CN202402557U - Pressure-lever type passive low-frequency three-way vibration isolator - Google Patents
Pressure-lever type passive low-frequency three-way vibration isolator Download PDFInfo
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- CN202402557U CN202402557U CN2011205559860U CN201120555986U CN202402557U CN 202402557 U CN202402557 U CN 202402557U CN 2011205559860 U CN2011205559860 U CN 2011205559860U CN 201120555986 U CN201120555986 U CN 201120555986U CN 202402557 U CN202402557 U CN 202402557U
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Abstract
The utility model relates to a pressure-lever type passive low-frequency three-way vibration isolator. A lower elastic element, a round support table, an upper elastic element and a disc-shaped upper baffle are sequentially arranged in a base of the vibration isolator; the lower ends of more than three elastic pressure levers respectively penetrate through more than three round holes on the upper baffle and then are connected with the support table, the upper end of the more than three pressure levers are respectively connected with a round cover-shaped bearing shell, and the more than three pressure levers are sleeved with rubber damping sleeves; the bearing shell is arranged on the upper part of the base, the annular elastic elements are arranged on the inner side wall of the bearing shell, and a damping cylinder is arranged at the top of the inner side of the bearing shell; and liquid damping material is filled into the damping cylinder. The vibration isolator has super-low-frequency vibration isolating anti-impact performance in the vertical direction and the horizontal direction and can be widely applied to the vibration-isolating finish machining and the vibration control of a measuring instrument. The vibration isolator is a passive shock absorber and can realize low-frequency vibration isolating anti-impact function without adding energy.
Description
Technical field
The utility model belongs to the antivibration area of precision type instrument, is specifically related to be used for the low frequency vibration isolation device of low frequency environments precision machining and measurement.
Technical background
Along with the fast development in various precision engineerings field, ultraprecise processing and Technology of Precision Measurement have proposed increasingly high requirement to its working environment.The microvibration of external environment will reduce the machining accuracy of ultraprecise instrument greatly, make various precision measuremnts bigger error occur, even measurement can't be carried out, so the anti-vibration performance of precision type instrument directly affects the performance of its operation.The leading indicator that influences anti-vibration performance is the natural frequency and the damping ratio of vibrating isolation system, and wherein natural frequency plays an important role, and the natural frequency that reduces vibrating isolation system can significantly improve the vibration isolation ability of system.Traditional vibrating isolation system can be good at the centering high frequency band and isolates, but since its contradiction between quiet bearing capacity and low rigidity, the very difficult natural frequency that reduces system again.For low frequency vibration isolation, adopt pneumatic spring and active vibration isolator usually at present, however though pneumatic spring can reduce the natural frequency of system, complex structure, bulky, cost an arm and a leg, and need auxiliary air machinery; Though some active vibration isolators can be good at carrying out low frequency vibration isolation, need extra control system, and need to consume lot of energy, so these two kinds of vibration isolators all are difficult in the actual engineering and are widely used.
In order to solve the vibration isolation problem that traditional vibration isolator is not suitable for low frequency environments, some researchers are incorporated into negative stiffness mechanism in the low frequency vibration isolation system.Utilize negative stiffness mechanism and positive rigid spring to carry out parallel connection, developed some low frequency vibration isolation devices.Though this positive negative stiffness parallel connection vibration isolator has ultralow rigidity in certain interval; Can carry out superlow frequency vibration isolating, narrow but it exists between the active region, the shortcoming of unstability takes place easily; And be research mostly, also have with a certain distance from practical application to vertical vibration isolation.Therefore be necessary to develop a kind of passive low frequency three-dimensional vibration isolator that is applicable to the low frequency environments vibration isolation.
The model utility content
In order to solve the vibration isolation problem of low frequency environments, the utility model provides a kind of pressure bar type passive low frequency three-dimensional vibration isolator that is applicable to the low frequency environments vibration isolation.
The utility model realizes that the technological scheme of above-mentioned purpose is following:
Pressure bar type passive low frequency three-dimensional vibration isolator comprises the base 7 of round barrel shape; The middle part is provided with down elastic element 6 in the base 7; Base 7 upper, open end sidewalls are provided with a ring-shaped step, are laid with the guiding groove more than two 11 vertically on base 7 inwalls of said ring-shaped step bottom; The top of following elastic element 6 is provided with circular support platform 5, is laid with guide pad 12 and guiding groove two or more 11 corresponding matching of guide pad more than 12, two more than two on the circumference of support platform 5, and support platform 5 middle parts are provided with elastic element 17; The top of last elastic element 17 is provided with discoid overhead gage 4, and the bottom circumference of overhead gage 4 contacts with ring-shaped step place on the base 7; Be uniformly distributed with the circular hole that offers more than three on the overhead gage 4; The corresponding respectively circular hole more than three that passes on the overhead gage 4 in the lower end of the elastic pressure bar 3 more than three is connecting support platform 5; The upper end of the elastic pressure bar 3 more than three is connecting respectively and is being arranged with rubber damping cover 9 on the elastic pressure bar 3 of load-carrying covering more than 1, three of rounded cover cap shape; Load-carrying covering 1 is located at the top of base 7, and the madial wall of load-carrying covering 1 is provided with the elastic element 8 of annular, and load-carrying covering 1 inside top is provided with damped cylinder 2.
Be laid with four guiding grooves 11 vertically on base 7 inwalls of said ring-shaped step bottom; Correspondence is laid with four guide pads 12 on the circumference of said support platform 5.
Said elastic element 6 down is wire rope spring or helical spring or rubber-metal complex spring with last elastic element 17; Elastic element 8 materials of said annular are wire rope spring or rubber or Rubber steel wire rope complex spring.
Said support platform 5 middle parts offer through hole, and the through hole upper end that centre pilot 14 passes support platform 5 is connecting overhead gage 4, and the lower end is connecting base 7; Be set with elastic element 17 on the centre pilot 14 between support platform 5 and the overhead gage 4, be set with down elastic element 6 on the centre pilot 14 between support platform 5 and the base 7, the said elastic element 17 of going up is helical spring with following elastic element 6.
Be uniformly distributed with on the said overhead gage 4 and offer four circular holes, corresponding respectively four circular holes that pass on the overhead gage 4 in the lower end of four elastic pressure bars 3 are connecting load-carrying covering 1 through flange respectively through the upper end that flange is connecting 5, four elastic pressure bars 3 of support platform.
Said damped cylinder 2 is a kind of liquid power consumption buffer, and what the inside was injected is the liquid damping material.
The useful technique effect of the utility model is embodied in following several aspect:
1, the pressure bar type passive low frequency three-dimensional vibration isolator of the utility model can all be realized superlow frequency vibration isolating on Vertical direction and substantially horizontal under the prerequisite that guarantees than large bearing capacity;
2, some negative stiffness vibration isolators relatively, the resilient elongate depression bar is the state that is operated in before the unstability in the utility model, so vibrating isolation system is stable higher;
3, the utility model is provided with multiple damping energy dissipation mechanism, according to concrete enforcement operating mode, brings into play different damping energy dissipation effects;
4, the pressure bar type passive low frequency three-dimensional vibration isolator of the utility model has low frequency vibration isolation and shock resistance dual functions with Vertical direction simultaneously in the horizontal direction;
5, the utility model is passive passive dampers may, does not need external energy just can realize the effect of low frequency vibration isolation anti-impact.
Description of drawings
Fig. 1 is the overall structure figure that first kind of mode of execution presses down rod-type passive low frequency three-dimensional vibration isolator.
Fig. 2 is the overall structure figure that second kind of mode of execution presses down rod-type passive low frequency three-dimensional vibration isolator.
Fig. 3 presses down the overall structure figure of rod-type passive low frequency three-dimensional vibration isolator for the third mode of execution.
Fig. 4 is the plan view of lower bottom base among Fig. 1.
Fig. 5 is the plan view of following support platform among Fig. 1.
Fig. 6 is the plan view of overhead gage among Fig. 1.
Sequence number among the last figure: 1. load-carrying covering, 2. damped cylinder, 3. elastic pressure bar, 4. overhead gage, 5. support platform, 6. descend elastic element, 7. base, 8. elastic element, 9. rubber damping cover, the 10. elastic element on flange, 11. guiding grooves, 12. guide pads, 13. clamping plate, 14. centre pilots, 15. linear bearings, 16. limited rings, 17. of annular.
Embodiment
Below in conjunction with accompanying drawing, do explanation further through embodiment's the utility model.
Referring to Fig. 1; Pressure bar type passive low frequency three-dimensional vibration isolator comprises the base 7 of round barrel shape; Be uniformly distributed with the following elastic element 6 that is equipped with more than three through clamping plate 13 in the base 7; Following elastic element 6 is the wire rope spring, designs bearing capacity required on the vertical direction, rigidity and damping through diameter, number of share of stock, length, the number of turns, canoe and the tightness of design wire rope.Base 7 upper, open end sidewalls are provided with a ring-shaped step, are laid with four guiding grooves 11 vertically on base 7 inwalls of ring-shaped step bottom, see Fig. 4; The top of following elastic element 6 is provided with circular support platform 5; Be laid with four guide pads 12 on the circumference of support platform 5, see Fig. 5, four guide pads 12 and four guiding groove 11 corresponding matching; Support platform 5 is under the restriction of guiding groove 11 and guide pad 12, but vertical motion in base 7.Elastic element 17 is equipped with at support platform 5 middle parts, and last elastic element 17 also is the wire rope spring; Discoid overhead gage 4 is equipped with at the top of last elastic element 17, sees Fig. 6, and the bottom circumference of overhead gage 4 contacts with ring-shaped step place on the base 7.Be uniformly distributed with on the overhead gage 4 and offer four circular holes; Corresponding respectively four circular holes that pass on the overhead gage 4 in the lower end of four elastic pressure bars 3 are connecting support platform 5 through flange 10; The upper end of four elastic pressure bars 3 is connecting through flange respectively and is being set with rubber damping cover 9 on 1, four elastic pressure bar 3 of load-carrying covering of rounded cover cap shape.Load-carrying covering 1 is located at the top of base 7; The madial wall of load-carrying covering 1 is provided with the elastic element 8 of annular; Elastic element 8 materials of annular are the wire rope spring, and load-carrying covering 1 inside top is installed with damped cylinder 2, and damped cylinder 2 is a kind of liquid power consumption buffer; Injected the liquid damping material in the damped cylinder 2, the vibrational energy on all directions that can dissipate.
The external force that receives Vertical direction when vibration isolator is done the time spent, and external force is delivered on the wire rope spring (following elastic element 6 and last elastic element 17) through load-carrying covering 1, elastic pressure bar 3 and support platform 5, on vertical direction, carries out low frequency vibration isolation by the wire rope spring.Less when vibration displacement, the wire rope spring does not produce dry-friction damping, and the wire rope spring mainly played the buffer memory vibrational energy, reduced the effect of vibration transmissibility this moment, and the energy that is stored in the wire rope spring is consumed by the damping material in the damped cylinder 2 gradually; When receiving impact or resonating; Vibration displacement is bigger, and bigger distortion takes place the wire rope spring, and between its each strand steel wire rope dry friction will take place this moment; Dry-friction damping is big rapidly; The energy that can effectively dissipate resonance and impact is that vibration displacement reduces rapidly, realizes the effect of vertical vibration isolation anti-impact.
The external force that receives substantially horizontal when vibrating isolation system is done the time spent, mainly carries out horizontal low frequency vibration isolation effect by elastic pressure bar 3.When vibration displacement hour, the rubber damping cover 9 that the transverse vibration energy mainly is arranged on the elastic pressure bar 3 consumes; Excessive or receive when impacting when vibration displacement; Flexible collision will take place with base 7 in load-carrying covering 1; The elastic element 8 that at this time is arranged on the annular on load-carrying covering 1 madial wall will absorb and consume the energy of vibratory impulse effectively, realize the effect of horizontal vibration isolation anti-impact.
Embodiment 2:
Referring to Fig. 2, be with embodiment 1 the main distinction: support platform 5 middle parts offer through hole, and the through hole upper end that centre pilot 14 passes support platform 5 is connecting overhead gage 4, and the lower end is connecting base 7; Be set with elastic element 17 on the centre pilot 14 between support platform 5 and the overhead gage 4, be set with down elastic element 6 on the centre pilot 14 between support platform 5 and the base 7, last elastic element 17 is helical spring with following elastic element 6.Be separately installed with limited ring 16 on the end face of the support platform 5 corresponding and on the bottom surface of overhead gage 4 with the top and bottom of last elastic element 17; Be separately installed with limited ring 16 on the bottom surface of the support platform 5 corresponding and the bottom surface of base 7 with the top and bottom of following elastic element 6.Elastic element 8 materials of annular are rubber.Other is with embodiment 1.Between support platform 5 and the centre pilot 14 linear bearing 15 is installed, guarantees that further it moves on vertical direction.In this embodiment, the processing of pressure bar type passive low frequency three-dimensional vibration isolator and equipment are easier, and it is less to be mainly used in some vibratory impulses, and the vertical vibration frequency does not need in the too low vibrating isolation system.
Embodiment 3:
Referring to Fig. 3, be with embodiment 3 the main distinction: following elastic element 6 is the rubber-metal complex spring with last elastic element 17 materials; Elastic element 8 materials of annular are the Rubber steel wire rope complex spring.Other is with embodiment 2.Mainly be damping and the bearing capacity that on embodiment 2 basis, has increased vibration isolator, being mainly used in the low frequency vibration isolation requirement is not in the vibrating isolation system of too strictness.
Claims (6)
1. pressure bar type passive low frequency three-dimensional vibration isolator; It is characterized in that: the base (7) that comprises round barrel shape; The middle part is provided with down elastic element (6) in the base (7); Base (7) upper, open end sidewall is provided with a ring-shaped step, is laid with the guiding groove more than two (11) vertically on base (7) inwall of said ring-shaped step bottom; The top of following elastic element (6) is provided with circular support platform (5); Be laid with the guide pad (12) more than two on the circumference of support platform (5); Guide pad more than two (12) and the guiding groove more than two (11) corresponding matching, support platform (5) middle part is provided with elastic element (17); Last elastic element (17) the top be provided with discoid overhead gage (4), the bottom circumference of overhead gage (4) contacts with ring-shaped step place on the base (7); Overhead gage is uniformly distributed with the circular hole that offers more than three on (4); The lower end of the elastic pressure bar more than three (3) circular hole more than three that passes on the overhead gage (4) of correspondence is respectively connecting support platform (5); The upper end of the elastic pressure bar more than three (3) is connecting the load-carrying covering (1) of rounded cover cap shape respectively, is arranged with rubber damping cover (9) on the elastic pressure bar more than three (3); Load-carrying covering (1) is located at the top of base (7), and the madial wall of load-carrying covering (1) is provided with the elastic element (8) of annular, and load-carrying covering (1) inside top is provided with damped cylinder (2).
2. pressure bar type passive low frequency three-dimensional vibration isolator according to claim 1 is characterized in that: be laid with four guiding grooves (11) vertically on base (7) inwall of said ring-shaped step bottom; Correspondence is laid with four guide pads (12) on the circumference of said support platform (5).
3. pressure bar type passive low frequency three-dimensional vibration isolator according to claim 1 is characterized in that: said elastic element (6) down and last elastic element (17) are wire rope spring or helical spring or rubber-metal complex spring; The elastic element of said annular (8) material is wire rope spring or rubber or Rubber steel wire rope complex spring.
4. pressure bar type passive low frequency three-dimensional vibration isolator according to claim 1; It is characterized in that: said support platform (5) middle part offers through hole; The through hole upper end that centre pilot (14) passes support platform (5) is connecting overhead gage (4), and the lower end is connecting base (7); Be set with elastic element (17) on the centre pilot (14) between support platform (5) and the overhead gage (4); Be set with down elastic element (6) on the centre pilot (14) between support platform (5) and the base (7), said upward elastic element (17) and following elastic element (6) are helical spring.
5. pressure bar type passive low frequency three-dimensional vibration isolator according to claim 1; It is characterized in that: be uniformly distributed with on the said overhead gage (4) and offer four circular holes; The lower end of four elastic pressure bars (3) four circular holes passing on the overhead gage (4) of correspondence is respectively connecting support platform (5) through flange, and the upper end of four elastic pressure bars (3) is connecting load-carrying covering (1) through flange respectively.
6. pressure bar type passive low frequency three-dimensional vibration isolator according to claim 1 is characterized in that: said damped cylinder (2) is a kind of liquid power consumption buffer, and what the inside was injected is the liquid damping material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205559860U CN202402557U (en) | 2011-12-28 | 2011-12-28 | Pressure-lever type passive low-frequency three-way vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205559860U CN202402557U (en) | 2011-12-28 | 2011-12-28 | Pressure-lever type passive low-frequency three-way vibration isolator |
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| Publication Number | Publication Date |
|---|---|
| CN202402557U true CN202402557U (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205559860U Expired - Lifetime CN202402557U (en) | 2011-12-28 | 2011-12-28 | Pressure-lever type passive low-frequency three-way vibration isolator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518742A (en) * | 2011-12-28 | 2012-06-27 | 中国科学技术大学 | Compression bar type passive low-frequency three-dimensional vibration isolator |
| CN104632985A (en) * | 2014-12-10 | 2015-05-20 | 兰州大学 | Passive compression type self-adaption vibration damper |
| CN104879435A (en) * | 2015-05-06 | 2015-09-02 | 常州大学 | Self-adaptive equal rigidity vibration isolator based on air floatation and electric combination three-dimensional decoupling |
| CN104912997B (en) * | 2014-03-13 | 2017-04-12 | 住友理工株式会社 | Vibration isolation device |
| CN113048191A (en) * | 2021-03-11 | 2021-06-29 | 哈尔滨工程大学 | Three-dimensional low-frequency broadband seismic metamaterial tree based on tree bionics |
-
2011
- 2011-12-28 CN CN2011205559860U patent/CN202402557U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518742A (en) * | 2011-12-28 | 2012-06-27 | 中国科学技术大学 | Compression bar type passive low-frequency three-dimensional vibration isolator |
| CN102518742B (en) * | 2011-12-28 | 2013-09-11 | 中国科学技术大学 | Compression bar type passive low-frequency three-dimensional vibration isolator |
| CN104912997B (en) * | 2014-03-13 | 2017-04-12 | 住友理工株式会社 | Vibration isolation device |
| CN104632985A (en) * | 2014-12-10 | 2015-05-20 | 兰州大学 | Passive compression type self-adaption vibration damper |
| CN104632985B (en) * | 2014-12-10 | 2016-08-31 | 兰州大学 | passive compression adaptive damping device |
| CN104879435A (en) * | 2015-05-06 | 2015-09-02 | 常州大学 | Self-adaptive equal rigidity vibration isolator based on air floatation and electric combination three-dimensional decoupling |
| CN113048191A (en) * | 2021-03-11 | 2021-06-29 | 哈尔滨工程大学 | Three-dimensional low-frequency broadband seismic metamaterial tree based on tree bionics |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120829 Effective date of abandoning: 20130911 |
|
| RGAV | Abandon patent right to avoid regrant |