CN107143613B - A kind of vibration reduction platform with quasi- zero stiffness - Google Patents
A kind of vibration reduction platform with quasi- zero stiffness Download PDFInfo
- Publication number
- CN107143613B CN107143613B CN201710381635.4A CN201710381635A CN107143613B CN 107143613 B CN107143613 B CN 107143613B CN 201710381635 A CN201710381635 A CN 201710381635A CN 107143613 B CN107143613 B CN 107143613B
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- Prior art keywords
- hinge
- damper
- quasi
- platform
- vibration reduction
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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
- F16F15/023—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 fluid means
- F16F15/027—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 fluid means comprising control arrangements
- F16F15/0275—Control of stiffness
-
- 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
- F16F15/04—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 elastic means
Abstract
A kind of vibration reduction platform with quasi- zero stiffness of the present invention, including moving platform, damper, regulating device, connecting rod and pedestal；Pedestal is connect with connecting rod lower part, and connecting rod top is connect by hook hinge with moving platform；The hook hinge other end connects damper head, and damper bottom end horseshoe is connect with regulating device, and regulating device is connect with moving platform；While the present invention has higher support stiffness, also there is lower movement rigidity, good damping result；The initial position of damper can be adjusted, it can be achieved that wide frequency domain vibration damping, has good engineering practicability by regulating device；It is simple in structure, manufacturing cost is low while with good effectiveness in vibration suppression.
Description
Technical field
The invention belongs to mechanical damping device technical fields, specifically, the present invention relates to a kind of multi-dimensional damping platforms.
Background technology
Vibration is a kind of phenomenon of nature generally existing, and vibration can influence the function of precision instrument and equipment, reduces processing
Precision and finish aggravate fatigue and the abrasion of component, and so as to shorten the service life of machine and works, vibration is also possible to draw
The large deformation for playing structure destroys.In mechanism engineering and mechanical engineering field, always all to seek a kind of vibration damping of superior performance flat
Platform.Current published related patents, such as the patent No. 201610545258.9.
Invention content
The object of the present invention is to provide providing a kind of vibration reduction platform with quasi- zero stiffness, the vibration reduction platform be provided simultaneously with compared with
High static rigidity and lower dynamic rate, and can realize that rigidity is adjustable.
A kind of vibration reduction platform with quasi- zero stiffness, including moving platform, damper, regulating device, connecting rod and pedestal；
There are six base hinge holders for pedestal setting, and are provided with equal number of spoke, on connecting rod lower part and pedestal
Base hinge holder connects, and can be rotated with around hinge holder；
The top of connecting rod is connect by hook hinge with moving platform, and lower part is connect with base hinge holder；
The bottom surface of moving platform is equipped with six sliding slots；Every two sliding slot is each parallel, is evenly arranged in moving platform bottom；
The head of damper is rotatablely connected by hook hinge and moving platform, and bottom end horseshoe connects with regulating device rotation
It connects；
The bottom plate of regulating device is connect by hex nut with the sliding slot on moving platform, and can be moved in sliding slot；
Hook hinge includes third hinge holder, the 4th hinge bracket, first axle holder and second hinge holder；Third
Hinge bracket and the 4th hinge bracket are connected by cross connecting piece；Cross connecting piece one end connecting shaft, cross connection
Part can be moved along axis axis direction；Second hinge holder is connect by axis with third hinge support level；First axle holder with
Third hinge support vertical is fixedly connected.
Moving platform is connected with the first axle holder of hook hinge.
The 4th hinge bracket connection on the upper end and hook hinge of connecting rod.
The head of damper and the second hinge holder of hook hinge connect, and the hinge of bottom end horseshoe and regulating device
Holder connects.
Regulating device includes a bottom plate, is fixed with two sliding blocks by hex nut under bottom plate, and both sides are fixed hinged on bottom plate
Chain holder.
The sliding block of regulating device is connect with moving platform sliding slot, and can be moved in sliding slot.
Damper includes head, spring adjusting block, piston rod, shock-absorbing spring, bottom end horseshoe；Head connects piston rod,
Piston rod upper end is equipped with spring adjusting block, periphery package shock-absorbing spring, and bottom end horseshoe is arranged in tail end；Piston rod one end, which is equipped with, lives
Working cylinder is divided into two chambers up and down, rebuilt valve and flowing valve is equipped on piston by plug, piston, and working cylinder bottom is equipped with recuperation valve
And compression valve, working cylinder outside is equipped with oil storage cylinder, working solution is full of entire working cylinder, storage major part working solution in oil storage cylinder.
One kind realizing step by quasi- zero stiffness vibration reduction platform, quasi- zero stiffness：
It is calculated first when moving platform is by extraneous exciting force, shock-absorbing spring when reaching equipoise on damper
Deflection；
When then reaching equipoise according to put object, the deflection of the shock-absorbing spring on damper and damper
Pre compressed magnitude keeps the pretightning force of damper inside；
When moving platform moves downward, the shock-absorbing spring on damper generates positive rigidity；By spring adjusting block adjust with
The deflection of shock-absorbing spring on the opposite damper of a upper damper, adjusts the pre compressed magnitude of the damper, makes the damper
Pretightning force it is outside；Shock-absorbing spring when moving platform moves downward on the damper generates negative stiffness；Two opposite dampers
The positive negative stiffness generated, which is numerically added, can realize that the global stiffness of entire vibration insulating system is zero, to realize quasi- zero stiffness
Vibration reduction platform.
The beneficial effects of the invention are as follows：1. the vibration reduction platform has higher support stiffness, also have lower
Move rigidity, good damping result；
2. the vibration reduction platform can adjust the initial position of damper, it can be achieved that wide frequency domain vibration damping by regulating device,
With good engineering practicability；
It is simple in structure, manufacturing cost is low 3. the vibration reduction platform is while with good effectiveness in vibration suppression.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of quasi- zero stiffness vibration reduction platform of the present invention；
Fig. 2 is schematic diagram of base structure in a kind of quasi- zero stiffness vibration reduction platform of the present invention；
Fig. 3 is hook hinge structural schematic diagram in a kind of quasi- zero stiffness vibration reduction platform of the present invention；
Fig. 4 is damper structure schematic diagram in a kind of quasi- zero stiffness vibration reduction platform of the present invention；
Fig. 5 is the internal structure schematic diagram of damper in a kind of quasi- zero stiffness vibration reduction platform of the present invention；
Fig. 6 is regulating device structural schematic diagram in a kind of quasi- zero stiffness vibration reduction platform of the present invention；
Fig. 7 is moving platform structural schematic diagram in a kind of quasi- zero stiffness vibration reduction platform of the present invention.
Specific implementation mode
For technology contents, construction feature, institute's reached purpose and effect that the present invention will be described in detail, below in conjunction with embodiment
And attached drawing is coordinated to be described in detail.
Refering to fig. 1 to Fig. 7, a kind of quasi- zero stiffness vibration reduction platform of the present invention, including moving platform 6, damper 4, regulating device
5, connecting rod 2 and pedestal 1；
There are six base hinge holders 11 for the setting of pedestal 1, and are provided with equal number of spoke 12,2 lower part of connecting rod and bottom
Seat hinge bracket 11 connects, and can be rotated with around hinge holder；Top is connect by hook hinge 3 with moving platform 6；
The bottom surface of moving platform 6 is equipped with six sliding slots 61；Every two sliding slot 61 is each parallel；
The head of damper 4 is rotatablely connected by hook hinge 3 and moving platform 6,5 turns of bottom end horseshoe and regulating device
Dynamic connection；
The bottom plate 51 of regulating device 5 is connect by hex nut with the sliding slot 61 on moving platform 6, and can be moved in sliding slot
It is dynamic；
Hook hinge 3 includes third hinge holder 31, the 4th hinge bracket 36, first axle holder 33 and second hinge branch
Frame 34；Third hinge holder 31 and the 4th hinge bracket 36 are connected by cross connecting piece 32；32 one end of cross connecting piece
Connecting shaft 35, cross connecting piece 32 can be moved along axis axis direction；Second hinge holder 34 passes through axis 35 and third hinge branch
31 horizontal connection of frame；First axle holder 33 is vertical with third hinge holder 31 to be fixedly connected；The of moving platform 6 and hook hinge
One hinge bracket 33 is connected；
The upper end of connecting rod 2 is connect with the 4th hinge bracket 36 in hook hinge 3.
The head 41 of damper 4 is connect with the second hinge holder 34 of hook hinge 3, and bottom end horseshoe 45 is filled with adjusting
Set 5 connection of hinge bracket 54.
Regulating device 5 includes a bottom plate 51, and bottom plate 51 times is fixed with two parallel sliding blocks 52 by hex nut, on bottom plate 51
Both sides are fixed with hinge bracket 54.
The sliding block 52 of regulating device 5 is connect with moving platform sliding slot 61, and can be moved in sliding slot 61.
Damper 4 includes head 41, piston rod 42, spring adjusting block 43, shock-absorbing spring 44, bottom end horseshoe 45；Head
41 connection piston rods 42,42 upper end of piston rod are equipped with spring adjusting block 43, periphery package shock-absorbing spring 44, and bottom end horse is arranged in tail end
Shoes 45；42 one end of piston rod is equipped with piston 47, and working cylinder is divided into two chambers up and down, rebuilt valve is equipped on piston by piston 47
46 and flowing valve 412, working cylinder bottom is equipped with recuperation valve 48 and compression valve 49, and oil storage cylinder 410, working solution are equipped on the outside of working cylinder
Full of entire working cylinder 411, the most of working solution of storage in oil storage cylinder 410.
When moving platform 6 moves downward, connecting rod 2 rotates outward, and drives the 4th hinge bracket 36 to move out, the 4th hinge
Holder 36 drives cross connecting piece 32 to move out, and cross connecting piece 32 is moved out with moving axis 35, and second on axis 35
Hinge bracket 34 drives 42 extensional motion of piston rod, piston rod 42 to be stretched with piston 47, causes the volume of epicoele to reduce, cavity of resorption
Volume increase, the operating pressure of epicoele is higher than cavity of resorption, and flowing valve 412 is closed, and rebuilt valve 46 is opened, and working solution passes through rebuilt valve
It is flowed to cavity of resorption after 46 throttlings, to generate enhanced stretch resistance, reduces vibration.Since piston rod 42 occupies a part of body of epicoele
Product, causes the amount that epicoele volume reduces to be less than the increased amount of volume of cavity of resorption, and the working solution of epicoele is not enough to after being flowed to cavity of resorption
Full of cavity of resorption, cavity of resorption generates negative pressure, and the pressure of cavity of resorption is less than the pressure of oil storage cylinder, and compression valve 49 is closed, and recuperation valve 48 is opened, storage
The working solution of oil cylinder 410 keeps the working solution in working cylinder 411 continuous to 411 cavity of resorption compensation work liquid of working cylinder.
When moving platform 6 moves upwards, connecting rod 2 rotates inward, and drives the 4th inwardly movement of hinge bracket 36, the 4th hinge
Holder 36 drives cross connecting piece 32 inwardly to move, and cross connecting piece 32 is inwardly moved with moving axis 35, and second on axis 35
Hinge bracket 34 drives 42 compression movement of piston rod, piston rod 42 to be compressed with piston 47, causes the volume of epicoele to increase, cavity of resorption
Volume reduce, rebuilt valve 46 is closed, and flowing valve 412 is opened, and the working solution of cavity of resorption is flowed by flowing valve 412 to epicoele, is filled
Full epicoele.Since piston rod 42 occupies a part of volume of epicoele, the volume that the increased amount of epicoele volume is less than cavity of resorption is caused to reduce
Amount, the working solution of cavity of resorption makes recuperation valve 48 close to epicoele flowing full of a part of working solution is had more after epicoele, compression valve 49
It opens to 410 flow restriction of oil storage cylinder and generates resistance to compression pression, reduce vibration.
One kind realizing step by quasi- zero stiffness vibration reduction platform, quasi- zero stiffness：
It is calculated first when moving platform 6 is by extraneous exciting force, shock-absorbing spring when reaching equipoise on damper 4
44 deflection；
When then reaching equipoise according to put object, the deflection and vibration damping of the shock-absorbing spring 44 on damper 4
The pre compressed magnitude of device keeps the pretightning force of damper inside；
When moving platform moves downward, 4 shock-absorbing spring 44 generates positive rigidity on damper；It is adjusted by spring adjusting block 43
The deflection of shock-absorbing spring on the section damper opposite with a upper damper, adjusts the pre compressed magnitude of the damper 4, makes this
The pretightning force of damper 4 is outside；Shock-absorbing spring 44 when moving platform moves downward on the damper 4 generates negative stiffness；Two-phase
To the positive negative stiffness that generates of damper is numerically added and can realize that the global stiffness of entire vibration insulating system is zero, to reality
Existing quasi- zero stiffness vibration reduction platform.
Claims (9)
1. a kind of vibration reduction platform with quasi- zero stiffness, it is characterised in that including moving platform, damper, regulating device, connecting rod and
Pedestal；
The pedestal, there are six base hinge holders for setting, and are provided with equal number of spoke, the connecting rod lower part and pedestal
Hinge bracket connects, and can be rotated with around hinge holder；
The connecting rod, top are connect by hook hinge with the moving platform, and lower part is connect with base hinge holder；
The moving platform, bottom surface are equipped with six sliding slots；Every two sliding slot is each parallel, is evenly arranged in moving platform bottom；
The damper, head are rotatablely connected by hook hinge and the moving platform, bottom end horseshoe and regulating device
Rotation connection；
The regulating device, bottom plate is connect by hex nut with the sliding slot on the moving platform, and can be moved in sliding slot.
2. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the hook hinge
Including third hinge holder, the 4th hinge bracket, first axle holder and second hinge holder；Third hinge holder and the 4th hinge
Chain holder is connected by cross connecting piece；Cross connecting piece one end connecting shaft, cross connecting piece can be along axis axis directions
It is mobile；Second hinge holder is connect by axis with third hinge support level；First axle holder and third hinge support vertical
It is fixedly connected.
3. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the moving platform and institute
The first axle holder for stating hook hinge is connected.
4. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the upper end of the connecting rod
It is connect with the 4th hinge bracket in the hook hinge.
5. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the regulating device,
Including bottom plate, two sliding blocks are fixed with by hex nut under bottom plate, both sides are fixed with hinge bracket on bottom plate.
6. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the head of the damper
Portion is connect with the second hinge holder of the hook hinge, and bottom end horseshoe is connect with the hinge bracket of the regulating device.
7. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the regulating device
Sliding block is connect with the moving platform sliding slot, and can be moved in sliding slot.
8. a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, it is characterised in that the damper includes
Head, piston rod, spring adjusting block, shock-absorbing spring, bottom end horseshoe；Head connects piston rod, and piston rod upper end is equipped with spring
Bottom end horseshoe is arranged in adjusting block, periphery package shock-absorbing spring, tail end；Piston rod one end is equipped with piston, and piston divides working cylinder
For upper and lower two chambers, rebuilt valve and flowing valve be installed on piston, working cylinder bottom is equipped with recuperation valve and compression valve, outside working cylinder
Side is equipped with oil storage cylinder, working solution is full of entire working cylinder, the most of working solution of storage in oil storage cylinder.
9. the quasi- zero stiffness of a kind of vibration reduction platform with quasi- zero stiffness according to claim 1, vibration reduction platform realizes step
Suddenly：
It is calculated first when moving platform is by extraneous exciting force, the deformation of shock-absorbing spring when reaching equipoise on damper
Amount；
When then reaching equipoise according to put object, the precompressed of the deflection and damper of the shock-absorbing spring on damper
Contracting amount keeps the pretightning force of damper inside；
When moving platform moves downward, the shock-absorbing spring on damper generates positive rigidity；It adjusts and a upper damper is opposite subtracts
The deflection of the shock-absorbing spring to shake on device adjusts the pre compressed magnitude of the damper, keeps the pretightning force of the damper outside；When dynamic flat
Shock-absorbing spring when platform moves downward on the damper generates negative stiffness；The positive negative stiffness that two opposite dampers generate is in numerical value
Upper addition can realize that the global stiffness of entire vibration insulating system is zero, to realize quasi- zero stiffness vibration reduction platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710381635.4A CN107143613B (en) | 2017-05-18 | 2017-05-18 | A kind of vibration reduction platform with quasi- zero stiffness |
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| CN201710381635.4A CN107143613B (en) | 2017-05-18 | 2017-05-18 | A kind of vibration reduction platform with quasi- zero stiffness |
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| CN107143613A CN107143613A (en) | 2017-09-08 |
| CN107143613B true CN107143613B (en) | 2018-11-09 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108386471B (en) * | 2018-03-07 | 2019-08-30 | 哈尔滨工业大学（深圳） | Single-degree-of-freedom horizontal quasi zero stiffness vibration isolating mechanism |
| CN112253681B (en) * | 2020-09-22 | 2022-03-29 | 江苏科技大学 | Tension-compression type energy-absorbing buffering device |
| CN112576689B (en) * | 2020-12-04 | 2021-08-13 | 哈尔滨工程大学 | Low-frequency heavy-load quasi-zero stiffness vibration isolation device |
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| CN105937572A (en) * | 2016-07-12 | 2016-09-14 | 安徽工程大学 | Vibration isolation platform with quasi-zero stiffness |
| CN205806823U (en) * | 2016-07-12 | 2016-12-14 | 安徽工程大学 | Quasi-zero stiffness vibration-isolating platform |
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- 2017-05-18 CN CN201710381635.4A patent/CN107143613B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| EP1501065A1 (en) * | 2003-07-22 | 2005-01-26 | William Lai | Parallel kinematic hexapodal dynamic simulator |
| CN103846908A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Four-branch-chain three-platform one-rotor high-speed parallel connection mechanical hand |
| CN104214484A (en) * | 2014-08-01 | 2014-12-17 | 安徽工程大学 | Six-degree-of-freedom parallel mechanism vibration attenuation platform |
| CN205190633U (en) * | 2015-09-25 | 2016-04-27 | 南京航空航天大学 | Passive damping device of unmanned helicopter airborne equipment of 6 -degree of freedom |
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