CN207213035U - A kind of two level vibration isolator based on piece spring structure - Google Patents
A kind of two level vibration isolator based on piece spring structure Download PDFInfo
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- CN207213035U CN207213035U CN201721246081.9U CN201721246081U CN207213035U CN 207213035 U CN207213035 U CN 207213035U CN 201721246081 U CN201721246081 U CN 201721246081U CN 207213035 U CN207213035 U CN 207213035U
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Abstract
The utility model discloses a kind of two level vibration isolator based on piece spring structure, it is related to absolute gravity measurement technical field.This vibration isolator includes feedback circuit；It is provided with disk on outrigger, outer adjusting screw, capacitance displacement sensor, outer leaf spring, disk, internal frame pole, reflecting prism base, reflecting prism, outer base, interior base, levelling bolt, interior leaf spring and magnetic cylinder coil, outrigger pole, interior adjusting screw on internal frame；The core of whole vibration isolator includes the two level piece spring structure being made up of interior leaf spring and outer leaf spring, and interior leaf spring and outer leaf spring are that 3 uniform leaf spring hangs are formed, and two level elastic construction is provided by the coupling of two level piece spring structure；Mass of the interior leaf spring as outer leaf spring, so, outer leaf spring framework make interior leaf spring in the presence of inertia, have certain vibration isolating effect because effect of inertia and ground keep geo-stationary.The utility model is simple in construction, easy to operate；Applied to falling bodies mechanism, good technical support is provided for the development of high-precision absolute gravimeter.
Description
Technical field
It the utility model is related to absolute gravity measurement technical field, more particularly to a kind of two level vibration isolation based on piece spring structure
Device.
Background technology
The development of the technology such as precision measurement and assembling, precision instrumentation, microfabrication and Ultra-precision Turning, to environment
Isolating technique proposes higher and higher requirement.Ultraprecise Electronic Speculum class optical instrument must have very excellent isolation mounting, this
A little instrument and equipments are usually required that on the basis of special design.Nonetheless, on the Soft Soil of the south of the lower reaches of the Yangtze River, Huo Zhe
On the floor of building, because the flexibility of brace foundation causes the isolating technique environment of these Electronic Speculum class precision optical instruments still
It is undesirable.It can isolate so this quasi-instrument also requires to be placed on the vibration-isolating platform of micro-vibration, these high-precision vibration-isolating platforms
Do not require nothing more than isolation macroscopic vibrations as caused by walking about etc. machine run, vehicle traveling and personnel, but also require to completely cut off due to
Delicate variations caused by the factor such as earth rotation and air conditioning air flow.Therefore carrying out the research to precision instrument vibration isolation technique has
Very important theory significance and practical value.
Existing FG5 vibrating isolation system is that external frame hangs internal stent by 3 support leaf springs, and internal stent passes through
A piece main leaf spring suspension is by vibration isolation object.One glass marble, the central frame in glass marble both sides are had by the bottom of vibration isolation object
It is upper that light emitting diode and two photodiodes and detection circuit and feedback circuit are housed, voice coil motor is housed at the top of support
Coiler part, on corresponding magnet segment framework mounted externally.But this structure is higher to the characteristic requirements of spring, and it is solid
There is the cycle shorter.
Utility model content
The purpose of this utility model, which is that, overcomes shortcoming and defect existing for prior art, there is provided one kind is based on leaf spring knot
The two level vibration isolator of structure.
What the purpose of this utility model was realized in：
The core of whole vibration isolator includes the two level piece spring structure being made up of interior leaf spring and outer leaf spring, interior leaf spring and outer
Leaf spring is that 3 uniform leaf spring hangs are formed, and two level elastic construction is provided by the coupling of two level piece spring structure；It is interior
Mass of the leaf spring as outer leaf spring, so, outer leaf spring framework make interior leaf spring because effect of inertia and ground keep geo-stationary
In the presence of inertia, there is certain vibration isolating effect；Interior leaf spring is needed by the reflecting prism of vibration isolation by 3 leaf spring suspensions,
It is displacement of the reflecting prism relative to interior leaf spring framework to be detected by capacitance displacement sensor by vibration isolation object；By the relative of detection
It is displaced through feedback circuit and is converted to electric current and be input to magnetic cylinder coil, the interior base displacement under outer leaf spring is followed vibration isolation object i.e.
The relative displacement of reflecting prism and interior leaf spring framework and change, so as to allow whole device to be equivalent to overlength leaf spring, reach vibration isolation effect
Fruit.
Specifically, this vibration isolator includes feedback circuit；
It is provided with disk on outrigger, outer adjusting screw, capacitance displacement sensor, outer leaf spring, disk on internal frame, internal frame pole, anti-
Penetrate prism base, reflecting prism, outer base, interior base, levelling bolt, interior leaf spring and magnetic cylinder coil, outrigger pole and interior adjustable
Screw rod；
Its position and annexation are：
Disk is fixed into overall frame outside one by the threaded connection at 3 uniform outrigger pole both ends in outer base and outrigger
Frame；
3 levelling bolts are evenly equipped with the bottom surface of outer base, make whole vibration isolator and ground by adjusting 3 levelling bolts
Keep level；
Interior base is hung by being distributed on outrigger 3 outer leaf springs immediately below disk；
Disk is fixed into an interior general frame by the threaded connection at 3 internal frame pole both ends in interior base and internal frame；
Reflecting prism base is hung by being distributed on internal frame 3 interior leaf springs immediately below disk；
Reflecting prism is fixed on the surface of reflecting prism base；
Capacitance displacement sensor is provided between reflecting prism base and reflecting prism, between interior base and outer base
Magnetic cylinder coil is provided with, capacitance displacement sensor, feedback circuit and magnetic cylinder coil are sequentially connected；
3 outer adjusting screws on the upper end of 3 outer leaf springs and outrigger on disk connect respectively, the upper end of 3 interior leaf springs with
3 interior adjusting screws on internal frame on disk connect respectively；
Ensure that each part is protected in device by adjusting 3 levelling bolts, 3 outer adjusting screws and 3 interior adjusting screws
Water holding is put down.
Compared with prior art, the utility model has following advantages and good effect：
1. substituted for helical spring with leaf spring forms two level elastic construction, whole vibration isolator is set to have more by feedback circuit
Preferable vibration isolating effect；
2. it is simple in construction, it is easy to operate,
3. being applied to falling bodies mechanism, good technical support is provided for the development of high-precision absolute gravimeter.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of disk 1 on outrigger；
Fig. 3 is the utility model embodiment configuration diagram.
In figure：
A-support；
B-falling bodies mechanism；
C-vibration isolator；
0-feedback circuit；
Disk on 1-outrigger；
2-outer adjusting screw,
3-capacitance displacement sensor；
4-outer leaf spring；
Disk on 5-internal frame；
6-internal frame pole；
7-reflecting prism base；
8-reflecting prism；
9-outer base；
10-interior base；
11-levelling bolt；
12-interior leaf spring；
13-magnetic cylinder coil；
14-outrigger pole；
15-interior adjusting screw.
Embodiment
Describe in detail with reference to the accompanying drawings and examples：
First, it is overall
Such as Fig. 1, this vibration isolator includes feedback circuit 0；
It is provided with disk 1 on outrigger, outer adjusting screw 2, capacitance displacement sensor 3, outer leaf spring 4, disk 5, internal frame branch on internal frame
Bar 6, reflecting prism base 7, reflecting prism 8, outer base 9, interior base 10, levelling bolt 11, interior leaf spring 12 and magnetic cylinder coil 13,
Outrigger pole 14 and interior adjusting screw 15；
Its position and annexation are：
Disk 1 is fixed into overall outside one by the threaded connection at 3 uniform both ends of outrigger pole 14 in outer base 9 and outrigger
Framework；
3 levelling bolts 11 are evenly equipped with the bottom surface of outer base 9, make whole vibration isolator by adjusting 3 levelling bolts 11
With ground keep level；
Interior base 10 is hung by being distributed on 3 outer leaf springs 4 on outrigger immediately below disk 1；
Disk 5 is fixed into an interior general frame by the threaded connection at 3 both ends of internal frame pole 6 in interior base 10 and internal frame；
Reflecting prism base 7 is hung by being distributed on 3 interior leaf springs 12 on internal frame immediately below disk 5；
Reflecting prism 8 is fixed on the surface of reflecting prism base 7；
Capacitance displacement sensor 3 is provided between reflecting prism base 7 and reflecting prism 8, in interior base 10 and outer bottom
Magnetic cylinder coil 13 is provided between seat 9, capacitance displacement sensor 3, feedback circuit 0 and magnetic cylinder coil 13 are sequentially connected；
3 outer adjusting screws 2 on the upper end of 3 outer leaf springs 4 and outrigger on disk 1 connect respectively, 3 interior leaf springs 12 it is upper
End is connected respectively with 3 interior adjusting screws 15 on disk on internal frame 5；
Ensure each part in device by adjusting 3 levelling bolts, 11,3 outer adjusting screws 2 and 3 interior adjusting screws 15
Equal keep level.
2nd, functional part
00) feedback circuit 0
Feedback circuit 0 is a kind of general negative-feedback circuit.
Its function is that displacement signal is converted into electric signal.
01) disk 1 on outrigger
Such as Fig. 2, disk 1 is a kind of disk on outrigger；
Round tube hole 1-0 is provided among it, for the printing opacity of reflecting prism 8；
Its lower surface is evenly equipped with the 1st, 2,3,4,5,6 minor thread through hole 1-1,1-2,1-3,1-4,1-5,1-6；
The top of 1st, 3,5 minor thread hole 1-1,1-3,1-5 and outrigger pole 14 connects；
2nd, 4,6 minor thread hole 1-2,1-4,1-6 are connected with outer adjusting screw 2.
02) outer adjusting screw 2
Outer adjusting screw 2 is a kind of threaded rod, and outer adjusting screw 2 passes through nut check, outer adjusting screw with disk 1 on outrigger
2 lower ends connect outer leaf spring 4.
The function of outer adjusting screw 2 is：Leveling interior base 10.
03) capacitance displacement sensor 3
Such as Fig. 1,3, capacitance displacement sensor 3 is a kind of electronic device of general measurement micro-displacement.
The working mechanism of capacitance displacement sensor 3 is：
The relatively slight displacement of reflecting prism base 7 and interior base 10 is output in feedback circuit 0.
04) outer leaf spring 4
Outer leaf spring 4 includes being distributed on the leaf spring of 3 semicirculars in shape of the lower section of disk 1 on outrigger.
Its position and annexation are：
The upper end of outer leaf spring 4 is connected with outer adjusting screw 2, the lower end suspension interior base 10 of outer leaf spring 4.
Its function is to make to form elastic construction between disk 1 on interior base 10 and outrigger.
Its working mechanism is：
Outer leaf spring 4 ensures that lower end suspension interior base 10 keeps stable and horizontal, while by choosing suitable leaf spring length
And elastic performance, it can largely improve natural period and the stability of leaf spring.
05) disk 5 on internal frame
Its 26S Proteasome Structure and Function of disk 5 is similar to disk on outrigger 1 on internal frame；
Specifically, disk 5 is a kind of disk on internal frame, and centre is provided with 50cm through hole.
Its position and annexation are：
Disk 5 is connected with the upper end of internal frame pole 6 on internal frame, 5 uniform 3 interior adjusting screws 15 of disk on internal frame.
Its function is 3 uniform interior adjusting screws 15 of connection so as to hang 3 interior leaf springs 12.
06) internal frame pole 6
Internal frame pole 6 is a kind of cylindrical posts, and stock two is provided with external screw thread.
Its position and annexation are：
The upper end of internal frame pole 6 is threadedly coupled with disk on internal frame 5, and the lower end of internal frame pole 6 is threadedly coupled with interior base 10.
Its function is be connected disk 5 and interior base 10 on internal frame.
07) reflecting prism base 7
Reflecting prism base 7 is a kind of disk, and upper surface is provided with screwed hole and is used for fixed capacity displacement transducer 3 and reflection
Prism 8.
Its function is to provide support for reflecting prism 8.
08) reflecting prism 8
Reflecting prism 8 is a kind of general part, is fixed on reflecting prism base 7.
Its function is as by vibration isolation object, the light beam of reflection falling bodies mechanism.
09) outer base 9
Outer base 9 is a kind of disk, and it is evenly equipped with 6 tapped through holes above, wherein 3 screwed holes are used to fix outrigger branch
14,3 screwed holes of bar are used to connect levelling bolt 11.
Its position and annexation are：
The lower end of outer base 9 is provided with 3 uniform levelling bolts 11, upper surface and 3 uniform lower end spiral shells of outrigger pole 14
Line is connected.
Its function is to provide support for whole device.
10) interior base 10
Its 26S Proteasome Structure and Function of interior base 10 is similar to outer outer base 9；
Specifically, interior base 10 is a kind of disk, and it is evenly equipped with 3 tapped through holes above, and outside is laid with 3 pieces
Spring mounting hole.
Its position and annexation are：
Interior base 10 is threadedly coupled with the uniform lower end of internal frame pole 6 in top three, and interior base 10 is suspended on 3 outer leaf springs
4 lower ends.
Its function is to provide support for disk on internal frame 5, connects outer leaf spring 4.
11) levelling bolt 11
Levelling bolt 11 is 3 uniform General purpose screws, is distributed on the lower surface of outer base 9.
Its function is to adjust the horizontal level of whole device.
12) leaf spring 12 in
Interior its 26S Proteasome Structure and Function of leaf spring 12 is similar to outer leaf spring 4；
Specifically, interior leaf spring 12 includes 3 leaf springs for being distributed on the lower section of disk 5 on internal frame.
Its position and annexation are：
The upper end of 3 interior leaf springs 12 is connected with 3 interior adjusting screws 15, the lower end suspension reflecting prism of 3 interior leaf springs 12
Base 7.
Its function is reflecting prism base 7 is formed elastic construction with disk 5 on internal frame.
13) magnetic cylinder coil 13
Magnetic cylinder coil 13 is a kind of general part being made up of coil and magnetic cylinder；
Its position and annexation are：
Magnetic cylinder is fixed on the center above outer base 9, and coil is fixed on the center below interior base 10, coil
Insert in magnetic cylinder, lead-out wires of coil is into feedback circuit 0.
Its function is to provide feedback force for the interior base 10 of vibration isolator.
14) outrigger pole 14
Its 26S Proteasome Structure and Function of outrigger pole 14 is similar to internal frame pole 6；
Specifically, outrigger pole 14 is a kind of cylindrical posts.
Its position and annexation are：
The upper end of outrigger pole 14 is connected disk 1 on outrigger, and the lower end of outrigger pole 14 is connected outer base 9.
Its function is that disk 1 and outer base 9 are an entirety on connection outrigger.
15) adjusting screw 15 in
Interior its 26S Proteasome Structure and Function of adjusting screw 15 is similar to outer adjusting screw 2；
Its position and annexation are：
3 interior adjusting screws 15 are connected with uniform 3 through holes on disk on internal frame 5, and the interior lower end of adjusting screw 15 connects inner sheet
Spring 12.
The function of interior adjusting screw 15 is：
Make the interior upper end level of leaf spring 12 adjustable, so as to leveling reflecting prism base 7.
3rd, the working mechanism of this vibration isolator：
Such as Fig. 1, whole vibration isolator has stronger vibration isolation effect, i.e., when local vibration drives the vibration of vibration-isolating platform outer base 9,
Outrigger pole 14 is with ground vibration, due to the effect of inertia of piece spring structure, the remains stationary of reflecting prism 8；And it is mounted in reflecting prism
Capacitive displacement transducer 3 on base 7 can measure displacement of the reflecting prism 8 relative to interior base 10, will by feedback circuit 0
Displacement variable is converted to electric signal；Size of current and direction on this electric signal control magnetic cylinder coil 13, so that interior base
10, by the power equal in magnitude, in opposite direction of the relative displacement with reflecting prism 8 and interior base 10, make the phase of reflecting prism base 7
Origin-location is kept to be basically unchanged for the earth's core；The coupling of three interior 12, three outer leaf springs 4 of leaf spring provides two level elasticity knot
Structure, this vibration isolator of formation have stronger vibration isolating effect.
4th, the application of this vibration isolator
Such as Fig. 3, falling bodies mechanism B is provided with above support A, this vibration isolator C is positioned over falling bodies mechanism B underface,
The beam alignment of reflecting prism 8 and falling bodies mechanism B in this vibration isolator C.
This vibration isolator C has stronger vibration isolation effect, i.e., when local vibration drives the vibration of vibration-isolating platform outer base 9, outrigger branch
Bar 14 is with ground vibration, due to the effect of inertia of piece spring structure, the remains stationary of reflecting prism 8；Measured using absolute gravimeter
When, reflecting prism 8 is installed in this vibration isolator C, is had preferable anti-vibration performance i.e. holding and the earth's core geo-stationary, be ensure that instrument
Device is not influenceed by ground vibration.
Claims (2)
1. a kind of two level vibration isolator based on piece spring structure, including feedback circuit（0）；It is characterized in that：
It is provided with disk on outrigger（1）, outer adjusting screw（2）, capacitance displacement sensor（3）, outer leaf spring（4）, disk on internal frame（5）、
Internal frame pole（6）, reflecting prism base（7）, reflecting prism（8）, outer base（9）, interior base（10）, levelling bolt（11）, it is interior
Leaf spring（12）With magnetic cylinder coil（13）, outrigger pole（14）With interior adjusting screw（15）；
Its position and annexation are：
Outer base（9）With disk on outrigger（1）By 3 uniform outrigger poles（14）The threaded connection at both ends is fixed into whole outside one
Body framework；
In outer base（9）Bottom surface be evenly equipped with 3 levelling bolts（11）, by adjusting 3 levelling bolts（11）Make whole vibration isolation
Device and ground keep level；
Interior base（10）By 3 outer leaf springs being distributed on outrigger immediately below disk 1（4）Suspension；
Interior base（10）With disk on internal frame（5）By 3 internal frame poles（6）The threaded connection at both ends is fixed into overall frame in one
Frame；
Reflecting prism base（7）By being distributed on disk on internal frame（5）3 interior leaf springs of underface（12）Suspension；
Reflecting prism（8）It is fixed on reflecting prism base（7）Surface；
In reflecting prism base（7）And reflecting prism（8）Between be provided with capacitance displacement sensor（3）, in interior base（10）With
Outer base（9）Between be provided with magnetic cylinder coil（13）, capacitance displacement sensor（3）, feedback circuit（0）With magnetic cylinder coil（13）According to
Secondary connection；
3 outer leaf springs（4）Upper end and outrigger on 3 outer adjusting screws on disk 1（2）Connect respectively, 3 interior leaf springs（12）'s
Upper end and disk on internal frame（5）On 3 interior adjusting screws（15）Connect respectively；
By adjusting 3 levelling bolts（11）, 3 pieces outer adjusting screws（2）With 3 interior adjusting screws（15）Ensure each portion in device
The equal keep level of part.
A kind of 2. two level vibration isolator based on piece spring structure as described in claim 1, it is characterised in that：
Disk on described outrigger（1）It is a kind of disk；
It is provided with round tube hole among it（1-0）, for reflecting prism（8）Printing opacity；
Its lower surface is evenly equipped with the 1st, 2,3,4,5,6 minor thread holes（1-1、1-2、1-3、1-4、1-5、1-6）；
1st, 3,5 minor thread holes（1-1、1-3、1-5）With outrigger pole（14）Top connection；
2nd, 4,6 minor thread holes（1-2、1-4、1-6）With outer adjusting screw（2）Connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721246081.9U CN207213035U (en) | 2017-09-27 | 2017-09-27 | A kind of two level vibration isolator based on piece spring structure |
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|---|---|---|---|
| CN201721246081.9U CN207213035U (en) | 2017-09-27 | 2017-09-27 | A kind of two level vibration isolator based on piece spring structure |
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| CN207213035U true CN207213035U (en) | 2018-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489733A (en) * | 2017-09-27 | 2017-12-19 | 中国地震局地震研究所 | Two level vibration isolator based on piece spring structure |
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2017
- 2017-09-27 CN CN201721246081.9U patent/CN207213035U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489733A (en) * | 2017-09-27 | 2017-12-19 | 中国地震局地震研究所 | Two level vibration isolator based on piece spring structure |
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