CN108869626A - A kind of adjustable vibration-isolating platform of pyramid - Google Patents
A kind of adjustable vibration-isolating platform of pyramid Download PDFInfo
- Publication number
- CN108869626A CN108869626A CN201811101223.1A CN201811101223A CN108869626A CN 108869626 A CN108869626 A CN 108869626A CN 201811101223 A CN201811101223 A CN 201811101223A CN 108869626 A CN108869626 A CN 108869626A
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- Prior art keywords
- quasi
- upper plate
- axis
- zero
- isolating platform
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Classifications
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
- F16F15/035—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means by use of eddy or induced-current damping
Abstract
The present invention discloses a kind of adjustable vibration-isolating platform of pyramid, it may include upper plate and lower plate, the quasi- zero location structure of multiple groups is symmetrically connected between the upper plate and lower plate, every group of quasi- zero location structure includes three quasi- zero stiffness units, and the quasi- zero stiffness unit both ends pass through Hooks coupling universal coupling respectively and connect with the upper plate and lower plate；The tie point of three quasi- zero stiffness units and the upper plate in every group of quasi- zero location structure is formed by the diameter of a circle quasi- zero stiffness unit described less than three and the tie point of the lower plate is formed by diameter of a circle；The upper plate center offers cross recess, and the upper plate surrounding offers symmetrical through-hole, and the lower plate is identical with the upper plate structure.The adjustable vibration-isolating platform of pyramid provided by the invention, can be effectively reduced the dynamic stiffness of whole device, while not influence its quiet bearing capacity again, have very good anti-vibration performance.
Description
Technical field
The present invention relates to vibration-isolating platform technical fields, more particularly to a kind of adjustable vibration-isolating platform of pyramid.
Background technique
It vibrates very common in mechanical engineering field.In vibration processes, if extent of vibration is more than a certain range, not only
It can make that big noise can be generated, adverse effect is generated to its ambient enviroment, influences the working performance of equipment, shorten it and use the longevity
Life, makes related components fail, and seriously even can generate safety accident, generates threat to the security of the lives and property.Therefore, existing
In some mechanical equipment installations, the isolation mounting for the purpose of reducing vibration is the indispensable a part of entire product.In order to
The influence for installing fixed surface vibration to equipment is eliminated, vibration absorber is usually installed all between equipment and stationary plane.
Common vibration absorber is established on the basis of viscous damping and positive rigid spring model.It can by Theory of Vibration
Know, when the frequency of vibration is greater than intrinsic frequencyTimes when, the transport of vibration less than 1, i.e., be just of practical significance at this time on
Effectiveness in vibration suppression.Due to intrinsic frequencyThe intrinsic frequency of device and the rigidity of device entirety are positively correlated, with device
Quality be negatively correlated, i.e., the total quality of aggrandizement apparatus can reduce its intrinsic frequency, and the overall stiffness for reducing device also will
Reduce its intrinsic frequency.In order to obtain better anti-vibration performance, the past often by way of increasing quality or reduces the side of rigidity
Formula reduces intrinsic frequency, but this excessive, excessive, small problem of bearing capacity of quiet deformation that also results in device volume.
Summary of the invention
The object of the present invention is to provide a kind of adjustable vibration-isolating platforms of pyramid, exist to solve the above-mentioned prior art
The problem of, the dynamic stiffness of whole device can be effectively reduced, while not influencing its quiet bearing capacity again, there is very good vibration isolation
Performance.
To achieve the above object, the present invention provides following schemes：
The present invention provides a kind of adjustable vibration-isolating platform of pyramid, including upper plate and lower plate, the upper plate and lower plate
Between be symmetrically connected with the quasi- zero location structure of multiple groups, every group of quasi- zero location structure includes three quasi- zero stiffness units, described quasi- zero
Rigidity unit both ends pass through Hooks coupling universal coupling respectively and connect with the upper plate and lower plate；Three institutes in every group of quasi- zero location structure
The tie point for stating quasi- zero stiffness unit and the upper plate is formed by the diameter of a circle quasi- zero stiffness unit described less than three and institute
The tie point for stating lower plate is formed by diameter of a circle；The upper plate center offers cross recess, and the upper plate surrounding offers pair
The through-hole of title, the lower plate are identical with the upper plate structure.
Optionally, connecting shaft, the connecting shaft and described Hooks coupling universal coupling one end are installed on the quasi- zero stiffness unit
It is fixedly connected, is fixedly installed with wedge block on the upper plate and lower plate respectively, the wedge block lower end is provided with prominent cylinder, institute
It states the Hooks coupling universal coupling other end and is fixedly connected by prominent cylinder with the wedge block.
Optionally, the quasi- zero stiffness unit includes square tube；The square tube upper end is connected with cover, and lower end is connected with chassis
Lid；It is fixedly installed axis in the square tube, electromagnetic coil is wound on the axis, annular is provided on the outside of the electromagnetic coil forever
Magnet；The chassis lid top is connected with axis chassis by mechanical spring, and the axis chassis passes through the bottom of bolt and the axis
It is fixedly connected.
Optionally, the axis top is arranged with neck bush, and external bushing, the neck bush and institute are arranged on the neck bush
It states and is provided with the edge of a wing at the top of external bushing；The edge of a wing of the external bushing is located on the cover, and the edge of a wing of the external bushing with
It is fixedly connected between the edge of a wing of the neck bush by hexagon socket head cap screw.
Optionally, annular flange is provided among the axis, the electromagnetic coil is wound in below the annular flange
On the axis.
Optionally, the neck bush and the outer diameter of the shaft connection place are gradually reduced；The outer lining set upper side is sheathed on institute
It states on neck bush, lower end is sheathed on the axis.
Optionally, the annular permanent magnet and the square tube inner wall are in close contact, and the annular permanent magnet bottom is arranged
The cover bottom is set at the top of the square tube bottom, the annular permanent magnet.
Optionally, the one end of the connecting shaft is provided with screw thread, and threaded hole is offered at the top of the axis, the connecting shaft
The threaded hole of the end of thread and the axis is connected through a screw thread.
The present invention achieves following technical effect compared with the existing technology：
This invention device is that have the vibration isolation table of six-degree-of-freedom vibration isolation performance, based on " quasi- zero stiffness ", is had very
Good multidirectional anti-vibration performance.Using quasi- zero stiffness as unit, pyramid quadrangle vibration-isolating platform is constructed, structure is simple.Electromagnetic type
Structure can change stiffness characteristics by adjusting the size of electric current, while the sliding slot between upper and lower plate can be adjusted effectively
The height of platform, so that whole device, which is adjusted in actual installation environment with anti-vibration performance, all has stronger adaptability.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the adjustable vibration-isolating platform structural schematic diagram of pyramid of the present invention；
Fig. 2 is the adjustable vibration-isolating platform sectional view along A-A of pyramid of the present invention；
Fig. 3 is the quasi- zero location structural schematic diagram of every group of the adjustable vibration-isolating platform of pyramid of the present invention；
Fig. 4 is the quasi- zero stiffness cellular construction schematic diagram of the adjustable vibration-isolating platform of pyramid of the present invention；
Fig. 5 is the quasi- zero stiffness unit B-B of the adjustable vibration-isolating platform of pyramid of the present invention to cross-sectional view；
Wherein, 1 it is upper plate, 2 be the first hexagon socket head cap screw, 3 be spring shim, 4 be wedge block, 5 is Hooks coupling universal coupling, 6
It is lower plate for zero stiffness unit subject to connecting shaft, 7,8,9 be axis, 10 be neck bush, 11 be the second hexagon socket head cap screw, 12 is outer lining
Set, 13 be cover, 14 be square tube, 15 be annular permanent magnet, 16 be electromagnetic coil, 17 be axis chassis, 18 be chassis lid, 19 be machine
Tool spring, 20 be third hexagon socket head cap screw, 21 be cross recess, 22 be through-hole.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of adjustable vibration-isolating platforms of pyramid, exist to solve the above-mentioned prior art
The problem of, the dynamic stiffness of whole device can be effectively reduced, while not influencing its quiet bearing capacity again, there is very good vibration isolation
Performance.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of adjustable vibration-isolating platform of pyramid, as Figure 1-Figure 5, including upper plate 1 and lower plate
8, four groups of quasi- zero location structures are symmetrically connected between upper plate 1 and lower plate 8, every group of quasi- zero location structure includes three quasi- zero stiffness
Unit 7, quasi- 7 both ends of zero stiffness unit pass through Hooks coupling universal coupling 5 respectively and connect with upper plate 1 and lower plate 8；Every group of quasi- zero location structure
In three quasi- zero stiffness units 7 and the tie point of upper plate 1 be formed by less than three quasi- zero stiffness units 7 of diameter of a circle under
The tie point of plate 8 is formed by diameter of a circle；1 center of upper plate offers cross recess 21, and 1 surrounding of upper plate offers symmetrical through-hole
22, lower plate 8 is identical with 1 structure of upper plate.
It is further preferred that being equipped with connecting shaft 6 on quasi- zero stiffness unit 7, connecting shaft 6 and 5 one end of Hooks coupling universal coupling are solid
It is fixed to connect, it is fixedly installed with wedge block 4 respectively on upper plate 1 and lower plate 8,4 lower end of wedge block is provided with prominent cylinder, universal joint shaft
5 other end of device passes through prominent cylinder and is fixedly connected with wedge block 4.
Quasi- zero stiffness unit 7 includes square tube 14；14 upper end of square tube is connected with cover 13, and lower end is connected with chassis lid 18；Side
It is fixedly installed axis 9 in cylinder 14, electromagnetic coil 16 is wound on axis 9, annular permanent magnet 15 is provided on the outside of electromagnetic coil 16；Bottom
18 top of disk cover is connected with axis chassis 18 by mechanical spring 19, and axis chassis 18 is fixedly connected by bolt with the bottom of axis 9.Axis
9 tops are arranged with neck bush 10, and external bushing 12 is arranged on neck bush 10, is provided with the wing at the top of neck bush 10 and external bushing 12
Edge；The edge of a wing of external bushing 12 is located on cover 13, and passes through in second between the edge of a wing of external bushing 12 and the edge of a wing of neck bush 10
Hex bolts 11 is fixedly connected.
Annular flange is provided among axis 9, electromagnetic coil 16 is wound on the axis 9 below annular flange.Neck bush 10 with
The outer diameter of 9 junction of axis is gradually reduced；12 upper end of external bushing is sheathed on neck bush 10, and lower end is sheathed on axis 9, passes through second
Hexagon socket head cap screw 11 will connect between neck bush 10 and external bushing 12, and generate squeezing action, and axis 9 is locked.Annular permanent magnet
15 are in close contact with 14 inner wall of square tube, and 15 bottom of annular permanent magnet is set to 14 bottom of square tube, sets at the top of annular permanent magnet 15
It is placed in 13 bottom of cover.
Specifically, electromagnetic coil 16 is powered on by lead-out wire.Axis chassis 17 is attached by bolt with axis 9.Electricity
Magnetic coil 16 is fixed by the flange of axis 9 and axis chassis 17.Annular permanent magnet 15 is fixed by cover 13 with square tube.Chassis lid 18
It is connect by third hexagon socket head cap screw 20 with square tube 14.6 one end of connecting shaft is provided with screw thread, and the top of axis 9 offers threaded hole,
The end of thread of connecting shaft 6 and the threaded hole of axis 9 are connected through a screw thread.First hexagon socket head cap screw 2 and 8 junction of upper plate 1 or lower plate
It is provided with spring shim 3, to connect closer.
When the invention works, the lower plate 8 of vibration-isolating platform connects vibration source, is connected when vibration source is ground by four through-holes 22
It connects, is attached when vibration source is mechanical by cross recess 21.The vibration of vibration source successively passes through lower plate 8, in spring shim 3, first
Hex bolts 2 is transmitted to wedge block 4, then is transmitted to inside quasi- zero stiffness unit 7 by Hooks coupling universal coupling 5, connecting shaft 6.In standard zero
In rigidity unit, vibration is successively transmitted to connecting shaft 6 after chassis lid 18, mechanical spring 19, axis chassis 17, axis 9, via ten thousand
It is transmitted to shaft coupling 5, wedge block 4, the first hexagon socket head cap screw 2 and the spring shim 3 being set on the first hexagon socket head cap screw 2
Plate.(such as figure "+" "-" number indicates power supply after being passed through the electric current of assigned direction due to the electromagnetic coil 16 inside quasi- zero stiffness unit
Positive and negative anodes), generate electromagnetic field, with annular permanent magnet 15 act on, formed negative stiffness effects.It, can by the big minor adjustment of electric current
So that the overall stiffness after electromagnetic type negative stiffness is in parallel with mechanical spring 19 goes to zero, the standard with good anti-vibration performance is formed
Zero stiffness characteristic.By the same Pyramid of multiple vibration isolation units composition, using four groups of pyramids as the four of vibration-isolating platform
A angle, by the coupling effect between quasi- zero stiffness unit, vibration isolation while can be very good to realize good multiple directions.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (8)
1. a kind of adjustable vibration-isolating platform of pyramid, it is characterised in that：Including upper plate and lower plate, the upper plate and lower plate it
Between be symmetrically connected with the quasi- zero location structure of multiple groups, every group of quasi- zero location structure includes three quasi- zero stiffness units, and described quasi- zero just
Degree unit both ends pass through Hooks coupling universal coupling respectively and connect with the upper plate and lower plate；Described in three in every group of quasi- zero location structure
The tie point of quasi- zero stiffness unit and the upper plate be formed by the diameter of a circle quasi- zero stiffness unit described less than three with it is described
The tie point of lower plate is formed by diameter of a circle；The upper plate center offers cross recess, and the upper plate surrounding offers symmetrically
Through-hole, the lower plate is identical with the upper plate structure.
2. the adjustable vibration-isolating platform of pyramid according to claim 1, it is characterised in that：The quasi- zero stiffness unit
On connecting shaft is installed, the connecting shaft is fixedly connected with described Hooks coupling universal coupling one end, solid respectively on the upper plate and lower plate
Dingan County is equipped with wedge block, and the wedge block lower end is provided with prominent cylinder, and the Hooks coupling universal coupling other end passes through prominent cylinder
It is fixedly connected with the wedge block.
3. the adjustable vibration-isolating platform of pyramid according to claim 2, it is characterised in that：The quasi- zero stiffness unit
Including square tube；The square tube upper end is connected with cover, and lower end is connected with chassis lid；Axis is fixedly installed in the square tube, it is described
It is wound with electromagnetic coil on axis, is provided with annular permanent magnet on the outside of the electromagnetic coil；The chassis lid top passes through mechanical elastic
Spring is connected with axis chassis, and the axis chassis is fixedly connected by bolt with the bottom of the axis.
4. the adjustable vibration-isolating platform of pyramid according to claim 3, it is characterised in that：The axis top is arranged with
Neck bush is arranged with external bushing on the neck bush, is provided with the edge of a wing at the top of the neck bush and the external bushing；It is described outer
The edge of a wing of bushing is located on the cover, and passes through interior hexagonal spiral shell between the edge of a wing of the external bushing and the edge of a wing of the neck bush
Bolt is fixedly connected.
5. the adjustable vibration-isolating platform of pyramid according to claim 3, it is characterised in that：It is provided among the axis
Annular flange, the electromagnetic coil are wound on the axis below the annular flange.
6. the adjustable vibration-isolating platform of pyramid according to claim 4, it is characterised in that：The neck bush with it is described
The outer diameter of shaft connection place is gradually reduced；The outer lining set upper side is sheathed on the neck bush, and lower end is sheathed on the axis
On.
7. the adjustable vibration-isolating platform of pyramid according to claim 5, it is characterised in that：The annular permanent magnet with
The square tube inner wall is in close contact, and the annular permanent magnet bottom is set to the square tube bottom, the annular permanent magnet top
Portion is set to the cover bottom.
8. the adjustable vibration-isolating platform of pyramid according to claim 5, it is characterised in that：The one end of the connecting shaft is set
It is equipped with screw thread, threaded hole is offered at the top of the axis, the end of thread of the connecting shaft and the threaded hole of the axis pass through screw thread
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101223.1A CN108869626A (en) | 2018-09-20 | 2018-09-20 | A kind of adjustable vibration-isolating platform of pyramid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101223.1A CN108869626A (en) | 2018-09-20 | 2018-09-20 | A kind of adjustable vibration-isolating platform of pyramid |
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| Publication Number | Publication Date |
|---|---|
| CN108869626A true CN108869626A (en) | 2018-11-23 |
Family
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| CN201811101223.1A Pending CN108869626A (en) | 2018-09-20 | 2018-09-20 | A kind of adjustable vibration-isolating platform of pyramid |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811402A (en) * | 2020-07-06 | 2020-10-23 | 重庆大学 | Six-degree-of-freedom absolute pose measuring device based on quasi-zero rigidity |
| CN111828524A (en) * | 2020-07-23 | 2020-10-27 | 中国核动力研究设计院 | Novel electromagnetic negative stiffness vibration isolator with high radial stability |
| CN112377561A (en) * | 2020-10-30 | 2021-02-19 | 哈尔滨工业大学 | Three-degree-of-freedom micro-vibration isolation device based on active electromagnetic negative stiffness structure |
| CN112943848A (en) * | 2021-01-29 | 2021-06-11 | 重庆大学 | Horizontal arrangement six-degree-of-freedom constant-rigidity mechanism |
| CN113685488A (en) * | 2021-09-13 | 2021-11-23 | 湖南工学院 | Electromagnetic shock absorber capable of achieving multi-direction shock absorption |
| US20230045158A1 (en) * | 2021-08-04 | 2023-02-09 | Chongqing University | Magnetic Suspension Type Sensing System For Space Full-Degree-Of-Freedom Absolute Poses |
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| CN104373503A (en) * | 2014-10-28 | 2015-02-25 | 上海卫星工程研究所 | Micro-vibration convergence type vibration isolation device used for satellite flywheel |
| CN104455181A (en) * | 2014-10-27 | 2015-03-25 | 西安交通大学 | Quasi-zero stiffness vibration isolator with annular permanent magnets used for generating negative stiffness |
| CN105485230A (en) * | 2016-01-13 | 2016-04-13 | 哈尔滨工程大学 | Electromagnetic semi-active vibration isolator achieving quasi-zero rigidity characteristic through asymmetric magnetic tooth structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811402A (en) * | 2020-07-06 | 2020-10-23 | 重庆大学 | Six-degree-of-freedom absolute pose measuring device based on quasi-zero rigidity |
| CN111828524A (en) * | 2020-07-23 | 2020-10-27 | 中国核动力研究设计院 | Novel electromagnetic negative stiffness vibration isolator with high radial stability |
| CN112377561A (en) * | 2020-10-30 | 2021-02-19 | 哈尔滨工业大学 | Three-degree-of-freedom micro-vibration isolation device based on active electromagnetic negative stiffness structure |
| CN112943848A (en) * | 2021-01-29 | 2021-06-11 | 重庆大学 | Horizontal arrangement six-degree-of-freedom constant-rigidity mechanism |
| US20230045158A1 (en) * | 2021-08-04 | 2023-02-09 | Chongqing University | Magnetic Suspension Type Sensing System For Space Full-Degree-Of-Freedom Absolute Poses |
| US11692607B2 (en) * | 2021-08-04 | 2023-07-04 | Chongqing University | Magnetic suspension type sensing system for space full-degree-of-freedom absolute poses |
| CN113685488A (en) * | 2021-09-13 | 2021-11-23 | 湖南工学院 | Electromagnetic shock absorber capable of achieving multi-direction shock absorption |
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Application publication date: 20181123 |