Quasi-zero stiffness vibration isolator with intelligent control system

Abstract

The invention relates to the technical field of vibration isolators, and discloses a quasi-zero stiffness vibration isolator with an intelligent control system, the quasi-zero stiffness vibration isolator comprises a shell, the interior of the shell is fixedly connected with a fixing column, the top of the shell is slidably connected with a top plate, and the interior of the shell is provided with a vibration isolation assembly; the vibration isolation assembly comprises a first limiting rod, the two ends of the first limiting rod are fixedly connected to the outer wall of the fixing column, a second limiting rod is fixedly connected to the outer wall of the fixing column, and a limiting assembly is arranged at one end of the second limiting rod. One side of a first connecting plate is connected with a sliding block through a first supporting rod to slide on the outer wall of a first limiting rod, the other side of the sliding block is connected with a sleeve through a second supporting rod to slide on the outer wall of a second limiting rod, the left side and the right side of the sleeve are supported and reset through tension of a third spring and a second spring, and the multi-direction vibration isolation effect is achieved; the problem that a single steel sheet is prone to metal fatigue when vibration isolation is conducted is solved, and the vibration isolation efficiency of the vibration isolator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration isolators, in particular to a quasi-zero stiffness vibration isolator with an intelligent control system. Background Art

[0002] During the operation of industrial equipment, vibration interference caused by mechanical moving parts or the external environment will not only affect the accuracy and stability of the equipment, but also cause structural fatigue, shortened lifespan, and even cause safety hazards. Therefore, vibration isolation technology, as an important means to ensure the smooth operation of equipment, has been widely used in precision processing equipment, electronic instruments, aerospace, and high-end manufacturing. In order to improve the vibration isolation effect, quasi-zero stiffness isolator structures with nonlinear characteristics have been gradually developed in recent years. Through designs close to the "zero stiffness" point, the system can still achieve good vibration isolation performance in the low frequency band, becoming an important direction for the optimization of vibration isolator structures. At the same time, integrated design combined with intelligent control systems has also become a technical trend to improve the response speed and adaptability of vibration isolators.

[0003] Existing quasi-zero stiffness isolators generally use series stiffness adjustment structures or parallel spring damping elements to achieve low-frequency vibration isolation. Their basic structure usually consists of main support structures, elastic elements, dampers and other components. A typical method includes using metal spring sheets that are symmetrically arranged in one direction or two directions to form an approximate "zero stiffness" point under a specific preload, thereby achieving low-frequency vibration isolation characteristics. In structural design, most of them construct mechanical models by fixing stiffness steel sheets, preloaded springs or nonlinear support mechanisms to achieve vibration isolation goals. However, the above structures mostly focus on theoretical stiffness adjustment, and in practical applications, they have limitations such as material fatigue, directional inconsistency, and slow response. In particular, metal elastic elements are prone to stiffness degradation or fatigue failure under long-term load conditions, affecting system reliability and long-term vibration isolation efficiency.

[0004] In addition, existing quasi-zero stiffness vibration isolators usually use a rigid connection in a single direction or an elastic vibration isolation structure composed of metal sheets. Although the theoretical design can achieve a vibration isolation effect within a specific frequency range, it relies on the metal structure to generate elastic restoring force. It is easily affected by metal fatigue and micro crack expansion during long-term use, resulting in a decrease in vibration isolation performance. Especially in a multi-directional vibration environment, the single-direction vibration isolation design cannot fully absorb and buffer disturbances from various dimensions, limiting its applicability in complex working conditions. Therefore, it is urgent to propose an innovative quasi-zero stiffness vibration isolator structure that can achieve multi-directional vibration isolation, has stronger structural flexibility, and has higher fatigue resistance, so as to improve the vibration isolation efficiency and extend the service life of the system. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a quasi-zero stiffness vibration isolator with an intelligent control system, which solves the problem that a single steel sheet is susceptible to metal fatigue when performing vibration isolation.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a quasi-zero stiffness vibration isolator with an intelligent control system, comprising a shell, a fixed column fixedly connected to the interior of the shell, a top plate slidably connected to the top of the shell, and a vibration isolation component arranged inside the shell;

[0007] The vibration isolation assembly includes a limit rod 1, both ends of which are fixedly connected to the outer wall of the fixed column, the outer wall of the fixed column is fixedly connected to the limit rod 2, and a limit assembly is provided at one end of the limit rod 2, the outer wall of the limit rod 1 is slidably connected to a symmetrically arranged slider, the inside of the slider is rotatably connected to the support rod 1, one end of the support rod 1 is rotatably connected to the connecting plate 1, the connecting plate 1 is slidably connected to the outer wall of the limit rod 2, the inside of the slider is rotatably connected to the support rod 2, one end of the support rod 2 is rotatably connected to the sleeve, and the sleeve is slidably connected to the outer wall of the limit rod 2, the outer wall of the limit rod 1 is sleeved with a first spring, the outer wall of the limit rod 2 is sleeved with a second spring and a third spring, and the top of the connecting plate 1 is fixedly connected to the bottom of the top plate.

[0008] Preferably, the limiting assembly includes a limiting plate 1, and one side of the limiting plate 1 is fixedly connected to one end of the limiting rod 2.

[0009] Preferably, both ends of the first spring are fixedly connected between the sliders, one end of the third spring is fixedly connected to the outer wall of the fixed column, the other end of the third spring is fixedly connected to one side of the sleeve, one end of the second spring is fixedly connected to the other side of the sleeve, and the other end of the second spring is fixedly connected to one side of the limit plate.

[0010] Preferably, a connecting tongue plate is fixedly connected to the outer wall of the shell, and a reinforcing plate is fixedly connected to the top of the connecting tongue plate.

[0011] Preferably, a mounting pin is provided inside the connecting tongue plate, and the outer wall of the mounting pin is fixedly connected to the second limiting plate.

[0012] Preferably, the interior of the mounting pin is fixedly connected to a limiting rod three, and the outer wall of the limiting rod three is slidably connected to a symmetrically arranged clamping block.

[0013] Preferably, a reset spring 1 is sleeved on the outer wall of the third limit rod, a reset spring 2 is arranged between the clamping blocks, and both ends of the reset spring 1 and the reset spring 2 are fixedly connected between the clamping blocks.

[0014] Preferably, the interior of the mounting pin is fixedly connected to a limiting column, and the outer wall of the limiting column is slidably connected to a second connecting plate.

[0015] Preferably, both sides of the connecting plate are fixedly connected with connecting rods, one end of the connecting rod is fixedly connected with a pinching block, and the other end of the connecting rod is fixedly connected with a disassembly sleeve.

[0016] Preferably, a reset spring three is sleeved on the outer wall of the limiting column, one end of the reset spring three is fixedly connected to the inside of the mounting pin, and the other end of the reset spring three is fixedly connected to the top of the connecting plate two.

[0017] Working principle: When using the quasi-zero stiffness vibration isolator, first install the shell to the column. You only need to drill a hole in the column and place the shell on the top of the column. Then, insert the mounting pin through the connecting tongue plate into the column. The mounting pin is limited at the top of the connecting tongue plate together with the Forbidden City limit plate 2, and is embedded in the opening through the clamping block inside the mounting pin. The clamping block is limited in the mounting pin by the limiting rod 3 and supported by the tension of the return spring 1 and the return spring 2, so that it is stably embedded in the opening, achieving the effect of facilitating the installation of the vibration isolator. When disassembly is required, the disassembly sleeve at one end of the connecting rod is lifted upward by the pinching block, so that the disassembly sleeve drives the clamping block to retract into the mounting pin, and then the mounting pin can be pulled out from the opening.

[0018] When using the vibration isolator, the equipment is placed on the top of the top plate. When there is horizontal displacement in the left and right directions, the bottom of the top plate slides on the outer wall of the limit rod 2 through the connecting plate 1. At the same time, one side of the connecting plate 1 is connected to the slider through the support rod 1 and slides on the outer wall of the limit rod 1. The other side of the slider is slidably connected to the sleeve on the outer wall of the limit rod 2 through the support rod 2. The sliders are supported and buffered by the tension of the first spring, and the left and right sides of the sleeve are reset by the tension support of the third spring and the second spring, so that the connecting plate 1 can effectively drive the reset to prevent the vibration from being amplified, thereby achieving the effect of multi-directional vibration isolation.

[0019] The present invention provides a quasi-zero stiffness vibration isolator with an intelligent control system. It has the following beneficial effects:

[0020] 1. The present invention first connects one side of the connecting plate to the slider through the support rod 1 and slides on the outer wall of the limit rod 1, and the other side of the slider is slidably connected to the sleeve on the outer wall of the limit rod 2 through the support rod 2. The sliders are supported and buffered by the tension of the first spring, and the left and right sides of the sleeve are reset by the tension support of the third spring and the second spring, thereby achieving the effect of multi-directional vibration isolation, solving the problem that traditional vibration isolators are susceptible to metal fatigue by isolating vibration through a single steel sheet, and improving the vibration isolation efficiency of the vibration isolator.

[0021] 2. The mounting pin of the present invention is limited at the top of the connecting tongue plate by the limiting plate 2, and is engaged in the opening through the clamping block inside the mounting pin. The clamping block is limited in the mounting pin by the limiting rod 3 and is supported by the tension of the reset spring 1 and the reset spring 2, so that it is stably engaged in the opening, achieving the effect of facilitating the installation of the vibration isolator, solving the problem of the inconvenience of installing expansion bolts on the column when the traditional vibration isolator is installed on the pillar, and improving the convenience of the vibration isolator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 Schematic diagram of the top plate structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the fixed column structure of the present invention;

[0025] Figure 4 This is a structural diagram of a support rod according to the present invention;

[0026] Figure 5 This is a schematic diagram of the connecting tongue structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the card block structure of the present invention.

[0028] Among them, 1. Shell; 2. Fixed column; 3. Limit rod 1; 4. Limit rod 2; 5. Connecting plate 1; 6. Slider; 7. First spring; 8. Support rod 1; 9. Support rod 2; 10. Sleeve; 11. Second spring; 12. Third spring; 13. Limit plate 1; 14. Top plate; 15. Connecting tongue plate; 16. Reinforcement plate; 17. Mounting pin; 18. Limit plate 2; 19. Limit rod 3; 20. Block; 21. Return spring 1; 22. Return spring 2; 23. Limit column; 24. Return spring 3; 25. Connecting plate 2; 26. Connecting rod; 27. Pinch block; 28. Disassembly sleeve. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example:

[0031] Please see the attached Figure 1 -Attached Figure 4The embodiment of the present invention provides a quasi-zero stiffness vibration isolator with an intelligent control system, including a shell 1. The shell 1 is an integral load-bearing and structural protection unit for accommodating internal vibration isolation components and maintaining the rigid stability of the system. A fixed column 2 is fixedly connected to the inside of the shell 1. The fixed column 2 serves as a core support unit for internal structural connection and provides a stable installation reference for various elastic components and sliding components. A top plate 14 is slidably connected to the top of the shell 1. The top plate 14 is a structural element that bears external loads and can be relatively displaced in the up and down directions relative to the shell 1 to achieve a vibration isolation response function. A vibration isolation component is provided inside the shell 1.

[0032] The vibration isolation assembly includes a limit rod 3, which provides horizontal guidance and limiting functions to ensure that the movement path of the slider 6 is controllable and stable. Both ends of the limit rod 3 are fixedly connected to the outer wall of the fixed column 2, and a stable support frame is formed through the outer wall of the fixed column 2. The outer wall of the fixed column 2 is fixedly connected to the limit rod 2 4, and the limit rod 2 4 realizes the guidance and support of the vertical sliding assembly. As a guide rail structure for the slider 6 and the sleeve 10 to work together, a limit assembly is provided at one end of the limit rod 2 4. The limit assembly is used to limit the movement limit of moving parts such as the sleeve 10 to prevent damage caused by excessive displacement of the structure. The outer wall of the limit rod 3 is slidably connected with a symmetrically arranged slider 6. The slider 6 is the main force transmission and support structure, and cooperates with the limit rod 3 to achieve horizontal isolation. Vibration and buffering, the slider 6 is internally connected to a support rod 8, and the support rod 8 is connected by rotation, allowing the structure to produce a certain angle of deflection, thereby improving the flexibility and multi-dimensional vibration isolation capability of the system. One end of the support rod 8 is rotatably connected to a connecting plate 5, and the connecting plate 5 serves as a structural connection between the slider 6 and the top plate 14, transferring the load from the top plate 14 to the vibration isolation system. The connecting plate 5 is slidably connected to the outer wall of the limit rod 24, so that it can move in the vertical direction, and cooperate with the spring system to realize the buffering and reset functions. The slider 6 is internally connected to a support rod 29, and the support rod 29 is swingably connected in the slider 6 to provide a fulcrum for the free rotation connected to the sleeve 10, thereby enhancing the dynamic response characteristics of the system. One end of the support rod 29 is rotatably connected to the sleeve 10, and the sleeve 10 is a key structure for reset and buffering, which can slide on the limit rod 24 to alleviate instantaneous impact and assist in completing multi-directional vibration isolation. The sleeve 10 is slidably connected to the outer wall of the limit rod 24, allowing free expansion and contraction under the action of the second and third springs 12 to achieve dynamic balance. The outer wall of the limit rod 13 is sleeved with a first spring 7, which is used for the elastic connection between the sliders 6 to provide flexible support and vibration isolation tension in the horizontal direction. The outer wall of the limit rod 24 is sleeved with a second spring 11 and a third spring 12. The second spring 11 and the third spring 12 serve as vertical elastic elements, which act together on both sides of the sleeve 10 to provide stable restoring force and dynamic balance. The top of the connecting plate 5 is fixedly connected to the bottom of the top plate 14 to realize the transmission of the movement of the top plate 14 to the slider 6 and the whole The vibration isolation structure and the limit assembly include a limit plate 13, which is used to limit the maximum displacement of the sleeve 10 to avoid structural failure. One side of the limit plate 13 is fixedly connected to one end of the limit rod 2 4 to ensure the relative stability of the limit function and the guide rail structure. Both ends of the first spring 7 are fixedly connected between the sliders 6, so that the two sliders 6 can form a symmetrical restoring force through elastic tension when disturbed, thereby improving the isolation effect of the system against lateral disturbances. One end of the third spring 12 is fixedly connected to the outer wall of the fixed column 2, and the other end of the third spring 12 is fixedly connected to one side of the sleeve 10 to provide elastic constraint for the sleeve 10 in one direction. One end of the second spring 11 is fixedly connected to the other side of the sleeve 10, and the other end of the second spring 11 is fixedly connected to one side of the limit plate 13.Together with the third spring 12, it forms a symmetrical elastic arrangement at both ends of the sleeve 10, ensuring effective reset and vibration absorption after movement.

[0033] Please see the attached Figure 5 and attached Figure 6The outer wall of the shell 1 is fixedly connected with a connecting tongue plate 15, which is used to achieve a stable connection with the external supporting structure to enhance the overall installation reliability of the device. A reinforcing plate 16 is fixedly connected to the top of the connecting tongue plate 15. The reinforcing plate 16 is used to enhance the structural strength of the connecting tongue plate 15, improve its stability under stress, and prevent deformation or breakage. A mounting pin 17 is passed through the inside of the connecting tongue plate 15. The mounting pin 17 serves as a movable connecting shaft to support and guide the assembly and movement of the internal limit and reset structure. The outer wall of the mounting pin 17 is fixedly connected to the limiting plate 2 18. The limiting plate 2 18 is used to limit the axial movement of the mounting pin 17 to prevent the mounting pin 17 from falling out and ensure the structural integrity of the system. The mounting pin 17 is fixedly connected to the limiting rod Three 19, the limit rod three 19 serves as a supporting guide rod of the internal symmetrical structure, providing a sliding guide for components such as the card block 20. The outer wall of the limit rod three 19 is slidably connected with a symmetrically arranged card block 20. The card block 20 can slide left and right on the limit rod three 19 to clamp or release certain components of the device to achieve the function of clamping or separating. The outer wall of the limit rod three 19 is sleeved with a return spring one 21. The return spring one 21 is used to symmetrically push the card block 20 to reset, ensuring that the card block 20 automatically returns to its original position after use and maintains the initial locking state. A return spring two 22 is provided between the card blocks 20, and the return spring two 22 provides a lateral bidirectional elastic force to form a symmetrical clamping and releasing elastic mechanism between the two card blocks 20. Both ends of the return spring one 21 and the return spring two 22 are The two sets of springs are fixedly connected between the card blocks 20, and they work together to provide stable reset and elastic clamping functions for the card blocks 20, thereby improving the reliability of the structure. The internal fixing pin 17 is fixedly connected to the limiting column 23, which is a longitudinal guide of the internal structure and is used to support the connecting plate 25 and its linkage structure to ensure the stability of its movement direction. The outer wall of the limiting column 23 is slidably connected to the connecting plate 25, and the connecting plate 25 can slide along the limiting column 23 to achieve coordinated movement with transmission components such as the connecting rod 26, thereby pushing the pinching block 27 or disassembling the structure. The two sides of the connecting plate 25 are fixedly connected with the connecting rod 26. The connecting rod 26 serves as a force transmission mechanism, which can convert the linear motion of the connecting plate 25 into the linkage action of the pinching block 27 and the disassembly sleeve 28. One end of the connecting rod 26 is fixedly connected to a pinch block 27, which is a small structural part used for manual control or clamping, which is convenient for user operation or structural separation function. The other end of the connecting rod 26 is fixedly connected to a disassembly sleeve 28, which is used for quick disassembly or adjustment of the device, and cooperates with the pinch block 27 to realize human-computer interaction operation. The outer wall of the limit column 23 is provided with a reset spring three 24, which is a vertical reset elastic part. It provides a return force after the connecting plate two 25 is actuated to ensure that the mechanism returns to its initial position. One end of the reset spring three 24 is fixedly connected to the inside of the mounting pin 17, and the other end of the reset spring three 24 is fixedly connected to the top of the connecting plate two 25. The effective elastic reset function is realized by fixing both ends to ensure that the mechanism operates reliably and maintains a stable initial state.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A quasi-zero stiffness vibration isolator with an intelligent control system, comprising a housing (1), characterized in that: A fixed column (2) is fixedly connected to the interior of the shell (1), a top plate (14) is slidably connected to the top of the shell (1), and a vibration isolation component is provided inside the shell (1); The vibration isolation assembly includes a limiting rod (3), both ends of which are fixedly connected to the outer wall of the fixed column (2), the outer wall of the fixed column (2) is fixedly connected to a limiting rod (4), one end of the limiting rod (4) is provided with a limiting assembly, the outer wall of the limiting rod (3) is slidably connected to a symmetrically arranged slider (6), the inner part of the slider (6) is rotatably connected to a support rod (8), one end of the support rod (8) is rotatably connected to a connecting plate (5), and the connecting plate (5) is rotatably connected to the outer wall of the limiting rod (3). (5) is slidably connected to the outer wall of the limiting rod 2 (4), the slider (6) is rotatably connected to the support rod 2 (9), one end of the support rod 2 (9) is rotatably connected to the sleeve (10), the sleeve (10) is slidably connected to the outer wall of the limiting rod 2 (4), the outer wall of the limiting rod 1 (3) is provided with a first spring (7), the outer wall of the limiting rod 2 (4) is provided with a second spring (11) and a third spring (12), and the top of the connecting plate 1 (5) is fixedly connected to the bottom of the top plate (14).

2. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 1, characterized in that: The limiting assembly includes a limiting plate (13), one side of which is fixedly connected to one end of a limiting rod (4).

3. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 1, characterized in that: Both ends of the first spring (7) are fixedly connected between the sliders (6), one end of the third spring (12) is fixedly connected to the outer wall of the fixed column (2), and the other end of the third spring (12) is fixedly connected to one side of the sleeve (10), one end of the second spring (11) is fixedly connected to the other side of the sleeve (10), and the other end of the second spring (11) is fixedly connected to one side of the limit plate (13).

4. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 1, characterized in that: A connecting tongue plate (15) is fixedly connected to the outer wall of the shell (1), and a reinforcing plate (16) is fixedly connected to the top of the connecting tongue plate (15).

5. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 4, characterized in that: A mounting pin (17) is provided inside the connecting tongue plate (15), and the outer wall of the mounting pin (17) is fixedly connected to the second limiting plate (18).

6. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 5, characterized in that: The interior of the mounting pin (17) is fixedly connected to a limiting rod three (19), and the outer wall of the limiting rod three (19) is slidably connected to a symmetrically arranged clamping block (20).

7. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 6, characterized in that: The outer wall of the limiting rod 3 (19) is provided with a reset spring 1 (21), and a reset spring 2 (22) is provided between the clamping blocks (20). Both ends of the reset spring 1 (21) and the reset spring 2 (22) are fixedly connected between the clamping blocks (20).

8. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 5, characterized in that: The interior of the mounting pin (17) is fixedly connected to a limiting column (23), and the outer wall of the limiting column (23) is slidably connected to a second connecting plate (25).

9. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 8, characterized in that: Both sides of the second connecting plate (25) are fixedly connected with connecting rods (26), one end of the connecting rod (26) is fixedly connected with a pinching block (27), and the other end of the connecting rod (26) is fixedly connected with a disassembly sleeve (28).

10. The quasi-zero stiffness vibration isolator with an intelligent control system according to claim 8, characterized in that: The outer wall of the limiting column (23) is provided with a reset spring three (24), one end of the reset spring three (24) is fixedly connected to the inside of the mounting pin (17), and the other end of the reset spring three (24) is fixedly connected to the top of the connecting plate two (25).

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