CN105605091B - A kind of big damping flexible hinge of U-shaped structure - Google Patents
A kind of big damping flexible hinge of U-shaped structure Download PDFInfo
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- CN105605091B CN105605091B CN201610182539.2A CN201610182539A CN105605091B CN 105605091 B CN105605091 B CN 105605091B CN 201610182539 A CN201610182539 A CN 201610182539A CN 105605091 B CN105605091 B CN 105605091B
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- damping
- shaped structure
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/12—Pivotal connections incorporating flexible connections, e.g. leaf springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a kind of big damping flexible hinges of U-shaped structure, including first axle connecting pin, the second hinge connecting pin for connecting compliant mechanism, it further include the U-shaped structure being connected between the first axle connecting pin and second hinge connecting pin, several plate constraint material layers have from top to bottom been set in parallel on the opposite two sides inner wall of the U-shaped structure, one end of adjacent constraint material layer is individually fixed on not ipsilateral inner wall, the other end is free end, and viscoelastic damping material is filled between adjacent constraint material layer.The flexible hinge model of the present invention, under the requirement such as rigidity, rotational angle for meeting hinge, additional visco-elastic damping material can be passed through, using restrictive damping layer design pattern, make full use of the shear energy dissipation effect of damping layer material, increase the structural damping of flexible hinge, realizes the passive effectiveness in vibration suppression of compliant mechanism.
Description
Technical field
The present invention relates to it is a kind of by power input be converted into displacement input have the function of restore and have larger structure damp
Big flexibility turning joint, be mainly used in the instrument and meters such as precision drive and precision positioning.
Background technique
Flexible hinge refers under the action of external force or torque, using the flexible deformation of material between adjacent rigid bar
A kind of kinematic pair structure type of relative motion is generated, the structure of this and conventional rigid kinematic pair is very different.Compared to biography
The rigid hinge (mechanism) of system, flexible hinge and compliant mechanism have many advantages: (1) can integrated design and processing, therefore can
To simplify structure, reduce volume and weight, from assembly；(2) gapless and friction are, it can be achieved that high-precision motion；(3) from mill
Damage improves the service life；(4) it from lubrication, avoids pollution；(5) rigidity of structure can be increased.
Exactly because the structural damping of flexible hinge is very low, it might even be possible to ignore not however, the features such as gapless is without friction
Meter, this makes the vibratory response generated during mechanism driving be unable to get inhibition.In micro-nano or even micro-nano high-precision
Under positioning requirements, mechanism stress vibrate meeting so that micro- locating effect is affected.Therefore, in order to overcome this weakness, this
Invention proposes that a kind of big damping flexible hinge model passes through additional viscoelastic under the requirement such as rigidity, rotational angle for meeting hinge
Property damping material makes full use of the shear energy dissipation effect of damping layer material using restrictive damping layer design pattern, to increase flexibility
Passive effectiveness in vibration suppression is realized in the structural damping of hinge.
Summary of the invention
In order to overcome existing hinge arrangement damping small, it is also easy to produce vibration, influences the weakness of positioning accuracy, the present invention proposes one
The big damping flexible hinge model of kind passes through additional viscoelastic damping material under the requirement such as rigidity, rotational angle for meeting hinge
Material, using restrictive damping layer design pattern, makes full use of the shear energy dissipation effect of damping layer material, to increase the knot of flexible hinge
Structure damping, realizes passive effectiveness in vibration suppression.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of big damping flexible hinge of U-shaped structure, including the first axle connecting pin for connecting compliant mechanism, the second hinge
Chain link end further includes the U-shaped structure being connected between the first axle connecting pin and second hinge connecting pin, described U-shaped
From top to bottom it has been set in parallel several plate constraint material layers on the opposite two sides inner wall of structure, the one of adjacent constraint material layer
End is individually fixed on not ipsilateral inner wall, and the other end is free end, is hindered between adjacent constraint material layer filled with viscoplasticity
Damping material layer.
Further, it is from top to bottom provided with to relative misalignment on the two sides inner wall of the U-shaped structure several for embedding
Enter to install the jaw of constraint material layer.
Further, the jaw is an integral structure with U-shaped structure.
Further, the material of the constraint material layer is aluminum alloy flake.
Further, the material of the viscoelastic damping material is butyl rubber.
Compared with prior art, the beneficial effects of the present invention are:
(1) can obtain has certain structural damping, makes have vibration damping shock resistance using the compliant mechanism itself of the hinge；
(2) the structural damping value size of institute's invention flexible hinge can be obtained by changing structural parameters, particular by changing
Become sticky elastic damping material layer number and thickness degree, correspondingly adjust constraint material layer number.
Detailed description of the invention
Fig. 1 is the U-shaped big damping flexible hinge schematic front view of the embodiment of the present invention 1.
Fig. 2 is the U-shaped big damping flexible hinge stereoscopic schematic diagram of the embodiment of the present invention 1.
Fig. 3 is the U-shaped big damping flexible hinge schematic front view of the embodiment of the present invention 2.
Fig. 4 is the U-shaped big damping flexible hinge stereoscopic schematic diagram of the embodiment of the present invention 2.
As shown in the figure are as follows: 1. first axle connecting pins, 2. viscoelastic damping materials, 3. constraint material layers, 4 second hinges
Connecting pin, 5. jaws, 6.U type structure.
Specific embodiment
The object of the invention will be described in further detail in the following with reference to the drawings and specific embodiments, and embodiment is not
It can repeat one by one herein, but therefore embodiments of the present invention are not limited to the following examples.
Embodiment 1
As shown in Figures 1 and 2, the big damping flexible hinge of a kind of U-shaped structure, including the first hinge for connecting compliant mechanism
Chain link end 1, second hinge connecting pin 4, further include be connected to the first axle connecting pin 1 and second hinge connecting pin 4 it
Between U-shaped structure 6, constitute flexible hinge overall model, plate constraint material layer 3 is from top to bottom set in parallel the U-shaped knot
On the opposite two sides inner wall of structure 6, at this point, one end of adjacent constraint material layer 3 is individually fixed on not ipsilateral inner wall, the other end
For free end, be from top to bottom arranged to relative misalignment respectively on the inner wall of the arranged on left and right sides of the U-shaped structure 6 there are two and
Three are installed the jaw 5 of constraint material layer 3 for being embedded in, and are equipped with a piece of constraint material 3 on each jaw 5, totally five, adjacent
Constraint material layer 3 between be filled with viscoelastic damping material 2.
The jaw 5, first axle connecting pin 1, second hinge connecting pin 4, U-shaped structure 6 are an integral structure, and ensure that
The characteristics of integrated design and processing of flexible hinge.
In the present embodiment, the material selection aluminum alloy flake of the constraint material layer 3.
In the present embodiment, the material selection butyl rubber of the viscoelastic damping material 2.
Viscoelastic damping material 2, constraint material layer 3 and viscoelastic damping material are filled between every constraint material layer 3
The bed of material 2 is combined together by the adhesion strength of damping material.When flexible hinge is bent by external force, two adjacent agreements that contracts a film or TV play to an actor or actress will be driven
Beam material layer 3 moves in the opposite direction, and therefore, being filled in the viscoelastic damping material 2 between constraint material layer 3 will occur
It squeezes, is shear-deformable, increasing the interior friction of molecule in material, biggish damped coefficient will be shown under certain frequency,
Generate apparent effectiveness in vibration suppression.
The viscoelastic damping material 2 is by adhesion strength and 3 adhesion of constraint material.Every constraint material layer 3
One end is fixed in the jaw 5 of 6 inside of U-shaped structure, and the other end is free end.Five constraint material layers 3 are cross-linked in U-shaped knot
6 inside of structure.First axle connecting pin 1, the second hinge connecting pin 4 of flexible hinge can be used as input/output terminal, depending on being connected
Depending on the real work situation of mechanism.When the input that wherein one end is strong, when generating displacement output, hinge U-shaped structure 6 is opened
Mouthful opening and closing drive constraint material layer 3 to occur relative displacement, the viscoelastic damping material 2 filled between constraint material layer 3 due to
Adhesion strength effect can slide with constraint material layer 3, and material internal generates strong shear effect, produced according to viscoelastic material
The mechanism of damping is given birth to, the vibrational energy generated in compliant mechanism transmission process will be absorbed by the viscoelastic material in hinge
And it is converted into heat and dissipates in air.
Viscoelastic material refers to while having the material of two aspect property of viscous fluid and elastic solid (Hookean body), industrially and I
Daily life in have many substances with viscoelastic material, such as the common industrial materials of rubber, plastics there are also blood,
The biomaterials such as muscle, and the performance of high molecular material viscoelasticity property is the most obvious, such as rubber material and plastic material, this is
It is determined by its unique structure, in general high molecular material is all to form chain by covalent bond by small molecule unit
Molecule, chain molecule wind mutually or are linked together by chemical bond, form the reticular structure of space three-dimensional, high molecular material
Molecular weight is generally all very big, is typical polymer, frequent occurrence, interior molecules unit can also revolve the relative motion between molecule
Turn, under external force, material occurs to stretch, reverse, and after external force is revoked, molecule gradually restores to the original state, and discharges external force institute
The function done, this belongs to the elasticity of high molecular material, but due to the unique reticular structure in high molecular material space, occurs between molecule
Sliding, torsion can not restore completely, permanent deformation occurs for material, here it is the viscosity of high molecular material, and this part
The reason of energy is eventually converted into thermal energy and is dispersed into air, generates damping here it is high molecular material.By means of viscoelastic
Property material generate damping mechanism, the present embodiment use constrained layer damping structure, i.e., in the viscoplasticity being covered on bent member
On Damping material layer 2, one layer of elastomeric layer, i.e. constraint material layer 3, when hinge, which bends, to be rotated, viscoelastic are in addition covered
Property Damping material layer 2 be forced to be obedient to the shape of the structural unit on adjacent both sides so that damping layer generate shear strain, in alternation lotus
Under load effect, bigger dissipation is generated than single free layer impedance bundary of low sheraing load.
The main body of hinge described in the present embodiment includes first axle connecting pin 1, second hinge connecting pin 4, U-shaped structure 6, U
The jaw 5 of 6 inside of type structure, is integrally formed by line cutting technology, ensure that the integrated design and processing of flexible hinge
Feature.
Since the piezoelectric ceramic actuator driving force in compliant mechanism is big, fast response time, once held by signal excitation
Impact easily is generated to submissive locating platform, and the structural damping very little of submissive locating platform, underdamping system once generate impact
Vibration, residual oscillation can last longers.Therefore the present embodiment is mainly used for such compliant mechanism for easily causing high frequency flutter
On the one hand locating platform is used as mechanism cradle head, on the other hand play the role of inhibiting platform flutter.
Embodiment 2
As shown in Figure 3 to Figure 4, the present embodiment the difference from embodiment 1 is that: left and right the two of the U-shaped structure (6)
One and two is from top to bottom provided with to relative misalignment on the inner wall of side respectively for being embedded in the jaw of installation constraint material layer 3
5, a piece of constraint material 3 is equipped on each jaw 5, and three pieces, the present embodiment are mainly used in compliant mechanism high frequency flutter journey altogether
Spend lower, required structural damping is worth in lesser situation.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all of the invention
Made any modifications, equivalent replacements, and improvements etc., should be included in the protection of the claims in the present invention within spirit and principle
Within the scope of.
Claims (5)
1. a kind of big damping flexible hinge of U-shaped structure, including for connecting compliant mechanism first axle connecting pin (1), second
Hinge connecting pin (4), it is characterised in that: further include being connected to the first axle connecting pin (1) and second hinge connecting pin (4)
Between U-shaped structure (6), be from top to bottom set in parallel on the opposite two sides inner wall of the U-shaped structure (6) a number of
One end of the plate constraint material layer (3) of changeable, adjacent constraint material layer (3) is individually fixed on not ipsilateral inner wall, separately
One end is free end, is filled with viscoelastic damping material (2) between adjacent constraint material layer (3), and the flexible hinge is logical
Cross the layer number for changing visco-elastic damping material and thickness degree, the layer number adjustment structural damping value for correspondingly adjusting constraint material
Size, adhesion strength of the constraint material layer (3) with viscoelastic damping material (2) by damping material is combined together, when soft
Property hinge is bent by external force, and adjacent two panels constraint material layer (3) will be driven to move in the opposite direction, make to be filled in about
Extruding, shear-deformable, the interior friction of molecule in increase material occur for the viscoelastic damping material (2) between beam material layer (3).
2. the big damping flexible hinge of a kind of U-shaped structure according to claim 1, it is characterised in that: the U-shaped structure
(6) it is from top to bottom provided with to relative misalignment on two sides inner wall several for being embedded in the jaw (5) of installation constraint material layer 3.
3. the big damping flexible hinge of a kind of U-shaped structure according to claim 2, it is characterised in that: the jaw (5),
One hinge connecting pin (1), second hinge connecting pin (4), U-shaped structure (6) are an integral structure.
4. the big damping flexible hinge of a kind of U-shaped structure according to claim 1, it is characterised in that: the constraint material
The material of layer (3) is aluminum alloy flake.
5. the big damping flexible hinge of a kind of U-shaped structure according to claim 1, it is characterised in that: the viscoelastic damping
The material of material layer (2) is butyl rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610182539.2A CN105605091B (en) | 2016-03-25 | 2016-03-25 | A kind of big damping flexible hinge of U-shaped structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610182539.2A CN105605091B (en) | 2016-03-25 | 2016-03-25 | A kind of big damping flexible hinge of U-shaped structure |
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| CN105605091A CN105605091A (en) | 2016-05-25 |
| CN105605091B true CN105605091B (en) | 2019-04-09 |
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| CN201610182539.2A Active CN105605091B (en) | 2016-03-25 | 2016-03-25 | A kind of big damping flexible hinge of U-shaped structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107401558B (en) * | 2017-08-30 | 2024-01-23 | 华南理工大学 | Notch type compliant hinge with comb-shaped damping structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918401A (en) * | 2004-02-06 | 2007-02-21 | 皇家飞利浦电子股份有限公司 | Elastic interface device |
| CN201246527Y (en) * | 2008-08-26 | 2009-05-27 | 王鹏 | High-pressure vertical tube flexible U-shaped clip |
| CN202418386U (en) * | 2011-12-20 | 2012-09-05 | 中国飞机强度研究所 | Grid type vibration isolator |
| CN205618535U (en) * | 2016-03-25 | 2016-10-05 | 华南理工大学 | Flexible hinge of big damping of U type structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083789C (en) * | 1996-11-19 | 2002-05-01 | 梅特拉维比R·D·S·有限公司 | Automotive, self-locking and damping articulated joint and articulation equipped with same |
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2016
- 2016-03-25 CN CN201610182539.2A patent/CN105605091B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918401A (en) * | 2004-02-06 | 2007-02-21 | 皇家飞利浦电子股份有限公司 | Elastic interface device |
| CN201246527Y (en) * | 2008-08-26 | 2009-05-27 | 王鹏 | High-pressure vertical tube flexible U-shaped clip |
| CN202418386U (en) * | 2011-12-20 | 2012-09-05 | 中国飞机强度研究所 | Grid type vibration isolator |
| CN205618535U (en) * | 2016-03-25 | 2016-10-05 | 华南理工大学 | Flexible hinge of big damping of U type structure |
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| CN105605091A (en) | 2016-05-25 |
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