CN211976317U - Positive and negative rigidity adjustable quasi-zero rigidity vibration isolation platform - Google Patents
Positive and negative rigidity adjustable quasi-zero rigidity vibration isolation platform Download PDFInfo
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- CN211976317U CN211976317U CN202020064761.4U CN202020064761U CN211976317U CN 211976317 U CN211976317 U CN 211976317U CN 202020064761 U CN202020064761 U CN 202020064761U CN 211976317 U CN211976317 U CN 211976317U
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- 238000002955 isolation Methods 0.000 title claims abstract description 49
- 238000009434 installation Methods 0.000 claims abstract description 6
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- 230000003068 static effect Effects 0.000 abstract description 6
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Abstract
The utility model provides a quasi-zero stiffness vibration isolation platform with adjustable positive and negative stiffness, which relates to the technical field of vibration isolators and comprises a platform bracket, a first vibration isolator, a second vibration isolator, a movable platform and an installation head, wherein the upper side and the lower side in front of the platform bracket are movably connected with the first vibration isolator, the upper side and the lower side in back of the platform bracket are movably connected with the second vibration isolator, and the second vibration isolator and the first vibration isolator are arranged at intervals, a positive stiffness characteristic is vertically generated by a first spring, a negative stiffness characteristic is generated by the inclined position of a second spring, the positive stiffness characteristic and the negative stiffness characteristic between the first spring and the second spring are mutually connected in parallel, when the first spring and the second spring are in a balance point, the quasi-zero stiffness characteristic is generated, the non-linear vibration isolation effect is achieved on a counter-acting platform, the problem that the stiffness is reduced, the static stability of the vibration isolator is improved, and a good vibration isolation effect is achieved when the high-precision instrument is used.
Description
Technical Field
The utility model relates to a isolator technical field, more specifically the theory that says so relates to and is a positive and negative rigidity adjustable accurate zero rigidity vibration isolation platform.
Background
Vibration isolation is an important means for solving the problem of engineering vibration, in the current large amount of engineering practice, a linear vibration isolator is generally adopted, the linear vibration isolation theory can know that the vibration isolation performance is achieved only when the excitation frequency of a system is larger than the inherent frequency ratio of the vibration isolator, for some precise instruments such as high-precision machine tools and precise instrument equipment and high-grade scientific laboratory equipment, the low-frequency vibration has larger influence on the precision, if a linear vibration isolation measure is adopted, the rigidity of the vibration isolator is inevitably reduced so as to realize low-frequency vibration isolation, the static stability of the vibration isolator is reduced, the vibration isolation effect of quasi-zero rigidity cannot be achieved, the vibration isolation effect is poor when the high-precision instrument equipment is used, further innovation needs to be made on the basis, and a quasi-zero rigidity vibration isolation platform with adjustable positive and negative rigidity is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving and adopting linear vibration isolation measure, thereby will reduce the rigidity of isolator and realize the low frequency vibration isolation, this static stability that also can cause the isolator reduces, reaches the vibration isolation effect of quasi-zero rigidity for the poor technical problem of vibration isolation effect provides a quasi-zero rigidity vibration isolation platform of positive and negative rigidity adjustable when high accuracy instrument equipment uses.
In order to achieve the above object, the utility model provides a following technical scheme: a quasi-zero stiffness vibration isolation platform with adjustable positive and negative stiffness comprises a platform support, a first vibration isolator, a second vibration isolator, a moving platform and an installation head, wherein the first vibration isolator is movably connected to the upper side and the lower side of the front of the platform support, the second vibration isolator is movably connected to the upper side and the lower side of the rear of the platform support, the second vibration isolator and the first vibration isolator are arranged at intervals, the moving platform is movably connected to the upper side of the second vibration isolator and the upper side of the first vibration isolator, and the installation head is embedded into the upper side and the lower side of the bottom surface of the moving platform;
the platform support comprises a support rod traction ball and fixed bases, the support rod traction ball is welded above and below the inner side of the platform support, and the fixed bases are embedded in the bottom of the platform support;
the first vibration isolator comprises a first spring, first traction balls, a first mounting groove, first adjusting rods and first jacking rods, wherein the first spring is embedded in the left side and the right side of the first vibration isolator and in the middle of the lower part of the first vibration isolator, the first traction balls are embedded in the inner sides of the first spring, the first mounting groove is embedded in the middle of the top of the first vibration isolator on the upper side, the first adjusting rods are embedded in the left side and the right side of the first vibration isolator, the first adjusting rods are located in the inner sides of the first spring, and the first jacking rods are embedded in the left side and the right side of the lower part of the first vibration isolator;
the second isolator includes second spring, second traction ball, second mounting groove, second regulation pole and second top force pole, the equal embedding of second spring sets up in the second isolator left and right sides, the equal embedding of second traction ball sets up at the second spring inboardly, the embedding of second mounting groove sets up in the middle of upside second isolator top, the equal embedding of second regulation pole sets up in the second isolator left and right sides, and the second regulation pole all is located the second spring inboardly, the equal embedding of second top force pole sets up the left and right sides in second isolator below.
Preferably: the sizes of the support rod traction ball, the first traction ball and the second traction ball are all consistent, and the support rod traction ball, the first traction ball and the second traction ball are respectively embedded between the first spring and the second spring.
Preferably: the first spring, the second spring, the first vibration isolator and the second vibration isolator are arranged in a triangular shape.
Preferably: the first springs are arranged in a vertical structure and are positive stiffness elements.
Preferably: the second spring is arranged in an inclined shape structure and is a negative stiffness element.
Preferably: and movable grooves are formed between the first adjusting rod and the second adjusting rod and between the first vibration isolator and the second vibration isolator, and the middle parts of the outer ends of the first adjusting rod and the second adjusting rod are embedded into the first traction ball and the second traction ball.
Preferably: first top force pole and second top force pole all are the slope column structure setting that inclines upwards, and first top force pole and second top force pole outer end all imbed on the platform support is inboard.
Has the advantages that:
(1) the device is provided with a first spring and a second spring, the first spring vertically generates a positive stiffness characteristic, the second spring is obliquely arranged to generate a negative stiffness characteristic, the positive stiffness characteristic and the negative stiffness characteristic between the first spring and the second spring are connected in parallel, the first spring and the second spring are in a balance point, the quasi-zero stiffness characteristic is generated, the nonlinear vibration isolation effect is achieved on the opposite moving platform, the problem that the traditional linear vibration isolation reduces the stiffness of the vibration isolator, the low-frequency vibration isolation is achieved, the static stability of the vibration isolator is improved, and a good vibration isolation effect is achieved when a high-precision instrument is used.
(2) The initial positions of the first spring and the second spring can be adjusted through the arrangement of the first adjusting rod and the second adjusting rod, so that the wide-area supporting vibration isolation is increased, the vibration isolation device can be widely applied to precise instruments and equipment with strict vibration isolation requirements, and has good vibration isolation usability.
(3) Through the setting of first jacking rod and second jacking rod, can have decurrent gravity to press to when moving the platform and settling and receiving the ballast on first isolator and the second isolator for first jacking rod and second jacking rod are the upwards effort that slopes form has upwards withstand, are avoided being pressed on first isolator and the second isolator and become too big, have guaranteed the state that is in a balance point between first spring and the second spring.
Drawings
Fig. 1 is a schematic view of a local three-dimensional structure of the present invention.
Fig. 2 is a schematic diagram of a three-dimensional structure of the platform support, the first vibration isolator and the second vibration isolator of the present invention.
Fig. 3 is an enlarged schematic structural diagram of fig. 2A of the present invention.
Fig. 4 is a schematic view of the bottom structure of the movable platform of the present invention.
In FIGS. 1-4: the device comprises a platform support 1, a strut traction ball 101, a fixed base 102, a first vibration isolator 2, a first spring 201, a first traction ball 202, a first mounting groove 203, a first adjusting rod 204, a first jacking rod 205, a second vibration isolator 3, a second spring 301, a second traction ball 302, a second mounting groove 303, a second adjusting rod 304, a second jacking rod 305, a movable platform 4 and a mounting head 5.
Detailed Description
Referring to fig. 1 to 4, in an embodiment of the present invention, a quasi-zero stiffness vibration isolation platform with adjustable positive and negative stiffness comprises a platform support 1, a first vibration isolator 2, a second vibration isolator 3, a movable platform 4 and an installation head 5, wherein the first vibration isolator 2 is movably connected to the upper and lower sides in front of the front side of the platform support 1, the second vibration isolator 3 is movably connected to the upper and lower sides in back of the platform support 1, the second vibration isolator 3 and the first vibration isolator 2 are arranged at intervals, the movable platform 4 is movably connected to the upper sides of the second vibration isolator 3 and the first vibration isolator 2, and the installation head 5 is embedded into the upper and lower sides of the bottom surface of the movable platform 4;
the platform support 1 comprises a support rod traction ball 101 and a fixed base 102, the support rod traction ball 101 is welded above and below the inner side of the platform support 1, and the fixed base 102 is embedded in the bottom of the platform support 1;
the first vibration isolator 2 comprises a first spring 201, first traction balls 202, a first mounting groove 203, first adjusting rods 204 and first jacking rods 205, wherein the first spring 201 is embedded in the left side and the right side of the first vibration isolator 2 and in the middle of the lower part of the first vibration isolator, the first traction balls 202 are embedded in the inner sides of the first spring 201, the first mounting groove 203 is embedded in the middle of the top of the first vibration isolator 2 on the upper side, the first adjusting rods 204 are embedded in the left side and the right side of the first vibration isolator 2, the first adjusting rods 204 are positioned on the inner side of the first spring 201, and the first jacking rods 205 are embedded in the left side and the right side of the lower part of the first vibration isolator 2;
In this embodiment, the sizes of the strut traction ball 101, the first traction ball 202 and the second traction ball 302 are all the same and are respectively embedded between the first spring 201 and the second spring 301, and through the arrangement of the strut traction ball 101, the first traction ball 202 and the second traction ball 302, the first spring 201 and the second spring 301 can be tensioned and pulled by the platform support 1, the first vibration isolator 2 and the second vibration isolator 3 between the horizontal direction and the longitudinal direction, so as to promote the stability between the first spring 201 and the second spring 301 on the platform support 1.
This embodiment is preferred, first spring 201, second spring 301, be the triangle-shaped setting between first isolator 2 and the second isolator 3, produce positive rigidity characteristic perpendicularly by first spring 201, second spring 301 puts to one side and produces the negative rigidity characteristic, make its positive and negative rigidity characteristic between first spring 201 and the second spring 301 parallelly connected each other, when making between first spring 201 and the second spring 301 be in the equilibrium point, thereby produce the quasi-zero rigidity characteristic, reach non-linear vibration isolation effect on the platform of moving 4, thereby effectively overcome the rigidity that traditional linear vibration isolation reduces the isolator and realize the low frequency vibration isolation, promote the static stability of isolator, there is good vibration isolation effect when high accuracy instrument and equipment uses.
In the present embodiment, the first springs 201 are disposed in a vertical structure and are positive stiffness elements, when the inclination degree of the first springs 201 is small, the characteristics of the first vibration isolator 2 are mainly determined by the first springs 201, and the first springs 201 exhibit positive stiffness characteristics, and the non-linear characteristics are also weak, only when the inclination degree of the second springs 301 and the vertical direction of the first springs 201 are at a balance point, the negative stiffness generated by the second springs 301 is offset by the positive stiffness generated by the first springs 201, and a quasi-zero stiffness is formed at the balance point, so that the non-linear characteristics are exhibited, and a good vibration isolation effect is achieved.
Preferably, the second spring 301 is disposed in a tilted structure and is a negative stiffness element, and the first spring 201 is disposed in a tilted structure, so that the negative stiffness characteristic is exhibited, and the greater the tilt degree is, the more obvious the negative stiffness characteristic is, and the stronger the non-linear characteristic is.
In the preferred embodiment, the movable grooves are formed between the first adjusting rod 204 and the second adjusting rod 304 and between the first vibration isolator 2 and the second vibration isolator 3, the middle parts of the outer ends of the first adjusting rod 204 and the second adjusting rod 304 are embedded with the first traction ball 202 and the second traction ball 302, the initial positions of the first spring 201 and the second spring 301 can be adjusted through the arrangement of the first adjusting rod 204 and the second adjusting rod 304, the vibration isolation is supported in a wide area, the vibration isolating device can be widely applied to precise instruments and equipment with strict vibration isolating requirements, and the vibration isolating usability is good.
Preferably, in this embodiment, the first and second thrust rods 205 and 305 are both arranged in an upward-inclined structure, and the outer ends of the first and second thrust rods 205 and 305 are embedded in the inner side of the platform support 1, and through the arrangement of the first and second thrust rods 205 and 305, when the movable platform 4 is placed on the first and second vibration isolators 2 and 3 and is ballasted, downward gravity presses the movable platform, so that the first and second thrust rods 205 and 305 are inclined upward and have an upward-pressing acting force, which prevents the first and second vibration isolators 2 and 3 from being deformed too much, and ensures that the space between the first and second springs 201 and 301 is at a balance point.
The working principle is as follows: firstly, the mounting head 5 at the bottom of the movable platform 4 is aligned with the positions of the first mounting groove 203 and the second mounting groove 303 on the first vibration isolator 2 and the second vibration isolator 3 for mounting and stabilizing, which is convenient for use, the first spring 201 vertically generates positive stiffness characteristic, the second spring 301 is obliquely arranged to generate negative stiffness characteristic, so that the positive stiffness characteristic and the negative stiffness characteristic between the first spring 201 and the second spring 301 are mutually connected in parallel, when the first spring 201 and the second spring 301 are in a balance point, the quasi-zero stiffness characteristic is generated, the nonlinear vibration isolation effect is achieved on the movable platform 4, the problem that the traditional linear vibration isolation reduces the stiffness of the vibration isolators is effectively overcome, the low-frequency vibration isolation is realized, the static stability of the vibration isolators is improved, good vibration isolation effect is realized when high-precision instruments and equipment are used, meanwhile, the initial positions of the first spring 201 and the second spring 301 can be adjusted through the arrangement of the first adjusting rod 204 and the second, reach the wide region of increase and support the vibration isolation, but wide application has good vibration isolation usability to the strict accurate instrument and equipment of vibration isolation requirement, finally, move platform 4 arrangement and first isolator 2 and second isolator 3 on receive the ballast to have decurrent gravity to press to for first ejector pin 205 and second ejector pin 305 are the upwards slope form and have the effort of upwards withstanding, avoid being pressed the deformation on first isolator 2 and the second isolator 3 and become too big, guaranteed the state that is in a balance point between first spring 201 and the second spring 301.
Claims (7)
1. The utility model provides a positive negative rigidity adjustable accurate zero rigidity vibration isolation platform, includes platform support (1), first isolator (2), second isolator (3), moves platform (4) and installation head (5), its characterized in that: the upper side and the lower side of the front of the platform support (1) are movably connected with a first vibration isolator (2), the upper side and the lower side of the rear of the platform support (1) are movably connected with a second vibration isolator (3), the second vibration isolator (3) and the first vibration isolator (2) are arranged at intervals, a movable platform (4) is movably connected above the second vibration isolator (3) and the first vibration isolator (2), and mounting heads (5) are embedded into the upper side and the lower side of the bottom surface of the movable platform (4);
the platform support (1) comprises strut traction balls (101) and fixed bases (102), the strut traction balls (101) are welded above and below the inner side of the platform support (1), and the fixed bases (102) are embedded in the bottom of the platform support (1);
the first vibration isolator (2) comprises a first spring (201), a first traction ball (202), a first mounting groove (203), a first adjusting rod (204) and a first jacking rod (205), wherein the first spring (201) is embedded into the left side and the right side of the first vibration isolator (2) and the middle part below the first vibration isolator (2), the first traction ball (202) is embedded into the inner side of the first spring (201), the first mounting groove (203) is embedded into the middle of the top of the first vibration isolator (2) on the upper side, the first adjusting rod (204) is embedded into the left side and the right side of the first vibration isolator (2), the first adjusting rod (204) is located on the inner side of the first spring (201), and the first jacking rod (205) is embedded into the left side and the right side below the first vibration isolator (2);
second isolator (3) include second spring (301), second traction ball (302), second mounting groove (303), second regulation pole (304) and second top power pole (305), second spring (301) all imbeds and sets up in the second isolator (3) left and right sides, second traction ball (302) all imbeds and sets up in second spring (301) inboardly, second mounting groove (303) imbeds and sets up in the middle of upside second isolator (3) top, second regulation pole (304) all imbeds and sets up in second isolator (3) left and right sides, and second regulation pole (304) all are located second spring (301) inboardly, second top power pole (305) all imbeds and sets up the left and right sides in second isolator (3) below.
2. The positive and negative stiffness adjustable quasi-zero stiffness vibration isolation platform according to claim 1, wherein: the sizes of the support rod traction ball (101), the first traction ball (202) and the second traction ball (302) are all the same, and the support rod traction ball, the first traction ball and the second traction ball are respectively embedded between the first spring (201) and the second spring (301).
3. The positive and negative stiffness adjustable quasi-zero stiffness vibration isolation platform according to claim 1, wherein: the first spring (201), the second spring (301), the first vibration isolator (2) and the second vibration isolator (3) are arranged in a triangular shape.
4. The positive and negative stiffness adjustable quasi-zero stiffness vibration isolation platform according to claim 1, wherein: the first springs (201) are arranged in a vertical structure and are positive stiffness elements.
5. The positive and negative stiffness adjustable quasi-zero stiffness vibration isolation platform according to claim 1, wherein: the second spring (301) is arranged in an inclined shape structure and is a negative stiffness element.
6. The positive and negative stiffness adjustable quasi-zero stiffness vibration isolation platform according to claim 1, wherein: and movable grooves are formed between the first adjusting rod (204) and the second adjusting rod (304) and between the first vibration isolator (2) and the second vibration isolator (3), and the middle parts of the outer ends of the first adjusting rod (204) and the second adjusting rod (304) are embedded into the first traction ball (202) and the second traction ball (302).
7. The positive and negative stiffness adjustable quasi-zero stiffness vibration isolation platform according to claim 1, wherein: first top force pole (205) and second top force pole (305) all are the upward sloping column structure setting, and first top force pole (205) and second top force pole (305) outer end all imbeds on platform support (1) inboard.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020064761.4U CN211976317U (en) | 2020-01-11 | 2020-01-11 | Positive and negative rigidity adjustable quasi-zero rigidity vibration isolation platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020064761.4U CN211976317U (en) | 2020-01-11 | 2020-01-11 | Positive and negative rigidity adjustable quasi-zero rigidity vibration isolation platform |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576689A (en) * | 2020-12-04 | 2021-03-30 | 哈尔滨工程大学 | Low-frequency heavy-load quasi-zero stiffness vibration isolation device |
| CN113309784A (en) * | 2021-06-16 | 2021-08-27 | 西北工业大学 | Geometric nonlinear adjustable multi-stable-state device |
| CN113357308A (en) * | 2021-07-14 | 2021-09-07 | 吉林大学 | High-efficient low frequency vibration isolation device |
| CN114278703A (en) * | 2021-12-30 | 2022-04-05 | 哈尔滨工程大学 | Low-frequency quasi-zero stiffness vibration isolator integrated with double-geometric nonlinear structure |
-
2020
- 2020-01-11 CN CN202020064761.4U patent/CN211976317U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576689A (en) * | 2020-12-04 | 2021-03-30 | 哈尔滨工程大学 | Low-frequency heavy-load quasi-zero stiffness vibration isolation device |
| CN113309784A (en) * | 2021-06-16 | 2021-08-27 | 西北工业大学 | Geometric nonlinear adjustable multi-stable-state device |
| CN113309784B (en) * | 2021-06-16 | 2022-04-05 | 西北工业大学 | Geometric nonlinear adjustable multi-stable-state device |
| CN113357308A (en) * | 2021-07-14 | 2021-09-07 | 吉林大学 | High-efficient low frequency vibration isolation device |
| CN113357308B (en) * | 2021-07-14 | 2022-08-16 | 吉林大学 | High-efficient low frequency vibration isolation device |
| CN114278703A (en) * | 2021-12-30 | 2022-04-05 | 哈尔滨工程大学 | Low-frequency quasi-zero stiffness vibration isolator integrated with double-geometric nonlinear structure |
| CN114278703B (en) * | 2021-12-30 | 2024-03-15 | 哈尔滨工程大学 | Low-frequency quasi-zero stiffness vibration isolator integrated by double-geometric nonlinear structure |
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Effective date of registration: 20210315 Address after: 215000 group 20, Xinzha village, Liuhe Town, Taicang City, Suzhou City, Jiangsu Province Patentee after: TAICANG TIANHE ELECTROMECHANICAL Co.,Ltd. Address before: No. 28, biantang team, Shajing village committee, Tanwei Town, Qinzhou City, Guangxi Zhuang Autonomous Region Patentee before: Lao Changbo |