative stiffness Download PDFInfo
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- CN208519096U CN208519096U CN201820993778.0U CN201820993778U CN208519096U CN 208519096 U CN208519096 U CN 208519096U CN 201820993778 U CN201820993778 U CN 201820993778U CN 208519096 U CN208519096 U CN 208519096U
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- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 238000013016 damping Methods 0.000 claims description 17
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 230000002459 sustained effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 8
- 230000003068 static effect Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000010358 mechanical oscillation Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
本实用新型公开了一种正负刚度并联的隔振器，包括壳体、正刚度机构、负刚度机构、安装台和导柱，所述正刚度机构安装于所述壳体的底面，且正刚度机构上端与所述负刚度机构下端连接，所述负刚度机构上端与安装台连接，且四周与壳体连接，所述安装台的四个角空套安装于导柱上，所述导柱固定安装在壳体的四个角上。本实用新型静态时有较高的承载能力，动态时又有较低的刚度，适用于低频振动下的隔振降噪，具有一定的隔振频带。
The utility model discloses a vibration isolator with positive and negative stiffness in parallel, comprising a casing, a positive stiffness mechanism, a negative stiffness mechanism, a mounting table and a guide post. The positive stiffness mechanism is mounted on the bottom surface of the casing, and the positive stiffness mechanism is positive The upper end of the rigidity mechanism is connected with the lower end of the negative rigidity mechanism, the upper end of the negative rigidity mechanism is connected with the installation table, and the surrounding is connected with the shell, the four corners of the installation table are installed on the guide post, the guide post It is fixedly installed on the four corners of the housing. The utility model has high bearing capacity in static state and low rigidity in dynamic state, is suitable for vibration isolation and noise reduction under low frequency vibration, and has a certain vibration isolation frequency band.
Description
Technical field
The utility model belongs to antivibration area, specifically, the utility model relates to a kind of positive and negative Stiffness
Vibration isolator.
Background technique
Mechanical oscillation are very common in production and living, it is not necessary to mechanical oscillation can seriously affect precise processing precision with
Apparatus measures accuracy, in addition, the vibration and noise in production and living also will affect people's lives, therefore mechanical oscillation every
Vibration technology and the demand of isolation mounting are more and more, there is different requirements to the performance of vibration isolator, and it is small to be frequently run onto vibration source amplitude
With the lower vibration isolation problems of driving frequency, it is desirable that have higher bearing capacity when vibration isolator static state, when dynamic have again it is lower just
Degree, common vibration isolator effectiveness in vibration suppression are simultaneously bad.
Summary of the invention
The utility model has a higher bearing capacity when providing a kind of static state, and there is the vibration isolation of lower rigidity in when dynamic again
Device, i.e., with the vibration isolator of connecting rod-spring negative rigidity mechanism and the positive rigidity mechanism parallel connection of damping spring.
To achieve the goals above, the technical solution that the utility model is taken are as follows: a kind of vibration isolator of positive and negative Stiffness,
Including shell, positive rigidity mechanism, negative rigidity mechanism, erecting bed and guide post, positive rigidity mechanism is installed on the bottom surface of the shell, institute
Shu Zheng rigidity mechanism includes elastic damping damper and lifting seat, the elastic damping damper be arranged above lifting seat and with
Lifting seat is fixedly connected, and the lifting seat lower end is threadedly coupled with shell, the upper end of the elastic damping damper and negative stiffness
The connection of mechanism lower end, the negative rigidity mechanism include Negative stiffness spring, adjustment sliding block, connecting rod slider, horizontal guide, adjustment spiral shell
Bolt, connecting rod, support rod, pin, hinged block and sleeve, the Negative stiffness spring be clamped in the adjustment sliding block and connecting rod slider it
Between boss on, described horizontal guide one end is screw thread, passes through the connecting rod slider and adjusts and sliding block and connect with shell, described
Adjustment bolt is threadedly coupled with shell, and with adjustment shoe contact, the both ends of the connecting rod by pin respectively with connecting rod slider
Hinged with hinged block, the hinged block is sleeved on support rod, and the lower end of the support rod and the elastic damping damper connect
It connects, upper end passes through the sleeve and connects with erecting bed, and four angle empty sets of the erecting bed are installed on guide post, and the guide post is solid
Dingan County is on four angles of shell.
Preferably, the shell is the uncovered shell structure of cuboid, length and width is equal, on the shell
Be provided with hole A, hole B, the tetra- kinds of holes hole C and hole D, the hole A is threaded hole, positioned at the bottom center of shell at, be used for it is described
The height of positive rigidity mechanism, Shi Zheng rigidity mechanism and negative rigidity mechanism can be changed in the connection of lifting seat lower thread, adjustment lifting seat
In static balance state, the hole B is threaded hole, and hole B is located on the symmetrical middle line of housing side, simultaneously for mounting and adjusting bolt
With nut check adjustment bolt on shell, respectively there are a hole C in the hole two sides B, and hole B and two hole C are located at sustained height position,
Hole C is unthreaded hole, and for the horizontal guide to be fixedly connected on shell by nut, the hole D is the blind hole of certain depth,
The upper end at four angles of shell is set, for installing guide post.
The arrangement preferably, negative rigidity mechanism is centrosymmetric, the adjustment bolt for push adjustment sliding block with
The pre compressed magnitude for changing Negative stiffness spring, to change the rigidity of the negative rigidity mechanism.
Preferably, the erecting bed is provided with for the pilot hole across guide post and for installing by the peace of device for vibration insutation
Fill hole；In the course of work, erecting bed only along guide post single-degree of freedom vibration, to increase the stability of structure.
The utility model compared with the prior art, have the following advantages that and the utility model has the advantages that the utility model be based on it is positive and negative just
Principle of parallel is spent, using the vibration isolator technical solution of connecting rod-spring negative rigidity mechanism and the positive rigidity mechanism parallel connection of damping spring, and
Negative stiffness is adjustable, there is higher bearing capacity when static, and there is lower rigidity in when dynamic again, and superlow frequency vibration isolating may be implemented, have
There is certain vibration isolation frequency band.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the vibration isolator of the positive and negative Stiffness of the utility model.
Fig. 2 is the structural schematic diagram of the positive rigidity mechanism of the vibration isolator of the positive and negative Stiffness of the utility model.
Fig. 3 is the structural schematic diagram of the negative rigidity mechanism of the vibration isolator of the positive and negative Stiffness of the utility model.
Fig. 4 is the half sectional view of the shell of the vibration isolator of the positive and negative Stiffness of the utility model.
In figure: 1 shell, 101 hole A, 102 hole B, 103 hole C, 104 hole D, 2 positive rigidity mechanisms, 201 damping springs
Damper, 202 lifting seats, 3 negative rigidity mechanisms, 301 Negative stiffness springs, 302 adjustment sliding blocks, 303 connecting rod sliders, 304
Horizontal guide, 305 adjustment bolts, 306 connecting rods, 307 support rods, 308 pins, 309 hinged blocks, 310 sleeves, 4 installations
Platform, 5 guide posts.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Referring to figures 1-3, a kind of vibration isolator of positive and negative Stiffness, including shell 1, positive rigidity mechanism 2, negative rigidity mechanism
3, erecting bed 4 and guide post 5, positive rigidity mechanism 2 are installed on the bottom surface of the shell 1, and the positive rigidity mechanism 2 includes elastic damping
Damper 201 and lifting seat 202, the elastic damping damper 201 are arranged above lifting seat 202 and consolidate with lifting seat 202
Fixed connection, 202 lower end of lifting seat are threadedly coupled with shell 1, the upper end of the elastic damping damper 201 and negative stiffness machine
The connection of 3 lower end of structure, the negative rigidity mechanism 3 include Negative stiffness spring 301, adjustment sliding block 302, connecting rod slider 303, horizontal guide
304, adjustment bolt 305, connecting rod 306, support rod 307, pin 308, hinged block 309 and sleeve 310, the Negative stiffness spring
301 are clamped on the boss between the adjustment sliding block 302 and connecting rod slider 303, and described 304 one end of horizontal guide is screw thread,
It connecting across the connecting rod slider 303 and adjustment sliding block 302 and with shell 1, the adjustment bolt 305 is threadedly coupled with shell 1,
And contacted with adjustment sliding block 302, the both ends of the connecting rod 306 by pin 308 respectively with connecting rod slider 303 and hinged block 309
Hingedly, the hinged block 309 is sleeved on support rod 307, the lower end of the support rod 307 and the elastic damping damper
201 connections, upper end passes through the sleeve 310 and erecting bed 4 connects, and four angle empty sets of the erecting bed 4 are installed on guide post 5
On, the guide post 5 is fixedly mounted on four angles of shell 1.
Referring to figures 1-4, the shell 1 is the uncovered shell structure of cuboid, and length and width is equal, the shell
Hole A101, hole B102, the tetra- kinds of holes hole C103 and hole D104 are provided on body 1, the hole A101 is threaded hole, positioned at shell 1
At bottom center, for connecting with 202 lower thread of lifting seat, the height of positive rigidity mechanism 2 is can be changed in adjustment lifting seat 202
Degree, Shi Zheng rigidity mechanism 2 and negative rigidity mechanism 3 are in static balance state, and the hole B102 is threaded hole, and hole B102 is located at shell
On the symmetrical middle line of 1 side, for mounting and adjusting bolt 305 and with nut check adjustment bolt 305 in shell 1, hole B102
Respectively there are a hole C103 in two sides, and hole B102 and two hole C103 are located at sustained height position, and hole C103 is unthreaded hole, are used for institute
It states horizontal guide 304 to be fixedly connected on shell 1 by nut, the hole D104 is the blind hole of certain depth, is arranged in shell 1
The upper end at four angles, for installing guide post 5.
Referring to Fig. 3, the negative rigidity mechanism 3 is centrosymmetric arrangement, and the adjustment bolt 305 is for pushing adjustment sliding block
302 to change the pre compressed magnitude of Negative stiffness spring 301, to change the rigidity of the negative rigidity mechanism 3, is conducive to reach this reality
With the quasi- zero stiffness state of New Type Vibration Isolator Using.
Referring to Fig. 1, the erecting bed 4 is provided with for the pilot hole across guide post 5 and for installing by device for vibration insutation
Mounting hole；In the course of work, erecting bed 4 only along 5 single-degree of freedom vibration of guide post, to increase the stability of structure.
Further understand the utility model for the ease of technical staff, combined with specific embodiments below with Fig. 1-4 pairs of this realities
It is elaborated with the novel course of work: being mounted on the erecting bed 4 by device for vibration insutation, by adjusting the control of lifting seat 202
Height of the damping spring shock absorber 201 relative to shell 1 is made, adjustment bolt 305 adjusts the precommpression of Negative stiffness spring 301
For amount to change its rigidity, Shi Zheng rigidity mechanism 2 and negative rigidity mechanism 3 are in static balance and quasi- zero stiffness state, work in vibration isolation
In the process, external exciting force makes erecting bed 4 make single-degree of freedom vibration only along guide post 5, by positive rigidity mechanism 2 and negative stiffness machine
The damping effect in parallel of structure 3 reaches vibration isolation purpose to reduce vibration.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of vibration isolator of positive and negative Stiffness, which is characterized in that including shell (1), positive rigidity mechanism (2), negative stiffness machine
Structure (3), erecting bed (4) and guide post (5), positive rigidity mechanism (2) are installed on the bottom surface of the shell (1), the positive rigidity mechanism
It (2) include elastic damping damper (201) and lifting seat (202), the elastic damping damper (201) is arranged in lifting seat
(202) it is fixedly connected above and with lifting seat (202), lifting seat (202) lower end is threadedly coupled with shell (1), the bullet
The upper end of property damping shock absorber (201) is connect with negative rigidity mechanism (3) lower end, and the negative rigidity mechanism (3) includes negative stiffness bullet
Spring (301), adjustment sliding block (302), connecting rod slider (303), horizontal guide (304), adjustment bolt (305), connecting rod (306), branch
Strut (307), pin (308), hinged block (309) and sleeve (310), the Negative stiffness spring (301) are clamped in the adjustment
On boss between sliding block (302) and connecting rod slider (303), described horizontal guide (304) one end is screw thread, passes through the connecting rod
Sliding block (303) and adjustment and are connect sliding block (302) with shell (1), and the adjustment bolt (305) is threadedly coupled with shell (1), and
Contact with adjustment sliding block (302), the both ends of the connecting rod (306) by pin (308) respectively with connecting rod slider (303) and hingedly
Hingedly, the hinged block (309) is sleeved on support rod (307) block (309), the lower end of the support rod (307) and the bullet
Property damping shock absorber (201) connect, upper end pass through the sleeve (310) and erecting bed (4) connection, the four of the erecting bed (4)
A angle empty set is installed on guide post (5), and the guide post (5) is fixedly mounted on four angles of shell (1).
2. the vibration isolator of positive and negative Stiffness according to claim 1, which is characterized in that the shell (1) is cuboid
The uncovered shell structure of shape, length and width is equal, is provided with hole A(101 on the shell (1)), hole B(102), hole C
(103) and hole D(104) four kinds of holes, the hole A(101) be threaded hole, the bottom center for being located at shell (1) locates, be used for it is described
The connection of lifting seat (202) lower thread, the hole B(102) it is threaded hole and is located on the symmetrical middle line of shell (1) side, it uses
In mounting and adjusting bolt (305) and with nut check adjustment bolt (305) on shell (1), hole B(102) two sides respectively have one
Hole C(103), and hole B(102) and two hole C(103) be located at sustained height position, hole C(103) it is unthreaded hole, it is used for the water
Flat guide rod (304) is fixedly connected on shell (1) by nut, the hole D(104) be certain depth blind hole, be arranged in shell
The upper end at (1) four angle of body, for installing guide post (5).
3. the vibration isolator of positive and negative Stiffness according to claim 1, which is characterized in that the negative rigidity mechanism (3) is in
It is centrosymmetrically arranged.
4. the vibration isolator of positive and negative Stiffness according to claim 1, which is characterized in that the erecting bed (4) is provided with
For passing through the pilot hole of guide post (5) and for installing by the mounting hole of device for vibration insutation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820993778.0U CN208519096U (en) | 2018-06-27 | 2018-06-27 | A vibration isolator with parallel positive and negative stiffness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820993778.0U CN208519096U (en) | 2018-06-27 | 2018-06-27 | A vibration isolator with parallel positive and negative stiffness |
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| Publication Number | Publication Date |
|---|---|
| CN208519096U true CN208519096U (en) | 2019-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820993778.0U Expired - Fee Related CN208519096U (en) | 2018-06-27 | 2018-06-27 | A vibration isolator with parallel positive and negative stiffness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208519096U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345195A (en) * | 2019-07-16 | 2019-10-18 | 北京北方华创微电子装备有限公司 | Vibration absorber, blower fan system and semiconductor heat treatment equipment |
| CN111577806A (en) * | 2020-06-01 | 2020-08-25 | 中国船舶科学研究中心 | Positive and negative rigidity parallel type low-frequency vibration isolator |
| CN111810581A (en) * | 2020-05-27 | 2020-10-23 | 厦门大学 | A Large-scale Precision Vibration Isolation Platform Based on Air Springs |
| CN112112928A (en) * | 2020-10-21 | 2020-12-22 | 哈尔滨工程大学 | Vibration control structure with vibration isolation and vibration absorption integrated performance |
| CN118308918A (en) * | 2024-05-08 | 2024-07-09 | 华东交通大学 | A quasi-zero stiffness vibration damping fastener structure based on a slider connecting rod |
-
2018
- 2018-06-27 CN CN201820993778.0U patent/CN208519096U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345195A (en) * | 2019-07-16 | 2019-10-18 | 北京北方华创微电子装备有限公司 | Vibration absorber, blower fan system and semiconductor heat treatment equipment |
| CN111810581A (en) * | 2020-05-27 | 2020-10-23 | 厦门大学 | A Large-scale Precision Vibration Isolation Platform Based on Air Springs |
| CN111577806A (en) * | 2020-06-01 | 2020-08-25 | 中国船舶科学研究中心 | Positive and negative rigidity parallel type low-frequency vibration isolator |
| CN111577806B (en) * | 2020-06-01 | 2022-02-18 | 中国船舶科学研究中心 | Positive and negative rigidity parallel type low-frequency vibration isolator |
| CN112112928A (en) * | 2020-10-21 | 2020-12-22 | 哈尔滨工程大学 | Vibration control structure with vibration isolation and vibration absorption integrated performance |
| CN118308918A (en) * | 2024-05-08 | 2024-07-09 | 华东交通大学 | A quasi-zero stiffness vibration damping fastener structure based on a slider connecting rod |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190219 Termination date: 20190627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |