CN101532546B - Spring-combination-type vibration isolator - Google Patents
Spring-combination-type vibration isolator Download PDFInfo
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- CN101532546B CN101532546B CN2009100294822A CN200910029482A CN101532546B CN 101532546 B CN101532546 B CN 101532546B CN 2009100294822 A CN2009100294822 A CN 2009100294822A CN 200910029482 A CN200910029482 A CN 200910029482A CN 101532546 B CN101532546 B CN 101532546B
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Abstract
The invention discloses a spring-combination-type vibration isolator. One end of an inner hole of a shell is provided with an inner thread, and the other end of the inner hole is provided with the end face with a cross slot hole; an anti-rotation sleeve is arranged in the inner hole; the anti-rotation sleeve is provided with a semi-enclosed annular groove in the axial direction; the enclosed side of the anti-rotation sleeve clings to the end face of the inner hole of the shell; an axial rigidity buffer is arranged in the annular groove; a locking bolt is in a stepped shaft-shaped structure; the small end of the locking bolt is inserted into a center hole of the anti-rotation sleeve; the big end of the locking bolt extends out the shell; the big end of locking bolt is provided with a threaded hole for installation in the axial direction; an axial-horizontal rigidity buffer is arranged on an outer circle of the big end of the locking bolt; and a regulating thread sleeve is arranged in the inner hole of the shell through threaded connection and is positioned in an outer layer of the axial-horizontal rigidity buffer for regulating the tightness thereof. The vibration isolator of the type has the advantages of small volume, light weight, adjustable triaxial rigidity and the like. A cross anti-rotation device on the back end part of the locking bolt can prevent the accompanying rotation of the vibration isolator when a screw is arranged and wound, so that the wrench space for installation is saved.
Description
Technical field
The present invention relates to the last employed vibration isolator of a kind of missile-borne or the airborne miniaturized electronics of fighting, belong to the environment and the reliability control field of electronic equipment.
Background technique
Guided missile and fighter plane air environment have little, the lightweight characteristics of own vol, but the residing vibratory impulse environment of electronic equipment is very harsh again, and volume must be very little, even the space of placing assembly wrench does not all have.Therefore, vibration isolator not only wants volume small and exquisite, has good anti-vibration and shock performance, and requires connecting bolt self to have anti-transfer device.
Fig. 1 is the S30-04 type rubber vibration isolator structural drawing that is adopted on the Su-30MKK variant that China pays by Russian Amur Komsomolsk aircraft factory in 2000, and it mainly is made up of housing 21, coupling shaft 22, rubber spring 23, the anti-pivoted housing 24 of nylon, wavy spring 25 and locking swivel nut 26.It has simple in structure, the advantage that volume is little, but also have a lot of problems, mainly show:
1, resonant frequency point is higher, f
n〉=220Hz dynamic response comparison diagram, and fierce (seeing Fig. 3 for details) amplified in resonance.On the 2nd cursor line as seen, at f
nDuring=222.5Hz, table top excitation Y
1=0.119587g
2/ Hz, it responds Y
2=2.99401g
2/ Hz, η
Max=2.99401/0.119587=25.04 doubly.
2, overall vibration isolating effect is relatively poor.Compared by 09.1.10 report and 09.1.12 report, its table top excitation root mean square acceleration passage 1 expression 14.597g (abroad), anchor clamps excitation 22.393g (abroad) are close.Product response 13.295g than excitation 14.597g only little 8.9%.14.597-13.295/14.597=8.9% sees table 1 for details.
3, its main elastic component adopts rubber material, and damping ratio is little, and is easily aging.Be difficult for after the moulding regulating.
4, the anti-pivoted housing 24 of nylon adopts square opening on a square opening and coupling shaft 22 another square boss and the housing 21 scheme that matches.Owing to all have big gap to impact displacement between two cooperations, do not play the corner position-limiting action so only play the anti-rotation effect with compensation vibration.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of good damping result in order to overcome above-mentioned defective, simultaneously not only can anti-rotation, but also play the vibration isolator of corner position-limiting action.
Spring-combination-type vibration isolator of the present invention comprises shell, Adjusting bolt Adjusting screw, lock bolt, anti-pivoted housing, the axial rigidity buffer with endoporus and axially reaches the horizontal rigidity buffer that one end of described shell endoporus is provided with internal thread, and the other end has end face; Anti-pivoted housing is installed in this endoporus, axially is provided with semi-enclosed circular groove at the anti-rotation cover, and a side of anti-pivoted housing sealing is close to the end face of shell endoporus, and the axial rigidity buffer is installed in the described circular groove; Lock bolt is a multidiameter shaft shape structure, its small end inserts in the center hole of anti-pivoted housing, big end extends shell always, the tapped hole that usefulness is installed that is axially arranged with at big end, axially reaching the horizontal rigidity buffer is installed on the cylindrical of the big end of lock bolt, Adjusting bolt Adjusting screw is installed in the shell endoporus by being threaded, and is positioned at the skin that axially reaches the horizontal rigidity buffer, is used to regulate its tightness.
Described axial rigidity buffer is installed with the tandem compound form according to the demand of axial rigidity by minibuffer pad and little belleville spring.The tandem compound form has multiple as required, and preferred a kind of erection sequence is the first little belleville spring and minibuffer pad, the second little belleville spring, the second little belleville spring.
The described horizontal rigidity buffer that axially reaches is installed with the tandem compound form according to the demand that axially reaches horizontal rigidity by plane spring, big belleville spring, friction plate, big cushion pad, slide plate and catch.The tandem compound form has multiple as required, and preferred a kind of is first plane spring, big belleville spring and friction plate, second largest belleville spring, big cushion pad and slide plate, the 3rd plane spring, catch.
In order to play the corner position-limiting action, on the end face of described shell, be provided with the cruciform vent of anti-rotation, the small end of lock bolt be level to plat shaft, the center hole and the plat shaft of anti-pivoted housing are complementary, be symmetrical arranged the long strip projection up and down in anti-pivoted housing exterior edge face, this long strip projection matches with the cruciform vent of shell.
The present invention is compared with prior art:
1, resonant frequency point is lower: see Fig. 3 dynamic response comparison diagram and table 1, the present invention by on the 1st cursor line as seen, resonant frequency f
n=172.5Hz, table top excitation Y
3=0.0817029g
2/ Hz, it responds Y
4=0.153538g
2/ Hz, η
Max=0.153538/0.0817029=1.879 times, external η under same incentive condition
Max=25.04 times.
2, overall vibration isolating effect is better: compare by 09.1.10 report and 09.1.12 report, and table top excitation root mean square acceleration passage 1 expression 14.304g of the present invention, anchor clamps excitation 22.121g, this numerical value and external product are close.But external product response 13.295g than excitation 14.597g only little 8.9%.14.597-13.295/14.597＝8.9％。And 14.304-5.815/14.304=59.34% of the present invention, vibration isolating effect has improved 6.6674 times of 59.34%/8.9%=6.6674 than external product, sees table 1 for details.
3, the present invention adopts 3 kinds of different Flexible elements, can be according to system's anti-vibration and shock requirement, and independent assortment has bigger flexibility.And the present invention is the full-metallic vibration isolator, has overcome the aging unstable properties that reaches at high/low temperature condition of rubber spring.
4, the anti-pivoted housing of the nylon of prior art adopts on another square boss of a square opening and coupling shaft and the housing square opening scheme that matches.Owing to all have big gap to impact displacement between two cooperations, do not play the corner position-limiting action so only play the anti-rotation effect with compensation vibration.And patent of the present invention adopts the cruciform vent structure, and fitting surface adopts and is slidingly matched, not only can anti-rotation, but also play the corner position-limiting action.
Table 1 the present invention and the external product root mean square response acceleration table of comparisons
Description of drawings
Fig. 1 is the structural representation of external product;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is the dynamic response comparison diagram;
Fig. 4 is the structural representation of shell among Fig. 2, and wherein a is a plan view, and b partly cuts open left view;
Fig. 5 is the structural representation of anti-pivoted housing among Fig. 2, and wherein a is a plan view, and b partly cuts open left view;
Fig. 6 is the structural representation of lock bolt among Fig. 2, and wherein a is a plan view, and b is the partial cutaway left view;
Fig. 7 is the structural representation of Fig. 2 midplane spring; Wherein a is single head α
AB=360 ° of plane springs; B is single head α
AB=450 ° of plane springs; C is double end α
AB=645 ° of plane springs;
Fig. 8 is the structural representation of belleville spring among Fig. 2; Wherein a is no supporting surface belleville spring, and b has the supporting surface belleville spring.
Fig. 9 is the characteristic curve of belleville spring.
Figure 10 is the load-deflection curve figure of different belleville spring compound modes; Wherein a is involutory cluster spring load-deflection curve figure, and b is a composite combined spring rate performance diagram.
Embodiment
As shown in Figure 2, spring-combination-type vibration isolator of the present invention, mainly comprise shell 1, Adjusting bolt Adjusting screw 2, lock bolt 3, anti-pivoted housing 4, axial rigidity buffer and axially reach the horizontal rigidity buffer with endoporus, wherein shell 1 has endoporus, one end opening of this endoporus, be provided with internal thread in the opening, the other end has end face, and this end face is provided with cruciform vent 13 and sees Fig. 4; Anti-pivoted housing 4 is installed in this endoporus, be axially arranged with semi-enclosed circular groove at anti-pivoted housing 4, one side of anti-pivoted housing 4 sealings is close to the end face of shell endoporus, on the exterior edge face of anti-pivoted housing 4 sealings one side, be symmetrical arranged long strip projection 14 Fig. 5 a up and down, this long strip projection 14 matches with the cruciform vent 13 of shell and sees Fig. 5.The axial rigidity buffer is installed in the described circular groove; Lock bolt 3 is a multidiameter shaft shape structure, the small end of lock bolt 3 be level to plat shaft, plat shaft inserts in the corresponding with it flat center hole of anti-pivoted housing 4, the big end of lock bolt 3 extends shell 1 always, at the tapped hole that usefulness is installed that is axially arranged with of big end, the installation base plate 15 that connects aircraft or guided missile by tapped hole is seen Fig. 6 b.Axially and the horizontal rigidity buffer be installed on the outer rims of lock bolt 3 big ends, Adjusting bolt Adjusting screw 2 is installed in the shell endoporus by being threaded, and is positioned at axially and the skin of horizontal rigidity buffer is used to regulate its tightness.
The rigidity buffer of above-mentioned lock bolt 3 postive directions is installed with the tandem compound form according to the demand of axial rigidity by minibuffer pad 9 and little belleville spring 11.The erection sequence of the tandem compound form of present embodiment is the first little belleville spring and minibuffer pad, the second little belleville spring, the 3rd little belleville spring.
In order to satisfy the little requirement of volume, the main elastic element of the present invention adopts thin type plane spring and belleville spring.
1, plane spring
Plane spring claims plane scroll spring again, and its structural type as shown in Figure 7.Its outer shroud radius R
1, R
2In R
1Link to each other interior ring radius r with shell
1And r
2In r
2Link to each other with lock bolt, at R
2And r
1Between the space in, the spring thread that has the A Jide helical to form.Change spring thread width δ and spring thread head and count n and thickness of slab, and the shared angle [alpha] of line length L
AB, can in a big way, change its horizontal rigidity.Increase the support span between two plane springs, can improve the stability of its horizontal axis.Wherein Fig. 7 a is single head α
AB=360 ° of plane springs; Fig. 7 b is single head α
AB=450 ° of plane springs; Fig. 7 c is double end α
AB=645 ° of plane springs.
2, belleville spring
The thin type belleville spring as shown in Figure 8, wherein Fig. 8 a is no supporting surface belleville spring, Fig. 8 b has the supporting surface belleville spring.The thickness of slab t of belleville spring also can be very little, and its axial rigidity is gone back and t and free deformation height h except that outside the Pass having with t
0Ratio h
0/ t is relevant.With h
0The ratio difference of/t, its rigidity present strong non-linear property Fig. 9.In addition, carry out series, parallel, can obtain different load-deflection curve charts 2 again by belleville spring with identical characteristics.These advantageous characteristics require to provide convenience for satisfying different elasticity.
Table 2: the series parallel connection of belleville spring and and stiffness characteristics
| Compound mode and characteristic line | Load, distortion and height |
| Involutory cluster spring: (see Figure 10 a) by the series connection of monolithic dish spring | F z＝F f z＝if H z＝iH 0 |
| Composite combined spring: series connection (seeing Figure 10 b) again after the parallel connection of biplate dish spring | F z＝nF f z＝if H z＝i[H 0+(n-1)t]? |
3, elastic network(s) cushion pad
Form by the extruding of elastic metallic yarn braid, its convenient formation, rigidity is relevant with the specific volume per unit volume gauze pad weight of elasticity silk screen.Specific volume greatly, then rigidity is big.Screw in the present invention or unclamp Adjusting bolt Adjusting screw 2.Can when regulating the belleville spring axial rigidity, change the rigidity of buffering cushion cover.
4, friction plate
Friction plate of the present invention is packed tightly relatively by 2 dish springs, the damping force when dry friction has therebetween formed Vibrant buffer.
5, lock bolt rotation prevention structure
One end of lock bolt 3 is the M screw, is used for linking with installation base plate 15 (seeing Fig. 6 b), and the other end is for being inserted in the plat shaft in the cross anti-pivoted housing 4.Both can be in horizontal plane slide relative; To prevent that pivoted housing 4 is inserted in has cross recessed shell 1 in the bottom.When shell 1 with after equipment links to each other, then lock bolt 3 is subjected to anti-pivoted housing 4 restrictions of cross, can't and shell 1 between produce relative rotation.When lock bolt 3 and installation base plate 15 (seeing Fig. 6 b) when being connected with screw, do not need to block lock bolt with spanner, saved installing space.
Spring-combination-type vibration isolator of the present invention is by being with cross recessed shell 1, lock bolt 3, Adjusting bolt Adjusting screw 2 as main components.With shell 1 inner hole centreline is benchmark, be inserted in the anti-pivoted housing 4 of cross, minibuffer pad 9, saucer type spring assembly 11 successively, pack into behind the lock bolt 3, continue plane spring 6, big disk spring 12, friction plate 5, big cushion pad 10, slide plate 7, catch 8, Adjusting bolt Adjusting screw 2 etc. are inserted on the lock bolt 3 by the order and the quantity of Fig. 2 defined.Screw Adjusting bolt Adjusting screw 2, be adjusted to desired level rigidity, vertical stiffness after, it is solidified with being threaded of shell 1 shuts, formed whole of vibration isolator of the present invention.
Characteristics of the present invention:
1., adopt thin type plane spring, thickness of slab can be very thin, the axial dimension space that occupies when thickness of slab≤2mm is very little, and at identical thickness of slab, identical appearance and size R1R
2, identical endoporus r2r
1Under the condition, can be by changing a number n and the every angle [alpha] that the line line length is occupied of Archimedes spiral live width δ and helicalABChange its horizontal rigidity. And can form spring system in parallel in 2 of same axis installations and multi-disc, obtain required horizontal rigidity.
2., adopt thin type disk spring, the different thickness of slab t of employing and Free Transform space h0Acquisition is at different h0Strong nonlinearity elastic characteristic under the ratio of/t adopts the in parallel or series connection of multi-disc dish reed can obtain required axial rigidity characteristic;
3., because level can be separated with vertical stiffness and designed, therefore then combination is easy to obtain required three stiffness characteristics such as axially.
4., adopt the bolt anti-rotation device, save the spanner space and be convenient to install;
5., the normal pressure of friction plate strengthens with axial compressive force and increases, damping force can strengthen with amplitude be increased.
Claims (4)
1. spring-combination-type vibration isolator, it is characterized in that: it comprises shell (1), Adjusting bolt Adjusting screw (2), lock bolt (3), anti-pivoted housing (4), the axial rigidity buffer with endoporus and axially reaches the horizontal rigidity buffer, one end of described shell (1) endoporus is provided with internal thread, and the other end has end face; Anti-pivoted housing (4) is installed in this endoporus, is axially arranged with semi-enclosed circular groove at anti-pivoted housing (4), and a side of anti-pivoted housing (4) sealing is close to the end face of shell endoporus, and the axial rigidity buffer is installed in the described circular groove; Lock bolt (3) is a multidiameter shaft shape structure, its small end inserts in the center hole of anti-pivoted housing (4), big end extends shell (1) always, the tapped hole that usefulness is installed that is axially arranged with at big end, axially reaching the horizontal rigidity buffer is installed on the big cylindrical of holding of lock bolt (3), Adjusting bolt Adjusting screw (2) is installed in the shell endoporus by being threaded, and is positioned at the skin that axially reaches the horizontal rigidity buffer.
2. spring-combination-type vibration isolator according to claim 1 is characterized in that: described axial rigidity buffer is installed with the tandem compound form according to the demand of axial rigidity by minibuffer pad (9) and little belleville spring (11).
3. spring-combination-type vibration isolator according to claim 1 and 2 is characterized in that: the described horizontal rigidity buffer that axially reaches is installed with the tandem compound form according to the demand that axially reaches horizontal rigidity by plane spring (6), big belleville spring (12), friction plate (5), big cushion pad (10), slide plate (7) and catch (8).
4. spring-combination-type vibration isolator according to claim 1 and 2, it is characterized in that: the cruciform vent (13) that on the end face of described shell (1), is provided with anti-rotation, the small end of lock bolt (3) be level to plat shaft, the center hole and the plat shaft of anti-pivoted housing (4) are complementary, be symmetrical arranged long strip projection (14) up and down in anti-pivoted housing (4) exterior edge face, this long strip projection (14) matches with the cruciform vent (13) of shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100294822A CN101532546B (en) | 2009-04-14 | 2009-04-14 | Spring-combination-type vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100294822A CN101532546B (en) | 2009-04-14 | 2009-04-14 | Spring-combination-type vibration isolator |
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| Publication Number | Publication Date |
|---|---|
| CN101532546A CN101532546A (en) | 2009-09-16 |
| CN101532546B true CN101532546B (en) | 2011-05-18 |
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|---|---|---|---|
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709850B (en) * | 2009-12-04 | 2012-10-10 | 海洋王照明科技股份有限公司 | Vibration damper and lamp using same |
| CN101761884B (en) * | 2010-02-04 | 2012-08-15 | 海洋王照明科技股份有限公司 | Vibration isolator and lamp with vibration isolator |
| CN103398139B (en) * | 2013-08-01 | 2015-02-25 | 湖南大学 | Dish-shaped rubber quasi-zero stiffness vibration isolator |
| CN106678267B (en) * | 2016-11-22 | 2018-08-14 | 常州大学 | A kind of combined shock absorber with three rank intrinsic frequencies |
| CN107327530A (en) * | 2017-08-15 | 2017-11-07 | 安徽理工大学 | A kind of new bidirectional modulation buffer |
| CN110030316B (en) * | 2019-03-25 | 2024-06-11 | 南京捷诺环境技术有限公司 | Precision corner limiting shock-resistant vibration-isolating buffer platform for small photoelectric equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201407310Y (en) * | 2009-04-14 | 2010-02-17 | 南京捷诺环境技术有限公司 | Spring combined type vibration isolator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201407310Y (en) * | 2009-04-14 | 2010-02-17 | 南京捷诺环境技术有限公司 | Spring combined type vibration isolator |
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