Three-dimensional seismic isolation table based on rolling mechanism and seismic isolation method

Abstract

The invention discloses a three-dimensional shock isolation table based on a rolling mechanism and a shock isolation method, and relates to the field of shock absorption equipment, the three-dimensional shock isolation table comprises a base and an upper cover, an X-direction bottom slide rail is arranged in the base, a Y-direction upper cover slide rail is arranged in the upper cover, and the slide rail is an arc groove with a low middle and two high sides. The lower roller assembly is in rolling connection with the bottom sliding rail, and the upper roller assembly is in rolling connection with the upper cover sliding rail through a spring limiting device. The device has good adaptability to objects with non-uniform mass distribution and is high in compatibility. The vibration isolation performance is excellent, reliable protection can be provided for cultural relics, exhibits, precise instruments and the like, displacement, falling or damage caused by vibration is prevented, and the application prospect is wide.

Description

Technical Field

[0001] This invention relates to the field of vibration damping equipment, specifically to a three-dimensional vibration isolation table and vibration isolation method based on a rolling mechanism. Background Technology

[0002] With increasing societal demands for cultural heritage protection and the stability of precision instruments, seismic isolation technology is being applied more and more widely in modern engineering. Especially in museums, art galleries, and precision laboratories, effectively isolating the impact of earthquakes, human activities, and environmental vibrations on precious cultural relics and high-precision instruments has become a key research topic.

[0003] Existing seismic isolation devices mostly focus on horizontal seismic isolation, with insufficient vertical seismic isolation capacity, and are also complex in structure and high in cost. For example, the U-shaped rolling vibration isolation platform disclosed in patent CN107114963A relies on the rolling friction of the base slide rail, the top cover slide rail, and the roller assembly to dissipate horizontal vibration energy. It does not have a dedicated vertical active vibration isolation mechanism, resulting in weak vertical vibration isolation capability. Furthermore, it lacks an elastic buffer structure, and when encountering asymmetrical horizontal vibration, the rigid connecting rod is prone to micro-deformation due to uneven force. The close proximity of the two sets of rollers disrupts the synchronization of their movement, potentially causing the top cover to tilt and increasing the risk of exhibits falling. When the horizontal vibration amplitude is large, the rollers are prone to deflection along the width of the slide rail, even posing a risk of derailment. The high-frequency vibration response is delayed; when the high-frequency vibration period is short and the impact frequency is high, the rollers do not have enough time to roll fully along the curved surface of the slide rail before responding to the next vibration impact. This makes it difficult for high-frequency vibration energy to be dissipated through rolling friction, thus affecting the vibration reduction performance. Although it can achieve horizontal vibration isolation, the lack of an active vertical vibration isolation mechanism easily leads to exhibits tilting or derailment. Summary of the Invention

[0004] The purpose of this invention is to provide a three-dimensional vibration isolation table and vibration isolation method based on a rolling mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a three-dimensional vibration isolation table based on a rolling mechanism, comprising a base and an upper cover mounted on the base, wherein the base has a shell structure and is provided with a plurality of bottom slide rails arranged parallel and spaced apart along the X direction inside. The upper cover is provided with a plurality of upper cover slide rails arranged parallel to each other along the Y direction, and the bottom slide rail is arranged perpendicular to the upper cover slide rails. Both the bottom slide rail and the top cover slide rail have circular arc grooves that are low in the middle and high on both sides. The bottom slide rail is provided with a lower roller assembly that can roll along its arrangement direction, and an upper roller assembly that can roll along the arrangement direction of the upper cover slide rail is connected above the lower roller assembly. The lower roller assembly is connected to the upper roller assembly via a spring limiting device.

[0006] Preferably, the lower roller assembly includes a lower roller seat, on both sides of which rollers are respectively mounted to contact the rolling surface of the bottom slide rail; The upper roller assembly includes an upper roller seat, on both sides of which are respectively mounted rollers that contact the rolling surface of the upper cover slide rail; Both the lower roller seat and the upper roller seat are square shell structures.

[0007] Preferably, the roller includes a wheel axle connected in the lower roller seat or the upper roller seat, the extended end of the wheel axle is provided with a roller body, the two sides of the roller body are provided with outer limiting platforms, and the other end opposite to the roller body is provided with an inner limiting platform.

[0008] Preferably, the spring limiting device is provided with two sets of springs, including an outer limiting spring and an inner limiting spring, and is equipped with a slot limiting device and a protruding limiting block to limit Z-direction displacement and provide a restoring force.

[0009] Preferably, a damping rubber layer is provided between the base and the ground or exhibition stand, and the damping rubber layer separates the base from the ground or exhibition stand; An elastic damping plate is attached to the side of the damping rubber layer facing the base; The base is also equipped with fixing screws, which pass through the elastic damping plate and the damping rubber layer in sequence, and fix the base to the ground or exhibition stand.

[0010] Preferably, the radius of curvature R of the arc grooves of the bottom slide rail and the top cover slide rail is 100-500mm.

[0011] Preferably, the outer limiting platform of the roller has a width of 5-20mm, which is used to enhance the horizontal displacement restriction and anti-derailment capability.

[0012] Preferably, the elastic coefficient of the outer limiting spring is greater than that of the inner limiting spring.

[0013] This invention provides a method for using a vibration isolation platform, the method comprising: when a vibration load is transmitted along the X direction, the base moves with the ground, the top cover and the load are relatively stationary under inertia, the rollers roll along the bottom slide rail to dissipate energy, and after vibration, the base automatically resets through the arc groove; When the vibration load is transmitted along the Y direction, the roller rolls along the upper cover slide rail to dissipate energy, and automatically resets through the arc groove after vibration. When a vibration load is transmitted along the Z direction, the spring limiting device absorbs energy through the extension and contraction of the inner and outer springs, and automatically resets after vibration through elastic restoring force.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the innovative design of the slide rail arrangement, alleviates the motion interference of the internal structure of the device during vibration isolation, and the slide rail structure, in the form of a circular arc groove, can limit displacement in the corresponding direction, preventing the risk of derailment. The vertical isolation unit, consisting of two sets of inner and outer springs and a slot limiting device, can actively absorb and dissipate Z-axis energy through stretching and compression when seismic waves or vibration loads are transmitted in a direction perpendicular to the base. The slot limiting device simultaneously restricts the vertical limit displacement, thus solving the technical defect that traditional horizontal isolation devices cannot resist vertical vibration. By using internal and external springs to provide elastic restoring force, combined with the slot limiting device to limit the Z-axis displacement, the risk of exhibits tipping over due to excessive vertical displacement is avoided, while ensuring that the exhibits can automatically reset after vibration by means of the spring's elastic restoring force and their own weight. External limiting platforms are set on both sides of the roller body, which fit tightly with the inner and outer sides of the slide rail to form an embedded rolling constraint, effectively limiting the extreme displacement in the X and Y directions and preventing the roller from derailing. By changing the orientation of the roller assemblies, the problem of asynchronous roller movement or asynchronous reset caused by simultaneous response when facing oblique or high-frequency vibrations was solved. Attached Figure Description

[0015] Figure 1 : Schematic diagram of the overall structure of the seismic isolation platform, showing the base, top cover and external connections; Figure 2 Internal structure diagram showing the slide rail arrangement and roller assembly; Figure 3 : Detailed drawing of the roller structure, showing the limit platform and axle; Figure 4 The spring limiting device structure shows the inner and outer springs and the locking groove; Figure 5 : Schematic diagram of the interaction between rollers and slide rails.

[0016] In the diagram: 1-Top cover, 11-Fixing hole, 2-Base, 3-Top cover slide rail, 4-Bottom slide rail, 5-Upper roller seat, 6-Lower roller seat, 7-Roller, 71-Outer limiting platform, 72-Roller body, 73-Wheel axle, 74-Inner limiting platform, 8-Spring reset device, 81-Inner limiting spring, 82-Outer limiting spring, 83-Limiting slot, 84-Protruding limiting block. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1 to 5 The present invention provides a technical solution: a three-dimensional vibration isolation table based on a rolling mechanism, including a base 2 and an upper cover 1 installed on the base 2. The base 2 has a shell structure and is provided with a plurality of bottom slide rails 4 arranged parallel and spaced along the X direction inside. Both the base 2 and the top cover 1 are square shell structures to save space and reduce weight. Figure 1 , Figure 2 As shown, the base 2 has a bottom slide rail 4 arranged parallel to the X direction inside, and the top cover 1 has a top cover slide rail 3 arranged parallel to the Y direction inside. The slide rail is a circular arc groove that is low in the middle and high on both sides. This design is conducive to the automatic reset to the lowest point after the roller rolls.

[0019] The upper cover 1 is provided with a plurality of upper cover slide rails 3 arranged parallel to each other along the Y direction, and the bottom slide rail 4 is arranged perpendicular to the upper cover slide rails 3. The tracks of the bottom slide rail 4 and the top cover slide rail 3 are both arc grooves that are low in the middle and high on both sides; The bottom slide rail 4 is provided with a lower roller assembly that can roll along its arrangement direction, and an upper roller assembly that can roll along the arrangement direction of the upper cover slide rail 3 is connected above the lower roller assembly. The lower roller assembly is connected to the upper roller assembly via a spring limiting device 8.

[0020] Independent vibration isolation in the X and Y directions is achieved by vertically arranged bottom slide rail 4 and top cover slide rail 3, while spring limiting device 8 provides Z-direction buffering.

[0021] The arc groove design ensures that the roller 7 can automatically return to the equilibrium position after vibration, and avoids motion interference through multi-directional decoupling.

[0022] In this embodiment, the lower roller assembly includes a lower roller seat 6, and rollers 7 that contact the rolling surface of the bottom slide rail 4 are respectively installed on both sides of the lower roller seat 6. The upper roller assembly includes an upper roller seat 5, on both sides of which are respectively mounted rollers 7 that contact the rolling surface of the upper cover slide rail 3; Both the lower roller seat 6 and the upper roller seat 5 are square shell structures.

[0023] The lower roller assembly includes a lower roller seat 6 and a roller 7, and the upper roller assembly includes an upper roller seat 5 and a roller 7, which are connected by a spring limiting device 8.

[0024] like Figure 3 As shown, the roller 7 is installed in the roller seat through the wheel axle 73. The roller body 72 is provided with an outer limiting platform 71 and an inner limiting platform 74 on both sides, which are used to engage with the arc groove of the slide rail to prevent derailment.

[0025] In this embodiment, the roller 7 includes a wheel axle 73 connected to the lower roller seat 6 or the upper roller seat 5. The extended end of the wheel axle 73 is provided with a roller body 72. The two sides of the roller body 72 are provided with outer limiting platforms 71, and the other end opposite to the roller body 72 is provided with an inner limiting platform 74.

[0026] The outer limiting platform 71 and the inner limiting platform 74 form an embedded constraint, which locks the roller into the arc groove of the slide rail, effectively limiting the displacement of the roller 7 in the width direction of the slide rail and preventing it from derailing.

[0027] In this embodiment, the spring limiting device 8 is provided with two sets of springs, including an outer limiting spring 82 and an inner limiting spring 81, and is equipped with a slot limiting device 83 and a protruding limiting block 84, which are used to limit Z-direction displacement and provide a restoring force.

[0028] The inner and outer springs adopt a graded design. The outer limit spring 82 has a larger elastic coefficient and is mainly used for shock absorption, while the inner limit spring 81 has a smaller elastic coefficient to prevent overload and work together to absorb Z-axis energy.

[0029] Spring limiting device 8 Figure 4 As shown, it includes an outer limit spring 82, an inner limit spring 81, a slot limit device 83, and a protruding limit block 84. The outer limit spring 82 mainly provides buffering and restoring force, the inner limit spring 81 is used for overload protection, and the slot limit device 83 and the protruding limit block 84 limit the Z-direction displacement limit.

[0030] In this embodiment, a damping rubber layer is provided between the base 2 and the ground or exhibition stand, and the damping rubber layer separates the base 2 from the ground or exhibition stand. An elastic damping plate is attached to the side of the damping rubber layer facing the base 2; The base 2 is also provided with fixing screws, which pass through the elastic damping plate and the damping rubber layer in sequence, and fix the base 2 to the ground or exhibition stand.

[0031] The damping rubber layer provides secondary vibration isolation, enhancing vertical damping performance and reducing vibration transmission. The elastic damping plate further disperses stress, making it suitable for various foundation conditions.

[0032] In this embodiment, the radius of curvature R of the arc grooves of the bottom slide rail 4 and the top cover slide rail 3 is 100-500mm.

[0033] The radius of curvature affects the rolling trajectory and the reset force: if the radius is too small, the reset may be too fast and cause an impact; if it is too large, the reset will be weak.

[0034] In this embodiment, the outer limiting platform 71 of the roller 7 has a width of 5-20mm, which is used to enhance the horizontal displacement restriction and anti-derailment capability.

[0035] In this embodiment, the elastic coefficient of the outer limiting spring 82 is greater than that of the inner limiting spring 81.

[0036] Set the spring coefficient; the outer limit spring coefficient is 2-2.5 times that of the inner limit spring coefficient.

[0037] The graded spring coefficients achieve progressive buffering of Z-axis vibration: the outer spring handles normal vibration, while the inner spring responds to impact loads.

[0038] A method for using a vibration isolation platform, the method comprising: when a vibration load is transmitted along the X direction, the base 2 moves with the ground, the upper cover 1 and the load are relatively stationary under inertia, the roller 7 rolls along the bottom slide rail 4 to dissipate energy, and automatically resets through the arc groove after vibration; The base 2 moves with the ground, while the top cover 1 and the load remain relatively stationary due to inertia. The roller 7 rolls along the arc groove of the bottom slide rail 4, converting kinetic energy into frictional heat for dissipation. After the vibration ends, the geometry of the arc groove causes the roller 7 to automatically return to its lowest point.

[0039] When the vibration load is transmitted along the Y direction, the roller 7 rolls along the upper cover slide rail 3 to dissipate energy, and automatically resets through the arc groove after vibration. Similar to the X-axis, but roller 7 rolls along the upper cover slide rail 3. The vertically arranged slide rail ensures decoupling of the X and Y axes, avoiding motion interference.

[0040] When the vibration load is transmitted along the Z direction, the spring limiting device 8 absorbs energy through the extension and contraction of the inner and outer springs, and automatically resets after vibration through elastic restoring force.

[0041] When vertical vibration is transmitted, the spring limiting device 8 is activated: the outer limiting spring 82 first compresses to absorb energy, and the inner limiting spring 81 intervenes in case of overload. The slot limiting device limits the extreme displacement value, and the spring restoring force pushes the system to reset after vibration.

[0042] Working principle: The vibration wave is transmitted from the foundation to the base 2, where it is initially filtered by the damping rubber layer. The vibration direction is decomposed into X and Y wave directions, and the corresponding bottom slide rail 4 and top cover slide rail 3 start to work.

[0043] For horizontal vibration, the roller 7 rolls in the arc groove of the slide rail, and the outer limit platform 71 and the inner limit platform 74 prevent derailment, and the rolling friction dissipates energy.

[0044] For vertical vibration, the spring limiting device 8 works, the outer limiting spring 82 is compressed and buffered, the inner limiting spring 81 provides overload protection, and the slot device 83 limits displacement.

[0045] During the above process, the load on the platform remains relatively stationary due to inertia, and the displacement is controlled within an acceptable range.

[0046] After the vibration is reduced, the curvature of the arc groove guides the roller 7 back to the equilibrium point at the bottom of the groove.

[0047] The restoring force of the spring limiting device 8 pushes the upper cover 1 back to its original position, and the protruding limiting block 84 ensures alignment.

[0048] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A three-dimensional vibration isolation table based on a rolling mechanism, characterized in that: Includes a base (2) and an upper cover (1) mounted on the base (2). The base (2) has a shell structure and is provided with a plurality of bottom slide rails (4) arranged parallel to each other along the X direction. The upper cover (1) is provided with a plurality of upper cover slide rails (3) arranged parallel to each other along the Y direction, and the bottom slide rail (4) is arranged perpendicular to the upper cover slide rails (3). The bottom slide rail (4) and the top cover slide rail (3) are both circular arc grooves with a lower middle and higher sides; The bottom slide rail (4) is provided with a lower roller assembly that can roll along its arrangement direction, and an upper roller assembly that can roll along the arrangement direction of the upper cover slide rail (3) is connected above the lower roller assembly. The lower roller assembly is connected to the upper roller assembly via a spring limiting device (8).

2. The three-dimensional vibration isolation table based on a rolling mechanism according to claim 1, characterized in that: The lower roller assembly includes a lower roller seat (6), on both sides of which are rollers (7) that contact the rolling surface of the bottom slide rail (4). The upper roller assembly includes an upper roller seat (5), on both sides of which are respectively mounted rollers (7) that are in contact with the rolling surface of the upper cover slide rail (3). Both the lower roller seat (6) and the upper roller seat (5) are square shell structures.

3. A three-dimensional vibration isolation table based on a rolling mechanism according to claim 2, characterized in that: The roller (7) includes a wheel axle (73) connected to the lower roller seat (6) or the upper roller seat (5). The extended end of the wheel axle (73) is provided with a roller body (72). The roller body (72) is provided with an outer limiting platform (71) on both sides and an inner limiting platform (74) on the other end opposite to the roller body (72).

4. A three-dimensional vibration isolation table based on a rolling mechanism according to claim 1, characterized in that: The spring limiting device (8) is provided with two sets of springs, including an outer limiting spring (82) and an inner limiting spring (81), and is equipped with a slot limiting device (83) and a protruding limiting block (84) to limit Z-direction displacement and provide reset force.

5. A three-dimensional vibration isolation table based on a rolling mechanism according to claim 1, characterized in that: A damping rubber layer is provided between the base (2) and the ground or exhibition stand, and the damping rubber layer separates the base (2) from the ground or exhibition stand. An elastic damping plate is attached to the side of the damping rubber layer facing the base (2); The base (2) is also provided with fixing screws, which pass through the elastic damping plate and the damping rubber layer in sequence, and fix the base (2) to the ground or exhibition stand.

6. A three-dimensional vibration isolation table based on a rolling mechanism according to claim 1, characterized in that: The radius of curvature R of the arc grooves of the bottom slide rail (4) and the top cover slide rail (3) is 100-500mm.

7. A three-dimensional vibration isolation table based on a rolling mechanism according to claim 1, characterized in that: The outer limiting platform (71) of the roller (7) has a width of 5-20mm, which is used to enhance the horizontal displacement restriction and anti-derailment capability.

8. A three-dimensional vibration isolation table based on a rolling mechanism according to claim 1, characterized in that: The elastic coefficient of the outer limiting spring (82) is greater than that of the inner limiting spring (81).

9. A method using a seismic isolation platform as described in any one of claims 1-8, characterized in that: The method includes: when the vibration load is transmitted along the X direction, the base (2) moves with the ground, the top cover (1) and the load are relatively stationary under the action of inertia, the roller (7) rolls along the bottom slide rail (4) to dissipate energy, and automatically resets through the arc groove after vibration; When the vibration load is transmitted along the Y direction, the roller (7) rolls along the upper cover slide rail (3) to dissipate energy, and automatically resets through the arc groove after vibration; When the vibration load is transmitted along the Z direction, the spring limiting device (8) absorbs energy through the extension and contraction of the inner and outer springs, and automatically resets after vibration through elastic restoring force.

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