CN113586639A - Novel insect-imitating low-frequency vibration isolation structure - Google Patents
Novel insect-imitating low-frequency vibration isolation structure Download PDFInfo
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- CN113586639A CN113586639A CN202110757790.8A CN202110757790A CN113586639A CN 113586639 A CN113586639 A CN 113586639A CN 202110757790 A CN202110757790 A CN 202110757790A CN 113586639 A CN113586639 A CN 113586639A
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- 238000002955 isolation Methods 0.000 title claims abstract description 27
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 13
- 239000010432 diamond Substances 0.000 claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 10
- 241000238631 Hexapoda Species 0.000 claims abstract description 3
- 241001674044 Blattodea Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011664 nicotinic acid Substances 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
- F16F3/04—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction composed only of wound springs
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Abstract
The invention belongs to the field of mechanical vibration control. Aims to provide an insect-imitating low-frequency vibration isolation structure. The structure not only can adjust the bearing capacity and rigidity of the vibration isolator, but also can realize broadband and low-frequency vibration isolation through nonlinear rigidity and damping. The technical scheme is as follows: imitative insect low frequency vibration isolation structure, its characterized in that: the low-frequency vibration isolation structure comprises an upper base plate and a lower base plate which realize relative motion in the vertical direction through a vertical direction guide structure, a series connection diamond structure which is arranged between the upper base plate and the lower base plate and applies restoring force, and a horizontal direction guide structure which is connected in series on the series connection diamond structure so as to increase nonlinear inertia force and nonlinear damping force on the upper base plate and the lower base plate.
Description
Technical Field
The invention belongs to the field of mechanical vibration control, and particularly relates to a novel insect-imitating low-frequency vibration isolation structure.
Background
The response of high, precise and sharp equipment and devices in the fields of aerospace, mechanical engineering, ships and naval vessels and the like in the fields of "going to the sky", "going to the ground" and "going to the sea" in a complex dynamic environment has the bottleneck problems of wide frequency band, strong randomness, difficulty in control and the like, so that the development of a low-frequency vibration isolation structure with wide-frequency-band vibration isolation capability is always a research hotspot in the field.
The traditional vibration isolator cannot give consideration to both vibration isolation bandwidth and static supporting capacity, and the application of the traditional vibration isolator in the fields is limited. In recent years, nonlinear vibration isolation devices with broadband response and high robustness have been widely researched and applied. The bionic vibration isolation structure is a new research direction developed by learning from the buffering capacity of animals walking at high speed. Currently, the bionic vibration isolation research mainly focuses on the exoskeleton structure of animals.
The cockroach can change the body form rapidly and adapt to the external environment. Cockroaches run rapidly using a hard, articulated exoskeleton at speeds approaching 1.5ms-1. The strength of the exoskeleton enables the cockroaches to bear the force 300 times of the weight and to pass through the smallest cracks and damage close to 900 times of the weight, so that the body structure of the cockroaches has a strong energy absorption effect and can be used in the field of vibration isolation. The invention develops a new method, is inspired by the quick movement and the super-strong pressure capacity of cockroaches, invents a novel insect-imitating low-frequency vibration isolation structure, can adapt to a complex dynamic environment, and can maintain the high-performance vibration isolation characteristic according to the change of a geometric configuration.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides an insect-imitating low-frequency vibration isolation structure. The structure not only can adjust the bearing capacity and rigidity of the vibration isolator, but also can realize broadband and low-frequency vibration isolation through nonlinear rigidity and damping.
The technical scheme provided by the invention is as follows:
imitative insect low frequency vibration isolation structure, its characterized in that: the low-frequency vibration isolation structure comprises an upper base plate and a lower base plate which realize relative motion in the vertical direction through a vertical direction guide structure, a series connection diamond structure which is arranged between the upper base plate and the lower base plate and applies restoring force, and a horizontal direction guide structure which is connected in series on the series connection diamond structure so as to increase nonlinear inertia force and nonlinear damping force on the upper base plate and the lower base plate.
The vertical direction guide structure comprises four vertical guide rods which are connected in parallel and are respectively positioned between the upper base plate and the lower base plate in a vertically movable manner through bearings; when the vibration isolation structure vibrates, the horizontal shaking of the vibration isolation structure can be reduced.
The series rhombus structure comprises a large rhombus and two small rhombuses connected in series with the large rhombus; the side length of the large rhombus is l, the upper diagonal and the lower diagonal of the large rhombus are respectively connected to the upper bottom plate and the lower bottom plate through hinges, the two small rhombuses are respectively connected to the two sides of the lower side of the large rhombus, and the side length of each side is l/4;
one side of each small rhombus is a part of one side of the connected large rhombus; and one side is 1/2 in length, one end of the side is hinged to the middle point of one side of the large diamond, and the middle point of the side is a hinged point connected with the adjacent side.
Springs are respectively and horizontally arranged on the diagonal lines of the large rhombus and the two small rhombuses; a spring is also horizontally mounted between the other end of the side of length 1/2 and the hinge.
The horizontal direction guide structure comprises a horizontal guide rod transversely inserted and fixed on the lower hinge, and sliding blocks which are respectively in sliding fit with the horizontal guide rod and hinged with the other end of the side with the length of 1/2. When the sliding block works, the large diamond deformation drives the small diamond deformation, so that the sliding block slides along the guide rail in the horizontal direction. The slider is as inertia element, dissipates the vibration of vertical direction through the inertia slider of horizontal direction, and adjustable slider's weight reaches better vibration isolation effect simultaneously.
The slider is provided with a threaded hole, so that load can be increased to change nonlinear inertia force and nonlinear damping force.
The large rhombus and the small rhombus are formed by hinging rod pieces with different lengths.
The invention has the beneficial effects that:
1. the bionic structure adjusts the nonlinear rigidity by changing the structural parameters so as to achieve better vibration isolation effect. The load capacity and working range can also be designed according to the length of the rod, initial angle, spring rate, slider weight.
2. The introduction of the inertia sliding block in the horizontal direction provides nonlinear damping, and the resonance frequency and the peak value are greatly reduced.
3. The invention has simple and compact structure, and is safe and reliable.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a schematic front view of the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a series diamond structure according to an embodiment of the present invention.
Fig. 4 is a perspective view of a vertical direction guide structure according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a vertical direction guide structure according to an embodiment of the present invention.
Fig. 6 is a perspective view of a horizontal direction guide structure according to an embodiment of the present invention.
Fig. 7 is a front view of a horizontal direction guide structure according to an embodiment of the present invention.
Fig. 8 is a schematic sectional view a-a of fig. 7.
Reference numerals: 1. an upper hinge; 2. a spring; 3. a rod member; 4. an upper base plate; 5. a vertical guide rod; 6. a sliding bearing; 7. a lower base plate; 8. a bolt; 9. a nut; 10. a slider; 11. a lower hinge; 12. a threaded hole; 13. a horizontal guide rod; 14. a bearing; 15. and (5) tightening the screw.
Detailed Description
The following further description is made with reference to the embodiments shown in the drawings.
The insect-imitating low-frequency vibration isolation structure shown in the attached drawing comprises an upper base plate and a lower base plate which realize relative motion in the vertical direction through a vertical direction guide structure, a series connection diamond structure which is arranged between the upper base plate and the lower base plate and applies restoring force to the upper base plate and the lower base plate, and a horizontal direction guide structure which is connected in series on the series connection diamond structure so as to increase nonlinear inertia force and nonlinear damping force to the upper base plate and the lower base plate.
As shown in fig. 3, the series diamond structure comprises a spring 2 and a rod 3. The springs 2 and the rod pieces 3 are arranged between the upper hinge 1 and the lower hinge 11, the rod pieces 3 with different lengths are hinged to form rhombuses with different sizes, and the springs 2 are arranged on the diagonal lines of the rhombuses and are all horizontally arranged (five springs are shown in the figure).
In the rhombuses with different sizes, the side length of one large rhombus is l, the upper diagonal and the lower diagonal of the large rhombus are respectively connected to the upper bottom plate and the lower bottom plate through hinges (an upper hinge 1 and a lower hinge 11), the two small rhombuses are respectively connected to the two sides of the lower side of the large rhombus, and the side length of each side is l/4.
One of the four sides of each small rhombus directly utilizes a part of one side of the connected large rhombus; the length of one side is 1/2, one end of the side is hinged on the middle point of one side of the large diamond, the middle point of the side is used as a hinge point connected with the adjacent side, the other end of the side is hinged with the sliding block, and a spring is arranged between the other end of the side and the lower hinge; the other two sides directly adopt shorter rod pieces.
As shown in fig. 4 and 5, the vertical direction guide structure includes an upper base plate 4, vertical guide rods 5, slide bearings 6, lower base plates 7, 8, bolts, and nuts 9. The sliding bearing 6 is fixed on the lower bottom plate through a bolt 8 and a nut 9, one end of the vertical guide rod 5 is fixed on the upper bottom plate 4, and the other end of the vertical guide rod vertically penetrates through the sliding bearing 6 downwards so as to realize the vibration of the upper bottom plate 1 in the vertical direction.
As shown in fig. 6 and 7, the horizontal direction guide structure includes a slider 10 formed with a threaded hole 12, and a horizontal guide bar 13. The horizontal guide rod passes through two sliders and a lower hinge (the two sliders are positioned at two sides of the lower hinge), the lower hinge is fixed with the horizontal guide rod through a set screw 15, and the slider 10 can slide on the horizontal guide rod 13 through a bearing 14. The threaded hole on the sliding block can be used for increasing load and changing nonlinear inertia force and nonlinear damping force.
The working principle of the invention is as follows:
mounting the invention on a mechanical device: the lower plate 11 is fixed to the mechanical equipment and applies vibration to the upper plate 1. When vibration occurs, the upper bottom plate moves up and down to drive the series connection rhombus structure to deform. The vertical direction is as follows: the upper plate is vibrated in the vertical direction along the slide bearing 6 by the vertical guide 5. Horizontal direction: the series rhombus structure deformation drives the sliding block 10 to slide along the horizontal guide rod 13, and the sliding block 10 is used as an inertia device, and the load can be increased through the threaded hole 12 of the sliding block to change the load capacity and the working range.
Finally, it should be noted that the above-mentioned list is only a specific embodiment of the present invention. It is obvious that the present invention is not limited to the above embodiments, but many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention. .
Claims (7)
1. Imitative insect low frequency vibration isolation mechanism, its characterized in that: the low-frequency vibration isolation structure comprises an upper base plate (4) and a lower base plate (7) which realize relative motion in the vertical direction through a vertical direction guide mechanism, a series connection diamond-shaped mechanism which is arranged between the upper base plate and the lower base plate and applies restoring force to the upper base plate and the lower base plate, and a horizontal direction guide mechanism which is connected in series on the series connection diamond-shaped mechanism so as to increase nonlinear inertia force and nonlinear damping force to the upper base plate and the lower base plate.
2. The insect-imitating low-frequency vibration isolating mechanism according to claim 1, wherein: the vertical direction guide mechanism comprises four vertical guide rods (5) which are connected in parallel and are respectively positioned between the upper base plate and the lower base plate in a vertically movable manner through bearings.
3. The insect-imitating low-frequency vibration isolating mechanism according to claim 2, wherein: the series rhombus structure comprises a large rhombus and two small rhombuses which are connected in parallel and then connected with the large rhombus in series; the side length of the large rhombus is l, the upper diagonal and the lower diagonal of the large rhombus are respectively connected to the upper bottom plate and the lower bottom plate through hinges, the two small rhombuses are respectively connected to the two sides of the lower side of the large rhombus, and the side length of each side is l/4;
one side of each small rhombus is a part of one side of the connected large rhombus; and one side is 1/2 in length, one end of the side is hinged to the middle point of one side of the large diamond, and the middle point of the side is a hinged point connected with the adjacent side.
4. The insect-imitating low-frequency vibration isolating mechanism according to claim 3, wherein: springs (2) are respectively and horizontally arranged on the diagonal lines of the large rhombus and the two small rhombuses; a spring is also horizontally mounted between the other end of the side of length 1/2 and the hinge.
5. The insect-imitating low-frequency vibration isolating mechanism according to claim 4, wherein: the horizontal direction guide mechanism comprises a horizontal guide rod (13) which is transversely inserted and fixed on the lower hinge, and sliding blocks (10) which are respectively in sliding fit with the horizontal guide rod and hinged with the other end of the side with the length of 1/2.
6. The insect-imitating low-frequency vibration isolating mechanism according to claim 5, wherein: the slider is provided with a threaded hole (12) which can increase the load to change the nonlinear inertia force and the nonlinear damping force.
7. The insect-imitating low-frequency vibration isolating mechanism according to claim 5, wherein: the large rhombus and the small rhombus are formed by hinging rod pieces with different lengths.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110757790.8A CN113586639A (en) | 2021-07-05 | 2021-07-05 | Novel insect-imitating low-frequency vibration isolation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110757790.8A CN113586639A (en) | 2021-07-05 | 2021-07-05 | Novel insect-imitating low-frequency vibration isolation structure |
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| CN113586639A true CN113586639A (en) | 2021-11-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810928A (en) * | 2022-05-20 | 2022-07-29 | 浙江理工大学 | Hexagonal geometric amplification type magnetic suspension low-frequency vibration isolation structure |
| CN115013463A (en) * | 2022-05-09 | 2022-09-06 | 景兴建 | Multi freedom vibration isolation mechanism |
-
2021
- 2021-07-05 CN CN202110757790.8A patent/CN113586639A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013463A (en) * | 2022-05-09 | 2022-09-06 | 景兴建 | Multi freedom vibration isolation mechanism |
| CN114810928A (en) * | 2022-05-20 | 2022-07-29 | 浙江理工大学 | Hexagonal geometric amplification type magnetic suspension low-frequency vibration isolation structure |
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