CN212078864U - Three-dimensional vibration isolation platform with horizontal and vertical self-adaptive rigidity characteristics - Google Patents
Three-dimensional vibration isolation platform with horizontal and vertical self-adaptive rigidity characteristics Download PDFInfo
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- CN212078864U CN212078864U CN202020174552.5U CN202020174552U CN212078864U CN 212078864 U CN212078864 U CN 212078864U CN 202020174552 U CN202020174552 U CN 202020174552U CN 212078864 U CN212078864 U CN 212078864U
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Abstract
The utility model relates to a take three-dimensional vibration isolation platform of level and vertical self-adaptation rigidity characteristic, its purpose provides a take three-dimensional vibration isolation platform of level and vertical self-adaptation rigidity characteristic, can realize three-dimensional vibration isolation and have better vibration isolation effect and higher safety guarantee. A three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics comprises: the platform board, rubber support, pre-compaction spring assembly and vertical accurate zero rigidity support. The vertical quasi-zero stiffness support can exert the vibration isolation effect with self-adaptive stiffness in the vertical direction, and provides larger static stiffness when being loaded by vertical gravity, so that the vertical quasi-zero stiffness support has larger vertical bearing capacity; the system is excited by external vibration, and when the system performs reciprocating vibration near a static equilibrium position, the support provides smaller dynamic stiffness, so that the system has a better vibration isolation effect.
Description
Technical Field
The utility model relates to a vibration and noise control technical field particularly, relates to a take three-dimensional vibration isolation platform of level and vertical self-adaptation rigidity characteristic.
Background
In recent years, vibration control techniques with adaptive characteristics have become a focus of research in the academic and engineering community. Adaptive vibration control refers to the change of dynamic characteristics of the system along with different responses, which is beneficial to achieve better control effect. The adaptive technology is divided into a semi-active adaptive technology and a passive adaptive technology according to whether external energy is needed or not.
In the field of vibration isolation of building structures and large-scale equipment, mutual contradictions between the bearing capacity and the vibration isolation effect of a vertical vibration isolation system exist in vertical vibration isolation. The realization of a large load-bearing capacity of a vertical vibration isolation system usually requires that the system provide a large vertical stiffness, otherwise a large static displacement and a significant rolling and overturning phenomenon are caused. However, as can be seen from the basic vibration isolation principle, the greater the stiffness, the greater the vibration isolation initial frequency, and the poorer the vibration isolation effect.
Similarly, in the horizontal vibration isolation direction, there is a contradiction between the restoring rigidity and the vibration isolation effect. If the restoring rigidity is too small, the restoring force of the system is insufficient, and the system is easy to generate overlarge displacement and damage under the vibration action; and increasing the restoring stiffness reduces the vibration isolation effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the weak point among the prior art, provide a take three-dimensional vibration isolation platform of level and vertical self-adaptation rigidity characteristic, can realize three-dimensional vibration isolation and have better vibration isolation effect and higher safety guarantee.
The utility model aims at realizing through the following technical scheme:
a three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics comprises: the platform board, rubber support, pre-compaction spring assembly and vertical accurate zero rigidity support.
The deck plate is bolted to an upper target isolation structure.
The rubber support sets up under the landing slab, include: the laminated rubber bearing is formed by alternately bonding a rubber layer and a steel plate layer.
The pre-pressing spring set comprises: two universal joint outer junction plates, two universal joints, two universal joint inner junction plates, pre-compaction coil spring and location axle, the location axle sets up pre-compaction coil spring's inside, a universal joint inner junction plate is respectively connected at the both ends of location axle, the outer end of universal joint inner junction plate is connected the universal joint, the outer end of universal joint is connected the universal joint outer junction plate, the outer end of universal joint outer junction plate is connected to landing slab/basis.
The vertical quasi-zero stiffness mount comprises: go up and make board, make the board down and set up at last and make the spring assembly between the board down, spring assembly includes belleville spring group and sets up the coil spring of the inside below at belleville spring group go up and be equipped with downwardly extending's linear bearing on making the board, the guiding axle is connected go up and make between board and the lower board and one end inserts can follow among the linear bearing carries out vertical motion.
The utility model provides a take three-dimensional vibration isolation platform of horizontal and vertical self-adaptation rigidity characteristic adopts the mode of rubber support additional combination pre-compaction spring assembly to carry out horizontal vibration isolation, and wherein pre-compaction spring assembly mainly provides the variable stiffness for the system for the level, and when vibration isolation platform horizontal displacement is less, pre-compaction spring assembly is stressed and is provided negative stiffness, impels the platform to produce the displacement, and then realizes better vibration isolation effect; when the horizontal displacement of the vibration isolation platform is large, the pre-pressing spring group is pulled to provide positive rigidity, the excessive displacement of the platform is limited, and the vibration isolation platform is prevented from being damaged by displacement. Meanwhile, the vertical quasi-zero stiffness support can exert the vibration isolation effect with self-adaptive stiffness in the vertical direction, and provides larger static stiffness and has larger vertical bearing capacity when being loaded by vertical gravity; the system is excited by external vibration, and when the system performs reciprocating vibration near a static equilibrium position, the support provides smaller dynamic stiffness, so that the system has a better vibration isolation effect.
The utility model provides a take three-dimensional vibration isolation platform of level and vertical self-adaptation rigidity characteristic provides self-adaptation rigidity for horizontal vibration isolation system to the geometric nonlinearity that utilizes pre-compaction coil spring group at the level, forms the vertical vibration isolation system that has self-adaptation rigidity characteristic at the spring assembly of vertical adoption belleville spring and the combination of spiral linear spring, has adopted linear bearing and guiding axle complex mode to carry out the level to with vertical motion decoupling zero.
The disc spring group is formed by combining a plurality of disc springs in an involutory mode, an outer loading ring is arranged between the joints of the outer ends of two adjacent disc springs, and an inner loading ring is arranged between the joints of the inner ends of two adjacent disc springs.
Wherein, go up and make the board and include: go up and make fixed top dish of board, go up and make board loading ring and last coil spring constant head tank, it sets up to go up to make board loading ring the below middle part of making the fixed top dish of board is used for loading belleville spring group, it sets up to go up the coil spring constant head tank go up the below of making board loading ring be used for right coil spring loads and fixes the position of spring group.
The upper working plate fixing top disc is provided with a linear bearing mounting hole for fixing the linear bearing.
The lower working plate is provided with a spiral spring positioning rod and a lower spiral spring positioning groove for fixing the position of the spiral spring. Furthermore, the lower working plate is also provided with a lower working plate loading ring for loading the spring group.
Preferably, the inner end of the inner universal joint connecting plate is provided with a positioning groove, and two ends of the positioning shaft are respectively inserted into the positioning grooves of the corresponding inner universal joint connecting plates.
The outer end of the inner universal joint connecting plate is connected with the inner end of the universal joint in a fastening and clamping mode through an end handle, and the inner end of the outer universal joint connecting plate is clamped at the outer end of the universal joint in a fastening and clamping mode through the end handle.
Wherein, the outer end of the universal joint outer connecting plate is connected with the platform plate/foundation through a bolt.
Preferably, the laminated rubber mount may also be provided with an intermediate lead core to provide a level of energy dissipation capability, depending on the application scenario.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of a preferred embodiment of the three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics according to the present invention.
FIG. 2a is a schematic structural view of the rubber mount of the embodiment shown in FIG. 1;
fig. 2b is a schematic cross-sectional structure view of the rubber mount in fig. 2 a.
Fig. 3a is a schematic structural view of the pre-compression spring set of the embodiment shown in fig. 1.
Fig. 3b is a schematic cross-sectional view of the pre-compression spring set in fig. 3 a.
Fig. 4a is a schematic structural view of the vertical quasi-zero stiffness mount of the embodiment shown in fig. 1.
Fig. 4b is a schematic cross-sectional structure view of the vertical quasi-zero stiffness mount in fig. 4 a.
Fig. 5a is a schematic structural view of a plate on the vertical quasi-zero stiffness support of the embodiment shown in fig. 1.
Fig. 5b is a schematic cross-sectional structure view of the upper working plate of the vertical quasi-zero stiffness support in fig. 5 a.
FIG. 6a is a schematic structural view of the lower vertical quasi-zero stiffness pedestal making plate of the embodiment shown in FIG. 1.
Fig. 6b is a schematic cross-sectional view of the lower working plate of the vertical quasi-zero stiffness support in fig. 6 a.
FIG. 7a is a schematic diagram of the construction of the vertical quasi-zero stiffness support disc spring stack of the embodiment shown in FIG. 1.
FIG. 7b is a schematic cross-sectional view of the vertical quasi-zero stiffness support belleville spring stack of FIG. 7 a.
Wherein: 1, a platform plate; 2, a rubber support; 3, a vertical quasi-zero rigidity support; 4, prepressing the spring set; 5, connecting the upper connecting plate of the rubber support; 6 laminating a rubber support; 7a rubber layer; 8 steel plate layers; 9 universal joint external connection board; 10 a universal joint; 11 a gimbal inner connection plate; 12 pre-pressing the spiral spring; 13 positioning the shaft; 14, making a plate; 15 a disc spring; 16 outer load ring; 17 an inner load ring; 18 a coil spring; 19, making a plate below; 20 linear bearings; 21 a guide shaft; 22, making a plate loading ring; 23, a spiral spring positioning groove is arranged; 24 linear bearing mounting holes; 25, making the upper surface of the plate; 26, making a plate loading ring; 27 helical spring locating rods; 28 lower spiral spring positioning groove.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments, but the present embodiment is not limited to the present invention, and all similar structures and similar variations thereof adopted by the present invention should be included in the protection scope of the present invention.
The three-dimensional vibration isolation platform shown in fig. 1 is composed of a platform plate 1, a rubber support 2, a vertical quasi-zero stiffness support 3 and a pre-pressing spring group 4. The platform plate 1 is bolted to an upper target vibration isolation structure (not shown). In the embodiment, as shown in the figure, four groups of mutually matched rubber supports 2, vertical quasi-zero stiffness supports 3 and four groups of pre-pressing spring groups 4 are adopted. Fig. 1 shows a preferred embodiment of the present invention, and in other embodiments, the number and the arrangement manner of the rubber mount 2, the vertical quasi-zero stiffness mount 3, and the pre-compression spring set 4 may vary according to the requirement of the upper structure for vibration isolation.
Referring to fig. 2a and 2b, the rubber mount 2 is composed of a rubber mount upper connection plate 5 and a laminated rubber mount 6, and the rubber mount upper connection plate 5 is connected to the platen plate 1 by bolts. As shown in fig. 2b, the laminated rubber mount 6 is constructed by alternately bonding rubber layers 7 and steel plate layers 8 for receiving the upper structure weight, and is deformed horizontally by the shear deformation of the rubber layers 7 and provides a restoring force.
Referring to fig. 3a and 3b, the pre-pressing spring set 4 is composed of two gimbal outer connecting plates 9, two gimbals 10, two gimbal inner connecting plates 11, a pre-pressing coil spring 12 and a positioning shaft 13. Location axle 13 sets up in the inside of pre-compaction coil spring 12, the inner of gimbal in-connection board 11 is equipped with the constant head tank, the both ends of location axle 13 are inserted respectively and are established in the constant head tank of corresponding gimbal in-connection board 11, the inner of gimbal 10 is connected through end handle fastening centre gripping in gimbal in-connection board 11's outer end, the inner of gimbal outer joint board 9 passes through end handle fastening centre gripping in the outer end of gimbal 10, the outer end of gimbal outer joint board 9 passes through bolt and landing slab 1 or basic connection. In this way, the rotation of the gimbal 10 itself can ensure that the end of the pre-compression spring set 4 can rotate with any degree of freedom. The pre-pressing spiral spring 12 acts between the two universal joint inner connecting plates 11, and at an initial position, the pre-pressing spring group 4 keeps a vertical state, and the pre-pressing spiral spring 12 has pre-pressing force; as the platform plate moves horizontally, the pre-pressing spring set 4 changes from a vertical state to an inclined state. Due to the geometric deformation of the pre-pressing spring group 4, under the condition of small displacement, the pre-pressing spring group 4 provides negative stiffness for the platform plate 1 to enable the platform plate to leave the initial position; in case of large displacement, the platform plate 1 is provided with positive stiffness urging it back to its initial position, thereby enabling the horizontal vibration isolation system to have adaptive stiffness characteristics. The positioning shaft 13 is used for ensuring that the upper part and the lower part of the pre-pressing spring set 4 can be deformed in a coordinated manner.
As shown in fig. 4a and 4b, the vertical quasi-zero stiffness support 3 is composed of an upper acting plate 14, a disc spring 15, an outer loading ring 16, an inner loading ring 17, a coil spring 18, a lower acting plate 19, a linear bearing 20 and a guide shaft 21. As shown in FIGS. 5a and 5b, the upper working plate 14 includes an upper working plate holding top plate, an upper working plate loading ring 22 and an upper coil spring positioning slot 23. The upper working plate fixing top plate is provided with a linear bearing mounting hole 24 for fixing the linear bearing 20, and an upper working plate loading ring 22 is arranged in the middle part below the upper working plate fixing top plate for loading the disc spring group. An upper coil spring positioning groove 23 is provided below the upper plate loading ring 22 to load the coil spring 18 and fix the positions of the coil spring 18 and the disc spring 15. As shown in fig. 6a and 6b, the lower plate 19 has a coil spring positioning rod 27 and a lower coil spring positioning groove 28 for fixing the position of the coil spring 18, the coil spring positioning rod 27 can prevent the coil spring 18 from being deformed unstably, and the lower coil spring positioning groove 28 is used for loading the coil spring 18. The lower plate 14 is also provided with a lower plate loading ring 26 for loading the disc spring stack and the coil springs 18, the coil springs 18 being located inside the disc spring stack. Referring to fig. 7a and 7b, the disc spring assembly is formed by combining a plurality of disc springs 15, an outer loading ring 16 is arranged between the joints of the outer ends of two adjacent disc springs, and an inner loading ring 17 is arranged between the joints of the inner ends of two adjacent disc springs 15. By alternately stacking the outer loading ring 16 and the inner loading ring 17, the disc spring is combined for use, so that the mechanical property of the spring group can be flexibly adjusted.
The upper working plate 14, the disc spring 15, the outer loading ring 16, the inner loading ring 17, the spiral spring 18 and the lower working plate 19 form a vertical quasi-zero stiffness vibration isolation part; the linear bearing 20 and the guide shaft 21 constitute a motion decoupling portion. The guide shaft 21 is connected between the upper working plate 14 and the lower working plate 19 and constrained by the downward linear bearing 20 installed in the linear bearing installation hole 24, so that the guide shaft 21 can smoothly perform vertical motion without horizontal motion, and further, the horizontal motion and the vertical motion of the vibration isolation system are decoupled. The vertical quasi-zero stiffness vibration isolation part mainly utilizes the nonlinear elastic deformation characteristic of the disc spring 15 and combines the parallel stress of the spiral spring 18, thereby forming a vertical quasi-zero stiffness vibration isolation system with the stiffness self-adaptive characteristic.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention in any way. Any changes or modifications of the above-described embodiments, which may be made by those skilled in the art based on the above-described disclosure, should be considered as equivalent effective embodiments, and all fall within the scope of the protection of the present invention.
Claims (10)
1. The utility model provides a take three-dimensional vibration isolation platform of level and vertical self-adaptation rigidity characteristic which characterized in that includes:
a platform plate connected with the upper target vibration isolation structure in a bolt connection manner;
the rubber support sets up under the landing slab, include: the laminated rubber bearing is formed by alternately bonding rubber layers and steel plate layers;
pre-compaction spring assembly includes: the positioning device comprises two universal joint outer connecting plates, two universal joints, two universal joint inner connecting plates, a prepressing spiral spring and a positioning shaft, wherein the positioning shaft is arranged inside the prepressing spiral spring; and
vertical quasi-zero rigidity support includes: go up and make board, make the board down and set up at last and make the spring assembly between the board down, spring assembly includes belleville spring group and sets up the coil spring of the inside below at belleville spring group go up and be equipped with downwardly extending's linear bearing on making the board, the guiding axle is connected go up and make between board and the lower board and one end inserts can follow among the linear bearing carries out vertical motion.
2. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the disc spring group is formed by combining a plurality of disc springs, an outer loading ring is arranged between the joints of the outer ends of two adjacent disc springs, and an inner loading ring is arranged between the joints of the inner ends of two adjacent disc springs.
3. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the upper board comprises: go up and make fixed top dish of board, go up and make board loading ring and last coil spring constant head tank, it sets up to go up to make board loading ring the below middle part of making the fixed top dish of board is used for loading belleville spring group, it sets up to go up the coil spring constant head tank go up the below of making board loading ring be used for right coil spring loads and fixes the position of spring group.
4. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 3, wherein: and the upper working plate fixing top disc is provided with a linear bearing mounting hole for fixing the linear bearing.
5. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the lower working plate is provided with a spiral spring positioning rod and a lower spiral spring positioning groove for fixing the position of the spiral spring.
6. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 5, wherein: the lower working plate is also provided with a lower working plate loading ring for loading the spring group.
7. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the inner end of the inner universal joint connecting plate is provided with a positioning groove, and two ends of the positioning shaft are respectively inserted into the positioning grooves of the corresponding inner universal joint connecting plates.
8. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the outer end of the inner universal joint connecting plate is connected with the inner end of the universal joint in a fastening and clamping mode through an end handle, and the inner end of the outer universal joint connecting plate is clamped with the outer end of the universal joint in a fastening and clamping mode through the end handle.
9. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the outer end of the universal joint outer connecting plate is connected with the platform plate/foundation through a bolt.
10. The three-dimensional vibration isolation platform with horizontal and vertical adaptive stiffness characteristics of claim 1, wherein: the laminated rubber support is also provided with a middle lead core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020174552.5U CN212078864U (en) | 2020-02-15 | 2020-02-15 | Three-dimensional vibration isolation platform with horizontal and vertical self-adaptive rigidity characteristics |
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| CN202020174552.5U CN212078864U (en) | 2020-02-15 | 2020-02-15 | Three-dimensional vibration isolation platform with horizontal and vertical self-adaptive rigidity characteristics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114952744A (en) * | 2022-07-05 | 2022-08-30 | 广东工业大学 | Voice coil motor direct-drive type active vibration isolation and leveling integrated platform |
| CN115324205A (en) * | 2022-09-15 | 2022-11-11 | 株洲时代新材料科技股份有限公司 | Quasi-zero-rigidity vertical shock isolator, design method thereof and three-dimensional shock isolation device |
-
2020
- 2020-02-15 CN CN202020174552.5U patent/CN212078864U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114952744A (en) * | 2022-07-05 | 2022-08-30 | 广东工业大学 | Voice coil motor direct-drive type active vibration isolation and leveling integrated platform |
| CN115324205A (en) * | 2022-09-15 | 2022-11-11 | 株洲时代新材料科技股份有限公司 | Quasi-zero-rigidity vertical shock isolator, design method thereof and three-dimensional shock isolation device |
| CN115324205B (en) * | 2022-09-15 | 2024-01-02 | 株洲时代新材料科技股份有限公司 | Quasi-zero-stiffness vertical shock isolator, design method thereof and three-dimensional shock isolation device |
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