A shock and vibration double-control elastic isolation support

Abstract

The utility model discloses a kind of shock and vibration double-control elastic shock isolation bearing, the utility model includes horizontal rubber shock isolation bearing, further include vertical vibration isolation support, vertical vibration isolation support includes intermediate connecting plate, elastomer, guide rod, adjusting nut, bottom plate, limit rod, intermediate connecting plate is located above the position of bottom plate, intermediate connecting plate is connected in series with the bottom plate by the guide rod, adjusting nut, elastomer is fixed between intermediate connecting plate and the bottom plate, horizontal rubber shock isolation bearing is installed on intermediate connecting plate, limit rod is installed on bottom plate, horizontal rubber shock isolation bearing and vertical vibration isolation support are mutually vertically connected in series between, horizontal rubber shock isolation bearing realizes horizontal direction shock isolation, vertical vibration isolation support realizes vertical vibration isolation, the vibration isolation dimension of both is mutually decoupled superposition, realizes three-dimensional shock isolation;The problem that traditional support cannot isolate vertical vibration is solved, with the advantages of stable structure, low cost, easy maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of building seismic isolation technology, and in particular relates to a vibration-controlled elastic seismic isolation bearing. Background Technology

[0002] Traditional seismic isolation bearings have to bear the large vertical gravity of the target object and have relatively small horizontal stiffness to achieve horizontal seismic isolation. In addition, due to limitations in materials and structure, traditional seismic isolation bearings (such as vibration isolation rubber bearings and friction pendulums) have large vertical stiffness and cannot achieve vertical vibration isolation.

[0003] In addition, most buildings do not require vertical vibration isolation because during an earthquake, only a small area near the epicenter needs vertical vibration isolation, which is mainly used to block the seismic P waves. Areas outside the epicenter only need horizontal vibration isolation, which is mainly used to block the seismic S waves. This is why traditional horizontal vibration isolation bearings can be widely used.

[0004] In recent years, the rapid development of convenient and efficient above-ground and underground rail transit has made buildings along the tracks and around transportation hubs highly valuable for commercial development. In low-intensity seismic fortification zones, the vibrations and noise generated by trains operating on the tracks significantly affect the comfort and commercial value of buildings along the tracks and around transportation hubs. Traditional seismic isolation bearings cannot isolate vertical vibrations and noise along solid propagation paths. Therefore, in addition to horizontal seismic isolation that meets the seismic fortification intensity requirements, vertical vibration isolation is also needed to ultimately achieve three-dimensional seismic isolation.

[0005] Existing three-dimensional vibration-controlled bearings for three-dimensional seismic isolation, such as the one disclosed in CN202321795382.2, connect the horizontal and vertical isolation bearings via a single-layer steel plate structure, such as a base plate. This structure results in the modular elastomers located directly beneath the horizontal isolation bearing not receiving uniform vertical constraint forces during preloading or replacement locking, potentially causing significant deformation of the upper and lower connecting plates. This makes preloading and replacement of the three-dimensional vibration-controlled bearing difficult. When the bearing capacity exceeds a certain value, the effective bearing area of ​​the horizontal isolation bearing is much smaller than the area of ​​the lower modular elastomers. The single-layer steel plate design of the upper connecting plate also makes it more prone to deformation under compression. Overcoming this deformation requires a significant increase in the plate thickness, leading to increased costs. On the other hand, the installation method of its guide rod directly limits the available area size of the horizontal seismic isolation bearing. The upper connecting plate is in direct contact with the guide rod, and the construction operation of the connection structure between the upper and lower plates is difficult. The guide rod passes through the middle of the elastic body, which will reduce the effective bearing area and the deformation under the same load. The static stiffness and dynamic stiffness will usually decrease. The material thickness at the perforation becomes thinner. When subjected to long-term vibration, temperature changes or media erosion, the edge of the hole is prone to accelerated aging, cracking or delamination, resulting in a decrease in durability. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a novel vibration-controlled elastic seismic isolation bearing. Its hollow box structure design effectively solves these issues, ensuring vibration isolation performance without excessively increasing the overall weight of the bearing. It also reduces the manufacturing and maintenance costs of the bearing, removes the limitations imposed by mechanical structures on the bearing's specifications, and enhances its practicality.

[0007] Specifically, this utility model is implemented as follows: a vibration-damping dual-control elastic vibration isolation bearing includes a horizontal vibration isolation bearing, a vertical vibration isolation bearing, and an intermediate connecting plate. The intermediate connecting plate is a box-type structure, including an upper plate, a lower plate, and an intermediate support connecting the upper and lower plates. The edge and interior of the intermediate connecting plate are provided with several working spaces. The horizontal vibration isolation bearing is fixedly installed on the upper plate. The lower plate is installed on the vertical vibration isolation bearing through several vertically distributed guide rods. The vertical vibration isolation bearing includes a base plate and several elastic bodies. The elastic bodies are evenly arranged with gaps between them and are pressed between the lower plate of the intermediate connecting plate and the base plate of the vertical vibration isolation bearing. The guide rods pass through the working spaces, through the lower plate, and connect to the base plate of the vertical vibration isolation bearing. The guide rods are evenly distributed between the arrangement gaps of the elastic bodies. The end of the guide rod located in the working space is fastened to the intermediate connecting plate and the vertical vibration isolation bearing by adjusting the nut.

[0008] Furthermore, the guide rod is located at one end of the base plate and is fixed to the base plate by thread or welding. The rod end facing away from the base plate has a thread, protrudes from the lower plate and is threaded to the adjusting nut, so that the height of the vertical vibration isolation support can be adjusted by the adjusting nut.

[0009] Furthermore, a buffer pad is provided between the adjusting nut and the lower plate, and the buffer pad is used to buffer and limit the movement between the adjusting nut and the lower plate.

[0010] Furthermore, the lower plate has a guide hole for the guide rod to pass through. The diameter of the guide hole is larger than the outer diameter of the guide rod, so that there is a gap between the guide rod and the lower plate. A buffer sleeve is fitted in the gap, and the buffer sleeve is used to buffer the guide rod and the lower plate.

[0011] Furthermore, the buffer sleeve is composed of alternating layers of lubricating rings and elastic rings.

[0012] Furthermore, a limiting rod is provided between the base plate and the lower plate. The middle part of the limiting rod is wider than the two ends, and the length of the middle part is less than the distance between the base plate and the lower plate. Its lower end is threaded to the base plate to limit the minimum distance between the base plate and the intermediate connecting plate, but does not affect the normal operation of the elastomer.

[0013] Furthermore, the limiting rods are a plurality of ones, which are arranged on the periphery of the elastic body and vertically located between the gaps of the elastic body.

[0014] Furthermore, the elastic body is modularly designed, with positioning grooves provided on the upper and lower end faces of the elastic block, the lower surface of the lower plate, and the upper surface of the base plate. The three are embedded in the positioning grooves by positioning pins, and are connected in series in the vertical direction to achieve horizontal positioning.

[0015] Furthermore, the elastomer is a single, integrated piece, which can adjust the number, layers, distribution, spacing, and gaps of the array according to actual load-bearing requirements, allowing for flexible configuration.

[0016] Furthermore, the horizontal vibration isolation bearing, the vertical vibration isolation bearing, and the elastomer are made of rubber; high-strength tensile and shear bolts are provided between the horizontal vibration isolation bearing and the upper plate of the intermediate connecting plate.

[0017] The working principle of this utility model: Traditional bearings with single-layer steel plate connecting plates suffer from problems such as large deformation, limited load-bearing area, and insufficient maintenance space. The new bearing adopts a box-type intermediate connecting plate with a hollow structure consisting of an upper plate, a lower plate, and an intermediate support. Through the coordinated force-bearing of the upper plate, lower plate, and intermediate support, the overall rigidity is greatly improved, reducing deformation when subjected to vertical pressure and avoiding the cost problem of increasing plate thickness due to deformation of a single-layer steel plate. The lower plate also serves as the top plate of the vertical vibration isolation bearing, making the structure more compact and integrated. The intermediate support of the box increases the rigidity of the overall structure, and the gaps between adjacent supports and the reserved space inside form a "working space," providing an operating channel and space for maintenance operations such as bearing preloading and guide rod adjustment, solving the problems of difficult preloading and replacement caused by the enclosed structure of traditional bearings. The elastic bodies are spaced apart and evenly distributed between the lower plate and the base plate, ensuring uniform vertical load-bearing capacity and providing space for guide rod arrangement. The guide rods are distributed in the gaps between the elastic bodies through the working space of the intermediate connecting plate, rather than passing through the elastic bodies themselves, thus avoiding encroachment on the effective load-bearing area of ​​the elastic bodies and ensuring their integrity performance. The elastic bodies can be stacked modularly or as single integrated pieces, and the vertical stiffness can be flexibly adjusted by changing the number and distribution spacing to meet different vertical load requirements. When stacked modularly, the positioning grooves and positioning pins on the upper and lower end faces of the elastic bodies, the lower surface of the lower plate, and the upper surface of the base plate cooperate to achieve series positioning of the elastic bodies in the vertical direction, ensuring horizontal stability and preventing displacement. The guide rod is secured by an adjusting nut; the adjusting nut adjusts the vertical height, and the height of the elastomer can be adjusted by compressing the height of the elastomer, thereby adjusting the height of the vertical vibration isolation support. Combined with a buffer pad and buffer sleeve, and with the lubricating ring and elastic ring overlapping, this reduces frictional vibration between the guide rod and the lower plate, achieving stability and buffering effect in the vertical connection. A limiting rod between the base plate and the lower plate limits the minimum distance between them, preventing excessive pressure damage to the elastomer without affecting its normal operation. The horizontal vibration isolation support is fixed to the upper plate of the intermediate connecting plate, achieving horizontal vibration isolation through the low horizontal stiffness of its rubber material. High-strength tensile and shear bolts ensure horizontal stability. The stable connection between the seismic isolation bearing and the intermediate connecting plate resists horizontal shear force; the elastic body of the vertical vibration isolation bearing absorbs vertical vibration through its own vertical deformation, and the spaced arrangement of the elastic body and the synergy with the box-type intermediate connecting plate ensure the uniform transmission of vertical force; in summary, this utility model improves structural stiffness and operating space through the box-type intermediate connecting plate, the staggered and uniform arrangement of the elastic body and guide rod ensures vertical load-bearing performance and durability, and the modular elastic body and adjustable guide rod achieve performance adaptation and convenient maintenance. Finally, it achieves "dual control of seismic vibration" (isolation of earthquake and traffic vibration) in a single bearing, while reducing costs and improving practicality.

[0018] The beneficial effects of this utility model are:

[0019] (1) The intermediate connecting plate of this utility model adopts a box-type structure. Compared with the traditional single-layer steel plate, the overall rigidity is greatly improved by synergistic force. When subjected to vertical pressure, it can effectively reduce the deformation of the upper and lower connecting plates and avoid the risk of support failure due to deformation. At the same time, it does not need to overcome deformation by significantly increasing the plate thickness, making the material cost controllable. The "working space" reserved in the intermediate connecting plate provides a convenient channel for pre-compression, elastomer replacement, guide rod adjustment and other operations.

[0020] (2) The guide rod passes through the gap of the elastic body, avoiding encroachment on the effective bearing area of ​​the elastic body and ensuring its structural integrity. The number and size of the elastic bodies can be distributed according to actual needs, improving the flexibility of installation and the convenience of maintenance. The buffer pad between the adjusting nut and the lower plate reduces the impact during tightening, and the buffer sleeve between the guide rod and the lower plate reduces friction and vibration transmission. The limiting rod limits the minimum distance between the base plate and the lower plate, preventing the elastic body from being damaged by excessive pressure and playing a protective role.

[0021] In terms of overall structure, this utility model achieves the comprehensive advantages of excellent vibration isolation effect, structural stability, low cost and easy maintenance, and is especially suitable for scenarios that require simultaneous isolation of horizontal and vertical vibrations, such as along rail transit lines and around transportation hubs. Attached Figure Description

[0022] Figure 1 This is an isometric view of a vibration-controlled elastic seismic isolation bearing according to this utility model;

[0023] Figure 2 This is a top view of a vibration-controlled elastic seismic isolation bearing according to this utility model;

[0024] Figure 3 This is a perspective view of a vibration-controlled elastic seismic isolation bearing according to this utility model;

[0025] Figure 4 This is a perspective view of the intermediate connecting plate of a vibration-controlled elastic seismic isolation bearing according to this utility model;

[0026] Figure 5 yes Figure 1 A magnified view of part A in the middle;

[0027] Figure 6 This is a partial sectional view of a vibration-controlled elastic seismic isolation bearing according to this utility model;

[0028] Figure 7 yes Figure 1 Schematic diagram of the AA section structure;

[0029] Reference numerals: 100—Horizontal vibration isolation bearing; 200—Vertical vibration isolation bearing; 110—High-strength tensile and shear bolt; 210—Intermediate connecting plate; 211—Upper plate; 212—Lower plate; 213—Intermediate support; 214—Guide hole; 215—Buffer sleeve; 216—Working space; 217—Bolt hole; 220—Adjusting nut; 230—Guide rod; 240—Elastic body; 241—Positioning pin; 250—Base plate; 260—Buffer pad; 270—Limiting rod. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] Example 1:

[0032] refer to Figure 1-7 As shown, this patent provides a vibration-controlled elastic seismic isolation bearing, including a horizontal rubber seismic isolation bearing 100 and a vertical seismic isolation bearing 200. The horizontal rubber seismic isolation bearing 100 and the vertical seismic isolation bearing 200 are connected and fixed by high-strength tensile and shear bolts 110.

[0033] The vertical vibration isolation support 200 located below includes an intermediate connecting plate 210, an elastic body 240, a guide rod 230, an adjusting nut 220, a base plate 250, and a positioning pin 241. The intermediate connecting plate 210 is located above the base plate 250. The intermediate connecting plate 210 and the base plate 250 are connected in series through the guide rod 230 and the adjusting nut 220. The elastic body 240 is clamped between the intermediate connecting plate 210 and the base plate 250.

[0034] In this example, the elastomer 240 is a modular small-diameter rubber support. A total of 240108 elastomers are provided, stacked in 3 layers, and arranged in a 6×6 rectangular centrally symmetrical array with gaps between them.

[0035] In the horizontal direction, the layers of elastic body 240 are connected and fixed in series by 144 positioning pins 241 in conjunction with positioning grooves provided on the upper and lower end faces of the elastic body 240, the lower surface of the lower plate 212, and the upper surface of the base plate 250.

[0036] The intermediate connecting plate 210 is a box structure, including an upper plate 211, a lower plate 212, and an intermediate support 213, which are integrally formed by welding or casting. There is a working space 216 between the upper plate 211 and the lower plate 212. The upper plate 211 is provided with a connecting threaded hole 217, and the lower plate 212 is provided with a guide hole 214. In this example, there are a total of 24 guide holes 214, which correspond to the arrangement gap of the elastic body 240 in the vertical direction.

[0037] This example uses 24 guide rods (230). Each guide rod (230) passes through the gaps between the elastic bodies 240. One end of each guide rod (230) is fixedly connected to the base plate (250), and the other end passes through the guide hole 214 into the lower plate 212. The end of each guide rod (230) facing away from the base plate (250) protrudes from the lower plate 212 and is threaded with an adjusting nut 220. The height of the vertical vibration isolation support 200 can be adjusted by compressing the height of the elastic body 240 through the adjusting nut 220.

[0038] A buffer pad 260 is provided between the adjusting nut 220 and the lower plate 212. In this example, a total of 24 buffer pads 260 are provided. The buffer pads 260 are used to buffer and limit the movement of the adjusting nut 220 and the lower plate 212.

[0039] The diameter of the guide hole 214 is larger than the outer diameter of the guide rod (230). A buffer sleeve 215 is provided between the guide rod 230 and the guide hole 214. In this example, a total of 24 buffer sleeves 215 are provided. The buffer sleeve 215 is made of polytetrafluoroethylene tube and rubber tube stacked together. The polytetrafluoroethylene tube can reduce the coefficient of friction with the guide rod 230, and the rubber tube can play a buffering role.

[0040] This example features 16 limiting rods 270. The lower part of each limiting rod 270 is threadedly connected to the upper surface of the base plate 250, located between the base plate 250 and the intermediate connecting plate 210. The limiting rods 270 are used to limit the minimum distance between the base plate 250 and the intermediate connecting plate 210, preventing the entire support from collapsing due to the failure of the elastic body 240, without affecting the normal operation of the elastic body 240.

[0041] Implement Column 2:

[0042] Based on the above embodiments, a further option for the vertical vibration isolation support 200 is that the elastic body 240 can be replaced with a standard helical spring, disc spring, or other elastic element with controllable performance to achieve the purpose of vertical vibration isolation.

[0043] Implement column 3:

[0044] Based on the above embodiments, a further option for the horizontal rubber seismic isolation bearing 100 is that the horizontal rubber seismic isolation bearing 100 can be replaced with a friction pendulum, a spherical bearing, or a rubber sliding plate bearing to achieve the purpose of horizontal seismic isolation.

[0045] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A vibration-controlled elastic seismic isolation bearing, comprising a horizontal seismic isolation bearing and a vertical seismic isolation bearing, characterized in that: It also includes an intermediate connecting plate, which is a box-type structure, including an upper plate, a lower plate, and an intermediate support connecting the upper plate and the lower plate. The edge and interior of the intermediate connecting plate are provided with several working spaces. The horizontal seismic isolation support is fixedly installed on the upper plate. The lower plate is installed on the vertical seismic isolation support through several vertically distributed guide rods. The vertical vibration isolation support includes a base plate and several elastic bodies. The elastic bodies are evenly arranged with gaps between them and are pressed between the lower plate of the intermediate connecting plate and the base plate of the vertical vibration isolation support. The guide rod passes through the lower plate from the working space and connects to the base plate of the vertical vibration isolation support. The guide rod is evenly distributed between the arrangement gaps of the elastic body. The end of the guide rod located in the working space is fastened to the intermediate connecting plate and the vertical vibration isolation support by adjusting the nut.

2. The vibration-controlled elastic seismic isolation bearing according to claim 1, characterized in that, The guide rod is located at one end of the base plate and is fixed to the base plate by thread or welding. The rod end facing away from the base plate has a thread, protrudes from the lower plate and is threaded to the adjusting nut, so that the height of the vertical vibration isolation support can be adjusted by the adjusting nut.

3. The vibration-controlled elastic seismic isolation bearing according to claim 2, characterized in that, A buffer pad is provided between the adjusting nut and the lower plate, and the buffer pad is used to buffer and limit the movement between the adjusting nut and the lower plate.

4. The vibration-controlled elastic seismic isolation bearing according to claim 1, characterized in that, The lower plate has a guide hole for the guide rod to pass through. The diameter of the guide hole is larger than the outer diameter of the guide rod, so that there is a gap between the guide rod and the lower plate. A buffer sleeve is fitted in the gap, and the buffer sleeve is used to buffer the guide rod and the lower plate.

5. The vibration-controlled elastic seismic isolation bearing according to claim 4, characterized in that, The buffer sleeve is composed of alternating layers of lubricating rings and elastic rings.

6. The vibration-controlled elastic seismic isolation bearing according to claim 1, characterized in that, A limiting rod is provided between the base plate and the lower plate. The middle part of the limiting rod is wider than the two ends, and the length of the middle part is less than the distance between the base plate and the lower plate. Its lower end is threaded to the base plate to limit the minimum distance between the base plate and the intermediate connecting plate, but does not affect the normal operation of the elastomer.

7. The vibration-controlled elastic seismic isolation bearing according to claim 6, characterized in that, The limiting rods consist of several rods, which are arranged on the periphery of the elastic body and vertically positioned between the gaps in the elastic body.

8. The vibration-controlled elastic seismic isolation bearing according to claim 7, characterized in that, The elastic body is modularly designed, with positioning grooves on the upper and lower end faces of the elastic block, the lower surface of the lower plate, and the upper surface of the base plate. The three are embedded in the positioning grooves by positioning pins, and are connected in series in the vertical direction to achieve horizontal positioning.

9. The vibration-controlled elastic seismic isolation bearing according to claim 7, characterized in that, The elastomer is a single, integrated piece. The number of arrays, layers, distribution, spacing, and gaps can be adjusted according to actual load-bearing requirements, allowing for flexible combinations.

10. The vibration-controlled elastic seismic isolation bearing according to claim 1, characterized in that, The horizontal vibration isolation bearing, the vertical vibration isolation bearing, and the elastic body are made of rubber; high-strength tensile and shear bolts are provided between the horizontal vibration isolation bearing and the upper plate of the intermediate connecting plate.

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